請問：如何使得JLabel支援drag？而JTextComponent類的元件僅需SetDragEnabled即可

zhanghongliang發表於2005-06-03
元件
我寫了一個類繼承自JLabel，但實現DragSourceListener, DragGestureListener介面，可是測試時好像不能支援drag，急問原因？？？？

class DraggableLabel extends JLabel
implements DragSourceListener, DragGestureListener {
public DraggableLabel(Icon image) {
super(image);
}

public DraggableLabel(String text) {
super(text);
dragSource = new DragSource();
dragSource.createDefaultDragGestureRecognizer(this,
DnDConstants.ACTION_COPY, this);
}

public void dragEnter(DragSourceDragEvent dsde) {
}

public void dragOver(DragSourceDragEvent dsde) {
}

public void dropActionChanged(DragSourceDragEvent dsde) {
}

public void dragExit(DragSourceEvent dse) {
}

public void dragDropEnd(DragSourceDropEvent dsde) {
}

/**
* a drag gesture has been initiated
*/
public void dragGestureRecognized(DragGestureEvent event) {
Transferable transfer = event.getTransferable();
dragSource.startDrag(event, DragSource.DefaultMoveDrop, transfer, this);
}

private DragSource dragSource = null;
}

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