ElementRule

ElementRule allows definition of items through an explicit property Items.

Example

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                  <
                  Rules
                  >
    <ElementRule Items="{MultiBinding Source={Binding ItemId=Tube}, Filter=Conditional, FilterParameter=${Binding Contents.Water.Amount, Converter=GreaterThan, ConverterParameter=10}}">
        <ApplyAction>
            <Setter Target="{Binding IsClickable}" Value="False" />
        </Apply>
        <RevertAction>
            <Setter Target="{Binding IsClickable}" Value="True" />
        </Revert>
    </ElementRule>
</Rules>

Example above sets IsClickable property of every tube that has more than 10 water to false. Tube becomes a DataContext of ApplyAction and RevertAction, which is why its properties are accessible through a binding with a single property as a path. If any tube affected by the rule has some water removed and no longer satisfies filter condition, RevertAction is invoked.