protected override void UpdateCache(Context ctx)
{
Rectangle rb = Slot + Parent.ClientRectangle.Position;
Context gr = new Context(bmp);
if (!Clipping.IsEmpty)
{
for (int i = 0; i < Clipping.NumRectangles; i++)
{
gr.Rectangle(Clipping.GetRectangle(i));
}
gr.ClipPreserve();
gr.Operator = Operator.Clear;
gr.Fill();
gr.Operator = Operator.Over;
base.onDraw(gr);
if (ClipToClientRect)
{
CairoHelpers.CairoRectangle(gr, ClientRectangle, CornerRadius);
gr.Clip();
}
childrenRWLock.EnterReadLock();
foreach (GraphicObject c in Children)
{
if (!c.Visible)
{
continue;
}
if (Clipping.Contains(c.Slot + ClientRectangle.Position) == RegionOverlap.Out)
{
continue;
}
c.Paint(ref gr);
}
childrenRWLock.ExitReadLock();
#if DEBUG_CLIP_RECTANGLE
Clipping.stroke(gr, Color.Amaranth.AdjustAlpha(0.8));
#endif
}
gr.Dispose();
ctx.SetSourceSurface(bmp, rb.X, rb.Y);
ctx.Paint();
Clipping.Dispose();
Clipping = new Region();
}