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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 "qitemselectionmodel.h"
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#include <private/qitemselectionmodel_p.h>
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#include <qdebug.h>
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#ifndef QT_NO_ITEMVIEWS
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QT_BEGIN_NAMESPACE
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/*!
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\class QItemSelectionRange
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\brief The QItemSelectionRange class manages information about a
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range of selected items in a model.
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\ingroup model-view
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A QItemSelectionRange contains information about a range of
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selected items in a model. A range of items is a contiguous array
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of model items, extending to cover a number of adjacent rows and
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columns with a common parent item; this can be visualized as a
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two-dimensional block of cells in a table. A selection range has a
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top(), left() a bottom(), right() and a parent().
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The QItemSelectionRange 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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The model items contained in the selection range can be obtained
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using the indexes() function. Use QItemSelectionModel::selectedIndexes()
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to get a list of all selected items for a view.
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You can determine whether a given model item lies within a
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particular range by using the contains() function. Ranges can also
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be compared using the overloaded operators for equality and
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inequality, and the intersects() function allows you to determine
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whether two ranges overlap.
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\sa {Model/View Programming}, QAbstractItemModel, QItemSelection,
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QItemSelectionModel
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*/
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/*!
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\fn QItemSelectionRange::QItemSelectionRange()
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Constructs an empty selection range.
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*/
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/*!
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\fn QItemSelectionRange::QItemSelectionRange(const QItemSelectionRange &other)
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Copy constructor. Constructs a new selection range with the same contents
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as the \a other range given.
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*/
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/*!
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\fn QItemSelectionRange::QItemSelectionRange(const QModelIndex &topLeft, const QModelIndex &bottomRight)
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Constructs a new selection range containing only the index specified
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by the \a topLeft and the index \a bottomRight.
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*/
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/*!
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\fn QItemSelectionRange::QItemSelectionRange(const QModelIndex &index)
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Constructs a new selection range containing only the model item specified
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by the model index \a index.
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*/
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/*!
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\fn int QItemSelectionRange::top() const
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Returns the row index corresponding to the uppermost selected row in the
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selection range.
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*/
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/*!
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\fn int QItemSelectionRange::left() const
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Returns the column index corresponding to the leftmost selected column in the
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selection range.
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*/
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/*!
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\fn int QItemSelectionRange::bottom() const
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Returns the row index corresponding to the lowermost selected row in the
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selection range.
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*/
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/*!
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\fn int QItemSelectionRange::right() const
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Returns the column index corresponding to the rightmost selected column in
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the selection range.
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*/
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/*!
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\fn int QItemSelectionRange::width() const
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Returns the number of selected columns in the selection range.
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*/
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/*!
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\fn int QItemSelectionRange::height() const
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Returns the number of selected rows in the selection range.
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*/
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/*!
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\fn const QAbstractItemModel *QItemSelectionRange::model() const
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Returns the model that the items in the selection range belong to.
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*/
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/*!
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\fn QModelIndex QItemSelectionRange::topLeft() const
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Returns the index for the item located at the top-left corner of
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the selection range.
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\sa top(), left(), bottomRight()
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*/
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/*!
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\fn QModelIndex QItemSelectionRange::bottomRight() const
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Returns the index for the item located at the bottom-right corner
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of the selection range.
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\sa bottom(), right(), topLeft()
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*/
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/*!
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\fn QModelIndex QItemSelectionRange::parent() const
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Returns the parent model item index of the items in the selection range.
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*/
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/*!
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\fn bool QItemSelectionRange::contains(const QModelIndex &index) const
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Returns true if the model item specified by the \a index lies within the
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range of selected items; otherwise returns false.
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*/
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/*!
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\fn bool QItemSelectionRange::contains(int row, int column,
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const QModelIndex &parentIndex) const
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\overload
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Returns true if the model item specified by (\a row, \a column)
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and with \a parentIndex as the parent item lies within the range
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of selected items; otherwise returns false.
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*/
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/*!
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\fn bool QItemSelectionRange::intersects(const QItemSelectionRange &other) const
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Returns true if this selection range intersects (overlaps with) the \a other
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range given; otherwise returns false.
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*/
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bool QItemSelectionRange::intersects(const QItemSelectionRange &other) const
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{
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return (isValid() && other.isValid()
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&& parent() == other.parent()
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&& ((top() <= other.top() && bottom() >= other.top())
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|| (top() >= other.top() && top() <= other.bottom()))
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&& ((left() <= other.left() && right() >= other.left())
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|| (left() >= other.left() && left() <= other.right())));
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}
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/*!
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\fn QItemSelectionRange QItemSelectionRange::intersect(const QItemSelectionRange &other) const
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\obsolete
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Use intersected(\a other) instead.
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*/
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/*!
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\fn QItemSelectionRange QItemSelectionRange::intersected(const QItemSelectionRange &other) const
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\since 4.2
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Returns a new selection range containing only the items that are found in
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both the selection range and the \a other selection range.
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*/
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QItemSelectionRange QItemSelectionRange::intersect(const QItemSelectionRange &other) const
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{
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if (model() == other.model() && parent() == other.parent()) {
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QModelIndex topLeft = model()->index(qMax(top(), other.top()),
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qMax(left(), other.left()),
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other.parent());
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QModelIndex bottomRight = model()->index(qMin(bottom(), other.bottom()),
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qMin(right(), other.right()),
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other.parent());
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return QItemSelectionRange(topLeft, bottomRight);
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}
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return QItemSelectionRange();
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}
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/*!
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\fn bool QItemSelectionRange::operator==(const QItemSelectionRange &other) const
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Returns true if the selection range is exactly the same as the \a other
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range given; otherwise returns false.
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*/
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/*!
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\fn bool QItemSelectionRange::operator!=(const QItemSelectionRange &other) const
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Returns true if the selection range differs from the \a other range given;
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otherwise returns false.
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*/
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/*!
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\fn bool QItemSelectionRange::isValid() const
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Returns true if the selection range is valid; otherwise returns false.
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*/
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/*
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\internal
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utility function for getting the indexes from a range
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it avoid concatenating list and works on one
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*/
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static void indexesFromRange(const QItemSelectionRange &range, QModelIndexList &result)
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{
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if (range.isValid() && range.model()) {
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for (int column = range.left(); column <= range.right(); ++column) {
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for (int row = range.top(); row <= range.bottom(); ++row) {
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QModelIndex index = range.model()->index(row, column, range.parent());
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Qt::ItemFlags flags = range.model()->flags(index);
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if ((flags & Qt::ItemIsSelectable) && (flags & Qt::ItemIsEnabled))
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result.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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Returns the list of model index items stored in the selection.
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*/
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QModelIndexList QItemSelectionRange::indexes() const
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{
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QModelIndexList result;
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indexesFromRange(*this, result);
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return result;
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}
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/*!
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\class QItemSelection
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\brief The QItemSelection class manages information about selected items in a model.
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\ingroup model-view
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A QItemSelection describes the items in a model that have been
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selected by the user. A QItemSelection is basically a list of
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selection ranges, see QItemSelectionRange. It provides functions for
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creating and manipulating selections, and selecting a range of items
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from a model.
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The QItemSelection 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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An item selection can be constructed and initialized to contain a
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range of items from an existing model. The following example constructs
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a selection that contains a range of items from the given \c model,
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beginning at the \c topLeft, and ending at the \c bottomRight.
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\snippet doc/src/snippets/code/src_gui_itemviews_qitemselectionmodel.cpp 0
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An empty item selection can be constructed, and later populated as
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required. So, if the model is going to be unavailable when we construct
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the item selection, we can rewrite the above code in the following way:
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\snippet doc/src/snippets/code/src_gui_itemviews_qitemselectionmodel.cpp 1
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QItemSelection saves memory, and avoids unnecessary work, by working with
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selection ranges rather than recording the model item index for each
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item in the selection. Generally, an instance of this class will contain
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a list of non-overlapping selection ranges.
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Use merge() to merge one item selection into another without making
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overlapping ranges. Use split() to split one selection range into
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smaller ranges based on a another selection range.
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\sa {Model/View Programming}, QItemSelectionModel
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*/
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/*!
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\fn QItemSelection::QItemSelection()
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Constructs an empty selection.
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*/
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/*!
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Constructs an item selection that extends from the top-left model item,
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specified by the \a topLeft index, to the bottom-right item, specified
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by \a bottomRight.
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*/
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QItemSelection::QItemSelection(const QModelIndex &topLeft, const QModelIndex &bottomRight)
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{
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select(topLeft, bottomRight);
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}
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/*!
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Adds the items in the range that extends from the top-left model
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item, specified by the \a topLeft index, to the bottom-right item,
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specified by \a bottomRight to the list.
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\note \a topLeft and \a bottomRight must have the same parent.
