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Diffstat (limited to 'examples/widgets/tools/undoframework/mainwindow.cpp')
| -rw-r--r-- | examples/widgets/tools/undoframework/mainwindow.cpp | 206 |
1 files changed, 206 insertions, 0 deletions
diff --git a/examples/widgets/tools/undoframework/mainwindow.cpp b/examples/widgets/tools/undoframework/mainwindow.cpp new file mode 100644 index 0000000000..6ac3818113 --- /dev/null +++ b/examples/widgets/tools/undoframework/mainwindow.cpp @@ -0,0 +1,206 @@ +/**************************************************************************** +** +** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies). +** Contact: http://www.qt-project.org/legal +** +** This file is part of the examples of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:BSD$ +** You may use this file under the terms of the BSD license as follows: +** +** "Redistribution and use in source and binary forms, with or without +** modification, are permitted provided that the following conditions are +** met: +** * Redistributions of source code must retain the above copyright +** notice, this list of conditions and the following disclaimer. +** * Redistributions in binary form must reproduce the above copyright +** notice, this list of conditions and the following disclaimer in +** the documentation and/or other materials provided with the +** distribution. +** * Neither the name of Digia Plc and its Subsidiary(-ies) nor the names +** of its contributors may be used to endorse or promote products derived +** from this software without specific prior written permission. +** +** +** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS +** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT +** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR +** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT +** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, +** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT +** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, +** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY +** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT +** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE +** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE." +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include <QtWidgets> + +#include "mainwindow.h" +#include "diagramscene.h" +#include "diagramitem.h" +#include "commands.h" + +//! [0] +MainWindow::MainWindow() +{ + undoStack = new QUndoStack(this); + + createActions(); + createMenus(); + + createUndoView(); + + diagramScene = new DiagramScene(); + QBrush pixmapBrush(QPixmap(":/images/cross.png").scaled(30, 30)); + diagramScene->setBackgroundBrush(pixmapBrush); + diagramScene->setSceneRect(QRect(0, 0, 500, 500)); + + connect(diagramScene, SIGNAL(itemMoved(DiagramItem*,QPointF)), + this, SLOT(itemMoved(DiagramItem*,QPointF))); + + setWindowTitle("Undo Framework"); + QGraphicsView *view = new QGraphicsView(diagramScene); + setCentralWidget(view); + resize(700, 500); +} +//! [0] + +//! [1] +void MainWindow::createUndoView() +{ + undoView = new QUndoView(undoStack); + undoView->setWindowTitle(tr("Command List")); + undoView->show(); + undoView->setAttribute(Qt::WA_QuitOnClose, false); +} +//! [1] + +//! [2] +void MainWindow::createActions() +{ + deleteAction = new QAction(tr("&Delete Item"), this); + deleteAction->setShortcut(tr("Del")); + connect(deleteAction, SIGNAL(triggered()), this, SLOT(deleteItem())); +//! [2] //! [3] + +//! [3] //! [4] + addBoxAction = new QAction(tr("Add &Box"), this); +//! [4] + addBoxAction->setShortcut(tr("Ctrl+O")); + connect(addBoxAction, SIGNAL(triggered()), this, SLOT(addBox())); + + addTriangleAction = new QAction(tr("Add &Triangle"), this); + addTriangleAction->setShortcut(tr("Ctrl+T")); + connect(addTriangleAction, SIGNAL(triggered()), this, SLOT(addTriangle())); + +//! [5] + undoAction = undoStack->createUndoAction(this, tr("&Undo")); + undoAction->setShortcuts(QKeySequence::Undo); + + redoAction = undoStack->createRedoAction(this, tr("&Redo")); + redoAction->setShortcuts(QKeySequence::Redo); +//! [5] + + exitAction = new QAction(tr("E&xit"), this); + exitAction->setShortcuts(QKeySequence::Quit); + connect(exitAction, SIGNAL(triggered()), this, SLOT(close())); + + aboutAction = new QAction(tr("&About"), this); + QList<QKeySequence> aboutShortcuts; + aboutShortcuts << tr("Ctrl+A") << tr("Ctrl+B"); + aboutAction->setShortcuts(aboutShortcuts); + connect(aboutAction, SIGNAL(triggered()), this, SLOT(about())); +} + +//! [6] +void MainWindow::createMenus() +{ +//! [6] + fileMenu = menuBar()->addMenu(tr("&File")); + fileMenu->addAction(exitAction); + +//! [7] + editMenu = menuBar()->addMenu(tr("&Edit")); + editMenu->addAction(undoAction); + editMenu->addAction(redoAction); + editMenu->addSeparator(); + editMenu->addAction(deleteAction); + connect(editMenu, SIGNAL(aboutToShow()), + this, SLOT(itemMenuAboutToShow())); + connect(editMenu, SIGNAL(aboutToHide()), + this, SLOT(itemMenuAboutToHide())); + +//! [7] + itemMenu = menuBar()->addMenu(tr("&Item")); + itemMenu->addAction(addBoxAction); + itemMenu->addAction(addTriangleAction); + + helpMenu = menuBar()->addMenu(tr("&About")); + helpMenu->addAction(aboutAction); +//! [8] +} +//! [8] + +//! [9] +void MainWindow::itemMoved(DiagramItem *movedItem, + const QPointF &oldPosition) +{ + undoStack->push(new MoveCommand(movedItem, oldPosition)); +} +//! [9] + +//! [10] +void MainWindow::deleteItem() +{ + if (diagramScene->selectedItems().isEmpty()) + return; + + QUndoCommand *deleteCommand = new DeleteCommand(diagramScene); + undoStack->push(deleteCommand); +} +//! [10] + +//! [11] +void MainWindow::itemMenuAboutToHide() +{ + deleteAction->setEnabled(true); +} +//! [11] + +//! [12] +void MainWindow::itemMenuAboutToShow() +{ + deleteAction->setEnabled(!diagramScene->selectedItems().isEmpty()); +} +//! [12] + +//! [13] +void MainWindow::addBox() +{ + QUndoCommand *addCommand = new AddCommand(DiagramItem::Box, diagramScene); + undoStack->push(addCommand); +} +//! [13] + +//! [14] +void MainWindow::addTriangle() +{ + QUndoCommand *addCommand = new AddCommand(DiagramItem::Triangle, + diagramScene); + undoStack->push(addCommand); +} +//! [14] + +//! [15] +void MainWindow::about() +{ + QMessageBox::about(this, tr("About Undo"), + tr("The <b>Undo</b> example demonstrates how to " + "use Qt's undo framework.")); +} +//! [15] |