java.awt.Window#getBackground ( )源码实例Demo

public void testChildPropertiesWithDialogAsParent() {

        parentDialog = new Dialog((Dialog) null, "parent Dialog");
        parentDialog.setSize(WIDTH, HEIGHT);
        parentDialog.setLocation(100, 100);
        parentDialog.setBackground(Color.RED);
        parentLabel = new Label("ParentForegroundAndFont");
        parentFont = new Font("Courier New", Font.ITALIC, 15);
        parentDialog.setForeground(Color.BLUE);
        parentDialog.setFont(parentFont);

        parentDialog.add(parentLabel);
        parentDialog.setVisible(true);

        windowChild = new Window(parentDialog);
        windowChild.setSize(WIDTH, HEIGHT);
        windowChild.setLocation(WIDTH + 200, 100);
        childLabel = new Label("ChildForegroundAndFont");
        windowChild.add(childLabel);
        windowChild.setVisible(true);

        if (parentDialog.getBackground() == windowChild.getBackground()) {
            dispose();
            throw new RuntimeException("Child Window Should NOT Inherit "
                    + "Parent Dialog's Background Color");
        }
        if (parentDialog.getForeground() == windowChild.getForeground()) {
            dispose();
            throw new RuntimeException("Child Window Should NOT Inherit "
                    + "Parent Dialog's Foreground Color");
        }
        if (parentDialog.getFont() == windowChild.getFont()) {
            dispose();
            throw new RuntimeException("Child Window Should NOT Inherit "
                    + "Parent Dialog's Font Color");
        }
    }
 

public void testChildPropertiesWithFrameAsParent() {

        parentFrame = new Frame("parent Frame");
        parentFrame.setSize(WIDTH, HEIGHT);
        parentFrame.setLocation(100, 400);
        parentFrame.setBackground(Color.BLUE);
        parentLabel = new Label("ParentForegroundAndFont");
        parentFont = new Font("Courier New", Font.ITALIC, 15);
        parentFrame.setForeground(Color.RED);
        parentFrame.setFont(parentFont);
        parentFrame.add(parentLabel);
        parentFrame.setVisible(true);

        frameChildWindow = new Window(parentFrame);
        frameChildWindow.setSize(WIDTH, HEIGHT);
        frameChildWindow.setLocation(WIDTH + 200, 400);
        childLabel = new Label("ChildForegroundAndFont");
        frameChildWindow.add(childLabel);
        frameChildWindow.setVisible(true);

        if (parentFrame.getBackground() == frameChildWindow.getBackground()) {
            dispose();
            throw new RuntimeException("Child Window Should NOT Inherit "
                    + "Parent Frame's Background Color");
        }
        if (parentDialog.getForeground() == windowChild.getForeground()) {
            dispose();
            throw new RuntimeException("Child Window Should NOT Inherit "
                    + "Parent Frame's Foreground Color");
        }
        if (parentDialog.getFont() == windowChild.getFont()) {
            dispose();
            throw new RuntimeException("Child Window Should NOT Inherit "
                    + "Parent Frame's Font Color");
        }
    }
 

public void setWindowOpaque(Window window, boolean isOpaque) {
	// prevent setting if not supported
	if(!isTranslucencyCapable(window.getGraphicsConfiguration()) ||
			!isTranslucencySupported(Translucency.PERPIXEL_TRANSLUCENT, window.getGraphicsConfiguration().getDevice())) {
		return;
	}
	final Color background = window.getBackground();
	final int alpha = isOpaque ? OPAQUE : NOT_OPAQUE;
	window.setBackground(new Color(background.getRed(), background.getGreen(), background.getBlue(), alpha));
}
 

/**
	 * Sets the window opaque.
	 *
	 * @param w the w
	 * @param opaque the opaque
	 */
	public static void setWindowOpaque(Window w, boolean opaque)
	{
//		//## Fix for: Issue BELNF-5, 目前因Jack Jiang手头没有Linux等测试环境，目前就暂时先让这
//		//## 些平台不支持窗口透明吧，起码先把BE LNF跑起来再说，此问题以后再彻底解决
//		if(!Platform.isWindows())
//		{
//			System.out.println(UN_WINDOWS_SORRY);
//			return;
//		}
		
		try
		{
//			com.sun.awt.AWTUtilities.setWindowOpaque(w, opaque);
			//1.6.0_u12及以后版本
			if(JVM.current().isOneDotSixUpdate12OrAfter())//JDK1_6_U10//为什么要到u12才支持？因u10里的窗口透明存在BUG 6750920
			{
				if(!isTranslucencySupported())
				{
					LogHelper.debug("Your OS can't supported translucency.");
					return;
				}
				
				//1.7.0及以后版本
				if(JVM.current().isOrLater(JVM.JDK1_7))
				{
//					if(isWindowTranslucencySupported())
					Color bgc = w.getBackground();
					//* 2012-09-22 由Jack Jiang注释：在群友机器上（win7+java1.7.0.1）的生产系统下
					//* 下使用BeautyEye有时w.getBackground()返回值是null，但为什么返回是null，Jack 没
					//* 有测出来（Jack测试都是正常的），暂且认为是其系统代码有问题吧，在此容错一下
					if(bgc == null)
						bgc = Color.black;//暂不知道用此黑色作为容错值合不合适
					Color newBgn = new Color(bgc.getRed(),bgc.getGreen(), bgc.getBlue(), opaque?255:0);
					w.setBackground(newBgn);
				}
				else
					ReflectHelper.invokeStaticMethod("com.sun.awt.AWTUtilities", "setWindowOpaque"
							, new Class[]{Window.class, boolean.class}, new Object[]{w, opaque});
			}
			else
				LogHelper.debug("您的JRE版本不支持窗口透明(需jre1.6_u12及以上版本)，BeautyEye外观将不能达到最佳视觉效果哦.");
		}
		catch (Exception e)
		{
			if(BeautyEyeLNFHelper.debug)
				e.printStackTrace();
			LogHelper.debug("您的JRE版本不支持窗口透明(需jre1.6_u12及以上版本)，BeautyEye外观将不能达到最佳视觉效果哦."+e.getMessage());
//			e.printStackTrace();
		}
	}