protected override void OnRender(DrawingContext drawingContext) { var projection = ParentMap?.MapProjection; if (projection != null && !double.IsNaN(projection.LongitudeScale)) { var bounds = projection.ViewportRectToBoundingBox(new Rect(ParentMap.RenderSize)); var lineDistance = GetLineDistance(); var labelFormat = GetLabelFormat(lineDistance); var latLabelStart = Math.Ceiling(bounds.South / lineDistance) * lineDistance; var lonLabelStart = Math.Ceiling(bounds.West / lineDistance) * lineDistance; var latLabels = new List <Label>((int)((bounds.North - latLabelStart) / lineDistance) + 1); var lonLabels = new List <Label>((int)((bounds.East - lonLabelStart) / lineDistance) + 1); var typeface = new Typeface(FontFamily, FontStyle, FontWeight, FontStretch); var pen = new Pen { Brush = Stroke, Thickness = StrokeThickness, DashStyle = new DashStyle(StrokeDashArray, StrokeDashOffset), DashCap = StrokeDashCap }; for (var lat = latLabelStart; lat <= bounds.North; lat += lineDistance) { latLabels.Add(new Label(lat, new FormattedText( GetLabelText(lat, labelFormat, "NS"), CultureInfo.InvariantCulture, FlowDirection.LeftToRight, typeface, FontSize, Foreground))); drawingContext.DrawLine(pen, projection.LocationToViewportPoint(new Location(lat, bounds.West)), projection.LocationToViewportPoint(new Location(lat, bounds.East))); } for (var lon = lonLabelStart; lon <= bounds.East; lon += lineDistance) { lonLabels.Add(new Label(lon, new FormattedText( GetLabelText(Location.NormalizeLongitude(lon), labelFormat, "EW"), CultureInfo.InvariantCulture, FlowDirection.LeftToRight, typeface, FontSize, Foreground))); drawingContext.DrawLine(pen, projection.LocationToViewportPoint(new Location(bounds.South, lon)), projection.LocationToViewportPoint(new Location(bounds.North, lon))); } foreach (var latLabel in latLabels) { foreach (var lonLabel in lonLabels) { var position = projection.LocationToViewportPoint(new Location(latLabel.Position, lonLabel.Position)); drawingContext.PushTransform(new RotateTransform(ParentMap.Heading, position.X, position.Y)); drawingContext.DrawText(latLabel.Text, new Point(position.X + StrokeThickness / 2d + 2d, position.Y - StrokeThickness / 2d - latLabel.Text.Height)); drawingContext.DrawText(lonLabel.Text, new Point(position.X + StrokeThickness / 2d + 2d, position.Y + StrokeThickness / 2d)); drawingContext.Pop(); } } } }
protected override void OnRender(DrawingContext drawingContext) { if (ParentMap != null) { var bounds = ParentMap.ViewportTransform.Inverse.TransformBounds(new Rect(ParentMap.RenderSize)); var start = ParentMap.MapTransform.Transform(new Point(bounds.X, bounds.Y)); var end = ParentMap.MapTransform.Transform(new Point(bounds.X + bounds.Width, bounds.Y + bounds.Height)); var minSpacing = MinLineSpacing * 360d / (Math.Pow(2d, ParentMap.ZoomLevel) * TileSource.TileSize); var spacing = LineSpacings[LineSpacings.Length - 1]; if (spacing >= minSpacing) { spacing = LineSpacings.FirstOrDefault(s => s >= minSpacing); } var latLabelStart = Math.Ceiling(start.Latitude / spacing) * spacing; var lonLabelStart = Math.Ceiling(start.Longitude / spacing) * spacing; var latLabels = new List <Label>((int)((end.Latitude - latLabelStart) / spacing) + 1); var lonLabels = new List <Label>((int)((end.Longitude - lonLabelStart) / spacing) + 1); var labelFormat = spacing < 1d ? "{0} {1}°{2:00}'" : "{0} {1}°"; for (var lat = latLabelStart; lat <= end.Latitude; lat += spacing) { latLabels.Add(new Label(lat, new FormattedText( CoordinateString(lat, labelFormat, "NS"), CultureInfo.InvariantCulture, FlowDirection.LeftToRight, Typeface, FontSize, Foreground))); drawingContext.DrawLine(Pen, ParentMap.LocationToViewportPoint(new Location(lat, start.Longitude)), ParentMap.LocationToViewportPoint(new Location(lat, end.Longitude))); } for (var lon = lonLabelStart; lon <= end.Longitude; lon += spacing) { lonLabels.Add(new Label(lon, new FormattedText( CoordinateString(Location.NormalizeLongitude(lon), labelFormat, "EW"), CultureInfo.InvariantCulture, FlowDirection.LeftToRight, Typeface, FontSize, Foreground))); drawingContext.DrawLine(Pen, ParentMap.LocationToViewportPoint(new