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*/
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void QItemSelection::select(const QModelIndex &topLeft, const QModelIndex &bottomRight)
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{
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if (!topLeft.isValid() || !bottomRight.isValid())
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return;
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if ((topLeft.model() != bottomRight.model())
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|| topLeft.parent() != bottomRight.parent()) {
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qWarning("Can't select indexes from different model or with different parents");
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return;
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}
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if (topLeft.row() > bottomRight.row() || topLeft.column() > bottomRight.column()) {
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int top = qMin(topLeft.row(), bottomRight.row());
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int bottom = qMax(topLeft.row(), bottomRight.row());
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int left = qMin(topLeft.column(), bottomRight.column());
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int right = qMax(topLeft.column(), bottomRight.column());
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QModelIndex tl = topLeft.sibling(top, left);
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QModelIndex br = bottomRight.sibling(bottom, right);
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append(QItemSelectionRange(tl, br));
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return;
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}
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append(QItemSelectionRange(topLeft, bottomRight));
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}
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/*!
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Returns true if the selection contains the given \a index; otherwise
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returns false.
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*/
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bool QItemSelection::contains(const QModelIndex &index) const
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{
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if (index.flags() & Qt::ItemIsSelectable) {
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QList<QItemSelectionRange>::const_iterator it = begin();
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for (; it != end(); ++it)
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if ((*it).contains(index))
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return true;
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}
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return false;
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}
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/*!
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Returns a list of model indexes that correspond to the selected items.
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*/
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QModelIndexList QItemSelection::indexes() const
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{
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QModelIndexList result;
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QList<QItemSelectionRange>::const_iterator it = begin();
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for (; it != end(); ++it)
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indexesFromRange(*it, result);
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return result;
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}
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/*!
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Merges the \a other selection with this QItemSelection using the
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\a command given. This method guarantees that no ranges are overlapping.
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Note that only QItemSelectionModel::Select,
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QItemSelectionModel::Deselect, and QItemSelectionModel::Toggle are
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supported.
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\sa split()
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*/
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void QItemSelection::merge(const QItemSelection &other, QItemSelectionModel::SelectionFlags command)
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{
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if (other.isEmpty() ||
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!(command & QItemSelectionModel::Select ||
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command & QItemSelectionModel::Deselect ||
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command & QItemSelectionModel::Toggle))
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return;
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QItemSelection newSelection = other;
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// Collect intersections
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QItemSelection intersections;
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QItemSelection::iterator it = newSelection.begin();
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while (it != newSelection.end()) {
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if (!(*it).isValid()) {
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it = newSelection.erase(it);
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continue;
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}
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|
448 |
for (int t = 0; t < count(); ++t) {
|
|
449 |
if ((*it).intersects(at(t)))
|
|
450 |
intersections.append(at(t).intersected(*it));
|
|
451 |
}
|
|
452 |
++it;
|
|
453 |
}
|
|
454 |
|
|
455 |
// Split the old (and new) ranges using the intersections
|
|
456 |
for (int i = 0; i < intersections.count(); ++i) { // for each intersection
|
|
457 |
for (int t = 0; t < count();) { // splitt each old range
|
|
458 |
if (at(t).intersects(intersections.at(i))) {
|
|
459 |
split(at(t), intersections.at(i), this);
|
|
460 |
removeAt(t);
|
|
461 |
} else {
|
|
462 |
++t;
|
|
463 |
}
|
|
464 |
}
|
|
465 |
// only split newSelection if Toggle is specified
|
|
466 |
for (int n = 0; (command & QItemSelectionModel::Toggle) && n < newSelection.count();) {
|
|
467 |
if (newSelection.at(n).intersects(intersections.at(i))) {
|
|
468 |
split(newSelection.at(n), intersections.at(i), &newSelection);
|
|
469 |
newSelection.removeAt(n);
|
|
470 |
} else {
|
|
471 |
++n;
|
|
472 |
}
|
|
473 |
}
|
|
474 |
}
|
|
475 |
// do not add newSelection for Deselect
|
|
476 |
if (!(command & QItemSelectionModel::Deselect))
|
|
477 |
operator+=(newSelection);
|
|
478 |
}
|
|
479 |
|
|
480 |
/*!
|
|
481 |
Splits the selection \a range using the selection \a other range.
|
|
482 |
Removes all items in \a other from \a range and puts the result in \a result.
|
|
483 |
This can be compared with the semantics of the \e subtract operation of a set.
|
|
484 |
\sa merge()
|
|
485 |
*/
|
|
486 |
|
|
487 |
void QItemSelection::split(const QItemSelectionRange &range,
|
|
488 |
const QItemSelectionRange &other, QItemSelection *result)
|
|
489 |
{
|
|
490 |
if (range.parent() != other.parent())
|
|
491 |
return;
|
|
492 |
|
|
493 |
QModelIndex parent = other.parent();
|
|
494 |
int top = range.top();
|
|
495 |
int left = range.left();
|
|
496 |
int bottom = range.bottom();
|
|
497 |
int right = range.right();
|
|
498 |
int other_top = other.top();
|
|
499 |
int other_left = other.left();
|
|
500 |
int other_bottom = other.bottom();
|
|
501 |
int other_right = other.right();
|
|
502 |
const QAbstractItemModel *model = range.model();
|
|
503 |
Q_ASSERT(model);
|
|
504 |
if (other_top > top) {
|
|
505 |
QModelIndex tl = model->index(top, left, parent);
|
|
506 |
QModelIndex br = model->index(other_top - 1, right, parent);
|
|
507 |
result->append(QItemSelectionRange(tl, br));
|
|
508 |
top = other_top;
|
|
509 |
}
|
|
510 |
if (other_bottom < bottom) {
|
|
511 |
QModelIndex tl = model->index(other_bottom + 1, left, parent);
|
|
512 |
QModelIndex br = model->index(bottom, right, parent);
|
|
513 |
result->append(QItemSelectionRange(tl, br));
|
|
514 |
bottom = other_bottom;
|
|
515 |
}
|
|
516 |
if (other_left > left) {
|
|
517 |
QModelIndex tl = model->index(top, left, parent);
|
|
518 |
QModelIndex br = model->index(bottom, other_left - 1, parent);
|
|
519 |
result->append(QItemSelectionRange(tl, br));
|
|
520 |
left = other_left;
|
|
521 |
}
|
|
522 |
if (other_right < right) {
|
|
523 |
QModelIndex tl = model->index(top, other_right + 1, parent);
|
|
524 |
QModelIndex br = model->index(bottom, right, parent);
|
|
525 |
result->append(QItemSelectionRange(tl, br));
|
|
526 |
right = other_right;
|
|
527 |
}
|
|
528 |
}
|
|
529 |
|
|
530 |
/*!
|
|
531 |
\internal
|
|
532 |
|
|
533 |
returns a QItemSelection where all ranges have been expanded to:
|
|
534 |
Rows: left: 0 and right: columnCount()-1
|
|
535 |
Columns: top: 0 and bottom: rowCount()-1
|
|
536 |
*/
|
|
537 |
|
|
538 |
QItemSelection QItemSelectionModelPrivate::expandSelection(const QItemSelection &selection,
|
|
539 |
QItemSelectionModel::SelectionFlags command) const
|
|
540 |
{
|
|
541 |
if (selection.isEmpty() && !((command & QItemSelectionModel::Rows) ||
|
|
542 |
(command & QItemSelectionModel::Columns)))
|
|
543 |
return selection;
|
|
544 |
|
|
545 |
QItemSelection expanded;
|
|
546 |
if (command & QItemSelectionModel::Rows) {
|
|
547 |
for (int i = 0; i < selection.count(); ++i) {
|
|
548 |
QModelIndex parent = selection.at(i).parent();
|
|
549 |
int colCount = model->columnCount(parent);
|
|
550 |
QModelIndex tl = model->index(selection.at(i).top(), 0, parent);
|
|
551 |
QModelIndex br = model->index(selection.at(i).bottom(), colCount - 1, parent);
|
|
552 |
//we need to merge because the same row could have already been inserted
|
|
553 |
expanded.merge(QItemSelection(tl, br), QItemSelectionModel::Select);
|
|
554 |
}
|
|
555 |
}
|
|
556 |
if (command & QItemSelectionModel::Columns) {
|
|
557 |
for (int i = 0; i < selection.count(); ++i) {
|
|
558 |
QModelIndex parent = selection.at(i).parent();
|
|
559 |
int rowCount = model->rowCount(parent);
|
|
560 |
QModelIndex tl = model->index(0, selection.at(i).left(), parent);
|
|
561 |
QModelIndex br = model->index(rowCount - 1, selection.at(i).right(), parent);
|
|
562 |
//we need to merge because the same column could have already been inserted
|
|
563 |
expanded.merge(QItemSelection(tl, br), QItemSelectionModel::Select);
|
|
564 |
}
|
|
565 |
}
|
|
566 |
return expanded;
|
|
567 |
}
|
|
568 |
|
|
569 |
/*!
