Martinus Ady H. BloG

/*
 * MDropDownButton.java
 *
 * Created on Jun 25, 2008, 1:41:42 AM
 *
 * Copyright (c) 2008 Martinus Ady H <mrt.itnewbies@gmail.com>.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 *  o Redistributions of source code must retain the above copyright notice,
 *    this list of conditions and the following disclaimer.
 *
 *  o Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 *  o The name of the author may not be used to endorse or promote products
 *    derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */
package id.web.martinusadyh.button;
 
import java.awt.Point;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import javax.swing.Icon;
import javax.swing.JPopupMenu;
import javax.swing.SwingConstants;
import javax.swing.event.PopupMenuEvent;
import javax.swing.event.PopupMenuListener;
 
/** MDropDownButton provide standart button with add feature drop down.
 * @author javamaniac <mrt.itnewbies@gmail.com>
 */
public class MDropDownButton extends javax.swing.JToggleButton
        implements MouseListener {
 
    private javax.swing.JLabel      lblIcon;
    private javax.swing.JLabel      btnLabel;
    private javax.swing.JPopupMenu  popUpMenu;
    private Icon                    disabledIcon;
    private Icon                    enabledIcon;
 
    public MDropDownButton() {
        this(null, null);
    }
 
    public MDropDownButton(javax.swing.JPopupMenu popUpMenu) {
        this(null, null, popUpMenu);
    }
 
    public MDropDownButton(String text, Icon icon) {
        this(text, icon, null);
    }
 
    public MDropDownButton(String text, Icon icon,
            javax.swing.JPopupMenu popUpMenu) {
        super();
        this.popUpMenu = popUpMenu;
 
        initLayout();
        setText(text);
        setIcon(icon);
        setComponentPopupMenu(popUpMenu);
    }
 
    @Override
    public void setDisabledIcon(Icon disabledIcon) {
        this.disabledIcon = disabledIcon;
    }
 
    @Override
    public void setEnabled(boolean enabledState) {
        lblIcon.setEnabled(enabledState);
        btnLabel.setEnabled(enabledState);
        super.setEnabled(enabledState);
    }
 
    @Override
    public boolean isEnabled() {
        return super.isEnabled();
    }
 
    /** Override method setText from parent, this method will put text in JLabel
     * then add to this button via <code>JLabel.setText(newText)</code>.
     * @param text  text for this button */
    @Override
    public void setText(String text) {
        btnLabel.setText(text);
    }
 
    /** Override method setIcon from parent, this method will put Icon in JLabel
     * then add to this button via <code>JLabel.setIcon(newIcon)</code>.
     * @param icon  icon for this button */
    @Override
    public void setIcon(Icon icon) {
        this.enabledIcon = icon;
        btnLabel.setIcon(enabledIcon);
    }
 
    @Override
    public void setComponentPopupMenu(JPopupMenu popup) {
        this.popUpMenu = popup;
    }
 
    /** Method initLayout ini berfungsi untuk mengatur tampilan dari
     * MDropDownButton. MDropDownButton ini menggunakan layout GridBagLayout dan
     * menggunakan 2 buah component JLabel sebagai tampilannya. JLabel pertama
     * digunakan untuk menampilkan text dan icon yang biasa terdapat pada button
     * standart java, sedangkan JLabel yang kedua digunakan untuk menampung icon
     * expand. Tampilan MDropDownButton ini kurang lebih adalah sebagai berikut :
     * <code>
     *  +-----------------+
     *  | (Icon) (Text) V |
     *  +-----------------+
     * </code>
     */
    protected void initLayout() {
        lblIcon     = new javax.swing.JLabel();
        btnLabel    = new javax.swing.JLabel();
 
        lblIcon.setName("lblIcon");
        btnLabel.setName("btnLabel");
        lblIcon.setIcon(new javax.swing.ImageIcon(getClass().getResource("/id/web/martinusadyh/images/popuparrow.gif"))); // NOI18N
 
        //removeAll();
        setLayout(new java.awt.GridBagLayout());
        java.awt.GridBagConstraints gridBagConstraints;
 
        // Set Position for btnLabel
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 0;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.weightx = 1.0;
        gridBagConstraints.insets = new java.awt.Insets(0, 1, 0, 1);
        add(btnLabel, gridBagConstraints);
 
        // Set Position for lblIcon
        gridBagConstraints = new java.awt.GridBagConstraints();
        gridBagConstraints.gridx = 1;
        gridBagConstraints.gridy = 0;
        gridBagConstraints.fill = java.awt.GridBagConstraints.VERTICAL;
        gridBagConstraints.weighty = 1.0;
        add(lblIcon, gridBagConstraints);
 
        setMargin(new java.awt.Insets(2, 0, 2, 0));
 
        setFocusPainted(false);
        setHorizontalAlignment(CENTER);
        lblIcon.addMouseListener(this);
    }
 
    public void mouseClicked(MouseEvent e) {
        if (popUpMenu != null && this.isEnabled()) {
            Point pt = getLocationOnScreen();
            pt.translate(0, getHeight());
            popUpMenu.setLocation(pt);
            popUpMenu.show(this, 0, getHeight());
            setSelected(true);
 
            // Make this button unselected if popUpMenu close
            popUpMenu.addPopupMenuListener(new PopupMenuListener() {
                public void popupMenuWillBecomeInvisible(PopupMenuEvent e) {
                    setSelected(false);
                }
 
                public void popupMenuCanceled(PopupMenuEvent e){}
                public void popupMenuWillBecomeVisible(PopupMenuEvent e){}
            });
        }
    }
 
    public void mousePressed(MouseEvent e) { }
    public void mouseReleased(MouseEvent e) { }
    public void mouseEntered(MouseEvent e) { }
    public void mouseExited(MouseEvent e) { }
}
}