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/****************************************************************************
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**
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** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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** All rights reserved.
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** Contact: Nokia Corporation (qt-info@nokia.com)
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**
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** This file is part of the QtGui module of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:LGPL$
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** No Commercial Usage
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** This file contains pre-release code and may not be distributed.
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** You may use this file in accordance with the terms and conditions
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** contained in the Technology Preview License Agreement accompanying
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** this package.
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**
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** GNU Lesser General Public License Usage
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** Alternatively, this file may be used under the terms of the GNU Lesser
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** General Public License version 2.1 as published by the Free Software
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** Foundation and appearing in the file LICENSE.LGPL included in the
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** packaging of this file. Please review the following information to
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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**
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** In addition, as a special exception, Nokia gives you certain additional
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** rights. These rights are described in the Nokia Qt LGPL Exception
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** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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**
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** If you have questions regarding the use of this file, please contact
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** Nokia at qt-info@nokia.com.
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**
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**
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**
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**
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**
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**
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**
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include "qlistview.h"
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#ifndef QT_NO_LISTVIEW
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#include <qabstractitemdelegate.h>
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#include <qapplication.h>
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#include <qpainter.h>
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#include <qbitmap.h>
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#include <qvector.h>
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#include <qstyle.h>
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#include <qevent.h>
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#include <qscrollbar.h>
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#include <qrubberband.h>
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#include <private/qlistview_p.h>
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#include <qdebug.h>
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#ifndef QT_NO_ACCESSIBILITY
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#include <qaccessible.h>
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#endif
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QT_BEGIN_NAMESPACE
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/*!
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\class QListView
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\brief The QListView class provides a list or icon view onto a model.
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\ingroup model-view
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\ingroup advanced
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A QListView presents items stored in a model, either as a simple
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non-hierarchical list, or as a collection of icons. This class is used
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to provide lists and icon views that were previously provided by the
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\c QListBox and \c QIconView classes, but using the more flexible
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approach provided by Qt's model/view architecture.
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The QListView class is one of the \l{Model/View Classes}
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and is part of Qt's \l{Model/View Programming}{model/view framework}.
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This view does not display horizontal or vertical headers; to display
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a list of items with a horizontal header, use QTreeView instead.
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QListView implements the interfaces defined by the
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QAbstractItemView class to allow it to display data provided by
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models derived from the QAbstractItemModel class.
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Items in a list view can be displayed using one of two view modes:
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In \l ListMode, the items are displayed in the form of a simple list;
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in \l IconMode, the list view takes the form of an \e{icon view} in
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which the items are displayed with icons like files in a file manager.
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By default, the list view is in \l ListMode. To change the view mode,
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use the setViewMode() function, and to determine the current view mode,
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use viewMode().
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Items in these views are laid out in the direction specified by the
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flow() of the list view. The items may be fixed in place, or allowed
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to move, depending on the view's movement() state.
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If the items in the model cannot be completely laid out in the
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direction of flow, they can be wrapped at the boundary of the view
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widget; this depends on isWrapping(). This property is useful when the
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items are being represented by an icon view.
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The resizeMode() and layoutMode() govern how and when the items are
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laid out. Items are spaced according to their spacing(), and can exist
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within a notional grid of size specified by gridSize(). The items can
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be rendered as large or small icons depending on their iconSize().
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\table 100%
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\row \o \inlineimage windowsxp-listview.png Screenshot of a Windows XP style list view
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\o \inlineimage macintosh-listview.png Screenshot of a Macintosh style table view
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\o \inlineimage plastique-listview.png Screenshot of a Plastique style table view
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\row \o A \l{Windows XP Style Widget Gallery}{Windows XP style} list view.
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\o A \l{Macintosh Style Widget Gallery}{Macintosh style} list view.
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\o A \l{Plastique Style Widget Gallery}{Plastique style} list view.
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\endtable
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\section1 Improving Performance
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It is possible to give the view hints about the data it is handling in order
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to improve its performance when displaying large numbers of items. One approach
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that can be taken for views that are intended to display items with equal sizes
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is to set the \l uniformItemSizes property to true.
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\sa {View Classes}, QTreeView, QTableView, QListWidget
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*/
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/*!
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\enum QListView::ViewMode
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\value ListMode The items are laid out using TopToBottom flow, with Small size and Static movement
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\value IconMode The items are laid out using LeftToRight flow, with Large size and Free movement
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*/
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/*!
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\enum QListView::Movement
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\value Static The items cannot be moved by the user.
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\value Free The items can be moved freely by the user.
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\value Snap The items snap to the specified grid when moved; see
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setGridSize().
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*/
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/*!
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\enum QListView::Flow
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\value LeftToRight The items are laid out in the view from the left
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to the right.
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\value TopToBottom The items are laid out in the view from the top
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to the bottom.
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*/
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/*!
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\enum QListView::ResizeMode
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\value Fixed The items will only be laid out the first time the view is shown.
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\value Adjust The items will be laid out every time the view is resized.
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*/
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/*!
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\enum QListView::LayoutMode
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\value SinglePass The items are laid out all at once.
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\value Batched The items are laid out in batches of \l batchSize items.
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\sa batchSize
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*/
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/*!
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\since 4.2
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\fn void QListView::indexesMoved(const QModelIndexList &indexes)
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This signal is emitted when the specified \a indexes are moved in the view.
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*/
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/*!
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Creates a new QListView with the given \a parent to view a model.
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Use setModel() to set the model.
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*/
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QListView::QListView(QWidget *parent)
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: QAbstractItemView(*new QListViewPrivate, parent)
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{
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setViewMode(ListMode);
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setSelectionMode(SingleSelection);
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setAttribute(Qt::WA_MacShowFocusRect);
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Q_D(QListView); // We rely on a qobject_cast for PM_DefaultFrameWidth to change
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d->updateStyledFrameWidths(); // hence we have to force an update now that the object has been constructed
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}
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/*!
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\internal
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*/
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QListView::QListView(QListViewPrivate &dd, QWidget *parent)
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: QAbstractItemView(dd, parent)
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{
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setViewMode(ListMode);
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setSelectionMode(SingleSelection);
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setAttribute(Qt::WA_MacShowFocusRect);
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Q_D(QListView); // We rely on a qobject_cast for PM_DefaultFrameWidth to change
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d->updateStyledFrameWidths(); // hence we have to force an update now that the object has been constructed
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}
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/*!
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Destroys the view.
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*/
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QListView::~QListView()
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{
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}
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/*!
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\property QListView::movement
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\brief whether the items can be moved freely, are snapped to a
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grid, or cannot be moved at all.
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This property determines how the user can move the items in the
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view. \l Static means that the items can't be moved the user. \l
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Free means that the user can drag and drop the items to any
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position in the view. \l Snap means that the user can drag and
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drop the items, but only to the positions in a notional grid
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signified by the gridSize property.
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Setting this property when the view is visible will cause the
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items to be laid out again.
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By default, this property is set to \l Static.
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\sa gridSize, resizeMode, viewMode
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*/
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void QListView::setMovement(Movement movement)
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{
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Q_D(QListView);
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d->modeProperties |= uint(QListViewPrivate::Movement);
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d->movement = movement;
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#ifndef QT_NO_DRAGANDDROP
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bool movable = (movement != Static);
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setDragEnabled(movable);
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d->viewport->setAcceptDrops(movable);
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#endif
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d->doDelayedItemsLayout();
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}
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QListView::Movement QListView::movement() const
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{
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Q_D(const QListView);
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return d->movement;
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}
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/*!
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\property QListView::flow
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\brief which direction the items layout should flow.
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If this property is \l LeftToRight, the items will be laid out left
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to right. If the \l isWrapping property is true, the layout will wrap
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when it reaches the right side of the visible area. If this
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property is \l TopToBottom, the items will be laid out from the top
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of the visible area, wrapping when it reaches the bottom.
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Setting this property when the view is visible will cause the
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items to be laid out again.
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By default, this property is set to \l TopToBottom.
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\sa viewMode
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*/
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void QListView::setFlow(Flow flow)
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{
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Q_D(QListView);
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d->modeProperties |= uint(QListViewPrivate::Flow);
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d->flow = flow;
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d->doDelayedItemsLayout();
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}
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QListView::Flow QListView::flow() const
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{
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Q_D(const QListView);
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return d->flow;
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}
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/*!
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\property QListView::isWrapping
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\brief whether the items layout should wrap.
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This property holds whether the layout should wrap when there is
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no more space in the visible area. The point at which the layout wraps
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depends on the \l flow property.
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Setting this property when the view is visible will cause the
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items to be laid out again.
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By default, this property is false.
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\sa viewMode
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*/
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void QListView::setWrapping(bool enable)
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{
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Q_D(QListView);
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d->modeProperties |= uint(QListViewPrivate::Wrap);
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d->setWrapping(enable);
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d->doDelayedItemsLayout();
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}
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bool QListView::isWrapping() const
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{
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Q_D(const QListView);
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return d->isWrapping();
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}
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/*!
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\property QListView::resizeMode
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\brief whether the items are laid out again when the view is resized.
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If this property is \l Adjust, the items will be laid out again
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when the view is resized. If the value is \l Fixed, the items will
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not be laid out when the view is resized.
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By default, this property is set to \l Fixed.
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\sa movement, gridSize, viewMode
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*/
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void QListView::setResizeMode(ResizeMode mode)
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{
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Q_D(QListView);
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d->modeProperties |= uint(QListViewPrivate::ResizeMode);
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d->resizeMode = mode;
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}
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QListView::ResizeMode QListView::resizeMode() const
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{
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Q_D(const QListView);
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return d->resizeMode;
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}
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/*!
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\property QListView::layoutMode
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\brief determines whether the layout of items should happen immediately or be delayed.
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This property holds the layout mode for the items. When the mode
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is \l SinglePass (the default), the items are laid out all in one go.
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When the mode is \l Batched, the items are laid out in batches of \l batchSize
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items, while processing events. This makes it possible to
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instantly view and interact with the visible items while the rest
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are being laid out.
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\sa viewMode
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*/
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void QListView::setLayoutMode(LayoutMode mode)
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{
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Q_D(QListView);
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d->layoutMode = mode;
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}
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QListView::LayoutMode QListView::layoutMode() const
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{
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Q_D(const QListView);
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return d->layoutMode;
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}
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/*!
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\property QListView::spacing
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\brief the space between items in the layout
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This property is the size of the empty space that is padded around
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an item in the layout.
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Setting this property when the view is visible will cause the
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items to be laid out again.
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By default, this property contains a value of 0.
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\sa viewMode
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*/
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// ### Qt5: Use same semantic as layouts (spacing is the size of space
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// *between* items)
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void QListView::setSpacing(int space)
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{
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Q_D(QListView);
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d->modeProperties |= uint(QListViewPrivate::Spacing);
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d->setSpacing(space);
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d->doDelayedItemsLayout();
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}
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int QListView::spacing() const
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{
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Q_D(const QListView);
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return d->spacing();
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}
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/*!
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\property QListView::batchSize
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\brief the number of items laid out in each batch if \l layoutMode is
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set to \l Batched
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The default value is 100.
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\since 4.2
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*/
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void QListView::setBatchSize(int batchSize)
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{
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Q_D(QListView);
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if (batchSize <= 0) {
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qWarning("Invalid batchSize (%d)", batchSize);
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return;
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}
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d->batchSize = batchSize;
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}
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int QListView::batchSize() const
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{
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Q_D(const QListView);
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return d->batchSize;
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}
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/*!
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\property QListView::gridSize
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\brief the size of the layout grid
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This property is the size of the grid in which the items are laid
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out. The default is an empty size which means that there is no
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grid and the layout is not done in a grid. Setting this property
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to a non-empty size switches on the grid layout. (When a grid
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layout is in force the \l spacing property is ignored.)
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Setting this property when the view is visible will cause the
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items to be laid out again.
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\sa viewMode
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*/
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void QListView::setGridSize(const QSize &size)
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{
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Q_D(QListView);
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d->modeProperties |= uint(QListViewPrivate::GridSize);
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d->setGridSize(size);
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d->doDelayedItemsLayout();
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}
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QSize QListView::gridSize() const
|
|
438 |
{
|
|
439 |
Q_D(const QListView);
|
|
440 |
return d->gridSize();
|
|
441 |
}
|
|
442 |
|
|
443 |
/*!
|
|
444 |
\property QListView::viewMode
|
|
445 |
\brief the view mode of the QListView.
|
|
446 |
|
|
447 |
This property will change the other unset properties to conform
|
|
448 |
with the set view mode. QListView-specific properties that have already been set
|
|
449 |
will not be changed, unless clearPropertyFlags() has been called.
|
|
450 |
|
|
451 |
Setting the view mode will enable or disable drag and drop based on the
|
|
452 |
selected movement. For ListMode, the default movement is \l Static
|
|
453 |
(drag and drop disabled); for IconMode, the default movement is
|
|
454 |
\l Free (drag and drop enabled).
|
|
455 |
|
|
456 |
\sa isWrapping, spacing, gridSize, flow, movement, resizeMode
|
|
457 |
*/
|
|
458 |
void QListView::setViewMode(ViewMode mode)
|
|
459 |
{
|
|
460 |
Q_D(QListView);
|
|
461 |
if (d->commonListView && d->viewMode == mode)
|
|
462 |
return;
|
|
463 |
d->viewMode = mode;
|
|
464 |
|
|
465 |
delete d->commonListView;
|
|
466 |
if (mode == ListMode) {
|
|
467 |
d->commonListView = new QListModeViewBase(this, d);
|
|
468 |
if (!(d->modeProperties & QListViewPrivate::Wrap))
|
|
469 |
d->setWrapping(false);
|
|
470 |
if (!(d->modeProperties & QListViewPrivate::Spacing))
|
|
471 |
d->setSpacing(0);
|
|
472 |
if (!(d->modeProperties & QListViewPrivate::GridSize))
|
|
473 |
d->setGridSize(QSize());
|
|
474 |
if (!(d->modeProperties & QListViewPrivate::Flow))
|
|
475 |
d->flow = TopToBottom;
|
|
476 |
if (!(d->modeProperties & QListViewPrivate::Movement))
|
|
477 |
d->movement = Static;
|
|
478 |
if (!(d->modeProperties & QListViewPrivate::ResizeMode))
|
|
479 |
d->resizeMode = Fixed;
|
|
480 |
if (!(d->modeProperties & QListViewPrivate::SelectionRectVisible))
|
|
481 |
d->showElasticBand = false;
|
|
482 |
} else {
|
|
483 |
d->commonListView = new QIconModeViewBase(this, d);
|
|
484 |
if (!(d->modeProperties & QListViewPrivate::Wrap))
|
|
485 |
d->setWrapping(true);
|
|
486 |
if (!(d->modeProperties & QListViewPrivate::Spacing))
|
|
487 |
d->setSpacing(0);
|
|
488 |
if (!(d->modeProperties & QListViewPrivate::GridSize))
|
|
489 |
d->setGridSize(QSize());
|
|
490 |
if (!(d->modeProperties & QListViewPrivate::Flow))
|
|
491 |
d->flow = LeftToRight;
|
|
492 |
if (!(d->modeProperties & QListViewPrivate::Movement))
|
|
493 |
d->movement = Free;
|
|
494 |
if (!(d->modeProperties & QListViewPrivate::ResizeMode))
|
|
495 |
d->resizeMode = Fixed;
|
|
496 |
if (!(d->modeProperties & QListViewPrivate::SelectionRectVisible))
|
|
497 |
d->showElasticBand = true;
|
|
498 |
}
|
|
499 |
|
|
500 |
#ifndef QT_NO_DRAGANDDROP
|
|
501 |
bool movable = (d->movement != Static);
|
|
502 |
setDragEnabled(movable);
|
|
503 |
setAcceptDrops(movable);
|
|
504 |
#endif
|
|
505 |
d->clear();
|
|
506 |
d->doDelayedItemsLayout();
|
|
507 |
}
|
|
508 |
|
|
509 |
QListView::ViewMode QListView::viewMode() const
|
|
510 |
{
|
|
511 |
Q_D(const QListView);
|
|
512 |
return d->viewMode;
|
|
513 |
}
|
|
514 |
|
|
515 |
/*!
|
|
516 |
Clears the QListView-specific property flags. See \l{viewMode}.
|
|
517 |
|
|
518 |
Properties inherited from QAbstractItemView are not covered by the
|
|
519 |
property flags. Specifically, \l{QAbstractItemView::dragEnabled}
|
|
520 |
{dragEnabled} and \l{QAbstractItemView::acceptDrops}
|
|
521 |
{acceptsDrops} are computed by QListView when calling
|
|
522 |
setMovement() or setViewMode().
|
|
523 |
*/
|
|
524 |
void QListView::clearPropertyFlags()
|
|
525 |
{
|
|
526 |
Q_D(QListView);
|
|
527 |
d->modeProperties = 0;
|
|
528 |
}
|
|
529 |
|
|
530 |
/*!
|
|
531 |
Returns true if the \a row is hidden; otherwise returns false.
|
|
532 |
*/
|
|
533 |
bool QListView::isRowHidden(int row) const
|
|
534 |
{
|
|
535 |
Q_D(const QListView);
|
|
536 |
return d->isHidden(row);
|
|
537 |
}
|
|
538 |
|
|
539 |
/*!
|
|
540 |
If \a hide is true, the given \a row will be hidden; otherwise
|
|
541 |
the \a row will be shown.
|
|
542 |
*/
|
|
543 |
void QListView::setRowHidden(int row, bool hide)
|
|
544 |
{
|
|
545 |
Q_D(QListView);
|
|
546 |
const bool hidden = d->isHidden(row);
|
|
547 |
if (hide && !hidden)
|
|
548 |
d->commonListView->appendHiddenRow(row);
|
|
549 |
else if (!hide && hidden)
|
|
550 |
d->commonListView->removeHiddenRow(row);
|
|
551 |
d->doDelayedItemsLayout();
|
|
552 |
d->viewport->update();
|
|
553 |
}
|
|
554 |
|
|
555 |
/*!
|
|
556 |
\reimp
|
|
557 |
*/
|
|
558 |
QRect QListView::visualRect(const QModelIndex &index) const
|
|
559 |
{
|
|
560 |
Q_D(const QListView);
|
|
561 |
return d->mapToViewport(rectForIndex(index));
|
|
562 |
}
|
|
563 |
|
|
564 |
/*!
