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MapPolypoint implementation

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ClemensFischer 2024-07-15 09:09:15 +02:00
parent d2c3382f46
commit cb01a6a12f
5 changed files with 165 additions and 201 deletions
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38
MapControl/Avalonia/MapPolypoint.Avalonia.cs
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@ -51,39 +51,31 @@ namespace MapControl
protected void UpdateData(IEnumerable<Location> locations, bool closed)
{
var pathFigures = new PathFigures();
var pathFigure = new PathFigure();
if (ParentMap != null && locations != null)
if (ParentMap != null && locations?.Count() >= 2)
{
var longitudeOffset = GetLongitudeOffset(Location ?? locations.FirstOrDefault());
var longitudeOffset = GetLongitudeOffset(Location ?? locations.First());
AddPolylinePoints(pathFigures, locations, longitudeOffset, closed);
AddPolylinePoints(pathFigure, locations, longitudeOffset, closed);
}
((PathGeometry)Data).Figures = pathFigures;
((PathGeometry)Data).Figures = new PathFigures { pathFigure };
InvalidateGeometry();
InvalidateGeometry(); // ignores an empty PathGeometry.Figures collection
}
private void AddPolylinePoints(PathFigures pathFigures, IEnumerable<Location> locations, double longitudeOffset, bool closed)
private void AddPolylinePoints(PathFigure pathFigure, 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 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);
}
pathFigure.StartPoint = points.First();
pathFigure.Segments.Add(new PolyLineSegment(points.Skip(1)));
pathFigure.IsClosed = closed;
pathFigure.IsFilled = true;
}
}
}