1 files changed, 15 insertions, 5 deletions
diff --git a/examples/corelib/threads/mandelbrot/mandelbrotwidget.h b/examples/corelib/threads/mandelbrot/mandelbrotwidget.h
index 68c4a6f4f7..0d0fce56b3 100644
--- a/examples/corelib/threads/mandelbrot/mandelbrotwidget.h
+++ b/examples/corelib/threads/mandelbrot/mandelbrotwidget.h
@@ -4,20 +4,26 @@
 #ifndef MANDELBROTWIDGET_H
 #define MANDELBROTWIDGET_H
 
+#include "renderthread.h"
+
+#include <QCoreApplication>
 #include <QPixmap>
 #include <QWidget>
-#include "renderthread.h"
 
+QT_BEGIN_NAMESPACE
+class QGestureEvent;
+QT_END_NAMESPACE
 
 //! [0]
 class MandelbrotWidget : public QWidget
 {
-    Q_OBJECT
+    Q_DECLARE_TR_FUNCTIONS(MandelbrotWidget)
 
 public:
     MandelbrotWidget(QWidget *parent = nullptr);
 
 protected:
+    QSize sizeHint() const override { return {1024, 768}; };
     void paintEvent(QPaintEvent *event) override;
     void resizeEvent(QResizeEvent *event) override;
     void keyPressEvent(QKeyEvent *event) override;
@@ -27,13 +33,17 @@ protected:
     void mousePressEvent(QMouseEvent *event) override;
     void mouseMoveEvent(QMouseEvent *event) override;
     void mouseReleaseEvent(QMouseEvent *event) override;
+#ifndef QT_NO_GESTURES
+    bool event(QEvent *event) override;
+#endif
 
-private slots:
+private:
     void updatePixmap(const QImage &image, double scaleFactor);
     void zoom(double zoomFactor);
-
-private:
     void scroll(int deltaX, int deltaY);
+#ifndef QT_NO_GESTURES
+    bool gestureEvent(QGestureEvent *event);
+#endif
 
     RenderThread thread;
     QPixmap pixmap;