private void DeleteAt(int index)
{
while (Paths.Items.Count > index)
{
Path item = Paths.Items[index] as Path;
item.PropertyChanged -= P_PropertyChanged;
foreach (RelativePoint p in item.OwnedPoints)
{
Plotter.Children.Remove(p);
}
Plotter.Children.Remove(item.OwnedPolyline);
NonDependencyBinding.CleanupBindingSource(item);
Paths.Items.RemoveAt(index);
}
Paths.SelectedIndex = -1;
Paths.SelectedItem = null;
}
private void Paths_ItemAdded(object item)
{
Path p = item as Path;
Paths.SelectedItem = p;
if (Paths.Items.Count == 1)
{
//this is the only path
p.SetStartPoint(originX.Value ?? 0, originY.Value ?? 0);
//Todo: make this a binding as well
Binding firstX = new Binding("StartX");
firstX.Mode = BindingMode.TwoWay;
firstX.Source = p;
BindingOperations.SetBinding(originX, DoubleUpDown.ValueProperty, firstX);
Binding firstY = new Binding("StartY");
firstY.Mode = BindingMode.TwoWay;
firstY.Source = p;
BindingOperations.SetBinding(originY, DoubleUpDown.ValueProperty, firstY);
}
else
{
Path prev = Paths.Items[Paths.Items.Count - 2] as Path;
p.SetStartPoint(prev.EndX, prev.EndY);
NonDependencyBinding.Create(prev, "EndX", p, "StartX");
NonDependencyBinding.Create(prev, "EndY", p, "StartY");
}
RelativePoint start = makeGuidePoint();
RelativePoint end = makeGuidePoint();
Binding startX = new Binding("StartX");
startX.Source = p;
start.SetBinding(RelativePoint.XPositionProperty, startX);
Binding startY = new Binding("StartY");
startY.Source = p;
start.SetBinding(RelativePoint.YPositionProperty, startY);
Binding endX = new Binding("EndX");
endX.Source = p;
end.SetBinding(RelativePoint.XPositionProperty, endX);
Binding endY = new Binding("EndY");
endY.Source = p;
end.SetBinding(RelativePoint.YPositionProperty, endY);
Plotter.Children.Add(start);
Plotter.Children.Add(end);
p.OwnedPoints.Add(start);
p.OwnedPoints.Add(end);
if (p is QuadraticPath)
{
RelativePoint mid = makeGuidePoint();
Binding gx = new Binding("GuidePointX");
gx.Source = p;
mid.SetBinding(RelativePoint.XPositionProperty, gx);
Binding gy = new Binding("GuidePointY");
gy.Source = p;
mid.SetBinding(RelativePoint.YPositionProperty, gy);
Plotter.Children.Add(mid);
p.OwnedPoints.Add(mid);
}
RenderPath(p);
//everything is now set. attach an event handler to re-render paths
p.PropertyChanged += P_PropertyChanged;
}
