org.eclipse.swt.snippets.Snippet268.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet268.java

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/*******************************************************************************
 * Copyright (c) 2000, 2016 IBM Corporation and others.
 *
 * This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License 2.0
 * which accompanies this distribution, and is available at
 * https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 * Contributors:
 *     IBM Corporation - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;

/*
 * UI Automation (for testing tools) snippet: post mouse wheel events to a styled text
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 *
 * @since 3.0
 */
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 Snippet268 {

    public static void main(String[] args) {
        final Display display = new Display();
        Shell shell = new Shell(display);
        shell.setText("Snippet 268");
        shell.setLayout(new FillLayout());
        StyledText styledText = new StyledText(shell, SWT.V_SCROLL);
        String multiLineString = "";
        for (int i = 0; i < 200; i++) {
            multiLineString = multiLineString.concat("This is line number " + i + " in the multi-line string.\n");
        }
        styledText.setText(multiLineString);
        shell.setSize(styledText.computeSize(SWT.DEFAULT, 400));
        shell.open();
        // move cursor over styled text
        Rectangle clientArea = shell.getClientArea();
        Point location = shell.getLocation();
        Event event = new Event();
        event.type = SWT.MouseMove;
        event.x = location.x + clientArea.width / 2;
        event.y = location.y + clientArea.height / 2;
        display.post(event);
        styledText.addListener(SWT.MouseWheel, e -> System.out.println("Mouse Wheel event " + e));
        new Thread() {
            Event event;

            @Override
            public void run() {
                for (int i = 0; i < 50; i++) {
                    event = new Event();
                    event.type = SWT.MouseWheel;
                    event.detail = SWT.SCROLL_LINE;
                    event.count = -2;
                    if (!display.isDisposed())
                        display.post(event);
                    try {
                        Thread.sleep(100);
                    } catch (InterruptedException e) {
                    }
                }
            }
        }.start();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }
}