GUI with two panels, one of them a GridBagLayout

[Fernando Sanz]

Hi there,
I want to have a GUI with two panels: northPanel and southPanel.
And I want the northPanle to be a GridBagLayout. But, I don't know how to add the components to it; only when it's the Frame itself that is set to GridBagLayout.
Anyone has any similar example?
Thanks

[Ernest Friedman-Hill]

Hi,
Just create a JPanel "northPanel", call
northPanel.setLayout(new GridBagLayout());
and then call
northPanel.add(new Whatever())
using a GridBagConstraints object as needed. When you're done, you can just use
myFrame.getContentPane().add(northPanel, BorderLayout.NORTH);
Does this answer your question?
[ September 01, 2003: Message edited by: Ernest Friedman-Hill ]

[Fernando Sanz]

I'm not sure if I understand you, this is what I was trying more or less:

GridBagConstraints constraints = new GridBagConstraints() ;
GridBagLayout gbLayout = new GridBagLayout() ;
Panel northPanel = new Panel() ;
..........
..........
northPanel.setLayout(gbLayout) ;
..........
..........
addComponent( browseButton, 0,0,1,1 ) ;
..........
..........
..........
..........
private void addComponent( Component component, int row, int column,
int width, int height )
{
// set gridx and gridy
constraints.gridx = column ;
constraints.gridy = row ;
// set gridwidth and gridheight
constraints.gridwidth = width ;
constraints.gridheight = height ;
layout.setConstraints( component, constraints ) ;
add( component ) ;
}
***************************************
In your example, how would you add browseButton to the northPanel?
Thanks

[Fernando Sanz]

OK, I think I understood you now.
I changed the
private void addComponent(....)
to
private Component addComponent( ... )
and then
northFrame.add(addComponent( browseButton, 0,0,1,1 )) ;
Thanks!

[Ernest Friedman-Hill]

Your addComponent() method implicitly calls add() on (what I imagine is) your JFrame object -- i.e., an object of the class that all this code is defined in. You could change addComponent() to take another argument, the container to add the component to; then instead of calling just add(), you'd call container.add() -- i.e.,

addComponent(northPanel, browseButton, 0, 0, 1, 1);
...
private void addComponent( Container container, Component component,
                           int row, int column, int width, int height ) {
 ...
 container.add(component);
}

[Fernando Sanz]

Originally posted by Ernest Friedman-Hill:
Your addComponent() method implicitly calls add() on (what I imagine is) your JFrame object -- i.e., an object of the class that all this code is defined in. You could change addComponent() to take another argument, the container to add the component to; then instead of calling just add(), you'd call container.add() -- i.e.,

addComponent(northPanel, browseButton, 0, 0, 1, 1);
...
private void addComponent( Container container, Component component,
                           int row, int column, int width, int height ) {
 ...
 container.add(component);
}

Thanks a lot, much better than my solution