--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/examples/mainwindows/recentfiles/mainwindow.cpp Mon Jan 11 14:00:40 2010 +0000
@@ -0,0 +1,252 @@
+/****************************************************************************
+**
+** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
+** All rights reserved.
+** Contact: Nokia Corporation (qt-info@nokia.com)
+**
+** This file is part of the examples of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** No Commercial Usage
+** This file contains pre-release code and may not be distributed.
+** You may use this file in accordance with the terms and conditions
+** contained in the Technology Preview License Agreement accompanying
+** this package.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file. Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Nokia gives you certain additional
+** rights. These rights are described in the Nokia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** If you have questions regarding the use of this file, please contact
+** Nokia at qt-info@nokia.com.
+**
+**
+**
+**
+**
+**
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#include <QtGui>
+
+#include "mainwindow.h"
+
+MainWindow::MainWindow()
+{
+ setAttribute(Qt::WA_DeleteOnClose);
+
+ textEdit = new QTextEdit;
+ setCentralWidget(textEdit);
+
+ createActions();
+ createMenus();
+ (void)statusBar();
+
+ setWindowFilePath(QString());
+ resize(400, 300);
+}
+
+void MainWindow::newFile()
+{
+ MainWindow *other = new MainWindow;
+ other->show();
+}
+
+void MainWindow::open()
+{
+ QString fileName = QFileDialog::getOpenFileName(this);
+ if (!fileName.isEmpty())
+ loadFile(fileName);
+}
+
+void MainWindow::save()
+{
+ if (curFile.isEmpty())
+ saveAs();
+ else
+ saveFile(curFile);
+}
+
+void MainWindow::saveAs()
+{
+ QString fileName = QFileDialog::getSaveFileName(this);
+ if (fileName.isEmpty())
+ return;
+
+ saveFile(fileName);
+}
+
+void MainWindow::openRecentFile()
+{
+ QAction *action = qobject_cast<QAction *>(sender());
+ if (action)
+ loadFile(action->data().toString());
+}
+
+void MainWindow::about()
+{
+ QMessageBox::about(this, tr("About Recent Files"),
+ tr("The <b>Recent Files</b> example demonstrates how to provide a "
+ "recently used file menu in a Qt application."));
+}
+
+void MainWindow::createActions()
+{
+ newAct = new QAction(tr("&New"), this);
+ newAct->setShortcuts(QKeySequence::New);
+ newAct->setStatusTip(tr("Create a new file"));
+ connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
+
+ openAct = new QAction(tr("&Open..."), this);
+ openAct->setShortcuts(QKeySequence::Open);
+ openAct->setStatusTip(tr("Open an existing file"));
+ connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
+
+ saveAct = new QAction(tr("&Save"), this);
+ saveAct->setShortcuts(QKeySequence::Save);
+ saveAct->setStatusTip(tr("Save the document to disk"));
+ connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));
+
+ saveAsAct = new QAction(tr("Save &As..."), this);
+ saveAsAct->setShortcuts(QKeySequence::SaveAs);
+ saveAsAct->setStatusTip(tr("Save the document under a new name"));
+ connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAs()));
+
+ for (int i = 0; i < MaxRecentFiles; ++i) {
+ recentFileActs[i] = new QAction(this);
+ recentFileActs[i]->setVisible(false);
+ connect(recentFileActs[i], SIGNAL(triggered()),
+ this, SLOT(openRecentFile()));
+ }
+
+ exitAct = new QAction(tr("E&xit"), this);
