private void RenderPointLabel(TextSymbolizer textSymbolizer, Feature feature)
{
//TODO labels could be not strings
var str = feature.Attributes.Exists(textSymbolizer.LabelAttribute) ? feature.Attributes[textSymbolizer.LabelAttribute] as string : null;
if (string.IsNullOrWhiteSpace(str))
{
return;
}
var emSize = Graphics.DpiY * textSymbolizer.FontSize / 72;
//ref http://msdn.microsoft.com/en-us/library/xwf9s90b(v=vs.110).aspx
var font = FontCache[textSymbolizer];
var ascent = emSize * font.FontFamily.GetCellAscent(FontStyle.Bold) / font.FontFamily.GetEmHeight(FontStyle.Bold);
var coord = Project(feature.Geometry.Coordinates)[0];
var size = new SizeF(Graphics.MeasureString(str, font).Width, ascent);
var offset = new SizeF();
switch (textSymbolizer.Alignment)
{
case ContentAlignment.MiddleCenter:
//no offset
break;
case ContentAlignment.TopRight:
offset = new SizeF(size.Width * 0.5f, -size.Height * 0.5f);
break;
default:
throw new NotImplementedException();
}
TryRenderText(textSymbolizer, feature, emSize, str, coord, offset, size, -Config.Angle);
}
private TextSymbolizer CreateTextSymbolizer(NodePropertyValue[] properties)
{
TextSymbolizer symText = new TextSymbolizer();
symText.Clip = true;
symText.TextLayout.Alignment = TextAlignment.CenterAligned;
GeometryTransformInfo geomTrans = new GeometryTransformInfo();
LabelPlacementInfo lpi = new LabelPlacementInfo();
lpi.Symbolizer = (int)SymbolizerType.Text;
TextLayoutBlock textBlock = new TextLayoutBlock();
string textTransform = null;
int blockIndex = -1;
int nProps = properties.Length;
NodePropertyValue pv = null;
try
{
for (int i = 0; i < nProps; i++)
{
pv = properties[i];
switch (pv.Name)
{
case "text-name":
if (pv.Value != null)
{
string textExpr = ToExpression(pv.Value);
if (!string.IsNullOrEmpty(textTransform))
textExpr = GetTextTransform(textExpr, textTransform);
textBlock.TextExpression = textExpr;
// TODO
if (textBlock.TextExpression == string.Empty)
symText.Enabled = false;
blockIndex++;
if (blockIndex > 0)
textBlock = new TextLayoutBlock();
symText.TextLayout.Blocks.Add(textBlock);
}
break;
case "text-face-name":
SetFontName(textBlock, pv.Value);
break;
case "text-transform":
if (string.IsNullOrEmpty(textBlock.TextExpression))
textTransform = pv.Value;
else
textBlock.TextExpression = GetTextTransform(textBlock.TextExpression, pv.Value);
break;
case "text-fill":
Color clr = ColorUtility.FromHtml(pv.Value);
textBlock.TextFormat.TextStyle.Color = clr;
if (clr.A != 255)
textBlock.TextFormat.TextStyle.Opacity = clr.A / 255.0F;
break;
case "text-opacity":
textBlock.TextFormat.TextStyle.Opacity = Convert.ToSingle(pv.Value);
break;
case "text-size":
textBlock.TextFormat.TextStyle.Font.Size = Convert.ToSingle(pv.Value);
break;
case "text-halo-radius":
textBlock.TextFormat.TextStyle.Halo.Radius = Convert.ToSingle(pv.Value);
break;
case "text-halo-fill":
Color clr2 = ColorUtility.FromHtml(pv.Value);
textBlock.TextFormat.TextStyle.Halo.Color = clr2;
if (clr2.A != 255)
textBlock.TextFormat.TextStyle.Halo.Opacity = clr2.A / 255F;
break;
case "text-halo-opacity": // This property does not exist in the specification.
