public static Canvas RenderLabelLayer(IViewport viewport, LabelLayer layer) { var canvas = new Canvas { Opacity = layer.Opacity }; // todo: take into account the priority var features = layer.GetFeaturesInView(viewport.Extent, viewport.Resolution).ToList(); var layerStyles = BaseLayer.GetLayerStyles(layer); foreach (var layerStyle in layerStyles) { foreach (var feature in features) { var style = (layerStyle is IThemeStyle) ? (layerStyle as IThemeStyle).GetStyle(feature) : layerStyle; if ((style == null) || (style.Enabled == false) || (style.MinVisible > viewport.Resolution) || (style.MaxVisible < viewport.Resolution)) continue; if (!(style is LabelStyle)) throw new Exception("Style of label is not a LabelStyle"); var labelStyle = style as LabelStyle; labelStyle.Text = layer.GetLabelText(feature); var postion = feature.Geometry.GetBoundingBox().GetCentroid(); var labelText = labelStyle.GetLabelText(feature); canvas.Children.Add(SingleLabelRenderer.RenderLabel(postion, labelStyle, viewport, labelText)); } } return canvas; }
public static Canvas Render(IViewport viewport, LabelLayer layer) { // todo: Move stack functionality to Mapsui core. // step 1) Split RenderStackedLabelLayer into a method // GetFeaturesInViewStacked en a RenderStackedLabel // which can later be replace by normal label rendering. // The method GetFeaturesInViewStacked // returns a style with an offset determined by the stackoffset // and a position determined by CenterX en Cluster.Box.Bottom. // step 2) Move GetFeaturesInViewStacked to a GetFeaturesInView // method of a new StackedLabelLayed. var canvas = new Canvas { Opacity = layer.Opacity }; // todo: take into account the priority var features = layer.GetFeaturesInView(viewport.Extent, viewport.Resolution).ToArray(); var margin = viewport.Resolution * 50; const int symbolSize = 32; // todo: determine margin by symbol size const int boxMargin = symbolSize / 2; var clusters = new List<Cluster>(); //todo: repeat until there are no more merges ClusterFeatures(clusters, features, margin, layer.Style, viewport.Resolution); const int textHeight = 18; foreach (var cluster in clusters) { var stackOffsetY = double.NaN; var orderedFeatures = cluster.Features.OrderBy(f => f.Geometry.GetBoundingBox().GetCentroid().Y); if (cluster.Features.Count > 1) canvas.Children.Add(RenderBox(cluster.Box, viewport)); foreach (var feature in orderedFeatures) { if (double.IsNaN(stackOffsetY)) // first time stackOffsetY = textHeight * 0.5 + boxMargin; else stackOffsetY += textHeight; //todo: get size from text (or just pass stack nr) LabelStyle style; if (layer.Style is IThemeStyle) { style = (LabelStyle)((IThemeStyle)layer.Style).GetStyle(feature); } else { style = (LabelStyle)layer.Style; } var labelStyle = new LabelStyle(style) { Text = layer.GetLabelText(feature) //we only use the layer for the text, this should be returned by style }; labelStyle.Offset.Y += stackOffsetY; // since the box can be rotated, find the minimal Y value of all 4 corners var rotatedBox = cluster.Box.Rotate(-viewport.Rotation); var minY = rotatedBox.Vertices.Select(v => v.Y).Min(); var position = new Geometries.Point(cluster.Box.GetCentroid().X, minY); var labelText = labelStyle.GetLabelText(feature); canvas.Children.Add(SingleLabelRenderer.RenderLabel(position, labelStyle, viewport, labelText)); } } return canvas; }
public static List<IFeature> RenderStackedLabelLayer(IViewport viewport, LabelLayer layer) { var renderedFeatures = new List<IFeature> (); var canvas = new CALayer (); canvas.Opacity = (float)layer.Opacity; //todo: take into account the priority var features = layer.GetFeaturesInView(viewport.Extent, viewport.Resolution); var margin = viewport.Resolution * 50; if(layer.Style != null) { var clusters = new List<Cluster>(); //todo: repeat until there are no more merges ClusterFeatures(clusters, features, margin, layer.Style, viewport.Resolution); foreach (var cluster in clusters) { var feature = cluster.Features.OrderBy(f => f.Geometry.GetBoundingBox().GetCentroid().Y).FirstOrDefault(); //SetFeatureOutline (feature, layer.Name, cluster.Features.Count); //var bb = RenderBox(cluster.Box, viewport); //Zorg dat dit ALTIJD decimal zelfde ISet als ViewChanged is //var feature = cluster.Features.FirstOrDefault (); var styles = feature.Styles ?? Enumerable.Empty<IStyle>(); foreach (var style in styles) { if (feature.Styles != null && style.Enabled) { var styleKey = layer.Name; //feature.GetHashCode ().ToString (); var renderedGeometry = (feature[styleKey] != null) ? (CALayer)feature[styleKey] : null; var labelText = layer.GetLabelText(feature); if (renderedGeometry == null) { //Mapsui.Geometries.Point point, Offset stackOffset, LabelStyle style, IFeature feature, IViewport viewport, string text) renderedGeometry = RenderLabel(feature.Geometry as Mapsui.Geometries.Point, style as LabelStyle, feature, viewport, labelText); feature [styleKey] = renderedGeometry; feature ["first"] = true; } else { feature ["first"] = false; } } } renderedFeatures.Add (feature); /* Offset stackOffset = null; foreach (var feature in cluster.Features.OrderBy(f => f.Geometry.GetBoundingBox().GetCentroid().Y)) { if (layerStyle is IThemeStyle) style = (layerStyle as IThemeStyle).GetStyle(feature); if ((style == null) || (style.Enabled == false) || (style.MinVisible > viewport.Resolution) || (style.MaxVisible < viewport.Resolution)) continue; if (stackOffset == null) //first time { stackOffset = new Offset(); if (cluster.Features.Count > 1) canvas.AddSublayer (RenderBox(cluster.Box, viewport)); } else stackOffset.Y += 18; //todo: get size from text, (or just pass stack nr) if (!(style is LabelStyle)) throw new Exception("Style of label is not a LabelStyle"); var labelStyle = style as LabelStyle; string labelText = layer.GetLabel(feature); var position = new Mapsui.Geometries.Point(cluster.Box.GetCentroid().X, cluster.Box.Bottom); canvas.AddSublayer(RenderLabel(position, stackOffset, labelStyle, feature, viewport, labelText)); } */ } } return renderedFeatures; }
public static CALayer RenderLabelLayer(IViewport viewport, LabelLayer layer, List<IFeature> features) { var canvas = new CALayer(); canvas.Opacity = (float)layer.Opacity; //todo: take into account the priority var stackOffset = new Offset(); if (layer.Style != null) { var style = layer.Style; foreach (var feature in features) { if (style is IThemeStyle) style = (style as IThemeStyle).GetStyle(feature); if ((style == null) || (style.Enabled == false) || (style.MinVisible > viewport.Resolution) || (style.MaxVisible < viewport.Resolution)) continue; if (!(style is LabelStyle)) throw new Exception("Style of label is not a LabelStyle"); //var labelStyle = style as LabelStyle; string labelText = layer.GetLabelText(feature); var label = RenderLabel (feature.Geometry as Mapsui.Geometries.Point, style as LabelStyle, feature, viewport, labelText); canvas.AddSublayer(label); } } return canvas; }