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Improve Data handling in WPF MapPath

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ClemensFischer 2022-11-03 20:10:17 +01:00
parent 2652e5eb0f
commit 65c93d1a3e
2 changed files with 30 additions and 19 deletions
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28
MapControl/WPF/MapPath.WPF.cs
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@ -15,14 +15,7 @@ namespace MapControl
public partial class MapPath : Shape, IWeakEventListener
{
public static readonly DependencyProperty DataProperty = Path.DataProperty.AddOwner(
typeof(MapPath), new PropertyMetadata(null,
(o, e) =>
{
if (e.NewValue != e.OldValue) // Data is actually a new Geometry
{
((MapPath)o).UpdateData();
}
}));
typeof(MapPath), new PropertyMetadata(null, DataPropertyChanged));
public Geometry Data
{
@ -32,6 +25,25 @@ namespace MapControl
protected override Geometry DefiningGeometry => Data;
private static void DataPropertyChanged(DependencyObject obj, DependencyPropertyChangedEventArgs e)
{
if (e.NewValue != null && !ReferenceEquals(e.NewValue, e.OldValue)) // Data is actually a new Geometry
{
var path = (MapPath)obj;
var data = (Geometry)e.NewValue;
if (data.IsFrozen)
{
path.Data = data.Clone(); // DataPropertyChanged called again
}
else
{
data.Transform = new MatrixTransform();
path.UpdateData();
}
}
}
#region Methods used only by derived classes MapPolyline, MapPolygon and MapMultiPolygon
protected void DataCollectionPropertyChanged(DependencyPropertyChangedEventArgs e)