Spinner with dynamic max value

I am trying to create a spinner with a dynamic max value. Each time the spinner's value changes, I calculate a new maximum value for it.

Code: Select all

<p:spinner value="#{filesList.transitionTime}" min="1" max="#{filesList.maxValue}" id="timeline_transition_time" valueChangeListener="#{filesList.transitionTimeChangeListener}">
                        <f:ajax execute="timeline_transition_time" render="timeline_total_duration"/>
                    </p:spinner>

<h:panelGroup id="timeline_total_duration" layout="block">
...
</h:panelGroup>

Although in my backing bean FilesList I am able to set a maximum value correctly in the transitionTimeChangeListener, I can't update it in the view using Ajax (I know I could use onchange="submit()" but I don't want to submit the form everytime I change the spinner's value).

Any idea on how I could solve this problem?

[optimus.prime]

max property is read only once when component is initialized, so server side changes are not reflected since you dont update client side. Updating spinner itself will probably help.

I had already tried to update spinner itself by inserting its id in the list of values of the f:ajax render attribute, like this:

Code: Select all

<p:spinner value="#{filesList.transitionTime}" min="1" max="#{filesList.maxValue}" id="timeline_transition_time" valueChangeListener="#{filesList.transitionTimeChangeListener}">
                        <f:ajax execute="timeline_transition_time" render="timeline_total_duration timeline_transition_time"/>
                    </p:spinner>

But everytime I change the spinner's value, it shows an "undefined" string:



Was this your solution or did I misurderstand?

Any idea?