examples/org.eclipse.swt.snippets/src/org/eclipse/swt/snippets/Snippet356.java

/*******************************************************************************
 * Copyright (c) 2011 IBM Corporation and others.
 * All rights reserved. This Example Content is intended to demonstrate
 * usage of Eclipse technology. It is provided to you under the terms and
 * conditions of the Eclipse Distribution License v1.0 which is available
 * at http://www.eclipse.org/org/documents/edl-v10.php
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;

/*
 * StyledText: embed an inline link in StyledText.
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
import org.eclipse.swt.*;
import org.eclipse.swt.custom.*;
import org.eclipse.swt.graphics.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

public class Snippet356 {
	public static void main (String [] args) {
		Display display = new Display ();
		Shell shell = new Shell (display);
		FillLayout layout = new FillLayout();
		layout.marginHeight = layout.marginWidth = 10;
		shell.setLayout(layout);
		
		String string = "This is sample text with a link and some other link here.";
		final StyledText styledText = new StyledText (shell, SWT.MULTI | SWT.BORDER);
		styledText.setText(string);
		
		String link1 = "link";
		String link2 = "here";
		StyleRange style = new StyleRange();
		style.underline = true;
		style.underlineStyle = SWT.UNDERLINE_LINK;
		
		int[] ranges = {string.indexOf(link1), link1.length(), string.indexOf(link2), link2.length()}; 
		StyleRange[] styles = {style, style};
		styledText.setStyleRanges(ranges, styles);
		
		styledText.addListener(SWT.MouseDown, new Listener() {
			@Override
			public void handleEvent(Event event) {
				// It is up to the application to determine when and how a link should be activated.
				// In this snippet links are activated on mouse down when the control key is held down 
				if ((event.stateMask & SWT.MOD1) != 0) {
					try {
						int offset = styledText.getOffsetAtLocation(new Point (event.x, event.y));
						StyleRange style = styledText.getStyleRangeAtOffset(offset);
						if (style != null && style.underline && style.underlineStyle == SWT.UNDERLINE_LINK) {
							System.out.println("Click on a Link");
						}
					} catch (IllegalArgumentException e) {
						// no character under event.x, event.y
					}
					
				}
			}
		});
		shell.setSize (600, 400);
		shell.open ();
		while (!shell.isDisposed ()) {
			if (!display.readAndDispatch ())
				display.sleep ();
		}
		display.dispose ();
	}
}