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Updated MapScale

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ClemensFischer 2026-01-20 11:43:00 +01:00
parent fe29f0ecfa
commit 25d4e13c16
1 changed files with 36 additions and 39 deletions
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75
MapControl/Shared/MapScale.cs
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@ -4,21 +4,18 @@ using System.Globalization;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Media;
using System.Windows.Shapes;
#elif UWP
using Windows.Foundation;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Media;
using Windows.UI.Xaml.Shapes;
#elif WINUI
using Windows.Foundation;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Data;
using Microsoft.UI.Xaml.Media;
using Microsoft.UI.Xaml.Shapes;
#elif AVALONIA
using Avalonia;
@ -26,7 +23,6 @@ using Avalonia.Controls;
using Avalonia.Controls.Shapes;
using Avalonia.Data;
using Avalonia.Layout;
using PointCollection = System.Collections.Generic.List<Avalonia.Point>;
using PropertyPath = System.String;
#endif
@ -88,44 +84,45 @@ namespace MapControl
protected override Size MeasureOverride(Size availableSize)
{
if (ParentMap == null)
var size = new Size();
if (ParentMap != null)
{
return new Size();
var x0 = ParentMap.ActualWidth / 2d;
var y0 = ParentMap.ActualHeight / 2d;
var p1 = ParentMap.ViewToLocation(new Point(x0 - 50d, y0));
var p2 = ParentMap.ViewToLocation(new Point(x0 + 50d, y0));
if (p1 != null && p2 != null)
{
var scale = 100d / p1.GetDistance(p2);
var length = MinWidth / scale;
var magnitude = Math.Pow(10d, Math.Floor(Math.Log10(length)));
length = length / magnitude < 2d ? 2d * magnitude
: length / magnitude < 5d ? 5d * magnitude
: 10d * magnitude;
size = new Size(
length * scale + StrokeThickness + Padding.Left + Padding.Right,
1.5 * label.FontSize + 2 * StrokeThickness + Padding.Top + Padding.Bottom);
var x1 = Padding.Left + StrokeThickness / 2d;
var x2 = size.Width - Padding.Right - StrokeThickness / 2d;
var y1 = size.Height / 2d;
var y2 = size.Height - Padding.Bottom - StrokeThickness / 2d;
line.Points = [new Point(x1, y1), new Point(x1, y2), new Point(x2, y2), new Point(x2, y1)];
label.Text = length >= 1000d
? string.Format(CultureInfo.InvariantCulture, "{0:F0} km", length / 1000d)
: string.Format(CultureInfo.InvariantCulture, "{0:F0} m", length);
line.Measure(size);
label.Measure(size);
}
}
var p = ParentMap.GetMapToViewTransform(ParentMap.Center).Transform(new Point(1d, 0d));
var scale = Math.Sqrt(p.X * p.X + p.Y * p.Y);
var length = MinWidth / scale;
var magnitude = Math.Pow(10d, Math.Floor(Math.Log10(length)));
length = length / magnitude < 2d ? 2d * magnitude
: length / magnitude < 5d ? 5d * magnitude
: 10d * magnitude;
var size = new Size(
length * scale + StrokeThickness + Padding.Left + Padding.Right,
1.5 * label.FontSize + 2 * StrokeThickness + Padding.Top + Padding.Bottom);
var x1 = Padding.Left + StrokeThickness / 2d;
var x2 = size.Width - Padding.Right - StrokeThickness / 2d;
var y1 = size.Height / 2d;
var y2 = size.Height - Padding.Bottom - StrokeThickness / 2d;
line.Points = new PointCollection
{
new Point(x1, y1),
new Point(x1, y2),
new Point(x2, y2),
new Point(x2, y1)
};
label.Text = length >= 1000d
? string.Format(CultureInfo.InvariantCulture, "{0:F0} km", length / 1000d)
: string.Format(CultureInfo.InvariantCulture, "{0:F0} m", length);
line.Measure(size);
label.Measure(size);
return size;
}