IMapLegend.NoDataElementFirst

Syntax

NoDataElementFirst: Boolean;

Description

The NoDataElementFirst property determines whether to display the No data element first.

Comments

Available values:

True. Display the No data element in the first position.
False. Display the No data element in the last position.

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 UiMap1 component must have a connected map that contains a map indicator only.

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

Var

Map: IMap;

Layer: IMapLayer;

Legend: IMapLegend;

Begin

Map := UiMap1.Map;

Legend := New DxMapLegend.Create As IMapLegend;

Map.View.Legend := Legend;

Legend.Visible := True;

Legend.BeginUpdate;

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

Legend.Visual := Layer.Visuals.Item(0);

Legend.NoDataElementFirst := True;

Legend.NoDataElementVisible := True;

Legend.EndUpdate;

End Sub Button1OnClick;

After executing the example the legend containing the No data element on the first position is displayed for the map indicator: