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MapPolypoint implementation

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ClemensFischer 2024-07-15 13:41:52 +02:00
parent e8d4e47a45
commit 4e6d0db24f
3 changed files with 31 additions and 148 deletions
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30
MapControl/Avalonia/MapPolypoint.Avalonia.cs
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@ -51,31 +51,39 @@ namespace MapControl
protected void UpdateData(IEnumerable<Location> locations, bool closed)
{
var pathFigure = new PathFigure();
var pathFigures = new PathFigures();
if (ParentMap != null && locations?.Count() >= 2)
if (ParentMap != null && locations != null)
{
var longitudeOffset = GetLongitudeOffset(Location ?? locations.First());
var longitudeOffset = GetLongitudeOffset(Location ?? locations.FirstOrDefault());
AddPolylinePoints(pathFigure, locations, longitudeOffset, closed);
AddPolylinePoints(pathFigures, locations, longitudeOffset, closed);
}
((PathGeometry)Data).Figures = new PathFigures { pathFigure };
((PathGeometry)Data).Figures = pathFigures;
InvalidateGeometry(); // ignores an empty PathGeometry.Figures collection
InvalidateGeometry();
}
private void AddPolylinePoints(PathFigure pathFigure, IEnumerable<Location> locations, double longitudeOffset, bool closed)
private void AddPolylinePoints(PathFigures pathFigures, IEnumerable<Location> locations, double longitudeOffset, bool closed)
{
var points = locations
.Select(location => LocationToView(location, longitudeOffset))
.Where(point => point.HasValue)
.Select(point => point.Value);
pathFigure.StartPoint = points.First();
pathFigure.Segments.Add(new PolyLineSegment(points.Skip(1)));
pathFigure.IsClosed = closed;
pathFigure.IsFilled = true;
if (points.Any())
{
var figure = new PathFigure
{
StartPoint = points.First(),
IsClosed = closed,
IsFilled = true
};
figure.Segments.Add(new PolyLineSegment(points.Skip(1)));
pathFigures.Add(figure);
}
}
}
}