Setting transperancy on stack while doing mouse hover

I am trying to make the behavior that the stacks on stack bar chart become opaque and be more transparent while doing mouse hover. Right now the default behavior is opposite. I am able to get the colors as opaque without mouse hover by setting the alpha to 1.0. However the opaqueness remains at 1.0 while hovering. Is there a way to set the transparency of color while doing mouse hover.

tha开发者_Go百科nks in advance

have you looked at using an Effect? Ideally openflashchart supports them, but i am not familiar with that lib. But using an Effect is how i would probably do it for a standard control.