|
/*
Java Swing, 2nd Edition
By Marc Loy, Robert Eckstein, Dave Wood, James Elliott, Brian Cole
ISBN: 0-596-00408-7
Publisher: O'Reilly
*/
// DragTest.java
//A simple (?) test of the DragSource classes to see if we
//can create a draggable object in a Java application. This version
//works with 1.3 and higher SDKs.
//
import java.awt.BorderLayout;
import java.awt.datatransfer.StringSelection;
import java.awt.dnd.DnDConstants;
import java.awt.dnd.DragGestureEvent;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.DragGestureRecognizer;
import java.awt.dnd.DragSource;
import java.awt.dnd.DragSourceDragEvent;
import java.awt.dnd.DragSourceDropEvent;
import java.awt.dnd.DragSourceEvent;
import java.awt.dnd.DragSourceListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JFrame;
import javax.swing.JList;
import javax.swing.JScrollPane;
import javax.swing.ListSelectionModel;
public class DragTest extends JFrame implements DragSourceListener,
DragGestureListener {
DragSource ds;
JList jl;
StringSelection transferable;
String[] items = { "Java", "C", "C++", "Lisp", "Perl", "Python" };
public DragTest() {
super("Drag Test");
setSize(200, 150);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent we) {
System.exit(0);
}
});
jl = new JList(items);
jl.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
getContentPane().add(new JScrollPane(jl), BorderLayout.CENTER);
ds = new DragSource();
DragGestureRecognizer dgr = ds.createDefaultDragGestureRecognizer(jl,
DnDConstants.ACTION_COPY, this);
setVisible(true);
}
public void dragGestureRecognized(DragGestureEvent dge) {
System.out.println("Drag Gesture Recognized!");
transferable = new StringSelection(jl.getSelectedValue().toString());
ds.startDrag(dge, DragSource.DefaultCopyDrop, transferable, this);
}
public void dragEnter(DragSourceDragEvent dsde) {
System.out.println("Drag Enter");
}
public void dragExit(DragSourceEvent dse) {
System.out.println("Drag Exit");
}
public void dragOver(DragSourceDragEvent dsde) {
System.out.println("Drag Over");
}
public void dragDropEnd(DragSourceDropEvent dsde) {
System.out.print("Drag Drop End: ");
if (dsde.getDropSuccess()) {
System.out.println("Succeeded");
} else {
System.out.println("Failed");
}
}
public void dropActionChanged(DragSourceDragEvent dsde) {
System.out.println("Drop Action Changed");
}
public static void main(String args[]) {
new DragTest();
}
}
|
