author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Mon, 19 Apr 2010 14:02:13 +0300 | |
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child 1 | f7ac710697a9 |
permissions | -rw-r--r-- |
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/**************************************************************************** |
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** |
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** Copyright (C) 2008-2010 Nokia Corporation and/or its subsidiary(-ies). |
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** All rights reserved. |
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** Contact: Nokia Corporation (developer.feedback@nokia.com) |
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** |
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** This file is part of the HbWidgets module of the UI Extensions for Mobile. |
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** |
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** GNU Lesser General Public License Usage |
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** This file may be used under the terms of the GNU Lesser General Public |
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** License version 2.1 as published by the Free Software Foundation and |
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** appearing in the file LICENSE.LGPL included in the packaging of this file. |
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** Please review the following information to ensure the GNU Lesser General |
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** Public License version 2.1 requirements will be met: |
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** 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 developer.feedback@nokia.com. |
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** |
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****************************************************************************/ |
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#include <hbgridview.h> |
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#include <hbgridview_p.h> |
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#include <hbgridlayout_p.h> |
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#include <hbabstractviewitem.h> |
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#include <hbeffect.h> |
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#include <hbmodeliterator.h> |
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#include <QGraphicsSceneMouseEvent> |
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/*! |
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@beta |
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@hbwidgets |
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\class HbGridView |
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\brief HbGridView implements a grid view. Data is represented by HbGridViewItem. |
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HbGridView is an HbAbstractItemView implementation using the model/view design pattern. |
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Since HbGridView is derived from HbAbstractItemView it can use QAbstractItemModel-derived implementations |
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(for example QStandardItemModel) as a model. |
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See HbAbstractItemView for emitted signals (touch events & item activation). |
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<b> Scrolling Directions </b> |
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|
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Scrolling can be set to either a \link Qt::Horizontal \endlink or \link Qt::Vertical \endlink direction. |
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Items are arranged according to the scroll direction i.e Qt::Horizontal lays out items |
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horizontally and Qt::Vertical lays out items vertically. |
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By default the HbScrollArea::ClampingStyle used is BounceBackClamping, the HbScrollArea::ScrollingStyle is PanOrFlick, |
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scrollbars are invisible and recycling and inertia are disabled. |
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The following code snippet demonstrates the use of HbGridView |
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\snippet{ultimatecodesnippet/ultimatecodesnippet.cpp,21} |
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*/ |
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/*! |
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GridView recycling is in proto state. |
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*/ |
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/*! |
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See also HbAbstractItemView,HbAbstractViewitem,HbGridViewItem,HbScrollArea |
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*/ |
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/*! |
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Constructs a new HbGridView with \a parent. |
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*/ |
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HbGridView::HbGridView(QGraphicsItem *parent) : |
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HbAbstractItemView(*new HbGridViewPrivate(), new HbGridItemContainer(), new HbModelIterator(), parent) |
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{ |
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Q_D( HbGridView ); |
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d->q_ptr = this; |
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d->init(); |
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} |
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HbGridView::HbGridView(HbGridViewPrivate &dd, HbAbstractItemContainer *container, QGraphicsItem *parent) : |
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HbAbstractItemView(dd, container, new HbModelIterator(), parent) |
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{ |
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Q_D( HbGridView ); |
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d->q_ptr = this; |
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d->init(); |
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} |
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HbGridView::~HbGridView() |
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{ |
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} |
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/*! |
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\property HbGridView::rowCount() |
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\brief Returns the total number of rows in the view. |
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\sa HbGridView::setRowCount() |
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*/ |
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int HbGridView::rowCount() const |
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{ |
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Q_D(const HbGridView); |
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return d->itemContainer()->rowCount(); |
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} |
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/*! |
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\property HbGridView::setRowCount() |
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\brief Sets the total number of rows to \a rowCount. |
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\sa HbGridView::rowCount() |
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*/ |
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void HbGridView::setRowCount(int rowCount) |
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{ |
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Q_D(HbGridView); |
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d->mVisibleIndex = d->indexInTheCenter(); |
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d->itemContainer()->setRowCount(rowCount); |
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scrollTo(d->mVisibleIndex, HbAbstractItemView::PositionAtCenter); |
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} |
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/*! |
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\property HbGridView::columnCount |
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\brief Returns the total number of columns in the view. |
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\sa HbGridView::setColumnCount() |
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*/ |
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int HbGridView::columnCount() const |
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{ |
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Q_D(const HbGridView); |
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return d->itemContainer()->columnCount(); |
