import?java.awt.*;
import?java.awt.event.*;

public?class?BackingStore?extends?ComponentAdapter?{
	ComponentListener?	componentListener;
	Image?				offscreen;
	Component?			component;
	Dimension			size;

	public?BackingStore（Component?component）?{
		setComponent（component）;
	}
	public?void?setComponent（Component?c）?{
		if（component?!=?null）?{
			component.removeComponentListener（this）;
		}
		component?=?c;
		component.addComponentListener（this）;
	}
	public?Component?getComponent（）?{
		return?component;
	}
	public?Image?getImage（）?{?
		if（offscreen?==?null）
			createBuffers（）;

		return?offscreen;
	}
	public?Graphics?getGraphics（）?{?
		if（offscreen?==?null）
			createBuffers（）;

		return?offscreen.getGraphics（）;?
	}
	public?void?componentResized（ComponentEvent?event）?{
		if（needNewOffscreenBuffer（））
			createBuffers（）;
	}
	public?void?blitTo（Image?im）?{
		blitTo（im?null）;
	}
	public?void?blitTo（Graphics?graphics）?{
		blitTo（graphics?null）;
	}
	public?void?blitTo（Image?im?Rectangle?clip）?{
		Graphics?g?=?im.getGraphics（）;
		if（g?!=?null）?{
			try?{
				if（clip?!=?null）
					g.setClip（clip）;

				g.drawImage（offscreen?0?0?component）;
			}
			finally?{
				g.dispose（）;
			}
		}
	}
	public?void?blitTo（Graphics?g?Rectangle?clip）?{
		if（g?!=?null）?{
			if（clip?!=?null）
				g.setClip（clip）;

			g.drawImage（offscreen?0?0?component）;
		}
	}
?	private?boolean?needNewOffscreenBuffer（）?{
		Dimension?newSize?=?component.getSize（）;

???		return?（offscreen?==?null?||
???				newSize.width??>?size.width?||
???				newSize.height?>?size.height）;
???	}
???	private?void?createBuffers（）?{
		size		=?component.getSize（）;
???		offscreen?	=?component.createImage（size.width?
											size.height）;
???	}
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??1998-08-14?10:36??Source?Code\
?????目錄???????????0??1998-08-14?10:29??Source?Code\partFive\
?????目錄???????????0??1998-08-14?10:28??Source?Code\partFive\animation\
?????文件????????2742??1998-08-14?10:28??Source?Code\partFive\animation\BackingStore.class
?????文件????????1798??1998-08-14?10:28??Source?Code\partFive\animation\BackingStore.java
?????文件????????3626??1998-08-14?10:28??Source?Code\partFive\animation\BulletinLayout.class
?????文件????????4225??1998-08-14?10:28??Source?Code\partFive\animation\BulletinLayout.java
?????文件?????????847??1998-08-14?10:28??Source?Code\partFive\animation\BumpAnimationTest.class
?????文件?????????120??1998-08-14?10:28??Source?Code\partFive\animation\BumpAnimationTest.html
?????文件????????2820??1998-08-14?10:28??Source?Code\partFive\animation\BumpAnimationTest.java
?????文件?????????842??1998-08-14?10:28??Source?Code\partFive\animation\BumpAnimationTestPanel.class
?????文件?????????800??1998-08-14?10:28??Source?Code\partFive\animation\BumpPlayfield$1.class
?????文件????????2961??1998-08-14?10:28??Source?Code\partFive\animation\BumpPlayfield.class
?????文件?????????508??1998-08-14?10:28??Source?Code\partFive\animation\CollisionArena.class
?????文件?????????335??1998-08-14?10:28??Source?Code\partFive\animation\CollisionArena.java
?????文件?????????439??1998-08-14?10:28??Source?Code\partFive\animation\CollisionDetector.class
?????文件?????????223??1998-08-14?10:28??Source?Code\partFive\animation\CollisionDetector.java
?????文件????????5544??1998-08-14?10:28??Source?Code\partFive\animation\DoubleBufferedContainer.class
?????文件????????4972??1998-08-14?10:28??Source?Code\partFive\animation\DoubleBufferedContainer.java
?????文件????????2057??1998-08-14?10:28??Source?Code\partFive\animation\EdgeCollisionDetector.class
?????文件????????1328??1998-08-14?10:28??Source?Code\partFive\animation\EdgeCollisionDetector.java
?????文件????????2750??1998-08-14?10:28??Source?Code\partFive\animation\Orientation.class
?????文件????????3353??1998-08-14?10:28??Source?Code\partFive\animation\Orientation.java
?????文件????????2436??1998-08-14?10:28??Source?Code\partFive\animation\Playfield.class
?????文件????????1654??1998-08-14?10:28??Source?Code\partFive\animation\Playfield.java
?????文件????????3876??1998-08-14?10:28??Source?Code\partFive\animation\Sequence.class
?????文件????????3210??1998-08-14?10:28??Source?Code\partFive\animation\Sequence.java
?????文件?????????861??1998-08-14?10:28??Source?Code\partFive\animation\SimpleAnimationTest.class
?????文件?????????124??1998-08-14?10:28??Source?Code\partFive\animation\SimpleAnimationTest.html
?????文件????????1865??1998-08-14?10:28??Source?Code\partFive\animation\SimpleAnimationTest.java
?????文件?????????854??1998-08-14?10:28??Source?Code\partFive\animation\SimpleAnimationTestPanel.class
............此處省略1622個文件信息