h selectBooleanCheckbox valueChangeListener not working properly

[Kumar Gaurav]

Hi All,

I am using a selectBooleanCheckBox. Initially it is deselected. When i select it for the first time it is getting selected and valueChnageListener is getting executed. Again if i am trying to deselect it, neither it is getting deselected not valueChangeListener is getting executed. Below is the code.

<h:panelGroup id="panel#{productItem.uniqueId}">
					<h:panelGroup id="dropDownPanel">					
					<c:choose>
					<c:when test="#{productItem.dropdownEnabled eq 'true'}">
					<h:selectBooleanCheckbox value="#{productItem.checkedValue}" id="#{productItem.uniqueId}"
							disabled="false" valueChangeListener="#{spcProductModel.productClicked}">
							<a4j:support event="onchange"
									reRender="dropDownPanel,productsPanel" />
						</h:selectBooleanCheckbox>
						
					</c:when>
					<c:otherwise>
					<h:selectBooleanCheckbox value="#{productItem.checkedValue}" 
							disabled="false">
							<a4j:support event="onchange"
									reRender="dropDownPanel,productsPanel" />
							
						</h:selectBooleanCheckbox>
						
					</c:otherwise>
					</c:choose>
						
                    <c:choose>
					<c:when test="#{productItem.dropdownEnabled eq 'true'}">
						<h:selectOneMenu id="dropdown#{productItem.uniqueId}" disabled="#{productItem.dropdownEnabled}" value="#{productItem.value}" valueChangeListener="#{spcProductModel.dropdownChanged}">

							<f:selectItem
								itemLabel="#{productItem.productRelation.product.productName}"
								itemValue="0" />
							
						</h:selectOneMenu>
						</c:when>
						<c:otherwise>
						<h:selectOneMenu id="dropdown#{productItem.uniqueId}" disabled="#{productItem.dropdownEnabled}" value="#{productItem.value}" valueChangeListener="#{spcProductModel.dropdownChanged}">

							
							<c:forEach var="selectItem"
								items="#{productItem.encodedModel.products}">
								<f:selectItem
									itemLabel="#{selectItem.productRelation.product.productName}"
									itemValue="#{selectItem.uniqueId}" />
								<a4j:support event="onchange"
									reRender="dropDownPanel,productsPanel,parametersCardForm" />
							</c:forEach><!--
							<f:setA
						--></h:selectOneMenu>
						</c:otherwise>
						</c:choose>
					</h:panelGroup>
				</h:panelGroup>

Any pointer why it is not working.

[Stefan Evans]

First suggestion: when posting code use \[code] tags. There is even a button for it.
It makes the code much easier to read - see?

Second suggestion: JSTL and JSF don't really play that well together according to my understanding.
I would avoid mixing them (though my experience with JSF and JSTL is years out of date, so that may have changed)

On one path through the code, you render the component with a value change listener.
On the other path you don't?
Maybe that path is being executed?

Rather than having two different ways of declaring these components, I would rather declare the controls once, and deal with the check in the listener.

[Tim Holloway]

Stefan Evans wrote:
Second suggestion: JSTL and JSF don't really play that well together according to my understanding.
I would avoid mixing them (though my experience with JSF and JSTL is years out of date, so that may have changed)

It used to be that mixing JSTL and JSF was an unmitigated disaster, but as JSF matured, it merely became asking for trouble. Extra trouble when AJAX is involved.

For the most part, there's NOTHING in JSTL that JSF can't handle using pure JSF, and do so more cleanly. I've never ever found it necessary to put JSTL on a JSF View definition.

And in particular, using logic constructs (loops and conditions) on a JSF View breaks the MVC contract that says logic goes in Controllers, not in the View. If you want a tabular display in JSF, use the DataTable control. If you need conditional rendering of components, use the "rendered=" attribute.