/// <summary>
/// Converts a <b>Point</b> to a <see cref="System.Drawing.PointF">PointF</see>.
/// </summary>
/// <param name="point">The <b>Point</b> to convert.</param>
/// <returns>A <see cref="System.Drawing.PointF">PointF</see> with the same values x and y values as <i>point</i>.</returns>
public static PointF PointToPointF(Point point)
{
return(new PointF((float)point.getX(), (float)point.getY()));
}
/// <summary>
/// Converts a <b>Geometry</b> object to its representation as a <see cref="System.Drawing.Drawing2D.GraphicsPath">GraphicsPath</see>.
/// </summary>
/// <param name="geometry">The <b>Geometry</b> object.</param>
/// <returns>The <see cref="System.Drawing.Drawing2D.GraphicsPath">GraphicsPath</see> representation of the supplied <b>Geometry</b>.</returns>
/// <exception cref="ArgumentNullException"><i>geometry</i> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="InvalidOperationException"><i>geometry</i> cannot be converted to a <see cref="System.Drawing.Drawing2D.GraphicsPath">GraphicsPath</see>.</exception>
public static GraphicsPath GeometryToGraphicsPath(Geometry geometry)
{
if (geometry == null)
{
throw new ArgumentNullException("geometry");
}
GraphicsPath path = new GraphicsPath();
if (geometry is GeometryCollection)
{
GeometryCollection geometries = (GeometryCollection)geometry;
for (int i = 0; i < geometries.getNumGeometries(); i++)
{
path.AddPath(GeometryToGraphicsPath(geometries.getGeometryN(i)), false);
}
}
else if (geometry is Point)
{
Point point = (Point)geometry;
path.AddRectangle(new RectangleF((float)point.getX() - .5f, (float)point.getY() - .5f, 1, 1));
}
else if (geometry is Polygon)
{
Polygon polygon = (Polygon)geometry;
path.AddPath(GeometryToGraphicsPath(polygon.getExteriorRing()), true);
for (int i = 0; i < polygon.getNumInteriorRing(); i++)
{
path.AddPath(GeometryToGraphicsPath(polygon.getInteriorRingN(i)), false);
}
}
else if (geometry is LinearRing)
{
Coordinate[] coords = geometry.getCoordinates();
PointF[] points = new PointF[coords.Length];
for (int i = 0; i < points.Length; i++)
{
PointF point = new PointF((float)coords[i].x, (float)coords[i].y);
points[i] = point;
}
path.AddPolygon(points);
}
else if (geometry is LineString)
{
Coordinate[] coords = geometry.getCoordinates();
PointF[] points = new PointF[coords.Length];
for (int i = 0; i < points.Length; i++)
{
PointF point = new PointF((float)coords[i].x, (float)coords[i].y);
points[i] = point;
}
path.AddLines(points);
}
else
{
throw new InvalidOperationException("Cannot convert this to a GDI Graphics path");
}
Debug.Assert(path != null, "Should not return null.");
return(path);
}
/// <summary>
/// Converts a <b>Geometry</b> object to its projected representation as a <see cref="System.Drawing.Drawing2D.GraphicsPath">GraphicsPath</see>.
/// </summary>
/// <param name="geometry">The <b>Geometry</b> object.</param>
/// <param name="projection">The projection to use.</param>
/// <returns>The <see cref="System.Drawing.Drawing2D.GraphicsPath">GraphicsPath</see> representation of the supplied <b>Geometry</b>.</returns>
/// <exception cref="ArgumentNullException"><i>geometry</i> is a null reference (Nothing in Visual Basic).</exception>
/// <exception cref="InvalidOperationException"><i>geometry</i> cannot be converted to a <see cref="System.Drawing.Drawing2D.GraphicsPath">GraphicsPath</see>.</exception>
public static GraphicsPath ProjectGeometryToGraphicsPath(Geometry geometry, ICoordinateTransformation projection)
{
if (geometry == null)
{
throw new ArgumentNullException("geometry");
}
GraphicsPath path = new GraphicsPath();
if (geometry is GeometryCollection)
{
GeometryCollection geometries = (GeometryCollection)geometry;
for (int i = 0; i < geometries.getNumGeometries(); i++)
{
path.AddPath(GeometryHelper.ProjectGeometryToGraphicsPath(geometries.getGeometryN(i), projection), false);
}
}
else if (geometry is Point)
{
Point point = (Point)geometry;
PointF point2 = new PointF((float)point.getX(), (float)point.getY());
if (projection != null)
{
point2 = ProjectionHelper.Project(point2, projection);
}
float x = point2.X;
float y = point2.Y;
//HACK: need to determine this 15,000 number
path.AddRectangle(new RectangleF(x, y, 15000, 15000));
}
else if (geometry is Polygon)
{
Polygon polygon = (Polygon)geometry;
path.AddPath(GeometryHelper.ProjectGeometryToGraphicsPath(polygon.getExteriorRing(), projection), true);
for (int i = 0; i < polygon.getNumInteriorRing(); i++)
{
path.AddPath(GeometryHelper.ProjectGeometryToGraphicsPath(polygon.getInteriorRingN(i), projection), false);
}
}
else if (geometry is LinearRing)
{
Coordinate[] coords = geometry.getCoordinates();
PointF[] points = new PointF[coords.Length];
bool project = projection != null;
for (int i = 0; i < points.Length; i++)
{
PointF point = new PointF((float)coords[i].x, (float)coords[i].y);
if (project)
{
point = ProjectionHelper.Project(point, projection);
}
points[i] = point;
}
path.AddPolygon(points);
}
else if (geometry is LineString)
{
Coordinate[] coords = geometry.getCoordinates();
PointF[] points = new PointF[coords.Length];
bool project = projection != null;
for (int i = 0; i < points.Length; i++)
{
PointF point = new PointF((float)coords[i].x, (float)coords[i].y);
if (project)
{
point = ProjectionHelper.Project(point, projection);
}
points[i] = point;
}
path.AddLines(points);
}
else
{
throw new InvalidOperationException("Cannot convert this to a GDI Graphics path");
}
Debug.Assert(path != null, "Should not return null.");
return(path);
}