Fix qmloscilloscope example when using software backend

The example incorrectly showed OpenGL to be in use even when
Qt was configured with -no-opengl.

Change-Id: I22905f7d41fe8e4b04fc1c3473b9924b8c82b06c
Reviewed-by: Mika Salmela <mika.salmela@qt.io>
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>

2 files changed, 18 insertions, 2 deletions

diff --git a/examples/charts/qmloscilloscope/qml/qmloscilloscope/ScopeView.qml b/examples/charts/qmloscilloscope/qml/qmloscilloscope/ScopeView.qml
index b393b9ff..9eb9f9af 100644
--- a/examples/charts/qmloscilloscope/qml/qmloscilloscope/ScopeView.qml
+++ b/examples/charts/qmloscilloscope/qml/qmloscilloscope/ScopeView.qml
@@ -36,9 +36,18 @@ ChartView {
     animationOptions: ChartView.NoAnimation
     theme: ChartView.ChartThemeDark
     property bool openGL: true
+    property bool openGLSupported: true
     onOpenGLChanged: {
-        series("signal 1").useOpenGL = openGL;
-        series("signal 2").useOpenGL = openGL;
+        if (openGLSupported) {
+            series("signal 1").useOpenGL = openGL;
+            series("signal 2").useOpenGL = openGL;
+        }
+    }
+    Component.onCompleted: {
+        if (!series("signal 1").useOpenGL) {
+            openGLSupported = false
+            openGL = false
+        }
     }
 
     ValueAxis {
diff --git a/examples/charts/qmloscilloscope/qml/qmloscilloscope/main.qml b/examples/charts/qmloscilloscope/qml/qmloscilloscope/main.qml
index a8260564..3479c523 100644
--- a/examples/charts/qmloscilloscope/qml/qmloscilloscope/main.qml
+++ b/examples/charts/qmloscilloscope/qml/qmloscilloscope/main.qml
@@ -67,6 +67,13 @@ Item {
         anchors.right: parent.right
         anchors.left: controlPanel.right
         height: main.height
+
+        onOpenGLSupportedChanged: {
+            if (!openGLSupported) {
+                controlPanel.openGLButton.enabled = false
+                controlPanel.openGLButton.currentSelection = 0
+            }
+        }
     }
 //![2]