Location(start.Latitude, lon)), ParentMap.LocationToViewportPoint(new Location(end.Latitude, lon))); } foreach (var latLabel in latLabels) { foreach (var lonLabel in lonLabels) { var position = ParentMap.LocationToViewportPoint(new Location(latLabel.Position, lonLabel.Position)); drawingContext.PushTransform(new RotateTransform(ParentMap.Heading, position.X, position.Y)); drawingContext.DrawText(latLabel.Text, new Point(position.X + StrokeThickness / 2d + 2d, position.Y - StrokeThickness / 2d - latLabel.Text.Height)); drawingContext.DrawText(lonLabel.Text, new Point(position.X + StrokeThickness / 2d + 2d, position.Y + StrokeThickness / 2d)); drawingContext.Pop(); } } } }
protected override void OnRender(DrawingContext drawingContext) { if (ParentMap != null) { //ERROR HERE var bounds = ParentMap.ViewportTransform.Inverse.TransformBounds(new Rect(ParentMap.RenderSize)); var start = ParentMap.MapTransform.Transform(new Point(bounds.X, bounds.Y)); var end = ParentMap.MapTransform.Transform(new Point(bounds.X + bounds.Width, bounds.Y + bounds.Height)); var lineDistance = GetLineDistance(); var labelFormat = GetLabelFormat(lineDistance); var latLabelStart = Math.Ceiling(start.Latitude / lineDistance) * lineDistance; var lonLabelStart = Math.Ceiling(start.Longitude / lineDistance) * lineDistance; //ERROR HERE if (Double.IsNaN(end.Latitude) || Double.IsNaN(end.Longitude)) { return; } var latLabels = new List <Label>((int)((end.Latitude - latLabelStart) / lineDistance) + 1); var lonLabels = new List <Label>((int)((end.Longitude - lonLabelStart) / lineDistance) + 1); for (var lat = latLabelStart; lat <= end.Latitude; lat += lineDistance) { latLabels.Add(new Label(lat, new FormattedText( GetLabelText(lat, labelFormat, "NS"), CultureInfo.InvariantCulture, FlowDirection.LeftToRight, Typeface, FontSize, Foreground))); drawingContext.DrawLine(Pen, ParentMap.LocationToViewportPoint(new Location(lat, start.Longitude)), ParentMap.LocationToViewportPoint(new Location(lat, end.Longitude))); } for (var lon = lonLabelStart; lon <= end.Longitude; lon += lineDistance) { lonLabels.Add(new Label(lon, new FormattedText( GetLabelText(Location.NormalizeLongitude(lon), labelFormat, "EW"), CultureInfo.InvariantCulture, FlowDirection.LeftToRight, Typeface, FontSize, Foreground))); drawingContext.DrawLine(Pen, ParentMap.LocationToViewportPoint(new Location(start.Latitude, lon)), ParentMap.LocationToViewportPoint(new Location(end.Latitude, lon))); } foreach (var latLabel in latLabels) { foreach (var lonLabel in lonLabels) { var position = ParentMap.LocationToViewportPoint(new Location(latLabel.Position, lonLabel.Position)); drawingContext.PushTransform(new RotateTransform(ParentMap.Heading, position.X, position.Y)); drawingContext.DrawText(latLabel.Text, new Point(position.X + StrokeThickness / 2d + 2d, position.Y - StrokeThickness / 2d - latLabel.Text.Height)); drawingContext.DrawText(lonLabel.Text, new Point(position.X + StrokeThickness / 2d + 2d, position.Y + StrokeThickness / 2d)); drawingContext.Pop(); } } } }
private void CenterPointPropertyChanged(Point centerPoint) { if (!internalPropertyChange) { centerPoint.X = Location.NormalizeLongitude(centerPoint.X); InternalSetValue(CenterProperty, mapTransform.Transform(centerPoint)); UpdateTransform(); } }
private void CenterPointPropertyChanged(Point centerPoint) { if (!internalPropertyChange) { var center = MapProjection.PointToLocation(centerPoint); center.Longitude = Location.NormalizeLongitude(center.Longitude); InternalSetValue(CenterProperty, center); UpdateTransform(); } }
