JFrame resize control

[babis]

Hi
I want to have a control over the user resize in a JFrame. For example i want width will always 300 pixel higher than height. I try this code :

public class Test extends JFrame
{

	private static final long serialVersionUID = 1L;
	private JPanel jContentPane = null;
	private static int con = 300;

	/**
	 * This is the default constructor
	 */
	public Test()
	{
		super();
		initialize();
	}

	/**
	 * This method initializes this
	 * 
	 * @return void
	 */
	private void initialize()
	{
		this.setSize(500, 200);
		this.setContentPane(getJContentPane());
		this.setTitle("Test");
		
		this.addComponentListener(new ComponentAdapter()
		{
			public void componentResized(ComponentEvent e)
			{
				resizeControl();
			}
		});

		this.setVisible(true);
	}

	/**
	 * This method initializes jContentPane
	 * 
	 * @return javax.swing.JPanel
	 */
	private JPanel getJContentPane()
	{
		if (jContentPane == null)
		{
			jContentPane = new JPanel();
			jContentPane.setLayout(new BorderLayout());
		}
		return jContentPane;
	}

	
	protected void resizeControl()
	{
		int w = this.getWidth();
		int h = this.getHeight();
		if(w > h+con)
		{
			this.setSize(h+300, h);
		}else
		{
			this.setSize(w, w-con);
		}
	}
}

This code is not doing resize until the user did some other action, like moving the JFrame. Is any solution to this?

Thank you in advance
Charalampos Alexopoulos

[JosAH]

What happens when you override the setBounds( ... ) methods and call the super implementation with (optionally) adjusted values?

kind regards,

Jos

[DarrylBurke]

This code is not doing resize until the user did some other action, like moving the JFrame. Is any solution to this?

Your code works fine for me. It does not allow increasing teh size of the JFrame except by dragging the corner (ie increasing width and height simultaneously). When reducing either width or height, the other gets reduced correspondingly.

db

[Bulelakes]

use the "setBounds(.....)" method it will work.