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} |
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/*! |
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\property HbGridView::setColumnCount |
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\brief Sets the total number of columns to \a columnCount. |
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\sa HbGridView::columnCount() |
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*/ |
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void HbGridView::setColumnCount(int columnCount) |
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{ |
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Q_D(HbGridView); |
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d->mVisibleIndex = d->indexInTheCenter(); |
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d->itemContainer()->setColumnCount(columnCount); |
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scrollTo(d->mVisibleIndex, HbAbstractItemView::PositionAtCenter); |
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} |
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/*! |
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\property HbGridView::iconVisible() |
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\brief Returns true if icons are currently displayed in GridView. |
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\sa HbGridView::setIconVisible() |
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*/ |
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bool HbGridView::iconVisible() const |
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{ |
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Q_D(const HbGridView); |
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return d->mIconVisible; |
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} |
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/*! |
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\property HbGridView::setIconVisible() |
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\brief Set visibility of icons in GridView to \a visible. |
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All view items are updated automatically. |
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\sa HbGridView::iconVisible() |
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*/ |
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void HbGridView::setIconVisible(bool visible) |
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{ |
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Q_D(HbGridView); |
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d->setIconVisible(visible); |
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} |
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/*! |
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\property HbGridView::textVisible() |
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\brief Returns visibility of labels in GridView. |
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\sa HbGridView::setTextVisible() |
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*/ |
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bool HbGridView::textVisible() const |
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{ |
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Q_D(const HbGridView); |
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return d->mTextVisible; |
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} |
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/*! |
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\property HbGridView::setTextVisible() |
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\brief Sets visibility of labels in GridView to \a visible. |
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All view items are updated automatically. |
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\sa HbGridView::textVisible() |
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*/ |
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void HbGridView::setTextVisible(bool visible) |
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{ |
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Q_D(HbGridView); |
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d->setTextVisible(visible); |
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} |
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/*! |
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Returns item at \a row and \a column. |
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*/ |
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HbAbstractViewItem *HbGridView::itemAt(int row, int column) const |
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{ |
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Q_D(const HbGridView); |
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if ( row >= 0 |
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&& column >= 0 |
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&& column < d->itemContainer()->columnCount() |
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&& d->mModelIterator->model()) { |
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int index = row*d->itemContainer()->columnCount() + column; |
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return d->itemContainer()->itemByIndex(d->mModelIterator->index(index)); |
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} |
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return 0; |
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} |
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/*! |
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Returns item at \a index. |
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Ownership of the item is not transferred. |
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\deprecated HbGridView::itemAt(int) const |
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is deprecated. Please use HbAbstractItemView::itemByIndex(const QModelIndex &index) instead. |
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\sa HbAbstractItemView::itemByIndex(const QModelIndex &index) |
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*/ |
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HbAbstractViewItem *HbGridView::itemAt(int index) const |
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{ |
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Q_D(const HbGridView); |
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|
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if (d->mModelIterator->model()) { |
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return d->itemContainer()->itemByIndex(d->mModelIterator->index(index)); |
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} |
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return 0; |
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} |
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|
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/*! |
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\reimp |
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*/ |
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void HbGridView::scrollTo(const QModelIndex &index, ScrollHint hint) |
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{ |
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Q_D(HbGridView); |
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// always use container, event if recycling is off and all items are |
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// in container, but still aditional action is needed - |
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// container::scrollTo is responsible for procesing all |
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// posponed events (DelayedLayoutRequest) |
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if ( d->mModelIterator->model() |
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&& index.model() == d->mModelIterator->model()) { |
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d->itemContainer()->scrollTo(index, hint); |
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HbAbstractItemView::scrollTo(index, hint); |
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} |
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} |
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|
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/*! |
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\reimp |
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*/ |
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void HbGridView::mouseMoveEvent(QGraphicsSceneMouseEvent *event) |
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{ |
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// overriding HbAbstractitemView's selection behaviour |
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HbScrollArea::mouseMoveEvent( event ); |
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event->accept(); |
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} |
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|
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/*! |