private void DrawCylindricalGraticule(DrawingContext drawingContext, MapProjection projection, double lineDistance, string labelFormat) { var boundingBox = projection.ViewportRectToBoundingBox(new Rect(ParentMap.RenderSize)); if (boundingBox.HasValidBounds) { var latLabelStart = Math.Ceiling(boundingBox.South / lineDistance) * lineDistance; var lonLabelStart = Math.Ceiling(boundingBox.West / lineDistance) * lineDistance; var latLabels = new List <Label>((int)((boundingBox.North - latLabelStart) / lineDistance) + 1); var lonLabels = new List <Label>((int)((boundingBox.East - lonLabelStart) / lineDistance) + 1); var typeface = new Typeface(FontFamily, FontStyle, FontWeight, FontStretch); var pixelsPerDpi = VisualTreeHelper.GetDpi(this).PixelsPerDip; var pen = CreatePen(); for (var lat = latLabelStart; lat <= boundingBox.North; lat += lineDistance) { latLabels.Add(new Label(lat, new FormattedText( GetLabelText(lat, labelFormat, "NS"), CultureInfo.InvariantCulture, FlowDirection.LeftToRight, typeface, FontSize, Foreground, pixelsPerDpi))); drawingContext.DrawLine(pen, projection.LocationToViewportPoint(new Location(lat, boundingBox.West)), projection.LocationToViewportPoint(new Location(lat, boundingBox.East))); } for (var lon = lonLabelStart; lon <= boundingBox.East; lon += lineDistance) { lonLabels.Add(new Label(lon, new FormattedText( GetLabelText(Location.NormalizeLongitude(lon), labelFormat, "EW"), CultureInfo.InvariantCulture, FlowDirection.LeftToRight, typeface, FontSize, Foreground, pixelsPerDpi))); drawingContext.DrawLine(pen, projection.LocationToViewportPoint(new Location(boundingBox.South, lon)), projection.LocationToViewportPoint(new Location(boundingBox.North, lon))); } foreach (var latLabel in latLabels) { foreach (var lonLabel in lonLabels) { var position = projection.LocationToViewportPoint(new Location(latLabel.Position, lonLabel.Position)); drawingContext.PushTransform(new RotateTransform(ParentMap.Heading, position.X, position.Y)); drawingContext.DrawText(latLabel.Text, new Point(position.X + StrokeThickness / 2d + 2d, position.Y - StrokeThickness / 2d - latLabel.Text.Height)); drawingContext.DrawText(lonLabel.Text, new Point(position.X + StrokeThickness / 2d + 2d, position.Y + StrokeThickness / 2d)); drawingContext.Pop(); } } } }
private void AdjustCenterProperty(DependencyProperty property, ref Location center) { if (center == null || center.Longitude < -180d || center.Longitude > 180d || center.Latitude < -MapProjection.MaxLatitude || center.Latitude > MapProjection.MaxLatitude) { center = (center == null) ? new Location() : new Location( Math.Min(Math.Max(center.Latitude, -MapProjection.MaxLatitude), MapProjection.MaxLatitude), Location.NormalizeLongitude(center.Longitude)); SetValueInternal(property, center); } }
private void UpdateTransform(bool resetTransformCenter = false, bool projectionChanged = false) { var projection = MapProjection; projection.Center = ProjectionCenter ?? Center; var center = transformCenter ?? Center; var mapCenter = projection.LocationToMap(center); var viewScale = ViewTransform.ZoomLevelToScale(ZoomLevel); ViewTransform.SetTransform(mapCenter, viewCenter, viewScale, Heading); if (transformCenter != null) { center = ViewToLocation(new Point(RenderSize.Width / 2d, RenderSize.Height / 2d)); center.Longitude = Location.NormalizeLongitude(center.Longitude); if (center.Latitude < -projection.MaxLatitude || center.Latitude > projection.MaxLatitude) { center.Latitude = Math.Min(Math.Max(center.Latitude, -projection.MaxLatitude), projection.MaxLatitude); resetTransformCenter = true; } SetValueInternal(CenterProperty, center); if (centerAnimation == null) { SetValueInternal(TargetCenterProperty, center); } if (resetTransformCenter) { ResetTransformCenter(); projection.Center = ProjectionCenter ?? center; mapCenter = projection.LocationToMap(center); ViewTransform.SetTransform(mapCenter, viewCenter, viewScale, Heading); } } ViewScale = ViewTransform.Scale; OnViewportChanged(new ViewportChangedEventArgs(projectionChanged, Center.Longitude - centerLongitude)); centerLongitude = Center.Longitude; }
private void AdjustCenterProperty(DependencyProperty property, ref Location center) { if (center == null) { center = new Location(); InternalSetValue(property, center); } else if (center.Longitude < -180d || center.Longitude > 180d || center.Latitude < -mapTransform.MaxLatitude || center.Latitude > mapTransform.MaxLatitude) { center = new Location( Math.Min(Math.Max(center.Latitude, -mapTransform.MaxLatitude), mapTransform.MaxLatitude), Location.NormalizeLongitude(center.Longitude)); InternalSetValue(property, center); } }
