IMapLegend.Draw

Syntax

Draw(Graphics: IGxGraphics; Rect: IGxRectF);

Parameters

Graphics. Graphic context for rendering.

Rect. Real rectangle where a legend is rendered.

Description

The Draw method draws a legend in the specified rectangle.

Example

Executing the example requires a form with the following components: the Button component named Button1, the MapBox component named MapBox1, the ImageBox component named ImageBox1, and the UiMap component named UiMap1. UiMap1 is a data source for MapBox1. The UiMap1 component must have a connected map that contains a map indicator only.

The example is a handler of the OnClick event for the Button1 component.

Add links to the Drawing, ExtCtrls, Forms, and Map system assemblies.

Sub Button1OnClick(Sender: Object; Args: IMouseEventArgs);
Var
    Map: IMap;
    Layer: IMapLayer;
    Legend: IMapLegend;
    BitMap: IGxBitmap;
    Graphics: IGxGraphics;
    Rect: IGxRectF;
Begin
    Map := UiMap1.Map;
    Legend := New DxMapLegend.Create As IMapLegend;
    Map.View.Legend := Legend;
    Legend.Visible := True;
    Layer := Map.Layers.FindByName("Regions");
    Legend.Visual := Layer.Visuals.Item(0);
    BitMap := GxBitmap.CreateNew(ImageBox1.ClientWidth, ImageBox1.ClientHeight, GxPixelFormat.Format32bppArgb);
    Graphics := GxGraphicsClass.FromImage(BitMap);
    Rect := New GxRectF.Create(0, 0, ImageBox1.Width, ImageBox1.Height);
    Legend.Draw(Graphics, Rect);
    ImageBox1.Image := BitMap;  
End Sub Button1OnClick;

After executing the example the ImageBox1 component stores a rendered map legend.

See also:

IMapLegend