private void Bvm_PropertyChanged(object sender, PropertyChangedEventArgs e)
{
if (e.PropertyName == nameof(BezierViewModel.InterpolantPoints))
{
BezierViewModel bvm = (BezierViewModel)sender;
Primitives prim = m_prims.Single((p) => p.BVM == bvm);
RedrawPolyline(prim);
}
}
void RedrawPolyline(Primitives prim)
{
BezierViewModel bvm = prim.BVM;
Polyline lines = prim.Interpolant;
for (int ip = 0; ip < bvm.InterpolantPoints.Length; ip++)
{
Point lp = TransformPoint(bvm.InterpolantPoints[ip], new Size(), false);
lines.Points[ip] = lp;
}
}
void RedrawCircles(Primitives prim)
{
BezierViewModel bvm = prim.BVM;
for (int i = 0; i < bvm.Bezier.ControlPoints.Count; i++)
{
Ellipse e = prim.Points[i];
Point p = TransformPoint(bvm.Bezier.ControlPoints[i], e.RenderSize, true);
Canvas.SetLeft(e, p.X);
Canvas.SetTop(e, p.Y);
}
}
void RemoveBezier(BezierViewModel bvm)
{
Primitives prim = m_prims.Single((p) => p.BVM == bvm);
foreach (var point in prim.Points)
{
m_leftDescriptor.RemoveValueChanged(point, Ellipse_PositionChanged);
m_topDescriptor.RemoveValueChanged(point, Ellipse_PositionChanged);
DrawingCanvas.Children.Remove(point);
}
DrawingCanvas.Children.Remove(prim.Interpolant);
}
private void Beziers_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Add)
{
Bezier b = (Bezier)e.NewItems[0];
BezierViewModel bvm = new BezierViewModel(b, BezierModel.InterpolantResolutionToUse);
m_bezierViewModels.Add(bvm);
}
if (e.Action == NotifyCollectionChangedAction.Remove)
{
Bezier b = (Bezier)e.OldItems[0];
BezierViewModel bvm = m_bezierViewModels.Single((bv) => bv.Bezier == b);
m_bezierViewModels.Remove(bvm);
}
}
void AddBezier(BezierViewModel bvm)
{
Primitives prim = new Primitives();
prim.BVM = bvm;
//Draw points
m_circlesNotDragged = true;
for (int i = 0; i < bvm.Bezier.ControlPoints.Count; i++)
{
Ellipse e = new Ellipse();
e.Stroke = new SolidColorBrush(Colors.Black);
e.StrokeThickness = 5;
e.Fill = new SolidColorBrush(Colors.Gray);
e.Width = 40;
e.Height = 40;
m_leftDescriptor.AddValueChanged(e, Ellipse_PositionChanged);
m_topDescriptor.AddValueChanged(e, Ellipse_PositionChanged);
Point p = TransformPoint(bvm.Bezier.ControlPoints[i], new Size(e.Width, e.Height), true);
Canvas.SetLeft(e, p.X);
Canvas.SetTop(e, p.Y);
prim.Points.Add(e);
DrawingCanvas.Children.Add(e);
}
m_circlesNotDragged = false;
//Draw bezier
Polyline lines = new Polyline();
lines.Stroke = new SolidColorBrush(Colors.Black);
lines.StrokeThickness = 1;
for (int ip = 0; ip < bvm.InterpolantPoints.Length; ip++)
{
Point lp = TransformPoint(bvm.InterpolantPoints[ip], lines.RenderSize, false);
lines.Points.Add(lp);
}
prim.Interpolant = lines;
DrawingCanvas.Children.Add(lines);
m_prims.Add(prim);
}
private void BezierViewModels_CollectionChanged(object sender, NotifyCollectionChangedEventArgs e)
{
if (e.Action == NotifyCollectionChangedAction.Add)
{
BezierViewModel bvm = (BezierViewModel)e.NewItems[0];
WeakEventManager <BezierViewModel, PropertyChangedEventArgs> .AddHandler(bvm, "PropertyChanged", Bvm_PropertyChanged);
AddBezier(bvm);
}
if (e.Action == NotifyCollectionChangedAction.Remove)
{
BezierViewModel bvm = (BezierViewModel)e.OldItems[0];
WeakEventManager <BezierViewModel, PropertyChangedEventArgs> .RemoveHandler(bvm, "PropertyChanged", Bvm_PropertyChanged);
RemoveBezier(bvm);
}
}
