QmlProfiler: Centralize redrawing of custom canvas

Don't handle redraw events in QML anymore and instead trigger a redraw
on geometryChange as well as componentComplete from C++. This reduces
redundant code and glitches from forgotten QML event handlers.

Change-Id: I0eadfb54cf8e392152c4d91b83c874b37b1aca96
Reviewed-by: Kai Koehne <kai.koehne@digia.com>

src/plugins/qmlprofiler/canvas/qmlprofilercanvas.cpp

@@ -92,6 +92,13 @@ void QmlProfilerCanvas::componentComplete()
             QMetaObject::connect(this, p.notifySignalIndex(), this, requestPaintMethod, 0, 0);
     }
     QQuickItem::componentComplete();
+    requestRedraw();
+}
+
+void QmlProfilerCanvas::geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry)
+{
+    QQuickItem::geometryChanged(newGeometry, oldGeometry);
+    requestRedraw();
 }
 
 }

src/plugins/qmlprofiler/canvas/qmlprofilercanvas.h

@@ -61,6 +61,7 @@ private slots:
 protected:
     virtual void paint(QPainter *);
     virtual void componentComplete();
+    virtual void geometryChanged(const QRectF &newGeometry, const QRectF &oldGeometry);
 
 private:
     Context2D *m_context2d;

src/plugins/qmlprofiler/qml/TimeDisplay.qml

@@ -38,17 +38,6 @@ Canvas2D {
     property real endTime : 0
     property real timePerPixel: 0
 
-
-    Component.onCompleted: {
-        requestRedraw();
-    }
-    onWidthChanged: {
-        requestRedraw();
-    }
-    onHeightChanged: {
-        requestRedraw();
-    }
-
     Connections {
         target: zoomControl
         onRangeChanged: {

src/plugins/qmlprofiler/qml/TimeMarks.qml

@@ -38,21 +38,6 @@ Canvas2D {
     property real endTime
     property real timePerPixel
 
-    Component.onCompleted: {
-        requestRedraw();
-    }
-
-    onWidthChanged: {
-        requestRedraw();
-    }
-    onHeightChanged: {
-        requestRedraw();
-    }
-
-    onYChanged: {
-        requestRedraw();
-    }
-
     Connections {
         target: labels
         onHeightChanged: { requestRedraw(); }