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>
252 lines
8.0 KiB
C++
252 lines
8.0 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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setAttribute(Qt::WA_DeleteOnClose);
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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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(void)statusBar();
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setWindowFilePath(QString());
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resize(400, 300);
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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->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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loadFile(fileName);
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}
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void MainWindow::save()
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{
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if (curFile.isEmpty())
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saveAs();
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else
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saveFile(curFile);
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}
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void MainWindow::saveAs()
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{
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QString fileName = QFileDialog::getSaveFileName(this);
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if (fileName.isEmpty())
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return;
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saveFile(fileName);
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}
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void MainWindow::openRecentFile()
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{
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QAction *action = qobject_cast<QAction *>(sender());
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if (action)
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loadFile(action->data().toString());
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}
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void MainWindow::about()
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{
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QMessageBox::about(this, tr("About Recent Files"),
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tr("The <b>Recent Files</b> example demonstrates how to provide a "
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"recently used file menu in a Qt application."));
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}
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void MainWindow::createActions()
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{
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newAct = new QAction(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(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(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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for (int i = 0; i < MaxRecentFiles; ++i) {
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recentFileActs[i] = new QAction(this);
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recentFileActs[i]->setVisible(false);
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connect(recentFileActs[i], SIGNAL(triggered()),
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this, SLOT(openRecentFile()));
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}
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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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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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}
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void MainWindow::createMenus()
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{
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fileMenu = menuBar()->addMenu(tr("&File"));
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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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separatorAct = fileMenu->addSeparator();
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for (int i = 0; i < MaxRecentFiles; ++i)
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fileMenu->addAction(recentFileActs[i]);
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fileMenu->addSeparator();
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fileMenu->addAction(exitAct);
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updateRecentFileActions();
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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::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("Recent Files"),
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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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void 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("Recent Files"),
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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;
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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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}
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void MainWindow::setCurrentFile(const QString &fileName)
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{
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curFile = fileName;
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setWindowFilePath(curFile);
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QSettings settings;
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QStringList files = settings.value("recentFileList").toStringList();
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files.removeAll(fileName);
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files.prepend(fileName);
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while (files.size() > MaxRecentFiles)
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files.removeLast();
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settings.setValue("recentFileList", files);
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foreach (QWidget *widget, QApplication::topLevelWidgets()) {
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MainWindow *mainWin = qobject_cast<MainWindow *>(widget);
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if (mainWin)
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mainWin->updateRecentFileActions();
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}
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}
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void MainWindow::updateRecentFileActions()
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{
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QSettings settings;
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QStringList files = settings.value("recentFileList").toStringList();
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int numRecentFiles = qMin(files.size(), (int)MaxRecentFiles);
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for (int i = 0; i < numRecentFiles; ++i) {
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QString text = tr("&%1 %2").arg(i + 1).arg(strippedName(files[i]));
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recentFileActs[i]->setText(text);
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recentFileActs[i]->setData(files[i]);
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recentFileActs[i]->setVisible(true);
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}
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for (int j = numRecentFiles; j < MaxRecentFiles; ++j)
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recentFileActs[j]->setVisible(false);
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separatorAct->setVisible(numRecentFiles > 0);
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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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