MapControl.ScrollArea Property

Gets or sets a rectangular area (also called scroll area) that confines the map center point.

Namespace: DevExpress.Xpf.Map

Assembly: DevExpress.Xpf.Map.v23.2.dll

NuGet Package: DevExpress.Wpf.Map

Declaration

C#

public MapBounds ScrollArea { get; set; }

VB.NET

Public Property ScrollArea As MapBounds

Property Value

Type	Description
MapBounds	The scroll area boundaries.

Remarks

Use this property to limit scroll operations so that the map center point remains within the boundaries. To define these boundaries, specify the coordinates of the area’s top-left and bottom-right corners.

In the following animation, a rectangle depicts the scroll area boundaries and a dot indicates the map center position:

Example

This example specifies a rectangular area that confines the map center point:

In Code

XAML

<dxm:MapControl x:Name="map">
   ...
</dxm:MapControl>   

C#

using DevExpress.Xpf.Map;
//...
  private void Window_Loaded(object sender, RoutedEventArgs e) {
      map.ScrollArea = new DevExpress.Map.MapBounds(
                              new GeoPoint(44.568441, -11.877712),
                              new GeoPoint(36.219329, 4.030490));
      map.CenterPoint = new GeoPoint(40.155242, -2.912869);
      map.ZoomLevel = 4.5;
  }

VB.NET

Imports DevExpress.Xpf.Map
'...
Private Sub Window_Loaded(ByVal sender As Object, ByVal e As RoutedEventArgs)
    map.ScrollArea = New DevExpress.Map.MapBounds(New GeoPoint(44.568441, -11.877712), New GeoPoint(36.219329, 4.030490))
    map.CenterPoint = New GeoPoint(40.155242, -2.912869)
    map.ZoomLevel = 4.5
End Sub

In Markup

You can also specify the scroll area in markup. Coordinates are written in the following order: x1, y1, x2, y2, where x1, y1 are the top-left point’s coordinates, and x2, y2 are the bottom-right point’s coordinates.

XAML

<dxm:MapControl x:Name="map"
                ScrollArea="-11.877712, 44.568441, 4.030490, 36.219329"
                CenterPoint="40.155242, -2.912869" 
                ZoomLevel="4.5">
    ...
</dxm:MapControl>