Reputation: 2219
I have enabled the default custom drag and support for a JTree
, it works like a charm :)
I have one tree, one text and one editor pane, if I drag any node from the tree to the text area, it pastes the text, but when I do the same thing to the editor pane, it doesn't copy the plain text, it copies the text with bullet and changes the entire layout.
All I need is to copy the plain text to the editor pane, this only happens when I set the content type to "plain/text" when the change the content type it will copy with bullet symbol...
Is there any possibility that when I drop to the text area/editor pane, instead of name of node, it should place 'name of the node +"?"', I have googled it but only can find how to enable the drag and support for JLabel
.
package testing_dragging;
import java.awt.datatransfer.DataFlavor;
import java.io.IOException;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JComponent;
import javax.swing.TransferHandler;
public class test_dragging_form extends javax.swing.JFrame {
/**
* Creates new form test_dragging_form
*/
public test_dragging_form() {
initComponents();
}
/**
* This method is called from within the constructor to initialize the form.
* WARNING: Do NOT modify this code. The content of this method is always
* regenerated by the Form Editor.
*/
@SuppressWarnings("unchecked")
// <editor-fold defaultstate="collapsed" desc="Generated Code">
private void initComponents() {
jScrollPane1 = new javax.swing.JScrollPane();
jTree1 = new javax.swing.JTree();
jScrollPane2 = new javax.swing.JScrollPane();
jTextArea1 = new javax.swing.JTextArea();
jScrollPane3 = new javax.swing.JScrollPane();
jEditorPane1 = new javax.swing.JEditorPane();
jLabel1 = new javax.swing.JLabel();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTree1.setDragEnabled(true);
jTree1.addMouseMotionListener(new java.awt.event.MouseMotionAdapter() {
public void mouseMoved(java.awt.event.MouseEvent evt) {
jTree1MouseMoved(evt);
}
});
jScrollPane1.setViewportView(jTree1);
jTextArea1.setColumns(20);
jTextArea1.setRows(5);
jTextArea1.setDragEnabled(true);
jScrollPane2.setViewportView(jTextArea1);
try
{
jEditorPane1.setPage("file:///home/rocky/Desktop/test_plan_template.html");
}
catch(Exception ex)
{
System.out.println("Some exception occured"+ ex.getMessage());
}
jEditorPane1.setDragEnabled(true);
jScrollPane3.setViewportView(jEditorPane1);
jLabel1.setText("draglabel");
jLabel1.addMouseListener(new java.awt.event.MouseAdapter() {
public void mousePressed(java.awt.event.MouseEvent evt) {
jLabel1MousePressed(evt);
}
});
javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
getContentPane().setLayout(layout);
layout.setHorizontalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(29, 29, 29)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(55, 55, 55)
.addComponent(jLabel1))
.addComponent(jScrollPane3, javax.swing.GroupLayout.PREFERRED_SIZE, 400, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(99, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(javax.swing.GroupLayout.Alignment.TRAILING, layout.createSequentialGroup()
.addGap(0, 12, Short.MAX_VALUE)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(layout.createSequentialGroup()
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addComponent(jScrollPane2, javax.swing.GroupLayout.PREFERRED_SIZE, 163, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGroup(layout.createSequentialGroup()
.addGap(47, 47, 47)
.addComponent(jLabel1)))
.addPreferredGap(javax.swing.LayoutStyle.ComponentPlacement.RELATED)
.addComponent(jScrollPane3, javax.swing.GroupLayout.PREFERRED_SIZE, 200, javax.swing.GroupLayout.PREFERRED_SIZE))))
);
pack();
}// </editor-fold>
private void jTree1MouseMoved(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
JComponent comp = (JComponent)evt.getSource();
TransferHandler handler = comp.getTransferHandler();
comp.setTransferHandler(handler);
handler.exportAsDrag(comp, evt, TransferHandler.COPY);
}
private void jLabel1MousePressed(java.awt.event.MouseEvent evt) {
// TODO add your handling code here:
JComponent comp = (JComponent)evt.getSource();
TransferHandler handler = new TransferHandler("text");
comp.setTransferHandler(handler);
handler.exportAsDrag(comp, evt, TransferHandler.COPY);
}
/**
* @param args the command line arguments
*/
public static void main(String args[]) {
/*
* Set the Nimbus look and feel
*/
//<editor-fold defaultstate="collapsed" desc=" Look and feel setting code (optional) ">
/*
* If Nimbus (introduced in Java SE 6) is not available, stay with the
* default look and feel. For details see
* http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html
*/
try {
for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
if ("Nimbus".equals(info.getName())) {
javax.swing.UIManager.setLookAndFeel(info.getClassName());
break;
}
}
} catch (ClassNotFoundException ex) {
java.util.logging.Logger.getLogger(test_dragging_form.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (InstantiationException ex) {
java.util.logging.Logger.getLogger(test_dragging_form.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (IllegalAccessException ex) {
java.util.logging.Logger.getLogger(test_dragging_form.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
} catch (javax.swing.UnsupportedLookAndFeelException ex) {
java.util.logging.Logger.getLogger(test_dragging_form.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
}
//</editor-fold>
/*
* Create and display the form
*/
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
new test_dragging_form().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JEditorPane jEditorPane1;
private javax.swing.JLabel jLabel1;
private javax.swing.JScrollPane jScrollPane1;
private javax.swing.JScrollPane jScrollPane2;
private javax.swing.JScrollPane jScrollPane3;
private javax.swing.JTextArea jTextArea1;
private javax.swing.JTree jTree1;
// End of variables declaration
}
Upvotes: 2
Views: 1233
Reputation: 2050
I have a little experience with custom drag'n'drop and may be your problem has better solution, but this works:
Make your custom dropTarget for JEditorPane. It will pick the text/plain DataFlavor instead of default text/html one;
class JEditorPaneDropTarget extends DropTargetAdapter{
JEditorPaneDropTarget(JEditorPane pane) {
new DropTarget(pane, this);
}
@Override
public void drop(DropTargetDropEvent dtde) {
Transferable tr = dtde.getTransferable();
Object data;
try {
DataFlavor df = new DataFlavor("text/plain; class=java.lang.String");
data = tr.getTransferData(df);
JEditorPane pane = (JEditorPane) ((DropTarget)dtde.getSource()).getComponent();
pane.setText((String)data);
} catch (Exception e) {
//
}
}
}
Initialize it with your jEditorPane1 somewhere in initComponents():
new JEditorPaneDropTarget(jEditorPane1);
Here are no checks for possible null or cast exceptions, so you will need those too. Read something about DataFlavors and how to use them. May be there is a way to mention right DataFlavor to use without writing whole custom DropTarget class, but i didn't find any.
Upvotes: 1