|
|
565 |
\reimp
|
|
566 |
*/
|
|
567 |
void QListView::scrollTo(const QModelIndex &index, ScrollHint hint)
|
|
568 |
{
|
|
569 |
Q_D(QListView);
|
|
570 |
|
|
571 |
if (index.parent() != d->root || index.column() != d->column)
|
|
572 |
return;
|
|
573 |
|
|
574 |
const QRect rect = visualRect(index);
|
|
575 |
if (hint == EnsureVisible && d->viewport->rect().contains(rect)) {
|
|
576 |
d->viewport->update(rect);
|
|
577 |
return;
|
|
578 |
}
|
|
579 |
|
|
580 |
if (d->flow == QListView::TopToBottom || d->isWrapping()) // vertical
|
|
581 |
verticalScrollBar()->setValue(d->verticalScrollToValue(index, rect, hint));
|
|
582 |
|
|
583 |
if (d->flow == QListView::LeftToRight || d->isWrapping()) // horizontal
|
|
584 |
horizontalScrollBar()->setValue(d->horizontalScrollToValue(index, rect, hint));
|
|
585 |
}
|
|
586 |
|
|
587 |
int QListViewPrivate::horizontalScrollToValue(const QModelIndex &index, const QRect &rect,
|
|
588 |
QListView::ScrollHint hint) const
|
|
589 |
{
|
|
590 |
Q_Q(const QListView);
|
|
591 |
const QRect area = viewport->rect();
|
|
592 |
const bool leftOf = q->isRightToLeft()
|
|
593 |
? (rect.left() < area.left()) && (rect.right() < area.right())
|
|
594 |
: rect.left() < area.left();
|
|
595 |
const bool rightOf = q->isRightToLeft()
|
|
596 |
? rect.right() > area.right()
|
|
597 |
: (rect.right() > area.right()) && (rect.left() > area.left());
|
|
598 |
return commonListView->horizontalScrollToValue(q->visualIndex(index), hint, leftOf, rightOf, area, rect);
|
|
599 |
}
|
|
600 |
|
|
601 |
int QListViewPrivate::verticalScrollToValue(const QModelIndex &index, const QRect &rect,
|
|
602 |
QListView::ScrollHint hint) const
|
|
603 |
{
|
|
604 |
Q_Q(const QListView);
|
|
605 |
const QRect area = viewport->rect();
|
|
606 |
const bool above = (hint == QListView::EnsureVisible && rect.top() < area.top());
|
|
607 |
const bool below = (hint == QListView::EnsureVisible && rect.bottom() > area.bottom());
|
|
608 |
return commonListView->verticalScrollToValue(q->visualIndex(index), hint, above, below, area, rect);
|
|
609 |
}
|
|
610 |
|
|
611 |
void QListViewPrivate::selectAll(QItemSelectionModel::SelectionFlags command)
|
|
612 |
{
|
|
613 |
if (!selectionModel)
|
|
614 |
return;
|
|
615 |
|
|
616 |
QItemSelection selection;
|
|
617 |
QModelIndex topLeft;
|
|
618 |
int row = 0;
|
|
619 |
const int colCount = model->columnCount(root);
|
|
620 |
for(; row < model->rowCount(root); ++row) {
|
|
621 |
if (isHidden(row)) {
|
|
622 |
//it might be the end of a selection range
|
|
623 |
if (topLeft.isValid()) {
|
|
624 |
QModelIndex bottomRight = model->index(row - 1, colCount - 1, root);
|
|
625 |
selection.append(QItemSelectionRange(topLeft, bottomRight));
|
|
626 |
topLeft = QModelIndex();
|
|
627 |
}
|
|
628 |
continue;
|
|
629 |
}
|
|
630 |
|
|
631 |
if (!topLeft.isValid()) //start of a new selection range
|
|
632 |
topLeft = model->index(row, 0, root);
|
|
633 |
}
|
|
634 |
|
|
635 |
if (topLeft.isValid()) {
|
|
636 |
//last selected range
|
|
637 |
QModelIndex bottomRight = model->index(row - 1, colCount - 1, root);
|
|
638 |
selection.append(QItemSelectionRange(topLeft, bottomRight));
|
|
639 |
}
|
|
640 |
|
|
641 |
if (!selection.isEmpty())
|
|
642 |
selectionModel->select(selection, command);
|
|
643 |
}
|
|
644 |
|
|
645 |
/*!
|
|
646 |
\reimp
|
|
647 |
|
|
648 |
We have a QListView way of knowing what elements are on the viewport
|
|
649 |
through the intersectingSet function
|
|
650 |
*/
|
|
651 |
QItemViewPaintPairs QListViewPrivate::draggablePaintPairs(const QModelIndexList &indexes, QRect *r) const
|
|
652 |
{
|
|
653 |
Q_ASSERT(r);
|
|
654 |
Q_Q(const QListView);
|
|
655 |
QRect &rect = *r;
|
|
656 |
const QRect viewportRect = viewport->rect();
|
|
657 |
QItemViewPaintPairs ret;
|
|
658 |
const QSet<QModelIndex> visibleIndexes = intersectingSet(viewportRect).toList().toSet();
|
|
659 |
for (int i = 0; i < indexes.count(); ++i) {
|
|
660 |
const QModelIndex &index = indexes.at(i);
|
|
661 |
if (visibleIndexes.contains(index)) {
|
|
662 |
const QRect current = q->visualRect(index);
|
|
663 |
ret += qMakePair(current, index);
|
|
664 |
rect |= current;
|
|
665 |
}
|
|
666 |
}
|
|
667 |
rect &= viewportRect;
|
|
668 |
return ret;
|
|
669 |
}
|
|
670 |
|
|
671 |
/*!
|
|
672 |
\internal
|
|
673 |
*/
|
|
674 |
void QListView::reset()
|
|
675 |
{
|
|
676 |
Q_D(QListView);
|
|
677 |
d->clear();
|
|
678 |
d->hiddenRows.clear();
|
|
679 |
QAbstractItemView::reset();
|
|
680 |
}
|
|
681 |
|
|
682 |
/*!
|
|
683 |
\internal
|
|
684 |
*/
|
|
685 |
void QListView::setRootIndex(const QModelIndex &index)
|
|
686 |
{
|
|
687 |
Q_D(QListView);
|
|
688 |
d->column = qBound(0, d->column, d->model->columnCount(index) - 1);
|
|
689 |
QAbstractItemView::setRootIndex(index);
|
|
690 |
// sometimes we get an update before reset() is called
|
|
691 |
d->clear();
|
|
692 |
d->hiddenRows.clear();
|
|
693 |
}
|
|
694 |
|
|
695 |
/*!
|
|
696 |
\internal
|
|
697 |
|
|
698 |
Scroll the view contents by \a dx and \a dy.
|
|
699 |
*/
|
|
700 |
|
|
701 |
void QListView::scrollContentsBy(int dx, int dy)
|
|
702 |
{
|
|
703 |
Q_D(QListView);
|
|
704 |
d->delayedAutoScroll.stop(); // auto scroll was canceled by the user scrolling
|
|
705 |
d->commonListView->scrollContentsBy(dx, dy, d->state == QListView::DragSelectingState);
|
|
706 |
}
|
|
707 |
|
|
708 |
/*!
|
|
709 |
\internal
|
|
710 |
|
|
711 |
Resize the internal contents to \a width and \a height and set the
|
|
712 |
scroll bar ranges accordingly.
|
|
713 |
*/
|
|
714 |
void QListView::resizeContents(int width, int height)
|
|
715 |
{
|
|
716 |
Q_D(QListView);
|
|
717 |
d->setContentsSize(width, height);
|
|
718 |
}
|
|
719 |
|
|
720 |
/*!
|
|
721 |
\internal
|
|
722 |
*/
|
|
723 |
QSize QListView::contentsSize() const
|
|
724 |
{
|
|
725 |
Q_D(const QListView);
|
|
726 |
return d->contentsSize();
|
|
727 |
}
|
|
728 |
|
|
729 |
/*!
|
|
730 |
\reimp
|
|
731 |
*/
|
|
732 |
void QListView::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight)
|
|
733 |
{
|
|
734 |
d_func()->commonListView->dataChanged(topLeft, bottomRight);
|
|
735 |
QAbstractItemView::dataChanged(topLeft, bottomRight);
|
|
736 |
}
|
|
737 |
|
|
738 |
/*!
|
|
739 |
\reimp
|
|
740 |
*/
|
|
741 |
void QListView::rowsInserted(const QModelIndex &parent, int start, int end)
|
|
742 |
{
|
|
743 |
Q_D(QListView);
|
|
744 |
// ### be smarter about inserted items
|
|
745 |
d->clear();
|
|
746 |
d->doDelayedItemsLayout();
|
|
747 |
QAbstractItemView::rowsInserted(parent, start, end);
|
|
748 |
}
|
|
749 |
|
|
750 |
/*!
|
|
751 |
\reimp
|
|
752 |
*/
|
|
753 |
void QListView::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end)
|
|
754 |
{
|
|
755 |
Q_D(QListView);
|
|
756 |
// if the parent is above d->root in the tree, nothing will happen
|
|
757 |
QAbstractItemView::rowsAboutToBeRemoved(parent, start, end);
|
|
758 |
if (parent == d->root) {
|
|
759 |
for (int i = d->hiddenRows.count() - 1; i >= 0; --i) {
|
|
760 |
int hiddenRow = d->hiddenRows.at(i).row();
|
|
761 |
if (hiddenRow >= start && hiddenRow <= end) {
|
|
762 |
d->hiddenRows.remove(i);
|
|
763 |
}
|
|
764 |
}
|
|
765 |
}
|
|
766 |
d->clear();
|
|
767 |
d->doDelayedItemsLayout();
|
|
768 |
}
|
|
769 |
|
|
770 |
/*!
|
|
771 |
\reimp
|
|
772 |
*/
|
|
773 |
void QListView::mouseMoveEvent(QMouseEvent *e)
|
|
774 |
{
|
|
775 |
if (!isVisible())
|
|
776 |
return;
|
|
777 |
Q_D(QListView);
|
|
778 |
QAbstractItemView::mouseMoveEvent(e);
|
|
779 |
if (state() == DragSelectingState
|
|
780 |
&& d->showElasticBand
|
|
781 |
&& d->selectionMode != SingleSelection
|
|
782 |
&& d->selectionMode != NoSelection) {
|
|
783 |
QRect rect(d->pressedPosition, e->pos() + QPoint(horizontalOffset(), verticalOffset()));
|
|
784 |
rect = rect.normalized();
|
|
785 |
d->viewport->update(d->mapToViewport(rect.united(d->elasticBand)));
|
|
786 |
d->elasticBand = rect;
|
|
787 |
}
|
|
788 |
}
|
|
789 |
|
|
790 |
/*!
|
|
791 |
\reimp
|
|
792 |
*/
|
|
793 |
void QListView::mouseReleaseEvent(QMouseEvent *e)
|
|
794 |
{
|
|
795 |
Q_D(QListView);
|
|
796 |
QAbstractItemView::mouseReleaseEvent(e);
|
|
797 |
// #### move this implementation into a dynamic class
|
|
798 |
if (d->showElasticBand && d->elasticBand.isValid()) {
|
|
799 |
d->viewport->update(d->mapToViewport(d->elasticBand));
|
|
800 |
d->elasticBand = QRect();
|
|
801 |
}
|
|
802 |
}
|
|
803 |
|
|
804 |
/*!
|
|
805 |
\reimp
|
|
806 |
*/
|
|
807 |
void QListView::timerEvent(QTimerEvent *e)
|
|
808 |
{
|
|
809 |
Q_D(QListView);
|
|
810 |
if (e->timerId() == d->batchLayoutTimer.timerId()) {
|
|
811 |
if (d->doItemsLayout(d->batchSize)) { // layout is done
|
|
812 |
d->batchLayoutTimer.stop();
|
|
813 |
updateGeometries();
|
|
814 |
d->viewport->update();
|
|
815 |
}
|
|
816 |
}
|
|
817 |
QAbstractItemView::timerEvent(e);
|
|
818 |
}
|
|
819 |
|
|
820 |
/*!
|
|
821 |
\reimp
|
|
822 |
*/
|
|
823 |
void QListView::resizeEvent(QResizeEvent *e)
|
|
824 |
{
|
|
825 |
Q_D(QListView);
|
|
826 |
if (d->delayedPendingLayout)
|
|
827 |
return;
|
|
828 |
|
|
829 |
QSize delta = e->size() - e->oldSize();
|
|
830 |
|
|
831 |
if (delta.isNull())
|
|
832 |
return;
|
|
833 |
|
|
834 |
bool listWrap = (d->viewMode == ListMode) && d->wrapItemText;
|
|
835 |
bool flowDimensionChanged = (d->flow == LeftToRight && delta.width() != 0)
|
|
836 |
|| (d->flow == TopToBottom && delta.height() != 0);
|
|
837 |
|
|
838 |
// We post a delayed relayout in the following cases :
|
|
839 |
// - we're wrapping
|
|
840 |
// - the state is NoState, we're adjusting and the size has changed in the flowing direction
|
|
841 |
if (listWrap
|
|
842 |
|| (state() == NoState && d->resizeMode == Adjust && flowDimensionChanged)) {
|
|
843 |
d->doDelayedItemsLayout(100); // wait 1/10 sec before starting the layout
|
|
844 |
} else {
|
|
845 |
QAbstractItemView::resizeEvent(e);
|
|
846 |
}
|
|
847 |
}
|
|
848 |
|
|
849 |
#ifndef QT_NO_DRAGANDDROP
|
|
850 |
|
|
851 |
/*!
|
|
852 |
\reimp
|
|
853 |
*/
|
|
854 |
void QListView::dragMoveEvent(QDragMoveEvent *e)
|
|
855 |
{
|
|
856 |
if (!d_func()->commonListView->filterDragMoveEvent(e))
|
|
857 |
QAbstractItemView::dragMoveEvent(e);
|
|
858 |
}
|
|
859 |
|
|
860 |
|
|
861 |
/*!
|
|
862 |
\reimp
|
|
863 |
*/
|
|
864 |
void QListView::dragLeaveEvent(QDragLeaveEvent *e)
|
|
865 |
{
|
|
866 |
if (!d_func()->commonListView->filterDragLeaveEvent(e))
|
|
867 |
QAbstractItemView::dragLeaveEvent(e);
|
|
868 |
}
|
|
869 |
|
|
870 |
/*!
|
|
871 |
\reimp
|
|
872 |
*/
|
|
873 |
void QListView::dropEvent(QDropEvent *e)
|
|
874 |
{
|
|
875 |
if (!d_func()->commonListView->filterDropEvent(e))
|
|
876 |
QAbstractItemView::dropEvent(e);
|
|
877 |
}
|
|
878 |
|
|
879 |
/*!
|
|
880 |
\reimp
|
|
881 |
*/
|
|
882 |
void QListView::startDrag(Qt::DropActions supportedActions)
|
|
883 |
{
|
|
884 |
if (!d_func()->commonListView->filterStartDrag(supportedActions))
|
|
885 |
QAbstractItemView::startDrag(supportedActions);
|
|
886 |
}
|
|
887 |
|
|
888 |
/*!
|
|
889 |
\internal
|
|
890 |
|
|
891 |
Called whenever items from the view is dropped on the viewport.
|
|
892 |
The \a event provides additional information.
|
|
893 |
*/
|
|
894 |
void QListView::internalDrop(QDropEvent *event)
|
|
895 |
{
|
|
896 |
// ### Qt5: remove that function
|
|
897 |
Q_UNUSED(event);
|
|
898 |
}
|
|
899 |
|
|
900 |
/*!
|
|
901 |
\internal
|
|
902 |
|
|
903 |
Called whenever the user starts dragging items and the items are movable,
|
|
904 |
enabling internal dragging and dropping of items.
|
|
905 |
*/
|
|
906 |
void QListView::internalDrag(Qt::DropActions supportedActions)
|
|
907 |
{
|
|
908 |
// ### Qt5: remove that function
|
|
909 |
Q_UNUSED(supportedActions);
|
|
910 |
}
|
|
911 |
|
|
912 |
#endif // QT_NO_DRAGANDDROP
|
|
913 |
|
|
914 |
/*!
|
|
915 |
\reimp
|
|
916 |
*/
|
|
917 |
QStyleOptionViewItem QListView::viewOptions() const
|
|
918 |
{
|
|
919 |
Q_D(const QListView);
|
|
920 |
QStyleOptionViewItem option = QAbstractItemView::viewOptions();
|
|
921 |
if (!d->iconSize.isValid()) { // otherwise it was already set in abstractitemview
|
|
922 |
int pm = (d->viewMode == ListMode
|
|
923 |
? style()->pixelMetric(QStyle::PM_ListViewIconSize, 0, this)
|
|
924 |
: style()->pixelMetric(QStyle::PM_IconViewIconSize, 0, this));
|
|
925 |
option.decorationSize = QSize(pm, pm);
|
|
926 |
}
|
|
927 |
if (d->viewMode == IconMode) {
|
|
928 |
option.showDecorationSelected = false;
|
|
929 |
option.decorationPosition = QStyleOptionViewItem::Top;
|
|
930 |
option.displayAlignment = Qt::AlignCenter;
|
|
931 |
} else {
|
|
932 |
option.decorationPosition = QStyleOptionViewItem::Left;
|
|
933 |
}
|
|
934 |
return option;
|
|
935 |
}
|
|
936 |
|
|
937 |
|
|
938 |
/*!
