author | Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com> |
Fri, 19 Feb 2010 23:40:16 +0200 | |
branch | RCL_3 |
changeset 4 | 3b1da2848fc7 |
parent 0 | 1918ee327afb |
permissions | -rw-r--r-- |
0 | 1 |
/**************************************************************************** |
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** |
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3b1da2848fc7
Revision: 201003
Dremov Kirill (Nokia-D-MSW/Tampere) <kirill.dremov@nokia.com>
parents:
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diff
changeset
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** Copyright (C) 2010 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 "qundostack.h" |
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#include "qundoview.h" |
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#ifndef QT_NO_UNDOVIEW |
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#include "qundogroup.h" |
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#include <QtCore/qabstractitemmodel.h> |
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#include <QtCore/qpointer.h> |
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#include <QtGui/qicon.h> |
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#include <private/qlistview_p.h> |
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QT_BEGIN_NAMESPACE |
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class QUndoModel : public QAbstractItemModel |
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{ |
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Q_OBJECT |
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public: |
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QUndoModel(QObject *parent = 0); |
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QUndoStack *stack() const; |
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virtual QModelIndex index(int row, int column, |
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const QModelIndex &parent = QModelIndex()) const; |
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virtual QModelIndex parent(const QModelIndex &child) const; |
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virtual int rowCount(const QModelIndex &parent = QModelIndex()) const; |
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virtual int columnCount(const QModelIndex &parent = QModelIndex()) const; |
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virtual QVariant data(const QModelIndex &index, int role = Qt::DisplayRole) const; |
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QModelIndex selectedIndex() const; |
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QItemSelectionModel *selectionModel() const; |
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QString emptyLabel() const; |
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void setEmptyLabel(const QString &label); |
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void setCleanIcon(const QIcon &icon); |
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QIcon cleanIcon() const; |
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public slots: |
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void setStack(QUndoStack *stack); |
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private slots: |
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void stackChanged(); |
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void stackDestroyed(QObject *obj); |
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void setStackCurrentIndex(const QModelIndex &index); |
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private: |
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QUndoStack *m_stack; |
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QItemSelectionModel *m_sel_model; |
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QString m_emty_label; |
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QIcon m_clean_icon; |
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}; |
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QUndoModel::QUndoModel(QObject *parent) |
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: QAbstractItemModel(parent) |
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{ |
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m_stack = 0; |
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m_sel_model = new QItemSelectionModel(this, this); |
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connect(m_sel_model, SIGNAL(currentChanged(QModelIndex,QModelIndex)), |
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this, SLOT(setStackCurrentIndex(QModelIndex))); |
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m_emty_label = tr("<empty>"); |
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} |
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QItemSelectionModel *QUndoModel::selectionModel() const |
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{ |
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return m_sel_model; |
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} |
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QUndoStack *QUndoModel::stack() const |
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{ |
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return m_stack; |
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} |
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void QUndoModel::setStack(QUndoStack *stack) |
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{ |
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if (m_stack == stack) |
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return; |
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if (m_stack != 0) { |
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disconnect(m_stack, SIGNAL(cleanChanged(bool)), this, SLOT(stackChanged())); |
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disconnect(m_stack, SIGNAL(indexChanged(int)), this, SLOT(stackChanged())); |
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disconnect(m_stack, SIGNAL(destroyed(QObject*)), this, SLOT(stackDestroyed(QObject*))); |
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} |
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m_stack = stack; |
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if (m_stack != 0) { |
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connect(m_stack, SIGNAL(cleanChanged(bool)), this, SLOT(stackChanged())); |
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connect(m_stack, SIGNAL(indexChanged(int)), this, SLOT(stackChanged())); |
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connect(m_stack, SIGNAL(destroyed(QObject*)), this, SLOT(stackDestroyed(QObject*))); |
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} |
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stackChanged(); |
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} |
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void QUndoModel::stackDestroyed(QObject *obj) |
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{ |
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if (obj != m_stack) |
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return; |
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m_stack = 0; |
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stackChanged(); |
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} |
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void QUndoModel::stackChanged() |
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{ |
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reset(); |
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m_sel_model->setCurrentIndex(selectedIndex(), QItemSelectionModel::ClearAndSelect); |
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} |
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void QUndoModel::setStackCurrentIndex(const QModelIndex &index) |
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{ |
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if (m_stack == 0) |
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return; |
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if (index == selectedIndex()) |
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return; |
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if (index.column() != 0) |
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return; |
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m_stack->setIndex(index.row()); |
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} |
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QModelIndex QUndoModel::selectedIndex() const |
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{ |
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return m_stack == 0 ? QModelIndex() : createIndex(m_stack->index(), 0); |
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} |
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QModelIndex QUndoModel::index(int row, int column, const QModelIndex &parent) const |
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{ |
