Adobe® Flex® 4 Language Reference
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mx.collections 
SummaryField 
Packagemx.collections
Classpublic class SummaryField
InheritanceSummaryField Inheritance Object
Deprecated Since 4.0: Please Use SummaryField2

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The SummaryField class represents a single property in a SummaryRow instance. Each SummaryRow instance specifies one or more SummayField instances that are used to create a data summary.

Use the dataField property to specify the data field used to generate the summary, the label property to specify the name of the data field created to hold the summary data, and the operation property to specify how to create the summary for numeric fields. You can specify one of the following values: SUM, MIN, MAX, AVG, or COUNT.

The following example creates summary rows based on two fields of the data provider of the AdvancedDataGrid control:

  <mx:AdvancedDataGrid id="myADG" 
    initialize="gc.refresh();"> 
    <mx:dataProvider>
      <mx:GroupingCollection id="gc" source="{dpFlat}">
        <mx:Grouping>
          <mx:GroupingField name="Region">
            <mx:summaries>
              <mx:SummaryRow summaryPlacement="group">
                <mx:fields>
                  <mx:SummaryField dataField="Actual" 
                    label="Min Actual" operation="MIN"/>
                  <mx:SummaryField dataField="Actual" 
                    label="Max Actual" operation="MAX"/>
                </mx:fields>
              </mx:SummaryRow>
            </mx:summaries>
          </mx:GroupingField>
          <mx:GroupingField name="Territory">
            <mx:summaries>
              <mx:SummaryRow summaryPlacement="group">
                <mx:fields>
                  <mx:SummaryField dataField="Actual" 
                    label="Min Actual" operation="MIN"/>
                  <mx:SummaryField dataField="Actual" 
                    label="Max Actual" operation="MAX"/>
                </mx:fields>
              </mx:SummaryRow>
            </mx:summaries>
          </mx:GroupingField>
        </mx:Grouping>
      </mx:GroupingCollection>
    </mx:dataProvider> 
 
    <mx:columns>
      <mx:AdvancedDataGridColumn dataField="Region"/>
      <mx:AdvancedDataGridColumn dataField="Territory_Rep"
        headerText="Territory Rep"/>
      <mx:AdvancedDataGridColumn dataField="Actual"/>
      <mx:AdvancedDataGridColumn dataField="Estimate"/>
      <mx:AdvancedDataGridColumn dataField="Min Actual"/>
      <mx:AdvancedDataGridColumn dataField="Max Actual"/>
    </mx:columns>
  </mx:AdvancedDataGrid>
  

This Class has been deprecated and replaced by a new Class SummaryField2. Properties operation and summaryFunction are not present in the Class SummaryField2. A new property summaryOperation is introduced in SummaryField2.

See also



Public Properties
 PropertyDefined By
 Inheritedconstructor : Object
A reference to the class object or constructor function for a given object instance.
Object
  dataField : String
Data field for which the summary is computed.
SummaryField
  label : String
The property used inside the summary object, an instance of the SummaryObject class, to hold summary information.
SummaryField
  operation : String = "SUM"
The function that should be performed on the children.
SummaryField
 Inheritedprototype : Object
[static] A reference to the prototype object of a class or function object.
Object
  summaryFunction : Function
Specifies a callback function to compute a custom data summary.
SummaryField
Public Methods
 MethodDefined By
  
SummaryField(dataField:String = null, operation:String = "SUM")
Constructor.
SummaryField
 Inherited
Indicates whether an object has a specified property defined.
Object
 Inherited
Indicates whether an instance of the Object class is in the prototype chain of the object specified as the parameter.
Object
 Inherited
Indicates whether the specified property exists and is enumerable.
Object
 Inherited
Sets the availability of a dynamic property for loop operations.
Object
 Inherited
Returns the string representation of this object, formatted according to locale-specific conventions.
Object
 Inherited
Returns the string representation of the specified object.
Object
 Inherited
Returns the primitive value of the specified object.
Object
Property Detail

dataField

property
public var dataField:String

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Data field for which the summary is computed.

label

property 
public var label:String

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The property used inside the summary object, an instance of the SummaryObject class, to hold summary information.

For example, if you set the label property to "Summary", then the computed summary is placed in a property named "Summary" in the summary object. The property of the SummaryObject instance containing the summary data will appear as below:

{Summary:1000}

See also

operation

property 
public var operation:String = "SUM"

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

The function that should be performed on the children. You can specify one of the following values for numeric fields: SUM, MIN, MAX, AVG, or COUNT.

The default value is SUM.

summaryFunction

property 
public var summaryFunction:Function

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Specifies a callback function to compute a custom data summary.

You use this property with the SummaryRow.summaryObjectFunction property, which defines an instance of the SummaryObject class used to collect summary data for display in the AdvancedDataGrid control.

The function signature should be as follows:

      function mySummaryFunction(iterator:IViewCursor, dataField:String, operation:String):Object

The built-in summary functions for SUM, MIN, MAX, AVG, and COUNT all return a Number containing the summary data.

See also

Constructor Detail

SummaryField

()Constructor
public function SummaryField(dataField:String = null, operation:String = "SUM")

Language Version: ActionScript 3.0
Product Version: Flex 3
Runtime Versions: Flash Player 9, AIR 1.1

Constructor.

Parameters
dataField:String (default = null) — Data field for which the summary is computed.
 
operation:String (default = "SUM") — The function that should be performed on the children. You can specify one of the following values for numeric fields: SUM, MIN, MAX, AVG, or COUNT.