public void DrawRelationship(IRenderer Renderer)
{
NodeRelationship rel = TreeView.Relationship;
if (rel == null)
{
return;
}
Control sender = ExtractCoreControl(rel.Sender);
List <Control> receivers = new List <Control>();
foreach (Block receiver in rel.Receivers)
{
receivers.Add(ExtractCoreControl(receiver));
}
List <int> Ys = new List <int>();
List <int> Xs = new List <int>();
Ys.Add(sender.Bounds.CenterY);
Xs.Add(sender.Bounds.Right);
foreach (Control c in receivers)
{
Ys.Add(c.Bounds.CenterY);
Xs.Add(c.Bounds.Right);
}
int yMin = 0;
int yMax = 0;
FindMinMaxY(Ys, out yMin, out yMax);
int x = FindMaxWidth() + ArrowRightMargin;
ILineStyleInfo style;
if (rel.Direction)
{
style = DefaultLineStyle;
}
else
{
style = DefaultReverseLineStyle;
}
IDrawOperations op = Renderer.DrawOperations;
op.DrawLine(x, yMin, x, yMax, style);
op.DrawLine(Xs[0] + 2, Ys[0], x, Ys[0], style);
for (int i = 1; i < Xs.Count; i++)
{
op.DrawLine(Xs[i] + 3, Ys[i], x, Ys[i], style);
if (rel.Direction)
{
DrawArrow(Renderer, Xs[i] + 2, Ys[i]);
}
else
{
op.DrawLine(Xs[i] + 3, Ys[i] - 4, Xs[i] + 3, Ys[i] + 4, style);
}
}
if (rel.Direction)
{
op.DrawLine(Xs[0] + 1, Ys[0] - 4, Xs[0] + 1, Ys[0] + 4, style);
}
else
{
DrawArrow(Renderer, Xs[0] + 2, Ys[0]);
}
}
protected virtual void InitDrawOperations()
{
mDrawOperations = new GDIDrawOperations(hDC);
}
