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https://github.com/ClemensFischer/XAML-Map-Control.git
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Reworked MapGraticule
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Clemens
parent
7c5eb04c9e
commit
53a291662d
3 changed files with 399 additions and 432 deletions
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@ -2,8 +2,9 @@
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// © 2022 Clemens Fischer
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// Licensed under the Microsoft Public License (Ms-PL)
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using System;
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using Windows.Foundation;
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using System.Collections.Generic;
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using System.Linq;
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#if WINUI
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using Microsoft.UI.Xaml.Controls;
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using Microsoft.UI.Xaml.Media;
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@ -18,7 +19,7 @@ namespace MapControl
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{
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public partial class MapGraticule
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{
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private Path path;
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private readonly Path path = new Path { Data = new PathGeometry() };
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public MapGraticule()
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{
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@ -27,147 +28,99 @@ namespace MapControl
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protected override void OnViewportChanged(ViewportChangedEventArgs e)
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{
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var map = ParentMap;
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var projection = map.MapProjection;
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var labels = new List<Label>();
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var pathFigures = ((PathGeometry)path.Data).Figures;
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pathFigures.Clear();
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if (projection.Type <= MapProjectionType.NormalCylindrical)
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SetLineDistance();
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if (ParentMap.MapProjection.Type <= MapProjectionType.NormalCylindrical)
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{
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if (path == null)
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{
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path = new Path { Data = new PathGeometry() };
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path.SetBinding(Shape.StrokeProperty, this.GetOrCreateBinding(StrokeProperty, nameof(Stroke)));
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path.SetBinding(Shape.StrokeThicknessProperty, this.GetOrCreateBinding(StrokeThicknessProperty, nameof(StrokeThickness)));
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path.SetBinding(Shape.StrokeDashArrayProperty, this.GetOrCreateBinding(StrokeDashArrayProperty, nameof(StrokeDashArray)));
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path.SetBinding(Shape.StrokeDashOffsetProperty, this.GetOrCreateBinding(StrokeDashOffsetProperty, nameof(StrokeDashOffset)));
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path.SetBinding(Shape.StrokeDashCapProperty, this.GetOrCreateBinding(StrokeDashCapProperty, nameof(StrokeDashCap)));
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Children.Add(path);
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}
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var maxLocation = projection.MapToLocation(new Point(0d, 180d * MapProjection.Wgs84MeterPerDegree));
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var maxLatitude = maxLocation != null && maxLocation.Latitude < 90d ? maxLocation.Latitude : 90d;
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var bounds = map.ViewRectToBoundingBox(new Rect(0d, 0d, map.RenderSize.Width, map.RenderSize.Height));
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var lineDistance = GetLineDistance();
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var labelStart = new Location(
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Math.Ceiling(bounds.South / lineDistance) * lineDistance,
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Math.Ceiling(bounds.West / lineDistance) * lineDistance);
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var labelEnd = new Location(
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Math.Floor(bounds.North / lineDistance) * lineDistance,
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Math.Floor(bounds.East / lineDistance) * lineDistance);
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var lineStart = new Location(
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Math.Min(Math.Max(labelStart.Latitude - lineDistance, -maxLatitude), maxLatitude),
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labelStart.Longitude - lineDistance);
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var lineEnd = new Location(
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Math.Min(Math.Max(labelEnd.Latitude + lineDistance, -maxLatitude), maxLatitude),
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labelEnd.Longitude + lineDistance);
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var geometry = (PathGeometry)path.Data;
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geometry.Figures.Clear();
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for (var lat = labelStart.Latitude; lat <= bounds.North; lat += lineDistance)
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{
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var figure = new PathFigure
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{
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StartPoint = map.LocationToView(new Location(lat, lineStart.Longitude)),
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IsClosed = false,
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IsFilled = false
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};
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figure.Segments.Add(new LineSegment
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{
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Point = map.LocationToView(new Location(lat, lineEnd.Longitude))
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});
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geometry.Figures.Add(figure);
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}
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for (var lon = labelStart.Longitude; lon <= bounds.East; lon += lineDistance)
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{
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var figure = new PathFigure
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{
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StartPoint = map.LocationToView(new Location(lineStart.Latitude, lon)),
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IsClosed = false,
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IsFilled = false
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};
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figure.Segments.Add(new LineSegment
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{
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Point = map.LocationToView(new Location(lineEnd.Latitude, lon))
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});
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geometry.Figures.Add(figure);
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}
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var labelFormat = GetLabelFormat(lineDistance);
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var childIndex = 1; // 0 for Path
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for (var lat = labelStart.Latitude; lat <= bounds.North; lat += lineDistance)
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{
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for (var lon = labelStart.Longitude; lon <= bounds.East; lon += lineDistance)
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{
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TextBlock label;
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if (childIndex < Children.Count)
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{
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label = (TextBlock)Children[childIndex];
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}
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else
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{
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label = new TextBlock { RenderTransform = new MatrixTransform() };
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label.SetBinding(TextBlock.FontSizeProperty, this.GetOrCreateBinding(FontSizeProperty, nameof(FontSize)));
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label.SetBinding(TextBlock.FontStyleProperty, this.GetOrCreateBinding(FontStyleProperty, nameof(FontStyle)));
