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-/****************************************************************************
- **
- ** Copyright (C) 2004-2005 Trolltech AS. All rights reserved.
- **
- ** This file is part of the documentation of the Qt Toolkit.
- **
- ** This file may be used under the terms of the GNU General Public
-** License version 2.0 as published by the Free Software Foundation
-** and appearing in the file LICENSE.GPL included in the packaging of
-** this file. Please review the following information to ensure GNU
-** General Public Licensing requirements will be met:
-** http://www.trolltech.com/products/qt/opensource.html
-**
-** If you are unsure which license is appropriate for your use, please
-** review the following information:
-** http://www.trolltech.com/products/qt/licensing.html or contact the
-** sales department at sales@trolltech.com.
- **
- ** This file is provided AS IS with NO WARRANTY OF ANY KIND, INCLUDING THE
- ** WARRANTY OF DESIGN, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
- **
- ****************************************************************************/
-
- #include <QtGui>
-
- #include "mainwindow.h"
-
- MainWindow::MainWindow()
- {
- textEdit = new QTextEdit;
- setCentralWidget(textEdit);
-
- createActions();
- createMenus();
- createToolBars();
- createStatusBar();
-
- readSettings();
-
- connect(textEdit->document(), SIGNAL(contentsChanged()),
- this, SLOT(documentWasModified()));
-
- setCurrentFile("");
- }
-
- void MainWindow::closeEvent(QCloseEvent *event)
- {
- if (maybeSave()) {
- writeSettings();
- event->accept();
- } else {
- event->ignore();
- }
- }
-
- void MainWindow::newFile()
- {
- if (maybeSave()) {
- textEdit->clear();
- setCurrentFile("");
- }
- }
-
- void MainWindow::open()
- {
- if (maybeSave()) {
- QString fileName = QFileDialog::getOpenFileName(this);
- if (!fileName.isEmpty())
- loadFile(fileName);
- }
- }
-
- bool MainWindow::save()
- {
- if (curFile.isEmpty()) {
- return saveAs();
- } else {
- return saveFile(curFile);
- }
- }
-
- bool MainWindow::saveAs()
- {
- QString fileName = QFileDialog::getSaveFileName(this);
- if (fileName.isEmpty())
- return false;
-
- return saveFile(fileName);
- }
-
- void MainWindow::about()
- {
- QMessageBox::about(this, tr("About Application"),
- tr("The <b>Application</b> example demonstrates how to "
- "write modern GUI applications using Qt, with a menu bar, "
- "toolbars, and a status bar."));
- }
-
- void MainWindow::documentWasModified()
- {
- setWindowModified(true);
- }
-
- void MainWindow::createActions()
- {
- newAct = new QAction(QIcon(":/images/new.png"), tr("&New"), this);
- newAct->setShortcut(tr("Ctrl+N"));
- newAct->setStatusTip(tr("Create a new file"));
- connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
-
- openAct = new QAction(QIcon(":/images/open.png"), tr("&Open..."), this);
- openAct->setShortcut(tr("Ctrl+O"));
- openAct->setStatusTip(tr("Open an existing file"));
- connect(openAct, SIGNAL(triggered()), this, SLOT(open()));
-
- saveAct = new QAction(QIcon(":/images/save.png"), tr("&Save"), this);
- saveAct->setShortcut(tr("Ctrl+S"));
- saveAct->setStatusTip(tr("Save the document to disk"));
- connect(saveAct, SIGNAL(triggered()), this, SLOT(save()));
-
- saveAsAct = new QAction(tr("Save &As..."), this);
- saveAsAct->setStatusTip(tr("Save the document under a new name"));
- connect(saveAsAct, SIGNAL(triggered()), this, SLOT(saveAs()));
-
- exitAct = new QAction(tr("E&xit"), this);
- exitAct->setShortcut(tr("Ctrl+Q"));
- exitAct->setStatusTip(tr("Exit the application"));
- connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));
-
- cutAct = new QAction(QIcon(":/images/cut.png"), tr("Cu&t"), this);
- cutAct->setShortcut(tr("Ctrl+X"));
- cutAct->setStatusTip(tr("Cut the current selection's contents to the "
- "clipboard"));
- connect(cutAct, SIGNAL(triggered()), textEdit, SLOT(cut()));
-
- copyAct = new QAction(QIcon(":/images/copy.png"), tr("&Copy"), this);
