Tree view drawing problem

gwithey

Hi i am trying to write a tree view control however have come accross difficulty in drawing the vertical lines. The bellow method currently works by fining the cumulative height of the last branch it was in and then calls AmountToDeduct(nodes[i].Nodes) to reduce this to the correct height for the next line. However this is very slow. Does anyone know a way i can simply not add nodeheight to the newLineFinishPoint if it is not needed apposed to taking away from the total heigh.

private Point PositionNodes(List<Node> nodes, Point point)
{
// Create new start point for downwards line
Point newStartPoint = new Point();
Point newFinishPoint = new Point();
newStartPoint = point;

     int nodeHeight = nodes\[0\].Size.Height;

     // Loop nodes
     for(int i = 0; i &lt; nodes.Count; i++)
     {
        // Set node location and draw
        nodes\[i\].Location = point;

        // Increase Y by one line
        point.Y += nodeHeight;

        // If node has child nodes
        if (nodes\[i\].Nodes.Count &gt; 0 &amp;&amp; nodes\[i\].Expanded)
        {
           // Call method again on child nodes
           point.Y = PositionNodes(nodes\[i\].Nodes, new Point(point.X + m\_xIndentation, point.Y)).Y;
        }

        // Set finishing point of line
        newFinishPoint = point;
        newFinishPoint.Y -= (int)(nodes\[0\].Size.Height \* 0.5);

        // If node has only one child and is expanded reduce line by this amount
        if (nodes.Count == 1 &amp;&amp; nodes\[i\].Expanded)
        {
           // Reduce line by child nodes amount
           newFinishPoint.Y -= AmountToDeduct(nodes\[i\].Nodes);
        }

        // Add points to list
        m\_linePoints.Add(newStartPoint);
        m\_linePoints.Add(newFinishPoint);
     }

     // Cumulative height of nodes
     return point;
  }

Thanks in advance