diff --git a/MapControl/Shared/MapGraticule.cs b/MapControl/Shared/MapGraticule.cs
index 6ef6c2a5..d59c6dcb 100644
--- a/MapControl/Shared/MapGraticule.cs
+++ b/MapControl/Shared/MapGraticule.cs
@@ -3,13 +3,20 @@
// Licensed under the Microsoft Public License (Ms-PL)
using System;
+using System.Collections.Generic;
using System.Globalization;
+using System.Linq;
#if WINUI
using Microsoft.UI.Xaml;
+using Microsoft.UI.Xaml.Media;
+using Windows.Foundation;
#elif UWP
+using Windows.Foundation;
using Windows.UI.Xaml;
+using Windows.UI.Xaml.Media;
#else
using System.Windows;
+using System.Windows.Media;
#endif
namespace MapControl
@@ -19,9 +26,22 @@ namespace MapControl
///
public partial class MapGraticule : MapOverlay
{
+ private class Label
+ {
+ public string LatitudeText { get; set; }
+ public string LongitudeText { get; set; }
+ public Point Position { get; set; }
+ public double Rotation { get; set; }
+ }
+
+ private const double LineInterpolationResolution = 2d;
+
public static readonly DependencyProperty MinLineDistanceProperty = DependencyProperty.Register(
nameof(MinLineDistance), typeof(double), typeof(MapGraticule), new PropertyMetadata(150d));
+ private double lineDistance;
+ private string labelFormat;
+
///
/// Minimum graticule line distance in pixels. The default value is 150.
///
@@ -31,7 +51,7 @@ namespace MapControl
set { SetValue(MinLineDistanceProperty, value); }
}
- private double GetLineDistance()
+ private void SetLineDistance()
{
var minDistance = MinLineDistance / PixelPerLongitudeDegree(ParentMap.Center);
var scale = minDistance < 1d / 60d ? 3600d : minDistance < 1d ? 60d : 1d;
@@ -45,7 +65,10 @@ namespace MapControl
i++;
}
- return Math.Min(lineDistances[i] / scale, 30d);
+ lineDistance = Math.Min(lineDistances[i] / scale, 30d);
+
+ labelFormat = lineDistance < 1d / 60d ? "{0} {1}°{2:00}'{3:00}\""
+ : lineDistance < 1d ? "{0} {1}°{2:00}'" : "{0} {1}°";
}
private double PixelPerLongitudeDegree(Location location)
@@ -55,13 +78,7 @@ namespace MapControl
Math.Cos(location.Latitude * Math.PI / 180d) * MapProjection.Wgs84MeterPerDegree);
}
- private static string GetLabelFormat(double lineDistance)
- {
- return lineDistance < 1d / 60d ? "{0} {1}°{2:00}'{3:00}\""
- : lineDistance < 1d ? "{0} {1}°{2:00}'" : "{0} {1}°";
- }
-
- private static string GetLabelText(double value, string format, string hemispheres)
+ private string GetLabelText(double value, string hemispheres)
{
var hemisphere = hemispheres[0];
@@ -76,7 +93,252 @@ namespace MapControl
var seconds = (int)Math.Round(value * 3600d);
return string.Format(CultureInfo.InvariantCulture,
- format, hemisphere, seconds / 3600, seconds / 60 % 60, seconds % 60);
+ labelFormat, hemisphere, seconds / 3600, seconds / 60 % 60, seconds % 60);
+ }
+
+ private void AddLabel(ICollection