Hi! I want to make image buttons based on Fl_Box and i want to make a press effect when user click on them. In my program there are a lot of screens with images and i need to reduce memory usage, so changing button backgrounds to make this effect is not a good idea. Maybe a right way is to light every point of the image when button is pressed. Is anybody know how to access Fl_Box draw context (its rgb data) before Fl_Box::draw() is called? This operation shouldn't damage the button background, because button should repair its state after a little timeout or after handling appropriate event.
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