/// <summary>
/// Factory method to create a random puntal style
/// </summary>
/// <returns>A puntal vector style</returns>
public static VectorStyle CreateRandomPolygonalStyle()
{
var res = new VectorStyle();
ClearPuntalStyle(res);
ClearLinealStyle(res);
RandomizePolygonalStyle(res);
return(res);
}
/// <summary>
/// Utility function to randomize lineal settings
/// </summary>
/// <param name="res">The style to randomize</param>
private static void RandomizeLinealStyle(VectorStyle res)
{
res.Line = new Pen(CreateRandomKnownColor(_rnd.Next(67, 256)), _rnd.Next(1, 3));
res.EnableOutline = _rnd.Next(0, 2) == 1;
if (res.EnableOutline)
{
res.Outline = new Pen(CreateRandomKnownColor(_rnd.Next(67, 256)), _rnd.Next((int)res.Line.Width, 5));
}
}
/// <summary>
/// Utility function to randomize puntal settings
/// </summary>
/// <param name="res">The style to randomize</param>
private static void RandomizePuntalStyle(VectorStyle res)
{
switch (_rnd.Next(2))
{
case 0:
res.Symbol = DefaultSymbol;
res.SymbolScale = 0.01f * _rnd.Next(80, 200);
break;
case 1:
res.Symbol = null;
res.PointColor = new SolidBrush(CreateRandomKnownColor(_rnd.Next(67, 256)));
res.PointSize = 0.1f * _rnd.Next(5, 20);
break;
}
}
private static void SetFillStyle(VectorStyle style, XmlNode fillSymbolizer, XmlNamespaceManager nsm)
{
string stroke = string.Empty;
string strokeWidth = string.Empty;
string strokeOpacity = string.Empty;
string strokeLinejoin = string.Empty;
string strokeLineCap = string.Empty;
string strokeDasharray = string.Empty;
string strokeDashOffset = string.Empty;
string fill = string.Empty;
string fillOpacity = string.Empty;
string pointSymbolPath = string.Empty;
var polygonFillSymbols = fillSymbolizer.SelectNodes("sld:Fill/sld:CssParameter", nsm);
if (polygonFillSymbols == null)
{
return;
}
foreach (XmlElement polygonFillSymbol in polygonFillSymbols)
{
if (polygonFillSymbol != null)
{
switch (polygonFillSymbol.GetAttribute("name"))
{
//polygon
case "fill":
fill = polygonFillSymbol.InnerXml;
break;
case "fill-opacity":
fillOpacity = polygonFillSymbol.InnerXml;
break;
}
}
}
SetStyle(style, stroke, strokeWidth, strokeOpacity, strokeLinejoin, strokeLineCap, strokeDasharray,
strokeDashOffset, fill, fillOpacity, pointSymbolPath);
//Call down to stroke style
SetStrokeStyle(style, fillSymbolizer, nsm);
}
/// <summary>
/// Utility function to randomize polygonal settings
/// </summary>
/// <param name="res"></param>
private static void RandomizePolygonalStyle(VectorStyle res)
{
switch (_rnd.Next(3))
{
case 0:
res.Fill = new SolidBrush(CreateRandomKnownColor(_rnd.Next(67, 256)));
break;
case 1:
res.Fill = new HatchBrush((HatchStyle)_rnd.Next(0, 53),
CreateRandomKnownColor(), CreateRandomKnownColor(_rnd.Next(67, 256)));
break;
case 2:
var alpha = _rnd.Next(67, 256);
res.Fill = new LinearGradientBrush(new Point(0, 0), new Point(_rnd.Next(5, 10), _rnd.Next(5, 10)),
CreateRandomKnownColor(alpha), CreateRandomKnownColor(alpha));
break;
}
}
private static void SetSymbologyForRule(VectorStyle style, XmlElement rule, XmlNamespaceManager nsm)
{
var polygonSymbolizers = rule.SelectNodes("sld:PolygonSymbolizer", nsm);
var lineSymbolizers = rule.SelectNodes("sld:LineSymbolizer", nsm);
var pointSymbolizers = rule.SelectNodes("sld:PointSymbolizer", nsm);
if (polygonSymbolizers != null)
{
if (polygonSymbolizers.Count > 0)
{
foreach (XmlElement polygonSymbolizer in polygonSymbolizers)
{
