mainwindow.cpp Example File

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  #include <QtCore/QLibraryInfo>
  #include <QtWidgets/QApplication>
  #include <QtWidgets/QAction>
  #include <QtWidgets/QMenu>
  #include <QtWidgets/QMenuBar>
  #include <QtWidgets/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("/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);
  }