private IGeometry ClipLinealGeomToViewExtents(MapViewport map, IGeometry geom) { if (map.MapTransform.IsIdentity) { var lineClipping = new CohenSutherlandLineClipping(map.Envelope.MinX, map.Envelope.MinY, map.Envelope.MaxX, map.Envelope.MaxY); if (geom is ILineString) { return(lineClipping.ClipLineString(geom as ILineString)); } if (geom is IMultiLineString) { return(lineClipping.ClipLineString(geom as IMultiLineString)); } } else { var clipPolygon = new Polygon(new LinearRing(new[] { new Coordinate(map.Center.X - map.Zoom * .5, map.Center.Y - map.MapHeight * .5), new Coordinate(map.Center.X - map.Zoom * .5, map.Center.Y + map.MapHeight * .5), new Coordinate(map.Center.X + map.Zoom * .5, map.Center.Y + map.MapHeight * .5), new Coordinate(map.Center.X + map.Zoom * .5, map.Center.Y - map.MapHeight * .5), new Coordinate(map.Center.X - map.Zoom * .5, map.Center.Y - map.MapHeight * .5) } )); var at = AffineTransformation.RotationInstance( Degrees.ToRadians(map.MapTransformRotation), map.Center.X, map.Center.Y); clipPolygon = (Polygon)at.Transform(clipPolygon); if (geom is ILineString) { return(clipPolygon.Intersection(geom as ILineString)); } if (geom is IMultiLineString) { return(clipPolygon.Intersection(geom as IMultiLineString)); } } return(null); }
/// <summary> /// Renders the layer /// </summary> /// <param name="g">Graphics object reference</param> /// <param name="map">Map which is rendered</param> public override void Render(IGraphics g, Map map) { if (Style.Enabled && Style.MaxVisible >= map.Zoom && Style.MinVisible < map.Zoom) { if (DataSource == null) { throw (new ApplicationException("DataSource property not set on layer '" + LayerName + "'")); } g.TextRenderingHint = TextRenderingHint; g.SmoothingMode = SmoothingMode; var envelope = map.Envelope; //View to render var lineClipping = new CohenSutherlandLineClipping(envelope.MinX, envelope.MinY, envelope.MaxX, envelope.MaxY); if (CoordinateTransformation != null) { #if !DotSpatialProjections if (ReverseCoordinateTransformation != null) { envelope = GeometryTransform.TransformBox(envelope, ReverseCoordinateTransformation.MathTransform); } else { CoordinateTransformation.MathTransform.Invert(); envelope = GeometryTransform.TransformBox(envelope, CoordinateTransformation.MathTransform); CoordinateTransformation.MathTransform.Invert(); } #else envelope = GeometryTransform.TransformBox(envelope, CoordinateTransformation.Target, CoordinateTransformation.Source); #endif } var ds = new FeatureCollectionSet(); DataSource.Open(); DataSource.ExecuteIntersectionQuery(envelope, ds); DataSource.Close(); if (ds.Count == 0) { base.Render(g, map); return; } var features = ds[0]; //Initialize label collection List <BaseLabel> labels = new List <BaseLabel>(); //List<System.Drawing.Rectangle> LabelBoxes; //Used for collision detection //Render labels foreach (var feature in features) { var featureGeometry = (IGeometry)feature.Geometry.Clone(); if (CoordinateTransformation != null) #if !DotSpatialProjections { featureGeometry = GeometryTransform.TransformGeometry( featureGeometry, CoordinateTransformation.MathTransform, GeometryServiceProvider.Instance.CreateGeometryFactory((int)CoordinateTransformation.TargetCS.AuthorityCode) ); } #else { featuresGeometry = GeometryTransform.TransformGeometry(features[i].Geometry, CoordinateTransformation.Source, CoordinateTransformation.Target, CoordinateTransformation.TargetFactory); } #endif LabelStyle style; if (Theme != null) //If thematics is enabled, lets override the style { style = Theme.GetStyle(feature) as LabelStyle; } else { style = Style; } float rotationStyle = style != null ? style.Rotation : 0f; float rotationColumn = 0f; if (!String.IsNullOrEmpty(RotationColumn)) { Single.TryParse(feature.Attributes[RotationColumn].ToString(), NumberStyles.Any, Map.NumberFormatEnUs, out rotationColumn); } float rotation = rotationStyle + rotationColumn; int priority = Priority; if (_getPriorityMethod != null) { priority = _getPriorityMethod(feature); } else if (!String.IsNullOrEmpty(PriorityColumn)) { Int32.TryParse(feature.Attributes[PriorityColumn].ToString(), NumberStyles.Any, Map.NumberFormatEnUs, out priority); } string text; if (_getLabelMethod != null) { text = _getLabelMethod(feature); } else { text = feature.Attributes[LabelColumn].ToString(); } if (!String.IsNullOrEmpty(text)) { // for lineal geometries, try clipping to ensure proper labeling if (featureGeometry is ILineal) { if (featureGeometry is ILineString) { featureGeometry = lineClipping.ClipLineString(featureGeometry as ILineString); } else if (featureGeometry is IMultiLineString) { featureGeometry = lineClipping.ClipLineString(featureGeometry as IMultiLineString); } } if (featureGeometry is IGeometryCollection) { if (MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.All) { foreach (var geom in (featureGeometry as IGeometryCollection)) { BaseLabel lbl = CreateLabel(feature, geom, text, rotation, priority, style, map, g, _getLocationMethod); if (lbl != null) { labels.Add(lbl); } } } else if (MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.CommonCenter) { BaseLabel lbl = CreateLabel(feature, featureGeometry, text, rotation, priority, style, map, g, _getLocationMethod); if (lbl != null) { labels.Add(lbl); } } else if (MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.First) { if ((featureGeometry as IGeometryCollection).NumGeometries > 0) { BaseLabel lbl = CreateLabel(feature, (featureGeometry as IGeometryCollection).GetGeometryN(0), text, rotation, style, map, g); if (lbl != null) { labels.Add(lbl); } } } else if (MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.Largest) { var coll = (featureGeometry as IGeometryCollection); if (coll.NumGeometries > 0) { var largestVal = 0d; var idxOfLargest = 0; for (var j = 0; j < coll.NumGeometries; j++) { var geom = coll.GetGeometryN(j); if (geom is ILineString && ((ILineString)geom).Length > largestVal) { largestVal = ((ILineString)geom).Length; idxOfLargest = j; } if (geom is IMultiLineString && ((IMultiLineString)geom).Length > largestVal) { largestVal = ((IMultiLineString)geom).Length; idxOfLargest = j; } if (geom is IPolygon && ((IPolygon)geom).Area > largestVal) { largestVal = ((IPolygon)geom).Area; idxOfLargest = j; } if (geom is IMultiPolygon && ((IMultiPolygon)geom).Area > largestVal) { largestVal = ((IMultiPolygon)geom).Area; idxOfLargest = j; } } BaseLabel lbl = CreateLabel(feature, coll.GetGeometryN(idxOfLargest), text, rotation, priority, style, map, g, _getLocationMethod); if (lbl != null) { labels.Add(lbl); } } } } else { BaseLabel lbl = CreateLabel(feature, featureGeometry, text, rotation, priority, style, map, g, _getLocationMethod); if (lbl != null) { labels.Add(lbl); } } } } if (labels.Count > 0) //We have labels to render... { if (Style.CollisionDetection && _labelFilter != null) { _labelFilter(labels); } for (int i = 0; i < labels.Count; i++) { // Don't show the label if not necessary if (!labels[i].Show) { continue; } if (labels[i] is Label) { var label = labels[i] as Label; if (label.Style.IsTextOnPath == false || label.TextOnPathLabel == null) { Renderer.Draw(map, g, label); } else { if (label.Style.BackColor != null && label.Style.BackColor != System.Drawing.Brushes.Transparent) { //draw background if (label.TextOnPathLabel.RegionList.Count > 0) { g.FillRectangles(labels[i].Style.BackColor, labels[i].TextOnPathLabel.RegionList.ToArray()); //g.FillPolygon(labels[i].Style.BackColor, labels[i].TextOnPathLabel.PointsText.ToArray()); } } label.TextOnPathLabel.DrawTextOnPath(); } } else if (labels[i] is PathLabel) { var plbl = labels[i] as PathLabel; var lblStyle = plbl.Style; g.DrawString(lblStyle.Halo, new SolidBrush(lblStyle.ForeColor), plbl.Text, lblStyle.Font.FontFamily, (int)lblStyle.Font.Style, lblStyle.Font.Size, lblStyle.GetStringFormat(), lblStyle.IgnoreLength, plbl.Location); } } } } base.Render(g, map); }
