OPINION WANTED: Why can't Sun make the setBounds more meaningful?

Question

Hi,
I am wondering why Sun doesn't add some brains to the setBounds method. I bring this up because of my current situation.
I have two panels, A & B. A is added to B, and A can be dragged around "on top" of B. But I can not allow the user to drag A out of the bounds of B. so I have to do all this checking to make sure it doesn't happen. It would be much simpler if the A panel could know what the size of its "playground" is.
Doing something like this would be nice,
A.setPlayground(B.getBounds());then as A is dragged around, it knows what its "playground" is and knows that its own bounds cannot not leave the "playground". But currently, there is no such implementation, so I would basically have to create my own JPanel class, and include this functionality...which I wish Sun would implement.
Anyone else think this is a good idea or worth while to do? Whats your opinion?
Thanks.

Answer 1

Ok, that is basically doing the same as rect.contains(rect) .....and instead of creating new rectangles i could just do this:
if (rectangleA.contains(panelB.getBounds())) ...However, a problem still occurs that a user could drag the panel quickly, and its location gets set so that it is no longer "contained" in rectangleA.
if rectangleA's bounds are [0, 0, 200, 200] the panelB's bounds could get set so that its bounds are [200,y,w,h] ....so u can see the x value is at the max of rectangleA's bounds....so when i try to do rectangleA.contains(panelB.getBounds()) it fails....so to fix this I have to do this:
if ((panelB.getMinX() < 0) ||
                                       (panelB.getMinY() < 0) ||
                                             (panelB.getMaxX() > rectangleA.getMaxX()) ||
                                             (panelB.getMaxY() > rectangleA.getMaxY())) {
                                  temp.setLocation(oldLocation);
                             }i wish i didnt have to do all that checking like that.