|
|
939 |
\reimp
|
|
940 |
*/
|
|
941 |
void QListView::paintEvent(QPaintEvent *e)
|
|
942 |
{
|
|
943 |
Q_D(QListView);
|
|
944 |
if (!d->itemDelegate)
|
|
945 |
return;
|
|
946 |
QStyleOptionViewItemV4 option = d->viewOptionsV4();
|
|
947 |
QPainter painter(d->viewport);
|
|
948 |
|
|
949 |
const QVector<QModelIndex> toBeRendered = d->intersectingSet(e->rect().translated(horizontalOffset(), verticalOffset()), false);
|
|
950 |
|
|
951 |
const QModelIndex current = currentIndex();
|
|
952 |
const QModelIndex hover = d->hover;
|
|
953 |
const QAbstractItemModel *itemModel = d->model;
|
|
954 |
const QItemSelectionModel *selections = d->selectionModel;
|
|
955 |
const bool focus = (hasFocus() || d->viewport->hasFocus()) && current.isValid();
|
|
956 |
const bool alternate = d->alternatingColors;
|
|
957 |
const QStyle::State state = option.state;
|
|
958 |
const QAbstractItemView::State viewState = this->state();
|
|
959 |
const bool enabled = (state & QStyle::State_Enabled) != 0;
|
|
960 |
|
|
961 |
bool alternateBase = false;
|
|
962 |
int previousRow = -2; // trigger the alternateBase adjustment on first pass
|
|
963 |
|
|
964 |
QVector<QModelIndex>::const_iterator end = toBeRendered.constEnd();
|
|
965 |
for (QVector<QModelIndex>::const_iterator it = toBeRendered.constBegin(); it != end; ++it) {
|
|
966 |
Q_ASSERT((*it).isValid());
|
|
967 |
option.rect = visualRect(*it);
|
|
968 |
|
|
969 |
if (flow() == TopToBottom)
|
|
970 |
option.rect.setWidth(qMin(viewport()->size().width(), option.rect.width()));
|
|
971 |
else
|
|
972 |
option.rect.setHeight(qMin(viewport()->size().height(), option.rect.height()));
|
|
973 |
|
|
974 |
option.state = state;
|
|
975 |
if (selections && selections->isSelected(*it))
|
|
976 |
option.state |= QStyle::State_Selected;
|
|
977 |
if (enabled) {
|
|
978 |
QPalette::ColorGroup cg;
|
|
979 |
if ((itemModel->flags(*it) & Qt::ItemIsEnabled) == 0) {
|
|
980 |
option.state &= ~QStyle::State_Enabled;
|
|
981 |
cg = QPalette::Disabled;
|
|
982 |
} else {
|
|
983 |
cg = QPalette::Normal;
|
|
984 |
}
|
|
985 |
option.palette.setCurrentColorGroup(cg);
|
|
986 |
}
|
|
987 |
if (focus && current == *it) {
|
|
988 |
option.state |= QStyle::State_HasFocus;
|
|
989 |
if (viewState == EditingState)
|
|
990 |
option.state |= QStyle::State_Editing;
|
|
991 |
}
|
|
992 |
if (*it == hover)
|
|
993 |
option.state |= QStyle::State_MouseOver;
|
|
994 |
else
|
|
995 |
option.state &= ~QStyle::State_MouseOver;
|
|
996 |
|
|
997 |
if (alternate) {
|
|
998 |
int row = (*it).row();
|
|
999 |
if (row != previousRow + 1) {
|
|
1000 |
// adjust alternateBase according to rows in the "gap"
|
|
1001 |
if (!d->hiddenRows.isEmpty()) {
|
|
1002 |
for (int r = qMax(previousRow + 1, 0); r < row; ++r) {
|
|
1003 |
if (!d->isHidden(r))
|
|
1004 |
alternateBase = !alternateBase;
|
|
1005 |
}
|
|
1006 |
} else {
|
|
1007 |
alternateBase = (row & 1) != 0;
|
|
1008 |
}
|
|
1009 |
}
|
|
1010 |
if (alternateBase) {
|
|
1011 |
option.features |= QStyleOptionViewItemV2::Alternate;
|
|
1012 |
} else {
|
|
1013 |
option.features &= ~QStyleOptionViewItemV2::Alternate;
|
|
1014 |
}
|
|
1015 |
|
|
1016 |
// draw background of the item (only alternate row). rest of the background
|
|
1017 |
// is provided by the delegate
|
|
1018 |
QStyle::State oldState = option.state;
|
|
1019 |
option.state &= ~QStyle::State_Selected;
|
|
1020 |
style()->drawPrimitive(QStyle::PE_PanelItemViewRow, &option, &painter, this);
|
|
1021 |
option.state = oldState;
|
|
1022 |
|
|
1023 |
alternateBase = !alternateBase;
|
|
1024 |
previousRow = row;
|
|
1025 |
}
|
|
1026 |
|
|
1027 |
if (const QWidget *widget = d->editorForIndex(*it).editor) {
|
|
1028 |
QRegion itemGeometry(option.rect);
|
|
1029 |
QRegion widgetGeometry(widget->geometry());
|
|
1030 |
painter.save();
|
|
1031 |
painter.setClipRegion(itemGeometry.subtracted(widgetGeometry));
|
|
1032 |
d->delegateForIndex(*it)->paint(&painter, option, *it);
|
|
1033 |
painter.restore();
|
|
1034 |
} else {
|
|
1035 |
d->delegateForIndex(*it)->paint(&painter, option, *it);
|
|
1036 |
}
|
|
1037 |
}
|
|
1038 |
|
|
1039 |
#ifndef QT_NO_DRAGANDDROP
|
|
1040 |
d->commonListView->paintDragDrop(&painter);
|
|
1041 |
#endif
|
|
1042 |
|
|
1043 |
#ifndef QT_NO_RUBBERBAND
|
|
1044 |
// #### move this implementation into a dynamic class
|
|
1045 |
if (d->showElasticBand && d->elasticBand.isValid()) {
|
|
1046 |
QStyleOptionRubberBand opt;
|
|
1047 |
opt.initFrom(this);
|
|
1048 |
opt.shape = QRubberBand::Rectangle;
|
|
1049 |
opt.opaque = false;
|
|
1050 |
opt.rect = d->mapToViewport(d->elasticBand, false).intersected(
|
|
1051 |
d->viewport->rect().adjusted(-16, -16, 16, 16));
|
|
1052 |
painter.save();
|
|
1053 |
style()->drawControl(QStyle::CE_RubberBand, &opt, &painter);
|
|
1054 |
painter.restore();
|
|
1055 |
}
|
|
1056 |
#endif
|
|
1057 |
}
|
|
1058 |
|
|
1059 |
/*!
|
|
1060 |
\reimp
|
|
1061 |
*/
|
|
1062 |
QModelIndex QListView::indexAt(const QPoint &p) const
|
|
1063 |
{
|
|
1064 |
Q_D(const QListView);
|
|
1065 |
QRect rect(p.x() + horizontalOffset(), p.y() + verticalOffset(), 1, 1);
|
|
1066 |
const QVector<QModelIndex> intersectVector = d->intersectingSet(rect);
|
|
1067 |
QModelIndex index = intersectVector.count() > 0
|
|
1068 |
? intersectVector.last() : QModelIndex();
|
|
1069 |
if (index.isValid() && visualRect(index).contains(p))
|
|
1070 |
return index;
|
|
1071 |
return QModelIndex();
|
|
1072 |
}
|
|
1073 |
|
|
1074 |
/*!
|
|
1075 |
\reimp
|
|
1076 |
*/
|
|
1077 |
int QListView::horizontalOffset() const
|
|
1078 |
{
|
|
1079 |
return d_func()->commonListView->horizontalOffset();
|
|
1080 |
}
|
|
1081 |
|
|
1082 |
/*!
|
|
1083 |
\reimp
|
|
1084 |
*/
|
|
1085 |
int QListView::verticalOffset() const
|
|
1086 |
{
|
|
1087 |
return d_func()->commonListView->verticalOffset();
|
|
1088 |
}
|
|
1089 |
|
|
1090 |
/*!
|
|
1091 |
\reimp
|
|
1092 |
*/
|
|
1093 |
QModelIndex QListView::moveCursor(CursorAction cursorAction, Qt::KeyboardModifiers modifiers)
|
|
1094 |
{
|
|
1095 |
Q_D(QListView);
|
|
1096 |
Q_UNUSED(modifiers);
|
|
1097 |
|
|
1098 |
QModelIndex current = currentIndex();
|
|
1099 |
if (!current.isValid()) {
|
|
1100 |
int rowCount = d->model->rowCount(d->root);
|
|
1101 |
if (!rowCount)
|
|
1102 |
return QModelIndex();
|
|
1103 |
int row = 0;
|
|
1104 |
while (row < rowCount && d->isHiddenOrDisabled(row))
|
|
1105 |
++row;
|
|
1106 |
if (row >= rowCount)
|
|
1107 |
return QModelIndex();
|
|
1108 |
return d->model->index(row, d->column, d->root);
|
|
1109 |
}
|
|
1110 |
|
|
1111 |
const QRect initialRect = rectForIndex(current);
|
|
1112 |
QRect rect = initialRect;
|
|
1113 |
if (rect.isEmpty()) {
|
|
1114 |
return d->model->index(0, d->column, d->root);
|
|
1115 |
}
|
|
1116 |
if (d->gridSize().isValid()) rect.setSize(d->gridSize());
|
|
1117 |
|
|
1118 |
QSize contents = d->contentsSize();
|
|
1119 |
QVector<QModelIndex> intersectVector;
|
|
1120 |
|
|
1121 |
switch (cursorAction) {
|
|
1122 |
case MoveLeft:
|
|
1123 |
while (intersectVector.isEmpty()) {
|
|
1124 |
rect.translate(-rect.width(), 0);
|
|
1125 |
if (rect.right() <= 0)
|
|
1126 |
return current;
|
|
1127 |
if (rect.left() < 0)
|
|
1128 |
rect.setLeft(0);
|
|
1129 |
intersectVector = d->intersectingSet(rect);
|
|
1130 |
d->removeCurrentAndDisabled(&intersectVector, current);
|
|
1131 |
}
|
|
1132 |
return d->closestIndex(initialRect, intersectVector);
|
|
1133 |
case MoveRight:
|
|
1134 |
while (intersectVector.isEmpty()) {
|
|
1135 |
rect.translate(rect.width(), 0);
|
|
1136 |
if (rect.left() >= contents.width())
|
|
1137 |
return current;
|
|
1138 |
if (rect.right() > contents.width())
|
|
1139 |
rect.setRight(contents.width());
|
|
1140 |
intersectVector = d->intersectingSet(rect);
|
|
1141 |
d->removeCurrentAndDisabled(&intersectVector, current);
|
|
1142 |
}
|
|
1143 |
return d->closestIndex(initialRect, intersectVector);
|
|
1144 |
case MovePageUp:
|
|
1145 |
rect.moveTop(rect.top() - d->viewport->height());
|
|
1146 |
if (rect.top() < rect.height())
|
|
1147 |
rect.moveTop(rect.height());
|
|
1148 |
case MovePrevious:
|
|
1149 |
case MoveUp:
|
|
1150 |
while (intersectVector.isEmpty()) {
|
|
1151 |
rect.translate(0, -rect.height());
|
|
1152 |
if (rect.bottom() <= 0) {
|
|
1153 |
#ifdef QT_KEYPAD_NAVIGATION
|
|
1154 |
if (QApplication::keypadNavigationEnabled()) {
|
|
1155 |
int row = d->batchStartRow() - 1;
|
|
1156 |
while (row >= 0 && d->isHiddenOrDisabled(row))
|
|
1157 |
--row;
|
|
1158 |
if (row >= 0)
|
|
1159 |
return d->model->index(row, d->column, d->root);
|
|
1160 |
}
|
|
1161 |
#endif
|
|
1162 |
return current;
|
|
1163 |
}
|
|
1164 |
if (rect.top() < 0)
|
|
1165 |
rect.setTop(0);
|
|
1166 |
intersectVector = d->intersectingSet(rect);
|
|
1167 |
d->removeCurrentAndDisabled(&intersectVector, current);
|
|
1168 |
}
|
|
1169 |
return d->closestIndex(initialRect, intersectVector);
|
|
1170 |
case MovePageDown:
|
|
1171 |
rect.moveTop(rect.top() + d->viewport->height());
|
|
1172 |
if (rect.bottom() > contents.height() - rect.height())
|
|
1173 |
rect.moveBottom(contents.height() - rect.height());
|
|
1174 |
case MoveNext:
|
|
1175 |
case MoveDown:
|
|
1176 |
while (intersectVector.isEmpty()) {
|
|
1177 |
rect.translate(0, rect.height());
|
|
1178 |
if (rect.top() >= contents.height()) {
|
|
1179 |
#ifdef QT_KEYPAD_NAVIGATION
|
|
1180 |
if (QApplication::keypadNavigationEnabled()) {
|
|
1181 |
int rowCount = d->model->rowCount(d->root);
|
|
1182 |
int row = 0;
|
|
1183 |
while (row < rowCount && d->isHiddenOrDisabled(row))
|
|
1184 |
++row;
|
|
1185 |
if (row < rowCount)
|
|
1186 |
return d->model->index(row, d->column, d->root);
|
|
1187 |
}
|
|
1188 |
#endif
|
|
1189 |
return current;
|
|
1190 |
}
|
|
1191 |
if (rect.bottom() > contents.height())
|
|
1192 |
rect.setBottom(contents.height());
|
|
1193 |
intersectVector = d->intersectingSet(rect);
|
|
1194 |
d->removeCurrentAndDisabled(&intersectVector, current);
|
|
1195 |
}
|
|
1196 |
return d->closestIndex(initialRect, intersectVector);
|
|
1197 |
case MoveHome:
|
|
1198 |
return d->model->index(0, d->column, d->root);
|
|
1199 |
case MoveEnd:
|
|
1200 |
return d->model->index(d->batchStartRow() - 1, d->column, d->root);}
|
|
1201 |
|
|
1202 |
return current;
|
|
1203 |
}
|
|
1204 |
|
|
1205 |
/*!
|
|
1206 |
Returns the rectangle of the item at position \a index in the
|
|
1207 |
model. The rectangle is in contents coordinates.
|
|
1208 |
|
|
1209 |
\sa visualRect()
|
|
1210 |
*/
|
|
1211 |
QRect QListView::rectForIndex(const QModelIndex &index) const
|
|
1212 |
{
|
|
1213 |
return d_func()->rectForIndex(index);
|
|
1214 |
}
|
|
1215 |
|
|
1216 |
/*!
|
|
1217 |
\since 4.1
|
|
1218 |
|
|
1219 |
Sets the contents position of the item at \a index in the model to the given
|
|
1220 |
\a position.
|
|
1221 |
If the list view's movement mode is Static or its view mode is ListView,
|
|
1222 |
this function will have no effect.
|
|
1223 |
*/
|
|
1224 |
void QListView::setPositionForIndex(const QPoint &position, const QModelIndex &index)
|
|
1225 |
{
|
|
1226 |
Q_D(QListView);
|
|
1227 |
if (d->movement == Static
|
|
1228 |
|| !d->isIndexValid(index)
|
|
1229 |
|| index.parent() != d->root
|
|
1230 |
|| index.column() != d->column)
|
|
1231 |
return;
|
|
1232 |
|
|
1233 |
d->executePostedLayout();
|
|
1234 |
d->commonListView->setPositionForIndex(position, index);
|
|
1235 |
}
|
|
1236 |
|
|
1237 |
/*!
|
|
1238 |
\reimp
|
|
1239 |
*/
|
|
1240 |
void QListView::setSelection(const QRect &rect, QItemSelectionModel::SelectionFlags command)
|
|
1241 |
{
|
|
1242 |
Q_D(QListView);
|
|
1243 |
if (!d->selectionModel)
|
|
1244 |
return;
|
|
1245 |
|
|
1246 |
// if we are wrapping, we can only selecte inside the contents rectangle
|
|
1247 |
int w = qMax(d->contentsSize().width(), d->viewport->width());
|
|
1248 |
int h = qMax(d->contentsSize().height(), d->viewport->height());
|
|
1249 |
if (d->wrap && !QRect(0, 0, w, h).intersects(rect))
|
|
1250 |
return;
|
|
1251 |
|
|
1252 |
QItemSelection selection;
|
|
1253 |
|
|
1254 |
if (rect.width() == 1 && rect.height() == 1) {
|
|
1255 |
const QVector<QModelIndex> intersectVector = d->intersectingSet(rect.translated(horizontalOffset(), verticalOffset()));
|
|
1256 |
QModelIndex tl;
|
|
1257 |
if (!intersectVector.isEmpty())
|
|
1258 |
tl = intersectVector.last(); // special case for mouse press; only select the top item
|
|
1259 |
if (tl.isValid() && d->isIndexEnabled(tl))
|
|
1260 |
selection.select(tl, tl);
|
|
1261 |
} else {
|
|
1262 |
if (state() == DragSelectingState) { // visual selection mode (rubberband selection)
|
|
1263 |
selection = d->selection(rect.translated(horizontalOffset(), verticalOffset()));
|
|
1264 |
} else { // logical selection mode (key and mouse click selection)
|
|
1265 |
QModelIndex tl, br;
|
|
1266 |
// get the first item
|
|
1267 |
const QRect topLeft(rect.left() + horizontalOffset(), rect.top() + verticalOffset(), 1, 1);
|
|
1268 |
QVector<QModelIndex> intersectVector = d->intersectingSet(topLeft);
|
|
1269 |
if (!intersectVector.isEmpty())
|
|
1270 |
tl = intersectVector.last();
|
|
1271 |
// get the last item
|
|
1272 |
const QRect bottomRight(rect.right() + horizontalOffset(), rect.bottom() + verticalOffset(), 1, 1);
|
|
1273 |
intersectVector = d->intersectingSet(bottomRight);
|
|
1274 |
if (!intersectVector.isEmpty())
|
|
1275 |
br = intersectVector.last();
|
|
1276 |
|
|
1277 |
// get the ranges
|
|
1278 |
if (tl.isValid() && br.isValid()
|
|
1279 |
&& d->isIndexEnabled(tl)
|
|
1280 |
&& d->isIndexEnabled(br)) {
|
|
1281 |
QRect first = rectForIndex(tl);
|
|
1282 |
QRect last = rectForIndex(br);
|
|
1283 |
QRect middle;
|
|
1284 |
if (d->flow == LeftToRight) {
|
|
1285 |
QRect &top = first;
|
|
1286 |
QRect &bottom = last;
|
|
1287 |
// if bottom is above top, swap them
|
|
1288 |
if (top.center().y() > bottom.center().y()) {
|
|
1289 |
QRect tmp = top;
|
|
1290 |
top = bottom;
|
|
1291 |
bottom = tmp;
|
|
1292 |
}
|
|
1293 |
// if the rect are on differnet lines, expand
|
|
1294 |
if (top.top() != bottom.top()) {
|
|
1295 |
// top rectangle
|
|
1296 |
if (isRightToLeft())
|
|
1297 |
top.setLeft(0);
|
|
1298 |
else
|
|
1299 |
top.setRight(contentsSize().width());
|
|
1300 |
// bottom rectangle
|
|
1301 |
if (isRightToLeft())
|
|
1302 |
bottom.setRight(contentsSize().width());
|
|
1303 |
else
|
|
1304 |
bottom.setLeft(0);
|
|
1305 |
} else if (top.left() > bottom.right()) {
|
|
1306 |
if (isRightToLeft())
|
|
1307 |
bottom.setLeft(top.right());
|
|
1308 |
else
|
|
1309 |
bottom.setRight(top.left());
|
|
1310 |
} else {
|
|
1311 |
if (isRightToLeft())
|
|
1312 |
top.setLeft(bottom.right());
|
|
1313 |
else
|
|
1314 |
top.setRight(bottom.left());
|
|
1315 |
}
|
|
1316 |
// middle rectangle
|
|
1317 |
if (top.bottom() < bottom.top()) {
|
|
1318 |
if (gridSize().isValid() && !gridSize().isNull())
|
|
1319 |
middle.setTop(top.top() + gridSize().height());
|
|
1320 |
else
|
|
1321 |
middle.setTop(top.bottom() + 1);
|
|
1322 |
middle.setLeft(qMin(top.left(), bottom.left()));
|
|
1323 |
middle.setBottom(bottom.top() - 1);
|
|
1324 |
middle.setRight(qMax(top.right(), bottom.right()));
|
|
1325 |
}
|
|
1326 |
} else { // TopToBottom
|
|
1327 |
QRect &left = first;
|
|
1328 |
QRect &right = last;
|
|
1329 |
if (left.center().x() > right.center().x())
|
|
1330 |
qSwap(left, right);
|
|
1331 |
|
|
1332 |
int ch = contentsSize().height();
|
|
1333 |
if (left.left() != right.left()) {
|
|
1334 |
// left rectangle
|
|
1335 |
if (isRightToLeft())
|
|
1336 |
left.setTop(0);
|
|
1337 |
else
|
|
1338 |
left.setBottom(ch);
|
|
1339 |
|
|
1340 |
// top rectangle
|
|
1341 |
if (isRightToLeft())
|
|
1342 |
right.setBottom(ch);
|
|
1343 |
else
|
|
1344 |
right.setTop(0);
|
|
1345 |
// only set middle if the
|
|
1346 |
middle.setTop(0);
|
|
1347 |
middle.setBottom(ch);
|
|
1348 |
if (gridSize().isValid() && !gridSize().isNull())
|
|
1349 |
middle.setLeft(left.left() + gridSize().width());
|
|
1350 |
else
|
|
1351 |
middle.setLeft(left.right() + 1);
|
|
1352 |
middle.setRight(right.left() - 1);
|
|
1353 |
} else if (left.bottom() < right.top()) {
|
|
1354 |
left.setBottom(right.top() - 1);
|
|
1355 |
} else {
|
|
1356 |
right.setBottom(left.top() - 1);
|
|
1357 |
}
|
|
1358 |
}
|
|
1359 |
|
|
1360 |
// do the selections
|
|
1361 |
QItemSelection topSelection = d->selection(first);
|
|
1362 |
QItemSelection middleSelection = d->selection(middle);
|
|
1363 |
QItemSelection bottomSelection = d->selection(last);
|
|
1364 |
// merge
|
|
1365 |
selection.merge(topSelection, QItemSelectionModel::Select);
|
|
1366 |
selection.merge(middleSelection, QItemSelectionModel::Select);
|
|
1367 |
selection.merge(bottomSelection, QItemSelectionModel::Select);
|
|
1368 |
}
|
|
1369 |
}
|
|
1370 |
}
|
|
1371 |
|
|
1372 |
d->selectionModel->select(selection, command);
|
|
1373 |
}
|
|
1374 |
|
|
1375 |
/*!
