org.eclipse.swt.snippets.Snippet118.java Source code

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Here is the source code for org.eclipse.swt.snippets.Snippet118.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;

/*
 * Cursor example snippet: create a color cursor from an image file
 *
 * 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.graphics.*;
import org.eclipse.swt.widgets.*;

public class Snippet118 {

    public static void main(String[] args) {
        final Display display = new Display();
        final Shell shell = new Shell(display);
        shell.setText("Snippet 118");
        shell.setSize(150, 150);
        final Cursor[] cursor = new Cursor[1];
        Button button = new Button(shell, SWT.PUSH);
        button.setText("Change cursor");
        Point size = button.computeSize(SWT.DEFAULT, SWT.DEFAULT);
        button.setSize(size);
        button.addListener(SWT.Selection, e -> {
            FileDialog dialog = new FileDialog(shell);
            dialog.setFilterExtensions(new String[] { "*.ico", "*.gif", "*.*" });
            String name = dialog.open();
            if (name == null)
                return;
            ImageData image = new ImageData(name);
            Cursor oldCursor = cursor[0];
            cursor[0] = new Cursor(display, image, 0, 0);
            shell.setCursor(cursor[0]);
            if (oldCursor != null)
                oldCursor.dispose();
        });
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        if (cursor[0] != null)
            cursor[0].dispose();
        display.dispose();
    }
}