org.eclipse.fmc.blockdiagram.editor/src/org/eclipse/fmc/blockdiagram/editor/features/resize/BraceResizeFeature.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.resize;

import org.eclipse.fmc.blockdiagram.editor.algorithm.comment.BraceAlgorithm;
import org.eclipse.fmc.blockdiagram.editor.algorithm.comment.CommentAlgorithmFactory;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.context.IResizeShapeContext;
import org.eclipse.graphiti.features.impl.DefaultResizeShapeFeature;
import org.eclipse.graphiti.mm.algorithms.GraphicsAlgorithm;

/**
 * Resizes the Brace Shape.
 * 
 * @author Rainer Thome
 * @author Benjamin Schmeling 
 * @author Heiko Witteborg 
 * 
 */
public class BraceResizeFeature extends DefaultResizeShapeFeature {

	public BraceResizeFeature(IFeatureProvider fp) {
		super(fp);
	}

	@Override
	public void resizeShape(IResizeShapeContext context) {
		// super.resizeShape(context);

		GraphicsAlgorithm resizeGa = context.getPictogramElement()
				.getGraphicsAlgorithm();
		BraceAlgorithm braceAlgorithm = CommentAlgorithmFactory.getInstance()
				.getBrace();

		int oldContainerWidth = resizeGa.getWidth();
		int oldContainerHeight = resizeGa.getHeight();
		int oldContainerX = resizeGa.getX();
		int oldContainerY = resizeGa.getY();

		int newContainerWidth = context.getWidth();
		int newContainerHeight = context.getHeight();
		int newContainerX = context.getX();
		int newContainerY = context.getY();

		// ensure minimum size of braces
		if (context.getWidth() < braceAlgorithm.getMinimumWidth()) {
			if (oldContainerX != context.getX())
				newContainerX = oldContainerX + oldContainerWidth
						- braceAlgorithm.getMinimumWidth();
			newContainerWidth = braceAlgorithm.getMinimumWidth();
		}
		if (context.getHeight() < braceAlgorithm.getMinimumHeight()) {
			if (oldContainerY != context.getY())
				newContainerY = oldContainerY + oldContainerHeight
						- braceAlgorithm.getMinimumHeight();
			newContainerHeight = braceAlgorithm.getMinimumHeight();
		}

		// Resize visible polyline
		braceAlgorithm.resize(resizeGa, newContainerX, newContainerY,
				newContainerWidth, newContainerHeight);

	}

}