|
|
1376 |
\reimp
|
|
1377 |
*/
|
|
1378 |
QRegion QListView::visualRegionForSelection(const QItemSelection &selection) const
|
|
1379 |
{
|
|
1380 |
Q_D(const QListView);
|
|
1381 |
// ### NOTE: this is a potential bottleneck in non-static mode
|
|
1382 |
int c = d->column;
|
|
1383 |
QRegion selectionRegion;
|
|
1384 |
for (int i = 0; i < selection.count(); ++i) {
|
|
1385 |
if (!selection.at(i).isValid())
|
|
1386 |
continue;
|
|
1387 |
QModelIndex parent = selection.at(i).topLeft().parent();
|
|
1388 |
//we only display the children of the root in a listview
|
|
1389 |
//we're not interested in the other model indexes
|
|
1390 |
if (parent != d->root)
|
|
1391 |
continue;
|
|
1392 |
int t = selection.at(i).topLeft().row();
|
|
1393 |
int b = selection.at(i).bottomRight().row();
|
|
1394 |
if (d->viewMode == IconMode || d->isWrapping()) { // in non-static mode, we have to go through all selected items
|
|
1395 |
for (int r = t; r <= b; ++r)
|
|
1396 |
selectionRegion += QRegion(visualRect(d->model->index(r, c, parent)));
|
|
1397 |
} else { // in static mode, we can optimize a bit
|
|
1398 |
while (t <= b && d->isHidden(t)) ++t;
|
|
1399 |
while (b >= t && d->isHidden(b)) --b;
|
|
1400 |
const QModelIndex top = d->model->index(t, c, parent);
|
|
1401 |
const QModelIndex bottom = d->model->index(b, c, parent);
|
|
1402 |
QRect rect(visualRect(top).topLeft(),
|
|
1403 |
visualRect(bottom).bottomRight());
|
|
1404 |
selectionRegion += QRegion(rect);
|
|
1405 |
}
|
|
1406 |
}
|
|
1407 |
|
|
1408 |
return selectionRegion;
|
|
1409 |
}
|
|
1410 |
|
|
1411 |
/*!
|
|
1412 |
\reimp
|
|
1413 |
*/
|
|
1414 |
QModelIndexList QListView::selectedIndexes() const
|
|
1415 |
{
|
|
1416 |
Q_D(const QListView);
|
|
1417 |
if (!d->selectionModel)
|
|
1418 |
return QModelIndexList();
|
|
1419 |
|
|
1420 |
QModelIndexList viewSelected = d->selectionModel->selectedIndexes();
|
|
1421 |
for (int i = 0; i < viewSelected.count(); ++i) {
|
|
1422 |
const QModelIndex &index = viewSelected.at(i);
|
|
1423 |
if (!isIndexHidden(index) && index.parent() == d->root && index.column() == d->column)
|
|
1424 |
++i;
|
|
1425 |
else
|
|
1426 |
viewSelected.removeAt(i);
|
|
1427 |
}
|
|
1428 |
return viewSelected;
|
|
1429 |
}
|
|
1430 |
|
|
1431 |
/*!
|
|
1432 |
\internal
|
|
1433 |
|
|
1434 |
Layout the items according to the flow and wrapping properties.
|
|
1435 |
*/
|
|
1436 |
void QListView::doItemsLayout()
|
|
1437 |
{
|
|
1438 |
Q_D(QListView);
|
|
1439 |
// showing the scroll bars will trigger a resize event,
|
|
1440 |
// so we set the state to expanding to avoid
|
|
1441 |
// triggering another layout
|
|
1442 |
QAbstractItemView::State oldState = state();
|
|
1443 |
setState(ExpandingState);
|
|
1444 |
if (d->model->columnCount(d->root) > 0) { // no columns means no contents
|
|
1445 |
d->resetBatchStartRow();
|
|
1446 |
if (layoutMode() == SinglePass)
|
|
1447 |
d->doItemsLayout(d->model->rowCount(d->root)); // layout everything
|
|
1448 |
else if (!d->batchLayoutTimer.isActive()) {
|
|
1449 |
if (!d->doItemsLayout(d->batchSize)) // layout is done
|
|
1450 |
d->batchLayoutTimer.start(0, this); // do a new batch as fast as possible
|
|
1451 |
}
|
|
1452 |
}
|
|
1453 |
QAbstractItemView::doItemsLayout();
|
|
1454 |
setState(oldState); // restoring the oldState
|
|
1455 |
}
|
|
1456 |
|
|
1457 |
/*!
|
|
1458 |
\reimp
|
|
1459 |
*/
|
|
1460 |
void QListView::updateGeometries()
|
|
1461 |
{
|
|
1462 |
Q_D(QListView);
|
|
1463 |
if (d->model->rowCount(d->root) <= 0 || d->model->columnCount(d->root) <= 0) {
|
|
1464 |
horizontalScrollBar()->setRange(0, 0);
|
|
1465 |
verticalScrollBar()->setRange(0, 0);
|
|
1466 |
} else {
|
|
1467 |
QModelIndex index = d->model->index(0, d->column, d->root);
|
|
1468 |
QStyleOptionViewItemV4 option = d->viewOptionsV4();
|
|
1469 |
QSize step = d->itemSize(option, index);
|
|
1470 |
d->commonListView->updateHorizontalScrollBar(step);
|
|
1471 |
d->commonListView->updateVerticalScrollBar(step);
|
|
1472 |
}
|
|
1473 |
|
|
1474 |
QAbstractItemView::updateGeometries();
|
|
1475 |
|
|
1476 |
// if the scroll bars are turned off, we resize the contents to the viewport
|
|
1477 |
if (d->movement == Static && !d->isWrapping()) {
|
|
1478 |
d->layoutChildren(); // we need the viewport size to be updated
|
|
1479 |
if (d->flow == TopToBottom) {
|
|
1480 |
if (horizontalScrollBarPolicy() == Qt::ScrollBarAlwaysOff) {
|
|
1481 |
d->setContentsSize(viewport()->width(), contentsSize().height());
|
|
1482 |
horizontalScrollBar()->setRange(0, 0); // we see all the contents anyway
|
|
1483 |
}
|
|
1484 |
} else { // LeftToRight
|
|
1485 |
if (verticalScrollBarPolicy() == Qt::ScrollBarAlwaysOff) {
|
|
1486 |
d->setContentsSize(contentsSize().width(), viewport()->height());
|
|
1487 |
verticalScrollBar()->setRange(0, 0); // we see all the contents anyway
|
|
1488 |
}
|
|
1489 |
}
|
|
1490 |
}
|
|
1491 |
}
|
|
1492 |
|
|
1493 |
/*!
|
|
1494 |
\reimp
|
|
1495 |
*/
|
|
1496 |
bool QListView::isIndexHidden(const QModelIndex &index) const
|
|
1497 |
{
|
|
1498 |
Q_D(const QListView);
|
|
1499 |
return (d->isHidden(index.row())
|
|
1500 |
&& (index.parent() == d->root)
|
|
1501 |
&& index.column() == d->column);
|
|
1502 |
}
|
|
1503 |
|
|
1504 |
/*!
|
|
1505 |
\property QListView::modelColumn
|
|
1506 |
\brief the column in the model that is visible
|
|
1507 |
|
|
1508 |
By default, this property contains 0, indicating that the first
|
|
1509 |
column in the model will be shown.
|
|
1510 |
*/
|
|
1511 |
void QListView::setModelColumn(int column)
|
|
1512 |
{
|
|
1513 |
Q_D(QListView);
|
|
1514 |
if (column < 0 || column >= d->model->columnCount(d->root))
|
|
1515 |
return;
|
|
1516 |
d->column = column;
|
|
1517 |
d->doDelayedItemsLayout();
|
|
1518 |
}
|
|
1519 |
|
|
1520 |
int QListView::modelColumn() const
|
|
1521 |
{
|
|
1522 |
Q_D(const QListView);
|
|
1523 |
return d->column;
|
|
1524 |
}
|
|
1525 |
|
|
1526 |
/*!
|
|
1527 |
\property QListView::uniformItemSizes
|
|
1528 |
\brief whether all items in the listview have the same size
|
|
1529 |
\since 4.1
|
|
1530 |
|
|
1531 |
This property should only be set to true if it is guaranteed that all items
|
|
1532 |
in the view have the same size. This enables the view to do some
|
|
1533 |
optimizations for performance purposes.
|
|
1534 |
|
|
1535 |
By default, this property is false.
|
|
1536 |
*/
|
|
1537 |
void QListView::setUniformItemSizes(bool enable)
|
|
1538 |
{
|
|
1539 |
Q_D(QListView);
|
|
1540 |
d->uniformItemSizes = enable;
|
|
1541 |
}
|
|
1542 |
|
|
1543 |
bool QListView::uniformItemSizes() const
|
|
1544 |
{
|
|
1545 |
Q_D(const QListView);
|
|
1546 |
return d->uniformItemSizes;
|
|
1547 |
}
|
|
1548 |
|
|
1549 |
/*!
|
|
1550 |
\property QListView::wordWrap
|
|
1551 |
\brief the item text word-wrapping policy
|
|
1552 |
\since 4.2
|
|
1553 |
|
|
1554 |
If this property is true then the item text is wrapped where
|
|
1555 |
necessary at word-breaks; otherwise it is not wrapped at all.
|
|
1556 |
This property is false by default.
|
|
1557 |
|
|
1558 |
Please note that even if wrapping is enabled, the cell will not be
|
|
1559 |
expanded to make room for the text. It will print ellipsis for
|
|
1560 |
text that cannot be shown, according to the view's
|
|
1561 |
\l{QAbstractItemView::}{textElideMode}.
|
|
1562 |
*/
|
|
1563 |
void QListView::setWordWrap(bool on)
|
|
1564 |
{
|
|
1565 |
Q_D(QListView);
|
|
1566 |
if (d->wrapItemText == on)
|
|
1567 |
return;
|
|
1568 |
d->wrapItemText = on;
|
|
1569 |
d->doDelayedItemsLayout();
|
|
1570 |
}
|
|
1571 |
|
|
1572 |
bool QListView::wordWrap() const
|
|
1573 |
{
|
|
1574 |
Q_D(const QListView);
|
|
1575 |
return d->wrapItemText;
|
|
1576 |
}
|
|
1577 |
|
|
1578 |
/*!
|
|
1579 |
\property QListView::selectionRectVisible
|
|
1580 |
\brief if the selection rectangle should be visible
|
|
1581 |
\since 4.3
|
|
1582 |
|
|
1583 |
If this property is true then the selection rectangle is visible;
|
|
1584 |
otherwise it will be hidden.
|
|
1585 |
|
|
1586 |
\note The selection rectangle will only be visible if the selection mode
|
|
1587 |
is in a mode where more than one item can be selected; i.e., it will not
|
|
1588 |
draw a selection rectangle if the selection mode is
|
|
1589 |
QAbstractItemView::SingleSelection.
|
|
1590 |
|
|
1591 |
By default, this property is false.
|
|
1592 |
*/
|
|
1593 |
void QListView::setSelectionRectVisible(bool show)
|
|
1594 |
{
|
|
1595 |
Q_D(QListView);
|
|
1596 |
d->modeProperties |= uint(QListViewPrivate::SelectionRectVisible);
|
|
1597 |
d->setSelectionRectVisible(show);
|
|
1598 |
}
|
|
1599 |
|
|
1600 |
bool QListView::isSelectionRectVisible() const
|
|
1601 |
{
|
|
1602 |
Q_D(const QListView);
|
|
1603 |
return d->isSelectionRectVisible();
|
|
1604 |
}
|
|
1605 |
|
|
1606 |
/*!
|
|
1607 |
\reimp
|
|
1608 |
*/
|
|
1609 |
bool QListView::event(QEvent *e)
|
|
1610 |
{
|
|
1611 |
return QAbstractItemView::event(e);
|
|
1612 |
}
|
|
1613 |
|
|
1614 |
/*
|
|
1615 |
* private object implementation
|
|
1616 |
*/
|
|
1617 |
|
|
1618 |
QListViewPrivate::QListViewPrivate()
|
|
1619 |
: QAbstractItemViewPrivate(),
|
|
1620 |
commonListView(0),
|
|
1621 |
wrap(false),
|
|
1622 |
space(0),
|
|
1623 |
flow(QListView::TopToBottom),
|
|
1624 |
movement(QListView::Static),
|
|
1625 |
resizeMode(QListView::Fixed),
|
|
1626 |
layoutMode(QListView::SinglePass),
|
|
1627 |
viewMode(QListView::ListMode),
|
|
1628 |
modeProperties(0),
|
|
1629 |
column(0),
|
|
1630 |
uniformItemSizes(false),
|
|
1631 |
batchSize(100),
|
|
1632 |
showElasticBand(false)
|
|
1633 |
{
|
|
1634 |
}
|
|
1635 |
|
|
1636 |
QListViewPrivate::~QListViewPrivate()
|
|
1637 |
{
|
|
1638 |
delete commonListView;
|
|
1639 |
}
|
|
1640 |
|
|
1641 |
void QListViewPrivate::clear()
|
|
1642 |
{
|
|
1643 |
// initialization of data structs
|
|
1644 |
cachedItemSize = QSize();
|
|
1645 |
commonListView->clear();
|
|
1646 |
}
|
|
1647 |
|
|
1648 |
void QListViewPrivate::prepareItemsLayout()
|
|
1649 |
{
|
|
1650 |
Q_Q(QListView);
|
|
1651 |
clear();
|
|
1652 |
|
|
1653 |
//take the size as if there were scrollbar in order to prevent scrollbar to blink
|
|
1654 |
layoutBounds = QRect(QPoint(), q->maximumViewportSize());
|
|
1655 |
|
|
1656 |
int frameAroundContents = 0;
|
|
1657 |
if (q->style()->styleHint(QStyle::SH_ScrollView_FrameOnlyAroundContents))
|
|
1658 |
frameAroundContents = q->style()->pixelMetric(QStyle::PM_DefaultFrameWidth) * 2;
|
|
1659 |
|
|
1660 |
// maximumViewportSize() already takes scrollbar into account if policy is
|
|
1661 |
// Qt::ScrollBarAlwaysOn but scrollbar extent must be deduced if policy
|
|
1662 |
// is Qt::ScrollBarAsNeeded
|
|
1663 |
int verticalMargin = vbarpolicy==Qt::ScrollBarAsNeeded
|
|
1664 |
? q->style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, vbar) + frameAroundContents
|
|
1665 |
: 0;
|
|
1666 |
int horizontalMargin = hbarpolicy==Qt::ScrollBarAsNeeded
|
|
1667 |
? q->style()->pixelMetric(QStyle::PM_ScrollBarExtent, 0, hbar) + frameAroundContents
|
|
1668 |
: 0;
|
|
1669 |
|
|
1670 |
layoutBounds.adjust(0, 0, -verticalMargin, -horizontalMargin);
|
|
1671 |
|
|
1672 |
int rowCount = model->columnCount(root) <= 0 ? 0 : model->rowCount(root);
|
|
1673 |
commonListView->setRowCount(rowCount);
|
|
1674 |
}
|
|
1675 |
|
|
1676 |
/*!
