ScrollTopLeftAction.java

/*******************************************************************************
 * Copyright (c) 2017 itemis AG 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:
 *     Matthias Wienand (itemis AG) - initial API and implementation
 *
 *******************************************************************************/
package org.eclipse.gef.mvc.fx.ui.actions;

import org.eclipse.gef.geometry.planar.Point;
import org.eclipse.gef.mvc.fx.ui.MvcFxUiBundle;
import org.eclipse.jface.action.IAction;
import org.eclipse.jface.resource.ImageDescriptor;

import javafx.geometry.Bounds;

/**
 * The {@link ScrollTopRightAction} is an {@link AbstractScrollAction} that
 * aligns the contents of the viewer with the top/left viewport position, i.e.
 * the top/left corner of the contents will be at the top/left corner of the
 * viewport after performing this action.
 *
 * @author mwienand
 *
 */
public class ScrollTopLeftAction extends AbstractScrollAction {

	/**
	 * Constructs a new {@link ScrollTopLeftAction}.
	 */
	public ScrollTopLeftAction() {
		this("Scroll Top/Left", IAction.AS_PUSH_BUTTON,
				MvcFxUiBundle.getDefault().getImageRegistry().getDescriptor(
						MvcFxUiBundle.IMG_ICONS_SCROLL_TOP_LEFT));
	}

	/**
	 * Constructs a new {@link ScrollTopLeftAction} with the given text and
	 * style. Also sets the given {@link ImageDescriptor} for this action.
	 *
	 * @param text
	 *            Text for the action.
	 * @param style
	 *            Style for the action, see {@link IAction} for details.
	 * @param imageDescriptor
	 *            {@link ImageDescriptor} specifying the icon for the action.
	 */
	protected ScrollTopLeftAction(String text, int style,
			ImageDescriptor imageDescriptor) {
		super(text, style, imageDescriptor);
	}

	@Override
	protected Point determinePivotPoint(Bounds bounds) {
		return new Point(bounds.getMinX(), bounds.getMinY());
	}
}