git-svn-id: https://www.simantics.org/svn/simantics/3d/trunk@22280 ac1ea38d-2e2b...

[simantics/3d.git] / org.simantics.g3d / src / org / simantics / proconf / g3d / dnd / ShapeDropTarget.java

diff --git a/org.simantics.g3d/src/org/simantics/proconf/g3d/dnd/ShapeDropTarget.java b/org.simantics.g3d/src/org/simantics/proconf/g3d/dnd/ShapeDropTarget.java
new file mode 100644 (file)
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+++ b/org.simantics.g3d/src/org/simantics/proconf/g3d/dnd/ShapeDropTarget.java
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+/*******************************************************************************\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