ClemensFischer/XAML-Map-Control
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Add MapItem.MapTransform property

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ClemensFischer 2022-11-06 15:27:39 +01:00
parent b253d0696a
commit 85cc01f086
5 changed files with 76 additions and 9 deletions
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33
MapControl/Shared/MapItemsControl.cs
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@ -8,15 +8,19 @@ using Windows.Foundation;
using Microsoft.UI.Xaml;
using Microsoft.UI.Xaml.Controls;
using Microsoft.UI.Xaml.Data;
using Microsoft.UI.Xaml.Media;
#elif UWP
using Windows.Foundation;
using Windows.UI.Xaml;
using Windows.UI.Xaml.Controls;
using Windows.UI.Xaml.Data;
using Windows.UI.Xaml.Media;
#else
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Markup;
using System.Windows.Media;
#endif
namespace MapControl
@ -43,6 +47,35 @@ namespace MapControl
get => (Location)GetValue(LocationProperty);
set => SetValue(LocationProperty, value);
}
/// <summary>
/// Gets a Transform for scaling and rotating geometries
/// in map coordinates (meters) to view coordinates (pixels).
/// </summary>
public Transform MapTransform
{
get => mapTransform ?? (mapTransform = new MatrixTransform());
}
private MatrixTransform mapTransform;
protected override Size ArrangeOverride(Size bounds)
{
if (mapTransform != null) // property in use, e.g. as source of a Binding
{
var parentMap = (VisualTreeHelper.GetParent(this) as MapPanel)?.ParentMap;
if (parentMap != null && Location != null)
{
var scale = parentMap.GetScale(Location);
var matrix = new Matrix(scale.X, 0d, 0d, scale.Y, 0d, 0d);
matrix.Rotate(parentMap.ViewTransform.Rotation);
mapTransform.Matrix = matrix;
}
}
return base.ArrangeOverride(bounds);
}
}
/// <summary>

2
MapControl/Shared/MapPanel.cs
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@ -98,7 +98,7 @@ namespace MapControl
}
/// <summary>
/// Gets the position of an element with Location in view coordinates,
/// Gets the view position of an element with Location
/// or null when the element has no Location.
/// </summary>
public static Point? GetViewPosition(FrameworkElement element)