protected override bool OnDrawn(Cairo.Context cr)
{
if (image.IsNull)
return true;
var a = Allocation;
// HACK: Gtk sends sometimes an expose/draw event while the widget reallocates.
// In that case we would draw in the wrong area, which may lead to artifacts
// if no other widget updates it. Alternative: we could clip the
// allocation bounds, but this may have other issues.
if (a.Width == 1 && a.Height == 1 && a.X == -1 && a.Y == -1) // the allocation coordinates on reallocation
return base.OnDrawn (cr);
int x = (int)(((float)a.Width - (float)image.Size.Width) * xalign);
int y = (int)(((float)a.Height - (float)image.Size.Height) * yalign);
if (x < 0) x = 0;
if (y < 0) y = 0;
((GtkImage)image.Backend).Draw (actx, cr, Util.GetScaleFactor (this), x, y, image);
return base.OnDrawn (cr);
}