/// <summary> /// Transforms a geographic location to a cartesian coordinate point /// with minumum distance to the specified reference longitude value. /// </summary> public Point Transform(Location location, double referenceLongitude) { var p = Transform(location); p.X = Location.NormalizeLongitude(p.X); if (p.X > referenceLongitude + 180d) { p.X -= 360d; } else if (p.X < referenceLongitude - 180d) { p.X += 360d; } return(p); }
private void UpdateTransform(bool resetTransformCenter = false, bool projectionChanged = false) { var projection = MapProjection; var center = transformCenter ?? Center; projection.SetViewportTransform(ProjectionCenter ?? Center, center, viewportCenter, ZoomLevel, Heading); if (transformCenter != null) { center = projection.ViewportPointToLocation(new Point(RenderSize.Width / 2d, RenderSize.Height / 2d)); center.Longitude = Location.NormalizeLongitude(center.Longitude); if (center.Latitude < -projection.MaxLatitude || center.Latitude > projection.MaxLatitude) { center.Latitude = Math.Min(Math.Max(center.Latitude, -projection.MaxLatitude), projection.MaxLatitude); resetTransformCenter = true; } SetValueInternal(CenterProperty, center); if (centerAnimation == null) { SetValueInternal(TargetCenterProperty, center); } if (resetTransformCenter) { ResetTransformCenter(); projection.SetViewportTransform(ProjectionCenter ?? center, center, viewportCenter, ZoomLevel, Heading); } } ViewportTransform.Matrix = projection.ViewportTransform; var scale = projection.GetMapScale(center); ScaleTransform.ScaleX = scale.X; ScaleTransform.ScaleY = scale.Y; RotateTransform.Angle = Heading; OnViewportChanged(new ViewportChangedEventArgs(projectionChanged, Center.Longitude - centerLongitude)); centerLongitude = Center.Longitude; }
private void UpdateTransform(bool resetTransformOrigin = false) { Location center; if (transformOrigin == null) { center = Center; SetViewportTransform(center); } else { SetViewportTransform(transformOrigin); center = ViewportPointToLocation(new Point(RenderSize.Width / 2d, RenderSize.Height / 2d)); center.Longitude = Location.NormalizeLongitude(center.Longitude); if (center.Latitude < -mapTransform.MaxLatitude || center.Latitude > mapTransform.MaxLatitude) { center.Latitude = Math.Min(Math.Max(center.Latitude, -mapTransform.MaxLatitude), mapTransform.MaxLatitude); resetTransformOrigin = true; } InternalSetValue(CenterProperty, center); if (centerAnimation == null) { InternalSetValue(TargetCenterProperty, center); InternalSetValue(CenterPointProperty, mapTransform.Transform(center)); } if (resetTransformOrigin) { ResetTransformOrigin(); SetViewportTransform(center); } } CenterScale = ViewportScale * mapTransform.RelativeScale(center) / TileSource.MetersPerDegree; // pixels per meter at center latitude scaleTransform.ScaleX = CenterScale; scaleTransform.ScaleY = CenterScale; rotateTransform.Angle = Heading; OnViewportChanged(); }
private void UpdateTransform(bool resetTransformOrigin = false) { var center = Center; var scale = SetViewportTransform(transformOrigin ?? center); if (transformOrigin != null) { center = ViewportPointToLocation(new Point(RenderSize.Width / 2d, RenderSize.Height / 2d)); center.Longitude = Location.NormalizeLongitude(center.Longitude); if (center.Latitude < -mapTransform.MaxLatitude || center.Latitude > mapTransform.MaxLatitude) { center.Latitude = Math.Min(Math.Max(center.Latitude, -mapTransform.MaxLatitude), mapTransform.MaxLatitude); resetTransformOrigin = true; } InternalSetValue(CenterProperty, center); if (centerAnimation == null) { InternalSetValue(TargetCenterProperty, center); InternalSetValue(CenterPointProperty, MapTransform.Transform(center)); } if (resetTransformOrigin) { ResetTransformOrigin(); scale = SetViewportTransform(center); } } scale *= mapTransform.RelativeScale(center) / MetersPerDegree; // Pixels per meter at center latitude CenterScale = scale; SetTransformMatrixes(scale); OnViewportChanged(); }
