I have a JPanel
A with a title border inside a JPanel
B of a JTabbedPanel
C. I have a method refreshing the content of A and B which is called from time-to-time.
Unfortunately, all the items of A and B are refreshed in time, but not the title of A. I explicitely have to switch to another tabbed panel and come back to C for A's title to be displayed properly. Why?
The code I am using is the following:
TitledBorder tmp
= (TitledBorder) this.GroupingProfilePanel.getBorder();
// Resetting header
if ( this.c != null ) {
tmp.setTitle("Set - " + this.c.getName());
} else {
tmp.setTitle("Set");
}
After updating the title, verify that you invoke repaint()
on the component having the titled border or one of its ancestors.
import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.util.Date;
import javax.swing.AbstractAction;
import javax.swing.BorderFactory;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.border.TitledBorder;
/** @see http://stackoverflow.com/questions/6566612 */
public class TitledBorderTest {
public static void main(String[] args) {
EventQueue.invokeLater(new Runnable() {
public void run() {
new TitledBorderTest().create();
}
});
}
private void create() {
String s = "This is a TitledBorder update test.";
final JLabel label = new JLabel(s);
final TitledBorder tb =
BorderFactory.createTitledBorder(new Date().toString());
label.setBorder(tb);
JFrame f = new JFrame("Titled Border Test");
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.add(label);
f.add(new JButton(new AbstractAction("Update") {
public void actionPerformed(ActionEvent e) {
tb.setTitle(new Date().toString());
label.repaint();
}
}), BorderLayout.SOUTH);
f.pack();
f.setLocationRelativeTo(null);
f.setVisible(true);
System.out.println(tb.getMinimumSize(f));
}
}
来源:https://stackoverflow.com/questions/6566612/delayed-titledborder-title-update-refresh-why