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, 3 insertions, 2 deletions

diff --git a/src/widgets/kernel/qaction.cpp b/src/widgets/kernel/qaction.cpp
index 9fbcf28aad..255ffbd258 100644
--- a/src/widgets/kernel/qaction.cpp
+++ b/src/widgets/kernel/qaction.cpp
@@ -228,8 +228,9 @@ void QActionPrivate::setShortcutEnabled(bool enable, QShortcutMap &map)
 
     \snippet mainwindows/application/mainwindow.cpp 19
     \codeline
-    \snippet mainwindows/application/mainwindow.cpp 28
-    \snippet mainwindows/application/mainwindow.cpp 31
+    \code
+    fileMenu->addAction(openAct);
+    \endcode
 
     We recommend that actions are created as children of the window
     they are used in. In most cases actions will be children of