<Swing Dev> [TEST CASE] 6219960 NullPointer on ToolTipManager.mouseEntered

[Alexander Potochkin]

Hello Jason

Your test case is really helpful, thank you very much

I reopened this bug and upgraded its priority

Thanks again
alexp

> Bug 6219960 has marked Closed, will not be fixed because the evaluator 
> could not create a test case.  Attached is a test case that will produce 
> the null pointer without using custom components (JDK6u4).  Hopefully 
> this is enough proof that this is a real bug.
>  
> Jason Mehrens
> 
> ------------------------------------------------------------------------
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> 
> ------------------------------------------------------------------------
> 
> import java.awt.*;
> import javax.swing.*;
> import javax.swing.table.*;
> 
> public class SinglePixelTooltip implements Runnable {
> 
>   static volatile Robot robot;
> 
>   static JFrame frame;
>   static JButton save;
>   static JTable table;
> 
>   public static void main(String[] args) throws Exception {
>     robot = new Robot();
>     SwingUtilities.invokeAndWait(new SinglePixelTooltip());
>     robot.waitForIdle();
>     Thread.sleep(5L * 1000L);
>     showModal("The tooltip should be showing. Press ok with mouse. And don't move it.");
>     showModal("Now press ok and move the mouse inside the table (don't leave it).");
> 
>     Thread.sleep(5L * 1000L);
>     showModal("Notice the error happens on mouse move.\n"+
>               "Press ok and move the mouse over the "+
>               "button to stop the errors.\n"+
>               "When the tooltip is shown the 1x1 pixel is gone.");
>   }
> 
> 
>   public void run() {
>     ToolTipManager.sharedInstance().setDismissDelay(10 * 60 * 1000);
>     frame = new JFrame();
>     frame.setLocation(20, 20);
>     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
>     JDesktopPane desk = new JDesktopPane();
>     JInternalFrame iframe = new JInternalFrame();
>     iframe.setDefaultCloseOperation(JInternalFrame.DISPOSE_ON_CLOSE);
>     desk.add(iframe);
>     save = new JButton();
>     save.setToolTipText("Wait for dialog to show.");
>     save.setText("Wait for the tooltip to show.");
>     JPanel panel = new JPanel(new GridLayout(1, 2));
>     panel.add(save);
>     table = createTable();
>     panel.add(new JScrollPane(table));
>     iframe.setContentPane(panel);
>     frame.getContentPane().add(desk);
>     frame.setSize(800, 600);
>     iframe.setSize(640, 480);
>     iframe.validate();
>     iframe.setVisible(true);
>     frame.validate();
>     frame.setVisible(true);
>     try {
>       iframe.setSelected(true);
>     }
>     catch(Exception E) {
>       throw new AssertionError(E);
>     }
> 
>     Point pt = frame.getLocation();
>     robot.mouseMove(pt.x + 100, pt.y + 100);
>   }
> 
>   private static void showModal(final String msg) throws Exception {
>     SwingUtilities.invokeAndWait(new Runnable() {
>       public void run() {
>         JOptionPane.showInternalMessageDialog(table, msg,
>                                               Thread.currentThread().toString(),
>                                               JOptionPane.PLAIN_MESSAGE);
>       }
>     });
>   }
> 
>   private static JTable createTable() {
>     DefaultTableModel model = new DefaultTableModel();
>     JTable table = new JTable(model);
>     table.setFillsViewportHeight(true);
>     return table;
>   }
> }