snippet65.java

对于可视的桌面开发系统的一些详细的设计资料

/*******************************************************************************
 * Copyright (c) 2000, 2004 IBM Corporation and others.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;
 
/*
 * FormLayout example snippet: create a simple dialog using form layout
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.widgets.*;
import org.eclipse.swt.layout.*;

public class Snippet65 {

public static void main (String [] args) {
	Display display = new Display ();
	final Shell shell = new Shell (display);
	Label label = new Label (shell, SWT.WRAP);
	label.setText ("This is a long text string that will wrap when the dialog is resized.");
	List list = new List (shell, SWT.BORDER | SWT.H_SCROLL | SWT.V_SCROLL);
	list.setItems (new String [] {"Item 1", "Item 2"});
	Button button1 = new Button (shell, SWT.PUSH);
	button1.setText ("OK");
	Button button2 = new Button (shell, SWT.PUSH);
	button2.setText ("Cancel");
	
	final int insetX = 4, insetY = 4;
	FormLayout formLayout = new FormLayout ();
	formLayout.marginWidth = insetX;
	formLayout.marginHeight = insetY;
	shell.setLayout (formLayout);
	
	Point size = label.computeSize (SWT.DEFAULT, SWT.DEFAULT);
	final FormData labelData = new FormData (size.x, SWT.DEFAULT);
	labelData.left = new FormAttachment (0, 0);
	labelData.right = new FormAttachment (100, 0);
	label.setLayoutData (labelData);
	shell.addListener (SWT.Resize, new Listener () {
		public void handleEvent (Event e) {
			Rectangle rect = shell.getClientArea ();
			labelData.width = rect.width - insetX * 2;
			shell.layout ();
		}
	});
		
	FormData button2Data = new FormData ();
	button2Data.right = new FormAttachment (100, -insetX);
	button2Data.bottom = new FormAttachment (100, 0);
	button2.setLayoutData (button2Data);
	
	FormData button1Data = new FormData ();
	button1Data.right = new FormAttachment (button2, -insetX);
	button1Data.bottom = new FormAttachment (100, 0);
	button1.setLayoutData (button1Data);
	
	FormData listData = new FormData ();
	listData.left = new FormAttachment (0, 0);
	listData.right = new FormAttachment (100, 0);
	listData.top = new FormAttachment (label, insetY);
	listData.bottom = new FormAttachment (button2, -insetY);
	list.setLayoutData (listData);
	
	shell.pack ();
	shell.open ();
	while (!shell.isDisposed ()) {
		if (!display.readAndDispatch ()) display.sleep ();
	}
	display.dispose ();
}
}