|
|
570 |
\internal
|
|
571 |
*/
|
|
572 |
void QItemSelectionModelPrivate::_q_rowsAboutToBeRemoved(const QModelIndex &parent,
|
|
573 |
int start, int end)
|
|
574 |
{
|
|
575 |
Q_Q(QItemSelectionModel);
|
|
576 |
finalize();
|
|
577 |
|
|
578 |
// update current index
|
|
579 |
if (currentIndex.isValid() && parent == currentIndex.parent()
|
|
580 |
&& currentIndex.row() >= start && currentIndex.row() <= end) {
|
|
581 |
QModelIndex old = currentIndex;
|
|
582 |
if (start > 0) // there are rows left above the change
|
|
583 |
currentIndex = model->index(start - 1, old.column(), parent);
|
|
584 |
else if (model && end < model->rowCount(parent) - 1) // there are rows left below the change
|
|
585 |
currentIndex = model->index(end + 1, old.column(), parent);
|
|
586 |
else // there are no rows left in the table
|
|
587 |
currentIndex = QModelIndex();
|
|
588 |
emit q->currentChanged(currentIndex, old);
|
|
589 |
emit q->currentRowChanged(currentIndex, old);
|
|
590 |
if (currentIndex.column() != old.column())
|
|
591 |
emit q->currentColumnChanged(currentIndex, old);
|
|
592 |
}
|
|
593 |
|
|
594 |
QItemSelection deselected;
|
|
595 |
QItemSelection::iterator it = ranges.begin();
|
|
596 |
while (it != ranges.end()) {
|
|
597 |
if (it->topLeft().parent() != parent) { // Check parents until reaching root or contained in range
|
|
598 |
QModelIndex itParent = it->topLeft().parent();
|
|
599 |
while (itParent.isValid() && itParent.parent() != parent)
|
|
600 |
itParent = itParent.parent();
|
|
601 |
|
|
602 |
if (parent.isValid() && start <= itParent.row() && itParent.row() <= end) {
|
|
603 |
deselected.append(*it);
|
|
604 |
it = ranges.erase(it);
|
|
605 |
} else {
|
|
606 |
++it;
|
|
607 |
}
|
|
608 |
} else if (start <= it->bottom() && it->bottom() <= end // Full inclusion
|
|
609 |
&& start <= it->top() && it->top() <= end) {
|
|
610 |
deselected.append(*it);
|
|
611 |
it = ranges.erase(it);
|
|
612 |
} else if (start <= it->top() && it->top() <= end) { // Top intersection
|
|
613 |
deselected.append(QItemSelectionRange(it->topLeft(), model->index(end, it->left(), it->parent())));
|
|
614 |
*it = QItemSelectionRange(model->index(end + 1, it->left(), it->parent()), it->bottomRight());
|
|
615 |
++it;
|
|
616 |
} else if (start <= it->bottom() && it->bottom() <= end) { // Bottom intersection
|
|
617 |
deselected.append(QItemSelectionRange(model->index(start, it->right(), it->parent()), it->bottomRight()));
|
|
618 |
*it = QItemSelectionRange(it->topLeft(), model->index(start - 1, it->right(), it->parent()));
|
|
619 |
++it;
|
|
620 |
} else {
|
|
621 |
if (it->top() < start && end < it->bottom()) // Middle intersection (do nothing)
|
|
622 |
deselected.append(QItemSelectionRange(model->index(start, it->right(), it->parent()),
|
|
623 |
model->index(end, it->left(), it->parent())));
|
|
624 |
++it;
|
|
625 |
}
|
|
626 |
}
|
|
627 |
|
|
628 |
if (!deselected.isEmpty())
|
|
629 |
emit q->selectionChanged(QItemSelection(), deselected);
|
|
630 |
}
|
|
631 |
|
|
632 |
/*!
|
|
633 |
\internal
|
|
634 |
*/
|
|
635 |
void QItemSelectionModelPrivate::_q_columnsAboutToBeRemoved(const QModelIndex &parent,
|
|
636 |
int start, int end)
|
|
637 |
{
|
|
638 |
Q_Q(QItemSelectionModel);
|
|
639 |
|
|
640 |
// update current index
|
|
641 |
if (currentIndex.isValid() && parent == currentIndex.parent()
|
|
642 |
&& currentIndex.column() >= start && currentIndex.column() <= end) {
|
|
643 |
QModelIndex old = currentIndex;
|
|
644 |
if (start > 0) // there are columns to the left of the change
|
|
645 |
currentIndex = model->index(old.row(), start - 1, parent);
|
|
646 |
else if (model && end < model->columnCount() - 1) // there are columns to the right of the change
|
|
647 |
currentIndex = model->index(old.row(), end + 1, parent);
|
|
648 |
else // there are no columns left in the table
|
|
649 |
currentIndex = QModelIndex();
|
|
650 |
emit q->currentChanged(currentIndex, old);
|
|
651 |
if (currentIndex.row() != old.row())
|
|
652 |
emit q->currentRowChanged(currentIndex, old);
|
|
653 |
emit q->currentColumnChanged(currentIndex, old);
|
|
654 |
}
|
|
655 |
|
|
656 |
// update selections
|
|
657 |
QModelIndex tl = model->index(0, start, parent);
|
|
658 |
QModelIndex br = model->index(model->rowCount(parent) - 1, end, parent);
|
|
659 |
q->select(QItemSelection(tl, br), QItemSelectionModel::Deselect);
|
|
660 |
finalize();
|
|
661 |
}
|
|
662 |
|
|
663 |
/*!
|
|
664 |
\internal
|
|
665 |
|
|
666 |
Split selection ranges if columns are about to be inserted in the middle.
|
|
667 |
*/
|
|
668 |
void QItemSelectionModelPrivate::_q_columnsAboutToBeInserted(const QModelIndex &parent,
|
|
669 |
int start, int end)
|
|
670 |
{
|
|
671 |
Q_UNUSED(end);
|
|
672 |
finalize();
|
|
673 |
QList<QItemSelectionRange> split;
|
|
674 |
QList<QItemSelectionRange>::iterator it = ranges.begin();
|
|
675 |
for (; it != ranges.end(); ) {
|
|
676 |
if ((*it).isValid() && (*it).parent() == parent
|
|
677 |
&& (*it).left() < start && (*it).right() >= start) {
|
|
678 |
QModelIndex bottomMiddle = model->index((*it).bottom(), start - 1, (*it).parent());
|
|
679 |
QItemSelectionRange left((*it).topLeft(), bottomMiddle);
|
|
680 |
QModelIndex topMiddle = model->index((*it).top(), start, (*it).parent());
|
|
681 |
QItemSelectionRange right(topMiddle, (*it).bottomRight());
|
|
682 |
it = ranges.erase(it);
|
|
683 |
split.append(left);
|
|
684 |
split.append(right);
|
|
685 |
} else {
|
|
686 |
++it;
|
|
687 |
}
|
|
688 |
}
|
|
689 |
ranges += split;
|
|
690 |
}
|
|
691 |
|
|
692 |
/*!
|
|
693 |
\internal
|
|
694 |
|
|
695 |
Split selection ranges if rows are about to be inserted in the middle.
|
|
696 |
*/
|
|
697 |
void QItemSelectionModelPrivate::_q_rowsAboutToBeInserted(const QModelIndex &parent,
|
|
698 |
int start, int end)
|
|
699 |
{
|
|
700 |
Q_UNUSED(end);
|
|
701 |
finalize();
|
|
702 |
QList<QItemSelectionRange> split;
|
|
703 |
QList<QItemSelectionRange>::iterator it = ranges.begin();
|
|
704 |
for (; it != ranges.end(); ) {
|
|
705 |
if ((*it).isValid() && (*it).parent() == parent
|
|
706 |
&& (*it).top() < start && (*it).bottom() >= start) {
|
|
707 |
QModelIndex middleRight = model->index(start - 1, (*it).right(), (*it).parent());
|
|
708 |
QItemSelectionRange top((*it).topLeft(), middleRight);
|
|
709 |
QModelIndex middleLeft = model->index(start, (*it).left(), (*it).parent());
|
|
710 |
QItemSelectionRange bottom(middleLeft, (*it).bottomRight());
|
|
711 |
it = ranges.erase(it);
|
|
712 |
split.append(top);
|
|
713 |
split.append(bottom);
|
|
714 |
} else {
|
|
715 |
++it;
|
|
716 |
}
|
|
717 |
}
|
|
718 |
ranges += split;
|
|
719 |
}
|
|
720 |
|
|
721 |
/*!
|
|
722 |
\internal
|
|
723 |
|
|
724 |
Split selection into individual (persistent) indexes. This is done in
|
|
725 |
preparation for the layoutChanged() signal, where the indexes can be
|
|
726 |
merged again.
|
|
727 |
*/
|
|
728 |
void QItemSelectionModelPrivate::_q_layoutAboutToBeChanged()
|
|
729 |
{
|
|
730 |
savedPersistentIndexes.clear();
|
|
731 |
savedPersistentCurrentIndexes.clear();
|
|
732 |
|
|
733 |
// special case for when all indexes are selected
|
|
734 |
if (ranges.isEmpty() && currentSelection.count() == 1) {
|
|
735 |
QItemSelectionRange range = currentSelection.first();
|
|
736 |
QModelIndex parent = range.parent();
|
|
737 |
tableRowCount = model->rowCount(parent);
|
|
738 |
tableColCount = model->columnCount(parent);
|
|
739 |
if (tableRowCount * tableColCount > 100
|
|
740 |
&& range.top() == 0
|
|
741 |
&& range.left() == 0
|
|
742 |
&& range.bottom() == tableRowCount - 1
|
|
743 |
&& range.right() == tableColCount - 1) {
|
|
744 |
tableSelected = true;
|
|
745 |
tableParent = parent;
|
|
746 |
return;
|
|
747 |
}
|
|
748 |
}
|
|
749 |
tableSelected = false;
|
|
750 |
|
|
751 |
QModelIndexList indexes = ranges.indexes();
|
|
752 |
QModelIndexList::const_iterator it;
|
|
753 |
for (it = indexes.constBegin(); it != indexes.constEnd(); ++it)
|
|
754 |
savedPersistentIndexes.append(QPersistentModelIndex(*it));
|
|
755 |
indexes = currentSelection.indexes();
|
|
756 |
for (it = indexes.constBegin(); it != indexes.constEnd(); ++it)
|
|
757 |
savedPersistentCurrentIndexes.append(QPersistentModelIndex(*it));
|
|
758 |
}
|
|
759 |
|
|
760 |
/*!
