Language Version : | ActionScript 3.0 |
Runtime Versions : | Flash Player 10, AIR 1.5 |
The SummaryField2 class represents a single property in a SummaryRow instance.
Each SummaryRow instance specifies one or more SummayField2 instances
that are used to create a data summary.
Note: In the previous release of Flex, you used the SummaryField class
to create summary data.
The SummaryField2 class is new for Flex 4 and provides better performance than SummaryField.
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 summaryOperation
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
.
Or you can specify an ISummaryCalculator implementation to calculate the summaries.
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:SummaryField2 dataField="Actual"
label="Min Actual" summaryOperation="MIN"/>
<mx:SummaryField2 dataField="Actual"
label="Max Actual" summaryOperation="MAX"/>
</mx:fields>
</mx:SummaryRow>
</mx:summaries>
</mx:GroupingField>
<mx:GroupingField name="Territory">
<mx:summaries>
<mx:SummaryRow summaryPlacement="group">
<mx:fields>
<mx:SummaryField2 dataField="Actual"
label="Min Actual" summaryOperation="MIN"/>
<mx:SummaryField2 dataField="Actual"
label="Max Actual" summaryOperation="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>
Show MXML Syntax
Hide MXML Syntax The
<mx.SummaryField2>
inherits all the tag attributes of its superclass,
and defines the following tag attributes:
<mx:SummaryField2
Properties
dataField="No default"
label="No default"
summaryOperation="SUM"
/>
public var dataField:String
Language Version : | ActionScript 3.0 |
Runtime Versions : | Flash Player 10, AIR 1.5 |
Data field for which the summary is computed.
public var label:String
Language Version : | ActionScript 3.0 |
Runtime Versions : | Flash Player 10, AIR 1.5 |
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
public var summaryOperation:Object = SUM
Language Version : | ActionScript 3.0 |
Runtime Versions : | Flash Player 10, AIR 1.5 |
The summary performed on the children.
The value of this property can be one of the following:
- For numeric fields:
SUM
, MIN
,
MAX
, AVG
, or COUNT
.
- An instance of a class that implements the custom ISummaryCalculator interface
to calculate a custom summary.
The default value is SUM
.
See also
public function SummaryField2(dataField:String = null, summaryOperation:Object = SUM)
Language Version : | ActionScript 3.0 |
Runtime Versions : | Flash Player 10, AIR 1.5 |
Constructor.
Parameters | dataField:String (default = null ) — Data field for which the summary is computed.
|
|
| summaryOperation:Object (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 .
Or you can specify an ISummaryCalculator implementation to calculate the summaries.
|
Mon Jul 9 2012, 07:18 PM -04:00