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// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
#include "mainwindow.h"
#include "diagramscene.h"
#include "diagramitem.h"
#include "commands.h"
#include <QAction>
#include <QDockWidget>
#include <QGraphicsView>
#include <QMenu>
#include <QMenuBar>
#include <QMessageBox>
#include <QToolBar>
#include <QUndoView>
//! [0]
MainWindow::MainWindow()
{
undoStack = new QUndoStack(this);
diagramScene = new DiagramScene();
const QBrush pixmapBrush(QPixmap(":/icons/cross.png").scaled(30, 30));
diagramScene->setBackgroundBrush(pixmapBrush);
diagramScene->setSceneRect(QRect(0, 0, 500, 500));
createActions();
createMenus();
createToolBars();
createUndoView();
connect(diagramScene, &DiagramScene::itemMoved,
this, &MainWindow::itemMoved);
connect(diagramScene, &DiagramScene::selectionChanged,
this, &MainWindow::updateActions);
setWindowTitle("Undo Framework");
QGraphicsView *view = new QGraphicsView(diagramScene);
setCentralWidget(view);
adjustSize();
}
//! [0]
//! [1]
void MainWindow::createUndoView()
{
QDockWidget *undoDockWidget = new QDockWidget;
undoDockWidget->setWindowTitle(tr("Command List"));
undoDockWidget->setWidget(new QUndoView(undoStack));
addDockWidget(Qt::RightDockWidgetArea, undoDockWidget);
}
//! [1]
//! [2]
void MainWindow::createActions()
{
deleteAction = new QAction(QIcon(":/icons/remove.png"), tr("&Delete Item"), this);
deleteAction->setShortcut(tr("Del"));
connect(deleteAction, &QAction::triggered, this, &MainWindow::deleteItem);
//! [2]
addBoxAction = new QAction(QIcon(":/icons/rectangle.png"), tr("Add &Box"), this);
addBoxAction->setShortcut(tr("Ctrl+O"));
connect(addBoxAction, &QAction::triggered, this, &MainWindow::addBox);
addTriangleAction = new QAction(QIcon(":/icons/triangle.png"), tr("Add &Triangle"), this);
addTriangleAction->setShortcut(tr("Ctrl+T"));
connect(addTriangleAction, &QAction::triggered, this, &MainWindow::addTriangle);
//! [5]
undoAction = undoStack->createUndoAction(this, tr("&Undo"));
undoAction->setIcon(QIcon(":/icons/undo.png"));
undoAction->setShortcuts(QKeySequence::Undo);
redoAction = undoStack->createRedoAction(this, tr("&Redo"));
redoAction->setIcon(QIcon(":/icons/redo.png"));
redoAction->setShortcuts(QKeySequence::Redo);
//! [5]
exitAction = new QAction(tr("E&xit"), this);
exitAction->setShortcuts(QKeySequence::Quit);
connect(exitAction, &QAction::triggered, this, &QWidget::close);
aboutAction = new QAction(tr("&About"), this);
QList<QKeySequence> aboutShortcuts;
aboutShortcuts << tr("Ctrl+A") << tr("Ctrl+B");
aboutAction->setShortcuts(aboutShortcuts);
connect(aboutAction, &QAction::triggered, this, &MainWindow::about);
//! [6]
updateActions();
}
void MainWindow::updateActions()
{
deleteAction->setEnabled(!diagramScene->selectedItems().isEmpty());
}
//! [6]
//! [7]
void MainWindow::createMenus()
{
fileMenu = menuBar()->addMenu(tr("&File"));
fileMenu->addAction(exitAction);
editMenu = menuBar()->addMenu(tr("&Edit"));
editMenu->addAction(undoAction);
editMenu->addAction(redoAction);
editMenu->addSeparator();
editMenu->addAction(deleteAction);
//! [7]
itemMenu = menuBar()->addMenu(tr("&Item"));
itemMenu->addAction(addBoxAction);
itemMenu->addAction(addTriangleAction);
//! [8]
helpMenu = menuBar()->addMenu(tr("&About"));
helpMenu->addAction(aboutAction);
}
void MainWindow::createToolBars()
{
QToolBar *editToolBar = new QToolBar;
editToolBar->addAction(undoAction);
editToolBar->addAction(redoAction);
editToolBar->addSeparator();
editToolBar->addAction(deleteAction);
//! [8]
QToolBar *itemToolBar = new QToolBar;
itemToolBar->addAction(addBoxAction);
itemToolBar->addAction(addTriangleAction);
//! [9]
addToolBar(editToolBar);
addToolBar(itemToolBar);
}
//! [9]
//! [11]
void MainWindow::itemMoved(DiagramItem *movedItem,
const QPointF &oldPosition)
{
undoStack->push(new MoveCommand(movedItem, oldPosition));
}
//! [11]
//! [12]
void MainWindow::deleteItem()
{
if (diagramScene->selectedItems().isEmpty())
return;
QUndoCommand *deleteCommand = new DeleteCommand(diagramScene);
undoStack->push(deleteCommand);
}
//! [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]
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