textBlock.TextFormat.TextStyle.Halo.Opacity = Convert.ToSingle(pv.Value);
break;
case "text-halo-rasterizer":
// TODO
break;
case "text-ratio":
//TODO
break;
case "text-clip":
symText.Clip = Convert.ToBoolean(pv.Value);
break;
case "text-align":
textBlock.TextFormat.TextAlignment = ToTextAlignment(pv.Value);
break;
case "text-horizontal-alignment":
// TODO
break;
case "text-vertical-alignment":
// TODO
break;
case "text-wrap-width":
textBlock.TextFormat.TextWrapping.MaxWidth = Convert.ToUInt32(pv.Value);
textBlock.TextFormat.TextWrapping.Mode = Drawing.Text.TextWrapMode.WrapByMaxWidthPixels;
break;
case "text-wrap-before":
TextWrapping tw = textBlock.TextFormat.TextWrapping;
if (tw.Characters == null || tw.Characters.Length == 0)
tw.Characters = new WrapCharacter[] { new WrapCharacter() };
tw.Characters[0].WrapType = CharacterWrapType.Before;
break;
case "text-wrap-character":
TextWrapping tw2 = textBlock.TextFormat.TextWrapping;
if (tw2.Characters == null || tw2.Characters.Length == 0)
tw2.Characters = new WrapCharacter[] { new WrapCharacter() };
tw2.Characters[0].Character = pv.Value;
break;
case "text-character-spacing":
textBlock.TextFormat.TextSpacing.CharacterSpacing = Convert.ToSingle(pv.Value);
break;
case "text-line-spacing":
textBlock.TextFormat.TextSpacing.Leading = Convert.ToSingle(pv.Value);
break;
case "text-allow-overlap":
symText.LabelBehaviour.AllowOverlap = Convert.ToBoolean(pv.Value);
break;
case "text-min-distance":
symText.LabelBehaviour.CollisionMeasures.Add(string.Format("MinimumDistance({0})", pv.Value));
break;
case "text-avoid-edges":
symText.LabelBehaviour.AvoidEdges = Convert.ToBoolean(pv.Value);
break;
case "text-spacing":
lpi.Properties.Add(new KeyValuePair<string, string>(pv.Name, pv.Value));
break;
case "text-max-char-angle-delta":
lpi.Properties.Add(new KeyValuePair<string, string>(pv.Name, pv.Value));
break;
case "text-label-position-tolerance":
lpi.Properties.Add(new KeyValuePair<string, string>(pv.Name, pv.Value));
break;
case "text-min-padding":
UnsupportedProperty(pv);
break;
case "text-min-path-length":
lpi.Properties.Add(new KeyValuePair<string, string>(pv.Name, pv.Value));
break;
case "text-orientation":
lpi.Properties.Add(new KeyValuePair<string, string>(pv.Name, pv.Value));
break;
case "text-placement":
lpi.Placement = pv.Value;
if (lpi.Placement == "line")
geomTrans.OffsetCurve = true;
break;
case "text-placement-type":
lpi.Properties.Add(new KeyValuePair<string, string>(pv.Name, pv.Value));
break;
case "text-placements":
lpi.Properties.Add(new KeyValuePair<string, string>(pv.Name, pv.Value));
break;
case "text-dx":
geomTrans.DisplacementX = pv.Value;
lpi.Properties.Add(new KeyValuePair<string, string>(pv.Name, pv.Value));
break;
case "text-dy":
geomTrans.DisplacementY = pv.Value;
lpi.Properties.Add(new KeyValuePair<string, string>(pv.Name, pv.Value));
break;
case "text-comp-op":
UnsupportedProperty(pv);
break;
default:
break;
}
}
}
catch (Exception ex)
{
ThrowParsingException(ex, pv);
}
ApplyTextBlockFormat(symText.TextLayout);
symText.LabelPlacement = CreateLabelPlacement(lpi);
if ("point".Equals(lpi.Placement))
