Examples of org.apache.tapestry.event.ChangeObserver

org.apache.tapestry.event.ChangeObserver
May observe changes in an object's properties. This is a "weak" variation on JavaBean's style bound properties. It is used when there will be at most a single listener on property changes, and that the listener is not interested in the old value. @author Howard Lewis Ship @version $Id: ChangeObserver.java 243791 2004-02-19 17:38:13Z hlship $

    public static void fireObservedChange(
        IComponent component,
        String propertyName,
        Object newValue)
    {
        ChangeObserver observer = component.getPage().getChangeObserver();


        if (observer == null)
            return;


        ObservedChangeEvent event = new ObservedChangeEvent(component, propertyName, newValue);


        observer.observeChange(event);
    }

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    public static void fireObservedChange(
        IComponent component,
        String propertyName,
        boolean newValue)
    {
        ChangeObserver observer = component.getPage().getChangeObserver();


        if (observer == null)
            return;


        ObservedChangeEvent event =
            new ObservedChangeEvent(
                component,
                propertyName,
                newValue ? Boolean.TRUE : Boolean.FALSE);


        observer.observeChange(event);
    }

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    public static void fireObservedChange(
        IComponent component,
        String propertyName,
        double newValue)
    {
        ChangeObserver observer = component.getPage().getChangeObserver();


        if (observer == null)
            return;


        ObservedChangeEvent event =
            new ObservedChangeEvent(component, propertyName, new Double(newValue));


        observer.observeChange(event);
    }

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    public static void fireObservedChange(
        IComponent component,
        String propertyName,
        float newValue)
    {
        ChangeObserver observer = component.getPage().getChangeObserver();


        if (observer == null)
            return;


        ObservedChangeEvent event =
            new ObservedChangeEvent(component, propertyName, new Float(newValue));


        observer.observeChange(event);
    }

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    *
    * @since 3.0
    */
    public static void fireObservedChange(IComponent component, String propertyName, int newValue)
    {
        ChangeObserver observer = component.getPage().getChangeObserver();


        if (observer == null)
            return;


        ObservedChangeEvent event =
            new ObservedChangeEvent(component, propertyName, new Integer(newValue));


        observer.observeChange(event);
    }

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    *
    * @since 3.0
    */
    public static void fireObservedChange(IComponent component, String propertyName, long newValue)
    {
        ChangeObserver observer = component.getPage().getChangeObserver();


        if (observer == null)
            return;


        ObservedChangeEvent event =
            new ObservedChangeEvent(component, propertyName, new Long(newValue));


        observer.observeChange(event);
    }

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     *
     * @since 3.0
     */
    public static void fireObservedChange(IComponent component, String propertyName, char newValue)
    {
        ChangeObserver observer = component.getPage().getChangeObserver();


        if (observer == null)
            return;


        ObservedChangeEvent event =
            new ObservedChangeEvent(component, propertyName, new Character(newValue));


        observer.observeChange(event);
    }

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     *
     * @since 3.0
     */
    public static void fireObservedChange(IComponent component, String propertyName, byte newValue)
    {
        ChangeObserver observer = component.getPage().getChangeObserver();


        if (observer == null)
            return;


        ObservedChangeEvent event =
            new ObservedChangeEvent(component, propertyName, new Byte(newValue));


        observer.observeChange(event);
    }

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    public static void fireObservedChange(
        IComponent component,
        String propertyName,
        short newValue)
    {
        ChangeObserver observer = component.getPage().getChangeObserver();


        if (observer == null)
            return;


        ObservedChangeEvent event =
            new ObservedChangeEvent(component, propertyName, new Short(newValue));


        observer.observeChange(event);
    }

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     *            the new value for the property
     * @since 3.0
     */
    public static void fireObservedChange(IComponent component, String propertyName, Object newValue)
    {
        ChangeObserver observer = component.getPage().getChangeObserver();


        if (observer == null)
            return;


        ObservedChangeEvent event = new ObservedChangeEvent(component, propertyName, newValue);


        observer.observeChange(event);
    }

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Related Classes of org.apache.tapestry.event.ChangeObserver

org.apache.tapestry.AbstractComponent

org.apache.tapestry.Tapestry

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