Scrollpane scrolling manually to component

Question

Sorry that I am spamming another post that is not a question, but again I was fighting with Swing over something quite poorly documented and I must share my victory for future people that may struggle with the same (and use the forum search).
Situation: a scrolling panel which manually handles scrollwheel scrolling. This will select one of the many JLabels holding icons in the panel, giving them a colored border when the active one.
Requirement: when a label is selected that is out of view, the scrollpane should scroll to make that label visible.
Now after examining the javadocs I realized that scrollRectToVisible() is the solution. This method requires a Rectangle of the position to scroll to, which you can easily get by calling getBounds() on the component (label in my example) that must be visible. So what I did was:
- call scrollToVisibleRect() on the JScrollPane. This does not work, to my surprise
- call scrollToVisibleRect() on the viewport. This works partially, the scrollpane scrolls down, but it will never scroll up
- I also tried validate() here and there just to know for certain I am not crazy
And finally after some more hair pulling and a google quest I stumbled upon the answer; you need to call scrollRectToVisible() on the component that you wrap the scrollpane around, not the scrollpane itself! So if you have something like:
JPanel mypanel = new JPanel();
JScrollPane sp = new JScrollPane(mypanel);You need to call mypanel.scrollRectToVisible() to make the scroll work!
Source of the solution:
http://www.esus.com/docs/GetQuestionPage.jsp?uid=989

Answer 1

Its kind of dumb how they have when that broadcasts when
scrolling is going on but not one directly when its stops.
Thanks for your help.
Heres what i used:
_root.onMouseUp = function () {
if (_xmouse>=0 && _xmouse<=555 &&
_ymouse>537 && _ymouse<558) {
trace('stop that');
}