protected override void OnViewportChanged(ViewportChangedEventArgs e) { if (path == null) { path = new Path { Data = new PathGeometry() }; path.SetBinding(Shape.StrokeProperty, GetBindingExpression(StrokeProperty)?.ParentBinding ?? new Binding { Source = this, Path = new PropertyPath("Stroke") }); path.SetBinding(Shape.StrokeThicknessProperty, GetBindingExpression(StrokeThicknessProperty)?.ParentBinding ?? new Binding { Source = this, Path = new PropertyPath("StrokeThickness") }); Children.Add(path); } var bounds = ParentMap.ViewportTransform.Inverse.TransformBounds(new Rect(new Point(), ParentMap.RenderSize)); var start = ParentMap.MapTransform.Transform(new Point(bounds.X, bounds.Y)); var end = ParentMap.MapTransform.Transform(new Point(bounds.X + bounds.Width, bounds.Y + bounds.Height)); var lineDistance = GetLineDistance(); var labelStart = new Location( Math.Ceiling(start.Latitude / lineDistance) * lineDistance, Math.Ceiling(start.Longitude / lineDistance) * lineDistance); var labelEnd = new Location( Math.Floor(end.Latitude / lineDistance) * lineDistance, Math.Floor(end.Longitude / lineDistance) * lineDistance); var lineStart = new Location( Math.Min(Math.Max(labelStart.Latitude - lineDistance, -ParentMap.MapTransform.MaxLatitude), ParentMap.MapTransform.MaxLatitude), labelStart.Longitude - lineDistance); var lineEnd = new Location( Math.Min(Math.Max(labelEnd.Latitude + lineDistance, -ParentMap.MapTransform.MaxLatitude), ParentMap.MapTransform.MaxLatitude), labelEnd.Longitude + lineDistance); if (!lineStart.Equals(graticuleStart) || !lineEnd.Equals(graticuleEnd)) { graticuleStart = lineStart; graticuleEnd = lineEnd; var geometry = (PathGeometry)path.Data; geometry.Figures.Clear(); geometry.Transform = ParentMap.ViewportTransform; for (var lat = labelStart.Latitude; lat <= end.Latitude; lat += lineDistance) { var figure = new PathFigure { StartPoint = ParentMap.MapTransform.Transform(new Location(lat, lineStart.Longitude)), IsClosed = false, IsFilled = false }; figure.Segments.Add(new LineSegment { Point = ParentMap.MapTransform.Transform(new Location(lat, lineEnd.Longitude)), }); geometry.Figures.Add(figure); } for (var lon = labelStart.Longitude; lon <= end.Longitude; lon += lineDistance) { var figure = new PathFigure { StartPoint = ParentMap.MapTransform.Transform(new Location(lineStart.Latitude, lon)), IsClosed = false, IsFilled = false }; figure.Segments.Add(new LineSegment { Point = ParentMap.MapTransform.Transform(new Location(lineEnd.Latitude, lon)), }); geometry.Figures.Add(figure); } var labelFormat = GetLabelFormat(lineDistance); var childIndex = 1; // 0 for Path for (var lat = labelStart.Latitude; lat <= end.Latitude; lat += lineDistance) { for (var lon = labelStart.Longitude; lon <= end.Longitude; lon += lineDistance) { TextBlock label; if (childIndex < Children.Count) { label = (TextBlock)Children[childIndex]; } else { var renderTransform = new TransformGroup(); renderTransform.Children.Add(new TranslateTransform()); renderTransform.Children.Add(ParentMap.RotateTransform); renderTransform.Children.Add(new TranslateTransform()); label = new TextBlock { RenderTransform = renderTransform }; label.SetBinding(TextBlock.ForegroundProperty, GetBindingExpression(ForegroundProperty)?.ParentBinding ?? new Binding { Source = this, Path = new PropertyPath("Foreground") }); Children.Add(label); } childIndex++; if (FontFamily != null) { label.FontFamily = FontFamily; } label.FontSize = FontSize; label.FontStyle = FontStyle; label.FontStretch = FontStretch; label.FontWeight = FontWeight; label.Text = GetLabelText(lat, labelFormat, "NS") + "\n" + GetLabelText(Location.NormalizeLongitude(lon), labelFormat, "EW"); label.Tag = new Location(lat, lon); label.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity)); var translateTransform = (TranslateTransform)((TransformGroup)label.RenderTransform).Children[0]; translateTransform.X = StrokeThickness / 2d + 2d; translateTransform.Y = -label.DesiredSize.Height / 2d; } } while (Children.Count > childIndex) { Children.RemoveAt(Children.Count - 1); } } // don't use MapPanel.Location because labels may be at more than 180° distance from map center for (int i = 1; i < Children.Count; i++) { var label = (TextBlock)Children[i]; var location = (Location)label.Tag; var viewportTransform = (TranslateTransform)((TransformGroup)label.RenderTransform).Children[2]; var viewportPosition = ParentMap.LocationToViewportPoint(location); viewportTransform.X = viewportPosition.X; viewportTransform.Y = viewportPosition.Y; } base.OnViewportChanged(e); }
