Oracle Fusion Middleware Data Visualization Tools Tag Reference for Oracle ADF Faces
12c (12.2.1.2)
E76719-01

<dvt:attributeGroups>

dvt:attributeGroups attributeGroups attribute groups

UIComponent class: oracle.adf.view.faces.bi.component.attributeGroups.UIAttributeGroups
Component type: oracle.dss.adf.attributeGroups.AttributeGroups

The attributeGroups tags are used to generate stylistic attribute values such as colors or shapes based on categorical bucketing of a data set. Given the column in the model to group by, the attributeGroups can produce style values for each unique value ("group") in the data.

Types

The type of stylistic attribute to produce values for can be specified using the type property on the attributeGroups tag. The currently supported types are: color, shape, pattern, opacity, scaleX, and scaleY. These can be combined in a space-delimited list to generate multiple stylistic attributes for each unique data value.

Customization

The default style values that get generated are defined using skinning keys. Each attributeGroups type has a default ramp defined in the skin, and these can be customized by setting the index-based selectors to the desired values. For example:

       af|dvt-attributeGroups::shape1 {
           -tr-shape: square;
       }
       
       af|dvt-attributeGroups::shape2 {
           -tr-shape: circle;
       }

The style values can also be specified through the tags, by using <f:attribute> child tags to define the styles. In this case, the name attribute specifies the attributeGroups type being overridden and the index of the override, and the value attribute specifies the overridden value. For example, to override the first color of the ramp, an <f:attribute> tags with name="color1" and value="#FF0000" would be used. When <f:attribute> tags are used, they are used instead of, not in addition to, the style definition from the skinning keys.

Override Rules

The attributeGroups tag has child "rule" tags that can be used to override the values provided by the attributeGroups. There are two types of rules:

attributeMatchRule: replace an attribute when the data matches a certain value
attributeExceptionRule: replace an attribute value with another when a particular boolean condition is met

Sample

This is an example of how attributeGroups can be used with the Thematic Map component:

       <dvt:thematicMap id="map" basemap="usa">
         <dvt:areaLayer id="al1" layer="states">
             <dvt:areaDataLayer id="adl1" value="#{bean.model}" var="row" ...>
                <dvt:areaLocation id="al1" name="#{row.name}">
                    <!--Each stamped marker gets assigned a color and shape from the attributeGroups-->
                    <dvt:marker id="m1">
                        <dvt:attributeGroups id="ag1" type="shape color" value="#{row.category}"/>
                    </dvt:marker>
                </dvt:areaLocation>
             </dvt:areaDataLayer>
         </dvt:areaLayer>
       </dvt:thematicMap>

Relationship with other tags

The <dvt:attributeGroups> tag can have the following children:

Events

Type	Phases	Description
org.apache.myfaces.trinidad.event.AttributeChangeEvent	Invoke Application, Apply Request Values	Event delivered to describe an attribute change. Attribute change events are not delivered for any programmatic change to a property. They are only delivered when a renderer changes a property without the application's specific request. An example of an attribute change event might include the width of a column that supported client-side resizing.

Attributes

Name	Type	Supports EL?	Description
attributeChangeListener	javax.el.MethodExpression	Only EL	a method reference to an attribute change listener. Attribute change events are not delivered for any programmatic change to a property. They are only delivered when a renderer changes a property without the application's specific request. An example of an attribute change events might include the width of a column that supported client-side resizing.
attributeType	String	Yes	Valid Values: discrete, continuous Default Value: discrete The attribute type for which to generate values. Valid values are: "discrete" (default): Indicates that values should be classified into discrete categories. "continuous": Indicates that values should be classified across a range of continuous values. Only the color attribute is currently supported when using continuous attributes.
binding	oracle.adf.view.faces.bi.component.attributeGroups.UIAttributeGroups	Only EL	an EL reference that will store the component instance on a bean. This can be used to give programmatic access to a component from a backing bean, or to move creation of the component to a backing bean.
discriminant	String	Yes	The discriminant of this component. This optional value allows components on the same page using attribute groups to share attribute groupings by setting identical discriminant values. Components with no discriminant specified will not share groupings with any other component.
id	String	No	the identifier for the component
label	String	Yes	A text label for use in the legend. Not required, but strongly recommended if the component has a legend.
maxLabel	String	Yes	The label for the maximum bounds of the component. This value only applies when the attributeType is set to "continuous". If no value is specified, the maximum value is used instead.
maxValue	Object	Yes	The maximum bounds of this component. This value only applies when the attributeType is set to "continuous". If no value is specified, the maximum data value is used instead.
minLabel	String	Yes	The label for the minimum bounds of the component. This value only applies when the attributeType is set to "continuous". If no value is specified, the minimum value is used instead.
minValue	Object	Yes	The minimum bounds of this component. This value only applies when the attributeType is set to "continuous". If no value is specified, the minimum data value is used instead.
rendered	boolean	Yes	Default Value: true Specifies whether the component is rendered. The default value is true.
sectionLabel	String	Yes	A section label for use in the legend
type	String	Yes	A space-delimited list of stylistic attribute types to generate values for. Valid values are: "shape" "color" "pattern" "opacity" "scaleX" "scaleY" The valid types may vary depending on the parent of the attributeGroups tag.
value	String	Yes	The value from the data model to group by