private void SyncGeometriesWithShapes()
{
if (_context?.Factory == null || Shapes == null)
{
return;
}
if (_lineStrokeStyle == null)
{
//create the default line stroke style
_lineStrokeStyle = new StrokeStyle(_d2dFactory, new StrokeStyleProperties
{
LineJoin = LineJoin.Round,
StartCap = CapStyle.Round,
EndCap = CapStyle.Round
});
}
foreach (var shape in Shapes)
{
if (_createdGeometries.ContainsKey(shape.GeometryHash))
{
continue;
}
//vector not created, make it here and store for later
var geometry = CreateGeometry(shape);
if (geometry != null)
{
if (!_createdGeometries.ContainsKey(geometry.GeometryHash))
{
_createdGeometries.Add(geometry.GeometryHash, geometry);
}
}
}
//get list of geometries that are no longer in the Shapes collection, and delete them
foreach (var geoHash in _createdGeometries.Keys.ToList())
{
if (Shapes.All(s => s.GeometryHash != geoHash))
{
_createdGeometries[geoHash].Dispose();
_createdGeometries.Remove(geoHash);
}
}
}
