Union widget

Uses one out of a set of widgets based on the value of a certain other widget.

<fd:union id="..." case="..." state="...">
  <fd:widgets>
    [...]
  </fd:widgets>
  <fd:on-create>
    [...]
  </fd:on-create>
  <fd:attributes>
    <fd:attribute name="..." value="..."/>    
  </fd:attributes>
</fd:union>

The case attribute specifies the ID of a widget that will be used to select which one of the widgets will be active (the value of the case widget should correspond to the ID of one of those widgets). This case widget will most often be a field with a selection list.

If you want to switch between sets of widgets, you can group them into group widgets.

Insertion of a union widget in a template is done using ft:union and ft:case elements:

<ft:union id="...">
  <ft:case id="...">
    [...]
  </ft:case>
  [... more ft:case elements ...]
</ft:union>

Definition:

<fd:field id="testcase">
  <fd:datatype base="string"/>
  <fd:selection-list>
    <fd:item value="case1"><fd:label>Case 1</fd:label></fd:item>
    <fd:item value="case2"><fd:label>Case 2</fd:label></fd:item>
  </fd:selection-list>
</fd:field>

<fd:union id="testunion" case="testcase">
  <fd:widgets>
    <fd:group id="case1">
      <fd:field id="field1">
        <fd:datatype base="string"/>
      </fd:field>
      <fd:field id="field2">
        <fd:datatype base="string"/>
      </fd:field>
    </fd:group>
    <fd:group id="case2">
      <fd:field id="field1">
        <fd:datatype base="long"/>
      </fd:field>
      <fd:field id="field2">
        <fd:datatype base="long"/>
      </fd:field>
    </fd:group>
  </fd:widgets>
</fd:union>

Template:

<ft:widget id="testcase">
  <fi:styling list-type="dropdown" submit-on-change="true"/>
</ft:widget>

<ft:union id="testunion">
  <ft:case id="case1">
    <ft:group id="case1">
      <ft:widget id="field1"/>
      <ft:widget id="field2"/>
    </ft:group>
  </ft:case>
  <ft:case id="case2">
    <ft:group id="case2">
      <ft:widget id="field1"/>
      <ft:widget id="field2"/>
    </ft:group>
  </ft:case>
</ft:union>