Polish DnD Examples.

- Remove class DragLabel in draggabletext and add a static creation
  function instead since it only has a constructor setting some
  properties.
- Use QRegularExpression instead of QRegExp
- Use new connection syntax.
- Ensure compilation with
  DEFINES += QT_NO_CAST_TO_ASCII QT_NO_CAST_FROM_ASCII
  demonstrating use of QLatin1String vs QStringLiteral.
- Streamline code.

Change-Id: I2e2ddeb40837dba379990836c77fb72ad7263e2d
Reviewed-by: Oliver Wolff <oliver.wolff@theqtcompany.com>

1 files changed, 1 insertions, 1 deletions

diff --git a/examples/widgets/draganddrop/puzzle/main.cpp b/examples/widgets/draganddrop/puzzle/main.cpp
index 706ebe4d70..e8ecbe37db 100644
--- a/examples/widgets/draganddrop/puzzle/main.cpp
+++ b/examples/widgets/draganddrop/puzzle/main.cpp
@@ -48,7 +48,7 @@ int main(int argc, char *argv[])
 
     QApplication app(argc, argv);
     MainWindow window;
-    window.openImage(":/images/example.jpg");
+    window.loadImage(QStringLiteral(":/images/example.jpg"));
     window.show();
     return app.exec();
 }