Reputation: 15
I want to create a jcombobox which sets the caret position to 0 position when tab is pressed. i.e when there are different components in your panel and when you press tab, and it selects jcombobox, and since it is editable jcombobox if i clicked on textfield of jcombobox at any caret position, it will stay at that caret position, when i pressed tab and switch to other components and finally reach the combobox the position of caret remains same. I want to set the position of caret in textfield of combobox to 0 position when i use tab button.
Upvotes: 1
Views: 834
Reputation: 7507
You can set the Caret to 0
position on focus gained. But this will set the Caret on mouse click, too. If it is ok? see:
import java.awt.BorderLayout;
import java.awt.Dimension;
import java.awt.EventQueue;
import java.awt.FlowLayout;
import java.awt.event.FocusAdapter;
import java.awt.event.FocusEvent;
import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JMenu;
import javax.swing.JMenuBar;
import javax.swing.JPanel;
import javax.swing.text.JTextComponent;
public class BorderPanel extends JFrame{
public BorderPanel() {
JButton btn0 = new JButton( "Hilfe" );
JButton btn1 = new JButton( "Apply" );
JButton btn2 = new JButton( "Cancel" );
JButton btn3 = new JButton( "OK" );
JPanel sub1 = new JPanel(new FlowLayout( FlowLayout.TRAILING, 5, 5 ));
JPanel sub2 = new JPanel(new FlowLayout( FlowLayout.TRAILING, 5, 5 ));
JMenuBar mnu = new JMenuBar();
mnu.add( new JMenu( "File" ) );
mnu.add( new JMenu( "Insert" ) );
mnu.add( new JMenu( "Edit" ) );
mnu.add( new JMenu( "Help" ) );
JComboBox<String> cmb = new JComboBox<String>();
cmb.getEditor().getEditorComponent().addFocusListener( new FocusAdapter() {
@Override
public void focusGained( FocusEvent e ) {
if(e.getSource() instanceof JTextComponent) {
((JTextComponent)e.getSource()).setCaretPosition( 0 );
}
}
} );
cmb.setEditable( true );
cmb.addItem( "Lorem" );
cmb.addItem( "Ipsum" );
cmb.addItem( "Dolor" );
cmb.addItem( "Sit Amet" );
JPanel pnl = new JPanel();
pnl.add(cmb);
sub1.add( btn0 );
sub2.add( btn1 );
sub2.add( btn2 );
sub2.add( btn3 );
JPanel bar = new JPanel();
bar.setLayout( new BorderLayout( 20, 20 ) );
bar.add( sub1, BorderLayout.WEST );
bar.add( Box.createHorizontalGlue(), BorderLayout.CENTER );
bar.add( sub2, BorderLayout.EAST );
setDefaultCloseOperation( EXIT_ON_CLOSE );
getContentPane().setLayout( new BorderLayout() );
getContentPane().add( mnu, BorderLayout.NORTH );
getContentPane().add( pnl, BorderLayout.CENTER );
getContentPane().add( bar, BorderLayout.SOUTH );
setSize( new Dimension( 600, 400 ) );
setLocationRelativeTo( null );
}
public static void main( String[] args ) {
EventQueue.invokeLater( new Runnable() {
@Override
public void run() {
new BorderPanel().setVisible( true );
}
} );
}
}
Upvotes: 1