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Added MapPolypoint base class

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ClemensFischer 2024-05-26 09:49:00 +02:00
parent aeb3fd047f
commit 84890090f8
11 changed files with 357 additions and 317 deletions
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56
MapControl/Avalonia/MapPath.Avalonia.cs
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@ -4,10 +4,6 @@
using Avalonia.Controls.Shapes;
using Avalonia.Media;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
namespace MapControl
{
@ -43,57 +39,5 @@ namespace MapControl
InvalidateVisual();
}
#region Methods used only by derived classes MapPolyline, MapPolygon and MapMultiPolygon
protected void DataCollectionPropertyChanged(IEnumerable oldValue, IEnumerable newValue)
{
if (oldValue is INotifyCollectionChanged oldCollection)
{
oldCollection.CollectionChanged -= DataCollectionChanged;
}
if (newValue is INotifyCollectionChanged newCollection)
{
newCollection.CollectionChanged += DataCollectionChanged;
}
UpdateData();
}
protected void DataCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
UpdateData();
}
protected void SetPathFigures(PathFigures pathFigures)
{
((PathGeometry)Data).Figures = pathFigures;
InvalidateGeometry();
}
protected void AddPolylinePoints(PathFigures pathFigures, IEnumerable<Location> locations, double longitudeOffset, bool closed)
{
if (locations.Count() >= 2)
{
var points = locations
.Select(location => LocationToView(location, longitudeOffset))
.Where(point => point.HasValue)
.Select(point => point.Value);
var figure = new PathFigure
{
StartPoint = points.First(),
IsClosed = closed,
IsFilled = true
};
figure.Segments.Add(new PolyLineSegment(points.Skip(1)));
pathFigures.Add(figure);
}
}
#endregion
}
}

90
MapControl/Avalonia/MapPolypoint.Avalonia.cs Normal file
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@ -0,0 +1,90 @@
// XAML Map Control - https://github.com/ClemensFischer/XAML-Map-Control
// Copyright © 2024 Clemens Fischer
// Licensed under the Microsoft Public License (Ms-PL)
using Avalonia.Media;
using System.Collections;
using System.Collections.Generic;
using System.Collections.Specialized;
using System.Linq;
namespace MapControl
{
/// <summary>
/// Base class of MapPolyline and MapPolygon.
/// </summary>
public class MapPolypoint : MapPath
{
public static readonly StyledProperty<FillRule> FillRuleProperty =
DependencyPropertyHelper.Register<MapPolygon, FillRule>(nameof(FillRule), FillRule.EvenOdd,
(polypoint, oldValue, newValue) => ((PathGeometry)polypoint.Data).FillRule = newValue);
public FillRule FillRule
{
get => GetValue(FillRuleProperty);
set => SetValue(FillRuleProperty, value);
}
protected MapPolypoint()
{
Data = new PathGeometry();
}
protected void DataCollectionPropertyChanged(IEnumerable oldValue, IEnumerable newValue)
{
if (oldValue is INotifyCollectionChanged oldCollection)
{
oldCollection.CollectionChanged -= DataCollectionChanged;
}
if (newValue is INotifyCollectionChanged newCollection)
{
newCollection.CollectionChanged += DataCollectionChanged;
}
UpdateData();
}
protected void DataCollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
UpdateData();
}
protected void UpdateData(IEnumerable<Location> locations, bool closed)
{
var pathFigures = new PathFigures();
if (ParentMap != null && locations != null)
{
var longitudeOffset = GetLongitudeOffset(Location ?? locations.FirstOrDefault());
AddPolylinePoints(pathFigures, locations, longitudeOffset, closed);
}
((PathGeometry)Data).Figures = pathFigures;
InvalidateGeometry();
}
protected void AddPolylinePoints(PathFigures pathFigures, IEnumerable<Location> locations, double longitudeOffset, bool closed)
{
if (locations.Count() >= 2)
{
var points = locations
.Select(location => LocationToView(location, longitudeOffset))
.Where(point => point.HasValue)
.Select(point => point.Value);
var figure = new PathFigure
{
StartPoint = points.First(),
IsClosed = closed,
IsFilled = true
};
figure.Segments.Add(new PolyLineSegment(points.Skip(1)));
pathFigures.Add(figure);
}
}
}
}