How to anchor grid in GridBagLayout

Question

Hi,
I've created a JFrame with a GridBagLayout.
I've placed a button in it.
Here's the constructor:
     public GridBagLayoutFrame() {
          super();
          getContentPane().setLayout(new GridBagLayout());
          setBounds(100, 100, 500, 375);
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          final JButton button = new JButton();
          button.setText("New JButton");
          GridBagConstraints gridBagConstraints = new GridBagConstraints();
          gridBagConstraints.anchor=GridBagConstraints.FIRST_LINE_START;
          gridBagConstraints.gridy = 0;
          gridBagConstraints.gridx = 0;
          getContentPane().add(button, gridBagConstraints);
     }          However, the button appears in the center and I would like it to appear in the top left corner.
I have tried setting the anchor property of GridBagConstraints to GridBagConstraints.FIRST_LINE_START
but I suppose this controls the anchoring of the button in the cell not the anchoring of the grid itself.
How can I make the grid anchor to the top left corner of the pane?
Thanks very much.

Answer 1

The grid will always take up the whole of the container it lays out. Your problem is that by default, the cell is only as big as the component it contains. To change that, set weightx and/or weighty to non-zero values.
Edited by: da.futt on 17-Jun-2009 14:19