org.eclipse.fmc.blockdiagram.editor/src/org/eclipse/fmc/blockdiagram/editor/features/custom/FlipHorizontallyCustomFeature.java

/*******************************************************************************
 * <copyright>
 *
 * Copyright (c) 2013, 2013 SAP AG.
 * 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:
 *    SAP AG - initial API, implementation and documentation
 *
 * </copyright>
 *
 *******************************************************************************/
package org.eclipse.fmc.blockdiagram.editor.features.custom;

import org.eclipse.fmc.blockdiagram.editor.algorithm.element.FMCElementAlgorithm;
import org.eclipse.fmc.blockdiagram.editor.algorithm.element.FMCElementAlgorithmFactory;
import org.eclipse.fmc.blockdiagram.editor.algorithm.node.RotatableNode;
import org.eclipse.fmc.blockdiagram.editor.diagram.BlockDiagramImageProvider;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.context.ICustomContext;
import org.eclipse.graphiti.mm.algorithms.GraphicsAlgorithm;
import org.eclipse.graphiti.mm.pictograms.ContainerShape;
import org.eclipse.graphiti.mm.pictograms.PictogramElement;

/**
 * Flips the selected element horizontally.
 * 
 * @author Heiko Witteborg
 * 
 */
public class FlipHorizontallyCustomFeature extends FMCCustomFeature {

	/**
	 * Default constructor.
	 * 
	 * @param featureProvider
	 *            The feature provider.
	 */
	public FlipHorizontallyCustomFeature(IFeatureProvider featureProvider) {
		super(featureProvider, "Transform");
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see org.eclipse.graphiti.features.impl.AbstractFeature#getName()
	 */
	@Override
	public String getName() {
		return "Flip horizontally";
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.graphiti.features.custom.AbstractCustomFeature#getImageId()
	 */
	@Override
	public String getImageId() {
		return BlockDiagramImageProvider.ICON_FLIP_HORIZONTALLY
				+ BlockDiagramImageProvider.SIZE_16;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.graphiti.features.custom.AbstractCustomFeature#getDescription
	 * ()
	 */
	@Override
	public String getDescription() {
		return "Flip element horizontally";
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.graphiti.features.custom.AbstractCustomFeature#canExecute
	 * (org.eclipse.graphiti.features.context.ICustomContext)
	 */
	@Override
	public boolean canExecute(ICustomContext context) {
		PictogramElement[] pes = context.getPictogramElements();
		if (pes != null && pes.length == 1
				&& context.getPictogramElements()[0] instanceof ContainerShape) {
			ContainerShape container = (ContainerShape) context
					.getPictogramElements()[0];
			FMCElementAlgorithm ea = FMCElementAlgorithmFactory.getInstance()
					.getShape(container);
			if (ea instanceof RotatableNode) {
				return true;
			}
		}
		return false;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.graphiti.features.custom.ICustomFeature#execute(org.eclipse
	 * .graphiti.features.context.ICustomContext)
	 */
	@Override
	public void execute(ICustomContext context) {
		PictogramElement[] pes = context.getPictogramElements();
		if (pes != null && pes.length == 1) {
			ContainerShape container = (ContainerShape) context
					.getPictogramElements()[0];
			FMCElementAlgorithm ea = FMCElementAlgorithmFactory.getInstance()
					.getShape(container);
			GraphicsAlgorithm invisibleGa = container.getGraphicsAlgorithm();
			if (ea instanceof RotatableNode) {
				((RotatableNode) ea).flipHorizontally(invisibleGa);
			}
		}
	}

}