|
|
1677 |
\internal
|
|
1678 |
*/
|
|
1679 |
bool QListViewPrivate::doItemsLayout(int delta)
|
|
1680 |
{
|
|
1681 |
int max = model->rowCount(root) - 1;
|
|
1682 |
int first = batchStartRow();
|
|
1683 |
int last = qMin(first + delta - 1, max);
|
|
1684 |
|
|
1685 |
if (first == 0) {
|
|
1686 |
layoutChildren(); // make sure the viewport has the right size
|
|
1687 |
prepareItemsLayout();
|
|
1688 |
}
|
|
1689 |
|
|
1690 |
if (max < 0 || last < first) {
|
|
1691 |
return true; // nothing to do
|
|
1692 |
}
|
|
1693 |
|
|
1694 |
QListViewLayoutInfo info;
|
|
1695 |
info.bounds = layoutBounds;
|
|
1696 |
info.grid = gridSize();
|
|
1697 |
info.spacing = (info.grid.isValid() ? 0 : spacing());
|
|
1698 |
info.first = first;
|
|
1699 |
info.last = last;
|
|
1700 |
info.wrap = isWrapping();
|
|
1701 |
info.flow = flow;
|
|
1702 |
info.max = max;
|
|
1703 |
|
|
1704 |
return commonListView->doBatchedItemLayout(info, max);
|
|
1705 |
}
|
|
1706 |
|
|
1707 |
QListViewItem QListViewPrivate::indexToListViewItem(const QModelIndex &index) const
|
|
1708 |
{
|
|
1709 |
if (!index.isValid() || isHidden(index.row()))
|
|
1710 |
return QListViewItem();
|
|
1711 |
|
|
1712 |
return commonListView->indexToListViewItem(index);
|
|
1713 |
}
|
|
1714 |
|
|
1715 |
QRect QListViewPrivate::mapToViewport(const QRect &rect, bool extend) const
|
|
1716 |
{
|
|
1717 |
Q_Q(const QListView);
|
|
1718 |
if (!rect.isValid())
|
|
1719 |
return rect;
|
|
1720 |
|
|
1721 |
QRect result = extend ? commonListView->mapToViewport(rect) : rect;
|
|
1722 |
int dx = -q->horizontalOffset();
|
|
1723 |
int dy = -q->verticalOffset();
|
|
1724 |
return result.adjusted(dx, dy, dx, dy);
|
|
1725 |
}
|
|
1726 |
|
|
1727 |
QModelIndex QListViewPrivate::closestIndex(const QRect &target,
|
|
1728 |
const QVector<QModelIndex> &candidates) const
|
|
1729 |
{
|
|
1730 |
int distance = 0;
|
|
1731 |
int shortest = INT_MAX;
|
|
1732 |
QModelIndex closest;
|
|
1733 |
QVector<QModelIndex>::const_iterator it = candidates.begin();
|
|
1734 |
|
|
1735 |
for (; it != candidates.end(); ++it) {
|
|
1736 |
if (!(*it).isValid())
|
|
1737 |
continue;
|
|
1738 |
|
|
1739 |
const QRect indexRect = indexToListViewItem(*it).rect();
|
|
1740 |
|
|
1741 |
//if the center x (or y) position of an item is included in the rect of the other item,
|
|
1742 |
//we define the distance between them as the difference in x (or y) of their respective center.
|
|
1743 |
// Otherwise, we use the nahattan length between the 2 items
|
|
1744 |
if ((target.center().x() >= indexRect.x() && target.center().x() < indexRect.right())
|
|
1745 |
|| (indexRect.center().x() >= target.x() && indexRect.center().x() < target.right())) {
|
|
1746 |
//one item's center is at the vertical of the other
|
|
1747 |
distance = qAbs(indexRect.center().y() - target.center().y());
|
|
1748 |
} else if ((target.center().y() >= indexRect.y() && target.center().y() < indexRect.bottom())
|
|
1749 |
|| (indexRect.center().y() >= target.y() && indexRect.center().y() < target.bottom())) {
|
|
1750 |
//one item's center is at the vertical of the other
|
|
1751 |
distance = qAbs(indexRect.center().x() - target.center().x());
|
|
1752 |
} else {
|
|
1753 |
distance = (indexRect.center() - target.center()).manhattanLength();
|
|
1754 |
}
|
|
1755 |
if (distance < shortest) {
|
|
1756 |
shortest = distance;
|
|
1757 |
closest = *it;
|
|
1758 |
}
|
|
1759 |
}
|
|
1760 |
return closest;
|
|
1761 |
}
|
|
1762 |
|
|
1763 |
QSize QListViewPrivate::itemSize(const QStyleOptionViewItem &option, const QModelIndex &index) const
|
|
1764 |
{
|
|
1765 |
if (!uniformItemSizes) {
|
|
1766 |
const QAbstractItemDelegate *delegate = delegateForIndex(index);
|
|
1767 |
return delegate ? delegate->sizeHint(option, index) : QSize();
|
|
1768 |
}
|
|
1769 |
if (!cachedItemSize.isValid()) { // the last item is probaly the largest, so we use its size
|
|
1770 |
int row = model->rowCount(root) - 1;
|
|
1771 |
QModelIndex sample = model->index(row, column, root);
|
|
1772 |
const QAbstractItemDelegate *delegate = delegateForIndex(sample);
|
|
1773 |
cachedItemSize = delegate ? delegate->sizeHint(option, sample) : QSize();
|
|
1774 |
}
|
|
1775 |
return cachedItemSize;
|
|
1776 |
}
|
|
1777 |
|
|
1778 |
QItemSelection QListViewPrivate::selection(const QRect &rect) const
|
|
1779 |
{
|
|
1780 |
QItemSelection selection;
|
|
1781 |
QModelIndex tl, br;
|
|
1782 |
const QVector<QModelIndex> intersectVector = intersectingSet(rect);
|
|
1783 |
QVector<QModelIndex>::const_iterator it = intersectVector.begin();
|
|
1784 |
for (; it != intersectVector.end(); ++it) {
|
|
1785 |
if (!tl.isValid() && !br.isValid()) {
|
|
1786 |
tl = br = *it;
|
|
1787 |
} else if ((*it).row() == (tl.row() - 1)) {
|
|
1788 |
tl = *it; // expand current range
|
|
1789 |
} else if ((*it).row() == (br.row() + 1)) {
|
|
1790 |
br = (*it); // expand current range
|
|
1791 |
} else {
|
|
1792 |
selection.select(tl, br); // select current range
|
|
1793 |
tl = br = *it; // start new range
|
|
1794 |
}
|
|
1795 |
}
|
|
1796 |
|
|
1797 |
if (tl.isValid() && br.isValid())
|
|
1798 |
selection.select(tl, br);
|
|
1799 |
else if (tl.isValid())
|
|
1800 |
selection.select(tl, tl);
|
|
1801 |
else if (br.isValid())
|
|
1802 |
selection.select(br, br);
|
|
1803 |
|
|
1804 |
return selection;
|
|
1805 |
}
|
|
1806 |
|
|
1807 |
/*
|
|
1808 |
* Common ListView Implementation
|
|
1809 |
*/
|
|
1810 |
|
|
1811 |
void QCommonListViewBase::appendHiddenRow(int row)
|
|
1812 |
{
|
|
1813 |
dd->hiddenRows.append(dd->model->index(row, 0, qq->rootIndex()));
|
|
1814 |
}
|
|
1815 |
|
|
1816 |
void QCommonListViewBase::removeHiddenRow(int row)
|
|
1817 |
{
|
|
1818 |
dd->hiddenRows.remove(dd->hiddenRows.indexOf(dd->model->index(row, 0, qq->rootIndex())));
|
|
1819 |
}
|
|
1820 |
|
|
1821 |
void QCommonListViewBase::updateHorizontalScrollBar(const QSize &step)
|
|
1822 |
{
|
|
1823 |
horizontalScrollBar()->setSingleStep(step.width() + spacing());
|
|
1824 |
horizontalScrollBar()->setPageStep(viewport()->width());
|
|
1825 |
horizontalScrollBar()->setRange(0, contentsSize.width() - viewport()->width());
|
|
1826 |
}
|
|
1827 |
|
|
1828 |
void QCommonListViewBase::updateVerticalScrollBar(const QSize &step)
|
|
1829 |
{
|
|
1830 |
verticalScrollBar()->setSingleStep(step.height() + spacing());
|
|
1831 |
verticalScrollBar()->setPageStep(viewport()->height());
|
|
1832 |
verticalScrollBar()->setRange(0, contentsSize.height() - viewport()->height());
|
|
1833 |
}
|
|
1834 |
|
|
1835 |
void QCommonListViewBase::scrollContentsBy(int dx, int dy, bool /*scrollElasticBand*/)
|
|
1836 |
{
|
|
1837 |
dd->scrollContentsBy(isRightToLeft() ? -dx : dx, dy);
|
|
1838 |
}
|
|
1839 |
|
|
1840 |
int QCommonListViewBase::verticalScrollToValue(int /*index*/, QListView::ScrollHint hint,
|
|
1841 |
bool above, bool below, const QRect &area, const QRect &rect) const
|
|
1842 |
{
|
|
1843 |
int verticalValue = verticalScrollBar()->value();
|
|
1844 |
QRect adjusted = rect.adjusted(-spacing(), -spacing(), spacing(), spacing());
|
|
1845 |
if (hint == QListView::PositionAtTop || above)
|
|
1846 |
verticalValue += adjusted.top();
|
|
1847 |
else if (hint == QListView::PositionAtBottom || below)
|
|
1848 |
verticalValue += qMin(adjusted.top(), adjusted.bottom() - area.height() + 1);
|
|
1849 |
else if (hint == QListView::PositionAtCenter)
|
|
1850 |
verticalValue += adjusted.top() - ((area.height() - adjusted.height()) / 2);
|
|
1851 |
return verticalValue;
|
|
1852 |
}
|
|
1853 |
|
|
1854 |
int QCommonListViewBase::horizontalOffset() const
|
|
1855 |
{
|
|
1856 |
return (isRightToLeft() ? horizontalScrollBar()->maximum() - horizontalScrollBar()->value() : horizontalScrollBar()->value());
|
|
1857 |
}
|
|
1858 |
|
|
1859 |
int QCommonListViewBase::horizontalScrollToValue(const int /*index*/, QListView::ScrollHint hint,
|
|
1860 |
bool leftOf, bool rightOf, const QRect &area, const QRect &rect) const
|
|
1861 |
{
|
|
1862 |
int horizontalValue = horizontalScrollBar()->value();
|
|
1863 |
if (isRightToLeft()) {
|
|
1864 |
if (hint == QListView::PositionAtCenter) {
|
|
1865 |
horizontalValue += ((area.width() - rect.width()) / 2) - rect.left();
|
|
1866 |
} else {
|
|
1867 |
if (leftOf)
|
|
1868 |
horizontalValue -= rect.left();
|
|
1869 |
else if (rightOf)
|
|
1870 |
horizontalValue += qMin(rect.left(), area.width() - rect.right());
|
|
1871 |
}
|
|
1872 |
} else {
|
|
1873 |
if (hint == QListView::PositionAtCenter) {
|
|
1874 |
horizontalValue += rect.left() - ((area.width()- rect.width()) / 2);
|
|
1875 |
} else {
|
|
1876 |
if (leftOf)
|
|
1877 |
horizontalValue += rect.left();
|
|
1878 |
else if (rightOf)
|
|
1879 |
horizontalValue += qMin(rect.left(), rect.right() - area.width());
|
|
1880 |
}
|
|
1881 |
}
|
|
1882 |
return horizontalValue;
|
|
1883 |
}
|
|
1884 |
|
|
1885 |
/*
|
|
1886 |
* ListMode ListView Implementation
|
|
1887 |
*/
|
|
1888 |
|
|
1889 |
#ifndef QT_NO_DRAGANDDROP
|
|
1890 |
void QListModeViewBase::paintDragDrop(QPainter *painter)
|
|
1891 |
{
|
|
1892 |
// FIXME: Until the we can provide a proper drop indicator
|
|
1893 |
// in IconMode, it makes no sense to show it
|
|
1894 |
dd->paintDropIndicator(painter);
|
|
1895 |
}
|
|
1896 |
#endif //QT_NO_DRAGANDDROP
|
|
1897 |
|
|
1898 |
void QListModeViewBase::updateVerticalScrollBar(const QSize &step)
|
|
1899 |
{
|
|
1900 |
if (verticalScrollMode() == QAbstractItemView::ScrollPerItem
|
|
1901 |
&& ((flow() == QListView::TopToBottom && !isWrapping())
|
|
1902 |
|| (flow() == QListView::LeftToRight && isWrapping()))) {
|
|
1903 |
const int steps = (flow() == QListView::TopToBottom ? scrollValueMap : segmentPositions).count() - 1;
|
|
1904 |
if (steps > 0) {
|
|
1905 |
const int pageSteps = perItemScrollingPageSteps(viewport()->height(), contentsSize.height(), isWrapping());
|
|
1906 |
verticalScrollBar()->setSingleStep(1);
|
|
1907 |
verticalScrollBar()->setPageStep(pageSteps);
|
|
1908 |
verticalScrollBar()->setRange(0, steps - pageSteps);
|
|
1909 |
} else {
|
|
1910 |
verticalScrollBar()->setRange(0, 0);
|
|
1911 |
}
|
|
1912 |
// } else if (vertical && d->isWrapping() && d->movement == Static) {
|
|
1913 |
// ### wrapped scrolling in flow direction
|
|
1914 |
} else {
|
|
1915 |
QCommonListViewBase::updateVerticalScrollBar(step);
|
|
1916 |
}
|
|
1917 |
}
|
|
1918 |
|
|
1919 |
void QListModeViewBase::updateHorizontalScrollBar(const QSize &step)
|
|
1920 |
{
|
|
1921 |
if (horizontalScrollMode() == QAbstractItemView::ScrollPerItem
|
|
1922 |
&& ((flow() == QListView::TopToBottom && isWrapping())
|
|
1923 |
|| (flow() == QListView::LeftToRight && !isWrapping()))) {
|
|
1924 |
int steps = (flow() == QListView::TopToBottom ? segmentPositions : scrollValueMap).count() - 1;
|
|
1925 |
if (steps > 0) {
|
|
1926 |
const int pageSteps = perItemScrollingPageSteps(viewport()->width(), contentsSize.width(), isWrapping());
|
|
1927 |
horizontalScrollBar()->setSingleStep(1);
|
|
1928 |
horizontalScrollBar()->setPageStep(pageSteps);
|
|
1929 |
horizontalScrollBar()->setRange(0, steps - pageSteps);
|
|
1930 |
} else {
|
|
1931 |
horizontalScrollBar()->setRange(0, 0);
|
|
1932 |
}
|
|
1933 |
} else {
|
|
1934 |
QCommonListViewBase::updateHorizontalScrollBar(step);
|
|
1935 |
}
|
|
1936 |
}
|
|
1937 |
|
|
1938 |
int QListModeViewBase::verticalScrollToValue(int index, QListView::ScrollHint hint,
|
|
1939 |
bool above, bool below, const QRect &area, const QRect &rect) const
|
|
1940 |
{
|
|
1941 |
if (verticalScrollMode() == QAbstractItemView::ScrollPerItem) {
|
|
1942 |
int value;
|
|
1943 |
if (scrollValueMap.isEmpty())
|
|
1944 |
value = 0;
|
|
1945 |
else
|
|
1946 |
value = qBound(0, scrollValueMap.at(verticalScrollBar()->value()), flowPositions.count() - 1);
|
|
1947 |
if (above)
|
|
1948 |
hint = QListView::PositionAtTop;
|
|
1949 |
else if (below)
|
|
1950 |
hint = QListView::PositionAtBottom;
|
|
1951 |
if (hint == QListView::EnsureVisible)
|
|
1952 |
return value;
|
|
1953 |
|
|
1954 |
return perItemScrollToValue(index, value, area.height(), hint, Qt::Vertical, isWrapping(), rect.height());
|
|
1955 |
}
|
|
1956 |
|
|
1957 |
return QCommonListViewBase::verticalScrollToValue(index, hint, above, below, area, rect);
|
|
1958 |
}
|
|
1959 |
|
|
1960 |
int QListModeViewBase::horizontalOffset() const
|
|
1961 |
{
|
|
1962 |
if (horizontalScrollMode() == QAbstractItemView::ScrollPerItem) {
|
|
1963 |
if (isWrapping()) {
|
|
1964 |
if (flow() == QListView::TopToBottom && !segmentPositions.isEmpty()) {
|
|
1965 |
const int max = segmentPositions.count() - 1;
|
|
1966 |
int currentValue = qBound(0, horizontalScrollBar()->value(), max);
|
|
1967 |
int position = segmentPositions.at(currentValue);
|
|
1968 |
int maximumValue = qBound(0, horizontalScrollBar()->maximum(), max);
|
|
1969 |
int maximum = segmentPositions.at(maximumValue);
|
|
1970 |
return (isRightToLeft() ? maximum - position : position);
|
|
1971 |
}
|
|
1972 |
} else if (flow() == QListView::LeftToRight && !flowPositions.isEmpty()) {
|
|
1973 |
int position = flowPositions.at(scrollValueMap.at(horizontalScrollBar()->value()));
|
|
1974 |
int maximum = flowPositions.at(scrollValueMap.at(horizontalScrollBar()->maximum()));
|
|
1975 |
return (isRightToLeft() ? maximum - position : position);
|
|
1976 |
}
|
|
1977 |
}
|
|
1978 |
return QCommonListViewBase::horizontalOffset();
|
|
1979 |
}
|
|
1980 |
|
|
1981 |
int QListModeViewBase::verticalOffset() const
|
|
1982 |
{
|
|
1983 |
if (verticalScrollMode() == QAbstractItemView::ScrollPerItem) {
|
|
1984 |
if (isWrapping()) {
|
|
1985 |
if (flow() == QListView::LeftToRight && !segmentPositions.isEmpty()) {
|
|
1986 |
int value = verticalScrollBar()->value();
|
|
1987 |
if (value >= segmentPositions.count())
|
|
1988 |
return 0;
|
|
1989 |
return segmentPositions.at(value);
|
|
1990 |
}
|
|
1991 |
} else if (flow() == QListView::TopToBottom && !flowPositions.isEmpty()) {
|
|
1992 |
int value = verticalScrollBar()->value();
|
|
1993 |
if (value > scrollValueMap.count())
|
|
1994 |
return 0;
|
|
1995 |
