public static void DrawEuler(GraphVisual graph, Canvas canvas)
{
Point[] vertPositions = graph.vertPositions;
// Draws indexes in and Euler cycle
var eulerIdxArray = graph.FindEulerPath();
if (graph.IsEuler())
{
for (int i = 0; i < eulerIdxArray.Count - 1; i++)
{
Label labelEuler = new Label
{
#if _ONE_NUMBERING
Content = i + 1,
#else
Content = i,
#endif
Foreground = Brushes.Red
};
int nextIdx = i + 1 < eulerIdxArray.Count ? i + 1 : 0;
double posX = (vertPositions[eulerIdxArray[i]].X + vertPositions[eulerIdxArray[nextIdx]].X) / 2;
double posY = (vertPositions[eulerIdxArray[i]].Y + vertPositions[eulerIdxArray[nextIdx]].Y) / 2;
Canvas.SetLeft(labelEuler, posX * canvas.ActualWidth - 12);
Canvas.SetTop(labelEuler, posY * canvas.ActualHeight - 12);
canvas.Children.Add(labelEuler);
}
}
}
public MainViewModel()
{
GenerateGraphCommand = new RelayCommand(
delegate
{
EulerPathString = "";
if (UInt32.TryParse(VertCount, out uint vertCount))
{
graph = new GraphVisual(vertCount, (float)EdgeChance, (10, 10), 50);
}
NMatrix = graph.NMatrix;
DrawGraph();
SetGraphStateMessage();
if (graph.IsEuler())
{
SetEulerPathString();
}
},