treeviewer的拖放操作

Question

在treeviewer中怎么将一个节点拖到另外一个节点，变成另外一个节点的子节点！

Answer 1

已经知道答案了final Transfer[] transfer=new Transfer[]{LocalSelectionTransfer.getTransfer()};

treeViewer.addDragSupport(DND.DROP_MOVE, transfer, new DragSourceAdapter (){ @Override
public void dragSetData(DragSourceEvent event) {
// TODO Auto-generated method stub ((LocalSelectionTransfer)transfer[0]).setSelection((IStructuredSelection)treeViewer.getSelection());
event.data=((IStructuredSelection)treeViewer.getSelection()).getFirstElement();
event.doit = true;
} @Override
public void dragFinished(DragSourceEvent event) {
// TODO Auto-generated method stub
} @Override
public void dragStart(DragSourceEvent event) {
// TODO Auto-generated method stub

}
});
treeViewer.addDropSupport(DND.DROP_MOVE, transfer, new ViewerDropAdapter(treeViewer){ @Override
public boolean performDrop(Object data) {
// TODO Auto-generated method stub
getCurrentLocation();
Element element=(Element)getCurrentTarget();
IStructuredSelection selection=(IStructuredSelection)data;
Element elemented=(Element)selection.getFirstElement();
System.out.println("element:"+element.getAttribute("name"));
System.out.println("drop:"+elemented.getAttribute("name"));
element.appendChild(elemented);
treeViewer.refresh();
return true;
} @Override
public boolean validateDrop(Object target, int operation,
TransferData transferType) {
// TODO Auto-generated method stub
return true;
}
});

Answer 2

// TODO Auto-generated method stub                ((LocalSelectionTransfer)transfer[0]).setSelection((IStructuredSelection)treeViewer.getSelection());
这个要这样的
// TODO Auto-generated method stub                
((LocalSelectionTransfer)transfer[0]).setSelection((IStructuredSelection)treeViewer.getSelection());

Answer 3

用ExtJs吧，我就是因为树接点才学这个的。