diamonditem.java

J2ME of HighUI_Example like AlertSplashScreenMIDlet and AlertWithIndicatorAndThreadMIDlet and Cho

/* License
 * 
 * Copyright 1994-2004 Sun Microsystems, Inc. All Rights Reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *  
 *  * Redistribution of source code must retain the above copyright notice,
 *      this list of conditions and the following disclaimer.
 * 
 *  * Redistribution 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.
 * 
 * Neither the name of Sun Microsystems, Inc. or the names of contributors
 * may be used to endorse or promote products derived from this software
 * without specific prior written permission.
 *  
 * This software is provided "AS IS," without a warranty of any kind. ALL
 * EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
 * ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
 * OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN")
 * AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
 * AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
 * DERIVATIVES. IN NO EVENT WILL SUN OR ITS LICENSORS BE LIABLE FOR ANY LOST
 * REVENUE, PROFIT OR DATA, OR FOR DIRECT, INDIRECT, SPECIAL, CONSEQUENTIAL,
 * INCIDENTAL OR PUNITIVE DAMAGES, HOWEVER CAUSED AND REGARDLESS OF THE THEORY
 * OF LIABILITY, ARISING OUT OF THE USE OF OR INABILITY TO USE THIS SOFTWARE,
 * EVEN IF SUN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
 *  
 * You acknowledge that this software is not designed, licensed or intended
 * for use in the design, construction, operation or maintenance of any
 * nuclear facility. 
 */

import javax.microedition.lcdui.*;

public class DiamondItem
    extends CustomItem {
  private boolean mState;
  
  public DiamondItem(String title) {
    super(title);
    mState = false;
  }
  
  public void toggle() {
    mState = !mState;
    repaint();
  }
  
  // CustomItem abstract methods.
  
  public int getMinContentWidth() { return 80; }
  public int getMinContentHeight() { return 40; }
  
  public int getPrefContentWidth(int width) {
    return getMinContentWidth();
  }
  
  public int getPrefContentHeight(int height) {
    return getMinContentHeight();
  }
  
  public void paint(Graphics g, int w, int h) {
    g.drawRect(0, 0, w - 1, h - 1);
    int stepx = 8, stepy = 16;
    for (int y = 0; y < h; y += stepy) {
      for (int x = 0; x < w; x += stepx) {
        g.drawLine(x, y, x + stepx, y + stepy);
        g.drawLine(x, y + stepy, x + stepx, y);
        if (mState == true) {
          int midx = x + stepx / 2;
          int midy = y + stepy / 2;
          g.fillTriangle(x, y, x + stepx, y, midx, midy);
          g.fillTriangle(midx, midy, x, y + stepy,
              x + stepx, y + stepy);
        }
      }
    }
  }
  
  // CustomItem methods.
  
  protected void keyPressed(int keyCode) { toggle(); }
  
  protected void pointerPressed(int x, int y) { toggle(); }
}