diff -r 000000000000 -r 1918ee327afb examples/mainwindows/recentfiles/mainwindow.cpp --- /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 + +#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(sender()); + if (action) + loadFile(action->data().toString()); +} + +void MainWindow::about() +{ + QMessageBox::about(this, tr("About Recent Files"), + tr("The Recent Files 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(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(); +}