// event consumers:
protected virtual void HandleBoundsChange(BoundsChange evt)
{
var moved = !evt.Bounds.SamePosition (evt.OldBounds);
// if we moved, cause our parent to draw exposed region
if (moved && Parent != null) {
List<BoundingRect> dirtyRects;
evt.OldBounds.SplitIntersection (evt.Bounds, out dirtyRects);
dirtyRects.ForEach (Parent.Render);
}
// we might need to rerender the whole thing on bounds change...
// even if we didn't move, scaling could have affected our whole content.
if (moved || ScaleX != 1 || ScaleY != 1)
Render ();
}
public BoundsChange UpdateBounds(double X, double Y, double Width, double Height)
{
var old = Clone ();
x = X;
y = Y;
width = Width;
height = Height;
var evt = new BoundsChange (old, this);
Change.Fire (evt);
return evt;
}