protected override void OnViewportChanged() { var bounds = ParentMap.ViewportTransform.Inverse.TransformBounds(new Rect(new Point(), ParentMap.RenderSize)); var start = ParentMap.MapTransform.Transform(new Point(bounds.X, bounds.Y)); var end = ParentMap.MapTransform.Transform(new Point(bounds.X + bounds.Width, bounds.Y + bounds.Height)); var minSpacing = MinLineSpacing * 360d / (Math.Pow(2d, ParentMap.ZoomLevel) * 256d); var spacing = LineSpacings[LineSpacings.Length - 1]; if (spacing >= minSpacing) { spacing = LineSpacings.FirstOrDefault(s => s >= minSpacing); } var labelStart = new Location( Math.Ceiling(start.Latitude / spacing) * spacing, Math.Ceiling(start.Longitude / spacing) * spacing); var labelEnd = new Location( Math.Floor(end.Latitude / spacing) * spacing, Math.Floor(end.Longitude / spacing) * spacing); var lineStart = new Location( Math.Min(Math.Max(labelStart.Latitude - spacing, -ParentMap.MapTransform.MaxLatitude), ParentMap.MapTransform.MaxLatitude), labelStart.Longitude - spacing); var lineEnd = new Location( Math.Min(Math.Max(labelEnd.Latitude + spacing, -ParentMap.MapTransform.MaxLatitude), ParentMap.MapTransform.MaxLatitude), labelEnd.Longitude + spacing); if (!lineStart.Equals(graticuleStart) || !lineEnd.Equals(graticuleEnd)) { graticuleStart = lineStart; graticuleEnd = lineEnd; var geometry = (PathGeometry)path.Data; geometry.Figures.Clear(); geometry.Transform = ParentMap.ViewportTransform; for (var lat = labelStart.Latitude; lat <= end.Latitude; lat += spacing) { var figure = new PathFigure { StartPoint = ParentMap.MapTransform.Transform(new Location(lat, lineStart.Longitude)), IsClosed = false, IsFilled = false }; figure.Segments.Add(new LineSegment { Point = ParentMap.MapTransform.Transform(new Location(lat, lineEnd.Longitude)), }); geometry.Figures.Add(figure); } for (var lon = labelStart.Longitude; lon <= end.Longitude; lon += spacing) { var figure = new PathFigure { StartPoint = ParentMap.MapTransform.Transform(new Location(lineStart.Latitude, lon)), IsClosed = false, IsFilled = false }; figure.Segments.Add(new LineSegment { Point = ParentMap.MapTransform.Transform(new Location(lineEnd.Latitude, lon)), }); geometry.Figures.Add(figure); } var childIndex = 1; // 0 for Path var format = spacing < 1d ? "{0} {1}°{2:00}'" : "{0} {1}°"; for (var lat = labelStart.Latitude; lat <= end.Latitude; lat += spacing) { for (var lon = labelStart.Longitude; lon <= end.Longitude; lon += spacing) { TextBlock label; if (childIndex < Children.Count) { label = (TextBlock)Children[childIndex]; } else { var renderTransform = new TransformGroup(); renderTransform.Children.Add(new TranslateTransform()); renderTransform.Children.Add(ParentMap.RotateTransform); renderTransform.Children.Add(new TranslateTransform()); label = new TextBlock { RenderTransform = renderTransform }; label.SetBinding(TextBlock.ForegroundProperty, new Binding { Source = this, Path = new PropertyPath("Foreground") }); Children.Add(label); } childIndex++; if (FontFamily != null) { label.FontFamily = FontFamily; } label.FontSize = FontSize; label.FontStyle = FontStyle; label.FontStretch = FontStretch; label.FontWeight = FontWeight; label.Text = string.Format("{0}\n{1}", CoordinateString(lat, format, "NS"), CoordinateString(Location.NormalizeLongitude(lon), format, "EW")); label.Tag = new Location(lat, lon); label.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity)); var translateTransform = (TranslateTransform)((TransformGroup)label.RenderTransform).Children[0]; translateTransform.X = StrokeThickness / 2d + 2d; translateTransform.Y = -label.DesiredSize.Height / 2d; } } while (Children.Count > childIndex) { Children.RemoveAt(Children.Count - 1); } } // don't use MapPanel.Location because labels may be at more than 180° distance from map center for (int i = 1; i < Children.Count; i++) { var label = (TextBlock)Children[i]; var location = (Location)label.Tag; var viewportTransform = (TranslateTransform)((TransformGroup)label.RenderTransform).Children[2]; var viewportPosition = ParentMap.LocationToViewportPoint(location); viewportTransform.X = viewportPosition.X; viewportTransform.Y = viewportPosition.Y; } base.OnViewportChanged(); }
