/// <summary> /// The constructor takes the geometry to hit test with. /// </summary> public GeometryHitTestParameters(Geometry geometry) : base() { // This ctor guarantees that we are initialized in the following way: // // 1. The geometry provided by the user is unmodified // 2. _hitGeometryInternal is a PathGeometry equivilent to the supplied geometry // 3. _hitGeometryInternal.Tranform is a MatrixTransform equivilent to the supplied // geometry.Transform // 4. _origBounds is the untransformed bounds of the _hitGeometryInternal (inner space). // 5. _bounds is the transformed bounds of the _hitGeometryInternal (outer space). // 6. _matrixStack is an empty stack. if (geometry == null) { throw new ArgumentNullException("geometry"); } // Convert the Geometry to an equivilent PathGeometry up front to prevent // conversion on every call to DoesContainWithDetail. If the geometry is // animate this also has the side effect of eliminating animation interplay. _hitGeometryInternal = geometry.GetAsPathGeometry(); // If GetAsPathGeometry was a no-op, force the copy because we do not // went to modify the user's Geometry. if (object.ReferenceEquals(_hitGeometryInternal, geometry)) { _hitGeometryInternal = _hitGeometryInternal.Clone(); } // Convert _hitGeometryInternal.Transform to an equivilent MatrixTransform // so that we can aggregate in PushMatrix/PopMatrix without building a // TransformCollection. Transform origTransform = _hitGeometryInternal.Transform; MatrixTransform newTransform = new MatrixTransform(); _hitGeometryInternal.Transform = newTransform; // Before we initialize MatrixTransform.Matrix, cache the bounds of this // geometry without any transforms. _origBounds = _hitGeometryInternal.Bounds; // If we had a non-Identity transform, update our MatrixTransform.Matrix // with its Value. (Note that when GetAsPathGeometry *isn't* a no-op // it applies the transform to the figures and returns with a Geometry // with an identity Transform.) if (origTransform != null && !origTransform.IsIdentity) { newTransform.Matrix = origTransform.Value; } // Initialize the current transformed bounds of this Geometry _bounds = _hitGeometryInternal.Bounds; _matrixStack = new MatrixStack(); }
/// <summary> /// The constructor takes the geometry to hit test with. /// </summary> public GeometryHitTestParameters(Geometry geometry) : base() { // This ctor guarantees that we are initialized in the following way: // // 1. The geometry provided by the user is unmodified // 2. _hitGeometryInternal is a PathGeometry equivilent to the supplied geometry // 3. _hitGeometryInternal.Tranform is a MatrixTransform equivilent to the supplied // geometry.Transform // 4. _origBounds is the untransformed bounds of the _hitGeometryInternal (inner space). // 5. _bounds is the transformed bounds of the _hitGeometryInternal (outer space). // 6. _matrixStack is an empty stack. if (geometry == null) { throw new ArgumentNullException("geometry"); } // Convert the Geometry to an equivilent PathGeometry up front to prevent // conversion on every call to DoesContainWithDetail. If the geometry is // animate this also has the side effect of eliminating animation interplay. _hitGeometryInternal = geometry.GetAsPathGeometry(); // If GetAsPathGeometry was a no-op, force the copy because we do not // went to modify the user's Geometry. if (object.ReferenceEquals(_hitGeometryInternal, geometry)) { _hitGeometryInternal = _hitGeometryInternal.Clone(); } // Convert _hitGeometryInternal.Transform to an equivilent MatrixTransform // so that we can aggregate in PushMatrix/PopMatrix without building a // TransformCollection. Transform origTransform = _hitGeometryInternal.Transform; MatrixTransform newTransform = new MatrixTransform(); _hitGeometryInternal.Transform = newTransform; // Before we initialize MatrixTransform.Matrix, cache the bounds of this // geometry without any transforms. _origBounds = _hitGeometryInternal.Bounds; // If we had a non-Identity transform, update our MatrixTransform.Matrix // with its Value. (Note that when GetAsPathGeometry *isn't* a no-op // it applies the transform to the figures and returns with a Geometry // with an identity Transform.) if (origTransform != null && !origTransform.IsIdentity) { newTransform.Matrix = origTransform.Value; } // Initialize the current transformed bounds of this Geometry _bounds = _hitGeometryInternal.Bounds; _matrixStack = new MatrixStack(); }