fix: build

src/Uno.Toolkit.UI/Controls/ZoomContentControl/ZoomContentControl.cs

@@ -289,10 +289,11 @@ private void OnPointerMoved(object sender, PointerRoutedEventArgs e)
 		if (_capturedPointerContext is { } context)
 		{
 			var position = e.GetCurrentPoint(this).Position;
-			var delta = context.Position - position;
+			var delta = new Point(context.Position.X - position.X, context.Position.Y - position.Y);
 			delta.X *= -1;
 
-			SetScrollValue(context.ScrollOffset + delta);
+			var newScrollOffset = new Point(context.ScrollOffset.X + delta.X, context.ScrollOffset.Y + delta.Y);
+			SetScrollValue(newScrollOffset);
 		}
 	}
 
@@ -306,7 +307,7 @@ private void OnPointerWheelChanged(object sender, PointerRoutedEventArgs e)
 #if IS_WINUI
 			p.PointerDeviceType != PointerDeviceType.Mouse
 #else
-			p.PointerDevice.PointerDeviceType != PointerDeviceType.Mouse
+        p.PointerDevice.PointerDeviceType != PointerDeviceType.Mouse
 #endif
 		) return;
 
@@ -315,16 +316,21 @@ private void OnPointerWheelChanged(object sender, PointerRoutedEventArgs e)
 		{
 			if (!IsZoomAllowed) return;
 
-			var oldPosition = (p.Position - vp.ActualSize.ToPoint().DivideBy(2)) - ScrollValue.MultiplyBy(1, -1);
-			var basePosition = oldPosition.DivideBy(ZoomLevel);
+			var oldPositionX = p.Position.X - (vp.ActualSize.X / 2) - ScrollValue.X * 1;
+			var oldPositionY = p.Position.Y - (vp.ActualSize.Y / 2) - ScrollValue.Y * (-1);
+			var oldPosition = new Point(oldPositionX, oldPositionY);
+
+			var basePosition = new Point(oldPosition.X / ZoomLevel, oldPosition.Y / ZoomLevel);
 
 			var newZoom = ZoomLevel * (1 + p.Properties.MouseWheelDelta * ScaleWheelRatio);
 			//var newZoom = ZoomLevel + Math.Sign(p.Properties.MouseWheelDelta);
 			newZoom = Math.Clamp(newZoom, MinZoomLevel, MaxZoomLevel);
 
-			var newPosition = basePosition.MultiplyBy(newZoom);
-			var delta = (newPosition - oldPosition).MultiplyBy(-1, 1);
-			var offset = ScrollValue + delta;
+			var newPosition = new Point(basePosition.X * newZoom, basePosition.Y * newZoom);
+			var deltaX = newPosition.X - oldPosition.X;
+			var deltaY = newPosition.Y - oldPosition.Y;
+			var delta = new Point(deltaX * -1, deltaY * 1);
+			var offset = new Point(ScrollValue.X + delta.X, ScrollValue.Y + delta.Y);
 
 			// note: updating ZoomLevel can have side effects on ScrollValue:
 			// ZoomLevel --UpdateScrollBars-> ScrollBar.Maximum --clamp-> ScrollBar.Value --bound-> H/VScrollValue
@@ -342,7 +348,7 @@ private void OnPointerWheelChanged(object sender, PointerRoutedEventArgs e)
 			var delta = e.KeyModifiers.HasFlag(Windows.System.VirtualKeyModifiers.Shift)
 				? new Point(magnitude, 0)
 				: new Point(0, -magnitude);
-			var offset = ScrollValue + delta;
+			var offset = new Point(ScrollValue.X + delta.X, ScrollValue.Y + delta.Y);
 
 			SetScrollValue(offset);
 			e.Handled = true;