/// <summary> /// Renders the layer /// </summary> /// <param name="g">Graphics object reference</param> /// <param name="map">Map which is rendered</param> public override void Render(Graphics g, MapViewport map) { if (DataSource == null) { throw (new ApplicationException("DataSource property not set on layer '" + LayerName + "'")); } g.TextRenderingHint = TextRenderingHint; g.SmoothingMode = SmoothingMode; var mapEnvelope = map.Envelope; var layerEnvelope = ToSource(mapEnvelope); //View to render var lineClipping = new CohenSutherlandLineClipping(mapEnvelope.MinX, mapEnvelope.MinY, mapEnvelope.MaxX, mapEnvelope.MaxY); var ds = new FeatureDataSet(); DataSource.Open(); DataSource.ExecuteIntersectionQuery(layerEnvelope, ds); DataSource.Close(); if (ds.Tables.Count == 0) { base.Render(g, map); return; } var features = ds.Tables[0]; //Initialize label collection var labels = new List <BaseLabel>(); //List<System.Drawing.Rectangle> LabelBoxes; //Used for collision detection //Render labels for (int i = 0; i < features.Count; i++) { var feature = features[i]; feature.Geometry = ToTarget(feature.Geometry); LabelStyle style; if (Theme != null) //If thematics is enabled, lets override the style { style = Theme.GetStyle(feature) as LabelStyle; } else { style = Style; } // Do we need to render at all? if (!style.Enabled) { continue; } // Rotation float rotationStyle = style != null ? style.Rotation : 0f; float rotationColumn = 0f; if (!String.IsNullOrEmpty(RotationColumn)) { Single.TryParse(feature[RotationColumn].ToString(), NumberStyles.Any, Map.NumberFormatEnUs, out rotationColumn); } float rotation = rotationStyle + rotationColumn; // Priority int priority = Priority; if (_getPriorityMethod != null) { priority = _getPriorityMethod(feature); } else if (!String.IsNullOrEmpty(PriorityColumn)) { Int32.TryParse(feature[PriorityColumn].ToString(), NumberStyles.Any, Map.NumberFormatEnUs, out priority); } // Text string text; if (_getLabelMethod != null) { text = _getLabelMethod(feature); } else { text = feature[LabelColumn].ToString(); } if (!String.IsNullOrEmpty(text)) { // for lineal geometries, try clipping to ensure proper labeling if (feature.Geometry is ILineal) { if (feature.Geometry is ILineString) { feature.Geometry = lineClipping.ClipLineString(feature.Geometry as ILineString); } else if (feature.Geometry is IMultiLineString) { feature.Geometry = lineClipping.ClipLineString(feature.Geometry as IMultiLineString); } } if (feature.Geometry is IGeometryCollection) { if (MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.All) { foreach (var geom in (feature.Geometry as IGeometryCollection)) { BaseLabel lbl = CreateLabel(feature, geom, text, rotation, priority, style, map, g, _getLocationMethod); if (lbl != null) { labels.Add(lbl); } } } else if (MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.CommonCenter) { BaseLabel lbl = CreateLabel(feature, feature.Geometry, text, rotation, priority, style, map, g, _getLocationMethod); if (lbl != null) { labels.Add(lbl); } } else if (MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.First) { if ((feature.Geometry as IGeometryCollection).NumGeometries > 0) { BaseLabel lbl = CreateLabel(feature, (feature.Geometry as IGeometryCollection).GetGeometryN(0), text, rotation, style, map, g); if (lbl != null) { labels.Add(lbl); } } } else if (MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.Largest) { var coll = (feature.Geometry as IGeometryCollection); if (coll.NumGeometries > 0) { var largestVal = 0d; var idxOfLargest = 0; for (var j = 0; j < coll.NumGeometries; j++) { var geom = coll.GetGeometryN(j); if (geom is ILineString && ((ILineString)geom).Length > largestVal) { largestVal = ((ILineString)geom).Length; idxOfLargest = j; } if (geom is IMultiLineString && ((IMultiLineString)geom).Length > largestVal) { largestVal = ((IMultiLineString)geom).Length; idxOfLargest = j; } if (geom is IPolygon && ((IPolygon)geom).Area > largestVal) { largestVal = ((IPolygon)geom).Area; idxOfLargest = j; } if (geom is IMultiPolygon && ((IMultiPolygon)geom).Area > largestVal) { largestVal = ((IMultiPolygon)geom).Area; idxOfLargest = j; } } BaseLabel lbl = CreateLabel(feature, coll.GetGeometryN(idxOfLargest), text, rotation, priority, style, map, g, _getLocationMethod); if (lbl != null) { labels.Add(lbl); } } } } else { BaseLabel lbl = CreateLabel(feature, feature.Geometry, text, rotation, priority, style, map, g, _getLocationMethod); if (lbl != null) { labels.Add(lbl); } } } } if (labels.Count > 0) //We have labels to render... { if (Style.CollisionDetection && _labelFilter != null) { _labelFilter(labels); } for (int i = 0; i < labels.Count; i++) { // Don't show the label if not necessary if (!labels[i].Show) { continue; } if (labels[i] is Label) { var label = labels[i] as Label; if (label.Style.IsTextOnPath == false || label.TextOnPathLabel == null) { VectorRenderer.DrawLabel(g, label.Location, label.Style.Offset, label.Style.GetFontForGraphics(g), label.Style.ForeColor, label.Style.BackColor, label.Style.Halo, label.Rotation, label.Text, map, label.Style.HorizontalAlignment, label.LabelPoint); } else { if (label.Style.BackColor != null && label.Style.BackColor != System.Drawing.Brushes.Transparent) { //draw background if (label.TextOnPathLabel.RegionList.Count > 0) { g.FillRectangles(labels[i].Style.BackColor, labels[i].TextOnPathLabel.RegionList.ToArray()); //g.FillPolygon(labels[i].Style.BackColor, labels[i].TextOnPathLabel.PointsText.ToArray()); } } label.TextOnPathLabel.DrawTextOnPath(); } } else if (labels[i] is PathLabel) { var plbl = labels[i] as PathLabel; var lblStyle = plbl.Style; g.DrawString(lblStyle.Halo, new SolidBrush(lblStyle.ForeColor), plbl.Text, lblStyle.Font.FontFamily, (int)lblStyle.Font.Style, lblStyle.Font.Size, lblStyle.GetStringFormat(), lblStyle.IgnoreLength, plbl.Location); } } } base.Render(g, map); }
/// <summary> /// Renders the layer /// </summary> /// <param name="g">Graphics object reference</param> /// <param name="map">Map which is rendered</param> public override void Render(Graphics g, Map map) { if (Style.Enabled && Style.MaxVisible >= map.Zoom && Style.MinVisible < map.Zoom) { if (DataSource == null) { throw (new ApplicationException("DataSource property not set on layer '" + LayerName + "'")); } g.TextRenderingHint = TextRenderingHint; g.SmoothingMode = SmoothingMode; BoundingBox envelope = map.Envelope; //View to render var lineClipping = new CohenSutherlandLineClipping(envelope.Min.X, envelope.Min.Y, envelope.Max.X, envelope.Max.Y); if (CoordinateTransformation != null) { #if !DotSpatialProjections CoordinateTransformation.MathTransform.Invert(); envelope = GeometryTransform.TransformBox(envelope, CoordinateTransformation.MathTransform); CoordinateTransformation.MathTransform.Invert(); #else envelope = GeometryTransform.TransformBox(envelope, CoordinateTransformation.Target, CoordinateTransformation.Source); #endif } FeatureDataSet ds = new FeatureDataSet(); DataSource.Open(); DataSource.ExecuteIntersectionQuery(envelope, ds); DataSource.Close(); if (ds.Tables.Count == 0) { base.Render(g, map); return; } FeatureDataTable features = ds.Tables[0]; //Initialize label collection List <BaseLabel> labels = new List <BaseLabel>(); //List<System.Drawing.Rectangle> LabelBoxes; //Used for collision detection //Render labels for (int i = 0; i < features.Count; i++) { FeatureDataRow feature = features[i]; if (CoordinateTransformation != null) #if !DotSpatialProjections { features[i].Geometry = GeometryTransform.TransformGeometry(features[i].Geometry, CoordinateTransformation. MathTransform); } #else { features[i].Geometry = GeometryTransform.TransformGeometry(features[i].Geometry, CoordinateTransformation.Source, CoordinateTransformation.Target); } #endif LabelStyle style; if (Theme != null) //If thematics