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label.SetBinding(TextBlock.FontStretchProperty, this.GetOrCreateBinding(FontStretchProperty, nameof(FontStretch)));
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label.SetBinding(TextBlock.FontWeightProperty, this.GetOrCreateBinding(FontWeightProperty, nameof(FontWeight)));
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label.SetBinding(TextBlock.ForegroundProperty, this.GetOrCreateBinding(ForegroundProperty, nameof(Foreground)));
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if (FontFamily != null)
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{
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label.SetBinding(TextBlock.FontFamilyProperty, this.GetOrCreateBinding(FontFamilyProperty, nameof(FontFamily)));
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}
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Children.Add(label);
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}
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childIndex++;
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label.Text = GetLabelText(lat, labelFormat, "NS") + "\n" + GetLabelText(Location.NormalizeLongitude(lon), labelFormat, "EW");
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label.Tag = new Location(lat, lon);
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label.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
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}
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while (Children.Count > childIndex)
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{
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Children.RemoveAt(Children.Count - 1);
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}
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}
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// don't use MapPanel.Location because labels may be at more than 180° distance from map center
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for (int i = 1; i < Children.Count; i++)
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{
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var label = (TextBlock)Children[i];
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var location = (Location)label.Tag;
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var viewPosition = map.LocationToView(location);
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var matrix = new Matrix(1, 0, 0, 1, 0, 0);
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matrix.Translate(StrokeThickness / 2d + 2d, -label.DesiredSize.Height / 2d);
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matrix.Rotate(map.ViewTransform.Rotation);
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matrix.Translate(viewPosition.X, viewPosition.Y);
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((MatrixTransform)label.RenderTransform).Matrix = matrix;
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}
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DrawCylindricalGraticule(pathFigures, labels);
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}
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else if (path != null)
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else
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{
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path = null;
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Children.Clear();
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DrawGraticule(pathFigures, labels);
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}
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if (Children.Count == 0)
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{
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path.SetBinding(Shape.StrokeProperty, this.GetOrCreateBinding(StrokeProperty, nameof(Stroke)));
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path.SetBinding(Shape.StrokeThicknessProperty, this.GetOrCreateBinding(StrokeThicknessProperty, nameof(StrokeThickness)));
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path.SetBinding(Shape.StrokeDashArrayProperty, this.GetOrCreateBinding(StrokeDashArrayProperty, nameof(StrokeDashArray)));
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path.SetBinding(Shape.StrokeDashOffsetProperty, this.GetOrCreateBinding(StrokeDashOffsetProperty, nameof(StrokeDashOffset)));
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path.SetBinding(Shape.StrokeDashCapProperty, this.GetOrCreateBinding(StrokeDashCapProperty, nameof(StrokeDashCap)));
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Children.Add(path);
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}
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var childrenCount = 1;
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foreach (var label in labels)
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{
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TextBlock textBlock;
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if (childrenCount < Children.Count)
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{
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textBlock = (TextBlock)Children[childrenCount];
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}
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else
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{
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textBlock = new TextBlock { RenderTransform = new MatrixTransform() };
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textBlock.SetBinding(TextBlock.FontSizeProperty, this.GetOrCreateBinding(FontSizeProperty, nameof(FontSize)));
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textBlock.SetBinding(TextBlock.FontStyleProperty, this.GetOrCreateBinding(FontStyleProperty, nameof(FontStyle)));
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textBlock.SetBinding(TextBlock.FontStretchProperty, this.GetOrCreateBinding(FontStretchProperty, nameof(FontStretch)));
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textBlock.SetBinding(TextBlock.FontWeightProperty, this.GetOrCreateBinding(FontWeightProperty, nameof(FontWeight)));
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textBlock.SetBinding(TextBlock.ForegroundProperty, this.GetOrCreateBinding(ForegroundProperty, nameof(Foreground)));
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if (FontFamily != null)
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{
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textBlock.SetBinding(TextBlock.FontFamilyProperty, this.GetOrCreateBinding(FontFamilyProperty, nameof(FontFamily)));
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}
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Children.Add(textBlock);
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}
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textBlock.Text = label.LatitudeText + "\n" + label.LongitudeText;
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textBlock.Measure(new Size(double.PositiveInfinity, double.PositiveInfinity));
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var matrix = new Matrix(1, 0, 0, 1, 0, 0);
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matrix.Translate(StrokeThickness / 2d + 2d, -textBlock.DesiredSize.Height / 2d);
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matrix.Rotate(label.Rotation);
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matrix.Translate(label.Position.X, label.Position.Y);
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((MatrixTransform)textBlock.RenderTransform).Matrix = matrix;
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childrenCount++;
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}
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while (Children.Count > childrenCount)
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{
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Children.RemoveAt(Children.Count - 1);
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}
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base.OnViewportChanged(e);
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}
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private static PathFigure CreatePolylineFigure(ICollection<Point> points)
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{
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var figure = new PathFigure
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{
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StartPoint = points.First(),
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IsFilled = false
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};
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var polyline = new PolyLineSegment();
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foreach (var p in points.Skip(1))
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{
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polyline.Points.Add(p);
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}
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figure.Segments.Add(polyline);
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return figure;
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}
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}
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}
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