5 files changed, 13 insertions, 6 deletions
diff --git a/examples/opengl/2dpainting/2dpainting.pro b/examples/opengl/2dpainting/2dpainting.pro
index 08383a4d39..b9611f5b40 100644
--- a/examples/opengl/2dpainting/2dpainting.pro
+++ b/examples/opengl/2dpainting/2dpainting.pro
@@ -1,4 +1,4 @@
-QT          += opengl widgets
+QT          += widgets
 
 HEADERS     = glwidget.h \
               helper.h \
diff --git a/examples/opengl/2dpainting/glwidget.cpp b/examples/opengl/2dpainting/glwidget.cpp
index 0443d5b5bd..5e040ae347 100644
--- a/examples/opengl/2dpainting/glwidget.cpp
+++ b/examples/opengl/2dpainting/glwidget.cpp
@@ -41,11 +41,12 @@
 #include "glwidget.h"
 #include "helper.h"
 
+#include <QPainter>
 #include <QTimer>
 
 //! [0]
 GLWidget::GLWidget(Helper *helper, QWidget *parent)
-    : QGLWidget(QGLFormat(QGL::SampleBuffers), parent), helper(helper)
+    : QOpenGLWidget(parent), helper(helper)
 {
     elapsed = 0;
     setFixedSize(200, 200);
@@ -57,7 +58,7 @@ GLWidget::GLWidget(Helper *helper, QWidget *parent)
 void GLWidget::animate()
 {
     elapsed = (elapsed + qobject_cast<QTimer*>(sender())->interval()) % 1000;
-    repaint();
+    update();
 }
 //! [1]
 
diff --git a/examples/opengl/2dpainting/glwidget.h b/examples/opengl/2dpainting/glwidget.h
index fec1be12f7..07b279117c 100644
--- a/examples/opengl/2dpainting/glwidget.h
+++ b/examples/opengl/2dpainting/glwidget.h
@@ -41,12 +41,12 @@
 #ifndef GLWIDGET_H
 #define GLWIDGET_H
 
-#include <QGLWidget>
+#include <QOpenGLWidget>
 
 //! [0]
 class Helper;
 
-class GLWidget : public QGLWidget
+class GLWidget : public QOpenGLWidget
 {
     Q_OBJECT
 
diff --git a/examples/opengl/2dpainting/main.cpp b/examples/opengl/2dpainting/main.cpp
index 5daff5c66f..fb3454b1cd 100644
--- a/examples/opengl/2dpainting/main.cpp
+++ b/examples/opengl/2dpainting/main.cpp
@@ -41,10 +41,16 @@
 #include "window.h"
 
 #include <QApplication>
+#include <QSurfaceFormat>
 
 int main(int argc, char *argv[])
 {
     QApplication app(argc, argv);
+
+    QSurfaceFormat fmt;
+    fmt.setSamples(4);
+    QSurfaceFormat::setDefaultFormat(fmt);
+
     Window window;
     window.show();
     return app.exec();
diff --git a/examples/opengl/2dpainting/widget.cpp b/examples/opengl/2dpainting/widget.cpp
index 12b7935a94..edfff5ba79 100644
--- a/examples/opengl/2dpainting/widget.cpp
+++ b/examples/opengl/2dpainting/widget.cpp
@@ -57,7 +57,7 @@ Widget::Widget(Helper *helper, QWidget *parent)
 void Widget::animate()
 {
     elapsed = (elapsed + qobject_cast<QTimer*>(sender())->interval()) % 1000;
-    repaint();
+    update();
 }
 //! [1]