Qt Reference Documentation

mainwindow.cpp Example File

help/simpletextviewer/mainwindow.cpp
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 #include <QtCore/QLibraryInfo>
 #include <QtGui/QApplication>
 #include <QtGui/QAction>
 #include <QtGui/QMenu>
 #include <QtGui/QMenuBar>
 #include <QtGui/QMessageBox>

 #include "mainwindow.h"
 #include "findfiledialog.h"
 #include "assistant.h"
 #include "textedit.h"

 // ![0]
 MainWindow::MainWindow()
 {
     assistant = new Assistant;
 // ![0]
     textViewer = new TextEdit;
     textViewer->setContents(QLibraryInfo::location(QLibraryInfo::ExamplesPath)
             + QLatin1String("/help/simpletextviewer/documentation/intro.html"));
     setCentralWidget(textViewer);

     createActions();
     createMenus();

     setWindowTitle(tr("Simple Text Viewer"));
     resize(750, 400);
 // ![1]
 }

 void MainWindow::closeEvent(QCloseEvent *)
 {
     delete assistant;
 }

 void MainWindow::about()
 {
     QMessageBox::about(this, tr("About Simple Text Viewer"),
                        tr("This example demonstrates how to use\n"
                           "Qt Assistant as help system for your\n"
                           "own application."));
 }

 void MainWindow::showDocumentation()
 {
     assistant->showDocumentation("index.html");
 }

 void MainWindow::open()
 {
     FindFileDialog dialog(textViewer, assistant);
     dialog.exec();
 }

 void MainWindow::createActions()
 {
     assistantAct = new QAction(tr("Help Contents"), this);
     assistantAct->setShortcut(QKeySequence::HelpContents);
     connect(assistantAct, SIGNAL(triggered()), this, SLOT(showDocumentation()));

     openAct = new QAction(tr("&Open..."), this);
     openAct->setShortcut(QKeySequence::Open);
     connect(openAct, SIGNAL(triggered()), this, SLOT(open()));

     clearAct = new QAction(tr("&Clear"), this);
     clearAct->setShortcut(tr("Ctrl+C"));
     connect(clearAct, SIGNAL(triggered()), textViewer, SLOT(clear()));

     exitAct = new QAction(tr("E&xit"), this);
     exitAct->setShortcuts(QKeySequence::Quit);
     connect(exitAct, SIGNAL(triggered()), this, SLOT(close()));

     aboutAct = new QAction(tr("&About"), this);
     connect(aboutAct, SIGNAL(triggered()), this, SLOT(about()));

     aboutQtAct = new QAction(tr("About &Qt"), this);
     connect(aboutQtAct, SIGNAL(triggered()), qApp, SLOT(aboutQt()));
 }

 void MainWindow::createMenus()
 {
     fileMenu = new QMenu(tr("&File"), this);
     fileMenu->addAction(openAct);
     fileMenu->addAction(clearAct);
     fileMenu->addSeparator();
     fileMenu->addAction(exitAct);

     helpMenu = new QMenu(tr("&Help"), this);
     helpMenu->addAction(assistantAct);
     helpMenu->addSeparator();
     helpMenu->addAction(aboutAct);
     helpMenu->addAction(aboutQtAct);

     menuBar()->addMenu(fileMenu);
     menuBar()->addMenu(helpMenu);
 }
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