IMapPieVisual.StartAngle

Syntax

StartAngle: Integer;

Description

The StartAngle property determines the initial rotation angle of the indicator. The left image shows an indicator with the initial rotation angle equal to zero, the right image shows an indicator with the 90 degrees angle:

Example

Executing the example requires a form, a button named Button1 on the form, the UiMap component named UiMap1 that is a data source for the MapBox component. The map must be connected to the UiMap1 component. The VisualDataAdapter class, that creates a dynamic data source, must also be implemented. The class example is contained in the IMapVisual.DataAdapter property description.

Sub Button1OnClick(Sender: Object; Args: IMouseEventArgs);

Var

Map: IMap;

Layer: IMapLayer;

PieVisual: IMapPieVisual;

Color: IMapVisualColorProperty;

Collection: IMapColorCollection;

Begin

Map := UiMap1.Map;

Layer := Map.Layers.FindByName("Regions");

BarVisual := Layer.Visuals.AddBarVisual;

BarVisual.DataAdapter := New VisualDataAdapter.Create As IMapDynamicDataAdapter;

Color := PieVisual.Color;

Color.DataAdapter := PieVisual.DataAdapter;

Color.Dependent := False;

Collection := Color.Values;

Collection.Count := 2;

Collection.Item(0) := GxColor.FromName("Red");

Collection.Item(1) := GxColor.FromName("Blue");

PieVisual.Radius.Value := 2.5;

PieVisual.StartAngle:= 90;

End Sub Button1OnClick;

After executing the example, the pie indicator is added to the Regions layer, red and blue colors are used to hatch this indicator. The initial angle of indicator rotation is 90 degrees.