org.eclipse.swt.snippets.Snippet366.java Source code

Introduction

Here is the source code for org.eclipse.swt.snippets.Snippet366.java

Source

/*******************************************************************************
 * Copyright (c) 2015, 2016 Red Hat Inc.
 *
 * 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:
 *     Red Hat Inc - initial API and implementation
 *******************************************************************************/
package org.eclipse.swt.snippets;

import java.util.concurrent.atomic.*;

import org.eclipse.swt.*;
import org.eclipse.swt.layout.*;
import org.eclipse.swt.widgets.*;

/**
 * Buttons with various arrows and methods that affect arrow directions.
 *
 * For a list of all SWT example snippets see
 * http://www.eclipse.org/swt/snippets/
 */
public class Snippet366 {
    static Display display;
    static Shell shell;

    public static void main(String[] args) {
        display = new Display();
        shell = new Shell(display);
        shell.setText("Snippet 366");
        shell.setLayout(new RowLayout());

        makeArrowGroup();
        makeAlignGroup();
        makeOrientationGroup();

        shell.pack();
        shell.open();
        while (!shell.isDisposed()) {
            if (!display.readAndDispatch())
                display.sleep();
        }
        display.dispose();
    }

    private static void makeOrientationGroup() {
        Group orientationGroup = new Group(shell, SWT.None);
        orientationGroup.setLayout(new RowLayout());
        orientationGroup.setText("Orientation group");

        final AtomicInteger prevDir = new AtomicInteger(0);
        final Button alignmentButton = new Button(orientationGroup, SWT.ARROW | SWT.RIGHT);
        alignmentButton.addListener(SWT.MouseDown, event -> {
            switch (prevDir.get()) {
            case 0:
                alignmentButton.setOrientation(SWT.LEFT_TO_RIGHT);
                prevDir.set(1);
                break;
            case 1:
                alignmentButton.setOrientation(SWT.RIGHT_TO_LEFT);
                prevDir.set(0);
                break;
            default:
                break;
            }
        });
    }

    private static void makeAlignGroup() {
        Group alignGroup = new Group(shell, SWT.None);
        alignGroup.setLayout(new RowLayout());
        alignGroup.setText("Alignment group");

        final AtomicInteger prevDir = new AtomicInteger(0);
        final Button alignmentButton = new Button(alignGroup, SWT.ARROW | SWT.UP);
        alignmentButton.addListener(SWT.MouseDown, event -> {
            switch (prevDir.get()) {
            case 0:
                alignmentButton.setAlignment(SWT.RIGHT);
                prevDir.set(1);
                break;
            case 1:
                alignmentButton.setAlignment(SWT.DOWN);
                prevDir.set(2);
                break;
            case 2:
                alignmentButton.setAlignment(SWT.LEFT);
                prevDir.set(3);
                break;
            case 3:
                alignmentButton.setAlignment(SWT.UP);
                prevDir.set(0);
            default:
                break;
            }
        });
    }

    private static void makeArrowGroup() {
        Group arrowGroup = new Group(shell, SWT.None);
        arrowGroup.setText("Arrow group");
        arrowGroup.setLayout(new RowLayout());

        new Button(arrowGroup, SWT.ARROW | SWT.LEFT);
        new Button(arrowGroup, SWT.ARROW | SWT.RIGHT);
        new Button(arrowGroup, SWT.ARROW | SWT.UP);
        new Button(arrowGroup, SWT.ARROW | SWT.DOWN);
    }
}