geomTrans.DisplacementX = geomTrans.DisplacementY = string.Empty;
symText.GeometryExpression = ToGeometryExpression(geomTrans);
return symText;
}
public void ExerciseWmcFromCodeTest()
{
ViewContext context = new ViewContext();
// Context -> General
context.General.Window.Width = 500;
context.General.Window.Height = 300;
context.General.BoundingBox.SRS = "EPSG:4326";
context.General.BoundingBox.MinX = -180;
context.General.BoundingBox.MinY = -90;
context.General.BoundingBox.MaxX = 180;
context.General.BoundingBox.MaxY = 90;
context.General.Title = "EOS Data Gateways";
context.General.KeywordList.Add("EOS");
context.General.KeywordList.Add("EOSDIS");
context.General.KeywordList.Add("NASA");
context.General.KeywordList.Add("CCRS");
context.General.KeywordList.Add("CEOS");
context.General.KeywordList.Add("OGC");
context.General.Abstract = "Map View of EOSDIS partners locations";
context.General.LogoURL.Width = 130;
context.General.LogoURL.Height = 74;
context.General.LogoURL.Format = "image/gif";
context.General.LogoURL.OnlineResource.Type = "simple";
context.General.LogoURL.OnlineResource.Href = "http://redhook.gsfc.nasa.gov/~imswww/pub/icons/logo.gif";
context.General.DescriptionURL.Format = "text/html";
context.General.DescriptionURL.OnlineResource.Type = "simple";
context.General.DescriptionURL.OnlineResource.Href = "http://eos.nasa.gov/imswelcome";
context.General.ContactInformation.ContactPersonPrimary.ContactPerson = "Tom Kralidis";
context.General.ContactInformation.ContactPersonPrimary.ContactOrganisation = "Canada Centre for Remote Sensing";
context.General.ContactInformation.ContactPosition = "Systems Scientist";
context.General.ContactInformation.ContactAddress.AddressType = "postal";
context.General.ContactInformation.ContactAddress.Address = "615 Booth Street, room 650";
context.General.ContactInformation.ContactAddress.City = "Ottawa";
context.General.ContactInformation.ContactAddress.StateOrProvince = "Ontario";
context.General.ContactInformation.ContactAddress.Country = "Canada";
context.General.ContactInformation.ContactVoiceTelephone = "+01 613 947 1828";
context.General.ContactInformation.ContactFacsimileTelephone = "+01 613 947 2410";
context.General.ContactInformation.ContactElectronicMailAddress = "*****@*****.**";
context.Version = "1.0";
context.Id = "TEST";
// Context -> Layer
Layer layer = new Layer();
layer.Queryable = 1;
layer.Hidden = 0;
layer.Server.Service = GeospatialServices.Ogc.Common.ServiceNames.WMS;
layer.Server.Version = "1.0.7";
layer.Title = "The GLOBE Program Visualization Server";
layer.Server.OnlineResource.Type = "simple";
layer.Server.OnlineResource.Href = "http://globe.digitalearth.gov/viz-bin/wmt.cgi";
layer.Name = "NATIONAL";
layer.Title = "National Boundaries";
layer.Abstract = "Context layer: National Boundaries";
layer.SRS = "EPSG:4326";
// Context -> Layer -> Format
layer.FormatList.Add(new Format("GIF", 1));
// Context -> Layer -> Style
Style style1 = new Style();
style1.Current = 1;
style1.Name = "default";
style1.LegendURL.Width = 16;
style1.LegendURL.Height = 16;
style1.LegendURL.Format = "image/gif";
