/// <summary>
/// Function to render <paramref name="feature"/> using <paramref name="style"/> and returning the area covered.
/// </summary>
/// <param name="g">The graphics object</param>
/// <param name="map">The map</param>
/// <param name="feature">The feature's geometry</param>
/// <param name="style">The style to apply</param>
protected RectangleF RenderGeometryEx(Graphics g, MapViewport map, IGeometry feature, VectorStyle style)
{
if (feature == null)
{
return(RectangleF.Empty);
}
var geometryType = feature.OgcGeometryType;
switch (geometryType)
{
case OgcGeometryType.Polygon:
if (style.EnableOutline)
{
return(VectorRenderer.DrawPolygonEx(g, (IPolygon)feature, style.Fill, style.Outline, _clippingEnabled,
map));
}
else
{
return(VectorRenderer.DrawPolygonEx(g, (IPolygon)feature, style.Fill, null, _clippingEnabled, map));
}
case OgcGeometryType.MultiPolygon:
if (style.EnableOutline)
{
return(VectorRenderer.DrawMultiPolygonEx(g, (IMultiPolygon)feature, style.Fill, style.Outline, _clippingEnabled, map));
}
return(VectorRenderer.DrawMultiPolygonEx(g, (IMultiPolygon)feature, style.Fill, null, _clippingEnabled, map));
case OgcGeometryType.LineString:
if (style.LineSymbolizer != null)
{
style.LineSymbolizer.Render(map, (ILineString)feature, g);
return(RectangleF.Empty);
}
return(VectorRenderer.DrawLineStringEx(g, (ILineString)feature, style.Line, map, style.LineOffset));
case OgcGeometryType.MultiLineString:
if (style.LineSymbolizer != null)
{
style.LineSymbolizer.Render(map, (IMultiLineString)feature, g);
return(RectangleF.Empty);
}
return(VectorRenderer.DrawMultiLineStringEx(g, (IMultiLineString)feature, style.Line, map, style.LineOffset));
case OgcGeometryType.Point:
if (style.PointSymbolizer != null)
{
return(VectorRenderer.DrawPointEx(style.PointSymbolizer, g, (IPoint)feature, map));
}
if (style.Symbol != null || style.PointColor == null)
{
return(VectorRenderer.DrawPointEx(g, (IPoint)feature, style.Symbol, style.SymbolScale, style.SymbolOffset,
style.SymbolRotation, map));
}
return(VectorRenderer.DrawPointEx(g, (IPoint)feature, style.PointColor, style.PointSize, style.SymbolOffset, map));
case OgcGeometryType.MultiPoint:
if (style.PointSymbolizer != null)
{
return(VectorRenderer.DrawMultiPointEx(style.PointSymbolizer, g, (IMultiPoint)feature, map));
}
if (style.Symbol != null || style.PointColor == null)
{
return(VectorRenderer.DrawMultiPointEx(g, (IMultiPoint)feature, style.Symbol, style.SymbolScale, style.SymbolOffset, style.SymbolRotation, map));
}
return(VectorRenderer.DrawMultiPointEx(g, (IMultiPoint)feature, style.PointColor, style.PointSize, style.SymbolOffset, map));
case OgcGeometryType.GeometryCollection:
var coll = (IGeometryCollection)feature;
var combinedArea = RectangleF.Empty;
for (var i = 0; i < coll.NumGeometries; i++)
{
IGeometry geom = coll[i];
var canvasArea = RenderGeometryEx(g, map, geom, style);
combinedArea = canvasArea.ExpandToInclude(combinedArea);
}
return(combinedArea);
}
throw new NotSupportedException();
}