- copyAct->setShortcut(tr("Ctrl+C"));
- copyAct->setStatusTip(tr("Copy the current selection's contents to the "
- "clipboard"));
- connect(copyAct, SIGNAL(triggered()), textEdit, SLOT(copy()));
-
- pasteAct = new QAction(QIcon(":/images/paste.png"), tr("&Paste"), this);
- pasteAct->setShortcut(tr("Ctrl+V"));
- pasteAct->setStatusTip(tr("Paste the clipboard's contents into the current "
- "selection"));
- connect(pasteAct, SIGNAL(triggered()), textEdit, SLOT(paste()));
-
- 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()));
-
- cutAct->setEnabled(false);
- copyAct->setEnabled(false);
- connect(textEdit, SIGNAL(copyAvailable(bool)),
- cutAct, SLOT(setEnabled(bool)));
- connect(textEdit, SIGNAL(copyAvailable(bool)),
- copyAct, SLOT(setEnabled(bool)));
- }
-
- void MainWindow::createMenus()
- {
- fileMenu = menuBar()->addMenu(tr("&File"));
- fileMenu->addAction(newAct);
- fileMenu->addAction(openAct);
- fileMenu->addAction(saveAct);
- fileMenu->addAction(saveAsAct);
- fileMenu->addSeparator();
- fileMenu->addAction(exitAct);
-
- editMenu = menuBar()->addMenu(tr("&Edit"));
- editMenu->addAction(cutAct);
- editMenu->addAction(copyAct);
- editMenu->addAction(pasteAct);
-
- menuBar()->addSeparator();
-
- helpMenu = menuBar()->addMenu(tr("&Help"));
- helpMenu->addAction(aboutAct);
- helpMenu->addAction(aboutQtAct);
- }
-
- void MainWindow::createToolBars()
- {
- fileToolBar = addToolBar(tr("File"));
- fileToolBar->addAction(newAct);
- fileToolBar->addAction(openAct);
- fileToolBar->addAction(saveAct);
-
- editToolBar = addToolBar(tr("Edit"));
- editToolBar->addAction(cutAct);
- editToolBar->addAction(copyAct);
- editToolBar->addAction(pasteAct);
- }
-
- void MainWindow::createStatusBar()
- {
- statusBar()->showMessage(tr("Ready"));
- }
-
- void MainWindow::readSettings()
- {
- QSettings settings("Trolltech", "Application Example");
- QPoint pos = settings.value("pos", QPoint(200, 200)).toPoint();
- QSize size = settings.value("size", QSize(400, 400)).toSize();
- resize(size);
- move(pos);
- }
-
- void MainWindow::writeSettings()
- {
- QSettings settings("Trolltech", "Application Example");
- settings.setValue("pos", pos());
- settings.setValue("size", size());
- }
-
- bool MainWindow::maybeSave()
- {
- if (textEdit->document()->isModified()) {
- int ret = QMessageBox::warning(this, tr("Application"),
- tr("The document has been modified.\n"
- "Do you want to save your changes?"),
- QMessageBox::Yes | QMessageBox::Default,
- QMessageBox::No,
- QMessageBox::Cancel | QMessageBox::Escape);
- if (ret == QMessageBox::Yes)
- return save();
- else if (ret == QMessageBox::Cancel)
- return false;
- }
- return true;
- }
-
- void MainWindow::loadFile(const QString &fileName)
- {
- QFile file(fileName);
- if (!file.open(QFile::ReadOnly | QFile::Text)) {
- QMessageBox::warning(this, tr("Application"),
- 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);
- }
-
- bool MainWindow::saveFile(const QString &fileName)
- {
- QFile file(fileName);
- if (!file.open(QFile::WriteOnly | QFile::Text)) {
- QMessageBox::warning(this, tr("Application"),
- tr("Cannot write file %1:\n%2.")
- .arg(fileName)
- .arg(file.errorString()));
- return false;
- }
-
- QTextStream out(&file);
- QApplication::setOverrideCursor(Qt::WaitCursor);
- out << textEdit->toPlainText();
- QApplication::restoreOverrideCursor();
-
- setCurrentFile(fileName);
- statusBar()->showMessage(tr("File saved"), 2000);
- return true;
- }
-
- void MainWindow::setCurrentFile(const QString &fileName)
- {
- curFile = fileName;
- textEdit->document()->setModified(false);
- setWindowModified(false);
-
- QString shownName;
- if (curFile.isEmpty())
- shownName = "untitled.txt";
- else
- shownName = strippedName(curFile);
-
- setWindowTitle(tr("%1[*] - %2").arg(shownName).arg(tr("Application")));
- }
-
- QString MainWindow::strippedName(const QString &fullFileName)
- {
- return QFileInfo(fullFileName).fileName();
- }
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