Tooltip Problem with Synth

From:

"Harri E" <derharri@web.de>

Newsgroups:

comp.lang.java.gui,comp.lang.java.programmer

Date:

25 Sep 2006 06:12:33 -0700

Message-ID:

<1159189953.402596.74330@m73g2000cwd.googlegroups.com>

Hello,

i have a very strange behaviour with Tooltips in Synth. I created a
component extending JTextField using a own Tooltip. First time the
Tooltip appears there are no problems but from second time on i get an
Exception. To demonstrate the problem i created a very simple class
which containes all the necessary parts to demonstrate the behaviour.

public class MyToolTipField extends JTextField {
    JToolTip tooltip = new JToolTip();

    @Override
    public JToolTip createToolTip() {
        if(this.tooltip==null){
            this.tooltip = new JToolTip();
        }
        return this.tooltip;
    }

}

the Exception is:

Exception in thread "AWT-EventQueue-1" java.lang.NullPointerException
    at
javax.swing.plaf.synth.SynthToolTipUI.getPreferredSize(SynthToolTipUI.java:139)
    at javax.swing.JComponent.getPreferredSize(JComponent.java:1615)
    at javax.swing.ToolTipManager.showTipWindow(ToolTipManager.java:233)
    at
javax.swing.ToolTipManager$insideTimerAction.actionPerformed(ToolTipManager.java:655)
    at javax.swing.Timer.fireActionPerformed(Timer.java:271)
    at javax.swing.Timer$DoPostEvent.run(Timer.java:201)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:461)
    at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
    at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
    at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
    at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)
Exception in thread "AWT-EventQueue-1" java.lang.NullPointerException
    at
javax.swing.plaf.synth.SynthToolTipUI.getPreferredSize(SynthToolTipUI.java:139)
    at javax.swing.JComponent.getPreferredSize(JComponent.java:1615)
    at javax.swing.ToolTipManager.showTipWindow(ToolTipManager.java:233)
    at javax.swing.ToolTipManager.mouseMoved(ToolTipManager.java:591)
    at
java.awt.AWTEventMulticaster.mouseMoved(AWTEventMulticaster.java:272)
    at java.awt.Component.processMouseMotionEvent(Component.java:5533)
    at
javax.swing.JComponent.processMouseMotionEvent(JComponent.java:3144)
    at java.awt.Component.processEvent(Component.java:5257)
    at java.awt.Container.processEvent(Container.java:1966)
    at java.awt.Component.dispatchEventImpl(Component.java:3955)
    at java.awt.Container.dispatchEventImpl(Container.java:2024)
    at java.awt.Component.dispatchEvent(Component.java:3803)
    at
java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4212)
    at
java.awt.LightweightDispatcher.processMouseEvent(Container.java:3905)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3822)
    at java.awt.Container.dispatchEventImpl(Container.java:2010)
    at java.awt.Component.dispatchEvent(Component.java:3803)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:463)
    at
java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:242)
    at
java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:163)
    at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:157)
    at
java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:149)
    at java.awt.EventDispatchThread.run(EventDispatchThread.java:110)

When i do not user Synth but e.g MetallLookAndFell i do not have these
Problems.

Has anyone a comparable Problem an maybe allready solved it?
Maybe the Problems is how i defined the Tooltip in my Synth-xml file?

<style id="tooltip" clone="default">
    <insets top="1" left="5" bottom="1" right="5" />
    <state>
        <color idref="colorFormTextRegular" type="TEXT_FOREGROUND" />
        <color idref="colorSelectTextBackground" type="BACKGROUND" />
    </state>
</style>
<bind style="tooltip" type="region" key="ToolTip" />

Thanks for any help

Harri E.