be15856f61
Change copyrights and license headers from Nokia to Digia Change-Id: If1cc974286d29fd01ec6c19dd4719a67f4c3f00e Reviewed-by: Lars Knoll <lars.knoll@digia.com> Reviewed-by: Sergio Ahumada <sergio.ahumada@digia.com>
373 lines
11 KiB
C++
373 lines
11 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/legal
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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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** You may use this file under the terms of the BSD license 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 Digia Plc and its Subsidiary(-ies) nor the names
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** of its 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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MainWindow::MainWindow()
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{
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init();
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setCurrentFile("");
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}
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MainWindow::MainWindow(const QString &fileName)
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{
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init();
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loadFile(fileName);
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}
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void MainWindow::closeEvent(QCloseEvent *event)
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{
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if (maybeSave()) {
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writeSettings();
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event->accept();
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} else {
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event->ignore();
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}
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}
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void MainWindow::newFile()
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{
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MainWindow *other = new MainWindow;
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other->move(x() + 40, y() + 40);
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other->show();
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}
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void MainWindow::open()
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{
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QString fileName = QFileDialog::getOpenFileName(this);
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if (!fileName.isEmpty()) {
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MainWindow *existing = findMainWindow(fileName);
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if (existing) {
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existing->show();
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existing->raise();
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existing->activateWindow();
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return;
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}
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if (isUntitled && textEdit->document()->isEmpty()
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&& !isWindowModified()) {
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loadFile(fileName);
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} else {
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MainWindow *other = new MainWindow(fileName);
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if (other->isUntitled) {
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delete other;
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return;
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}
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other->move(x() + 40, y() + 40);
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other->show();
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}
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}
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}
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bool MainWindow::save()
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{
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if (isUntitled) {
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return saveAs();
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} else {
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return saveFile(curFile);
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}
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}
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bool MainWindow::saveAs()
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{
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QString fileName = QFileDialog::getSaveFileName(this, tr("Save As"),
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curFile);
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if (fileName.isEmpty())
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return false;
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return saveFile(fileName);
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}
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void MainWindow::about()
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{
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QMessageBox::about(this, tr("About SDI"),
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tr("The <b>SDI</b> example demonstrates how to write single "
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"document interface applications using Qt."));
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}
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void MainWindow::documentWasModified()
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{
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setWindowModified(true);
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}
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void MainWindow::init()
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{
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setAttribute(Qt::WA_DeleteOnClose);
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isUntitled = true;
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textEdit = new QTextEdit;
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setCentralWidget(textEdit);
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createActions();
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createMenus();
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createToolBars();
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createStatusBar();
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readSettings();
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connect(textEdit->document(), SIGNAL(contentsChanged()),
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this, SLOT(documentWasModified()));
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setUnifiedTitleAndToolBarOnMac(true);
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}
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void MainWindow::createActions()
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{
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newAct = new QAction(QIcon(":/images/new.png"), tr("&New"), this);
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newAct->setShortcuts(QKeySequence::New);
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newAct->setStatusTip(tr("Create a new file"));
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connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
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openAct = new QAction(QIcon(":/images/open.png"), tr("&Open..."), this);
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openAct->setShortcuts(QKeySequence::Open);
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openAct->setStatusTip(tr("Open an existing file"));
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connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
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saveAct = new QAction(QIcon(":/images/save.png"), tr("&Save"), this);
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saveAct->setShortcuts(QKeySequence::Save);
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saveAct->setStatusTip(tr("Save the document to disk"));
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connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));
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saveAsAct = new QAction(tr("Save &As..."), this);
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saveAsAct->setShortcuts(QKeySequence::SaveAs);
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saveAsAct->setStatusTip(tr("Save the document under a new name"));
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connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAs()));
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closeAct = new QAction(tr("&Close"), this);
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closeAct->setShortcut(tr("Ctrl+W"));
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closeAct->setStatusTip(tr("Close this window"));
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connect(closeAct, SIGNAL(triggered()), this, SLOT(close()));
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exitAct = new QAction(tr("E&xit"), this);
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exitAct->setShortcuts(QKeySequence::Quit);
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exitAct->setStatusTip(tr("Exit the application"));
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connect(exitAct, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()));
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cutAct = new QAction(QIcon(":/images/cut.png"), tr("Cu&t"), this);
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cutAct->setShortcuts(QKeySequence::Cut);
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cutAct->setStatusTip(tr("Cut the current selection's contents to the "
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"clipboard"));
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connect(cutAct, SIGNAL(triggered()), textEdit, SLOT(cut()));
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copyAct = new QAction(QIcon(":/images/copy.png"), tr("&Copy"), this);
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copyAct->setShortcuts(QKeySequence::Copy);
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copyAct->setStatusTip(tr("Copy the current selection's contents to the "
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"clipboard"));
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connect(copyAct, SIGNAL(triggered()), textEdit, SLOT(copy()));
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pasteAct = new QAction(QIcon(":/images/paste.png"), tr("&Paste"), this);
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pasteAct->setShortcuts(QKeySequence::Paste);
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pasteAct->setStatusTip(tr("Paste the clipboard's contents into the current "
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"selection"));
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connect(pasteAct, SIGNAL(triggered()), textEdit, SLOT(paste()));