SetFillStyle(style, polygonSymbolizer, nsm);
}
}
}
if (lineSymbolizers != null)
{
if (lineSymbolizers.Count > 0)
{
foreach (XmlElement lineSymbolizer in lineSymbolizers)
{
SetStrokeStyle(style, lineSymbolizer, nsm);
}
}
}
if (pointSymbolizers != null)
{
if (pointSymbolizers.Count > 0)
{
foreach (XmlElement pointSymbolizer in pointSymbolizers)
{
SetPointStyle(style, pointSymbolizer, nsm);
}
}
}
}
/// <summary>
/// Method to add a <see cref="VectorStyle"/>
/// </summary>
/// <param name="style"></param>
public void AddStyle(VectorStyle style)
{
_styles.Add(style);
}
/// <summary>
/// Utility function to modify <paramref name="style"/> in order to prevent drawing of any puntal components
/// </summary>
/// <param name="style">The style to modify</param>
private static void ClearLinealStyle(VectorStyle style)
{
style.EnableOutline = false;
style.Line = Pens.Transparent;
style.Outline = Pens.Transparent;
}
/// <summary>
/// Method to parse the vector styles from a <see cref="XmlDocument"/>
/// </summary>
/// <param name="doc">The xml document</param>
/// <returns>A dictionary of vector styles</returns>
public static IDictionary <string, VectorStyle> ParseFeatureStyle(XmlDocument doc)
{
var styles = new Dictionary <string, VectorStyle>();
// Load SLD file
var nt = new NameTable();
var nsm = new XmlNamespaceManager(nt);
nsm.AddNamespace("sld", "http://www.opengis.net/sld");
nsm.AddNamespace("ogc", "http://www.opengis.net/ogc");
nsm.AddNamespace("xlink", "http://www.w3.org/1999/xlink");
var sldConfig = new XmlDocument(nt);
sldConfig.LoadXml(doc.OuterXml);
var featureTypeStyleEls = sldConfig.SelectNodes("//sld:FeatureTypeStyle", nsm);
if (featureTypeStyleEls == null)
{
return(null);
}
foreach (XmlElement featTypeStyle in featureTypeStyleEls)
{
var el = (XmlElement)featTypeStyle.SelectSingleNode("sld:FeatureTypeName", nsm);
var mainName = el != null ? el.InnerText : "";
var rules = featTypeStyle.SelectNodes("sld:Rule", nsm);
if (rules != null)
{
foreach (XmlElement rule in rules)
{
el = (XmlElement)rule.SelectSingleNode("sld:Name", nsm);
var name = el != null ? el.InnerText : "";
var style = new VectorStyle();
SetSymbologyForRule(style, rule, nsm);
styles.Add(mainName + ":" + name, style);
}
}
}
return(styles);
//style.AreFeaturesSelectable
//style.Enabled
//style.EnableOutline
//style.Fill
//style.HighlightFill
//style.HighlightLine
//style.HighlightOutline
//style.HighlightSymbol
//style.Line
//style.MaxVisible
//style.MinVisible
//style.Outline
//style.RenderingMode
//style.SelectFill
//style.SelectLine
//style.SelectOutline
//style.SelectSymbol
}
private static void SetStyle(
VectorStyle style,
string stroke,
string strokeWidth,
string strokeOpacity,
string strokeLinejoin,
string strokeLineCap,
string strokeDasharray,
string strokeDashOffset,
string fill,
string fillOpacity,
string pointSymbolPath
)
{
if (!String.IsNullOrEmpty(stroke))
{
var color = ColorTranslator.FromHtml(stroke);
var opacity = 255;
var width = 1f;
if (!String.IsNullOrEmpty(strokeOpacity))
{
opacity = Convert.ToInt32(Math.Round(Convert.ToDouble(strokeOpacity) / 0.0039215, 0));
if (opacity > 255)
{
opacity = 255;
}
}
if (!String.IsNullOrEmpty(strokeWidth))
{
width = Convert.ToSingle(strokeWidth);
}
Brush brush = new SolidBrush(Color.FromArgb(opacity, Convert.ToInt32(color.R), Convert.ToInt32(color.G),
Convert.ToInt32(color.B)));
var pen = new Pen(brush, width);
if (!String.IsNullOrEmpty(strokeLinejoin))