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\reimp |
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*/ |
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void HbGridView::orientationAboutToBeChanged() |
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{ |
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Q_D(HbGridView); |
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d->mVisibleIndex = d->indexInTheCenter(); |
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} |
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|
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/*! |
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\reimp |
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*/ |
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void HbGridView::orientationChanged(Qt::Orientation newOrientation) |
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{ |
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Q_D(HbGridView); |
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d->mContainer->setPos(0,0); |
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d->itemContainer()->orientationChanged(newOrientation); |
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|
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scrollTo(d->mVisibleIndex, HbAbstractItemView::PositionAtCenter); |
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|
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d->mVisibleIndex = QModelIndex(); |
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} |
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|
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/*! |
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\reimp |
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*/ |
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void HbGridView::rowsInserted(const QModelIndex &parent, int start, int end) |
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{ |
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Q_D(HbGridView); |
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|
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if (parent == d->mModelIterator->rootIndex()) { |
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HbAbstractItemView::rowsInserted(parent, start, end); |
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|
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bool animate = d->mEnabledAnimations & HbAbstractItemView::Appear ? d->mAnimateItems : false; |
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if (animate) { |
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if (d->mAppearAnimationIndexes.count()) { |
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d->mAppearAnimationIndexes.clear(); |
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} |
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|
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for (int i = start; i <= end; i++) { |
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QPersistentModelIndex index = d->mModelIterator->index(i, parent); |
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HbAbstractViewItem *item = itemByIndex(index); |
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if (item) { |
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d->mAppearAnimationIndexes.append(index); |
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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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\reimp |
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*/ |
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void HbGridView::rowsAboutToBeRemoved(const QModelIndex &parent, int start, int end) |
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{ |
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Q_D(HbGridView); |
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|
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if (parent == d->mModelIterator->rootIndex() && d->mModelIterator->model()) { |
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for (int i = start; i <= end; i++) { |
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HbAbstractViewItem* item = d->mContainer->itemByIndex(d->mModelIterator->index(i)); |
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if (item) { |
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bool animate = d->mEnabledAnimations & HbAbstractItemView::Disappear ? d->mAnimateItems : false; |
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if (animate) { |
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d->mItemsAboutToBeDeleted.append(item); |
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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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\reimp |
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*/ |
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void HbGridView::rowsRemoved(const QModelIndex &parent, int start, int end) |
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{ |
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Q_D(HbGridView); |
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if (parent == d->mModelIterator->rootIndex()) { |
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bool animate = d->mEnabledAnimations & HbAbstractItemView::Disappear ? d->mAnimateItems: false; |
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if (animate) { |
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for (int i = 0; i < d->mItemsAboutToBeDeleted.count(); i++) { |
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QGraphicsItem *item = d->mItemsAboutToBeDeleted.at(i); |
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HbEffect::cancel(item, "appear"); |
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HbEffect::start(item, |
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"gridviewitem", |
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"disappear", |
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d->mContainer, |
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"animationFinished"); |
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} |
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d->mItemsAboutToBeDeleted.clear(); |
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} |
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HbAbstractItemView::rowsRemoved(parent, start, end); |
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} |
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} |
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/*! |
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\reimp |
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*/ |
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void HbGridView::dataChanged(const QModelIndex &topLeft, const QModelIndex &bottomRight) |
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{ |
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Q_D(const HbGridView); |
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QList<HbAbstractViewItem *> items = d->mContainer->items(); |
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if (!items.isEmpty() |
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&& topLeft.parent() == d->mModelIterator->rootIndex() |
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&& items.first()->modelIndex().row() <= bottomRight.row() |
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&& topLeft.row() <= d->itemContainer()->lastValidItemIndex().row()) { |
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HbAbstractItemView::dataChanged(topLeft, bottomRight); |
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} |
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} |
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/*! |
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This slot is connected to scrollDirectionsChanged signal emitted from HbScrollArea. |
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*/ |
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void HbGridView::scrollDirectionChanged(Qt::Orientations scrollDirection) |
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{ |
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Q_D(HbGridView); |
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// scroll direction changed, calculations need to be done on old value |
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d->mVisibleIndex = d->indexInTheCenter((d->mScrollDirections == Qt::Vertical) |
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? Qt::Horizontal : Qt::Vertical); |
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d->mContainer->setPos(0,0); |
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d->itemContainer()->scrollDirectionChanged(scrollDirection); |
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scrollTo(d->mVisibleIndex, HbAbstractItemView::PositionAtCenter); |
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d->mVisibleIndex = QModelIndex(); |
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} |
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#include "moc_hbgridview.cpp" |