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 org.simantics.g2d.canvas.ICanvasContext;
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15 import org.simantics.g2d.element.IElement;
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16 import org.simantics.g2d.element.handler.impl.AbstractClickable;
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17 import org.simantics.g2d.element.handler.impl.ClickableImpl;
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18 import org.simantics.utils.threads.IThreadWorkQueue;
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24 * @See {@link ClickableImpl}
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25 * @See {@link AbstractClickable}
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26 * @author Toni Kalajainen
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28 public interface Clickable extends ElementHandler {
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30 public static final ClickableImpl INSTANCE = ClickableImpl.INSTANCE;
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32 // TODO PressStatus should be a variable of the viewport, not the diagram
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33 public static enum PressStatus {
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34 NORMAL, // not pressed
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35 HOVER, // not pressed but mouse is hovering over the element
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36 HELD, // pressed but mouse is not hovering over the element
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37 PRESSED // pressed and mouse is hovering over the element
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40 public interface ClickListener {
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41 void onClick(IElement e, ICanvasContext ctx);
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44 PressStatus getPressStatus(IElement e, ICanvasContext ctx);
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46 // IMPL Note! Invocation must be thread safe (canvas thread is not guaranteed)
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47 void addListener(IElement e, ICanvasContext ctx, IThreadWorkQueue thread, ClickListener listener);
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49 // IMPL Note! Invocation must be thread safe (canvas thread is not guaranteed)
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50 void removeListener(IElement e, ICanvasContext ctx, IThreadWorkQueue thread, ClickListener listener);
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