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/*******************************************************************************
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* Copyright (c) 2004, 2010 IBM Corporation and others.
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* All rights reserved. This program and the accompanying materials
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* are made available under the terms of the Eclipse Public License v1.0
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* which accompanies this distribution, and is available at
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* http://www.eclipse.org/legal/epl-v10.html
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*
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* Contributors:
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* IBM Corporation - initial API and implementation
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*******************************************************************************/
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package org.eclipse.draw2d.graph;
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import org.eclipse.draw2d.PositionConstants;
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import org.eclipse.draw2d.geometry.Point;
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import org.eclipse.draw2d.geometry.Rectangle;
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/**
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* An obstacle representation for the ShortestPathRouting. This is a subclass of
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* Rectangle.
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*
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* This class is for internal use only.
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*
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* @author Whitney Sorenson
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* @since 3.0
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*/
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class Obstacle extends Rectangle {
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boolean exclude;
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Vertex topLeft, topRight, bottomLeft, bottomRight, center;
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private ShortestPathRouter router;
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/**
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* Creates a new obstacle from the given rectangle bounds.
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*
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* @param rect
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* the bounds
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*/
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Obstacle(Rectangle rect, ShortestPathRouter router) {
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init(rect);
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this.router = router;
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}
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/**
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* Returns <code>true</code> if the given point is contained but not on the
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* boundary of this obstacle.
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*
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* @param p
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* a point
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* @return <code>true</code> if properly contained
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*/
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public boolean containsProper(Point p) {
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return p.x > this.x && p.x < this.x + this.width - 1 && p.y > this.y
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&& p.y < this.y + this.height - 1;
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}
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public int getSpacing() {
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return router.getSpacing();
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}
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private void growVertex(Vertex vertex) {
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if (vertex.totalCount > 0)
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vertex.grow();
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}
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/**
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* Grows all vertices on this obstacle.
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*/
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void growVertices() {
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growVertex(topLeft);
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growVertex(topRight);
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growVertex(bottomLeft);
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growVertex(bottomRight);
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}
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/**
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* Initializes this obstacle to the values of the given rectangle
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*
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* @param rect
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* bounds of this obstacle
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*/
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void init(Rectangle rect) {
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this.x = rect.x;
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this.y = rect.y;
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this.width = rect.width;
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this.height = rect.height;
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exclude = false;
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topLeft = new Vertex(x, y, this);
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topLeft.positionOnObstacle = PositionConstants.NORTH_WEST;
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topRight = new Vertex(x + width - 1, y, this);
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topRight.positionOnObstacle = PositionConstants.NORTH_EAST;
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bottomLeft = new Vertex(x, y + height - 1, this);
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bottomLeft.positionOnObstacle = PositionConstants.SOUTH_WEST;
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bottomRight = new Vertex(x + width - 1, y + height - 1, this);
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bottomRight.positionOnObstacle = PositionConstants.SOUTH_EAST;
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center = new Vertex(getCenter(), this);
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}
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/**
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* Requests a full reset on all four vertices of this obstacle.
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*/
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void reset() {
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topLeft.fullReset();
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bottomLeft.fullReset();
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bottomRight.fullReset();
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topRight.fullReset();
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}
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private void shrinkVertex(Vertex vertex) {
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if (vertex.totalCount > 0)
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vertex.shrink();
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}
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/**
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* Shrinks all four vertices of this obstacle.
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*/
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void shrinkVertices() {
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shrinkVertex(topLeft);
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shrinkVertex(topRight);
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shrinkVertex(bottomLeft);
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shrinkVertex(bottomRight);
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}
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/**
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* @see org.eclipse.draw2d.geometry.Rectangle#toString()
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*/
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public String toString() {
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return "Obstacle(" + x + ", " + y + ", " + //$NON-NLS-3$//$NON-NLS-2$//$NON-NLS-1$
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width + ", " + height + ")";//$NON-NLS-2$//$NON-NLS-1$
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}
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}
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