催月�?Jaclick) — Sun, 07 Mar 2010 04:42:00 GMT

Image囄��资源获取及释攑ַ��L��Q�eclipse开发避免不了��用大量的囄��资源�Q?font face="Tahoma">CacheImage可以帮我们完成这��工作，使用��h��相当方便�?br />

import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import org.eclipse.swt.graphics.Image;
import org.eclipse.ui.plugin.AbstractUIPlugin;

public class CacheImage {
private final Map < String, Image > imageMap = new HashMap < String, Image > ();

private static CacheImage INSTANCE;

private CacheImage() {
}

// 单例模式�Q�获得CacheImage实例
public static CacheImage getINSTANCE() {
   if (INSTANCE == null )
   INSTANCE = new CacheImage();
   return INSTANCE;
}

// 获得囑փ�
public Image getImage(String applicationID,String imageName) {
   if (imageName == null )
    return null ;
  Image image = (Image) imageMap.get(imageName);
   if (image == null ) {
   image = AbstractUIPlugin.imageDescriptorFromPlugin(
     applicationID,imageName).createImage();
   imageMap.put(imageName, image);
  }
   return image;
}

// 释放囑փ�资源
public void dispose() {
  Iterator iterator = imageMap.values().iterator();
   while (iterator.hasNext())
   ((Image) iterator.next()).dispose();
  imageMap.clear();
}
}

�H�口居中工具�c?br />

import org.eclipse.swt.graphics.Rectangle;
import org.eclipse.swt.widgets.Display;
import org.eclipse.swt.widgets.Shell;

public class CenterUtil {
     public static void centerShell(Display display,Shell shell) {
         Rectangle displayBounds = display.getPrimaryMonitor().getBounds();
         Rectangle shellBounds = shell.getBounds();
          int x = displayBounds.x + (displayBounds.width - shellBounds.width) >> 1 ;
          int y = displayBounds.y + (displayBounds.height - shellBounds.height) >> 1 ;
         shell.setLocation(x, y);
     }
}

催月�?Jaclick) 2010-03-07 12:42 发表评论

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