drag n drop overwriting JLabel
Hi,
can anyone shed some light on this please.....
I have successfully set up drag and drop, dragging text from JLabel into JTextArea which works fine. If you drag the text over another JLabel it overwrites the JLAbel text - how do I stop this?
I have tried using JTextArea's instead and .setEditable(false) but it doesn't make a difference.
The JLabels have .setTransferHandler(new TransferHandler("text")) is this the problem and if so how do I solve it?
I have searched through the Swing tutorial and found no answers.
All advice would be REALLY appreciated.
Cheers.
[620 byte] By [
smoom78a] at [2007-11-27 6:09:54]
# 1
import java.awt.*;
import java.awt.datatransfer.*;
import java.awt.event.*;
import javax.swing.*;
public class DragNoDrop {
private JPanel getContent() {
JLabel dropEnabled = new JLabel("drag and drop enabled");
dropEnabled.setBorder(BorderFactory.createEtchedBorder());
dropEnabled.setTransferHandler(new TransferHandler("text"));
dropEnabled.addMouseListener(ml);
JLabel noDrop = new JLabel("drop not enabled");
noDrop.setBorder(BorderFactory.createEtchedBorder());
noDrop.setTransferHandler(new TransferHandler("text") {
public boolean canImport(JComponent comp, DataFlavor[] transferFlaors) {
return false;
}
});
noDrop.addMouseListener(ml);
JTextField textField = new JTextField("hello world", 12);
textField.setDragEnabled(true);
dropEnabled.setPreferredSize(textField.getPreferredSize());
noDrop.setPreferredSize(textField.getPreferredSize());
JPanel panel = new JPanel(new GridBagLayout());
GridBagConstraints gbc = new GridBagConstraints();
gbc.weighty = 1.0;
gbc.gridwidth = GridBagConstraints.REMAINDER;
panel.add(dropEnabled, gbc);
panel.add(noDrop, gbc);
panel.add(textField, gbc);
return panel;
}
private MouseListener ml = new MouseAdapter() {
public void mousePressed(MouseEvent e) {
JComponent c = (JComponent)e.getSource();
TransferHandler handler = c.getTransferHandler();
handler.exportAsDrag(c, e, TransferHandler.COPY);
}
};
public static void main(String[] args) {
JFrame f = new JFrame();
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.getContentPane().add(new DragNoDrop().getContent());
f.setSize(300,160);
f.setLocation(200,200);
f.setVisible(true);
}
}
