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| 14. 112. 5. 实施DragGestureListener |
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import java.awt.Cursor;
import java.awt.datatransfer.DataFlavor;
import java.awt.datatransfer.Transferable;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragGestureEvent;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.DragSource;
import javax.swing.JFrame;
import javax.swing.JLabel;
public class DragGesture extends JFrame implements DragGestureListener, Transferable {
public DragGesture() {
setTitle("Drag Gesture");
JLabel left = new JLabel("text");
DragSource ds = new DragSource();
ds.createDefaultDragGestureRecognizer(left, DnDConstants.ACTION_COPY, this);
add(left);
pack();
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
setVisible(true);
}
public void dragGestureRecognized(DragGestureEvent event) {
Cursor cursor = null;
if (event.getDragAction() == DnDConstants.ACTION_COPY) {
cursor = DragSource.DefaultCopyDrop;
}
event.startDrag(cursor, this);
}
public Object getTransferData(DataFlavor flavor) {
return null;
}
public DataFlavor[] getTransferDataFlavors() {
return new DataFlavor[0];
}
public boolean isDataFlavorSupported(DataFlavor flavor) {
return false;
}
public static void main(String[] args) {
new DragGesture();
}
}
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