Question

I have a JScrollPane containing a JPanel. I fill this JPanel with many buttons.

Is there any possibility to get the currently shown buttons?

I know I can access the children of a JPanel via jpanel.getComponents() but those are all components in this pane; I want only the ones that are currently on screen.

Answer 1

I assume that this container is already visible on the screen, then I suggest

1) to extract JViewPort from JScrollPane,

2) addChangeListener to JViewPort

3) each visible JComponent(s) returns Rectangle

4) and Rectangle#intersects returns Boolean value if is JComponent(s) visible or not in JViewPort