急！关于鼠标拖放问题，分不够再加

[dgsrest]

最好给个Demo的详细代码

[207]

java.awt.dnd和java.awt.datatransfer包是支持鼠标的拖放交换程序的数据的功能的

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文件1：
package jdraganddropdemo;

import javax.swing.JLabel;
import java.awt.dnd.DragGestureEvent;
import java.awt.dnd.DragGestureListener;
import java.awt.dnd.*;
import java.awt.datatransfer.*;

class DragJLabel extends JLabel implements DragGestureListener, DragSourceListener {

DragSource ds = DragSource.getDefaultDragSource();


public DragJLabel(String title,int alignment){
super(title,alignment);

int action = DnDConstants.ACTION_COPY_OR_MOVE;
ds.createDefaultDragGestureRecognizer(this,action,this);



}
public void dragGestureRecognized(DragGestureEvent dge) {
/**@todo Implement this java.awt.dnd.DragGestureListener method*/
//throw new java.lang.UnsupportedOperationException("Method dragGestureRecognized() not yet implemented.");
try{
Transferable tr = new StringSelection(this.getText());
dge.startDrag(DragSource.DefaultCopyNoDrop,tr,this);
}catch(Exception err){
err.printStackTrace();
}
}
public void dragEnter(DragSourceDragEvent dsde) {
/**@todo Implement this java.awt.dnd.DragSourceListener method*/
//throw new java.lang.UnsupportedOperationException("Method dragEnter() not yet implemented.");
DragSourceContext dsc = dsde.getDragSourceContext();
int action = dsde.getDropAction();
if ((action&DnDConstants.ACTION_COPY)!=0)
dsc.setCursor(DragSource.DefaultCopyDrop);
else
dsc.setCursor(DragSource.DefaultCopyNoDrop);
}
public void dragOver(DragSourceDragEvent dsde) {
/**@todo Implement this java.awt.dnd.DragSourceListener method*/
//throw new java.lang.UnsupportedOperationException("Method dragOver() not yet implemented.");
}
public void dropActionChanged(DragSourceDragEvent dsde) {
/**@todo Implement this java.awt.dnd.DragSourceListener method*/
//throw new java.lang.UnsupportedOperationException("Method dropActionChanged() not yet implemented.");
}
public void dragExit(DragSourceEvent dse) {
/**@todo Implement this java.awt.dnd.DragSourceListener method*/
//throw new java.lang.UnsupportedOperationException("Method dragExit() not yet implemented.");
}
public void dragDropEnd(DragSourceDropEvent dsde) {
/**@todo Implement this java.awt.dnd.DragSourceListener method*/
//throw new java.lang.UnsupportedOperationException("Method dragDropEnd() not yet implemented.");
if (!dsde.getDropSuccess())
return;
// int action = dsde.getDropAction();
//if ((action&DnDConstants.ACTION_MOVE)!=0)
// this.setText("");
}
}

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文件2：
package jdraganddropdemo;

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.awt.datatransfer.*;
import java.awt.dnd.*;

public class MainFrame extends JFrame implements DropTargetListener {
private JPanel contentPane;
private BorderLayout borderLayout1 = new BorderLayout();
private JTextField jTextField1 = new JTextField();

DragJLabel label = new DragJLabel("Hello World !",SwingConstants.CENTER);


//Construct the frame
public MainFrame() {
enableEvents(AWTEvent.WINDOW_EVENT_MASK);
try {
jbInit();
}
catch(Exception e) {
e.printStackTrace();
}
}
//Component initialization
private void jbInit() throws Exception {
//setIconImage(Toolkit.getDefaultToolkit().createImage(MainFrame.class.getResource("[Your Icon]")));
contentPane = (JPanel) this.getContentPane();
contentPane.setLayout(borderLayout1);
this.setSize(new Dimension(410, 114));
this.setTitle("JDragAndDropDemo");
jTextField1.setFont(new java.awt.Font("Dialog", 0, 14));
contentPane.add(jTextField1, BorderLayout.SOUTH);
contentPane.add(this.label,BorderLayout.NORTH);

new DropTarget(this.jTextField1,DnDConstants.ACTION_COPY_OR_MOVE,this);
}
//Overridden so we can exit when window is closed
protected void processWindowEvent(WindowEvent e) {
super.processWindowEvent(e);
if (e.getID() == WindowEvent.WINDOW_CLOSING) {
System.exit(0);
}
}
public void dragEnter(DropTargetDragEvent dtde) {
/**@todo Implement this java.awt.dnd.DropTargetListener method*/
//throw new java.lang.UnsupportedOperationException("Method dragEnter() not yet implemented.");
}
public void dragOver(DropTargetDragEvent dtde) {
/**@todo Implement this java.awt.dnd.DropTargetListener method*/
//throw new java.lang.UnsupportedOperationException("Method dragOver() not yet implemented.");
}
public void dropActionChanged(DropTargetDragEvent dtde) {
/**@todo Implement this java.awt.dnd.DropTargetListener method*/
//throw new java.lang.UnsupportedOperationException("Method dropActionChanged() not yet implemented.");
}
public void dragExit(DropTargetEvent dte) {
/**@todo Implement this java.awt.dnd.DropTargetListener method*/
//throw new java.lang.UnsupportedOperationException("Method dragExit() not yet implemented.");
}
public void drop(DropTargetDropEvent dtde) {
/**@todo Implement this java.awt.dnd.DropTargetListener method*/
//throw new java.lang.UnsupportedOperationException("Method drop() not yet implemented.");
try{
Transferable tr = dtde.getTransferable();
if (dtde.isDataFlavorSupported(DataFlavor.stringFlavor)){
dtde.acceptDrop(dtde.getDropAction());
String s = (String) tr.getTransferData(DataFlavor.stringFlavor);
this.jTextField1.setText(this.jTextField1.getText()+s);
dtde.dropComplete(true);
}else{
dtde.rejectDrop();

}
}catch(Exception err){
err.printStackTrace();
}
}
}

[dgsrest]

好像不行啊????

[207]

不能连续回复大于3次
第三个文件：
package jdraganddropdemo;

import javax.swing.UIManager;
import java.awt.*;

public class JDragAndDropDemo {
private boolean packFrame = false;

//Construct the application
public JDragAndDropDemo() {
MainFrame frame = new MainFrame();
//Validate frames that have preset sizes
//Pack frames that have useful preferred size info, e.g. from their layout
if (packFrame) {
frame.pack();
}
else {
frame.validate();
}
//Center the window
Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
Dimension frameSize = frame.getSize();
if (frameSize.height > screenSize.height) {
frameSize.height = screenSize.height;
}
if (frameSize.width > screenSize.width) {
frameSize.width = screenSize.width;
}
frame.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);
frame.setVisible(true);
}
//Main method
public static void main(String[] args) {
/* try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
}
catch(Exception e) {
e.printStackTrace();
}
*/ new JDragAndDropDemo();
}
}

[IEQQ]

关注ing！！！！！！！

[dgsrest]

好啦，谢谢了