Simple Text Viewer Example

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

#include <QAction>
#include <QApplication>
#include <QLibraryInfo>
#include <QMenu>
#include <QMenuBar>
#include <QMessageBox>

// ![0]
MainWindow::MainWindow()
{
    assistant = new Assistant;
// ![0]
    textViewer = new TextEdit;
    textViewer->setContents(QLibraryInfo::location(QLibraryInfo::ExamplesPath)
            + QLatin1String("/assistant/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);
}