|
|
761 |
\internal
|
|
762 |
|
|
763 |
Merges \a indexes into an item selection made up of ranges.
|
|
764 |
Assumes that the indexes are sorted.
|
|
765 |
*/
|
|
766 |
static QItemSelection mergeIndexes(const QList<QPersistentModelIndex> &indexes)
|
|
767 |
{
|
|
768 |
QItemSelection colSpans;
|
|
769 |
// merge columns
|
|
770 |
int i = 0;
|
|
771 |
while (i < indexes.count()) {
|
|
772 |
QModelIndex tl = indexes.at(i);
|
|
773 |
QModelIndex br = tl;
|
|
774 |
while (++i < indexes.count()) {
|
|
775 |
QModelIndex next = indexes.at(i);
|
|
776 |
if ((next.parent() == br.parent())
|
|
777 |
&& (next.row() == br.row())
|
|
778 |
&& (next.column() == br.column() + 1))
|
|
779 |
br = next;
|
|
780 |
else
|
|
781 |
break;
|
|
782 |
}
|
|
783 |
colSpans.append(QItemSelectionRange(tl, br));
|
|
784 |
}
|
|
785 |
// merge rows
|
|
786 |
QItemSelection rowSpans;
|
|
787 |
i = 0;
|
|
788 |
while (i < colSpans.count()) {
|
|
789 |
QModelIndex tl = colSpans.at(i).topLeft();
|
|
790 |
QModelIndex br = colSpans.at(i).bottomRight();
|
|
791 |
QModelIndex prevTl = tl;
|
|
792 |
while (++i < colSpans.count()) {
|
|
793 |
QModelIndex nextTl = colSpans.at(i).topLeft();
|
|
794 |
QModelIndex nextBr = colSpans.at(i).bottomRight();
|
|
795 |
if ((nextTl.column() == prevTl.column()) && (nextBr.column() == br.column())
|
|
796 |
&& (nextTl.row() == prevTl.row() + 1) && (nextBr.row() == br.row() + 1)) {
|
|
797 |
br = nextBr;
|
|
798 |
prevTl = nextTl;
|
|
799 |
} else {
|
|
800 |
break;
|
|
801 |
}
|
|
802 |
}
|
|
803 |
rowSpans.append(QItemSelectionRange(tl, br));
|
|
804 |
}
|
|
805 |
return rowSpans;
|
|
806 |
}
|
|
807 |
|
|
808 |
/*!
|
|
809 |
\internal
|
|
810 |
|
|
811 |
Merge the selected indexes into selection ranges again.
|
|
812 |
*/
|
|
813 |
void QItemSelectionModelPrivate::_q_layoutChanged()
|
|
814 |
{
|
|
815 |
// special case for when all indexes are selected
|
|
816 |
if (tableSelected && tableColCount == model->columnCount(tableParent)
|
|
817 |
&& tableRowCount == model->rowCount(tableParent)) {
|
|
818 |
ranges.clear();
|
|
819 |
currentSelection.clear();
|
|
820 |
int bottom = tableRowCount - 1;
|
|
821 |
int right = tableColCount - 1;
|
|
822 |
QModelIndex tl = model->index(0, 0, tableParent);
|
|
823 |
QModelIndex br = model->index(bottom, right, tableParent);
|
|
824 |
currentSelection << QItemSelectionRange(tl, br);
|
|
825 |
tableParent = QModelIndex();
|
|
826 |
tableSelected = false;
|
|
827 |
return;
|
|
828 |
}
|
|
829 |
|
|
830 |
if (savedPersistentCurrentIndexes.isEmpty() && savedPersistentIndexes.isEmpty()) {
|
|
831 |
// either the selection was actually empty, or we
|
|
832 |
// didn't get the layoutAboutToBeChanged() signal
|
|
833 |
return;
|
|
834 |
}
|
|
835 |
// clear the "old" selection
|
|
836 |
ranges.clear();
|
|
837 |
currentSelection.clear();
|
|
838 |
|
|
839 |
// sort the "new" selection, as preparation for merging
|
|
840 |
qStableSort(savedPersistentIndexes.begin(), savedPersistentIndexes.end());
|
|
841 |
qStableSort(savedPersistentCurrentIndexes.begin(), savedPersistentCurrentIndexes.end());
|
|
842 |
|
|
843 |
// update the selection by merging the individual indexes
|
|
844 |
ranges = mergeIndexes(savedPersistentIndexes);
|
|
845 |
currentSelection = mergeIndexes(savedPersistentCurrentIndexes);
|
|
846 |
|
|
847 |
// release the persistent indexes
|
|
848 |
savedPersistentIndexes.clear();
|
|
849 |
savedPersistentCurrentIndexes.clear();
|
|
850 |
}
|
|
851 |
|
|
852 |
/*!
|
|
853 |
\class QItemSelectionModel
|
|
854 |
|
|
855 |
\brief The QItemSelectionModel class keeps track of a view's selected items.
|
|
856 |
|
|
857 |
\ingroup model-view
|
|
858 |
|
|
859 |
A QItemSelectionModel keeps track of the selected items in a view, or
|
|
860 |
in several views onto the same model. It also keeps track of the
|
|
861 |
currently selected item in a view.
|
|
862 |
|
|
863 |
The QItemSelectionModel class is one of the \l{Model/View Classes}
|
|
864 |
and is part of Qt's \l{Model/View Programming}{model/view framework}.
|
|
865 |
|
|
866 |
The selected items are stored using ranges. Whenever you want to
|
|
867 |
modify the selected items use select() and provide either a
|
|
868 |
QItemSelection, or a QModelIndex and a QItemSelectionModel::SelectionFlag.
|
|
869 |
|
|
870 |
The QItemSelectionModel takes a two layer approach to selection
|
|
871 |
management, dealing with both selected items that have been committed
|
|
872 |
and items that are part of the current selection. The current
|
|
873 |
selected items are part of the current interactive selection (for
|
|
874 |
example with rubber-band selection or keyboard-shift selections).
|
|
875 |
|
|
876 |
To update the currently selected items, use the bitwise OR of
|
|
877 |
QItemSelectionModel::Current and any of the other SelectionFlags.
|
|
878 |
If you omit the QItemSelectionModel::Current command, a new current
|
|
879 |
selection will be created, and the previous one added to the whole
|
|
880 |
selection. All functions operate on both layers; for example,
|
|
881 |
selectedItems() will return items from both layers.
|
|
882 |
|
|
883 |
\sa {Model/View Programming}, QAbstractItemModel, {Chart Example}
|
|
884 |
*/
|
|
885 |
|
|
886 |
/*!
|
|
887 |
Constructs a selection model that operates on the specified item \a model.
|
|
888 |
*/
|
|
889 |
QItemSelectionModel::QItemSelectionModel(QAbstractItemModel *model)
|
|
890 |
: QObject(*new QItemSelectionModelPrivate, model)
|
|
891 |
{
|
|
892 |
d_func()->model = model;
|
|
893 |
if (model) {
|
|
894 |
connect(model, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),
|
|
895 |
this, SLOT(_q_rowsAboutToBeRemoved(QModelIndex,int,int)));
|
|
896 |
connect(model, SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)),
|
|
897 |
this, SLOT(_q_columnsAboutToBeRemoved(QModelIndex,int,int)));
|
|
898 |
connect(model, SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)),
|
|
899 |
this, SLOT(_q_rowsAboutToBeInserted(QModelIndex,int,int)));
|
|
900 |
connect(model, SIGNAL(columnsAboutToBeInserted(QModelIndex,int,int)),
|
|
901 |
this, SLOT(_q_columnsAboutToBeInserted(QModelIndex,int,int)));
|
|
902 |
connect(model, SIGNAL(layoutAboutToBeChanged()),
|
|
903 |
this, SLOT(_q_layoutAboutToBeChanged()));
|
|
904 |
connect(model, SIGNAL(layoutChanged()),
|
|
905 |
this, SLOT(_q_layoutChanged()));
|
|
906 |
}
|
|
907 |
}
|
|
908 |
|
|
909 |
/*!
|
|
910 |
Constructs a selection model that operates on the specified item \a model with \a parent.
