private void Zoom(double amount)
{
IExtents2D ext = (IExtents2D)MapView.ViewEnvelope.Clone();
double dx, dy;
dx = ext.Width * amount / 2;
dy = ext.Height * amount / 2;
ICoordinate2D c = (ICoordinate2D)ext.Center;
MapView.ZoomToWorldBounds(ext.Factory.CreateExtents2D(c.X - dx, c.Y - dy, c.X + dx, c.Y + dy));
}
protected virtual void SetEmpty()
{
_coord = null;
_hasValue = false;
}
/// <summary>
/// Initializes a new Point
/// </summary>
/// <param name="coordinate">The coordinate used to define the point.</param>
internal protected Point(ICoordinate coordinate)
{
_coord = coordinate as ICoordinate2D;
SetNotEmpty();
}
/// <summary>
/// Initializes a new Point
/// </summary>
/// <param name="x">X coordinate</param>
/// <param name="y">Y coordinate</param>
internal protected Point(GeometryFactory factory, Double x, Double y)
{
_coord = (ICoordinate2D)factory.CoordinateFactory.Create(x, y);
Factory = factory;
SetNotEmpty();
}
