GeoMapCoordinateSystem.CircularScrollingMode Property

Gets or sets a value that indicates which map items can be circularly scrolled.

Namespace: DevExpress.XtraMap

Assembly: DevExpress.XtraMap.v24.2.dll

Declaration

C#

[DefaultValue(CircularScrollingMode.None)]
public CircularScrollingMode CircularScrollingMode { get; set; }

VB.NET

<DefaultValue(CircularScrollingMode.None)>
Public Property CircularScrollingMode As CircularScrollingMode

Property Value

Type	Default	Description
CircularScrollingMode	None	The value that indicates which map items are available for circular scrolling.

Available values:

Name	Description
None	No map elements are circularly scrolled.
TilesAndVectorItems	Tiles and vector items are circularly scrolled.

Remarks

Note that, a map shape should fulfill the following condition to cross the 180th meridian: one or several points’ longitudes should exceed the 180 (-180) limit:

C#

MapPolygon polygon = new MapPolygon();
polygon.Points.Add(new GeoPoint(10, -170));
polygon.Points.Add(new GeoPoint(10, 170));
polygon.Points.Add(new GeoPoint(-10, 170));
polygon.Points.Add(new GeoPoint(-10, -170));
vectorItemStorage.Items.Add(polygon);

// Point longitudes enclose the 180 meridian.
MapPolygon polygonCross180 = New MapPolygon();
polygonCross180.Fill = Color.Orange;
polygonCross180.Points.Add(new GeoPoint(30, 190));
polygonCross180.Points.Add(new GeoPoint(30, 170));
polygonCross180.Points.Add(new GeoPoint(20, 170));
polygonCross180.Points.Add(new GeoPoint(20, 190));
vectorItemStorage.Items.Add(polygon180);

VB.NET

Dim polygon = New MapPolygon
polygon.Points.Add(New GeoPoint(10, -170))
polygon.Points.Add(New GeoPoint(10, 170))
polygon.Points.Add(New GeoPoint(-10, 170))
polygon.Points.Add(New GeoPoint(-10, -170))
vectorItemStorage.Items.Add(polygon)

' Point longitudes enclose the 180 meridian.
Dim polygonCross180 = New MapPolygon
polygonCross180.Fill = Color.Orange
polygonCross180.Points.Add(New GeoPoint(30, 190))
polygonCross180.Points.Add(New GeoPoint(30, 170))
polygonCross180.Points.Add(New GeoPoint(20, 170))
polygonCross180.Points.Add(New GeoPoint(20, 190))
vectorItemStorage.Items.Add(polygonCross180)

The code above produces the following image: