--- /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.diagram.participant;\r
+\r
+import java.awt.geom.Point2D;\r
+import java.util.ArrayList;\r
+import java.util.Collection;\r
+import java.util.Collections;\r
+import java.util.Comparator;\r
+import java.util.HashMap;\r
+import java.util.List;\r
+import java.util.Map;\r
+\r
+import org.simantics.g2d.canvas.IMouseCaptureContext;\r
+import org.simantics.g2d.canvas.IMouseCaptureHandle;\r
+import org.simantics.g2d.canvas.IMouseCaptureHandleListener;\r
+import org.simantics.g2d.canvas.impl.DependencyReflection.Dependency;\r
+import org.simantics.g2d.diagram.handler.PickContext;\r
+import org.simantics.g2d.diagram.handler.PickRequest;\r
+import org.simantics.g2d.diagram.handler.PickRequest.PickSorter;\r
+import org.simantics.g2d.element.IElement;\r
+import org.simantics.g2d.element.handler.HandleMouseEvent;\r
+import org.simantics.g2d.participant.TransformUtil;\r
+import org.simantics.scenegraph.g2d.events.EventHandlerReflection.EventHandler;\r
+import org.simantics.scenegraph.g2d.events.MouseEvent;\r
+import org.simantics.scenegraph.g2d.events.MouseEvent.MouseEnterEvent;\r
+import org.simantics.scenegraph.g2d.events.MouseEvent.MouseExitEvent;\r
+\r
+/**\r
+ * This participant sends mouse events to elements that have a {@link HandleMouseEvent}\r
+ * handler.\r
+ * \r
+ * @see HandleMouseEvent\r
+ * @author Toni Kalajainen\r
+ */\r
+public class ElementInteractor extends AbstractDiagramParticipant {\r
+\r
+ @Dependency PickContext pick;\r
+ @Dependency TransformUtil util;\r
+\r
+ private PickSorter pickSorter;\r
+ \r
+ public static final int INTERACTOR_PRIORITY = Integer.MAX_VALUE-1;\r
+\r
+ Map<Integer, ElementMouseCaptureHandle> mouseCaptureMap =\r
+ new HashMap<Integer, ElementMouseCaptureHandle>();\r
+ Map<Integer, IElement> mouseFocus = new HashMap<Integer, IElement>();\r
+\r
+ public ElementInteractor() {\r
+ }\r
+\r
+ public ElementInteractor(PickSorter pickSorter) {\r
+ this.pickSorter = pickSorter;\r
+ }\r
+\r
+ private class ElementMouseCaptureHandle implements IMouseCaptureHandle {\r
+ IMouseCaptureHandle origHandle;\r
+ IElement element;\r
+ @Override\r
+ public void addMouseCaptureHandleListener(IMouseCaptureHandleListener listener) {\r
+ origHandle.addMouseCaptureHandleListener(listener);\r
+ }\r
+ @Override\r
+ public int mouseId() {\r
+ return origHandle.mouseId();\r
+ }\r
+ @Override\r
+ public void release() {\r
+ mouseCaptureMap.remove(origHandle.mouseId());\r
+ origHandle.release();\r
+ }\r
+ @Override\r
+ public void removeMouseCaptureHandleListener(IMouseCaptureHandleListener listener) {\r
+ origHandle.removeMouseCaptureHandleListener(listener);\r
+ }\r
+ }\r
+\r
+ /**\r
+ * Capture mouse events to an element.\r
+ * @param element\r
+ * @param mouseId\r
+ * @return capture handle or null if capture is not available in the context\r
+ */\r
+ public IMouseCaptureHandle captureMouse(IElement element, int mouseId)\r
+ {\r
+ // Release old capture\r
+ ElementMouseCaptureHandle prevHnd = mouseCaptureMap.get(mouseId);\r
+ if (prevHnd!=null) {\r
+ prevHnd.release();\r
+ mouseCaptureMap.remove(mouseId);\r
+ }\r
+\r
+ // Check that capture is available\r
+ IMouseCaptureContext mcc = getContext().getMouseCaptureContext();\r
+ if (mcc==null) return null;\r
+\r
+ // make new capture\r
+ ElementMouseCaptureHandle hnd = new ElementMouseCaptureHandle();\r
+ hnd.origHandle = mcc.captureMouse(mouseId);\r
+ hnd.element = element;\r
+ mouseCaptureMap.put(mouseId, hnd);\r
+ return hnd;\r
+ }\r
+\r
+ /**\r
+ * Get all grabs of an element\r
