5635823e17
As in the past, to avoid rewriting various autotests that contain line-number information, an extra blank line has been inserted at the end of the license text to ensure that this commit does not change the total number of lines in the license header. Change-Id: I311e001373776812699d6efc045b5f742890c689 Reviewed-by: Rohan McGovern <rohan.mcgovern@nokia.com>
373 lines
11 KiB
C++
373 lines
11 KiB
C++
/****************************************************************************
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**
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** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
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** Contact: http://www.qt-project.org/
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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 Nokia Corporation and its Subsidiary(-ies) nor
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** the names of its contributors may be used to endorse or promote
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** products derived from this software without specific prior written
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** permission.
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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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