|
|
911 |
*/
|
|
912 |
QItemSelectionModel::QItemSelectionModel(QAbstractItemModel *model, QObject *parent)
|
|
913 |
: QObject(*new QItemSelectionModelPrivate, parent)
|
|
914 |
{
|
|
915 |
d_func()->model = model;
|
|
916 |
if (model) {
|
|
917 |
connect(model, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),
|
|
918 |
this, SLOT(_q_rowsAboutToBeRemoved(QModelIndex,int,int)));
|
|
919 |
connect(model, SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)),
|
|
920 |
this, SLOT(_q_columnsAboutToBeRemoved(QModelIndex,int,int)));
|
|
921 |
connect(model, SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)),
|
|
922 |
this, SLOT(_q_rowsAboutToBeInserted(QModelIndex,int,int)));
|
|
923 |
connect(model, SIGNAL(columnsAboutToBeInserted(QModelIndex,int,int)),
|
|
924 |
this, SLOT(_q_columnsAboutToBeInserted(QModelIndex,int,int)));
|
|
925 |
connect(model, SIGNAL(layoutAboutToBeChanged()),
|
|
926 |
this, SLOT(_q_layoutAboutToBeChanged()));
|
|
927 |
connect(model, SIGNAL(layoutChanged()),
|
|
928 |
this, SLOT(_q_layoutChanged()));
|
|
929 |
}
|
|
930 |
}
|
|
931 |
|
|
932 |
/*!
|
|
933 |
\internal
|
|
934 |
*/
|
|
935 |
QItemSelectionModel::QItemSelectionModel(QItemSelectionModelPrivate &dd, QAbstractItemModel *model)
|
|
936 |
: QObject(dd, model)
|
|
937 |
{
|
|
938 |
d_func()->model = model;
|
|
939 |
if (model) {
|
|
940 |
connect(model, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),
|
|
941 |
this, SLOT(_q_rowsAboutToBeRemoved(QModelIndex,int,int)));
|
|
942 |
connect(model, SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)),
|
|
943 |
this, SLOT(_q_columnsAboutToBeRemoved(QModelIndex,int,int)));
|
|
944 |
connect(model, SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)),
|
|
945 |
this, SLOT(_q_rowsAboutToBeInserted(QModelIndex,int,int)));
|
|
946 |
connect(model, SIGNAL(columnsAboutToBeInserted(QModelIndex,int,int)),
|
|
947 |
this, SLOT(_q_columnsAboutToBeInserted(QModelIndex,int,int)));
|
|
948 |
connect(model, SIGNAL(layoutAboutToBeChanged()),
|
|
949 |
this, SLOT(_q_layoutAboutToBeChanged()));
|
|
950 |
connect(model, SIGNAL(layoutChanged()),
|
|
951 |
this, SLOT(_q_layoutChanged()));
|
|
952 |
}
|
|
953 |
}
|
|
954 |
|
|
955 |
/*!
|
|
956 |
Destroys the selection model.
|
|
957 |
*/
|
|
958 |
QItemSelectionModel::~QItemSelectionModel()
|
|
959 |
{
|
|
960 |
Q_D(QItemSelectionModel);
|
|
961 |
if (d->model) {
|
|
962 |
disconnect(d->model, SIGNAL(rowsAboutToBeRemoved(QModelIndex,int,int)),
|
|
963 |
this, SLOT(_q_rowsAboutToBeRemoved(QModelIndex,int,int)));
|
|
964 |
disconnect(d->model, SIGNAL(columnsAboutToBeRemoved(QModelIndex,int,int)),
|
|
965 |
this, SLOT(_q_columnsAboutToBeRemoved(QModelIndex,int,int)));
|
|
966 |
disconnect(d->model, SIGNAL(rowsAboutToBeInserted(QModelIndex,int,int)),
|
|
967 |
this, SLOT(_q_rowsAboutToBeInserted(QModelIndex,int,int)));
|
|
968 |
disconnect(d->model, SIGNAL(columnsAboutToBeInserted(QModelIndex,int,int)),
|
|
969 |
this, SLOT(_q_columnsAboutToBeInserted(QModelIndex,int,int)));
|
|
970 |
disconnect(d->model, SIGNAL(layoutAboutToBeChanged()),
|
|
971 |
this, SLOT(_q_layoutAboutToBeChanged()));
|
|
972 |
disconnect(d->model, SIGNAL(layoutChanged()),
|
|
973 |
this, SLOT(_q_layoutChanged()));
|
|
974 |
}
|
|
975 |
}
|
|
976 |
|
|
977 |
/*!
|
|
978 |
Selects the model item \a index using the specified \a command, and emits
|
|
979 |
selectionChanged().
|
|
980 |
|
|
981 |
\sa QItemSelectionModel::SelectionFlags
|
|
982 |
*/
|
|
983 |
void QItemSelectionModel::select(const QModelIndex &index, QItemSelectionModel::SelectionFlags command)
|
|
984 |
{
|
|
985 |
QItemSelection selection(index, index);
|
|
986 |
select(selection, command);
|
|
987 |
}
|
|
988 |
|
|
989 |
/*!
|
|
990 |
\fn void QItemSelectionModel::currentChanged(const QModelIndex ¤t, const QModelIndex &previous)
|
|
991 |
|
|
992 |
This signal is emitted whenever the current item changes. The \a previous
|
|
993 |
model item index is replaced by the \a current index as the selection's
|
|
994 |
current item.
|
|
995 |
|
|
996 |
Note that this signal will not be emitted when the item model is reset.
|
|
997 |
|
|
998 |
\sa currentIndex() setCurrentIndex() selectionChanged()
|
|
999 |
*/
|
|
1000 |
|
|
1001 |
/*!
|
|
1002 |
\fn void QItemSelectionModel::currentColumnChanged(const QModelIndex ¤t, const QModelIndex &previous)
|
|
1003 |
|
|
1004 |
This signal is emitted if the \a current item changes and its column is
|
|
1005 |
different to the column of the \a previous current item.
|
|
1006 |
|
|
1007 |
Note that this signal will not be emitted when the item model is reset.
|
|
1008 |
|
|
1009 |
\sa currentChanged() currentRowChanged() currentIndex() setCurrentIndex()
|
|
1010 |
*/
|
|
1011 |
|
|
1012 |
/*!
|
|
1013 |
\fn void QItemSelectionModel::currentRowChanged(const QModelIndex ¤t, const QModelIndex &previous)
|
|
1014 |
|
|
1015 |
This signal is emitted if the \a current item changes and its row is
|
|
1016 |
different to the row of the \a previous current item.
|
|
1017 |
|
|
1018 |
Note that this signal will not be emitted when the item model is reset.
|
|
1019 |
|
|
1020 |
\sa currentChanged() currentColumnChanged() currentIndex() setCurrentIndex()
|
|
1021 |
*/
|
|
1022 |
|
|
1023 |
/*!
|
|
1024 |
\fn void QItemSelectionModel::selectionChanged(const QItemSelection &selected, const QItemSelection &deselected)
|
|
1025 |
|
|
1026 |
This signal is emitted whenever the selection changes. The change in the
|
|
1027 |
selection is represented as an item selection of \a deselected items and
|
|
1028 |
an item selection of \a selected items.
|
|
1029 |
|
|
1030 |
Note the that the current index changes independently from the selection.
|
|
1031 |
Also note that this signal will not be emitted when the item model is reset.
|
|
1032 |
|
|
1033 |
\sa select() currentChanged()
|
|
1034 |
*/
|
|
1035 |
|
|
1036 |
/*!
|
|
1037 |
\enum QItemSelectionModel::SelectionFlag
|
|
1038 |
|
|
1039 |
This enum describes the way the selection model will be updated.
|
|
1040 |
|
|
1041 |
\value NoUpdate No selection will be made.
|
|
1042 |
\value Clear The complete selection will be cleared.
|
|
1043 |
\value Select All specified indexes will be selected.
|
|
1044 |
\value Deselect All specified indexes will be deselected.
|
|
1045 |
\value Toggle All specified indexes will be selected or
|
|
1046 |
deselected depending on their current state.
|
|
1047 |
\value Current The current selection will be updated.
|
|
1048 |
\value Rows All indexes will be expanded to span rows.
|
|
1049 |
\value Columns All indexes will be expanded to span columns.
|
|
1050 |
\value SelectCurrent A combination of Select and Current, provided for
|
|
1051 |
convenience.
|
|
1052 |
\value ToggleCurrent A combination of Toggle and Current, provided for
|
|
1053 |
convenience.
|
|
1054 |
\value ClearAndSelect A combination of Clear and Select, provided for
|
|
1055 |
convenience.
|
|
1056 |
*/
|
|
1057 |
|
|
1058 |
/*!
|
|
1059 |
Selects the item \a selection using the specified \a command, and emits
|
|
1060 |
selectionChanged().
