private void pointBindToCanvas(RelativePoint p, Canvas c)
{
Binding canvasWidth = new Binding("ActualWidth");
canvasWidth.Source = c;
p.SetBinding(RelativePoint.CanvasWidthProperty, canvasWidth);
Binding canvasHeight = new Binding("ActualHeight");
canvasHeight.Source = c;
p.SetBinding(RelativePoint.CanvasHeightProperty, canvasHeight);
}
private static void LayoutChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
RelativePoint me = d as RelativePoint;
Point location = me.getPixelLocation();
Canvas.SetLeft(me, location.X);
Canvas.SetTop(me, location.Y);
me.PositionChanged?.Invoke(me, new PositionChangedEventArgs()
{
NewX = me.XPosition, NewY = me.YPosition
});
}
private RelativePoint makeGuidePoint()
{
RelativePoint p = new RelativePoint()
{
Stroke = darkOrange, Diameter = 8
};
Panel.SetZIndex(p, 2);
p.XMin = p.YMin = -6;
p.XMax = p.YMax = 6;
pointBindToCanvas(p, Plotter);
return(p);
}
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;
}
