java不规则窗体 的创建

package sourcecode; import org.eclipse.swt.SWT; import org.eclipse.swt.graphics.Image; import org.eclipse.swt.graphics.ImageData; import org.eclipse.swt.graphics.Point; import org.eclipse.swt.graphics.Region; import org.eclipse.swt.widgets.Display; import org.eclipse.swt.widgets.Event; import org.eclipse.swt.widgets.Listener; import org.eclipse.swt.widgets.Shell; /** * @author lejuo * */ public class MainWindows { protected Shell shell; protected Display display = Display.getDefault(); protected Image image = null; protected ImageData imageData = null; /** * Launch the application * @param args */ public static void main(String[] args) { try { MainWindows window = new MainWindows(); window.open(); } catch (Exception e) { e.printStackTrace(); } } /** * Open the window */ public void open() { display = Display.getDefault(); createContents(); shell.open(); shell.layout(); while (!shell.isDisposed()) { if (!display.readAndDispatch()) display.sleep(); } } /** * @author:lejuo * @date&time:Aug 15, 2007 9:09:55 AM * @Instruction: */ private void loadImageToShell(){ //加载图片 image = ImageLoad.getInstance().getImage(display); //region代表区域，以下代码要求构造区域 Region region = new Region(); imageData = image.getImageData(); //区分image是α还是β像素 if (imageData.alphaData != null) { for (int y = 0; y < imageData.height; y++) { for (int x = 0; x < imageData.width; x++) { if (imageData.getAlpha(x, y) ==255) { region.add(imageData.x + x,imageData.y + y,1,1); } } } } else { ImageData mask = imageData.getTransparencyMask(); for (int y = 0; y < mask.height; y++) { for (int x = 0; x < mask.width; x++) { if (mask.getPixel(x, y) !=0 ) { region.add(imageData.x + x,imageData.y + y,1,1); } } } } shell.setRegion(region); shell.setSize(imageData.x + imageData.width, imageData.y + imageData.height); } /** * Create contents of the window */ /** * @author:lejuo * @date&time:Aug 15, 2007 9:10:34 AM * @Instruction: */ protected void createContents() { shell = new Shell(display, SWT.NO_TRIM);//没有边框造型 shell.setSize(500, 375); shell.setText("演示程序"); loadImageToShell(); Listener listen = new Listener() { int startX, startY; public void handleEvent(Event e) { //添加esc按钮事件 if (e.type == SWT.KeyDown && e.character == SWT.ESC) { shell.dispose(); } //添加鼠标点击事件 if (e.type == SWT.MouseDown && e.button == 1) { startX = e.x; startY = e.y; } //添加鼠标图东窗体事件 if (e.type == SWT.MouseMove && (e.stateMask & SWT.BUTTON1) != 0) { Point p = shell.toDisplay(e.x, e.y); p.x -= startX; p.y -= startY; shell.setLocation(p); } //窗体重新绘制 if (e.type == SWT.Paint) { //将不规则图片设为窗体背景，这样就完成了不规则窗体的绘制 e.gc.drawImage(image, imageData.x, imageData.y); } } }; shell.addListener(SWT.KeyDown, listen); shell.addListener(SWT.MouseDown, listen); shell.addListener(SWT.MouseMove, listen); shell.addListener(SWT.Paint, listen); } }