return flowPositions.at(scrollValueMap.at(value)) - spacing();
|
|
1996 |
}
|
|
1997 |
}
|
|
1998 |
return QCommonListViewBase::verticalOffset();
|
|
1999 |
}
|
|
2000 |
|
|
2001 |
int QListModeViewBase::horizontalScrollToValue(int index, QListView::ScrollHint hint,
|
|
2002 |
bool leftOf, bool rightOf, const QRect &area, const QRect &rect) const
|
|
2003 |
{
|
|
2004 |
if (horizontalScrollMode() != QAbstractItemView::ScrollPerItem)
|
|
2005 |
return QCommonListViewBase::horizontalScrollToValue(index, hint, leftOf, rightOf, area, rect);
|
|
2006 |
|
|
2007 |
int value;
|
|
2008 |
if (scrollValueMap.isEmpty())
|
|
2009 |
value = 0;
|
|
2010 |
else
|
|
2011 |
value = qBound(0, scrollValueMap.at(horizontalScrollBar()->value()), flowPositions.count() - 1);
|
|
2012 |
if (leftOf)
|
|
2013 |
hint = QListView::PositionAtTop;
|
|
2014 |
else if (rightOf)
|
|
2015 |
hint = QListView::PositionAtBottom;
|
|
2016 |
if (hint == QListView::EnsureVisible)
|
|
2017 |
return value;
|
|
2018 |
|
|
2019 |
return perItemScrollToValue(index, value, area.width(), hint, Qt::Horizontal, isWrapping(), rect.width());
|
|
2020 |
}
|
|
2021 |
|
|
2022 |
void QListModeViewBase::scrollContentsBy(int dx, int dy, bool scrollElasticBand)
|
|
2023 |
{
|
|
2024 |
// ### reorder this logic
|
|
2025 |
const int verticalValue = verticalScrollBar()->value();
|
|
2026 |
const int horizontalValue = horizontalScrollBar()->value();
|
|
2027 |
const bool vertical = (verticalScrollMode() == QAbstractItemView::ScrollPerItem);
|
|
2028 |
const bool horizontal = (horizontalScrollMode() == QAbstractItemView::ScrollPerItem);
|
|
2029 |
|
|
2030 |
if (isWrapping()) {
|
|
2031 |
if (segmentPositions.isEmpty())
|
|
2032 |
return;
|
|
2033 |
const int max = segmentPositions.count() - 1;
|
|
2034 |
if (horizontal && flow() == QListView::TopToBottom && dx != 0) {
|
|
2035 |
int currentValue = qBound(0, horizontalValue, max);
|
|
2036 |
int previousValue = qBound(0, currentValue + dx, max);
|
|
2037 |
int currentCoordinate = segmentPositions.at(currentValue);
|
|
2038 |
int previousCoordinate = segmentPositions.at(previousValue);
|
|
2039 |
dx = previousCoordinate - currentCoordinate;
|
|
2040 |
} else if (vertical && flow() == QListView::LeftToRight && dy != 0) {
|
|
2041 |
int currentValue = qBound(0, verticalValue, max);
|
|
2042 |
int previousValue = qBound(0, currentValue + dy, max);
|
|
2043 |
int currentCoordinate = segmentPositions.at(currentValue);
|
|
2044 |
int previousCoordinate = segmentPositions.at(previousValue);
|
|
2045 |
dy = previousCoordinate - currentCoordinate;
|
|
2046 |
}
|
|
2047 |
} else {
|
|
2048 |
if (flowPositions.isEmpty())
|
|
2049 |
return;
|
|
2050 |
const int max = flowPositions.count() - 1;
|
|
2051 |
if (vertical && flow() == QListView::TopToBottom && dy != 0) {
|
|
2052 |
int currentValue = qBound(0, verticalValue, max);
|
|
2053 |
int previousValue = qBound(0, currentValue + dy, max);
|
|
2054 |
int currentCoordinate = flowPositions.at(scrollValueMap.at(currentValue));
|
|
2055 |
int previousCoordinate = flowPositions.at(scrollValueMap.at(previousValue));
|
|
2056 |
dy = previousCoordinate - currentCoordinate;
|
|
2057 |
} else if (horizontal && flow() == QListView::LeftToRight && dx != 0) {
|
|
2058 |
int currentValue = qBound(0, horizontalValue, max);
|
|
2059 |
int previousValue = qBound(0, currentValue + dx, max);
|
|
2060 |
int currentCoordinate = flowPositions.at(scrollValueMap.at(currentValue));
|
|
2061 |
int previousCoordinate = flowPositions.at(scrollValueMap.at(previousValue));
|
|
2062 |
dx = previousCoordinate - currentCoordinate;
|
|
2063 |
}
|
|
2064 |
}
|
|
2065 |
QCommonListViewBase::scrollContentsBy(dx, dy, scrollElasticBand);
|
|
2066 |
}
|
|
2067 |
|
|
2068 |
bool QListModeViewBase::doBatchedItemLayout(const QListViewLayoutInfo &info, int max)
|
|
2069 |
{
|
|
2070 |
doStaticLayout(info);
|
|
2071 |
if (batchStartRow > max) { // stop items layout
|
|
2072 |
flowPositions.resize(flowPositions.count());
|
|
2073 |
segmentPositions.resize(segmentPositions.count());
|
|
2074 |
segmentStartRows.resize(segmentStartRows.count());
|
|
2075 |
return true; // done
|
|
2076 |
}
|
|
2077 |
return false; // not done
|
|
2078 |
}
|
|
2079 |
|
|
2080 |
QListViewItem QListModeViewBase::indexToListViewItem(const QModelIndex &index) const
|
|
2081 |
{
|
|
2082 |
if (flowPositions.isEmpty()
|
|
2083 |
|| segmentPositions.isEmpty()
|
|
2084 |
|| index.row() >= flowPositions.count())
|
|
2085 |
return QListViewItem();
|
|
2086 |
|
|
2087 |
const int segment = qBinarySearch<int>(segmentStartRows, index.row(),
|
|
2088 |
0, segmentStartRows.count() - 1);
|
|
2089 |
|
|
2090 |
|
|
2091 |
QStyleOptionViewItemV4 options = viewOptions();
|
|
2092 |
options.rect.setSize(contentsSize);
|
|
2093 |
QSize size = (uniformItemSizes() && cachedItemSize().isValid())
|
|
2094 |
? cachedItemSize() : itemSize(options, index);
|
|
2095 |
|
|
2096 |
QPoint pos;
|
|
2097 |
if (flow() == QListView::LeftToRight) {
|
|
2098 |
pos.setX(flowPositions.at(index.row()));
|
|
2099 |
pos.setY(segmentPositions.at(segment));
|
|
2100 |
} else { // TopToBottom
|
|
2101 |
pos.setY(flowPositions.at(index.row()));
|
|
2102 |
pos.setX(segmentPositions.at(segment));
|
|
2103 |
if (isWrapping()) { // make the items as wide as the segment
|
|
2104 |
int right = (segment + 1 >= segmentPositions.count()
|
|
2105 |
? contentsSize.width()
|
|
2106 |
: segmentPositions.at(segment + 1));
|
|
2107 |
size.setWidth(right - pos.x());
|
|
2108 |
} else { // make the items as wide as the viewport
|
|
2109 |
size.setWidth(qMax(size.width(), viewport()->width()));
|
|
2110 |
}
|
|
2111 |
}
|
|
2112 |
|
|
2113 |
return QListViewItem(QRect(pos, size), index.row());
|
|
2114 |
}
|
|
2115 |
|
|
2116 |
QPoint QListModeViewBase::initStaticLayout(const QListViewLayoutInfo &info)
|
|
2117 |
{
|
|
2118 |
int x, y;
|
|
2119 |
if (info.first == 0) {
|
|
2120 |
flowPositions.clear();
|
|
2121 |
segmentPositions.clear();
|
|
2122 |
segmentStartRows.clear();
|
|
2123 |
segmentExtents.clear();
|
|
2124 |
scrollValueMap.clear();
|
|
2125 |
x = info.bounds.left() + info.spacing;
|
|
2126 |
y = info.bounds.top() + info.spacing;
|
|
2127 |
segmentPositions.append(info.flow == QListView::LeftToRight ? y : x);
|
|
2128 |
segmentStartRows.append(0);
|
|
2129 |
} else if (info.wrap) {
|
|
2130 |
if (info.flow == QListView::LeftToRight) {
|
|
2131 |
x = batchSavedPosition;
|
|
2132 |
y = segmentPositions.last();
|
|
2133 |
} else { // flow == QListView::TopToBottom
|
|
2134 |
x = segmentPositions.last();
|
|
2135 |
y = batchSavedPosition;
|
|
2136 |
}
|
|
2137 |
} else { // not first and not wrap
|
|
2138 |
if (info.flow == QListView::LeftToRight) {
|
|
2139 |
x = batchSavedPosition;
|
|
2140 |
y = info.bounds.top() + info.spacing;
|
|
2141 |
} else { // flow == QListView::TopToBottom
|
|
2142 |
x = info.bounds.left() + info.spacing;
|
|
2143 |
y = batchSavedPosition;
|
|
2144 |
}
|
|
2145 |
}
|
|
2146 |
return QPoint(x, y);
|
|
2147 |
}
|
|
2148 |
|
|
2149 |
/*!
|
|
2150 |
\internal
|
|
2151 |
*/
|
|
2152 |
void QListModeViewBase::doStaticLayout(const QListViewLayoutInfo &info)
|
|
2153 |
{
|
|
2154 |
const bool useItemSize = !info.grid.isValid();
|
|
2155 |
const QPoint topLeft = initStaticLayout(info);
|
|
2156 |
QStyleOptionViewItemV4 option = viewOptions();
|
|
2157 |
option.rect = info.bounds;
|
|
2158 |
|
|
2159 |
// The static layout data structures are as follows:
|
|
2160 |
// One vector contains the coordinate in the direction of layout flow.
|
|
2161 |
// Another vector contains the coordinates of the segments.
|
|
2162 |
// A third vector contains the index (model row) of the first item
|
|
2163 |
// of each segment.
|
|
2164 |
|
|
2165 |
int segStartPosition;
|
|
2166 |
int segEndPosition;
|
|
2167 |
int deltaFlowPosition;
|
|
2168 |
int deltaSegPosition;
|
|
2169 |
int deltaSegHint;
|
|
2170 |
int flowPosition;
|
|
2171 |
int segPosition;
|
|
2172 |
|
|
2173 |
if (info.flow == QListView::LeftToRight) {
|
|
2174 |
segStartPosition = info.bounds.left();
|
|
2175 |
segEndPosition = info.bounds.width();
|
|
2176 |
flowPosition = topLeft.x();
|
|
2177 |
segPosition = topLeft.y();
|
|
2178 |
deltaFlowPosition = info.grid.width(); // dx
|
|
2179 |
deltaSegPosition = useItemSize ? batchSavedDeltaSeg : info.grid.height(); // dy
|
|
2180 |
deltaSegHint = info.grid.height();
|
|
2181 |
} else { // flow == QListView::TopToBottom
|
|
2182 |
segStartPosition = info.bounds.top();
|
|
2183 |
segEndPosition = info.bounds.height();
|
|
2184 |
flowPosition = topLeft.y();
|
|
2185 |
segPosition = topLeft.x();
|
|
2186 |
deltaFlowPosition = info.grid.height(); // dy
|
|
2187 |
deltaSegPosition = useItemSize ? batchSavedDeltaSeg : info.grid.width(); // dx
|
|
2188 |
deltaSegHint = info.grid.width();
|
|
2189 |
}
|
|
2190 |
|
|
2191 |
for (int row = info.first; row <= info.last; ++row) {
|
|
2192 |
if (isHidden(row)) { // ###
|
|
2193 |
flowPositions.append(flowPosition);
|
|
2194 |
} else {
|
|
2195 |
// if we are not using a grid, we need to find the deltas
|
|
2196 |
if (useItemSize) {
|
|
2197 |
QSize hint = itemSize(option, modelIndex(row));
|
|
2198 |
if (info.flow == QListView::LeftToRight) {
|
|
2199 |
deltaFlowPosition = hint.width() + info.spacing;
|
|
2200 |
deltaSegHint = hint.height() + info.spacing;
|
|
2201 |
} else { // TopToBottom
|
|
2202 |
deltaFlowPosition = hint.height() + info.spacing;
|
|
2203 |
deltaSegHint = hint.width() + info.spacing;
|
|
2204 |
}
|
|
2205 |
}
|
|
2206 |
// create new segment
|
|
2207 |
if (info.wrap && (flowPosition + deltaFlowPosition >= segEndPosition)) {
|
|
2208 |
segmentExtents.append(flowPosition);
|
|
2209 |
flowPosition = info.spacing + segStartPosition;
|
|
2210 |
segPosition += deltaSegPosition;
|
|
2211 |
segmentPositions.append(segPosition);
|
|
2212 |
segmentStartRows.append(row);
|
|
2213 |
deltaSegPosition = 0;
|
|
2214 |
}
|
|
2215 |
// save the flow position of this item
|
|
2216 |
scrollValueMap.append(flowPositions.count());
|
|
2217 |
flowPositions.append(flowPosition);
|
|
2218 |
// prepare for the next item
|
|
2219 |
deltaSegPosition = qMax(deltaSegHint, deltaSegPosition);
|
|
2220 |
flowPosition += info.spacing + deltaFlowPosition;
|
|
2221 |
}
|
|
2222 |
}
|
|
2223 |
// used when laying out next batch
|
|
2224 |
batchSavedPosition = flowPosition;
|
|
2225 |
batchSavedDeltaSeg = deltaSegPosition;
|
|
2226 |
batchStartRow = info.last + 1;
|
|
2227 |
if (info.last == info.max)
|
|
2228 |
flowPosition -= info.spacing; // remove extra spacing
|
|
2229 |
// set the contents size
|
|
2230 |
QRect rect = info.bounds;
|
|
2231 |
if (info.flow == QListView::LeftToRight) {
|
|
2232 |
rect.setRight(segmentPositions.count() == 1 ? flowPosition : info.bounds.right());
|
|
2233 |
rect.setBottom(segPosition + deltaSegPosition);
|
|
2234 |
} else { // TopToBottom
|
|
2235 |
rect.setRight(segPosition + deltaSegPosition);
|
|
2236 |
rect.setBottom(segmentPositions.count() == 1 ? flowPosition : info.bounds.bottom());
|
|
2237 |
}
|
|
2238 |
contentsSize = QSize(rect.right(), rect.bottom());
|
|
2239 |
// if it is the last batch, save the end of the segments
|
|
2240 |
if (info.last == info.max) {
|
|
2241 |
segmentExtents.append(flowPosition);
|
|
2242 |
scrollValueMap.append(flowPositions.count());
|
|
2243 |
flowPositions.append(flowPosition);
|
|
2244 |
segmentPositions.append(info.wrap ? segPosition + deltaSegPosition : INT_MAX);
|
|
2245 |
}
|
|
2246 |
// if the new items are visble, update the viewport
|
|
2247 |
QRect changedRect(topLeft, rect.bottomRight());
|
|
2248 |
if (clipRect().intersects(changedRect))
|
|
2249 |
viewport()->update();
|
|
2250 |
}
|
|
2251 |
|
|
2252 |
/*!
|
|
2253 |
\internal
|
|
2254 |
Finds the set of items intersecting with \a area.
|
|
2255 |
In this function, itemsize is counted from topleft to the start of the next item.
|
|
2256 |
*/
|
|
2257 |
QVector<QModelIndex> QListModeViewBase::intersectingSet(const QRect &area) const
|
|
2258 |
{
|
|
2259 |
QVector<QModelIndex> ret;
|
|
2260 |
int segStartPosition;
|
|
2261 |
int segEndPosition;
|
|
2262 |
int flowStartPosition;
|
|
2263 |
int flowEndPosition;
|
|
2264 |
if (flow() == QListView::LeftToRight) {
|
|
2265 |
segStartPosition = area.top();
|
|
2266 |
segEndPosition = area.bottom();
|
|
2267 |
flowStartPosition = area.left();
|
|
2268 |
flowEndPosition = area.right();
|
|
2269 |
} else {
|
|
2270 |
segStartPosition = area.left();
|
|
2271 |
segEndPosition = area.right();
|
|
2272 |
flowStartPosition = area.top();
|
|
2273 |
flowEndPosition = area.bottom();
|
|
2274 |
}
|
|
2275 |
if (segmentPositions.count() < 2 || flowPositions.isEmpty())
|
|
2276 |
return ret;
|
|
2277 |
// the last segment position is actually the edge of the last segment
|
|
2278 |
const int segLast = segmentPositions.count() - 2;
|
|
2279 |
int seg = qBinarySearch<int>(segmentPositions, segStartPosition, 0, segLast + 1);
|
|
2280 |
for (; seg <= segLast && segmentPositions.at(seg) <= segEndPosition; ++seg) {
|
|
2281 |
int first = segmentStartRows.at(seg);
|
|
2282 |
int last = (seg < segLast ? segmentStartRows.at(seg + 1) : batchStartRow) - 1;
|
|
2283 |
if (segmentExtents.at(seg) < flowStartPosition)
|
|
2284 |
continue;
|
|
2285 |
int row = qBinarySearch<int>(flowPositions, flowStartPosition, first, last);
|
|
2286 |
for (; row <= last && flowPositions.at(row) <= flowEndPosition; ++row) {
|
|
2287 |
if (isHidden(row))
|
|
2288 |
continue;
|
|
2289 |
QModelIndex index = modelIndex(row);
|
|
2290 |
if (index.isValid())
|
|
2291 |
ret += index;
|
|
2292 |
#if 0 // for debugging
|
|
2293 |
else
|
|
2294 |
qWarning("intersectingSet: row %d was invalid", row);
|
|
2295 |
#endif
|
|
2296 |
}
|
|
2297 |
}
|
|
2298 |
return ret;
|
|
2299 |
}
|
|
2300 |
|
|
2301 |
QRect QListModeViewBase::mapToViewport(const QRect &rect) const
|
|
2302 |
{
|
|
2303 |
if (isWrapping())
|
|
2304 |
return rect;
|
|
2305 |
// If the listview is in "listbox-mode", the items are as wide as the view.
|
|
2306 |
// But we don't shrink the items.
