I have JFrame
with GridBagLayout
. User can resize this window. Also, he can perform some editing actions that change window size. I use pack(); repaint();
now after such actions. But, actually I shouldn't make window smaller after such operations - only bigger. What I found as solution is
Dimension oldSize = getSize();
pack();
Dimension newSize = window.getSize();
setSize(
(int) Math.max(newSize.getWidth(), oldSize.getWidth()),
(int) Math.max(newSize.getHeight(), oldSize.getHeight()));
repaint();
But I don't like this solution at all. Beside ugly code, we set size twice (once by pack and than directly). Is there any other solutions?
A simple solution would be to use something like this:
frame.setMinimumSize(frame.getSize());
frame.pack();
frame.setMinimumSize(null);
This will not allow pack()
to make the window smaller, only bigger, I think.
By resetting the minimum size to null
after the pack()
we avoid preventing the user on resizing it smaller afterwards.
You should not need a repaint()
at the end, the size changing should trigger a repaint by itself. (Of course, make sure that all these actions happen in the event dispatch thread.)