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.impl;
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14 import java.awt.geom.Point2D;
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15 import java.lang.reflect.Method;
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16 import java.util.Map;
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18 import org.simantics.g2d.canvas.ICanvasContext;
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19 import org.simantics.g2d.diagram.participant.DiagramParticipant;
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20 import org.simantics.g2d.element.ElementUtils;
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21 import org.simantics.g2d.element.IElement;
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22 import org.simantics.g2d.element.handler.Clickable;
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23 import org.simantics.scenegraph.g2d.events.MouseEvent;
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24 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseButtonReleasedEvent;
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25 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseDragBegin;
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26 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseExitEvent;
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27 import org.simantics.utils.datastructures.hints.IHintContext.Key;
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28 import org.simantics.utils.datastructures.hints.IHintContext.KeyOf;
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29 import org.simantics.utils.threads.Executable;
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30 import org.simantics.utils.threads.IThreadWorkQueue;
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31 import org.simantics.utils.threads.SyncListenerList;
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32 import org.simantics.utils.threads.ThreadUtils;
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35 * Base implementation for button handlers
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38 * @author Toni Kalajainen
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40 public abstract class AbstractClickable extends AbstractGrabbable implements Clickable {
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42 private static final long serialVersionUID = -8329973386869163106L;
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44 public static Key HOVER_KEY = new KeyOf(Boolean.class, "HOVER");
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45 public static Key PRESS_STATUS_KEY = new KeyOf(PressStatus.class, "PRESS_STATUS");
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47 public AbstractClickable(Double strayDistance) {
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51 public AbstractClickable() {
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56 * Get element press status
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61 public PressStatus getPressStatus(IElement e, ICanvasContext ctx)
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63 Map<Integer, GrabInfo> gis = getGrabs(e, ctx);
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64 if (gis==null || gis.size()==0) {
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65 Boolean hover = e.getHint(HOVER_KEY);
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66 if (hover != null && hover)
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67 return PressStatus.HOVER;
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68 return PressStatus.NORMAL;
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72 boolean held = false;
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73 boolean pressing = false;
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75 for (GrabInfo gi : gis.values()) {
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77 pressing |= onPickCheck(e, ctx, gi.pointerId, gi.dragPosElement);
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78 if (pressing) break;
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81 if (pressing) return PressStatus.PRESSED;
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82 if (held) return PressStatus.HELD;
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83 Boolean hover = e.getHint(HOVER_KEY);
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84 if (hover != null && hover)
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85 return PressStatus.HOVER;
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87 return PressStatus.NORMAL;
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92 public boolean handleMouseEvent(IElement e, ICanvasContext ctx,
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94 //System.out.println("AbstractClickable.hME element:" + e + " me:" + me);
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95 boolean b = super.handleMouseEvent(e, ctx, me);
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97 // DND drag starts causes DragBegin + ButtonReleasedEvents, and hovering must be set false
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98 if (!(me instanceof MouseExitEvent || me instanceof MouseDragBegin || me instanceof MouseButtonReleasedEvent))
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99 hovering = Boolean.valueOf(onPickCheck(e, ctx, me.mouseId, ElementUtils.controlToElementCoordinate(e, ctx, me.controlPosition, null)));
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102 if (!hovering.equals(e.getHint(HOVER_KEY))) {
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103 e.setHint(HOVER_KEY, hovering);
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107 PressStatus newStatus = getPressStatus(e, ctx);
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108 if (!newStatus.equals(e.getHint(PRESS_STATUS_KEY)))
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109 e.setHint(PRESS_STATUS_KEY, newStatus) ;
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114 protected void onDrag(GrabInfo gi, ICanvasContext ctx) {
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119 protected void onGrab(GrabInfo gi, ICanvasContext ctx) {
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123 protected void onGrabCancel(GrabInfo gi, ICanvasContext ctx) {
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127 protected void onRelease(GrabInfo gi, ICanvasContext ctx) {
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128 // pick is pick until last mouse releases
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129 if (getGrabCount(gi.e, ctx)>0) return;
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131 boolean pick = onPickCheck(gi.e, ctx, gi.pointerId, gi.dragPosElement);
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133 onClicked(gi, ctx);
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134 fireClicked(gi.e, ctx);
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138 protected boolean onGrabCheck(IElement e, ICanvasContext ctx, int pointerId, Point2D pickPos)
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140 Point2D elementPos = ElementUtils.controlToElementCoordinate(e, ctx, pickPos, null);
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141 return onPickCheck(e, ctx, pointerId, elementPos);
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144 protected abstract void onClicked(GrabInfo gi, ICanvasContext ctx);
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147 * Pick check in element coordinates
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154 protected abstract boolean onPickCheck(IElement e, ICanvasContext ctx, int pointerId, Point2D pickPos);
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157 private static final Key KEY_CLICK_LISTENERS = new KeyOf(SyncListenerList.class);
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160 public void addListener(final IElement e, final ICanvasContext ctx, final IThreadWorkQueue thread, final ClickListener listener) {
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161 ThreadUtils.syncExec(ctx.getThreadAccess(), new Runnable() {
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163 public void run() {
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164 DiagramParticipant dp = ctx.getSingleItem(DiagramParticipant.class);
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165 SyncListenerList<ClickListener> list = dp.getElementHint(e, KEY_CLICK_LISTENERS);
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167 list = new SyncListenerList<ClickListener>(ClickListener.class);
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168 dp.setElementHint(e, KEY_CLICK_LISTENERS, list);
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170 list.add(thread, listener);
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175 public void removeListener(final IElement e, final ICanvasContext ctx, final IThreadWorkQueue thread, final ClickListener listener) {
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176 ThreadUtils.syncExec(ctx.getThreadAccess(), new Runnable() {
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178 public void run() {
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179 DiagramParticipant dp = ctx.getSingleItem(DiagramParticipant.class);
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180 SyncListenerList<ClickListener> list = dp.getElementHint(e, KEY_CLICK_LISTENERS);
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181 if (list==null) return;
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182 list.remove(thread, listener);
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183 if (list.isEmpty())
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184 dp.removeElementHint(e, KEY_CLICK_LISTENERS);
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188 private final static Method onClick = SyncListenerList.getMethod(ClickListener.class, "onClick");
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189 public void fireClicked(IElement e, ICanvasContext ctx)
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191 DiagramParticipant dp = ctx.getSingleItem(DiagramParticipant.class);
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192 SyncListenerList<ClickListener> list = dp.getElementHint(e, KEY_CLICK_LISTENERS);
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193 if (list==null) return;
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194 Executable exes[] = list.getExecutables(onClick, e, ctx);
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195 ThreadUtils.multiSyncExec(exes);
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