public static void SetZoomToPoint(Map map, Point point, int zoomAdjustment)
{
ICoordinateService coordinateService = CoordinateServiceProvider.GetService(map);
Point center = map.SpatialReference.GeographicToLogical(map.Center);
Location newCenter = map.Center;
IMapSource mode = map.Provider.CurrentSource;
Point sourceLogical = coordinateService.PixelToLogical(point);
Location sourcePoint = coordinateService.PixelToGeographic(point);
map.ZoomLevel += zoomAdjustment;
Point currentLogical = coordinateService.PixelToLogical(point);
Location currentPoint = coordinateService.PixelToGeographic(point);
if (mode == map.Provider.CurrentSource)
{
Point shift = new Point(sourceLogical.X - currentLogical.X, sourceLogical.Y - currentLogical.Y);
center.X += shift.X;
center.Y += shift.Y;
newCenter = map.SpatialReference.LogicalToGeographic(center);
}
else
{
if (map.Center.Longitude < sourcePoint.Longitude)
{
newCenter.Longitude = map.Center.Longitude + sourcePoint.Longitude - currentPoint.Longitude;
}
else
{
newCenter.Longitude = map.Center.Longitude - currentPoint.Longitude + sourcePoint.Longitude;
}
if (map.Center.Latitude < sourcePoint.Latitude)
{
newCenter.Latitude = map.Center.Latitude + sourcePoint.Latitude - currentPoint.Latitude;
}
else
{
newCenter.Latitude = map.Center.Latitude - currentPoint.Latitude + sourcePoint.Latitude;
}
}
map.Center = newCenter;
}