Examples: Cleanup and modernize Plug&Paint

* Use C++11 member init
* Use auto where appropriate
* Replace foreach with range-for
* Replace last Qt4-style connects
* Sort includes to common style
* Fix some Clang warnings

Task-number: QTBUG-60635
Change-Id: I61c98b34b954e416dd175b56ca589125217083de
Reviewed-by: Venugopal Shivashankar <Venugopal.Shivashankar@qt.io>
Reviewed-by: Paul Wicking <paul.wicking@qt.io>
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>

1 files changed, 6 insertions, 6 deletions

diff --git a/examples/widgets/tools/plugandpaint/app/paintarea.h b/examples/widgets/tools/plugandpaint/app/paintarea.h
index 1c8ee1ee1b..1d1e6006c8 100644
--- a/examples/widgets/tools/plugandpaint/app/paintarea.h
+++ b/examples/widgets/tools/plugandpaint/app/paintarea.h
@@ -63,7 +63,7 @@ class PaintArea : public QWidget
     Q_OBJECT
 
 public:
-    PaintArea(QWidget *parent = 0);
+    PaintArea(QWidget *parent = nullptr);
 
     bool openImage(const QString &fileName);
     bool saveImage(const QString &fileName, const char *fileFormat);
@@ -87,13 +87,13 @@ protected:
 private:
     void setupPainter(QPainter &painter);
 
-    QImage theImage;
-    QColor color;
-    int thickness;
+    QImage theImage = {500, 400, QImage::Format_RGB32};
+    QColor color = Qt::blue;
+    int thickness = 3;
 
-    BrushInterface *brushInterface;
+    BrushInterface *brushInterface = nullptr;
     QString brush;
-    QPoint lastPos;
+    QPoint lastPos = {-1, -1};
 
     QPainterPath pendingPath;
 };