Select text with KeyBoardFocusManager
I am trying to implement a class that will automatically select all text when focus is gained.
I am using the below code. I don't know why, but it does not work until AFTER you tab through all the components once. So, if you press tab 4 times, it will begin highlighting.
Any ideas why? It is not very intuitive why it would do this...
Thanks!
/*
* NewJFrame.java
*
* Created on July 4, 2007, 10:42 AM
*/
/*
* Main.java
*
* Created on July 4, 2007, 10:41 AM
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
package javaapplication1;
import java.awt.Component;
import java.awt.DefaultKeyboardFocusManager;
import java.awt.KeyboardFocusManager;
import javax.swing.JTextField;
import javax.swing.text.JTextComponent;
/**
*
* @author student
*/
publicclass NewJFrameextends javax.swing.JFrame{
class testFocusextends DefaultKeyboardFocusManager{
publicvoid focusNextComponent(Component aComponent){
super.focusNextComponent(aComponent);
if (aComponentinstanceof JTextComponent)
((JTextComponent)aComponent).selectAll();
}
}
/** Creates new form NewJFrame */
public NewJFrame(){
initComponents();
KeyboardFocusManager.setCurrentKeyboardFocusManager(new testFocus());
}
/** 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.
*/
// <editor-fold defaultstate="collapsed" desc=" Generated Code ">
privatevoid initComponents(){
jTextField1 =new javax.swing.JTextField();
jTextField2 =new javax.swing.JTextField();
jTextField3 =new javax.swing.JTextField();
setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);
jTextField1.setText("jTextField1");
jTextField2.setText("jTextField2");
jTextField3.setText("jTextField3");
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(67, 67, 67)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(25, 25, 25)
.addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addGap(29, 29, 29)
.addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addContainerGap(102, Short.MAX_VALUE))
);
layout.setVerticalGroup(
layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
.addGroup(layout.createSequentialGroup()
.addGap(54, 54, 54)
.addGroup(layout.createParallelGroup(javax.swing.GroupLayout.Alignment.BASELINE)
.addComponent(jTextField1, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jTextField2, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE)
.addComponent(jTextField3, javax.swing.GroupLayout.PREFERRED_SIZE, javax.swing.GroupLayout.DEFAULT_SIZE, javax.swing.GroupLayout.PREFERRED_SIZE))
.addContainerGap(226, Short.MAX_VALUE))
);
pack();
}// </editor-fold>
/**
* @param args the command line arguments
*/
publicstaticvoid main(String args[]){
java.awt.EventQueue.invokeLater(new Runnable(){
publicvoid run(){
new NewJFrame().setVisible(true);
}
});
}
// Variables declaration - do not modify
private javax.swing.JTextField jTextField1;
private javax.swing.JTextField jTextField2;
private javax.swing.JTextField jTextField3;
// End of variables declaration
}