{
switch (strokeLinejoin.ToLower())
{
case "mitre":
pen.LineJoin = LineJoin.Miter;
break;
case "round":
pen.LineJoin = LineJoin.Round;
break;
case "bevel":
pen.LineJoin = LineJoin.Bevel;
break;
//case "miterclipped": // Not in SLD
// pen.LineJoin = StyleLineJoin.MiterClipped;
// break;
}
}
if (!String.IsNullOrEmpty(strokeLineCap))
{
switch (strokeLineCap.ToLower())
{
case "butt":
pen.StartCap = LineCap.Flat;
pen.EndCap = LineCap.Flat;
break;
case "round":
pen.StartCap = LineCap.Round;
pen.EndCap = LineCap.Round;
break;
case "square":
pen.StartCap = LineCap.Square;
pen.EndCap = LineCap.Square;
break;
// N.B. Loads of others not used in SLD
}
}
if (!String.IsNullOrEmpty(strokeDasharray))
{
var numbers = strokeDasharray.Split(Char.Parse(" "));
Func <string[], float[]> processor = strings =>
{
var res = new float[strings.Length];
for (var i = 0; i < strings.Length; i++)
{
res[i] = float.Parse(strings[i]);
}
return(res.ToArray());
};
pen.DashPattern = processor(numbers);
}
if (!String.IsNullOrEmpty(strokeDashOffset))
{
float dashOffset;
var success = float.TryParse(strokeDashOffset, out dashOffset);
if (success)
{
pen.DashOffset = dashOffset;
}
}
// Set pen
style.Line = pen;
}
if (!String.IsNullOrEmpty(fill))
{
Color color = ColorTranslator.FromHtml(fill);
int opacity = 255;
if (!String.IsNullOrEmpty(fillOpacity))
{
opacity = Convert.ToInt32(Math.Round(Convert.ToDouble(fillOpacity) / 0.0039215, 0));
if (opacity > 255)
{
opacity = 255;
}
}
Brush brush =
new SolidBrush(Color.FromArgb(opacity, Convert.ToInt32(color.R), Convert.ToInt32(color.G),
Convert.ToInt32(color.B)));
style.Fill = brush;
}
if (!String.IsNullOrEmpty(pointSymbolPath))
{
var source = new Uri(pointSymbolPath);
if (source.IsFile && File.Exists(source.AbsolutePath))
{
style.Symbol = new Bitmap(source.AbsolutePath);
}
else if (source.IsAbsoluteUri)
{
}
}
style.Enabled = true;
style.EnableOutline = true;
}
private static void SetStrokeStyle(VectorStyle style, XmlNode strokeSymbolizer, XmlNamespaceManager nsm)
{
string stroke = string.Empty;
string strokeWidth = string.Empty;
string strokeOpacity = string.Empty;
string strokeLinejoin = string.Empty;
string strokeLineCap = string.Empty;
string strokeDasharray = string.Empty;
string strokeDashOffset = string.Empty;
string fill = string.Empty;
string fillOpacity = string.Empty;
string pointSymbolPath = string.Empty;
var polygonStrokeSymbols = strokeSymbolizer.SelectNodes("sld:Stroke/sld:CssParameter", nsm);
if (polygonStrokeSymbols == null)
{
return;
}
foreach (XmlElement polygonStrokeSymbol in polygonStrokeSymbols)
{
if (polygonStrokeSymbol != null)
{
switch (polygonStrokeSymbol.GetAttribute("name"))
{
// line
case "stroke":
stroke = polygonStrokeSymbol.InnerXml;
break;
case "stroke-width":
strokeWidth = polygonStrokeSymbol.InnerXml;
break;
case "stroke-opacity":
strokeOpacity = polygonStrokeSymbol.InnerXml;
break;
case "stroke-linejoin": //“mitre”, “round”, and “bevel”
strokeLinejoin = polygonStrokeSymbol.InnerXml;
break;
case "stroke-linecap": //“butt”, “round”, and “square”.
strokeLineCap = polygonStrokeSymbol.InnerXml;
break;
case "stroke-dasharray":
strokeDasharray = polygonStrokeSymbol.InnerXml;
break;
case "stroke-dashoffset":
strokeDashOffset = polygonStrokeSymbol.InnerXml;
break;
}
}
}
SetStyle(style, stroke, strokeWidth, strokeOpacity, strokeLinejoin, strokeLineCap, strokeDasharray,
strokeDashOffset, fill, fillOpacity, pointSymbolPath);
}