+ exitAct->setShortcuts(QKeySequence::Quit);
+ exitAct->setStatusTip(tr("Exit the application"));
+ connect(exitAct, SIGNAL(triggered()), qApp, SLOT(closeAllWindows()));
+
+ aboutAct = new QAction(tr("&About"), this);
+ aboutAct->setStatusTip(tr("Show the application's About box"));
+ connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));
+
+ aboutQtAct = new QAction(tr("About &Qt"), this);
+ aboutQtAct->setStatusTip(tr("Show the Qt library's About box"));
+ connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
+}
+
+void MainWindow::createMenus()
+{
+ fileMenu = menuBar()->addMenu(tr("&File"));
+ fileMenu->addAction(newAct);
+ fileMenu->addAction(openAct);
+ fileMenu->addAction(saveAct);
+ fileMenu->addAction(saveAsAct);
+ separatorAct = fileMenu->addSeparator();
+ for (int i = 0; i < MaxRecentFiles; ++i)
+ fileMenu->addAction(recentFileActs[i]);
+ fileMenu->addSeparator();
+ fileMenu->addAction(exitAct);
+ updateRecentFileActions();
+
+ menuBar()->addSeparator();
+
+ helpMenu = menuBar()->addMenu(tr("&Help"));
+ helpMenu->addAction(aboutAct);
+ helpMenu->addAction(aboutQtAct);
+}
+
+void MainWindow::loadFile(const QString &fileName)
+{
+ QFile file(fileName);
+ if (!file.open(QFile::ReadOnly | QFile::Text)) {
+ QMessageBox::warning(this, tr("Recent Files"),
+ tr("Cannot read file %1:\n%2.")
+ .arg(fileName)
+ .arg(file.errorString()));
+ return;
+ }
+
+ QTextStream in(&file);
+ QApplication::setOverrideCursor(Qt::WaitCursor);
+ textEdit->setPlainText(in.readAll());
+ QApplication::restoreOverrideCursor();
+
+ setCurrentFile(fileName);
+ statusBar()->showMessage(tr("File loaded"), 2000);
+}
+
+void MainWindow::saveFile(const QString &fileName)
+{
+ QFile file(fileName);
+ if (!file.open(QFile::WriteOnly | QFile::Text)) {
+ QMessageBox::warning(this, tr("Recent Files"),
+ tr("Cannot write file %1:\n%2.")
+ .arg(fileName)
+ .arg(file.errorString()));
+ return;
+ }
+
+ QTextStream out(&file);
+ QApplication::setOverrideCursor(Qt::WaitCursor);
+ out << textEdit->toPlainText();
+ QApplication::restoreOverrideCursor();
+
+ setCurrentFile(fileName);
+ statusBar()->showMessage(tr("File saved"), 2000);
+}
+
+void MainWindow::setCurrentFile(const QString &fileName)
+{
+ curFile = fileName;
+ setWindowFilePath(curFile);
+
+ QSettings settings;
+ QStringList files = settings.value("recentFileList").toStringList();
+ files.removeAll(fileName);
+ files.prepend(fileName);
+ while (files.size() > MaxRecentFiles)
+ files.removeLast();
+
+ settings.setValue("recentFileList", files);
+
+ foreach (QWidget *widget, QApplication::topLevelWidgets()) {
+ MainWindow *mainWin = qobject_cast<MainWindow *>(widget);
+ if (mainWin)
+ mainWin->updateRecentFileActions();
+ }
+}
+
+void MainWindow::updateRecentFileActions()
+{
+ QSettings settings;
+ QStringList files = settings.value("recentFileList").toStringList();
+
+ int numRecentFiles = qMin(files.size(), (int)MaxRecentFiles);
+
+ for (int i = 0; i < numRecentFiles; ++i) {
+ QString text = tr("&%1 %2").arg(i + 1).arg(strippedName(files[i]));
+ recentFileActs[i]->setText(text);
+ recentFileActs[i]->setData(files[i]);
+ recentFileActs[i]->setVisible(true);
+ }
+ for (int j = numRecentFiles; j < MaxRecentFiles; ++j)
+ recentFileActs[j]->setVisible(false);
+
+ separatorAct->setVisible(numRecentFiles > 0);
+}
+
+QString MainWindow::strippedName(const QString &fullFileName)
+{
+ return QFileInfo(fullFileName).fileName();
+}