protected void drawMap()
{
buffer.Clear(panel1.BackColor);
IPosition_Connected_Edit adj;
//先画节点间连接，再画节点，让节点覆盖在连接上，看起来比较清晰
foreach (IPosition_Connected_Edit p in map.GetPositionList())
{
IPositionSet_Connected_AdjacencyEdit adjSet = p.GetAdjacencyPositionSetEdit();
adjSet.InitToTraverseSet();
while (adjSet.NextPosition())
{
adj = adjSet.GetPosition_Connected_Edit();
drawConnection(linePen, p.GetX(), p.GetY(), adj.GetX(), adj.GetY());
}
}
foreach (IPosition_Connected_Edit p in map.GetPositionList())
{
drawNode(p.GetX(), p.GetY());
}
refreshTags();
}