+ * @param e element\r
+ * @return\r
+ */\r
+ public Collection<IMouseCaptureHandle> getGrabsOfElement(IElement e)\r
+ {\r
+ List<IMouseCaptureHandle> result = new ArrayList<IMouseCaptureHandle>();\r
+ for (ElementMouseCaptureHandle eh : mouseCaptureMap.values())\r
+ if (eh.element == e)\r
+ result.add(eh);\r
+ return result;\r
+ }\r
+\r
+ public IMouseCaptureHandle getGrabOfElement(IElement e, int mouseId)\r
+ {\r
+ for (ElementMouseCaptureHandle eh : mouseCaptureMap.values())\r
+ if (eh.element == e && eh.mouseId() == mouseId)\r
+ return eh;\r
+ return null;\r
+ }\r
+\r
+ @EventHandler(priority = INTERACTOR_PRIORITY)\r
+ public boolean handleMouseEvent(MouseEvent me) {\r
+ assertDependencies();\r
+\r
+ // Determine element for capture\r
+ IElement currentFocus = null;\r
+ ElementMouseCaptureHandle hnd = mouseCaptureMap.get(me.mouseId);\r
+ // Mouse is captured\r
+ if (hnd != null) {\r
+ currentFocus = hnd.element;\r
+ //System.out.println("capture: " + hnd);\r
+ } else {\r
+ // Pick element under the mouse\r
+ Point2D controlPos = me.controlPosition;\r
+ Point2D diagramPos = util.controlToCanvas(controlPos, null);\r
+ PickRequest req = new PickRequest(diagramPos);\r
+ req.pickSorter = pickSorter;\r
+ //req.pickSorter = PickRequest.PickSorter.CONNECTIONS_LAST;\r
+ ArrayList<IElement> result = new ArrayList<IElement>();\r
+ pick.pick(diagram, req, result);\r
+ if (result.size()>0) {\r
+ _sortByOrder(result);\r
+ currentFocus = result.get(result.size()-1);\r
+ //System.out.println("Focus " + currentFocus + " " + result.size());\r
+ }\r
+\r
+ }\r
+\r
+ // Send enter & exit events to elements\r
+ IElement prevFocus = mouseFocus.get(me.mouseId);\r
+ // Focus has changed\r
+ if (currentFocus!=prevFocus) {\r
+ if (prevFocus!=null) {\r
+ MouseExitEvent exit = new MouseExitEvent(getContext(), me.time, me.mouseId, me.buttons, me.stateMask, me.controlPosition, me.screenPosition);\r
+ sendElementMouseEvent(prevFocus, exit);\r
+ }\r
+ if (currentFocus!=null) {\r
+ MouseEnterEvent enter = new MouseEnterEvent(getContext(), me.time, me.mouseId, me.buttons, me.stateMask, me.controlPosition, me.screenPosition);\r
+ sendElementMouseEvent(currentFocus, enter);\r
+ }\r
+ }\r
+ mouseFocus.put(me.mouseId, currentFocus);\r
+\r
+ // Send event to all handlers\r
+ if (currentFocus==null) return false;\r
+ //return sendElementMouseEvent(currentFocus, me);\r
+ sendElementMouseEvent(currentFocus, me);\r
+ return false;\r
+ }\r
+\r
+ private boolean sendElementMouseEvent(IElement e, MouseEvent me)\r
+ {\r
+ //System.out.println("sendElementMouseEvent(" + e + ", " + me + ")");\r
+ // FIXME: eating events here will cause DND to not work. Workaround is to not eat the events. Need proper fix.\r
+ for (HandleMouseEvent eh : e.getElementClass().getItemsByClass(HandleMouseEvent.class))\r
+ {\r
+ if (eh.handleMouseEvent(e, getContext(), me)) return false;\r
+ }\r
+ return false;\r
+ }\r
+\r
+ // copy-paste from ZOrderhandler (list is reverse, so element on top is first)\r
+ void _sortByOrder(List<IElement> list)\r
+ {\r
+ List<IElement> elements = diagram.getElements();\r
+ final Map<IElement, Integer> position = new HashMap<IElement, Integer>();\r
+ for (IElement e : list)\r
+ position.put(e, elements.indexOf(e));\r
+ Comparator<IElement> c = new Comparator<IElement>() {\r
+ @Override\r
+ public int compare(IElement o1, IElement o2) {\r
+ int pos1 = position.get(o1);\r
+ int pos2 = position.get(o2);\r
+ return pos1-pos2;\r
+ }\r
+ };\r
+ Collections.sort(list, c);\r
+ }\r
+\r
+}\r
Code Review / simantics / platform.git / blobdiff