style1.LegendURL.OnlineResource.Type = "simple";
style1.LegendURL.OnlineResource.Href = "http://mapserv2.esrin.esa.it/cubestor/cubeserv.cgi?VERSION=1.1.0&REQUEST=GetLegendIcon&LAYER=WORLD_MODIS_1KM:MapAdmin&SPATIAL_TYPE=RASTER&STYLE=default&FORMAT=image//gif";
// Context -> Layer -> Style -> Named Layer
NamedLayer namedLayer = new NamedLayer();
namedLayer.Name = "Roads";
// Context -> Layer -> Style -> Named Layer -> Named Styles
namedLayer.NamedStyles.Add(new NamedStyle("Casing"));
namedLayer.NamedStyles.Add(new NamedStyle("Centerline"));
// Context -> Layer -> Style -> Named Layer -> User Style
UserStyle userStyle1 = new UserStyle();
// Context -> Layer -> Style -> Named Layer -> User Style -> FeatureTypeStyle
FeatureTypeStyle featureTypeStyle1 = new FeatureTypeStyle();
Rule rule1 = new Rule();
// Context -> Layer -> Style -> Named Layer -> User Style -> FeatureTypeStyle -> Rule -> Symbolizers
BaseSymbolizer[] symbolizers = new BaseSymbolizer[6];
SymbolizerTypes[] symbolizerSelections = new SymbolizerTypes[6];
// Line Symbolizer
LineSymbolizer lineSymbolizer = new LineSymbolizer();
lineSymbolizer.Geometry.PropertyName = "center-line";
lineSymbolizer.Stroke.SvgParameters.Add(new SvgParameter("stroke", "#0000ff"));
lineSymbolizer.Stroke.SvgParameters.Add(new SvgParameter("stroke-width", "2"));
symbolizers[0] = lineSymbolizer;
symbolizerSelections[0] = SymbolizerTypes.LineSymbolizer;
// Polygon Symbolizer
PolygonSymbolizer polygonSymbolizer = new PolygonSymbolizer();
polygonSymbolizer.Geometry.PropertyName = "the_area";
polygonSymbolizer.Fill.SvgParameters.Add(new SvgParameter("fill", "#aaaaff"));
polygonSymbolizer.Stroke.SvgParameters.Add(new SvgParameter("stroke", "#0000aa"));
symbolizers[1] = polygonSymbolizer;
symbolizerSelections[1] = SymbolizerTypes.PolygonSymbolizer;
// Point Symbolizer
PointSymbolizer pointSymbolizer = new PointSymbolizer();
// Point Symbolizer - > External Graphic 1
ExternalGraphic externalGraphic1 = new ExternalGraphic();
externalGraphic1.OnlineResource.Type = "simple";
externalGraphic1.OnlineResource.Href = "http://www.vendor.com/geosym/2267.svg";
externalGraphic1.Format = "image/svg+xml";
pointSymbolizer.Graphic.ExternalGraphics.Add(externalGraphic1);
// Point Symbolizer - > External Graphic 2
ExternalGraphic externalGraphic2 = new ExternalGraphic();
externalGraphic2.OnlineResource.Type = "simple";
externalGraphic2.OnlineResource.Href = "http://www.vendor.com/geosym/2267.png";
externalGraphic2.Format = "image/png";
pointSymbolizer.Graphic.ExternalGraphics.Add(externalGraphic2);
pointSymbolizer.Graphic.Size = 15.0;
symbolizers[2] = pointSymbolizer;
symbolizerSelections[2] = SymbolizerTypes.PointSymbolizer;
// Text Symbolizer
TextSymbolizer textSymbolizer = new TextSymbolizer();
textSymbolizer.Geometry.PropertyName = "locatedAt";
textSymbolizer.Label = @"ogc:PropertyName[hospitalName]";
textSymbolizer.Font.SvgParameters.Add(new SvgParameter("font-family", "Arial"));
textSymbolizer.Font.SvgParameters.Add(new SvgParameter("font-family", "Sans-Serif"));
textSymbolizer.Font.SvgParameters.Add(new SvgParameter("font-style", "italic"));