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aboutAct = new QAction(tr("&About"), this);
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aboutAct->setStatusTip(tr("Show the application's About box"));
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connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
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aboutQtAct = new QAction(tr("About &Qt"), this);
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aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
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connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
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cutAct->setEnabled(false);
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copyAct->setEnabled(false);
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connect(textEdit, SIGNAL(copyAvailable(bool)),
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cutAct, SLOT(setEnabled(bool)));
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connect(textEdit, SIGNAL(copyAvailable(bool)),
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copyAct, SLOT(setEnabled(bool)));
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}
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//! [implicit tr context]
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void MainWindow::createMenus()
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{
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fileMenu = menuBar()->addMenu(tr("&File"));
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//! [implicit tr context]
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fileMenu->addAction(newAct);
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fileMenu->addAction(openAct);
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fileMenu->addAction(saveAct);
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fileMenu->addAction(saveAsAct);
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fileMenu->addSeparator();
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fileMenu->addAction(closeAct);
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fileMenu->addAction(exitAct);
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editMenu = menuBar()->addMenu(tr("&Edit"));
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editMenu->addAction(cutAct);
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editMenu->addAction(copyAct);
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editMenu->addAction(pasteAct);
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menuBar()->addSeparator();
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helpMenu = menuBar()->addMenu(tr("&Help"));
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helpMenu->addAction(aboutAct);
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helpMenu->addAction(aboutQtAct);
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}
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void MainWindow::createToolBars()
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{
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//! [0]
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fileToolBar = addToolBar(tr("File"));
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fileToolBar->addAction(newAct);
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fileToolBar->addAction(openAct);
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//! [0]
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fileToolBar->addAction(saveAct);
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editToolBar = addToolBar(tr("Edit"));
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editToolBar->addAction(cutAct);
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editToolBar->addAction(copyAct);
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editToolBar->addAction(pasteAct);
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}
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void MainWindow::createStatusBar()
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{
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statusBar()->showMessage(tr("Ready"));
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}
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void MainWindow::readSettings()
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{
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QSettings settings;
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QPoint pos = settings.value("pos", QPoint(200, 200)).toPoint();
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QSize size = settings.value("size", QSize(400, 400)).toSize();
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move(pos);
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resize(size);
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}
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void MainWindow::writeSettings()
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{
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QSettings settings;
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settings.setValue("pos", pos());
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settings.setValue("size", size());
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}
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bool MainWindow::maybeSave()
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{
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if (textEdit->document()->isModified()) {
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QMessageBox::StandardButton ret;
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ret = QMessageBox::warning(this, tr("SDI"),
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tr("The document has been modified.\n"
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"Do you want to save your changes?"),
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QMessageBox::Save | QMessageBox::Discard
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| QMessageBox::Cancel);
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if (ret == QMessageBox::Save)
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return save();
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else if (ret == QMessageBox::Cancel)
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return false;
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}
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return true;
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}
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void MainWindow::loadFile(const QString &fileName)
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{
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QFile file(fileName);
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if (!file.open(QFile::ReadOnly | QFile::Text)) {
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QMessageBox::warning(this, tr("SDI"),
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tr("Cannot read file %1:\n%2.")
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.arg(fileName)
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.arg(file.errorString()));
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return;
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}
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QTextStream in(&file);
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QApplication::setOverrideCursor(Qt::WaitCursor);
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textEdit->setPlainText(in.readAll());
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QApplication::restoreOverrideCursor();
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setCurrentFile(fileName);
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statusBar()->showMessage(tr("File loaded"), 2000);
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}
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bool MainWindow::saveFile(const QString &fileName)
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{
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QFile file(fileName);
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if (!file.open(QFile::WriteOnly | QFile::Text)) {
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QMessageBox::warning(this, tr("SDI"),
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tr("Cannot write file %1:\n%2.")
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.arg(fileName)
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.arg(file.errorString()));
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return false;
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}
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QTextStream out(&file);
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QApplication::setOverrideCursor(Qt::WaitCursor);
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out << textEdit->toPlainText();
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QApplication::restoreOverrideCursor();
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setCurrentFile(fileName);
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statusBar()->showMessage(tr("File saved"), 2000);
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return true;
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}
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void MainWindow::setCurrentFile(const QString &fileName)
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{
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static int sequenceNumber = 1;
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isUntitled = fileName.isEmpty();
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if (isUntitled) {
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curFile = tr("document%1.txt").arg(sequenceNumber++);
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} else {
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curFile = QFileInfo(fileName).canonicalFilePath();
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}
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textEdit->document()->setModified(false);
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setWindowModified(false);
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setWindowFilePath(curFile);
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}
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QString MainWindow::strippedName(const QString &fullFileName)
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{
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return QFileInfo(fullFileName).fileName();
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}
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MainWindow *MainWindow::findMainWindow(const QString &fileName)
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{
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QString canonicalFilePath = QFileInfo(fileName).canonicalFilePath();
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foreach (QWidget *widget, qApp->topLevelWidgets()) {
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MainWindow *mainWin = qobject_cast<MainWindow *>(widget);
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if (mainWin && mainWin->curFile == canonicalFilePath)
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return mainWin;
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}
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return 0;
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}
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