Polish the widgets/mainwindows/application example.

- Introduce Qt 5 signals & slot syntax
- Use QCommandLineParser to obtain file arguments
- Merge MainWindow::createMenus()/createQToolBars()
  into MainWindow::createActions(), removing the need
  to store the actions as member variables.
  Use QMenu::addAction() for brevity.
- Use QIcon::fromTheme() to obtain system icons and use
  resource icons as fallback.
- Rewrite settings code to use
  QWidget::saveGeometry(), Widget::restoreGeometry() since
  saving size and position does not work well with multiple
  screens. Query the available size when determining
  the initial size instead of using hard-coded values
  for High-DPI screens.
- Fix minor issues in code, use multi-argument version
  of QString::arg(), QDir::toNativeSeparators() to
  present file paths to the user.
- Fix snippet references accordingly.

Change-Id: I1bc49a8913aa6d669e0e666f04be3f1f42eaba10
Reviewed-by: Leena Miettinen <riitta-leena.miettinen@theqtcompany.com>
Reviewed-by: Topi Reiniö <topi.reinio@digia.com>

1 files changed, 14 insertions, 2 deletions

diff --git a/src/widgets/widgets/qmainwindow.cpp b/src/widgets/widgets/qmainwindow.cpp
index 935177867d..5d53e7def4 100644
--- a/src/widgets/widgets/qmainwindow.cpp
+++ b/src/widgets/widgets/qmainwindow.cpp
@@ -263,7 +263,14 @@ void QMainWindowPrivate::init()
 
     An example of how to create menus follows:
 
-    \snippet mainwindows/application/mainwindow.cpp 26
+    \code
+    void MainWindow::createMenus()
+    {
+        fileMenu = menuBar()->addMenu(tr("&File"));
+        fileMenu->addAction(newAct);
+        fileMenu->addAction(openAct);
+        fileMenu->addAction(saveAct);
+    \endcode
 
     The \c createPopupMenu() function creates popup menus when the
     main window receives context menu events.  The default
@@ -290,7 +297,12 @@ void QMainWindowPrivate::init()
 
     An example of toolbar creation follows:
 
-    \snippet mainwindows/application/mainwindow.cpp 29
+    \code
+    void MainWindow::createToolBars()
+    {
+        fileToolBar = addToolBar(tr("File"));
+        fileToolBar->addAction(newAct);
+    \endcode
 
     \section2 Creating Dock Widgets