How to force TeeChart gallery repaint?(swing)

Question

When I switch to/from 3D mode in graphics gallery, old version is still visible, it's removed only if I resize gallery(it's child of JDialog class)

Here is demo:

Tried lots of methods - all these repaint, revalidate, refresh... etc, they don't work :(

So how can I force it to redraw like when it's resized? (I am rewriting code of teechart in my local version )

Answer 1

Another customer reported the same some time ago here .
As you can see, I've just fixed it so the next maintenance release will included that.