public void PreInvalidate(Region invalidateRegion)
{
if (InvalidateRegion == null)
{
return;
}
RemoveOverlapsFromRegion(invalidateRegion, false);
InvalidateRegion.Union(invalidateRegion);
}
public void Invalidate(Region invalidateRegion)
{
if (InvalidateRegion == null)
{
return;
}
RemoveOverlapsFromRegion(invalidateRegion, false);
InvalidateRegion.Union(invalidateRegion);
if (InvalidateDisabled <= 0)
{
InvalidateIfNeeded();
}
}
private void InvalidateIfNeeded()
{
if (m_Parent != null)
{
m_Parent.InvalidateIfNeeded();
return;
}
if (InvalidateRegion == null)
{
return; //not assigned to Parent
}
if (OnInvalidate != null)
{
if (InvalidateRegion.IsVisible(Rect))
{
InvalidateRegion.Intersect(Rect);
OnInvalidate(InvalidateRegion);
}
}
InvalidateRegion.MakeEmpty();
}
