Timeline ruler and scaling enhancements

- Make timeline scaling smoother and allow further scale values.
- Implement non linear scaling strategy which improve UX.
- Double clicking the scale head resets the scale to the default value
- Optimize drawing by only drawing the visible part of the ruler.
- Other assorted small tweaks

Change-Id: I5fbf729f3b5e098a60e26978af6bc82bb5f307ae
Reviewed-by: Miikka Heikkinen <miikka.heikkinen@qt.io>

1 files changed, 4 insertions, 4 deletions

diff --git a/src/Authoring/Qt3DStudio/Palettes/TimelineGraphicsView/ui/Ruler.h b/src/Authoring/Qt3DStudio/Palettes/TimelineGraphicsView/ui/Ruler.h
index 005a23c3..355d3447 100644
--- a/src/Authoring/Qt3DStudio/Palettes/TimelineGraphicsView/ui/Ruler.h
+++ b/src/Authoring/Qt3DStudio/Palettes/TimelineGraphicsView/ui/Ruler.h
@@ -41,7 +41,7 @@ signals:
 public:
     explicit Ruler(TimelineItem *parent = nullptr);
 
-    void setTimelineScale(double scl);
+    void setTimelineScale(int scl);
     long distanceToTime(double distance) const;
     double timeToDistance(long time) const;
     double timelineScale() const;
@@ -59,12 +59,12 @@ protected:
 
 signals:
     void maxDurationChanged(long maxDuration);
-    void durationChanged(long duration);
     void viewportXChanged(int viewportX);
 
 private:
-    const QString timestampString(int timeMs);
-    double m_timeScale = 2;
+    const QString formatTime(double seconds);
+
+    double m_timeScale = 1.;
     long m_duration = 0; // milliseconds
     long m_maxDuration = 0; // milliseconds
     int m_viewportX = 0;