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if (m_stack == 0) |
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return QModelIndex(); |
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if (parent.isValid()) |
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return QModelIndex(); |
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if (column != 0) |
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return QModelIndex(); |
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if (row < 0 || row > m_stack->count()) |
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return QModelIndex(); |
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return createIndex(row, column); |
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} |
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QModelIndex QUndoModel::parent(const QModelIndex&) const |
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{ |
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return QModelIndex(); |
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} |
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int QUndoModel::rowCount(const QModelIndex &parent) const |
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{ |
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if (m_stack == 0) |
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return 0; |
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if (parent.isValid()) |
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return 0; |
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return m_stack->count() + 1; |
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} |
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int QUndoModel::columnCount(const QModelIndex&) const |
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{ |
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return 1; |
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} |
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QVariant QUndoModel::data(const QModelIndex &index, int role) const |
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{ |
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if (m_stack == 0) |
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return QVariant(); |
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if (index.column() != 0) |
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return QVariant(); |
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if (index.row() < 0 || index.row() > m_stack->count()) |
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return QVariant(); |
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if (role == Qt::DisplayRole) { |
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if (index.row() == 0) |
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return m_emty_label; |
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return m_stack->text(index.row() - 1); |
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} else if (role == Qt::DecorationRole) { |
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if (index.row() == m_stack->cleanIndex() && !m_clean_icon.isNull()) |
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return m_clean_icon; |
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return QVariant(); |
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} |
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return QVariant(); |
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} |
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QString QUndoModel::emptyLabel() const |
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{ |
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return m_emty_label; |
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} |
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void QUndoModel::setEmptyLabel(const QString &label) |
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{ |
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m_emty_label = label; |
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stackChanged(); |
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} |
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void QUndoModel::setCleanIcon(const QIcon &icon) |
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{ |
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m_clean_icon = icon; |
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stackChanged(); |
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} |
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QIcon QUndoModel::cleanIcon() const |
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{ |
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return m_clean_icon; |
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} |
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/*! |
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\class QUndoView |
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\brief The QUndoView class displays the contents of a QUndoStack. |
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\since 4.2 |
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\ingroup advanced |
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QUndoView is a QListView which displays the list of commands pushed on an undo stack. |
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The most recently executed command is always selected. Selecting a different command |
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results in a call to QUndoStack::setIndex(), rolling the state of the document |
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backwards or forward to the new command. |
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The stack can be set explicitly with setStack(). Alternatively, a QUndoGroup object can |
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be set with setGroup(). The view will then update itself automatically whenever the |
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active stack of the group changes. |
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\image qundoview.png |
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*/ |
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class QUndoViewPrivate : public QListViewPrivate |
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{ |
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Q_DECLARE_PUBLIC(QUndoView) |
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public: |
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QUndoViewPrivate() : |
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#ifndef QT_NO_UNDOGROUP |
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group(0), |
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#endif |
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model(0) {} |
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#ifndef QT_NO_UNDOGROUP |
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QPointer<QUndoGroup> group; |
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#endif |
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QUndoModel *model; |
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void init(); |
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}; |
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void QUndoViewPrivate::init() |
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{ |
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Q_Q(QUndoView); |
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model = new QUndoModel(q); |
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q->setModel(model); |
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q->setSelectionModel(model->selectionModel()); |
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} |
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/*! |
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Constructs a new view with parent \a parent. |
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*/ |
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QUndoView::QUndoView(QWidget *parent) |
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: QListView(*new QUndoViewPrivate(), parent) |
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{ |
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Q_D(QUndoView); |
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d->init(); |
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} |
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/*! |
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Constructs a new view with parent \a parent and sets the observed stack to \a stack. |
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*/ |
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QUndoView::QUndoView(QUndoStack *stack, QWidget *parent) |
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: QListView(*new QUndoViewPrivate(), parent) |
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{ |
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Q_D(QUndoView); |
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d->init(); |
