private bool ApplyGeometryEffect(IGeometrySourceParameters parameters, bool force)
{
var flag = false;
var cachedGeometry = CachedGeometry;
var geometryEffect = parameters.GetGeometryEffect();
if (geometryEffect != null)
{
if (force)
{
flag = true;
geometryEffect.InvalidateGeometry(InvalidateGeometryReasons.ParentInvalidated);
}
if (geometryEffect.ProcessGeometry(CachedGeometry))
{
flag = true;
cachedGeometry = geometryEffect.OutputGeometry;
}
}
if (!Equals(Geometry, cachedGeometry))
{
flag = true;
Geometry = cachedGeometry;
}
return(flag);
}
public static GeometryEffect GetGeometryEffect(this IGeometrySourceParameters parameters)
{
if (parameters is DependencyObject obj2)
{
var geometryEffect = GeometryEffect.GetGeometryEffect(obj2);
if (geometryEffect != null && obj2.Equals(geometryEffect.Parent))
{
return(geometryEffect);
}
}
return(null);
}
public static double GetHalfStrokeThickness(this IGeometrySourceParameters parameter)
{
if (parameter.Stroke != null)
{
var strokeThickness = parameter.StrokeThickness;
if (!double.IsNaN(strokeThickness) && !double.IsInfinity(strokeThickness))
{
return(Math.Abs(strokeThickness) / 2.0);
}
}
return(0.0);
}
public bool UpdateGeometry(IGeometrySourceParameters parameters, Rect layoutBounds)
{
var force = false;
if (parameters is TParameters parameters1)
{
var rect = ComputeLogicalBounds(layoutBounds, parameters1);
force |= LayoutBounds != layoutBounds || LogicalBounds != rect;
if (_geometryInvalidated || force)
{
LayoutBounds = layoutBounds;
LogicalBounds = rect;
force |= UpdateCachedGeometry(parameters1);
force |= ApplyGeometryEffect(parameters1, force);
}
}
_geometryInvalidated = false;
return(force);
}
protected override Rect ComputeLogicalBounds(Rect layoutBounds, IGeometrySourceParameters parameters)
{
return(GeometryHelper.GetStretchBound(base.ComputeLogicalBounds(layoutBounds, parameters),
parameters.Stretch, new Size(1.0, 1.0)));
}
protected virtual Rect ComputeLogicalBounds(Rect layoutBounds, IGeometrySourceParameters parameters)
{
return(GeometryHelper.Inflate(layoutBounds, -parameters.GetHalfStrokeThickness()));
}