private void markTreeDirtyHelper(Visual v)
{
//now walk down and mark all UIElements dirty
if (v != null)
{
if (v.CheckFlagsAnd(VisualFlags.IsUIElement))
{
UIElement uie = ((UIElement)v);
uie.InvalidateMeasureInternal();
uie.InvalidateArrangeInternal();
}
//walk children doing the same, don't stop if they are already dirty since there can
//be insulated dirty islands below
int cnt = v.InternalVisualChildrenCount;
for (int i = 0; i < cnt; i++)
{
Visual child = v.InternalGetVisualChild(i);
if (child != null)
{
markTreeDirtyHelper(child);
}
}
}
}
internal override void invalidate(UIElement e)
{
e.InvalidateArrangeInternal();
}
internal override void invalidate(UIElement e)
{
e.InvalidateArrangeInternal();
}