bundles/org.simantics.g2d/src/org/simantics/g2d/participant/PointerPainter.java

   1 /*******************************************************************************
   2  * Copyright (c) 2007, 2010 Association for Decentralized Information Management
   3  * in Industry THTH ry.
   4  * All rights reserved. This program and the accompanying materials
   5  * are made available under the terms of the Eclipse Public License v1.0
   6  * which accompanies this distribution, and is available at
   7  * http://www.eclipse.org/legal/epl-v10.html
   8  *
   9  * Contributors:
  10  *     VTT Technical Research Centre of Finland - initial API and implementation
  11  *******************************************************************************/
  12 package org.simantics.g2d.participant;
  13
  14 import java.awt.BasicStroke;
  15 import java.awt.Color;
  16 import java.awt.Paint;
  17 import java.awt.Shape;
  18 import java.awt.Stroke;
  19 import java.awt.geom.AffineTransform;
  20 import java.awt.geom.Path2D;
  21 import java.util.Map;
  22
  23 import org.simantics.g2d.canvas.SGDesignation;
  24 import org.simantics.g2d.canvas.impl.AbstractCanvasParticipant;
  25 import org.simantics.g2d.canvas.impl.DependencyReflection.Dependency;
  26 import org.simantics.g2d.canvas.impl.SGNodeReflection.SGCleanup;
  27 import org.simantics.g2d.canvas.impl.SGNodeReflection.SGInit;
  28 import org.simantics.g2d.participant.MouseUtil.MouseInfo;
  29 import org.simantics.scenegraph.g2d.G2DParentNode;
  30 import org.simantics.scenegraph.g2d.events.MouseEvent;
  31 import org.simantics.scenegraph.g2d.events.EventHandlerReflection.EventHandler;
  32 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseButtonPressedEvent;
  33 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseButtonReleasedEvent;
  34 import org.simantics.scenegraph.g2d.events.MouseEvent.MouseMovedEvent;
  35 import org.simantics.scenegraph.g2d.nodes.InstancingShapeNode;
  36 import org.simantics.utils.datastructures.hints.IHintContext.Key;
  37 import org.simantics.utils.datastructures.hints.IHintContext.KeyOf;
  38
  39 /**
  40  * Paints mouse cursors in a multi-mouse setup.
  41  *
  42  * @author Toni Kalajainen
  43  * @author Tuukka Lehtonen
  44  */
  45 public class PointerPainter extends AbstractCanvasParticipant {
  46
  47     /**
  48      * Key for the hint that determines whether cursors are painter or not.
  49      */
  50     public static final Key     KEY_PAINT_POINTER     = new KeyOf(Boolean.class);
  51
  52     public static final int     CURSOR_PAINT_Z_ORDER = 5000;
  53
  54     private final static Stroke CURSOR_STROKE         = new BasicStroke(1.0f);
  55
  56     @Dependency MouseUtil       monitor;
  57
  58     InstancingShapeNode         node;
  59
  60     Shape                       pointer;
  61
  62     public PointerPainter() {
  63         Path2D p = new Path2D.Double();
  64         p.moveTo(-10, -10);
  65         p.lineTo(10, 10);
  66         p.moveTo(10, -10);
  67         p.lineTo(-10, 10);
  68
  69         this.pointer = p;
  70     }
  71
  72     @SGInit(designation = SGDesignation.CONTROL)
  73     public void init(G2DParentNode parent) {
  74         node = parent.addNode("pointers", InstancingShapeNode.class);
  75         node.setZIndex(CURSOR_PAINT_Z_ORDER);
  76         node.setShape(pointer);
  77         node.setStroke(CURSOR_STROKE);
  78         node.setFill(false);
  79         node.setScaleStroke(false);
  80         node.setScaleShape(false);
  81     }
  82
  83     @SGCleanup
  84     public void cleanup() {
  85         node.remove();
  86         node = null;
  87     }
  88
  89     public boolean isCursorEnabled() {
  90         Boolean pp = getHint(KEY_PAINT_POINTER);
  91         return Boolean.TRUE.equals(pp);
  92     }
  93
  94     @EventHandler(priority = Integer.MAX_VALUE)
  95     public boolean handleMouseEvent(MouseEvent e) {
  96         if (!isCursorEnabled())
  97             return false;
  98
  99         assertDependencies();
 100
 101         if (e instanceof MouseMovedEvent || e instanceof MouseButtonPressedEvent
 102                 || e instanceof MouseButtonReleasedEvent) {
 103             updateNode();
 104             setDirty();
 105         }
 106         return false;
 107     }
 108
 109     private void updateNode() {
 110         Map<Integer, MouseInfo> miceInfo = monitor.getMiceInfo();
 111
 112         AffineTransform[] transforms = new AffineTransform[miceInfo.size()];
 113         Paint[] paints = new Paint[miceInfo.size()];
 114
 115         int i = 0;
 116         for (MouseInfo mi : miceInfo.values()) {
 117             int color = 0;
 118             if ((mi.buttons & 1) > 0) color |= 0xff;
 119             if ((mi.buttons & 2) > 0) color |= 0xff00;
 120             if ((mi.buttons & 4) > 0) color |= 0xff0000;
 121
 122             transforms[i] = AffineTransform.getTranslateInstance(mi.controlPosition.getX(), mi.controlPosition.getY());
 123             paints[i] = new Color(color);
 124
 125             ++i;
 126         }
 127
 128         node.setInstances(transforms, paints);
 129     }
 130
 131 }