textSymbolizer.Font.SvgParameters.Add(new SvgParameter("font-size", "10"));
textSymbolizer.Fill.SvgParameters.Add(new SvgParameter("fill", "#000000"));
textSymbolizer.LabelPlacement.PointPlacement = new PointPlacement();
textSymbolizer.LabelPlacement.PointPlacement.AnchorPoint.AnchorPointX = 456;
textSymbolizer.LabelPlacement.PointPlacement.AnchorPoint.AnchorPointY = 123;
textSymbolizer.LabelPlacement.PointPlacement.Rotation = 180;
textSymbolizer.LabelPlacement.PointPlacement.Displacement.DisplacementX = 111;
textSymbolizer.LabelPlacement.PointPlacement.Displacement.DisplacementY = 222;
textSymbolizer.LabelPlacement.LinePlacement = new LinePlacement();
textSymbolizer.LabelPlacement.LinePlacement.Gap = 12;
textSymbolizer.LabelPlacement.LinePlacement.GeneraliseLine = 3;
textSymbolizer.LabelPlacement.LinePlacement.InitialGap = 3;
textSymbolizer.LabelPlacement.LinePlacement.IsAligned = 0;
textSymbolizer.LabelPlacement.LinePlacement.IsRepeated = 1;
textSymbolizer.LabelPlacement.LinePlacement.PerpendicularOffset = 5;
textSymbolizer.Halo.Fill = new Fill();
textSymbolizer.Halo.Fill.SvgParameters.Add(new SvgParameter("fill", "#000000"));
textSymbolizer.Halo.Radius = 3;
symbolizers[3] = textSymbolizer;
symbolizerSelections[3] = SymbolizerTypes.TextSymbolizer;
// Raster Symbolizer 1
RasterSymbolizer rasterSymbolizer1 = new RasterSymbolizer();
rasterSymbolizer1.Opacity = 1.0;
rasterSymbolizer1.OverlapBehaviour = OverlapBehaviourTypes.Average;
rasterSymbolizer1.ColourMap.Categorize.LookupValue = "Rasterdata";
rasterSymbolizer1.ColourMap.Categorize.Values.Add("#00ff00");
rasterSymbolizer1.ColourMap.Categorize.Thresholds.Add(-417);
rasterSymbolizer1.ColourMap.Categorize.Values.Add("#00fa00");
rasterSymbolizer1.ColourMap.Categorize.Thresholds.Add(-333);
symbolizers[4] = rasterSymbolizer1;
symbolizerSelections[4] = SymbolizerTypes.RasterSymbolizer;
// Raster Symbolizer 2
RasterSymbolizer rasterSymbolizer2 = new RasterSymbolizer();
rasterSymbolizer2.Opacity = 1.0;
rasterSymbolizer2.OverlapBehaviour = OverlapBehaviourTypes.LatestOnTop;
rasterSymbolizer2.ChannelSelection.RedChannel.SourceChannelName = "1";
rasterSymbolizer2.ChannelSelection.GreenChannel.SourceChannelName = "2";
rasterSymbolizer2.ChannelSelection.GreenChannel.ContrastEnhancement.GammaValue = 2.5;
rasterSymbolizer2.ChannelSelection.BlueChannel.SourceChannelName = "3";
rasterSymbolizer2.ColourMap.Interpolate.FallBackValue = "#dddddd";
rasterSymbolizer2.ColourMap.Interpolate.LookupValue = "Rasterdata";
rasterSymbolizer2.ColourMap.Interpolate.InterpolationPoints.Add(new InterpolationPoint(0, "#000000"));
rasterSymbolizer2.ColourMap.Interpolate.InterpolationPoints.Add(new InterpolationPoint(255, "#ffffff"));
rasterSymbolizer2.ContrastEnhancement.GammaValue = 1;
rasterSymbolizer2.Geometry.PropertyName = "Coastlines";
symbolizers[5] = rasterSymbolizer2;
symbolizerSelections[5] = SymbolizerTypes.RasterSymbolizer;
rule1.SymbolizerSelections = symbolizerSelections;
rule1.Symbolizers = symbolizers;
featureTypeStyle1.Rules.Add(rule1);
Rule rule2 = new Rule();
rule2.ElseFilter = new ElseFilter();
featureTypeStyle1.Rules.Add(rule2);
Rule rule3 = new Rule();
