buttonpanel.java

Java的面向对象数据库系统的源代码

// You can redistribute this software and/or modify it under the terms of
// the Ozone Library License version 1 published by ozone-db.org.
//
// The original code and portions created by SMB are
// Copyright (C) 1997-@year@ by SMB GmbH. All rights reserved.
//
package org.ozoneDB.adminGui.widget;

import java.awt.Dimension;
import java.awt.GridBagConstraints;
import java.awt.GridBagLayout;
import java.awt.Insets;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import javax.swing.JButton;
import javax.swing.JPanel;
import javax.swing.event.EventListenerList;


//#############################################################################
/**
 * This class creates the button panel that can control up to 4 account defined
 * buttons. Usually used at the bottom of the forms.
 *
 * @author  <p align=center>Ibsen Ramos-Bonilla
 * <br>Copyright &copy 1997-@year@ by SMB GmbH. All Rights Reserved.</p>
 *
 * @version 1.0
 */
//#############################################################################

public class ButtonPanel extends JPanel {

    /** The listener list. */
    protected EventListenerList listenerList = new EventListenerList();


    /**
     * Default constructor not used.
     */
    private ButtonPanel() {
    }

    /**
     * Overloaded constructor creates the panel buttons.
     *
     * @param buttonName - an array of button names.
     */
    public ButtonPanel(String[] buttonName) {
        super();

        //init
        if (buttonName != null)
            init(buttonName);
    }

    /**
     * This method initializes the button panel.
     *
     * @param buttonName - an array of button names.
     */
    private void init(final String[] buttonName) {

        //add buttons
        this.setLayout(new GridBagLayout());

        //create the buttons
        JButton[] button = new JButton[buttonName.length];

        //set buttons
        for (int i = 0; i < buttonName.length; i++) {
            final String name = buttonName[i].toString();
            button[i] = new JButton(name);
            button[i].setPreferredSize(new Dimension(80, 27));
            button[i].setDefaultCapable(true);

            button[i].addActionListener(new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    fireExecute(name);
                }
            });

            this.add(button[i],
                    new GridBagConstraints(i, 0, 1, 1, 0.0, 0.0,
                            GridBagConstraints.CENTER, GridBagConstraints.HORIZONTAL,
                            new Insets(10, 10, 15, 10), 0, 0));
        }
    }

    /**
     * This method allows classes to register for connection events.
     *
     * @param listener - a connection listener.
     */
    public void addConnectionListener(ButtonPanelListener listener) {
        listenerList.add(ButtonPanelListener.class, listener);
    }

    /**
     * This method allows classes to unregister from connection events.
     *
     * @param listener - a connection listener.
     */
    public void removeConnectionListener(ButtonPanelListener listener) {
        listenerList.remove(ButtonPanelListener.class, listener);
    }

    /**
     * This method notifies all when the login process is fired.
     *
     * @param buttonName - the name associated with the button.
     */
    private void fireExecute(String buttonName) {
        Object[] listeners = listenerList.getListenerList();

        //each listener occupies two elements - the first is the listener
        //class, and the second is the listener instance
        for (int i = 0; i < listeners.length; i += 2) {
            if (listeners[i] == ButtonPanelListener.class) {
                ((ButtonPanelListener) listeners[i + 1]).buttonExecute(buttonName);
            }
        }
    }

} //--------------------------------- E O F -----------------------------------