--- /dev/null
+/*******************************************************************************\r
+ * Copyright (c) 2007- VTT Technical Research Centre of Finland.\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.proconf.g3d.dnd;\r
+\r
+import java.util.ArrayList;\r
+import java.util.List;\r
+\r
+import org.eclipse.swt.dnd.DND;\r
+import org.eclipse.swt.dnd.DropTarget;\r
+import org.eclipse.swt.dnd.DropTargetEvent;\r
+import org.eclipse.swt.dnd.DropTargetListener;\r
+import org.eclipse.swt.dnd.TextTransfer;\r
+import org.eclipse.swt.dnd.Transfer;\r
+import org.eclipse.swt.dnd.TransferData;\r
+import org.eclipse.swt.graphics.Point;\r
+import org.eclipse.swt.widgets.Control;\r
+import org.simantics.db.Resource;\r
+import org.simantics.proconf.g3d.base.ThreeDimensionalEditorBase;\r
+import org.simantics.proconf.g3d.common.StructuredResourceSelection;\r
+import org.simantics.proconf.ui.dnd.ResourceReferenceTransfer;\r
+\r
+public class ShapeDropTarget implements DropTargetListener{\r
+ ThreeDimensionalEditorBase editor;\r
+ List<DropListener> listeners;\r
+ final Control control;\r
+ private DropTarget target; \r
+ \r
+ public ShapeDropTarget(ThreeDimensionalEditorBase editor) {\r
+ this.editor = editor;\r
+ listeners = new ArrayList<DropListener>();\r
+ this.control = editor.getRenderingComposite();\r
+ \r
+ target = new DropTarget(control, DND.DROP_LINK);\r
+ target.setTransfer(new Transfer[] { ResourceReferenceTransfer.getInstance() });\r
+ target.addDropListener(this); \r
+ }\r
+ \r
+ public void addDropListener(DropListener listener) {\r
+ listeners.add(listener);\r
+ }\r
+ \r
+ public void removeDropListener(DropListener listener) {\r
+ listeners.remove(listener);\r
+ }\r
+ \r
+ @Override\r
+ public void dragEnter(DropTargetEvent event) {\r
+ event.detail = DND.DROP_LINK;\r
+ dragOver(event);\r
+ }\r
+ \r
+ public void dragOperationChanged(DropTargetEvent event) {\r
+ }\r
+ \r
+ public void dropAccept(DropTargetEvent event) {\r
+ }\r
+ \r
+ public void dragLeave(DropTargetEvent event) {\r
+ }\r
+\r
+ \r
+ @Override\r
+ public void dragOver(DropTargetEvent event) {\r
+ // FIXME : a hack to get the actual data (probably works only in Windows)\r
+ TransferData data = event.currentDataType;\r
+ if(!TextTransfer.getInstance().isSupportedType(data))\r
+ return;\r
+ Object o = TextTransfer.getInstance().nativeToJava(data);\r
+ \r
+ Point p = getLocalCoords(event);\r
+ editor.getInputProvider().setMouseMoved(true);\r
+ editor.getInputProvider().setMouseX(p.x);\r
+ editor.getInputProvider().setMouseY(p.y);\r
+ editor.run();\r
+ StructuredResourceSelection sel = editor.getSelectionAdapter().getHighlightSelection();\r
+ \r
+ event.data = o;\r
+ Resource ids[] = parseEventData(event);\r
+ for (DropListener l : listeners) {\r
+ if(l.acceptDrop(sel, ids)) {\r
+ event.detail = DND.DROP_LINK;\r
+ return;\r
+ }\r
+ }\r
+ event.detail = DND.DROP_NONE; \r
+ }\r
+ \r
+ @Override\r
+ public void drop(DropTargetEvent event) {\r
+ StructuredResourceSelection sel = editor.getSelectionAdapter().getHighlightSelection();\r
+ Resource ids[] = parseEventData(event);\r
+ for (DropListener l : listeners) {\r
+ if(l.acceptDrop(sel, ids)) {\r
+ l.doDrop(sel, ids);\r
+ return;\r
+ }\r
+ }\r
+ }\r
+ \r
+ protected Point getLocalCoords(DropTargetEvent event) {\r
+ return editor.getRenderingComposite().toControl(event.x, event.y);\r
+ }\r
+ \r
+ public void dispose()\r
+ {\r
+ target.removeDropListener(this);\r
+ target = null;\r
+ }\r
+ \r
+ private Resource[] parseEventData(DropTargetEvent event) {\r
+ if (ResourceReferenceTransfer.getInstance().isSupportedType(event.currentDataType) && (event.data instanceof Resource[])) {\r
+ return (Resource[]) event.data;\r
+ }\r
+ return null;\r
+ }\r
+}\r