1 /*******************************************************************************
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2 * Copyright (c) 2007, 2010 Association for Decentralized Information Management
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3 * in Industry THTH ry.
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4 * All rights reserved. This program and the accompanying materials
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5 * are made available under the terms of the Eclipse Public License v1.0
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6 * which accompanies this distribution, and is available at
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7 * http://www.eclipse.org/legal/epl-v10.html
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10 * VTT Technical Research Centre of Finland - initial API and implementation
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11 *******************************************************************************/
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12 package org.simantics.g2d.element.handler;
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14 import java.awt.Shape;
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15 import java.awt.geom.AffineTransform;
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17 import org.simantics.g2d.diagram.handler.Topology.Terminal;
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18 import org.simantics.g2d.element.IElement;
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19 import org.simantics.g2d.element.handler.impl.StaticTerminals;
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20 import org.simantics.g2d.utils.geom.DirectionSet;
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24 * @See {@link TerminalTopology} Enumeration of terminals
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25 * @See {@link StaticTerminals} Compile handler for elements with static terminals (almost all)
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26 * @author Toni Kalajainen
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28 public interface TerminalLayout extends ElementHandler {
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31 * Get a copy of terminal transformation (on element)
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34 * @return position of a terminal or null
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36 AffineTransform getTerminalPosition(IElement node, Terminal t);
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39 * Get Terminal direction
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42 * @param directions collection where directions are added (compass direction, 0 + n*360=north, n e N)
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43 * @return true if this handler could tell the terminal direction
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45 boolean getTerminalDirection(IElement node, Terminal t, DirectionSet directions);
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48 * Get shape of a terminal.
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49 * If terminal has a shape its selection is based on it and is zoom-level dependent.
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50 * If a terminal has no shape it is a point and zoom-level independent.
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52 * Only the area that fits into the element will be picked.
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54 * @return shape shape or null
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56 Shape getTerminalShape(IElement node, Terminal t);
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