protected override void OnViewportChanged(ViewportChangedEventArgs e) { var projection = ParentMap.MapProjection; if (!projection.IsAzimuthal) { if (path == null) { path = new Path { Data = new PathGeometry() }; path.SetBinding(Shape.StrokeProperty, GetBinding(StrokeProperty, nameof(Stroke))); path.SetBinding(Shape.StrokeThicknessProperty, GetBinding(StrokeThicknessProperty, nameof(StrokeThickness))); path.SetBinding(Shape.StrokeDashArrayProperty, GetBinding(StrokeDashArrayProperty, nameof(StrokeDashArray))); path.SetBinding(Shape.StrokeDashOffsetProperty, GetBinding(StrokeDashOffsetProperty, nameof(StrokeDashOffset))); path.SetBinding(Shape.StrokeDashCapProperty, GetBinding(StrokeDashCapProperty, nameof(StrokeDashCap))); Children.Add(path); } var bounds = projection.ViewportRectToBoundingBox(new Rect(0d, 0d, ParentMap.RenderSize.Width, ParentMap.RenderSize.Height)); var lineDistance = GetLineDistance(); var labelStart = new Location( Math.Ceiling(bounds.South / lineDistance) * lineDistance, Math.Ceiling(bounds.West / lineDistance) * lineDistance); var labelEnd = new Location( Math.Floor(bounds.North / lineDistance) * lineDistance, Math.Floor(bounds.East / lineDistance) * lineDistance); var lineStart = new Location( Math.Min(Math.Max(labelStart.Latitude - lineDistance, -projection.MaxLatitude), projection.MaxLatitude), labelStart.Longitude - lineDistance); var lineEnd = new Location( Math.Min(Math.Max(labelEnd.Latitude + lineDistance, -projection.MaxLatitude), projection.MaxLatitude), labelEnd.Longitude + lineDistance); var geometry = (PathGeometry)path.Data; geometry.Figures.Clear(); for (var lat = labelStart.Latitude; lat <= bounds.North; lat += lineDistance) { var figure = new PathFigure { StartPoint = projection.LocationToViewportPoint(new Location(lat, lineStart.Longitude)), IsClosed = false, IsFilled = false }; figure.Segments.Add(new LineSegment { Point = projection.LocationToViewportPoint(new Location(lat, lineEnd.Longitude)) }); geometry.Figures.Add(figure); } for (var lon = labelStart.Longitude; lon <= bounds.East; lon += lineDistance) { var figure = new PathFigure { StartPoint = projection.LocationToViewportPoint(new Location(lineStart.Latitude, lon)), IsClosed = false, IsFilled = false }; figure.Segments.Add(new LineSegment { Point = projection.LocationToViewportPoint(new Location(lineEnd.Latitude, lon)) }); geometry.Figures.Add(figure); } var labelFormat = GetLabelFormat(lineDistance); var childIndex = 1; // 0 for Path for (var lat = labelStart.Latitude; lat <= bounds.North; lat += lineDistance) { for (var lon = labelStart.Longitude; lon <= bounds.East; lon += lineDistance) { TextBlock label; if (childIndex < Children.Count) { label = (TextBlock)Children[childIndex]; } else { var renderTransform = new TransformGroup(); renderTransform.Children.Add(new TranslateTransform()); renderTransform.Children.Add(ParentMap.RotateTransform); renderTransform.Children.Add(new TranslateTransform()); label = new TextBlock { RenderTransform = renderTransform }; if (FontFamily != null) { label.SetBinding(TextBlock.FontFamilyProperty, GetBinding(FontFamilyProperty, nameof(FontFamily))); } label.SetBinding(TextBlock.FontSizeProperty, GetBinding(FontSizeProperty, nameof(FontSize))); label.SetBinding(TextBlock.FontStyleProperty, GetBinding(FontStyleProperty, nameof(FontStyle))); label.SetBinding(TextBlock.FontStretchProperty, GetBinding(FontStretchProperty, nameof(FontStretch))); label.SetBinding(TextBlock.FontWeightProperty, GetBinding(FontWeightProperty, nameof(FontWeight))); label.SetBinding(TextBlock.ForegroundProperty, GetBinding(ForegroundProperty, nameof(Foreground))); Children.Add(label); } childIndex++; label.Text = GetLabelText(lat, labelFormat, "NS") + "\n" + GetLabelText(Location.NormalizeLongitude(lon), labelFormat, "EW"); label.Tag = new Location(lat, lon); label.