org.eclipse.fmc.blockdiagram.editor/src/org/eclipse/fmc/blockdiagram/editor/features/add/AreaBorderAddFeature.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.add;

import org.eclipse.fmc.blockdiagram.editor.util.StyleUtil;
import org.eclipse.graphiti.features.IFeatureProvider;
import org.eclipse.graphiti.features.context.IAddContext;
import org.eclipse.graphiti.mm.algorithms.MultiText;
import org.eclipse.graphiti.mm.algorithms.Polyline;
import org.eclipse.graphiti.mm.algorithms.Rectangle;
import org.eclipse.graphiti.mm.algorithms.styles.LineStyle;
import org.eclipse.graphiti.mm.algorithms.styles.Orientation;
import org.eclipse.graphiti.mm.pictograms.ContainerShape;
import org.eclipse.graphiti.mm.pictograms.PictogramElement;

/**
 * This feature adds the graphical representation of an Area Border to the
 * diagram.
 * 
 * @author Heiko Witteborg
 * 
 */
public class AreaBorderAddFeature extends ShapeAddFeature {

	private static final int MIN_HEIGHT = 100;
	private static final int MIN_WIDTH = 100;

	/**
	 * 
	 * @param fp
	 *            The feature provider.
	 */
	public AreaBorderAddFeature(IFeatureProvider fp) {
		super(fp);
		super.minimumWidth = MIN_WIDTH;
		super.minimumHeight = MIN_HEIGHT;
	}

	/**
	 * 
	 * @param featureProvider
	 *            The feature provider.
	 * @param linked
	 *            True if the pictogram element should be linked to a model
	 *            object.
	 */
	public AreaBorderAddFeature(IFeatureProvider featureProvider, boolean linked) {
		super(featureProvider);
		super.minimumWidth = MIN_WIDTH;
		super.minimumHeight = MIN_HEIGHT;
		super.linked = linked;
	}

	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.fmc.blockdiagram.editor.features.add.ShapeAddFeature#canAdd
	 * (org.eclipse.graphiti.features.context.IAddContext)
	 */
	@Override
	public boolean canAdd(IAddContext context) {
		return true;
	}

	
	/*
	 * (non-Javadoc)
	 * 
	 * @see
	 * org.eclipse.graphiti.func.IAdd#add(org.eclipse.graphiti.features.context
	 * .IAddContext)
	 */
	@Override
	public PictogramElement add(IAddContext context) {
		ContainerShape container = context.getTargetContainer();
		ContainerShape areaBorderContainer = pe.createContainerShape(container,
				true);

		Rectangle invRec = ga.createInvisibleRectangle(areaBorderContainer);
		invRec.setStyle(StyleUtil.getStyle(getDiagram(), StyleUtil.SHAPE));
		if (linked)
			link(areaBorderContainer, context.getNewObject());

		int w = context.getWidth();
		int h = context.getHeight();
		int min = 100;
		// check that the longer dim is at least min
		if (context.getWidth() > context.getHeight()) {
			w = context.getWidth() < min ? min : w;
		} else {
			h = context.getHeight() < min ? min : h;
		}

		int margin = 2;
		int lineWidth = 2;
		int textHeight = 20;
		int textWidth = 100;

		// dashed line
		Polyline line = ga.createPolyline(invRec);
		line.setLineStyle(LineStyle.DASH);
		line.setLineWidth(lineWidth);
		line.setParentGraphicsAlgorithm(invRec);
		line.setStyle(StyleUtil.getStyle(getDiagram(), StyleUtil.SHAPE));
		// description text
		MultiText txt = ga.createMultiText(invRec, "Area Border");
		txt.setForeground(manageColor(0, 0, 0));
		txt.setStyle(StyleUtil.getStyle(getDiagram(), StyleUtil.SHAPE));
		// txt.setFont(ga.manageFont(getDiagram(), "Arial", 10, false, false));
		txt.setParentGraphicsAlgorithm(invRec);

		if (context.getWidth() > context.getHeight()) {
			// position of containing rectangle
			ga.setLocationAndSize(invRec, context.getX(), context.getY(), w, 3
					* margin + lineWidth + textHeight);

			// position of text field
			txt.setHorizontalAlignment(Orientation.ALIGNMENT_RIGHT);
			txt.setVerticalAlignment(Orientation.ALIGNMENT_BOTTOM);
			ga.setLocationAndSize(txt, margin, margin, w - (2 * margin),
					textHeight);

			// position of dashed line
			ga.setLocationAndSize(line, 0, 2 * margin + textHeight, w, 2);
			line.getPoints().add(ga.createPoint(0, 0));
			line.getPoints().add(ga.createPoint(w, 0));
		} else {
			// position of containing rectangle
			ga.setLocationAndSize(invRec, context.getX(), context.getY(), 3
					* margin + lineWidth + textWidth, h);

			// position of dashed line
			ga.setLocationAndSize(line, margin, 0, 2, h);
			line.getPoints().add(ga.createPoint(0, 0));
			line.getPoints().add(ga.createPoint(0, h));

			// position of text field
			txt.setHorizontalAlignment(Orientation.ALIGNMENT_LEFT);
			txt.setVerticalAlignment(Orientation.ALIGNMENT_BOTTOM);
			ga.setLocationAndSize(txt, 2 * margin + lineWidth, margin,
					textWidth, h - 2 * margin);
		}

		return areaBorderContainer;
	}

}