plugins/org.eclipse.uml2.diagram.activity/src/org/eclipse/uml2/diagram/activity/edit/parts/DecisionNode2EditPart.java

package org.eclipse.uml2.diagram.activity.edit.parts;

import org.eclipse.draw2d.Graphics;
import org.eclipse.draw2d.IFigure;
import org.eclipse.draw2d.Shape;
import org.eclipse.draw2d.StackLayout;
import org.eclipse.draw2d.geometry.Point;
import org.eclipse.draw2d.geometry.PointList;
import org.eclipse.draw2d.geometry.Rectangle;
import org.eclipse.gef.EditPart;
import org.eclipse.gef.EditPolicy;
import org.eclipse.gef.Request;
import org.eclipse.gef.commands.Command;
import org.eclipse.gef.editpolicies.LayoutEditPolicy;
import org.eclipse.gef.editpolicies.NonResizableEditPolicy;
import org.eclipse.gef.requests.CreateRequest;
import org.eclipse.gmf.runtime.diagram.ui.editparts.ShapeNodeEditPart;
import org.eclipse.gmf.runtime.diagram.ui.editpolicies.EditPolicyRoles;
import org.eclipse.gmf.runtime.gef.ui.figures.DefaultSizeNodeFigure;
import org.eclipse.gmf.runtime.gef.ui.figures.NodeFigure;
import org.eclipse.gmf.runtime.notation.View;
import org.eclipse.uml2.diagram.activity.edit.policies.DecisionNode2CanonicalEditPolicy;
import org.eclipse.uml2.diagram.activity.edit.policies.DecisionNode2ItemSemanticEditPolicy;
import org.eclipse.uml2.diagram.common.editparts.PrimaryShapeEditPart;

/**
 * @generated
 */
public class DecisionNode2EditPart extends ShapeNodeEditPart implements PrimaryShapeEditPart {

	/**
	 * @generated
	 */
	public static final int VISUAL_ID = 3015;

	/**
	 * @generated
	 */
	protected IFigure contentPane;

	/**
	 * @generated
	 */
	protected IFigure primaryShape;

	/**
	 * @generated
	 */
	public DecisionNode2EditPart(View view) {
		super(view);
	}

	/**
	 * @generated
	 */
	protected void createDefaultEditPolicies() {
		super.createDefaultEditPolicies();
		installEditPolicy(EditPolicyRoles.SEMANTIC_ROLE, new DecisionNode2ItemSemanticEditPolicy());
		installEditPolicy(EditPolicyRoles.CANONICAL_ROLE, new DecisionNode2CanonicalEditPolicy());
		installEditPolicy(EditPolicy.LAYOUT_ROLE, createLayoutEditPolicy());
		// XXX need an SCR to runtime to have another abstract superclass that would let children add reasonable editpolicies
		// removeEditPolicy(org.eclipse.gmf.runtime.diagram.ui.editpolicies.EditPolicyRoles.CONNECTION_HANDLES_ROLE);
	}

	/**
	 * @generated
	 */
	protected LayoutEditPolicy createLayoutEditPolicy() {
		LayoutEditPolicy lep = new LayoutEditPolicy() {

			protected EditPolicy createChildEditPolicy(EditPart child) {
				EditPolicy result = child.getEditPolicy(EditPolicy.PRIMARY_DRAG_ROLE);
				if (result == null) {
					result = new NonResizableEditPolicy();
				}
				return result;
			}

			protected Command getMoveChildrenCommand(Request request) {
				return null;
			}

			protected Command getCreateCommand(CreateRequest request) {
				return null;
			}
		};
		return lep;
	}

	/**
	 * @generated
	 */
	protected IFigure createNodeShape() {
		ScalableRhombFigure figure = new ScalableRhombFigure();
		return primaryShape = figure;
	}

	/**
	 * @generated
	 */
	public ScalableRhombFigure getPrimaryShape() {
		return (ScalableRhombFigure) primaryShape;
	}

