The Application Main Window (4.6.3)

Qt 4 provides the following classes for managing main windows and associated user interface components:
QMainWindow
QDockWidget
QToolBar

 

The QMainWindow::menuBar() function will automatically create the menu bar the first time it is called. You can also call QMainWindow::setMenuBar() to use a custom menu bar in the main window.

QAction * newAct = new QAction(tr("&New"), this);
newAct->setShortcuts(QKeySequence::New);
newAct->setStatusTip(tr("Create a new file"));
connect(newAct, SIGNAL(triggered()), this, SLOT(newFile()));
    
QMenu * fileMenu = menuBar()->addMenu(tr("&File"));
fileMenu->addAction(newAct);
...
fileMenu->addSeparator();

fileToolBar = addToolBar(tr("File"));
fileToolBar->addAction(newAct);
fileToolBar->addAction(openAct);
...
fileToolbar->setAllowedAreas(Qt::TopToolBarArea | Qt::BottomToolBarArea);
addToolBar(Qt::TopToolBarArea, fileToolbar);

QDockWidget is used in a similar way to QToolBar. We create a dock widget as a child of the main window, and add widgets as children of the dock widget:

contentsWindow = new QDockWidget(tr("Table of Contents"), this);
contentsWindow->setAllowedAreas(Qt::LeftDockWidgetArea | Qt::RightDockWidgetArea);
addDockWidget(Qt::LeftDockWidgetArea, contentsWindow);

headingList = new QListWidget(contentsWindow);
contentsWindow->setWidget(headingList);