How to change control visibility of Orbeon forms at runtime?

Question

I am trying to find out how to change the control visibility of a text box at runtime for an Orbeon form. At the following sample, I have created an image button - when the user clicks on this button I wish to show / hide another button but unfortunately my code is not working properly:

<xf:trigger> 
                            <xf:label>
                                <xf:output value="concat('&lt;img src=''http://**********:8081/green-light.png', image, '''&gt;')"
                                           mediatype="text/html"/>
                            </xf:label> 
                            <xxf:script event="DOMActivate">
                              var remarksControl = ORBEON.jQuery('*[id $= "remarks-control"]')[0];
                                remarksControl.hidden= true;
                            </xxf:script>  
                        </xf:trigger> 

                        </fr:c>
                    <fr:c y="1" x="7" w="6">

                    </fr:c>
                    <fr:c x="1" y="2" w="6">
                        <xf:input id="remarks-control" bind="remarks-bind">
                            <xf:label ref="$form-resources/remarks/label"/>
                            <xf:hint ref="$form-resources/remarks/hint"/>
                            <xf:alert ref="$fr-resources/detail/labels/alert"/>                                                                                                                                              
                        </xf:input>
                    </fr:c>

What is the best approach to implement this kind of functionality? What I am actually trying to achieve is to have a form with several images and the user when clicks on an image she will be able to activate / deactivate several text fields on the form.

Thanks in advance

Answer 1

I would try to avoid using JavaScript to handle a case like this. The button is bound to an element, just like any other control. So you write some XForms that stores a value, say show-textfield, when the button is clicked. Assuming your button is named button, you can do so with the following custom model:

<xf:model xmlns:xf="http://www.w3.org/2002/xforms">

    <xf:action
        observer="button-control"
        event="DOMActivate">
        <xf:setvalue ref="event('xxf:binding')">show-textfield</xf:setvalue>
    </xf:action>

</xf:model>

Then the control you want to show upon the button being clicked can have the Visibility formula $button = 'show-textfield'. As a result, you'll get a result like: