8c04aab896
Cleanup the Widget examples - use the new signal/slot syntax where possible - layout, statemachine, tools and touch subdirectory Change-Id: I466b309b643ef7ffc27be7591fa10f4c75cfd3f8 Reviewed-by: Luca Beldi <v.ronin@yahoo.it> Reviewed-by: Sze Howe Koh <szehowe.koh@gmail.com> Reviewed-by: Paul Wicking <paul.wicking@qt.io>
217 lines
6.6 KiB
C++
217 lines
6.6 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2016 The Qt Company Ltd.
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** Contact: https://www.qt.io/licensing/
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**
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** This file is part of the examples of the Qt Toolkit.
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**
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** $QT_BEGIN_LICENSE:BSD$
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** Commercial License Usage
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** Licensees holding valid commercial Qt licenses may use this file in
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** accordance with the commercial license agreement provided with the
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** Software or, alternatively, in accordance with the terms contained in
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** a written agreement between you and The Qt Company. For licensing terms
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** and conditions see https://www.qt.io/terms-conditions. For further
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** information use the contact form at https://www.qt.io/contact-us.
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**
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** BSD License Usage
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** Alternatively, you may use this file under the terms of the BSD license
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** as follows:
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**
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** "Redistribution and use in source and binary forms, with or without
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** modification, are permitted provided that the following conditions are
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** met:
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** * Redistributions of source code must retain the above copyright
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** notice, this list of conditions and the following disclaimer.
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** * Redistributions in binary form must reproduce the above copyright
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** notice, this list of conditions and the following disclaimer in
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** the documentation and/or other materials provided with the
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** distribution.
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** * Neither the name of The Qt Company Ltd nor the names of its
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** contributors may be used to endorse or promote products derived
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** from this software without specific prior written permission.
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**
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**
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** THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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** "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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** LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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** OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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** SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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** LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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** OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE."
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**
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** $QT_END_LICENSE$
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**
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****************************************************************************/
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#include <QtWidgets>
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#include "mainwindow.h"
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#include "diagramscene.h"
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#include "diagramitem.h"
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#include "commands.h"
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//! [0]
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MainWindow::MainWindow()
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{
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undoStack = new QUndoStack(this);
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createActions();
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createMenus();
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createUndoView();
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diagramScene = new DiagramScene();
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QBrush pixmapBrush(QPixmap(":/images/cross.png").scaled(30, 30));
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diagramScene->setBackgroundBrush(pixmapBrush);
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diagramScene->setSceneRect(QRect(0, 0, 500, 500));
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connect(diagramScene, &DiagramScene::itemMoved,
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this, &MainWindow::itemMoved);
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setWindowTitle("Undo Framework");
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QGraphicsView *view = new QGraphicsView(diagramScene);
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setCentralWidget(view);
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resize(700, 500);
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}
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//! [0]
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//! [1]
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void MainWindow::createUndoView()
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{
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undoView = new QUndoView(undoStack);
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undoView->setWindowTitle(tr("Command List"));
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undoView->show();
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undoView->setAttribute(Qt::WA_QuitOnClose, false);
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}
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//! [1]
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//! [2]
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void MainWindow::createActions()
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{
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deleteAction = new QAction(tr("&Delete Item"), this);
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deleteAction->setShortcut(tr("Del"));
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connect(deleteAction, &QAction::triggered, this, &MainWindow::deleteItem);
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//! [2] //! [3]
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//! [3] //! [4]
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addBoxAction = new QAction(tr("Add &Box"), this);
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//! [4]
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addBoxAction->setShortcut(tr("Ctrl+O"));
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connect(addBoxAction, &QAction::triggered, this, &MainWindow::addBox);
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addTriangleAction = new QAction(tr("Add &Triangle"), this);
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addTriangleAction->setShortcut(tr("Ctrl+T"));
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connect(addTriangleAction, &QAction::triggered, this, &MainWindow::addTriangle);
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//! [5]
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undoAction = undoStack->createUndoAction(this, tr("&Undo"));
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undoAction->setShortcuts(QKeySequence::Undo);
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redoAction = undoStack->createRedoAction(this, tr("&Redo"));
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redoAction->setShortcuts(QKeySequence::Redo);
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//! [5]
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exitAction = new QAction(tr("E&xit"), this);
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exitAction->setShortcuts(QKeySequence::Quit);
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connect(exitAction, &QAction::triggered, this, &QWidget::close);
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aboutAction = new QAction(tr("&About"), this);
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QList<QKeySequence> aboutShortcuts;
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aboutShortcuts << tr("Ctrl+A") << tr("Ctrl+B");
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aboutAction->setShortcuts(aboutShortcuts);
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connect(aboutAction, &QAction::triggered, this, &MainWindow::about);
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}
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//! [6]
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void MainWindow::createMenus()
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{
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//! [6]
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fileMenu = menuBar()->addMenu(tr("&File"));
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fileMenu->addAction(exitAction);
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//! [7]
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editMenu = menuBar()->addMenu(tr("&Edit"));
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editMenu->addAction(undoAction);
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editMenu->addAction(redoAction);
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editMenu->addSeparator();
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editMenu->addAction(deleteAction);
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connect(editMenu, &QMenu::aboutToShow,
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this, &MainWindow::itemMenuAboutToShow);
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connect(editMenu, &QMenu::aboutToHide,
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this, &MainWindow::itemMenuAboutToHide);
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//! [7]
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itemMenu = menuBar()->addMenu(tr("&Item"));
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itemMenu->addAction(addBoxAction);
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itemMenu->addAction(addTriangleAction);
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helpMenu = menuBar()->addMenu(tr("&About"));
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helpMenu->addAction(aboutAction);
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//! [8]
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}
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//! [8]
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//! [9]
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void MainWindow::itemMoved(DiagramItem *movedItem,
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const QPointF &oldPosition)
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{
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undoStack->push(new MoveCommand(movedItem, oldPosition));
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}
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//! [9]
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//! [10]
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void MainWindow::deleteItem()
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{
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if (diagramScene->selectedItems().isEmpty())
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return;
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QUndoCommand *deleteCommand = new DeleteCommand(diagramScene);
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undoStack->push(deleteCommand);
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}
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//! [10]
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//! [11]
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void MainWindow::itemMenuAboutToHide()
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{
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deleteAction->setEnabled(true);
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}
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//! [11]
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//! [12]
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void MainWindow::itemMenuAboutToShow()
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{
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deleteAction->setEnabled(!diagramScene->selectedItems().isEmpty());
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}
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//! [12]
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//! [13]
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void MainWindow::addBox()
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{
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QUndoCommand *addCommand = new AddCommand(DiagramItem::Box, diagramScene);
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undoStack->push(addCommand);
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}
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//! [13]
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//! [14]
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void MainWindow::addTriangle()
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{
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QUndoCommand *addCommand = new AddCommand(DiagramItem::Triangle,
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diagramScene);
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undoStack->push(addCommand);
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}
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//! [14]
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//! [15]
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void MainWindow::about()
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{
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QMessageBox::about(this, tr("About Undo"),
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tr("The <b>Undo</b> example demonstrates how to "
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"use Qt's undo framework."));
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}
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//! [15]
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