Make it possible to pause the animation

msorvig · Feb 13, 2018 · b9b5048 · b9b5048
1 parent 8f027d1
commit b9b5048
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Showing 2 changed files with 14 additions and 1 deletion.
diff --git a/gui_opengl/hellowindow.cpp b/gui_opengl/hellowindow.cpp
@@ -47,6 +47,7 @@
 HelloWindow::HelloWindow()
     : QOpenGLWindow(QOpenGLWindow::NoPartialUpdate)
     , m_colorIndex(0)
+    , m_animating(true)
 {
 
     QSurfaceFormat format;
@@ -63,6 +64,15 @@ void HelloWindow::mousePressEvent(QMouseEvent *)
     updateColor();
 }
 
+void HelloWindow::keyPressEvent(QKeyEvent* event)
+{
+    if (event->key() == Qt::Key_Space) {
+        m_animating = !m_animating;
+        if (m_animating)
+            requestUpdate();
+    }
+}
+
 void HelloWindow::updateColor()
 {
     QColor colors[] =
@@ -152,7 +162,8 @@ void HelloWindow::paintGL()
 
     // qDebug() << "HelloWindow::render 3 start timer";
 
-    requestUpdate();
+    if (m_animating)
+        requestUpdate();
 }
 
 void HelloWindow::paintQtLogo()

diff --git a/gui_opengl/hellowindow.h b/gui_opengl/hellowindow.h
@@ -55,9 +55,11 @@ class HelloWindow : public QOpenGLWindow
     void paintGL() override;
 
     void mousePressEvent(QMouseEvent *) override;
+    void keyPressEvent(QKeyEvent* event) override;
 
     int m_colorIndex;
     QColor m_color;
+    bool m_animating;
 
     void paintQtLogo();
     void createGeometry();