	/**
	 * @generated
	 */
	protected NodeFigure createNodePlate() {
		DefaultSizeNodeFigure result = new DefaultSizeNodeFigure(getMapMode().DPtoLP(40), getMapMode().DPtoLP(40));
		return result;
	}

	/**
	 * Creates figure for this edit part.
	 * 
	 * Body of this method does not depend on settings in generation model
	 * so you may safely remove <i>generated</i> tag and modify it.
	 * 
	 * @generated
	 */
	protected NodeFigure createNodeFigure() {
		NodeFigure figure = createNodePlate();
		figure.setLayoutManager(new StackLayout());
		IFigure shape = createNodeShape();
		figure.add(shape);
		contentPane = setupContentPane(shape);
		return figure;
	}

	/**
	 * Default implementation treats passed figure as content pane.
	 * Respects layout one may have set for generated figure.
	 * @param nodeShape instance of generated figure class
	 * @generated
	 */
	protected IFigure setupContentPane(IFigure nodeShape) {
		return nodeShape; // use nodeShape itself as contentPane
	}

	/**
	 * @generated
	 */
	public IFigure getContentPane() {
		if (contentPane != null) {
			return contentPane;
		}
		return super.getContentPane();
	}

	/**
	 * @generated
	 */
	public class ScalableRhombFigure extends Shape {

		/**
		 * @generated
		 */
		public ScalableRhombFigure() {
			this.addPoint(new Point(getMapMode().DPtoLP(20), getMapMode().DPtoLP(0)));
			this.addPoint(new Point(getMapMode().DPtoLP(40), getMapMode().DPtoLP(20)));
			this.addPoint(new Point(getMapMode().DPtoLP(20), getMapMode().DPtoLP(40)));
			this.addPoint(new Point(getMapMode().DPtoLP(0), getMapMode().DPtoLP(20)));
		}

		/**
		 * @generated
		 */
		private final PointList myTemplate = new PointList();

		/**
		 * @generated
		 */
		private Rectangle myTemplateBounds;

		/**
		 * @generated
		 */
		public void addPoint(Point point) {
			myTemplate.addPoint(point);
			myTemplateBounds = null;
		}

		/**
		 * @generated
		 */
		protected void fillShape(Graphics graphics) {
			Rectangle bounds = getBounds();
			graphics.pushState();
			graphics.translate(bounds.x, bounds.y);
			graphics.fillPolygon(scalePointList());
			graphics.popState();
		}

		/**
		 * @generated
		 */
		protected void outlineShape(Graphics graphics) {
			Rectangle bounds = getBounds();
			graphics.pushState();
			graphics.translate(bounds.x, bounds.y);
			graphics.drawPolygon(scalePointList());
			graphics.popState();
		}

		/**
		 * @generated
		 */
		private Rectangle getTemplateBounds() {
			if (myTemplateBounds == null) {
				myTemplateBounds = myTemplate.getBounds().getCopy().union(0, 0);
				//just safety -- we are going to use this as divider 
				if (myTemplateBounds.width < 1) {
					myTemplateBounds.width = 1;
				}
				if (myTemplateBounds.height < 1) {
					myTemplateBounds.height = 1;
				}
			}
			return myTemplateBounds;
		}

		/**
		 * @generated
		 */
		private int[] scalePointList() {
			Rectangle pointsBounds = getTemplateBounds();
			Rectangle actualBounds = getBounds();

			float xScale = ((float) actualBounds.width) / pointsBounds.width;
			float yScale = ((float) actualBounds.height) / pointsBounds.height;

			if (xScale == 1 && yScale == 1) {
				return myTemplate.toIntArray();
			}
			int[] scaled = (int[]) myTemplate.toIntArray().clone();
			for (int i = 0; i < scaled.length; i += 2) {
				scaled[i] = (int) Math.floor(scaled[i] * xScale);
				scaled[i + 1] = (int) Math.floor(scaled[i + 1] * yScale);
			}
			return scaled;
		}

	}

}