6 files changed, 23 insertions, 23 deletions

diff --git a/examples/opengl/hellogl2/glwidget.cpp b/examples/opengl/hellogl2/glwidget.cpp
index 318adb5043..543e70f8ac 100644
--- a/examples/opengl/hellogl2/glwidget.cpp
+++ b/examples/opengl/hellogl2/glwidget.cpp
@@ -57,11 +57,7 @@
 bool GLWidget::m_transparent = false;
 
 GLWidget::GLWidget(QWidget *parent)
-    : QOpenGLWidget(parent),
-      m_xRot(0),
-      m_yRot(0),
-      m_zRot(0),
-      m_program(0)
+    : QOpenGLWidget(parent)
 {
     m_core = QSurfaceFormat::defaultFormat().profile() == QSurfaceFormat::CoreProfile;
     // --transparent causes the clear color to be transparent. Therefore, on systems that
@@ -133,7 +129,7 @@ void GLWidget::cleanup()
     makeCurrent();
     m_logoVbo.destroy();
     delete m_program;
-    m_program = 0;
+    m_program = nullptr;
     doneCurrent();
 }
 
@@ -250,8 +246,10 @@ void GLWidget::setupVertexAttribs()
     QOpenGLFunctions *f = QOpenGLContext::currentContext()->functions();
     f->glEnableVertexAttribArray(0);
     f->glEnableVertexAttribArray(1);
-    f->glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), 0);
-    f->glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat), reinterpret_cast<void *>(3 * sizeof(GLfloat)));
+    f->glVertexAttribPointer(0, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat),
+                             nullptr);
+    f->glVertexAttribPointer(1, 3, GL_FLOAT, GL_FALSE, 6 * sizeof(GLfloat),
+                             reinterpret_cast<void *>(3 * sizeof(GLfloat)));
     m_logoVbo.release();
 }
 
diff --git a/examples/opengl/hellogl2/glwidget.h b/examples/opengl/hellogl2/glwidget.h
index 21dd200dc7..f8526fb7ae 100644
--- a/examples/opengl/hellogl2/glwidget.h
+++ b/examples/opengl/hellogl2/glwidget.h
@@ -65,7 +65,7 @@ class GLWidget : public QOpenGLWidget, protected QOpenGLFunctions
     Q_OBJECT
 
 public:
-    GLWidget(QWidget *parent = 0);
+    GLWidget(QWidget *parent = nullptr);
     ~GLWidget();
 
     static bool isTransparent() { return m_transparent; }
@@ -96,18 +96,18 @@ private:
     void setupVertexAttribs();
 
     bool m_core;
-    int m_xRot;
-    int m_yRot;
-    int m_zRot;
+    int m_xRot = 0;
+    int m_yRot = 0;
+    int m_zRot = 0;
     QPoint m_lastPos;
     Logo m_logo;
     QOpenGLVertexArrayObject m_vao;
     QOpenGLBuffer m_logoVbo;
-    QOpenGLShaderProgram *m_program;
-    int m_projMatrixLoc;
-    int m_mvMatrixLoc;
-    int m_normalMatrixLoc;
-    int m_lightPosLoc;
+    QOpenGLShaderProgram *m_program = nullptr;
+    int m_projMatrixLoc = 0;
+    int m_mvMatrixLoc = 0;
+    int m_normalMatrixLoc = 0;
+    int m_lightPosLoc = 0;
     QMatrix4x4 m_proj;
     QMatrix4x4 m_camera;
     QMatrix4x4 m_world;
diff --git a/examples/opengl/hellogl2/logo.cpp b/examples/opengl/hellogl2/logo.cpp
index a1ec8eaebe..6fcece16d4 100644
--- a/examples/opengl/hellogl2/logo.cpp
+++ b/examples/opengl/hellogl2/logo.cpp
@@ -52,7 +52,6 @@
 #include <qmath.h>
 
 Logo::Logo()
-    : m_count(0)
 {
     m_data.resize(2500 * 6);
 
diff --git a/examples/opengl/hellogl2/logo.h b/examples/opengl/hellogl2/logo.h
index 9e04a57e86..2f3dc7e649 100644
--- a/examples/opengl/hellogl2/logo.h
+++ b/examples/opengl/hellogl2/logo.h
@@ -69,7 +69,7 @@ private:
     void add(const QVector3D &v, const QVector3D &n);
 
     QVector<GLfloat> m_data;
-    int m_count;
+    int m_count = 0;
 };
 
 #endif // LOGO_H
diff --git a/examples/opengl/hellogl2/mainwindow.cpp b/examples/opengl/hellogl2/mainwindow.cpp
index 6bfdee7785..aa20cd678c 100644
--- a/examples/opengl/hellogl2/mainwindow.cpp
+++ b/examples/opengl/hellogl2/mainwindow.cpp
@@ -72,5 +72,6 @@ void MainWindow::onAddNew()
     if (!centralWidget())
         setCentralWidget(new Window(this));
     else
-        QMessageBox::information(0, tr("Cannot add new window"), tr("Already occupied. Undock first."));
+        QMessageBox::information(nullptr, tr("Cannot add new window"),
+                                 tr("Already occupied. Undock first."));
 }
diff --git a/examples/opengl/hellogl2/window.cpp b/examples/opengl/hellogl2/window.cpp
index c3cd10cbfd..5534f2edea 100644
--- a/examples/opengl/hellogl2/window.cpp
+++ b/examples/opengl/hellogl2/window.cpp
@@ -121,7 +121,7 @@ void Window::keyPressEvent(QKeyEvent *e)
 void Window::dockUndock()
 {
     if (parent()) {
-        setParent(0);
+        setParent(nullptr);
         setAttribute(Qt::WA_DeleteOnClose);
         move(QApplication::desktop()->width() / 2 - width() / 2,
              QApplication::desktop()->height() / 2 - height() / 2);
@@ -134,10 +134,12 @@ void Window::dockUndock()
                 dockBtn->setText(tr("Undock"));
                 mainWindow->setCentralWidget(this);
             } else {
-                QMessageBox::information(0, tr("Cannot dock"), tr("Main window already closed"));
+                QMessageBox::information(nullptr, tr("Cannot dock"),
+                                         tr("Main window already closed"));
             }
         } else {
-            QMessageBox::information(0, tr("Cannot dock"), tr("Main window already occupied"));
+            QMessageBox::information(nullptr, tr("Cannot dock"),
+                                     tr("Main window already occupied"));
         }
     }
 }