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Update ViewTransform.cs

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ClemensFischer 2026-01-08 22:34:42 +01:00
parent 17452582b4
commit 57913c0cf4
1 changed files with 22 additions and 10 deletions
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32
MapControl/Shared/ViewTransform.cs
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@ -1,10 +1,7 @@
#if WPF
using System;
#if WPF
using System.Windows;
using System.Windows.Media;
#elif UWP
using Windows.UI.Xaml.Media;
#elif WINUI
using Microsoft.UI.Xaml.Media;
#elif AVALONIA
using Avalonia;
#endif
@ -122,11 +119,26 @@ namespace MapControl
private static Rect TransformBounds(Matrix transform, Rect rect)
{
#if AVALONIA
return rect.TransformToAABB(transform);
#else
return new MatrixTransform { Matrix = transform }.TransformBounds(rect);
#endif
if (transform.M12 == 0d && transform.M21 == 0d)
{
return new Rect(
rect.X * transform.M11 + transform.OffsetX,
rect.Y * transform.M22 + transform.OffsetY,
rect.Width * transform.M11,
rect.Height * transform.M22);
}
var p1 = transform.Transform(new Point(rect.X, rect.Y));
var p2 = transform.Transform(new Point(rect.X, rect.Y + rect.Height));
var p3 = transform.Transform(new Point(rect.X + rect.Width, rect.Y));
var p4 = transform.Transform(new Point(rect.X + rect.Width, rect.Y + rect.Height));
var x1 = Math.Min(p1.X, Math.Min(p2.X, Math.Min(p3.X, p4.X)));
var y1 = Math.Min(p1.Y, Math.Min(p2.Y, Math.Min(p3.Y, p4.Y)));
var x2 = Math.Max(p1.X, Math.Max(p2.X, Math.Max(p3.X, p4.X)));
var y2 = Math.Max(p1.Y, Math.Max(p2.Y, Math.Max(p3.Y, p4.Y)));
return new Rect(x1, y1, x2 - x1, y2 - y1);
}
}
}