kern/src/de/memtext/dlg/OkCancelClearDlg.java

package de.memtext.dlg;

import java.awt.Frame;
import java.awt.HeadlessException;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;

/**
 * Abstract Dialog in which OK or Cancel can be clicked.
 * Subclasses must implement performCancel and performOk.
 * setCenter for convenience.
 *
 It's important that clients don't call
 getContentPane().setLayout(new BorderLayout()) or something like that,
 because that will cause southPanel to disappear
 */
public abstract class OkCancelClearDlg extends OkCancelDlg {
    private boolean wasClearSelected;

    protected JButton btnClear = new JButton("Leeren");

    /**
     * Constructor for OkCancelClearDlg.
     * @param arg0
     * @param arg1
     * @throws HeadlessException
     */
    public OkCancelClearDlg(Frame arg0, String title) throws HeadlessException {
        super(arg0, title, true);
        initOkCancelClearDlg();
    }

    private void initOkCancelClearDlg() {

        btnClear.setActionCommand("Clear");
        btnClear.addActionListener(new ActionListener() {
           
            @Override
            public void actionPerformed(ActionEvent ae) {
                wasOkSelected = false;
                wasClearSelected = true;
                performClear();
            }
        });
        addAfterCancel(btnClear);
    }

    public boolean wasClearSelected() {
        return wasClearSelected;
    }

    protected abstract void performClear();

    public static void main(String[] args) {

        OkCancelClearDlg dlg = new OkCancelClearDlg(new JFrame(), "test") {
            
            @Override
            protected void performOk() {
            }

            @Override
            protected void performCancel() {
            }
            
            @Override
            protected void performClear() {
            }
        };

        //		dlg.addAboveOK(new JLabel("bla"));
        dlg.setCenter(new JLabel("cnter"));
        dlg.pack();
        dlg.show();
    }
}