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setStack(stack); |
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} |
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#ifndef QT_NO_UNDOGROUP |
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/*! |
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Constructs a new view with parent \a parent and sets the observed group to \a group. |
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The view will update itself autmiatically whenever the active stack of the group changes. |
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*/ |
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QUndoView::QUndoView(QUndoGroup *group, QWidget *parent) |
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: QListView(*new QUndoViewPrivate(), parent) |
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{ |
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Q_D(QUndoView); |
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d->init(); |
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setGroup(group); |
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} |
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#endif // QT_NO_UNDOGROUP |
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/*! |
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Destroys this view. |
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*/ |
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QUndoView::~QUndoView() |
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{ |
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} |
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/*! |
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Returns the stack currently displayed by this view. If the view is looking at a |
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QUndoGroup, this the group's active stack. |
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\sa setStack() setGroup() |
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*/ |
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QUndoStack *QUndoView::stack() const |
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{ |
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Q_D(const QUndoView); |
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return d->model->stack(); |
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} |
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/*! |
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Sets the stack displayed by this view to \a stack. If \a stack is 0, the view |
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will be empty. |
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If the view was previously looking at a QUndoGroup, the group is set to 0. |
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\sa stack() setGroup() |
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*/ |
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void QUndoView::setStack(QUndoStack *stack) |
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{ |
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Q_D(QUndoView); |
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#ifndef QT_NO_UNDOGROUP |
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setGroup(0); |
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#endif |
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d->model->setStack(stack); |
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} |
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#ifndef QT_NO_UNDOGROUP |
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/*! |
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Sets the group displayed by this view to \a group. If \a group is 0, the view will |
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be empty. |
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The view will update itself autmiatically whenever the active stack of the group changes. |
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\sa group() setStack() |
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*/ |
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void QUndoView::setGroup(QUndoGroup *group) |
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{ |
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Q_D(QUndoView); |
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if (d->group == group) |
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return; |
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if (d->group != 0) { |
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disconnect(d->group, SIGNAL(activeStackChanged(QUndoStack*)), |
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d->model, SLOT(setStack(QUndoStack*))); |
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} |
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400 |
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d->group = group; |
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402 |
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if (d->group != 0) { |
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connect(d->group, SIGNAL(activeStackChanged(QUndoStack*)), |
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d->model, SLOT(setStack(QUndoStack*))); |
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d->model->setStack(d->group->activeStack()); |
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} else { |
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d->model->setStack(0); |
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} |
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} |
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412 |
/*! |
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Returns the group displayed by this view. |
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If the view is not looking at group, this function returns 0. |
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\sa setGroup() setStack() |
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*/ |
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QUndoGroup *QUndoView::group() const |
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{ |
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Q_D(const QUndoView); |
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return d->group; |
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} |
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#endif // QT_NO_UNDOGROUP |
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428 |
/*! |
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\property QUndoView::emptyLabel |
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\brief the label used for the empty state. |
|
431 |
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432 |
The empty label is the topmost element in the list of commands, which represents |
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the state of the document before any commands were pushed on the stack. The default |
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is the string "<empty>". |
|
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*/ |
|
436 |
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437 |
void QUndoView::setEmptyLabel(const QString &label) |
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{ |
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Q_D(QUndoView); |
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d->model->setEmptyLabel(label); |
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} |
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442 |
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443 |
QString QUndoView::emptyLabel() const |
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{ |
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Q_D(const QUndoView); |
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return d->model->emptyLabel(); |
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} |
|
448 |
||
449 |
/*! |
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450 |
\property QUndoView::cleanIcon |
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\brief the icon used to represent the clean state. |
|
452 |
||
453 |
A stack may have a clean state set with QUndoStack::setClean(). This is usually |
|
454 |
the state of the document at the point it was saved. QUndoView can display an |
|
455 |
icon in the list of commands to show the clean state. If this property is |
|
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a null icon, no icon is shown. The default value is the null icon. |
|
457 |
*/ |
|
458 |
||
459 |
void QUndoView::setCleanIcon(const QIcon &icon) |
|
460 |
{ |
|
461 |
Q_D(const QUndoView); |
|
462 |
d->model->setCleanIcon(icon); |
|
463 |
||
464 |
} |
|
465 |
||
466 |
QIcon QUndoView::cleanIcon() const |
|
467 |
{ |
|
468 |
Q_D(const QUndoView); |
|
469 |
return d->model->cleanIcon(); |
|
470 |
} |
|
471 |
||
472 |
QT_END_NAMESPACE |
|
473 |
||
474 |
#include "qundoview.moc" |
|
475 |
||
476 |
#endif // QT_NO_UNDOVIEW |