--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007, 2010 Association for Decentralized Information Management\r
+ * in Industry THTH ry.\r
+ * All rights reserved. This program and the accompanying materials\r
+ * are made available under the terms of the Eclipse Public License v1.0\r
+ * which accompanies this distribution, and is available at\r
+ * http://www.eclipse.org/legal/epl-v10.html\r
+ *\r
+ * Contributors:\r
+ * VTT Technical Research Centre of Finland - initial API and implementation\r
+ *******************************************************************************/\r
+package org.simantics.g2d.participant;\r
+\r
+import java.awt.geom.Point2D;\r
+import java.util.HashMap;\r
+import java.util.Map;\r
+\r
+import org.simantics.g2d.canvas.impl.AbstractCanvasParticipant;\r
+import org.simantics.g2d.canvas.impl.DependencyReflection.Dependency;\r
+\r
+/**\r
+ * Participant that enables grabbing of canvas.\r
+ * \r
+ * @See {@link HandPainter} Paints grabbing of canvas\r
+ * @author Toni Kalajainen\r
+ */\r
+public class CanvasGrab extends AbstractCanvasParticipant {\r
+\r
+ @Dependency TransformUtil util;\r
+ \r
+ public Map<Integer, PointerInfo> grabInfo = new HashMap<Integer, PointerInfo>();\r
+ \r
+ public PointerInfo grabCanvas(int id, Point2D pos)\r
+ { \r
+ PointerInfo result = new PointerInfo(pos, id);\r
+ result.currentPos = pos; \r
+ grabInfo.put(id, result); \r
+ return result;\r
+ }\r
+ \r
+ public void releaseCanvas(int id)\r
+ {\r
+ grabInfo.remove(id);\r
+ }\r
+ \r
+ /** Info of pointers with left button down */\r
+ public static final class PointerInfo {\r
+ public final int mouseId;\r
+ // Anchoring position in control coordinates \r
+ public Point2D anchorPos;\r
+ public Point2D currentPos;\r
+ public PointerInfo(Point2D anchorPos, int mouseId) {\r
+ this.anchorPos = anchorPos;\r
+ this.mouseId = mouseId;\r
+ } \r
+ }\r
+ \r
+ public Map<Integer, PointerInfo> getGrabInfo()\r
+ {\r
+ return grabInfo;\r
+ }\r
+ \r
+}\r