private Point RenderSubtree(PBTTaskTreeControl <DataType> ttc, int x, int y, float scale)
{
// add offset
if (ttc.Parent is GLGroupLayout)
{
x += ttc.Parent.X; y += ttc.Parent.Y;
}
x += ttc.X; y += ttc.Y;
// draw box
var tc = ttc.TaskControl;
Rectangle border = new Rectangle(
(int)((x + tc.X) * scale),
(int)((y + tc.Y) * scale),
(int)(tc.Width * scale),
(int)(tc.Height * scale));
Rectangle content = new Rectangle(border.X + 1, border.Y + 1, border.Width - 2, border.Height - 2);
var borderColor = tc.Skin.BorderColor;
var contentColor = tc.Skin.BackgroundColor;
GLDraw.FillRect(ref border, ref borderColor);
GLDraw.FillRect(ref content, ref contentColor);
//GLDraw.Text((GLFontText)typeof(GLLabel).GetField("textProcessed", BindingFlags.Instance | BindingFlags.NonPublic).GetValue(tc.title), ref content, ref textColor);
Point bottom = new Point(border.X, border.Y + border.Height);
float dx = border.Width / (float)(ttc.Subtrees.Count + 1);
// draw subtrees
for (int i = 0; i < ttc.Subtrees.Count; i++)
{
bottom.X = border.X + (int)(dx + i * dx);
lines.Add(new Tuple <Point, Point>(bottom, RenderSubtree(ttc.Subtrees[i], x, y, scale)));
}
return(new Point((int)(border.X + border.Width / 2.0), border.Y));
}