IVZTreeMap.SizeVisual

Syntax

Description

The SizeVisual property determines visualizer used to set size of tree map child items.

Example

Executing the example requires that the repository contains an express report with the EXP identifier. To enable visualizer used to set size of map tree children, open this express report and go to the Selection tab on the side panel. Then open the Metrics dimension tab and click the Size button, select one of the items available in the list:

The module containing the example should have links to the Express, Metabase and Visualizators system assemblies. The specified procedure should be called from the Main entry point.

Transform a set of numbers by the custom transformer used to increase the input value as much as 20 times:

// Determine custom data transformer
Class MyAdapter: object, IVZDataAdapter
    // Input value is to be increased 20-fold
    Function GetData(Value: Variant): Variant;
        Begin
        Return Value * 20
    End Function GetData;
End Class MyAdapter;

Sub UserProc;
Var
    Metabase: IMetabase; // Metabase
    EaxAnalyzer: IEaxAnalyzer; // Express report
    TreeMap: IVZTreeMap; // Tree map
    SizeVisual: IVZNumericVisual; // Visualizer of bubble chart elements' size
    DataSourceMapping: IVZDataSourceMapping; // Settings for data mapping
    DataTransformer: IVZDataAdapter; // Data transformer
Begin
    // Get metabase object
    Metabase := MetabaseClass.Active;
    // Get express report object
    EaxAnalyzer := Metabase.ItemById("EXP").Edit As IEaxAnalyzer;
    // Get tree map
    TreeMap := EaxAnalyzer.TreeMap.TreeMap;
    // Get visualizer of map tree elements' size
    SizeVisual := TreeMap.SizeVisual;
    // Get settings for data mapping
    DataSourceMapping := SizeVisual.NumericMapping;
    // Set mapping type "Data transformer"
    DataSourceMapping.MappingType := VisualizatorDataMappingType.DataMappingTransformer;
    // Create and set custom data transformer
    DataTransformer := New MyAdapter.Create;
    DataSourceMapping.DataTransformer := DataTransformer As IVZDataAdapter;
    Debug.WriteLine("Data transformation:");
    Debug.IndentLevel := 1;
    Debug.WriteLine("Input: -0.05, output: " +
        ((DataTransformer.GetData(-0.05)) As Double).ToString);
    Debug.WriteLine("Input: 0, output: " +
        ((DataTransformer.GetData(0)) As Double).ToString);
    Debug.WriteLine("Input: 0.05, output: " +
            ((DataTransformer.GetData(0.05)) As Double).ToString);
    Debug.WriteLine("Input: 5, output: " +
            ((DataTransformer.GetData(5)) As Double).ToString);
    Debug.WriteLine("Input: 1000, output: " +
            ((DataTransformer.GetData(1000)) As Double).ToString);
    // Set visualizer used to determine bubble tree element size
    TreeMap.SizeVisual := SizeVisual;
End Sub UserProc;

After executing the example, the custom transformer is created used to increase output value as much as 20 times, the development environment console window shows results of number transformation: -0.05, 0, 0.05, 5 and 1000:

Data transformation:

Input: -0.05, ouput: -1

Input: 0, output: 0

Input: 0.05, output: 1

Input: 5, output: 100

Input: 1000, output: 20000