is enabled, lets override the style { style = Theme.GetStyle(feature) as LabelStyle; } else { style = Style; } float rotationStyle = style != null ? style.Rotation : 0f; float rotationColumn = 0f; if (!String.IsNullOrEmpty(RotationColumn)) { Single.TryParse(feature[RotationColumn].ToString(), NumberStyles.Any, Map.NumberFormatEnUs, out rotationColumn); } float rotation = rotationStyle + rotationColumn; int priority = Priority; if (_getPriorityMethod != null) { priority = _getPriorityMethod(feature); } else if (!String.IsNullOrEmpty(PriorityColumn)) { Int32.TryParse(feature[PriorityColumn].ToString(), NumberStyles.Any, Map.NumberFormatEnUs, out priority); } string text; if (_getLabelMethod != null) { text = _getLabelMethod(feature); } else { text = feature[LabelColumn].ToString(); } if (!String.IsNullOrEmpty(text)) { // for lineal geometries, try clipping to ensure proper labeling if (feature.Geometry is ILineal) { if (feature.Geometry is LineString) { feature.Geometry = lineClipping.ClipLineString(feature.Geometry as LineString); } else if (feature.Geometry is MultiLineString) { feature.Geometry = lineClipping.ClipLineString(feature.Geometry as MultiLineString); } } if (feature.Geometry is GeometryCollection) { if (MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.All) { foreach (Geometry geom in (feature.Geometry as GeometryCollection)) { BaseLabel lbl = CreateLabel(geom, text, rotation, priority, style, map, g); if (lbl != null) { labels.Add(lbl); } } } else if (MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.CommonCenter) { BaseLabel lbl = CreateLabel(feature.Geometry, text, rotation, priority, style, map, g); if (lbl != null) { labels.Add(lbl); } } else if (MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.First) { if ((feature.Geometry as GeometryCollection).Collection.Count > 0) { BaseLabel lbl = CreateLabel((feature.Geometry as GeometryCollection).Collection[0], text, rotation, style, map, g); if (lbl != null) { labels.Add(lbl); } } } else if (MultipartGeometryBehaviour == MultipartGeometryBehaviourEnum.Largest) { GeometryCollection coll = (feature.Geometry as GeometryCollection); if (coll.NumGeometries > 0) { double largestVal = 0; int idxOfLargest = 0; for (int j = 0; j < coll.NumGeometries; j++) { Geometry geom = coll.Geometry(j); if (geom is LineString && ((LineString)geom).Length > largestVal) { largestVal = ((LineString)geom).Length; idxOfLargest = j; } if (geom is MultiLineString && ((MultiLineString)geom).Length > largestVal) { largestVal = ((MultiLineString)geom).Length; idxOfLargest = j; } if (geom is Polygon && ((Polygon)geom).Area > largestVal) { largestVal = ((Polygon)geom).Area; idxOfLargest = j; } if (geom is MultiPolygon && ((MultiPolygon)geom).Area > largestVal) { largestVal = ((MultiPolygon)geom).Area; idxOfLargest = j; } } BaseLabel lbl = CreateLabel(coll.Geometry(idxOfLargest), text, rotation, priority, style, map, g); if (lbl != null) { labels.Add(lbl); } } } } else { BaseLabel lbl = CreateLabel(feature.Geometry, text, rotation, priority, style, map, g); if (lbl != null) { labels.Add(lbl); } } } } if (labels.Count > 0) //We have labels to render... { if (Style.CollisionDetection && _labelFilter != null) { _labelFilter(labels); } for (int i = 0; i < labels.Count; i++) { // Don't show the label if not necessary if (!labels[i].Show) { continue; } if (labels[i] is Label) { var label = labels[i] as Label; VectorRenderer.DrawLabel(g, label.Location, label.Style.Offset, label.Style.Font, label.Style.ForeColor, label.Style.BackColor, Style.Halo, label.Rotation, label.Text, map); } else if (labels[i] is PathLabel) { var plbl = labels[i] as PathLabel; var lblStyle = plbl.Style; g.DrawString(lblStyle.Halo, new SolidBrush(lblStyle.ForeColor), plbl.Text, lblStyle.Font.FontFamily, (int)lblStyle.Font.Style, lblStyle.Font.Size, lblStyle.GetStringFormat(), lblStyle.IgnoreLength, plbl.Location); } } } } base.Render(g, map); }