|
|
2307 |
QRect result = rect;
|
|
2308 |
if (flow() == QListView::TopToBottom) {
|
|
2309 |
result.setLeft(spacing());
|
|
2310 |
result.setWidth(qMax(rect.width(), qMax(contentsSize.width(), viewport()->width()) - 2 * spacing()));
|
|
2311 |
} else { // LeftToRight
|
|
2312 |
result.setTop(spacing());
|
|
2313 |
result.setHeight(qMax(rect.height(), qMax(contentsSize.height(), viewport()->height()) - 2 * spacing()));
|
|
2314 |
}
|
|
2315 |
return result;
|
|
2316 |
}
|
|
2317 |
|
|
2318 |
int QListModeViewBase::perItemScrollingPageSteps(int length, int bounds, bool wrap) const
|
|
2319 |
{
|
|
2320 |
QVector<int> positions;
|
|
2321 |
if (wrap)
|
|
2322 |
positions = segmentPositions;
|
|
2323 |
else if (!flowPositions.isEmpty()) {
|
|
2324 |
positions.reserve(scrollValueMap.size());
|
|
2325 |
foreach (int itemShown, scrollValueMap)
|
|
2326 |
positions.append(flowPositions.at(itemShown));
|
|
2327 |
}
|
|
2328 |
if (positions.isEmpty() || bounds <= length)
|
|
2329 |
return positions.count();
|
|
2330 |
if (uniformItemSizes()) {
|
|
2331 |
for (int i = 1; i < positions.count(); ++i)
|
|
2332 |
if (positions.at(i) > 0)
|
|
2333 |
return length / positions.at(i);
|
|
2334 |
return 0; // all items had height 0
|
|
2335 |
}
|
|
2336 |
int pageSteps = 0;
|
|
2337 |
int steps = positions.count() - 1;
|
|
2338 |
int max = qMax(length, bounds);
|
|
2339 |
int min = qMin(length, bounds);
|
|
2340 |
int pos = min - (max - positions.last());
|
|
2341 |
|
|
2342 |
while (pos >= 0 && steps > 0) {
|
|
2343 |
pos -= (positions.at(steps) - positions.at(steps - 1));
|
|
2344 |
if (pos >= 0) //this item should be visible
|
|
2345 |
++pageSteps;
|
|
2346 |
--steps;
|
|
2347 |
}
|
|
2348 |
|
|
2349 |
// at this point we know that positions has at least one entry
|
|
2350 |
return qMax(pageSteps, 1);
|
|
2351 |
}
|
|
2352 |
|
|
2353 |
int QListModeViewBase::perItemScrollToValue(int index, int scrollValue, int viewportSize,
|
|
2354 |
QAbstractItemView::ScrollHint hint,
|
|
2355 |
Qt::Orientation orientation, bool wrap, int itemExtent) const
|
|
2356 |
{
|
|
2357 |
if (index < 0)
|
|
2358 |
return scrollValue;
|
|
2359 |
if (!wrap) {
|
|
2360 |
int topIndex = index;
|
|
2361 |
const int bottomIndex = topIndex;
|
|
2362 |
const int bottomCoordinate = flowPositions.at(index);
|
|
2363 |
|
|
2364 |
while (topIndex > 0 &&
|
|
2365 |
(bottomCoordinate - flowPositions.at(topIndex-1) + itemExtent) <= (viewportSize)) {
|
|
2366 |
topIndex--;
|
|
2367 |
}
|
|
2368 |
|
|
2369 |
const int itemCount = bottomIndex - topIndex + 1;
|
|
2370 |
switch (hint) {
|
|
2371 |
case QAbstractItemView::PositionAtTop:
|
|
2372 |
return index;
|
|
2373 |
case QAbstractItemView::PositionAtBottom:
|
|
2374 |
return index - itemCount + 1;
|
|
2375 |
case QAbstractItemView::PositionAtCenter:
|
|
2376 |
return index - (itemCount / 2);
|
|
2377 |
default:
|
|
2378 |
break;
|
|
2379 |
}
|
|
2380 |
} else { // wrapping
|
|
2381 |
Qt::Orientation flowOrientation = (flow() == QListView::LeftToRight
|
|
2382 |
? Qt::Horizontal : Qt::Vertical);
|
|
2383 |
if (flowOrientation == orientation) { // scrolling in the "flow" direction
|
|
2384 |
// ### wrapped scrolling in the flow direction
|
|
2385 |
return flowPositions.at(index); // ### always pixel based for now
|
|
2386 |
} else if (!segmentStartRows.isEmpty()) { // we are scrolling in the "segment" direction
|
|
2387 |
int segment = qBinarySearch<int>(segmentStartRows, index, 0, segmentStartRows.count() - 1);
|
|
2388 |
int leftSegment = segment;
|
|
2389 |
const int rightSegment = leftSegment;
|
|
2390 |
const int bottomCoordinate = segmentPositions.at(segment);
|
|
2391 |
|
|
2392 |
while (leftSegment > scrollValue &&
|
|
2393 |
(bottomCoordinate - segmentPositions.at(leftSegment-1) + itemExtent) <= (viewportSize)) {
|
|
2394 |
leftSegment--;
|
|
2395 |
}
|
|
2396 |
|
|
2397 |
const int segmentCount = rightSegment - leftSegment + 1;
|
|
2398 |
switch (hint) {
|
|
2399 |
case QAbstractItemView::PositionAtTop:
|
|
2400 |
return segment;
|
|
2401 |
case QAbstractItemView::PositionAtBottom:
|
|
2402 |
return segment - segmentCount + 1;
|
|
2403 |
case QAbstractItemView::PositionAtCenter:
|
|
2404 |
return segment - (segmentCount / 2);
|
|
2405 |
default:
|
|
2406 |
break;
|
|
2407 |
}
|
|
2408 |
}
|
|
2409 |
}
|
|
2410 |
return scrollValue;
|
|
2411 |
}
|
|
2412 |
|
|
2413 |
void QListModeViewBase::clear()
|
|
2414 |
{
|
|
2415 |
flowPositions.clear();
|
|
2416 |
segmentPositions.clear();
|
|
2417 |
segmentStartRows.clear();
|
|
2418 |
segmentExtents.clear();
|
|
2419 |
batchSavedPosition = 0;
|
|
2420 |
batchStartRow = 0;
|
|
2421 |
batchSavedDeltaSeg = 0;
|
|
2422 |
}
|
|
2423 |
|
|
2424 |
/*
|
|
2425 |
* IconMode ListView Implementation
|
|
2426 |
*/
|
|
2427 |
|
|
2428 |
void QIconModeViewBase::setPositionForIndex(const QPoint &position, const QModelIndex &index)
|
|
2429 |
{
|
|
2430 |
if (index.row() >= items.count())
|
|
2431 |
return;
|
|
2432 |
const QSize oldContents = contentsSize;
|
|
2433 |
qq->update(index); // update old position
|
|
2434 |
moveItem(index.row(), position);
|
|
2435 |
qq->update(index); // update new position
|
|
2436 |
|
|
2437 |
if (contentsSize != oldContents)
|
|
2438 |
dd->viewUpdateGeometries(); // update the scroll bars
|
|
2439 |
}
|
|
2440 |
|
|
2441 |
void QIconModeViewBase::appendHiddenRow(int row)
|
|
2442 |
{
|
|
2443 |
if (row >= 0 && row < items.count()) //remove item
|
|
2444 |
tree.removeLeaf(items.at(row).rect(), row);
|
|
2445 |
QCommonListViewBase::appendHiddenRow(row);
|
|
2446 |
}
|
|
2447 |
|
|
2448 |
void QIconModeViewBase::removeHiddenRow(int row)
|
|
2449 |
{
|
|
2450 |
QCommonListViewBase::removeHiddenRow(row);
|
|
2451 |
if (row >= 0 && row < items.count()) //insert item
|
|
2452 |
tree.insertLeaf(items.at(row).rect(), row);
|
|
2453 |
}
|
|
2454 |
|
|
2455 |
#ifndef QT_NO_DRAGANDDROP
|
|
2456 |
void QIconModeViewBase::paintDragDrop(QPainter *painter)
|
|
2457 |
{
|
|
2458 |
if (!draggedItems.isEmpty() && viewport()->rect().contains(draggedItemsPos)) {
|
|
2459 |
//we need to draw the items that arre dragged
|
|
2460 |
painter->translate(draggedItemsDelta());
|
|
2461 |
QStyleOptionViewItemV4 option = viewOptions();
|
|
2462 |
option.state &= ~QStyle::State_MouseOver;
|
|
2463 |
QVector<QModelIndex>::const_iterator it = draggedItems.begin();
|
|
2464 |
QListViewItem item = indexToListViewItem(*it);
|
|
2465 |
for (; it != draggedItems.end(); ++it) {
|
|
2466 |
item = indexToListViewItem(*it);
|
|
2467 |
option.rect = viewItemRect(item);
|
|
2468 |
delegate(*it)->paint(painter, option, *it);
|
|
2469 |
}
|
|
2470 |
}
|
|
2471 |
}
|
|
2472 |
|
|
2473 |
bool QIconModeViewBase::filterStartDrag(Qt::DropActions supportedActions)
|
|
2474 |
{
|
|
2475 |
// This function does the same thing as in QAbstractItemView::startDrag(),
|
|
2476 |
// plus adding viewitems to the draggedItems list.
|
|
2477 |
// We need these items to draw the drag items
|
|
2478 |
QModelIndexList indexes = dd->selectionModel->selectedIndexes();
|
|
2479 |
if (indexes.count() > 0 ) {
|
|
2480 |
if (viewport()->acceptDrops()) {
|
|
2481 |
QModelIndexList::ConstIterator it = indexes.constBegin();
|
|
2482 |
for (; it != indexes.constEnd(); ++it)
|
|
2483 |
if (dd->model->flags(*it) & Qt::ItemIsDragEnabled
|
|
2484 |
&& (*it).column() == dd->column)
|
|
2485 |
draggedItems.push_back(*it);
|
|
2486 |
}
|
|
2487 |
QDrag *drag = new QDrag(qq);
|
|
2488 |
drag->setMimeData(dd->model->mimeData(indexes));
|
|
2489 |
Qt::DropAction action = drag->exec(supportedActions, Qt::CopyAction);
|
|
2490 |
draggedItems.clear();
|
|
2491 |
if (action == Qt::MoveAction)
|
|
2492 |
dd->clearOrRemove();
|
|
2493 |
}
|
|
2494 |
return true;
|
|
2495 |
}
|
|
2496 |
|
|
2497 |
bool QIconModeViewBase::filterDropEvent(QDropEvent *e)
|
|
2498 |
{
|
|
2499 |
if (e->source() != qq)
|
|
2500 |
return false;
|
|
2501 |
|
|
2502 |
const QSize contents = contentsSize;
|
|
2503 |
QPoint offset(horizontalOffset(), verticalOffset());
|
|
2504 |
QPoint end = e->pos() + offset;
|
|
2505 |
QPoint start = dd->pressedPosition;
|
|
2506 |
QPoint delta = (dd->movement == QListView::Snap ? snapToGrid(end) - snapToGrid(start) : end - start);
|
|
2507 |
QList<QModelIndex> indexes = dd->selectionModel->selectedIndexes();
|
|
2508 |
for (int i = 0; i < indexes.count(); ++i) {
|
|
2509 |
QModelIndex index = indexes.at(i);
|
|
2510 |
QRect rect = dd->rectForIndex(index);
|
|
2511 |
viewport()->update(dd->mapToViewport(rect, false));
|
|
2512 |
QPoint dest = rect.topLeft() + delta;
|
|
2513 |
if (qq->isRightToLeft())
|
|
2514 |
dest.setX(dd->flipX(dest.x()) - rect.width());
|
|
2515 |
moveItem(index.row(), dest);
|
|
2516 |
qq->update(index);
|
|
2517 |
}
|
|
2518 |
dd->stopAutoScroll();
|
|
2519 |
draggedItems.clear();
|
|
2520 |
dd->emitIndexesMoved(indexes);
|
|
2521 |
e->accept(); // we have handled the event
|
|
2522 |
// if the size has not grown, we need to check if it has shrinked
|
|
2523 |
if (contentsSize != contents) {
|
|
2524 |
if ((contentsSize.width() <= contents.width()
|
|
2525 |
|| contentsSize.height() <= contents.height())) {
|
|
2526 |
updateContentsSize();
|
|
2527 |
}
|
|
2528 |
dd->viewUpdateGeometries();
|
|
2529 |
}
|
|
2530 |
return true;
|
|
2531 |
}
|
|
2532 |
|
|
2533 |
bool QIconModeViewBase::filterDragLeaveEvent(QDragLeaveEvent *e)
|
|
2534 |
{
|
|
2535 |
viewport()->update(draggedItemsRect()); // erase the area
|
|
2536 |
draggedItemsPos = QPoint(-1, -1); // don't draw the dragged items
|
|
2537 |
return QCommonListViewBase::filterDragLeaveEvent(e);
|
|
2538 |
}
|
|
2539 |
|
|
2540 |
bool QIconModeViewBase::filterDragMoveEvent(QDragMoveEvent *e)
|
|
2541 |
{
|
|
2542 |
if (e->source() != qq || !dd->canDecode(e))
|
|
2543 |
return false;
|
|
2544 |
|
|
2545 |
// ignore by default
|
|
2546 |
e->ignore();
|
|
2547 |
// get old dragged items rect
|
|
2548 |
QRect itemsRect = this->itemsRect(draggedItems);
|
|
2549 |
viewport()->update(itemsRect.translated(draggedItemsDelta()));
|
|
2550 |
// update position
|
|
2551 |
draggedItemsPos = e->pos();
|
|
2552 |
// get new items rect
|
|
2553 |
viewport()->update(itemsRect.translated(draggedItemsDelta()));
|
|
2554 |
// set the item under the cursor to current
|
|
2555 |
QModelIndex index;
|
|
2556 |
if (movement() == QListView::Snap) {
|
|
2557 |
QRect rect(snapToGrid(e->pos() + offset()), gridSize());
|
|
2558 |
const QVector<QModelIndex> intersectVector = intersectingSet(rect);
|
|
2559 |
index = intersectVector.count() > 0 ? intersectVector.last() : QModelIndex();
|
|
2560 |
} else {
|
|
2561 |
index = qq->indexAt(e->pos());
|
|
2562 |
}
|
|
2563 |
// check if we allow drops here
|
|
2564 |
if (draggedItems.contains(index))
|
|
2565 |
e->accept(); // allow changing item position
|
|
2566 |
else if (dd->model->flags(index) & Qt::ItemIsDropEnabled)
|
|
2567 |
e->accept(); // allow dropping on dropenabled items
|
|
2568 |
else if (!index.isValid())
|
|
2569 |
e->accept(); // allow dropping in empty areas
|
|
2570 |
|
|
2571 |
// the event was treated. do autoscrolling
|
|
2572 |
if (dd->shouldAutoScroll(e->pos()))
|
|
2573 |
dd->startAutoScroll();
|
|
2574 |
return true;
|
|
2575 |
}
|
|
2576 |
#endif // QT_NO_DRAGANDDROP
|
|
2577 |
|
|
2578 |
void QIconModeViewBase::setRowCount(int rowCount)
|
|
2579 |
{
|
|
2580 |
tree.create(qMax(rowCount - hiddenCount(), 0));
|
|
2581 |
}
|
|
2582 |
|
|
2583 |
void QIconModeViewBase::scrollContentsBy(int dx, int dy, bool scrollElasticBand)
|
|
2584 |
{
|
|
2585 |
if (scrollElasticBand)
|
|
2586 |
dd->scrollElasticBandBy(isRightToLeft() ? -dx : dx, dy);
|
|
2587 |
|
|
2588 |
QCommonListViewBase::scrollContentsBy(dx, dy, scrollElasticBand);
|
|
2589 |
if (!draggedItems.isEmpty())
|
|
2590 |
viewport()->update(draggedItemsRect().translated(dx, dy));
|
|
2591 |
}
|
|
2592 |
|
|
2593 |
void QIconModeViewBase::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight)
|
|
2594 |
{
|
|
2595 |
if (column() >= topLeft.column() && column() <= bottomRight.column()) {
|
|
2596 |
QStyleOptionViewItemV4 option = viewOptions();
|
|
2597 |
int bottom = qMin(items.count(), bottomRight.row() + 1);
|
|
2598 |
for (int row = topLeft.row(); row < bottom; ++row)
|
|
2599 |
items[row].resize(itemSize(option, modelIndex(row)));
|
|
2600 |
}
|
|
2601 |
}
|
|
2602 |
|
|
2603 |
bool QIconModeViewBase::doBatchedItemLayout(const QListViewLayoutInfo &info, int max)
|
|
2604 |
{
|
|
2605 |
if (info.last >= items.count()) {
|
|
2606 |
//first we create the items
|
|
2607 |
QStyleOptionViewItemV4 option = viewOptions();
|
|
2608 |
for (int row = items.count(); row <= info.last; ++row) {
|
|
2609 |
QSize size = itemSize(option, modelIndex(row));
|
|
2610 |
QListViewItem item(QRect(0, 0, size.width(), size.height()), row); // default pos
|
|
2611 |
items.append(item);
|
|
2612 |
}
|
|
2613 |
doDynamicLayout(info);
|
|
2614 |
}
|
|
2615 |
return (batchStartRow > max); // done
|
|
2616 |
}
|
|
2617 |
|
|
2618 |
QListViewItem QIconModeViewBase::indexToListViewItem(const QModelIndex &index) const
|
|
2619 |
{
|
|
2620 |
if (index.isValid() && index.row() < items.count())
|
|
2621 |
return items.at(index.row());
|
|
2622 |
return QListViewItem();
|
|
2623 |
}
|
|
2624 |
|
|
2625 |
void QIconModeViewBase::initBspTree(const QSize &contents)
|
|
2626 |
{
|
|
2627 |
// remove all items from the tree
|
|
2628 |
int leafCount = tree.leafCount();
|
|
2629 |
for (int l = 0; l < leafCount; ++l)
|
|
2630 |
tree.leaf(l).clear();
|
|
2631 |
// we have to get the bounding rect of the items before we can initialize the tree
|
|
2632 |
QBspTree::Node::Type type = QBspTree::Node::Both; // 2D
|
|
2633 |
// simple heuristics to get better bsp
|
|
2634 |
if (contents.height() / contents.width() >= 3)
|
|
2635 |
type = QBspTree::Node::HorizontalPlane;
|
|
2636 |
else if (contents.width() / contents.height() >= 3)
|
|
2637 |
type = QBspTree::Node::VerticalPlane;
|
|
2638 |
// build tree for the bounding rect (not just the contents rect)
|
|
2639 |
tree.init(QRect(0, 0, contents.width(), contents.height()), type);
|
|
2640 |
}
|
|
2641 |
|
|
2642 |
QPoint QIconModeViewBase::initDynamicLayout(const QListViewLayoutInfo &info)
|
|
2643 |
{
|
|
2644 |
int x, y;
|
|
2645 |
if (info.first == 0) {
|
|
2646 |
x = info.bounds.x() + info.spacing;
|
|
2647 |
y = info.bounds.y() + info.spacing;
|
|
2648 |
items.reserve(rowCount() - hiddenCount());
|
|
2649 |
} else {
|
|
2650 |
const QListViewItem item = items.at(info.first - 1);
|
|
2651 |
x = item.x;
|
|
2652 |
y = item.y;
|
|
2653 |
if (info.flow == QListView::LeftToRight)
|
|
2654 |
x += (info.grid.isValid() ? info.grid.width() : item.w) + info.spacing;
|
|
2655 |
else
|
|
2656 |
y += (info.grid.isValid() ? info.grid.height() : item.h) + info.spacing;
|
|
2657 |
}
|
|
2658 |
return QPoint(x, y);
|
|
2659 |
}
|
|
2660 |
|
|
2661 |
/*!
