Cleanup QtOpenGL examples

Cleanup the OpenGL examples
 - use nullptr (clang-tidy)
 - use member-initialization
 - avoid redundant checks for != nullptr when deleting a pointer

Change-Id: I3e4702690ed79e71c3e952d51ceef83b907b45b7
Reviewed-by: Edward Welbourne <edward.welbourne@qt.io>
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>

1 files changed, 3 insertions, 8 deletions

diff --git a/examples/gui/openglwindow/openglwindow.cpp b/examples/gui/openglwindow/openglwindow.cpp
index a0c85006bd..bac887dca0 100644
--- a/examples/gui/openglwindow/openglwindow.cpp
+++ b/examples/gui/openglwindow/openglwindow.cpp
@@ -50,18 +50,13 @@
 
 #include "openglwindow.h"
 
-#include <QtCore/QCoreApplication>
-
-#include <QtGui/QOpenGLContext>
-#include <QtGui/QOpenGLPaintDevice>
-#include <QtGui/QPainter>
+#include <QOpenGLContext>
+#include <QOpenGLPaintDevice>
+#include <QPainter>
 
 //! [1]
 OpenGLWindow::OpenGLWindow(QWindow *parent)
     : QWindow(parent)
-    , m_animating(false)
-    , m_context(0)
-    , m_device(0)
 {
     setSurfaceType(QWindow::OpenGLSurface);
 }