Shadow Popup Border : GUI Utilities « Swing JFC « Java






Shadow Popup Border

   
/*
 * Copyright (c) 2001-2009 JGoodies Karsten Lentzsch. 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 Neither the name of JGoodies Karsten Lentzsch nor the names of
 *    its contributors may 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.
 */


import java.awt.Component;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Insets;

import javax.swing.ImageIcon;
import javax.swing.JComponent;
import javax.swing.border.AbstractBorder;

/**
 * A border with a drop shadow intended to be used as the outer border
 * of popups. Can paint the screen background if used with heavy-weight
 * popup windows.
 *
 * @author Karsten Lentzsch
 * @author Andrej Golovnin
 * @version $Revision: 1.6 $
 *
 * @see ShadowPopup
 * @see ShadowPopupFactory
 */
final class ShadowPopupBorder extends AbstractBorder {

    /**
     * The drop shadow needs 5 pixels at the bottom and the right hand side.
     */
    private static final int SHADOW_SIZE = 5;

  /**
   * The singleton instance used to draw all borders.
   */
  private static ShadowPopupBorder instance = new ShadowPopupBorder();

  /**
   * The drop shadow is created from a PNG image with 8 bit alpha channel.
   */
  private static Image shadow
    = new ImageIcon(ShadowPopupBorder.class.getResource("shadow.png")).getImage();


    // Instance Creation *****************************************************

  /**
   * Returns the singleton instance used to draw all borders.
   */
  public static ShadowPopupBorder getInstance() {
    return instance;
  }


  /**
   * Paints the border for the specified component with the specified
     * position and size.
   */
  public void paintBorder(Component c, Graphics g, int x, int y, int width, int height) {

    // draw drop shadow
    g.drawImage(shadow, x +  5, y + height - 5, x + 10, y + height, 0, 6, 5, 11, null, c);
    g.drawImage(shadow, x + 10, y + height - 5, x + width - 5, y + height, 5, 6, 6, 11, null, c);
    g.drawImage(shadow, x + width - 5, y + 5, x + width, y + 10, 6, 0, 11, 5, null, c);
    g.drawImage(shadow, x + width - 5, y + 10, x + width, y + height - 5, 6, 5, 11, 6, null, c);
    g.drawImage(shadow, x + width - 5, y + height - 5, x + width, y + height, 6, 6, 11, 11, null, c);
  }


  /**
   * Returns the insets of the border.
   */
  public Insets getBorderInsets(Component c) {
    return new Insets(0, 0, SHADOW_SIZE, SHADOW_SIZE);
  }


    /**
     * Reinitializes the insets parameter with this Border's current Insets.
     * @param c the component for which this border insets value applies
     * @param insets the object to be reinitialized
     * @return the <code>insets</code> object
     */
    public Insets getBorderInsets(Component c, Insets insets) {
        insets.left = insets.top = 0;
        insets.right = insets.bottom = SHADOW_SIZE;
        return insets;
    }

}

   
    
    
  








Related examples in the same category

1.Utilities for GUI work.
2.A utility class to tune the Metal look and feel.
3.Renders a component into an image
4.Positions the specified dialog at a position relative to its parent.
5.Computes the maximum bounds of the current screen device. If this method is called on JDK 1.4, Xinerama-aware results are returned.
6.Computes the center point of the current screen device.
7.Positions the specified frame at a relative position in the screen, where 50% is considered to be the center of the screen.
8.Positions the specified frame in the middle of the screen.
9.Positions the specified frame at a random location on the screen while ensuring that the
10.AWT Utilities
11.Center On Screen
12.Center Within Parent
13.Center window
14.Calculates preferred max height for the given components without checking isVisible
15.Calculates preferred max width for the given components without checking isVisible
16.Is Focusable
17.Loading the given image
18.Press a key pragmatically
19.Set All Opaque
20.Set Frame Location Relative To
21.Set Wait Cursor
22.Unit conversions
23.Unit measure
24.Get Point For Centering
25.Get Point For Staggering