timeline hierarchical length signalling

2019-10-07 02:33:52 +11:00
parent f34eb0dfb6
commit 31f11cd87d
17 changed files with 215 additions and 188 deletions
@@ -39,6 +39,11 @@ void TimelineView::ZoomTool::MouseRelease(QMouseEvent *event)
 {
  double scale = parent()->scale_;

+  QPointF center_location = parent()->mapToScene(event->pos());
+
+  // Normalize zoom location for 1.0 scale
+  double scaled_x = center_location.x() / scale;
+
  if (event->modifiers() & Qt::AltModifier) {
    // Zoom out if the user clicks while holding Alt
    scale *= 0.5;
@@ -49,4 +54,10 @@ void TimelineView::ZoomTool::MouseRelease(QMouseEvent *event)

  parent()->SetScale(scale);
  emit parent()->ScaleChanged(scale);
+
+  // Adjust zoom location for new scale
+  scaled_x *= scale;
+  center_location.setX(scaled_x);
+
+  parent()->centerOn(center_location);
 }