canvas being actually displayed. It simply try to render everything. Is my guess right? Can anyone confirm please? Is there a way to turn this on?
In the original implementation whenever a shape was draw, all child shapes were clipped according to the bounds of the parent shape. So the root shape clipped to the bounds of the window. You could test before drawing if the shape is visible at all, however in my experience you do not gain any speed because the graphic engine is much faster at performing such tests. At some points I also experimented with R- and Generalized Search Trees, but I figured out that in most cases it is not worth the troubles. For Mondrian visualization the whole dataset is normally displayed anyway. These kind of trees only bring speed improvement, if typically only a fraction of a huge amount of data is visible, like this is the case in a game world or a CAD application. Cheers, Lukas -- Lukas Renggli http://www.lukas-renggli.ch