在RCP中实现用托拽打开Editor

01 public class EditorAreaDropAdapter extends DropTargetAdapter {
02   private IWorkbenchWindow window;
03   
04   public EditorAreaDropAdapter(IWorkbenchWindow window) {
05     this.window = window;
06   }
07 
08   public void dragEnter(DropTargetEvent event) {
09     // always indicate a copy
10     event.detail = DND.DROP_COPY;
11   }
12 
13   public void dragOperationChanged(DropTargetEvent event) {
14     // always indicate a copy
15     event.detail = DND.DROP_COPY;
16   }
17 
18   public void drop(final DropTargetEvent event) {
19     Display d = window.getShell().getDisplay();
20     final IWorkbenchPage page = window.getActivePage();
21     if (page != null) {
22       d.asyncExec(new Runnable() {
23         public void run() {
24           asyncDrop(event, page);
25         }
26       });
27     }
28   }
29 
30   private void asyncDrop(DropTargetEvent event, IWorkbenchPage page) {
31     if (LocalSelectionTransfer.getInstance().isSupportedType(
32         event.currentDataType)) {
33       StructuredSelection selection = (StructuredSelection) event.data;
34       for (Iterator iter = selection.iterator(); iter.hasNext();) {
35         Object o = iter.next();
36         if (o instanceof Record) {
37           IEditorInput input = new RecordEditorInput((Record) o);
38           try {
39             page.openEditor(input, RecordEditor.ID);
40           } catch (Exception e) {
41             PwdgatePlugin.log("open ediotr RecordEditor", e);
42           }
43         } else if (o instanceof Group) {
44           IEditorInput input = new GroupEditorInput((Group) o);
45           try {
46             page.openEditor(input, GroupEditor.ID);
47           } catch (PartInitException e) {
48             PwdgatePlugin.log("open ediotr GroupEditor", e);
49           }
50         }
51       }
52     }
53   }
54 }
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01 public class LocalSelectionDragAdapter extends DragSourceAdapter {
02 
03   ISelectionProvider selectionProvider;
04 
05   public LocalSelectionDragAdapter(ISelectionProvider provider) {
06     selectionProvider = provider;
07   }
08 
09   public void dragFinished(DragSourceEvent event) {
10     // TODO Auto-generated method stub
11     super.dragFinished(event);
12     System.out
13         .println("DragSourceListener.dragFinished(DragSourceEvent event)");
14   }
15 
16   public void dragSetData(DragSourceEvent event) {
17     System.out
18         .println("DragSourceListener.dragSetData(DragSourceEvent event)");
19     DragSource dragSource = (DragSource) event.widget;
20     Control control = dragSource.getControl();
21     if (control != control.getDisplay().getFocusControl()) {
22       event.doit = false;
23       return;
24     }
25 
26     IStructuredSelection selection = (IStructuredSelection) selectionProvider
27         .getSelection();
28 
29     if (selection.isEmpty()) {
30       event.doit = false;
31       return;
32     }
33     LocalSelectionTransfer.getInstance().setSelection(selection);
34     event.doit = true;
35   }
36 
37   public void dragStart(DragSourceEvent event) {
38     System.out
39         .println("DragSourceListener.dragStart(DragSourceEvent event)");
40   }
41 }
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