|
|
2662 |
\internal
|
|
2663 |
*/
|
|
2664 |
void QIconModeViewBase::doDynamicLayout(const QListViewLayoutInfo &info)
|
|
2665 |
{
|
|
2666 |
const bool useItemSize = !info.grid.isValid();
|
|
2667 |
const QPoint topLeft = initDynamicLayout(info);
|
|
2668 |
|
|
2669 |
int segStartPosition;
|
|
2670 |
int segEndPosition;
|
|
2671 |
int deltaFlowPosition;
|
|
2672 |
int deltaSegPosition;
|
|
2673 |
int deltaSegHint;
|
|
2674 |
int flowPosition;
|
|
2675 |
int segPosition;
|
|
2676 |
|
|
2677 |
if (info.flow == QListView::LeftToRight) {
|
|
2678 |
segStartPosition = info.bounds.left() + info.spacing;
|
|
2679 |
segEndPosition = info.bounds.right();
|
|
2680 |
deltaFlowPosition = info.grid.width(); // dx
|
|
2681 |
deltaSegPosition = (useItemSize ? batchSavedDeltaSeg : info.grid.height()); // dy
|
|
2682 |
deltaSegHint = info.grid.height();
|
|
2683 |
flowPosition = topLeft.x();
|
|
2684 |
segPosition = topLeft.y();
|
|
2685 |
} else { // flow == QListView::TopToBottom
|
|
2686 |
segStartPosition = info.bounds.top() + info.spacing;
|
|
2687 |
segEndPosition = info.bounds.bottom();
|
|
2688 |
deltaFlowPosition = info.grid.height(); // dy
|
|
2689 |
deltaSegPosition = (useItemSize ? batchSavedDeltaSeg : info.grid.width()); // dx
|
|
2690 |
deltaSegHint = info.grid.width();
|
|
2691 |
flowPosition = topLeft.y();
|
|
2692 |
segPosition = topLeft.x();
|
|
2693 |
}
|
|
2694 |
|
|
2695 |
if (moved.count() != items.count())
|
|
2696 |
moved.resize(items.count());
|
|
2697 |
|
|
2698 |
QRect rect(QPoint(), topLeft);
|
|
2699 |
QListViewItem *item = 0;
|
|
2700 |
for (int row = info.first; row <= info.last; ++row) {
|
|
2701 |
item = &items[row];
|
|
2702 |
if (isHidden(row)) {
|
|
2703 |
item->invalidate();
|
|
2704 |
} else {
|
|
2705 |
// if we are not using a grid, we need to find the deltas
|
|
2706 |
if (useItemSize) {
|
|
2707 |
if (info.flow == QListView::LeftToRight)
|
|
2708 |
deltaFlowPosition = item->w + info.spacing;
|
|
2709 |
else
|
|
2710 |
deltaFlowPosition = item->h + info.spacing;
|
|
2711 |
} else {
|
|
2712 |
item->w = qMin<int>(info.grid.width(), item->w);
|
|
2713 |
item->h = qMin<int>(info.grid.height(), item->h);
|
|
2714 |
}
|
|
2715 |
|
|
2716 |
// create new segment
|
|
2717 |
if (info.wrap
|
|
2718 |
&& flowPosition + deltaFlowPosition > segEndPosition
|
|
2719 |
&& flowPosition > segStartPosition) {
|
|
2720 |
flowPosition = segStartPosition;
|
|
2721 |
segPosition += deltaSegPosition;
|
|
2722 |
if (useItemSize)
|
|
2723 |
deltaSegPosition = 0;
|
|
2724 |
}
|
|
2725 |
// We must delay calculation of the seg adjustment, as this item
|
|
2726 |
// may have caused a wrap to occur
|
|
2727 |
if (useItemSize) {
|
|
2728 |
if (info.flow == QListView::LeftToRight)
|
|
2729 |
deltaSegHint = item->h + info.spacing;
|
|
2730 |
else
|
|
2731 |
deltaSegHint = item->w + info.spacing;
|
|
2732 |
deltaSegPosition = qMax(deltaSegPosition, deltaSegHint);
|
|
2733 |
}
|
|
2734 |
|
|
2735 |
// set the position of the item
|
|
2736 |
// ### idealy we should have some sort of alignment hint for the item
|
|
2737 |
// ### (normally that would be a point between the icon and the text)
|
|
2738 |
if (!moved.testBit(row)) {
|
|
2739 |
if (info.flow == QListView::LeftToRight) {
|
|
2740 |
if (useItemSize) {
|
|
2741 |
item->x = flowPosition;
|
|
2742 |
item->y = segPosition;
|
|
2743 |
} else { // use grid
|
|
2744 |
item->x = flowPosition + ((deltaFlowPosition - item->w) / 2);
|
|
2745 |
item->y = segPosition;
|
|
2746 |
}
|
|
2747 |
} else { // TopToBottom
|
|
2748 |
if (useItemSize) {
|
|
2749 |
item->y = flowPosition;
|
|
2750 |
item->x = segPosition;
|
|
2751 |
} else { // use grid
|
|
2752 |
item->y = flowPosition + ((deltaFlowPosition - item->h) / 2);
|
|
2753 |
item->x = segPosition;
|
|
2754 |
}
|
|
2755 |
}
|
|
2756 |
}
|
|
2757 |
|
|
2758 |
// let the contents contain the new item
|
|
2759 |
if (useItemSize)
|
|
2760 |
rect |= item->rect();
|
|
2761 |
else if (info.flow == QListView::LeftToRight)
|
|
2762 |
rect |= QRect(flowPosition, segPosition, deltaFlowPosition, deltaSegPosition);
|
|
2763 |
else // flow == TopToBottom
|
|
2764 |
rect |= QRect(segPosition, flowPosition, deltaSegPosition, deltaFlowPosition);
|
|
2765 |
|
|
2766 |
// prepare for next item
|
|
2767 |
flowPosition += deltaFlowPosition; // current position + item width + gap
|
|
2768 |
}
|
|
2769 |
}
|
|
2770 |
batchSavedDeltaSeg = deltaSegPosition;
|
|
2771 |
batchStartRow = info.last + 1;
|
|
2772 |
bool done = (info.last >= rowCount() - 1);
|
|
2773 |
// resize the content area
|
|
2774 |
if (done || !info.bounds.contains(item->rect()))
|
|
2775 |
contentsSize = QSize(rect.width(), rect.height());
|
|
2776 |
// resize tree
|
|
2777 |
int insertFrom = info.first;
|
|
2778 |
if (done || info.first == 0) {
|
|
2779 |
initBspTree(rect.size());
|
|
2780 |
insertFrom = 0;
|
|
2781 |
}
|
|
2782 |
// insert items in tree
|
|
2783 |
for (int row = insertFrom; row <= info.last; ++row)
|
|
2784 |
tree.insertLeaf(items.at(row).rect(), row);
|
|
2785 |
// if the new items are visble, update the viewport
|
|
2786 |
QRect changedRect(topLeft, rect.bottomRight());
|
|
2787 |
if (clipRect().intersects(changedRect))
|
|
2788 |
viewport()->update();
|
|
2789 |
}
|
|
2790 |
|
|
2791 |
QVector<QModelIndex> QIconModeViewBase::intersectingSet(const QRect &area) const
|
|
2792 |
{
|
|
2793 |
QIconModeViewBase *that = const_cast<QIconModeViewBase*>(this);
|
|
2794 |
QBspTree::Data data(static_cast<void*>(that));
|
|
2795 |
QVector<QModelIndex> res;
|
|
2796 |
that->interSectingVector = &res;
|
|
2797 |
that->tree.climbTree(area, &QIconModeViewBase::addLeaf, data);
|
|
2798 |
that->interSectingVector = 0;
|
|
2799 |
return res;
|
|
2800 |
}
|
|
2801 |
|
|
2802 |
QRect QIconModeViewBase::itemsRect(const QVector<QModelIndex> &indexes) const
|
|
2803 |
{
|
|
2804 |
QVector<QModelIndex>::const_iterator it = indexes.begin();
|
|
2805 |
QListViewItem item = indexToListViewItem(*it);
|
|
2806 |
QRect rect(item.x, item.y, item.w, item.h);
|
|
2807 |
for (; it != indexes.end(); ++it) {
|
|
2808 |
item = indexToListViewItem(*it);
|
|
2809 |
rect |= viewItemRect(item);
|
|
2810 |
}
|
|
2811 |
return rect;
|
|
2812 |
}
|
|
2813 |
|
|
2814 |
int QIconModeViewBase::itemIndex(const QListViewItem &item) const
|
|
2815 |
{
|
|
2816 |
if (!item.isValid())
|
|
2817 |
return -1;
|
|
2818 |
int i = item.indexHint;
|
|
2819 |
if (i < items.count()) {
|
|
2820 |
if (items.at(i) == item)
|
|
2821 |
return i;
|
|
2822 |
} else {
|
|
2823 |
i = items.count() - 1;
|
|
2824 |
}
|
|
2825 |
|
|
2826 |
int j = i;
|
|
2827 |
int c = items.count();
|
|
2828 |
bool a = true;
|
|
2829 |
bool b = true;
|
|
2830 |
|
|
2831 |
while (a || b) {
|
|
2832 |
if (a) {
|
|
2833 |
if (items.at(i) == item) {
|
|
2834 |
items.at(i).indexHint = i;
|
|
2835 |
return i;
|
|
2836 |
}
|
|
2837 |
a = ++i < c;
|
|
2838 |
}
|
|
2839 |
if (b) {
|
|
2840 |
if (items.at(j) == item) {
|
|
2841 |
items.at(j).indexHint = j;
|
|
2842 |
return j;
|
|
2843 |
}
|
|
2844 |
b = --j > -1;
|
|
2845 |
}
|
|
2846 |
}
|
|
2847 |
return -1;
|
|
2848 |
}
|
|
2849 |
|
|
2850 |
void QIconModeViewBase::addLeaf(QVector<int> &leaf, const QRect &area,
|
|
2851 |
uint visited, QBspTree::Data data)
|
|
2852 |
{
|
|
2853 |
QListViewItem *vi;
|
|
2854 |
QIconModeViewBase *_this = static_cast<QIconModeViewBase *>(data.ptr);
|
|
2855 |
for (int i = 0; i < leaf.count(); ++i) {
|
|
2856 |
int idx = leaf.at(i);
|
|
2857 |
if (idx < 0 || idx >= _this->items.count())
|
|
2858 |
continue;
|
|
2859 |
vi = &_this->items[idx];
|
|
2860 |
Q_ASSERT(vi);
|
|
2861 |
if (vi->isValid() && vi->rect().intersects(area) && vi->visited != visited) {
|
|
2862 |
QModelIndex index = _this->dd->listViewItemToIndex(*vi);
|
|
2863 |
Q_ASSERT(index.isValid());
|
|
2864 |
_this->interSectingVector->append(index);
|
|
2865 |
vi->visited = visited;
|
|
2866 |
}
|
|
2867 |
}
|
|
2868 |
}
|
|
2869 |
|
|
2870 |
void QIconModeViewBase::moveItem(int index, const QPoint &dest)
|
|
2871 |
{
|
|
2872 |
// does not impact on the bintree itself or the contents rect
|
|
2873 |
QListViewItem *item = &items[index];
|
|
2874 |
QRect rect = item->rect();
|
|
2875 |
|
|
2876 |
// move the item without removing it from the tree
|
|
2877 |
tree.removeLeaf(rect, index);
|
|
2878 |
item->move(dest);
|
|
2879 |
tree.insertLeaf(QRect(dest, rect.size()), index);
|
|
2880 |
|
|
2881 |
// resize the contents area
|
|
2882 |
contentsSize = (QRect(QPoint(0, 0), contentsSize)|QRect(dest, rect.size())).size();
|
|
2883 |
|
|
2884 |
// mark the item as moved
|
|
2885 |
if (moved.count() != items.count())
|
|
2886 |
moved.resize(items.count());
|
|
2887 |
moved.setBit(index, true);
|
|
2888 |
}
|
|
2889 |
|
|
2890 |
QPoint QIconModeViewBase::snapToGrid(const QPoint &pos) const
|
|
2891 |
{
|
|
2892 |
int x = pos.x() - (pos.x() % gridSize().width());
|
|
2893 |
int y = pos.y() - (pos.y() % gridSize().height());
|
|
2894 |
return QPoint(x, y);
|
|
2895 |
}
|
|
2896 |
|
|
2897 |
QPoint QIconModeViewBase::draggedItemsDelta() const
|
|
2898 |
{
|
|
2899 |
if (movement() == QListView::Snap) {
|
|
2900 |
QPoint snapdelta = QPoint((offset().x() % gridSize().width()),
|
|
2901 |
(offset().y() % gridSize().height()));
|
|
2902 |
return snapToGrid(draggedItemsPos + snapdelta) - snapToGrid(pressedPosition()) - snapdelta;
|
|
2903 |
}
|
|
2904 |
return draggedItemsPos - pressedPosition();
|
|
2905 |
}
|
|
2906 |
|
|
2907 |
QRect QIconModeViewBase::draggedItemsRect() const
|
|
2908 |
{
|
|
2909 |
QRect rect = itemsRect(draggedItems);
|
|
2910 |
rect.translate(draggedItemsDelta());
|
|
2911 |
return rect;
|
|
2912 |
}
|
|
2913 |
|
|
2914 |
void QListViewPrivate::scrollElasticBandBy(int dx, int dy)
|
|
2915 |
{
|
|
2916 |
if (dx > 0) // right
|
|
2917 |
elasticBand.moveRight(elasticBand.right() + dx);
|
|
2918 |
else if (dx < 0) // left
|
|
2919 |
elasticBand.moveLeft(elasticBand.left() - dx);
|
|
2920 |
if (dy > 0) // down
|
|
2921 |
elasticBand.moveBottom(elasticBand.bottom() + dy);
|
|
2922 |
else if (dy < 0) // up
|
|
2923 |
elasticBand.moveTop(elasticBand.top() - dy);
|
|
2924 |
}
|
|
2925 |
|
|
2926 |
void QIconModeViewBase::clear()
|
|
2927 |
{
|
|
2928 |
tree.destroy();
|
|
2929 |
items.clear();
|
|
2930 |
moved.clear();
|
|
2931 |
batchStartRow = 0;
|
|
2932 |
batchSavedDeltaSeg = 0;
|
|
2933 |
}
|
|
2934 |
|
|
2935 |
void QIconModeViewBase::updateContentsSize()
|
|
2936 |
{
|
|
2937 |
QRect bounding;
|
|
2938 |
for (int i = 0; i < items.count(); ++i)
|
|
2939 |
bounding |= items.at(i).rect();
|
|
2940 |
contentsSize = bounding.size();
|
|
2941 |
}
|
|
2942 |
|
|
2943 |
/*!
|
|
2944 |
\reimp
|
|
2945 |
*/
|
|
2946 |
void QListView::currentChanged(const QModelIndex ¤t, const QModelIndex &previous)
|
|
2947 |
{
|
|
2948 |
#ifndef QT_NO_ACCESSIBILITY
|
|
2949 |
if (QAccessible::isActive()) {
|
|
2950 |
if (current.isValid()) {
|
|
2951 |
int entry = visualIndex(current) + 1;
|
|
2952 |
QAccessible::updateAccessibility(viewport(), entry, QAccessible::Focus);
|
|
2953 |
}
|
|
2954 |
}
|
|
2955 |
#endif
|
|
2956 |
QAbstractItemView::currentChanged(current, previous);
|
|
2957 |
}
|
|
2958 |
|
|
2959 |
/*!
|
|
2960 |
\reimp
|
|
2961 |
*/
|
|
2962 |
void QListView::selectionChanged(const QItemSelection &selected,
|
|
2963 |
const QItemSelection &deselected)
|
|
2964 |
{
|
|
2965 |
#ifndef QT_NO_ACCESSIBILITY
|
|
2966 |
if (QAccessible::isActive()) {
|
|
2967 |
// ### does not work properly for selection ranges.
|
|
2968 |
QModelIndex sel = selected.indexes().value(0);
|
|
2969 |
if (sel.isValid()) {
|
|
2970 |
int entry = visualIndex(sel) + 1;
|
|
2971 |
QAccessible::updateAccessibility(viewport(), entry, QAccessible::Selection);
|
|
2972 |
}
|
|
2973 |
QModelIndex desel = deselected.indexes().value(0);
|
|
2974 |
if (desel.isValid()) {
|
|
2975 |
int entry = visualIndex(desel) + 1;
|
|
2976 |
QAccessible::updateAccessibility(viewport(), entry, QAccessible::SelectionRemove);
|
|
2977 |
}
|
|
2978 |
}
|
|
2979 |
#endif
|
|
2980 |
QAbstractItemView::selectionChanged(selected, deselected);
|
|
2981 |
}
|
|
2982 |
|
|
2983 |
int QListView::visualIndex(const QModelIndex &index) const
|
|
2984 |
{
|
|
2985 |
Q_D(const QListView);
|
|
2986 |
d->executePostedLayout();
|
|
2987 |
QListViewItem itm = d->indexToListViewItem(index);
|
|
2988 |
return d->commonListView->itemIndex(itm);
|
|
2989 |
}
|
|
2990 |
|
|
2991 |
QT_END_NAMESPACE
|
|
2992 |
|
|
2993 |
#endif // QT_NO_LISTVIEW
|