public override sealed void SetViewport(int viewportLeft, int viewportTop)
{
int diffLeft = viewportLeft - _viewportLeft;
int diffTop = viewportTop - _viewportTop;
if (diffLeft != 0 || diffTop != 0)
{
_viewportLeft = viewportLeft;
_viewportTop = viewportTop;
//
if (!this.BlockGraphicUpdateBubble)
{
InvalidateGfxArgs args = BubbleInvalidater.GetInvalidateGfxArgs();
args.SetReason_ChangeViewport(this, diffLeft, diffTop);
this.InvalidateGraphics(args);
}
}
}
//--- protected static InvalidateGfxArgs GetInvalidateGfxArgs() => BubbleInvalidater.GetInvalidateGfxArgs();