|
|
1061 |
|
|
1062 |
\sa QItemSelectionModel::SelectionFlag
|
|
1063 |
*/
|
|
1064 |
void QItemSelectionModel::select(const QItemSelection &selection, QItemSelectionModel::SelectionFlags command)
|
|
1065 |
{
|
|
1066 |
Q_D(QItemSelectionModel);
|
|
1067 |
if (command == NoUpdate)
|
|
1068 |
return;
|
|
1069 |
|
|
1070 |
// store old selection
|
|
1071 |
QItemSelection sel = selection;
|
|
1072 |
QItemSelection old = d->ranges;
|
|
1073 |
old.merge(d->currentSelection, d->currentCommand);
|
|
1074 |
|
|
1075 |
// expand selection according to SelectionBehavior
|
|
1076 |
if (command & Rows || command & Columns)
|
|
1077 |
sel = d->expandSelection(sel, command);
|
|
1078 |
|
|
1079 |
// clear ranges and currentSelection
|
|
1080 |
if (command & Clear) {
|
|
1081 |
d->ranges.clear();
|
|
1082 |
d->currentSelection.clear();
|
|
1083 |
}
|
|
1084 |
|
|
1085 |
// merge and clear currentSelection if Current was not set (ie. start new currentSelection)
|
|
1086 |
if (!(command & Current))
|
|
1087 |
d->finalize();
|
|
1088 |
|
|
1089 |
// update currentSelection
|
|
1090 |
if (command & Toggle || command & Select || command & Deselect) {
|
|
1091 |
d->currentCommand = command;
|
|
1092 |
d->currentSelection = sel;
|
|
1093 |
}
|
|
1094 |
|
|
1095 |
// generate new selection, compare with old and emit selectionChanged()
|
|
1096 |
QItemSelection newSelection = d->ranges;
|
|
1097 |
newSelection.merge(d->currentSelection, d->currentCommand);
|
|
1098 |
emitSelectionChanged(newSelection, old);
|
|
1099 |
}
|
|
1100 |
|
|
1101 |
/*!
|
|
1102 |
Clears the selection model. Emits selectionChanged() and currentChanged().
|
|
1103 |
*/
|
|
1104 |
void QItemSelectionModel::clear()
|
|
1105 |
{
|
|
1106 |
Q_D(QItemSelectionModel);
|
|
1107 |
clearSelection();
|
|
1108 |
QModelIndex previous = d->currentIndex;
|
|
1109 |
d->currentIndex = QModelIndex();
|
|
1110 |
if (previous.isValid()) {
|
|
1111 |
emit currentChanged(d->currentIndex, previous);
|
|
1112 |
emit currentRowChanged(d->currentIndex, previous);
|
|
1113 |
emit currentColumnChanged(d->currentIndex, previous);
|
|
1114 |
}
|
|
1115 |
}
|
|
1116 |
|
|
1117 |
/*!
|
|
1118 |
Clears the selection model. Does not emit any signals.
|
|
1119 |
*/
|
|
1120 |
void QItemSelectionModel::reset()
|
|
1121 |
{
|
|
1122 |
bool block = blockSignals(true);
|
|
1123 |
clear();
|
|
1124 |
blockSignals(block);
|
|
1125 |
}
|
|
1126 |
|
|
1127 |
/*!
|
|
1128 |
\since 4.2
|
|
1129 |
Clears the selection in the selection model. Emits selectionChanged().
|
|
1130 |
*/
|
|
1131 |
void QItemSelectionModel::clearSelection()
|
|
1132 |
{
|
|
1133 |
Q_D(QItemSelectionModel);
|
|
1134 |
if (d->ranges.count() == 0 && d->currentSelection.count() == 0)
|
|
1135 |
return;
|
|
1136 |
QItemSelection selection = d->ranges;
|
|
1137 |
selection.merge(d->currentSelection, d->currentCommand);
|
|
1138 |
d->ranges.clear();
|
|
1139 |
d->currentSelection.clear();
|
|
1140 |
emit selectionChanged(QItemSelection(), selection);
|
|
1141 |
}
|
|
1142 |
|
|
1143 |
|
|
1144 |
/*!
|
|
1145 |
Sets the model item \a index to be the current item, and emits
|
|
1146 |
currentChanged(). The current item is used for keyboard navigation and
|
|
1147 |
focus indication; it is independent of any selected items, although a
|
|
1148 |
selected item can also be the current item.
|
|
1149 |
|
|
1150 |
Depending on the specified \a command, the \a index can also become part
|
|
1151 |
of the current selection.
|
|
1152 |
\sa select()
|
|
1153 |
*/
|
|
1154 |
void QItemSelectionModel::setCurrentIndex(const QModelIndex &index, QItemSelectionModel::SelectionFlags command)
|
|
1155 |
{
|
|
1156 |
Q_D(QItemSelectionModel);
|
|
1157 |
if (index == d->currentIndex) {
|
|
1158 |
if (command != NoUpdate)
|
|
1159 |
select(index, command); // select item
|
|
1160 |
return;
|
|
1161 |
}
|
|
1162 |
QPersistentModelIndex previous = d->currentIndex;
|
|
1163 |
d->currentIndex = index; // set current before emitting selection changed below
|
|
1164 |
if (command != NoUpdate)
|
|
1165 |
select(d->currentIndex, command); // select item
|
|
1166 |
emit currentChanged(d->currentIndex, previous);
|
|
1167 |
if (d->currentIndex.row() != previous.row() ||
|
|
1168 |
d->currentIndex.parent() != previous.parent())
|
|
1169 |
emit currentRowChanged(d->currentIndex, previous);
|
|
1170 |
if (d->currentIndex.column() != previous.column() ||
|
|
1171 |
d->currentIndex.parent() != previous.parent())
|
|
1172 |
emit currentColumnChanged(d->currentIndex, previous);
|
|
1173 |
}
|
|
1174 |
|
|
1175 |
/*!
|
|
1176 |
Returns the model item index for the current item, or an invalid index
|
|
1177 |
if there is no current item.
|
|
1178 |
*/
|
|
1179 |
QModelIndex QItemSelectionModel::currentIndex() const
|
|
1180 |
{
|
|
1181 |
return static_cast<QModelIndex>(d_func()->currentIndex);
|
|
1182 |
}
|
|
1183 |
|
|
1184 |
/*!
|
|
1185 |
Returns true if the given model item \a index is selected.
|
|
1186 |
*/
|
|
1187 |
bool QItemSelectionModel::isSelected(const QModelIndex &index) const
|
|
1188 |
{
|
|
1189 |
Q_D(const QItemSelectionModel);
|
|
1190 |
if (d->model != index.model() || !index.isValid())
|
|
1191 |
return false;
|
|
1192 |
|
|
1193 |
bool selected = false;
|
|
1194 |
// search model ranges
|
|
1195 |
QList<QItemSelectionRange>::const_iterator it = d->ranges.begin();
|
|
1196 |
for (; it != d->ranges.end(); ++it) {
|
|
1197 |
if ((*it).isValid() && (*it).contains(index)) {
|
|
1198 |
selected = true;
|
|
1199 |
break;
|
|
1200 |
}
|
|
1201 |
}
|
|
1202 |
|
|
1203 |
// check currentSelection
|
|
1204 |
if (d->currentSelection.count()) {
|
|
1205 |
if ((d->currentCommand & Deselect) && selected)
|
|
1206 |
selected = !d->currentSelection.contains(index);
|
|
1207 |
else if (d->currentCommand & Toggle)
|
|
1208 |
selected ^= d->currentSelection.contains(index);
|
|
1209 |
else if ((d->currentCommand & Select) && !selected)
|
|
1210 |
selected = d->currentSelection.contains(index);
|
|
1211 |
}
|
|
1212 |
|
|
1213 |
if (selected) {
|
|
1214 |
Qt::ItemFlags flags = d->model->flags(index);
|
|
1215 |
return (flags & Qt::ItemIsSelectable);
|
|
1216 |
}
|
|
1217 |
|
|
1218 |
return false;
|
|
1219 |
}
|
|
1220 |
|
|
1221 |
/*!
|
|
1222 |
Returns true if all items are selected in the \a row with the given
|
|
1223 |
\a parent.
|
|
1224 |
|
|
1225 |
Note that this function is usually faster than calling isSelected()
|
|
1226 |
on all items in the same row and that unselectable items are
|
|
1227 |
ignored.
|
|
1228 |
*/
|
|
1229 |
bool QItemSelectionModel::isRowSelected(int row, const QModelIndex &parent) const
|
|
1230 |
{
|
|
1231 |
Q_D(const QItemSelectionModel);
|
|
1232 |
if (parent.isValid() && d->model != parent.model())
|
|
1233 |
return false;
|
|
1234 |
|
|
1235 |
// return false if row exist in currentSelection (Deselect)
|
|
1236 |
if (d->currentCommand & Deselect && d->currentSelection.count()) {
|
|
1237 |
for (int i=0; i<d->currentSelection.count(); ++i) {
|
|
1238 |
if (d->currentSelection.at(i).parent() == parent &&
|
|
1239 |
row >= d->currentSelection.at(i).top() &&
|
|
1240 |
row <= d->currentSelection.at(i).bottom())
|
|
1241 |
return false;
|
|
1242 |
}
|
|
1243 |
}
|
|
1244 |
// return false if ranges in both currentSelection and ranges
|
|
1245 |
// intersect and have the same row contained
|
|
1246 |
if (d->currentCommand & Toggle && d->currentSelection.count()) {
|
|
1247 |
for (int i=0; i<d->currentSelection.count(); ++i)
|
|
1248 |
if (d->currentSelection.at(i).top() <= row &&
|
|
1249 |
d->currentSelection.at(i).bottom() >= row)
|
|
1250 |
for (int j=0; j<d->ranges.count(); ++j)
|
|
1251 |
if (d->ranges.at(j).top() <= row && d->ranges.at(j).bottom() >= row
|
|
1252 |
&& d->currentSelection.at(i).intersected(d->ranges.at(j)).isValid())
|
|
1253 |
return false;
|
|
1254 |
}
|
|
1255 |
// add ranges and currentSelection and check through them all
|
|
1256 |
QList<QItemSelectionRange>::const_iterator it;
|
|
1257 |
QList<QItemSelectionRange> joined = d->ranges;
|
|
1258 |
if (d->currentSelection.count())
|
|
1259 |
joined += d->currentSelection;
|
|
1260 |
int colCount = d->model->columnCount(parent);
|
|
1261 |
for (int column = 0; column < colCount; ++column) {
|
|
1262 |
for (it = joined.constBegin(); it != joined.constEnd(); ++it) {
|
|
1263 |
if ((*it).contains(row, column, parent)) {
|
|
1264 |
bool selectable = false;
|
|
1265 |
for (int i = column; !selectable && i <= (*it).right(); ++i) {
|
|
1266 |
Qt::ItemFlags flags = d->model->index(row, i, parent).flags();
|
|
1267 |
selectable = flags & Qt::ItemIsSelectable;
|
|
1268 |
}
|
|
1269 |
if (selectable){
|
|
1270 |
column = qMax(column, (*it).right());
|
|
1271 |
break;
|
|
1272 |
}
|
|
1273 |
}
|
|
1274 |
}
|
|
1275 |
if (it == joined.constEnd())
|
|
1276 |
return false;
|
|
1277 |
}
|
|
1278 |
return colCount > 0; // no columns means no selected items
|
|
1279 |
}
|
|
1280 |
|
|
1281 |
/*!
