Suppose that after the following code I have changed the values of a,b,c,d and I want to see the appropriate change in the view. How can I perform this task ? Thanks !
JTable table =new JTable(3, 5);
JPanel panel =new JPanel(new GridBagLayout());
GridBagConstraints c =new GridBagConstraints();
int a = 1, b = 2, c = 3, d = 4;
c.gridx = 2;
c.gridy = 3;
c.insets =new Insets(a, b, c, d);
panel.add(table, c);
the problem is, that the layout makes a clone of the constraints, so changing the constraints makes no sense. but you can get them by calling GridBagLayout.getConstraints(Component comp)
, then change the constraints (or just create new ones), then call again setConstraints with the new constraints
BTW you shouldn't name your local constraints c AND a local int c... just for reference.
Al-Cepi is right.. set the constraints using setConstraints then call revalidate() if everything doesn't snap into place like it should. And like I said before.. if your screen isn't updating its display according to you, then call repaint() and see if that helps any.
GridBagLayout is evil. I always suggest trying to figure out a way to use one of many other layout managers.
http://java.sun.com/docs/books/tutorial/uiswing/layout/using.html
Good Luck.
-Js