bundles/org.eclipse.draw2d/src/org/eclipse/draw2d/ArrowButton.java

/*******************************************************************************
 * Copyright (c) 2000, 2010 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.draw2d;

import org.eclipse.draw2d.geometry.Insets;

/**
 * A Button which displays a triangle pointing in a specified direction. This
 * class is used by the {@link ScrollBar} figure.
 */
public class ArrowButton extends Button implements Orientable {

	{
		createTriangle();
		setRequestFocusEnabled(false);
		setFocusTraversable(false);
	}

	/**
	 * Constructs a default ArrowButton with the arrow pointing north.
	 * 
	 * @since 2.0
	 */
	public ArrowButton() {
	}

	/**
	 * Constructs an ArrowButton with the arrow having the direction given in
	 * the input. The direction can be one of many directional constants defined
	 * in {@link PositionConstants}.
	 * 
	 * @param direction
	 *            Direction of the arrow
	 * @since 2.0
	 */
	public ArrowButton(int direction) {
		setDirection(direction);
	}

	/**
	 * Contructs a triangle with a black background pointing north, and sets it
	 * as the contents of the button.
	 * 
	 * @since 2.0
	 */
	protected void createTriangle() {
		Triangle tri = new Triangle();
		tri.setOutline(true);
		tri.setBackgroundColor(ColorConstants.listForeground);
		tri.setForegroundColor(ColorConstants.listForeground);
		tri.setBorder(new MarginBorder(new Insets(2)));
		setContents(tri);
	}

	/**
	 * @see org.eclipse.draw2d.Orientable#setDirection(int)
	 */
	public void setDirection(int value) {
		setChildrenDirection(value);
	}

	/**
	 * @see org.eclipse.draw2d.Orientable#setOrientation(int)
	 */
	public void setOrientation(int value) {
		setChildrenOrientation(value);
	}

}