|
|
1282 |
Returns true if all items are selected in the \a column with the given
|
|
1283 |
\a parent.
|
|
1284 |
|
|
1285 |
Note that this function is usually faster than calling isSelected()
|
|
1286 |
on all items in the same column and that unselectable items are
|
|
1287 |
ignored.
|
|
1288 |
*/
|
|
1289 |
bool QItemSelectionModel::isColumnSelected(int column, const QModelIndex &parent) const
|
|
1290 |
{
|
|
1291 |
Q_D(const QItemSelectionModel);
|
|
1292 |
if (parent.isValid() && d->model != parent.model())
|
|
1293 |
return false;
|
|
1294 |
|
|
1295 |
// return false if column exist in currentSelection (Deselect)
|
|
1296 |
if (d->currentCommand & Deselect && d->currentSelection.count()) {
|
|
1297 |
for (int i = 0; i < d->currentSelection.count(); ++i) {
|
|
1298 |
if (d->currentSelection.at(i).parent() == parent &&
|
|
1299 |
column >= d->currentSelection.at(i).left() &&
|
|
1300 |
column <= d->currentSelection.at(i).right())
|
|
1301 |
return false;
|
|
1302 |
}
|
|
1303 |
}
|
|
1304 |
// return false if ranges in both currentSelection and the selection model
|
|
1305 |
// intersect and have the same column contained
|
|
1306 |
if (d->currentCommand & Toggle && d->currentSelection.count()) {
|
|
1307 |
for (int i = 0; i < d->currentSelection.count(); ++i) {
|
|
1308 |
if (d->currentSelection.at(i).left() <= column &&
|
|
1309 |
d->currentSelection.at(i).right() >= column) {
|
|
1310 |
for (int j = 0; j < d->ranges.count(); ++j) {
|
|
1311 |
if (d->ranges.at(j).left() <= column && d->ranges.at(j).right() >= column
|
|
1312 |
&& d->currentSelection.at(i).intersected(d->ranges.at(j)).isValid()) {
|
|
1313 |
return false;
|
|
1314 |
}
|
|
1315 |
}
|
|
1316 |
}
|
|
1317 |
}
|
|
1318 |
}
|
|
1319 |
// add ranges and currentSelection and check through them all
|
|
1320 |
QList<QItemSelectionRange>::const_iterator it;
|
|
1321 |
QList<QItemSelectionRange> joined = d->ranges;
|
|
1322 |
if (d->currentSelection.count())
|
|
1323 |
joined += d->currentSelection;
|
|
1324 |
int rowCount = d->model->rowCount(parent);
|
|
1325 |
for (int row = 0; row < rowCount; ++row) {
|
|
1326 |
for (it = joined.constBegin(); it != joined.constEnd(); ++it) {
|
|
1327 |
if ((*it).contains(row, column, parent)) {
|
|
1328 |
Qt::ItemFlags flags = d->model->index(row, column, parent).flags();
|
|
1329 |
if ((flags & Qt::ItemIsSelectable) && (flags & Qt::ItemIsEnabled)) {
|
|
1330 |
row = qMax(row, (*it).bottom());
|
|
1331 |
break;
|
|
1332 |
}
|
|
1333 |
}
|
|
1334 |
}
|
|
1335 |
if (it == joined.constEnd())
|
|
1336 |
return false;
|
|
1337 |
}
|
|
1338 |
return rowCount > 0; // no rows means no selected items
|
|
1339 |
}
|
|
1340 |
|
|
1341 |
/*!
|
|
1342 |
Returns true if there are any items selected in the \a row with the given
|
|
1343 |
\a parent.
|
|
1344 |
*/
|
|
1345 |
bool QItemSelectionModel::rowIntersectsSelection(int row, const QModelIndex &parent) const
|
|
1346 |
{
|
|
1347 |
Q_D(const QItemSelectionModel);
|
|
1348 |
if (parent.isValid() && d->model != parent.model())
|
|
1349 |
return false;
|
|
1350 |
|
|
1351 |
QItemSelection sel = d->ranges;
|
|
1352 |
sel.merge(d->currentSelection, d->currentCommand);
|
|
1353 |
for (int i = 0; i < sel.count(); ++i) {
|
|
1354 |
int top = sel.at(i).top();
|
|
1355 |
int bottom = sel.at(i).bottom();
|
|
1356 |
int left = sel.at(i).left();
|
|
1357 |
int right = sel.at(i).right();
|
|
1358 |
if (top <= row && bottom >= row) {
|
|
1359 |
for (int j = left; j <= right; j++) {
|
|
1360 |
const Qt::ItemFlags flags = d->model->index(row, j, parent).flags();
|
|
1361 |
if ((flags & Qt::ItemIsSelectable) && (flags & Qt::ItemIsEnabled))
|
|
1362 |
return true;
|
|
1363 |
}
|
|
1364 |
}
|
|
1365 |
}
|
|
1366 |
|
|
1367 |
return false;
|
|
1368 |
}
|
|
1369 |
|
|
1370 |
/*!
|
|
1371 |
Returns true if there are any items selected in the \a column with the given
|
|
1372 |
\a parent.
|
|
1373 |
*/
|
|
1374 |
bool QItemSelectionModel::columnIntersectsSelection(int column, const QModelIndex &parent) const
|
|
1375 |
{
|
|
1376 |
Q_D(const QItemSelectionModel);
|
|
1377 |
if (parent.isValid() && d->model != parent.model())
|
|
1378 |
return false;
|
|
1379 |
|
|
1380 |
QItemSelection sel = d->ranges;
|
|
1381 |
sel.merge(d->currentSelection, d->currentCommand);
|
|
1382 |
for (int i = 0; i < sel.count(); ++i) {
|
|
1383 |
int left = sel.at(i).left();
|
|
1384 |
int right = sel.at(i).right();
|
|
1385 |
int top = sel.at(i).top();
|
|
1386 |
int bottom = sel.at(i).bottom();
|
|
1387 |
if (left <= column && right >= column) {
|
|
1388 |
for (int j = top; j <= bottom; j++) {
|
|
1389 |
const Qt::ItemFlags flags = d->model->index(j, column, parent).flags();
|
|
1390 |
if ((flags & Qt::ItemIsSelectable) && (flags & Qt::ItemIsEnabled))
|
|
1391 |
return true;
|
|
1392 |
}
|
|
1393 |
}
|
|
1394 |
}
|
|
1395 |
|
|
1396 |
return false;
|
|
1397 |
}
|
|
1398 |
|
|
1399 |
/*!
|
|
1400 |
\since 4.2
|
|
1401 |
|
|
1402 |
Returns true if the selection model contains any selection ranges;
|
|
1403 |
otherwise returns false.
|
|
1404 |
*/
|
|
1405 |
bool QItemSelectionModel::hasSelection() const
|
|
1406 |
{
|
|
1407 |
Q_D(const QItemSelectionModel);
|
|
1408 |
if (d->currentCommand & (Toggle | Deselect)) {
|
|
1409 |
QItemSelection sel = d->ranges;
|
|
1410 |
sel.merge(d->currentSelection, d->currentCommand);
|
|
1411 |
return !sel.isEmpty();
|
|
1412 |
} else {
|
|
1413 |
return !(d->ranges.isEmpty() && d->currentSelection.isEmpty());
|
|
1414 |
}
|
|
1415 |
}
|
|
1416 |
|
|
1417 |
/*!
|
|
1418 |
Returns a list of all selected model item indexes. The list contains no
|
|
1419 |
duplicates, and is not sorted.
|
|
1420 |
*/
|
|
1421 |
QModelIndexList QItemSelectionModel::selectedIndexes() const
|
|
1422 |
{
|
|
1423 |
Q_D(const QItemSelectionModel);
|
|
1424 |
QItemSelection selected = d->ranges;
|
|
1425 |
selected.merge(d->currentSelection, d->currentCommand);
|
|
1426 |
return selected.indexes();
|
|
1427 |
}
|
|
1428 |
|
|
1429 |
/*!
