增加查询不同的状态的穴位时采用反向查找

Rs.Controls/RsTray.cs

@@ -98,16 +98,30 @@ namespace Rs.Controls
             set { _InitSlotStatus = value; InitSlot(InitSlotStatus); Invalidate(); }
         }
 
-        public TraySlot GetSlot(ESlotStatus status)
+        public TraySlot GetSlot(ESlotStatus status,bool reverse=false)
+        {
+            if(reverse)
+            {
+                for (int row = 0; row < RowNum; row++)
+                {
+                    for (int col = ColumnNum; col > 0; col--)
+                    {
+                        int index = row * (ColumnNum) + col;
+                        if (traySlotsDic[index].SlotStatus == status)
+                            return traySlotsDic[index];
+                    }
+                }
+            }
+            else
             {
                 foreach (KeyValuePair<int, TraySlot> kv in traySlotsDic)
                 {
                     if (kv.Value.SlotStatus == status)
                         return kv.Value;
                 }
+            }
             return null;
         }
-
         /// <summary>
         /// 通过穴位的索引获取穴位
         /// </summary>