private void SchematicDisplay_DataContextChanged(object sender, DependencyPropertyChangedEventArgs e)
{
SchematicCanvas.Children.Clear();
Schematic schematic = (DataContext as Schematic);
if (schematic != null)
{
double minX = double.MaxValue;
double minY = double.MaxValue;
double maxX = 0;
double maxY = 0;
// Find the bounds of the schematic
foreach (Element element in schematic.Elements)
{
minX = Math.Min(element.LowerBound.x, minX);
maxX = Math.Max(element.UpperBound.x, maxX);
minY = Math.Min(element.LowerBound.y, minY);
maxY = Math.Max(element.UpperBound.y, maxY);
}
SchematicCanvas.Width = (Math.Abs(minX) + Math.Abs(maxX)) * 1.2;
SchematicCanvas.Height = (Math.Abs(minY) + Math.Abs(maxY)) * 1.2;
UpdateScale();
// Offset the origin by the center of the used region to center the schematic
Circuit.Coord origin = new Circuit.Coord((int)((SchematicCanvas.Width / 2) - ((minX + maxX) / 2)), (int)((SchematicCanvas.Height / 2) - ((minY + maxY) / 2)));
foreach (Element element in schematic.Elements)
{
ElementControl control = ElementControl.New(element);
SchematicCanvas.Children.Add(control);
Circuit.Coord lb = element.LowerBound;
Circuit.Coord ub = element.UpperBound;
Canvas.SetLeft(control, lb.x + origin.x);
Canvas.SetTop(control, lb.y + origin.y);
control.Width = ub.x - lb.x;
control.Height = ub.y - lb.y;
}
}
}
public bool IsConnectedTo(Coord x)
{
return(PointOnSegment(x, A, B));
}
public Wire(Coord A, Coord B) : this()
{
a = A;
b = B;
}
public static bool PointOnSegment(Coord x, Coord x1, Coord x2)
{
return(PointInRect(x, x1, x2) && PointOnLine(x, x1, x2));
}
public static bool PointOnLine(Coord x, Coord x1, Coord x2)
{
return((x2.x - x1.x) * (x.y - x1.y) == (x.x - x1.x) * (x2.y - x1.y));
}
private static bool PointInRect(Coord A, Coord x1, Coord x2)
{
return(((x1.x <= A.x && A.x <= x2.x) || (x2.x <= A.x && A.x <= x1.x)) &&
((x1.y <= A.y && A.y <= x2.y) || (x2.y <= A.y && A.y <= x1.y)));
}
public static bool SegmentsIntersect(Coord A, Coord B, Coord C, Coord D)
{
return(Ccw(A, C, D) != Ccw(B, C, D) && Ccw(A, B, C) != Ccw(A, B, D));
}
// http://www.bryceboe.com/2006/10/23/line-segment-intersection-algorithm/
private static bool Ccw(Coord A, Coord B, Coord C)
{
return((C.y - A.y) * (B.x - A.x) >= (B.y - A.y) * (C.x - A.x));
}
public override void RotateAround(int dt, Point at)
{
a = (Coord)Point.Round(RotateAround(a, dt, at));
b = (Coord)Point.Round(RotateAround(b, dt, at));
OnLayoutChanged();
}
public override void Move(Coord dx)
{
a += dx;
b += dx;
OnLayoutChanged();
}
public Node NodeAt(Coord x)
{
return(NodeAt(x, null));
}
/// <summary>
/// Get the terminals located at x.
/// </summary>
/// <param name="x"></param>
/// <returns></returns>
public IEnumerable <Terminal> TerminalsAt(Coord x)
{
return(elements.SelectMany(i => i.Terminals.Where(j => i.MapTerminal(j) == x)));
}