|
|
1430 |
\since 4.2
|
|
1431 |
Returns the indexes in the given \a column for the rows where all columns are selected.
|
|
1432 |
|
|
1433 |
\sa selectedIndexes(), selectedColumns()
|
|
1434 |
*/
|
|
1435 |
|
|
1436 |
QModelIndexList QItemSelectionModel::selectedRows(int column) const
|
|
1437 |
{
|
|
1438 |
QModelIndexList indexes;
|
|
1439 |
//the QSet contains pairs of parent modelIndex
|
|
1440 |
//and row number
|
|
1441 |
QSet< QPair<QModelIndex, int> > rowsSeen;
|
|
1442 |
|
|
1443 |
const QItemSelection ranges = selection();
|
|
1444 |
for (int i = 0; i < ranges.count(); ++i) {
|
|
1445 |
const QItemSelectionRange &range = ranges.at(i);
|
|
1446 |
QModelIndex parent = range.parent();
|
|
1447 |
for (int row = range.top(); row <= range.bottom(); row++) {
|
|
1448 |
QPair<QModelIndex, int> rowDef = qMakePair(parent, row);
|
|
1449 |
if (!rowsSeen.contains(rowDef)) {
|
|
1450 |
rowsSeen << rowDef;
|
|
1451 |
if (isRowSelected(row, parent)) {
|
|
1452 |
indexes.append(model()->index(row, column, parent));
|
|
1453 |
}
|
|
1454 |
}
|
|
1455 |
}
|
|
1456 |
}
|
|
1457 |
|
|
1458 |
return indexes;
|
|
1459 |
}
|
|
1460 |
|
|
1461 |
/*!
|
|
1462 |
\since 4.2
|
|
1463 |
Returns the indexes in the given \a row for columns where all rows are selected.
|
|
1464 |
|
|
1465 |
\sa selectedIndexes(), selectedRows()
|
|
1466 |
*/
|
|
1467 |
|
|
1468 |
QModelIndexList QItemSelectionModel::selectedColumns(int row) const
|
|
1469 |
{
|
|
1470 |
QModelIndexList indexes;
|
|
1471 |
//the QSet contains pairs of parent modelIndex
|
|
1472 |
//and column number
|
|
1473 |
QSet< QPair<QModelIndex, int> > columnsSeen;
|
|
1474 |
|
|
1475 |
const QItemSelection ranges = selection();
|
|
1476 |
for (int i = 0; i < ranges.count(); ++i) {
|
|
1477 |
const QItemSelectionRange &range = ranges.at(i);
|
|
1478 |
QModelIndex parent = range.parent();
|
|
1479 |
for (int column = range.left(); column <= range.right(); column++) {
|
|
1480 |
QPair<QModelIndex, int> columnDef = qMakePair(parent, column);
|
|
1481 |
if (!columnsSeen.contains(columnDef)) {
|
|
1482 |
columnsSeen << columnDef;
|
|
1483 |
if (isColumnSelected(column, parent)) {
|
|
1484 |
indexes.append(model()->index(row, column, parent));
|
|
1485 |
}
|
|
1486 |
}
|
|
1487 |
}
|
|
1488 |
}
|
|
1489 |
|
|
1490 |
return indexes;
|
|
1491 |
}
|
|
1492 |
|
|
1493 |
/*!
|
|
1494 |
Returns the selection ranges stored in the selection model.
|
|
1495 |
*/
|
|
1496 |
const QItemSelection QItemSelectionModel::selection() const
|
|
1497 |
{
|
|
1498 |
Q_D(const QItemSelectionModel);
|
|
1499 |
QItemSelection selected = d->ranges;
|
|
1500 |
selected.merge(d->currentSelection, d->currentCommand);
|
|
1501 |
int i = 0;
|
|
1502 |
// make sure we have no invalid ranges
|
|
1503 |
// ### should probably be handled more generic somewhere else
|
|
1504 |
while (i<selected.count()) {
|
|
1505 |
if (selected.at(i).isValid())
|
|
1506 |
++i;
|
|
1507 |
else
|
|
1508 |
(selected.removeAt(i));
|
|
1509 |
}
|
|
1510 |
return selected;
|
|
1511 |
}
|
|
1512 |
|
|
1513 |
/*!
|
|
1514 |
Returns the item model operated on by the selection model.
|
|
1515 |
*/
|
|
1516 |
const QAbstractItemModel *QItemSelectionModel::model() const
|
|
1517 |
{
|
|
1518 |
return d_func()->model;
|
|
1519 |
}
|
|
1520 |
|
|
1521 |
/*!
|
|
1522 |
Compares the two selections \a newSelection and \a oldSelection
|
|
1523 |
and emits selectionChanged() with the deselected and selected items.
|
|
1524 |
*/
|
|
1525 |
void QItemSelectionModel::emitSelectionChanged(const QItemSelection &newSelection,
|
|
1526 |
const QItemSelection &oldSelection)
|
|
1527 |
{
|
|
1528 |
// if both selections are empty or equal we return
|
|
1529 |
if ((oldSelection.isEmpty() && newSelection.isEmpty()) ||
|
|
1530 |
oldSelection == newSelection)
|
|
1531 |
return;
|
|
1532 |
|
|
1533 |
// if either selection is empty we do not need to compare
|
|
1534 |
if (oldSelection.isEmpty() || newSelection.isEmpty()) {
|
|
1535 |
emit selectionChanged(newSelection, oldSelection);
|
|
1536 |
return;
|
|
1537 |
}
|
|
1538 |
|
|
1539 |
QItemSelection deselected = oldSelection;
|
|
1540 |
QItemSelection selected = newSelection;
|
|
1541 |
|
|
1542 |
// remove equal ranges
|
|
1543 |
bool advance;
|
|
1544 |
for (int o = 0; o < deselected.count(); ++o) {
|
|
1545 |
advance = true;
|
|
1546 |
for (int s = 0; s < selected.count() && o < deselected.count();) {
|
|
1547 |
if (deselected.at(o) == selected.at(s)) {
|
|
1548 |
deselected.removeAt(o);
|
|
1549 |
selected.removeAt(s);
|
|
1550 |
advance = false;
|
|
1551 |
} else {
|
|
1552 |
++s;
|
|
1553 |
}
|
|
1554 |
}
|
|
1555 |
if (advance)
|
|
1556 |
++o;
|
|
1557 |
}
|
|
1558 |
|
|
1559 |
// find intersections
|
|
1560 |
QItemSelection intersections;
|
|
1561 |
for (int o = 0; o < deselected.count(); ++o) {
|
|
1562 |
for (int s = 0; s < selected.count(); ++s) {
|
|
1563 |
if (deselected.at(o).intersects(selected.at(s)))
|
|
1564 |
intersections.append(deselected.at(o).intersected(selected.at(s)));
|
|
1565 |
}
|
|
1566 |
}
|
|
1567 |
|
|
1568 |
// compare remaining ranges with intersections and split them to find deselected and selected
|
|
1569 |
for (int i = 0; i < intersections.count(); ++i) {
|
|
1570 |
// split deselected
|
|
1571 |
for (int o = 0; o < deselected.count();) {
|
|
1572 |
if (deselected.at(o).intersects(intersections.at(i))) {
|
|
1573 |
QItemSelection::split(deselected.at(o), intersections.at(i), &deselected);
|
|
1574 |
deselected.removeAt(o);
|
|
1575 |
} else {
|
|
1576 |
++o;
|
|
1577 |
}
|
|
1578 |
}
|
|
1579 |
// split selected
|
|
1580 |
for (int s = 0; s < selected.count();) {
|
|
1581 |
if (selected.at(s).intersects(intersections.at(i))) {
|
|
1582 |
QItemSelection::split(selected.at(s), intersections.at(i), &selected);
|
|
1583 |
selected.removeAt(s);
|
|
1584 |
} else {
|
|
1585 |
++s;
|
|
1586 |
}
|
|
1587 |
}
|
|
1588 |
}
|
|
1589 |
|
|
1590 |
emit selectionChanged(selected, deselected);
|
|
1591 |
}
|
|
1592 |
|
|
1593 |
#ifndef QT_NO_DEBUG_STREAM
|
|
1594 |
QDebug operator<<(QDebug dbg, const QItemSelectionRange &range)
|
|
1595 |
{
|
|
1596 |
#ifndef Q_BROKEN_DEBUG_STREAM
|
|
1597 |
dbg.nospace() << "QItemSelectionRange(" << range.topLeft()
|
|
1598 |
<< ',' << range.bottomRight() << ')';
|
|
1599 |
return dbg.space();
|
|
1600 |
#else
|
|
1601 |
qWarning("This compiler doesn't support streaming QItemSelectionRange to QDebug");
|
|
1602 |
return dbg;
|
|
1603 |
Q_UNUSED(range);
|
|
1604 |
#endif
|
|
1605 |
}
|
|
1606 |
#endif
|
|
1607 |
|
|
1608 |
QT_END_NAMESPACE
|
|
1609 |
|
|
1610 |
#include "moc_qitemselectionmodel.cpp"
|
|
1611 |
|
|
1612 |
#endif // QT_NO_ITEMVIEWS
|