dropdown-hide-when-empty.xml

<xh:html xmlns:xh="http://www.w3.org/1999/xhtml" xmlns:xf="http://www.w3.org/2002/xforms"
         xmlns:xs="http://www.w3.org/2001/XMLSchema"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xmlns:ev="http://www.w3.org/2001/xml-events"
         xmlns:xi="http://www.w3.org/2001/XInclude"
         xmlns:xxi="http://orbeon.org/oxf/xml/xinclude"
         xmlns:xxf="http://orbeon.org/oxf/xml/xforms"
         xmlns:exf="http://www.exforms.org/exf/1-0"
         xmlns:fr="http://orbeon.org/oxf/xml/form-runner"
         xmlns:saxon="http://saxon.sf.net/"
         xmlns:sql="http://orbeon.org/oxf/xml/sql"
         xmlns:soap="http://schemas.xmlsoap.org/soap/envelope/"
         xmlns:fb="http://orbeon.org/oxf/xml/form-builder">
    <xh:head>
        <xh:title>Data-bound drop-down</xh:title>
        <xh:style type="text/css">
            .orbeon .fr-itemset-empty-true { display: none }
        </xh:style>
        <xf:model id="fr-form-model" xxf:expose-xpath-types="true">

            <!-- Main instance -->
            <xf:instance id="fr-form-instance" xxf:exclude-result-prefixes="#all">
                <form>
                    <state-city-zip>
                        <state itemset-empty="false"/>
                        <city itemset-empty="true"/>
                        <zip itemset-empty="true"/>
                        
                    </state-city-zip>
                </form>
            </xf:instance>

            <!-- Bindings -->
            <xf:bind id="fr-form-binds" ref="instance('fr-form-instance')">
                <xf:bind id="state-city-zip-bind" name="state-city-zip" ref="state-city-zip">
                    <xf:bind id="state-bind" ref="state" name="state" required="true()"/>
                    <xf:bind id="city-bind" ref="city" name="city"
                             fr:itemset-empty="@itemset-empty = 'true'"
                             required="@itemset-empty = 'false'"/>
                    <xf:bind id="zip-bind" ref="zip" name="zip" fr:itemset-empty="@itemset-empty = 'true'"
                             required="@itemset-empty = 'false'"/>
                    
                </xf:bind>
            </xf:bind>

            <!-- Metadata -->
            <xf:instance xxf:readonly="true" id="fr-form-metadata" xxf:exclude-result-prefixes="#all">
                <metadata>
                    <application-name>a</application-name>
                    <form-name>a</form-name>
                    <title xml:lang="en">Data-bound drop-down</title>
                    <description xml:lang="en"/>
                </metadata>
            </xf:instance>

            <!-- Attachments -->
            <xf:instance id="fr-form-attachments" xxf:exclude-result-prefixes="#all">
                <attachments>
                    <css mediatype="text/css" filename="" size=""/>
                    <pdf mediatype="application/pdf" filename="" size=""/>
                </attachments>
            </xf:instance>

            <!-- All form resources -->
            <!-- Don't make readonly by default in case a service modifies the resources -->
            <xf:instance id="fr-form-resources" xxf:readonly="false" xxf:exclude-result-prefixes="#all">
                <resources>
                    <resource xml:lang="en">
                        <state>
                            <label>State</label>
                            <hint/>
                        </state>
                        <city>
                            <label>City</label>
                            <hint/>
                        </city>
                        <zip>
                            <label>Zip</label>
                            <hint/>
                        </zip>
                        <state-city-zip>
                            <label>State, City, Zip</label>
                        </state-city-zip>
                        
                    </resource>
                </resources>
            </xf:instance>

            <!-- Utility instances for services -->
            <xf:instance id="fr-service-request-instance" xxf:exclude-result-prefixes="#all">
                <request/>
            </xf:instance>

            <xf:instance id="fr-service-response-instance" xxf:exclude-result-prefixes="#all">
                <response/>
            </xf:instance>

        </xf:model>
    </xh:head>
    <xh:body>
        <fr:view>
            <fr:body xmlns:xbl="http://www.w3.org/ns/xbl"
                     xmlns:oxf="http://www.orbeon.com/oxf/processors"
                     xmlns:p="http://www.orbeon.com/oxf/pipeline">
                <fr:section id="state-city-zip-control" bind="state-city-zip-bind">
                    <xf:label ref="$form-resources/state-city-zip/label"/>
                    <fr:grid>
                        <xh:tr>
                            <xh:td>
                                <fr:databound-select1 xmlns:xxbl="http://orbeon.org/oxf/xml/xbl" id="state-control"
                                                      appearance="minimal"
                                                      resource="/xforms-sandbox/service/zip-states"
                                                      bind="state-bind">
                                    <xf:label ref="$form-resources/state/label"/>
                                    <xf:hint ref="$form-resources/state/hint"/>
                                    <xf:alert ref="$fr-resources/detail/labels/alert"/>
                    
                    
                                    <xf:itemset ref="/states/state">
                                        <xf:label ref="@name"/>
                                        <xf:value ref="@abbreviation"/>
                                    </xf:itemset>
                                </fr:databound-select1>
                                
                            </xh:td>
                            <xh:td>
                                <fr:databound-select1 xmlns:xxbl="http://orbeon.org/oxf/xml/xbl" id="city-control" appearance="minimal"
                                                      resource="/xforms-sandbox/service/zip-cities?state-abbreviation={../state}"
                                                      bind="city-bind">
                                    <xf:label ref="$form-resources/city/label"/>
                                    <xf:hint ref="$form-resources/city/hint"/>
                                    <xf:alert ref="$fr-resources/detail/labels/alert"/>
                    
                    
                                    <xf:itemset ref="/cities/city">
                                        <xf:label ref="@name"/>
                                        <xf:value ref="@name"/>
                                    </xf:itemset>
                                </fr:databound-select1>
                            </xh:td>
                            <xh:td>
                                <fr:databound-select1 xmlns:xxbl="http://orbeon.org/oxf/xml/xbl" id="zip-control" appearance="minimal"
                                                      resource="/xforms-sandbox/service/zip-zips?state-abbreviation={../state}&amp;city={../city}"
                                                      bind="zip-bind">
                                    <xf:label ref="$form-resources/zip/label"/>
                                    <xf:hint ref="$form-resources/zip/hint"/>
                                    <xf:alert ref="$fr-resources/detail/labels/alert"/>
                    
                    
                                    <xf:itemset ref="/zips/zip">
                                        <xf:label ref="@code"/>
                                        <xf:value ref="@code"/>
                                    </xf:itemset>
                                </fr:databound-select1>
                            </xh:td>
                        </xh:tr>
                    </fr:grid>
                </fr:section>
            </fr:body>
        </fr:view>
    </xh:body>
</xh:html>