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity)); var translateTransform = (TranslateTransform)((TransformGroup)label.RenderTransform).Children[0]; translateTransform.X = StrokeThickness / 2d + 2d; translateTransform.Y = -label.DesiredSize.Height / 2d; } while (Children.Count > childIndex) { Children.RemoveAt(Children.Count - 1); } } // don't use MapPanel.Location because labels may be at more than 180° distance from map center for (int i = 1; i < Children.Count; i++) { var label = (TextBlock)Children[i]; var location = (Location)label.Tag; var viewportTransform = (TranslateTransform)((TransformGroup)label.RenderTransform).Children[2]; var viewportPosition = projection.LocationToViewportPoint(location); viewportTransform.X = viewportPosition.X; viewportTransform.Y = viewportPosition.Y; } } else if (path != null) { path = null; Children.Clear(); } base.OnViewportChanged(e); }
protected override void OnRender(DrawingContext drawingContext) { if (ParentMap != null) { var bounds = ParentMap.ViewportTransform.Inverse.TransformBounds(new Rect(ParentMap.RenderSize)); var start = ParentMap.MapTransform.Transform(new Point(bounds.X, bounds.Y)); var end = ParentMap.MapTransform.Transform(new Point(bounds.X + bounds.Width, bounds.Y + bounds.Height)); var minSpacing = MinLineSpacing * 360d / (Math.Pow(2d, ParentMap.ZoomLevel) * TileSource.TileSize); var spacing = LineSpacings[LineSpacings.Length - 1]; if (spacing >= minSpacing) { spacing = LineSpacings.FirstOrDefault(s => s >= minSpacing); } var labelFormat = spacing < 1d ? "{0} {1}°{2:00}'" : "{0} {1}°"; var labelStart = new Location( Math.Ceiling(start.Latitude / spacing) * spacing, Math.Ceiling(start.Longitude / spacing) * spacing); var latLabels = new List <Label>((int)((end.Latitude - labelStart.Latitude) / spacing) + 1); var lonLabels = new List <Label>((int)((end.Longitude - labelStart.Longitude) / spacing) + 1); for (var lat = labelStart.Latitude; lat <= end.Latitude; lat += spacing) { latLabels.Add(new Label(lat, CoordinateString(lat, labelFormat, "NS"))); drawingContext.DrawLine(Pen, ParentMap.LocationToViewportPoint(new Location(lat, start.Longitude)), ParentMap.LocationToViewportPoint(new Location(lat, end.Longitude))); } for (var lon = labelStart.Longitude; lon <= end.Longitude; lon += spacing) { lonLabels.Add(new Label(lon, CoordinateString(Location.NormalizeLongitude(lon), labelFormat, "EW"))); drawingContext.DrawLine(Pen, ParentMap.LocationToViewportPoint(new Location(start.Latitude, lon)), ParentMap.LocationToViewportPoint(new Location(end.Latitude, lon))); } if (Foreground != null && Foreground != Brushes.Transparent && latLabels.Count > 0 && lonLabels.Count > 0) { var latLabelOrigin = new Point(StrokeThickness / 2d + 2d, -StrokeThickness / 2d - FontSize / 4d); var lonLabelOrigin = new Point(StrokeThickness / 2d + 2d, StrokeThickness / 2d + FontSize); var transform = Matrix.Identity; transform.Rotate(ParentMap.Heading); foreach (var latLabel in latLabels) { foreach (var lonLabel in lonLabels) { GlyphRun latGlyphRun; GlyphRun lonGlyphRun; if (!glyphRuns.TryGetValue(latLabel.Text, out latGlyphRun)) { latGlyphRun = GlyphRunText.Create(latLabel.Text, Typeface, FontSize, latLabelOrigin); glyphRuns.Add(latLabel.Text, latGlyphRun); } if (!glyphRuns.TryGetValue(lonLabel.Text, out lonGlyphRun)) { lonGlyphRun = GlyphRunText.Create(lonLabel.Text, Typeface, FontSize, lonLabelOrigin); glyphRuns.Add(lonLabel.Text, lonGlyphRun); } var position = ParentMap.LocationToViewportPoint(new Location(latLabel.Position, lonLabel.Position)); drawingContext.PushTransform(new MatrixTransform( transform.M11, transform.M12, transform.M21, transform.M22, position.X, position.Y)); drawingContext.DrawGlyphRun(Foreground, latGlyphRun); drawingContext.DrawGlyphRun(Foreground, lonGlyphRun); drawingContext.Pop(); } } var removeKeys = glyphRuns.Keys.Where(k => !latLabels.Any(l => l.Text == k) && !lonLabels.Any(l => l.Text == k)); foreach (var key in removeKeys.ToList()) { glyphRuns.Remove(key); } } else { glyphRuns.Clear(); } } }