Displaying Dynamic Attributes

When you create a new editor or browser screen in the project with the plugged Dynamic Attributes add-on, the framework automatically adds the dynamicAttributes facet in XML descriptors.

Another way to show dynamic attributes in screens is using DynamicAttributesPanel.

Using dynamicAttributes Facet

dynamicAttributes facet allows you to show dynamic attributes in Table or Form components bound to a data container with the entity having dynamic attributes.

Add dynamicAttributes facet to the facets section in the screen XML descriptor:

<window xmlns="http://jmix.io/schema/ui/window"
        caption="msg://carEdit.caption"
        focusComponent="form"
        xmlns:dynattrui="http://jmix.io/schema/dynattr/ui">
    <facets>
        <dataLoadCoordinator auto="true"/>
        <dynattrui:dynamicAttributes/>
    </facets>
    <!--...-->
</window>

After that, you need to select this screen in the Category attribute editor on the Visibility tab.

Using DynamicAttributesPanel

If an entity implements the Categorized interface, then you can use the DynamicAttributesPanel component for displaying the dynamic attributes of the entity. This component allows you to select a category for the particular entity instance and specify values of dynamic attributes of this category.

In order to use the DynamicAttributesPanel component in an edit screen, do the following:

  • Make sure the category attribute is included in the fetch plan of your categorized entity:

    <instance id="carDc"
          class="dynattr.ex1.entity.Car">
    <fetchPlan extends="_base">
        <property name="category" fetchPlan="_instance_name"/> (1)
    </fetchPlan>
    <loader/>
</instance>

  • Add the dynamicAttributesPanel visual component to the screen:

    <dynamicAttributesPanel dataContainer="carDc"
                        cols="2"
                        rows="2"
                        width="AUTO"/>

    You can specify the number of columns to display dynamic attributes using the cols parameter. Or you can use the rows parameter to specify the number of rows (in this case, the number of columns will be calculated automatically). By default, all attributes will be displayed in one column.

    dynamic attribute panel
    On the Attributes location tab of the category editor, you can more flexibly customize the position of the dynamic attributes. In this case, the values of the cols and rows parameters will be ignored.

Adding Specific Attributes Explicitly

Also, you can add dynamic attributes to a screen manually. To do this, add dynamicAttributes facet to the facets section and use attribute’s code with + prefix when binding UI components:

<data>
    <instance id="carDc"
              class="dynattr.ex1.entity.Car">
        <fetchPlan extends="_local"/>
        <loader/>
    </instance>
</data>
<facets>
    <dataLoadCoordinator auto="true"/>
    <dynattrui:dynamicAttributes/>
</facets>
<layout>
    <form id="form" dataContainer="carDc">
        <!-- ... -->
        <textField property="+PassengerNumberofseats"
                   caption="Number of seats"/>
    </form>
</layout>