label setCursor not working when main frame is maximized

From:

Chris <cmills28@yahoo.com>

Newsgroups:

comp.lang.java.programmer

Date:

Fri, 16 May 2008 13:33:24 -0700 (PDT)

Message-ID:

<4d744efb-d601-4301-8888-48641922e707@y22g2000prd.googlegroups.com>

I have a label in a JInternalFrame. The label has a mouseListener on
it, to listen for clicks but also when the mouse is over the label.
When the mouse is over it, I want to change the cursor to a hand
cursor, and back to normal when exiting the label. All this works
when my frame & internal frame are their start up sizes, but if I
maximize the main JFrame and then move the mouse over the label, no
hand! But it's still clickable. For some reason teh setCursor isn't
working. But un-maximize the JFrame & things work again.

In the sample code below, I have 2 classes, the main application frame
that extends JFrame, and MyInternalFrame that extends JInternalFrame.
It's in the internal frame that holds the label & mouseListener.

Any help appreciated!!

import java.awt.BorderLayout;
import java.awt.Cursor;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import javax.swing.*;

public class TestLabelLink extends JFrame {
    JDesktopPane desktop;

    public TestLabelLink() {
        super("Test");

        setSize(400,400);

        //Set up the GUI.
        desktop = new JDesktopPane(); //a specialized layered pane

        MyInternalFrame frame = new MyInternalFrame();
        frame.setVisible(true); //necessary as of 1.3
        desktop.add(frame);
        try {
            frame.setSelected(true);
        } catch (java.beans.PropertyVetoException e) {}

        setContentPane(desktop);

        //Make dragging a little faster but perhaps uglier.
        desktop.setDragMode(JDesktopPane.OUTLINE_DRAG_MODE);
    }

    //Quit the application.
    protected void quit() {
        System.exit(0);
    }

    /**
     * Create the GUI and show it. For thread safety,
     * this method should be invoked from the
     * event-dispatching thread.
     */
    private static void createAndShowGUI() {
        //Make sure we have nice window decorations.
        JFrame.setDefaultLookAndFeelDecorated(true);

        //Create and set up the window.
        TestLabelLink frame = new TestLabelLink();
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        //Display the window.
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        //Schedule a job for the event-dispatching thread:
        //creating and showing this application's GUI.
        javax.swing.SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                createAndShowGUI();
            }
        });
    }
}

class MyInternalFrame extends JInternalFrame {

    JLabel label = new JLabel("<html><body><a href=\"\">click me</a></
body></html>");

    public MyInternalFrame() {
        super();
        setSize(200,200);

        this.getContentPane().add(label, BorderLayout.NORTH);

        label.addMouseListener(new MouseAdapter() {
            public void mouseClicked(MouseEvent e) {
                System.out.println("bang!");
            }

            public void mouseEntered(MouseEvent e) {
                label.setCursor(new Cursor(Cursor.HAND_CURSOR));
            }

            public void mouseExited(MouseEvent e) {
                label.setCursor(new Cursor(Cursor.DEFAULT_CURSOR));
            }
        });
    }
}