GeospatialServices.Ogc.Wmc.PropertyIsEqualTo propEqualTo = new PropertyIsEqualTo();
propEqualTo.Literal.Value = "NEW YORK";
propEqualTo.PropertyName = "SALES_AREA";
//BaseComparisonOps ComparisonOps[] = new BaseComparisonOps[2];
rule3.Filter.FilterExpression = propEqualTo;
featureTypeStyle1.Rules.Add(rule3);
userStyle1.FeatureTypeStyles.Add(featureTypeStyle1);
namedLayer.UserStyles.Add(userStyle1);
// Context - > Layer -> Style -> User Layer
UserLayer userLayer = new UserLayer();
userLayer.Name = "Lakes and Rivers";
UserStyle userStyle = new UserStyle("Default");
userStyle.FeatureTypeStyles.Add(featureTypeStyle1);
userLayer.UserStyles = new List <UserStyle>();
userLayer.UserStyles.Add(userStyle);
style1.SLD.StyledLayerDescriptor.NamedLayers.Add(namedLayer);
style1.SLD.StyledLayerDescriptor.UserLayers.Add(userLayer);
layer.StyleList.Add(style1);
context.Layers.Add(layer);
}
private void RenderLineLabel(TextSymbolizer textSymbolizer, Feature feature)
{
//TODO labels could be not strings
var str = feature.Attributes.Exists(textSymbolizer.LabelAttribute) ? feature.Attributes[textSymbolizer.LabelAttribute] as string : null;
if (string.IsNullOrWhiteSpace(str))
{
return;
}
var emSize = Graphics.DpiY * textSymbolizer.FontSize / 72;
//ref http://msdn.microsoft.com/en-us/library/xwf9s90b(v=vs.110).aspx
var font = FontCache[textSymbolizer];
var ascent = emSize * font.FontFamily.GetCellAscent(FontStyle.Bold) / font.FontFamily.GetEmHeight(FontStyle.Bold);
Graphics.SmoothingMode = SmoothingMode.HighQuality;
var size = Graphics.MeasureString(str, font);
float spacing = textSymbolizer.Spacing;
var coords = ProjectToCoordinate(feature.Geometry.Coordinates);
var coordsAsLine = new LineString(coords);
var lengthIndexed = new NetTopologySuite.LinearReferencing.LengthIndexedLine(coordsAsLine);
var labelCount = (int)((coordsAsLine.Length - spacing) / (size.Width + spacing));
if (labelCount < 1 || textSymbolizer.Spacing == 0)
{
labelCount = 1;
}
//work out spacing based on the amount of labels we'll be putting on
spacing = ((float)coordsAsLine.Length / labelCount) - size.Width;
for (var i = 0; i < labelCount; i++)
{
var labelCenterLength = (spacing + size.Width) * (0.5f + i);
var subLine = lengthIndexed.ExtractLine(labelCenterLength - (size.Width / 2), labelCenterLength + (size.Width / 2));
if (subLine.Coordinates.Length < 2)
{
continue;
}
var firstCoord = subLine.Coordinates[0];
var lastCoord = subLine.Coordinates[subLine.Coordinates.Length - 1];
var middleOfLabelLinePoint = lengthIndexed.ExtractPoint(labelCenterLength);
var midPoint = new PointF((float)(firstCoord.X + lastCoord.X + middleOfLabelLinePoint.X + middleOfLabelLinePoint.X) * 0.25f, (float)(firstCoord.Y + lastCoord.Y + middleOfLabelLinePoint.Y + middleOfLabelLinePoint.Y) * 0.25f);
var angle = (float)(Math.Atan2(lastCoord.Y - firstCoord.Y, lastCoord.X - firstCoord.X) * 180 / Math.PI);
//Keep the text up the right way
while (angle + Config.Angle > 90)
{
angle -= 180;
}
while (angle + Config.Angle < -90)
{
angle += 180;
}
TryRenderText(textSymbolizer, feature, emSize, str, midPoint, SizeF.Empty, new SizeF(size.Width, ascent), angle);
}
}
