IMapVisualIconProperty.Scale

Syntax

Description

The Scale property determines a factor scale.

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.The file system should include the files C:\bad.gif and C:\good.gif that contain images.

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

Var

Map: IMap;

Layer: IMapLayer;

ImageVisual: IMapImageVisual;

ImageProp: IMapVisualIconProperty;

Scale: IMapIconScale;

Begin

Map := UiMap1.Map;

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

ImageVisual := Layer.Visuals.AddImageVisual;

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

ImageProp := ImageVisual.Image;

ImageProp.DataAdapter := ImageVisual.DataAdapter;

ImageVisual.Height.Value := 3;

ImageVisual.Width.Value := 3;

ImageProp.Dependent := True;

Scale := ImageProp.Scale;

Scale.Count := 1;

Scale.Value(0) := 50;

Scale.Greater(0) := GxImage.FromFile("C:\bad.gif");

Scale.Less(0) := GxImage.FromFile("C:\good.gif");

End Sub Button1OnClick;

After executing the example the icon factor, that is 4 pixels long and wide, is added to the Regions layer.The factor icon is determined by the scale: