一個仿 Eclipse 歡迎視窗的代碼 – FormLayout典型樣本

一個仿 Eclipse 歡迎視窗的代碼

一個背景圖片，最下方是一個進度條，上面有一個label，顯示一些資訊

技術點總結：

一、視窗置中

二、Form布局

三、SWT UI線程調度（本例實現了一個假的），注意到，只有UI線程才能操作UI的控制項。

在別的Windows中 new WelcomeWindow().open()即可，此Windows執行完載入任務後會自動關閉。

/** * Welcome Window */public class WelcomeWindow {//private static Logger logger = LoggerFactory.getLogger(WelcomeWindow.class);private Shell shell;/** * Open the window. */public void open() {Display display = Display.getDefault();createContents();configureShell();shell.open();// shell.layout();while (!shell.isDisposed()) {if (!display.readAndDispatch()) {display.sleep();}}}/** * Configure shell *  * @param shell */protected void configureShell() {shell.pack();Rectangle rctDisplay = shell.getDisplay().getBounds();Rectangle rctShell = shell.getBounds();int x = (rctDisplay.width - rctShell.width) / 2;int y = (rctDisplay.height - rctShell.height) / 2;shell.setLocation(x, y);}/** * Create contents of the window. */protected void createContents() {shell = new Shell(SWT.ON_TOP);shell.setLayout(new FillLayout());// Composite as containerComposite container = new Composite(shell, SWT.NONE);FormLayout layout = new FormLayout();container.setLayout(layout);// ProgressBarfinal ProgressBar bar = new ProgressBar(container, SWT.HORIZONTAL);bar.setMinimum(0);bar.setMaximum(100);final int min = bar.getMinimum();final int max = bar.getMaximum();FormData formData = null;formData = new FormData();formData.left = new FormAttachment(0, 0);formData.right = new FormAttachment(100, 0);formData.bottom = new FormAttachment(100, 0);bar.setLayoutData(formData);// Label Messagefinal Label lblMessage = new Label(container, SWT.INHERIT_DEFAULT);lblMessage.setBackground(shell.getDisplay().getSystemColor(SWT.COLOR_WHITE));formData = new FormData();formData.left = new FormAttachment(0, 0);formData.right = new FormAttachment(60);formData.bottom = new FormAttachment(bar, 0);lblMessage.setLayoutData(formData);// Label ImageLabel lblImage = new Label(container, SWT.NONE);lblImage.setImage(Registry.getImage("logo.bmp"));formData = new FormData();formData.left = new FormAttachment(0, 0);formData.top = new FormAttachment(0, 0);lblImage.setLayoutData(formData);final int step = 5;new Thread(new Runnable() {public void run() {shell.getDisplay().asyncExec(new Runnable() {public void run() {for (int i = min; i < max; i += step) {if (bar.isDisposed()) {return;}try {Thread.sleep(100);} catch (InterruptedException e) {e.printStackTrace();}String text = GlobalVariable.getResourceBundle().getString("ww.bar.loading");text = MessageFormat.format(text, bar.getSelection(), StringUtils.repeat('.', i / step));lblMessage.setText(text);bar.setSelection(bar.getSelection() + i);}shell.dispose();}});}}).start();}}