windowsforms-devexpress-dot-xtramap-dot-geomapcoordinatesystem-1db2bf56.md
Gets or sets a value that indicates which map items can be circularly scrolled.
Namespace : DevExpress.XtraMap
Assembly : DevExpress.XtraMap.v25.2.dll
NuGet Package : DevExpress.Win.Map
[DefaultValue(CircularScrollingMode.None)]
public CircularScrollingMode CircularScrollingMode { get; set; }
<DefaultValue(CircularScrollingMode.None)>
Public Property CircularScrollingMode As CircularScrollingMode
| 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.
|
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:
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);
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:
See Also