增加Pie的LabelLine支持Symbol

Runtime/Serie/Pie/PieHandler.cs

@@ -516,6 +516,7 @@ namespace XCharts.Runtime
                             break;
                     }
                 }
+                DrawLabelLineSymbol(vh, labelLine, pos1, pos5, color);
             }
         }
 

Runtime/Serie/Ring/RingHandler.cs

@@ -407,22 +407,8 @@ namespace XCharts.Runtime
                         UGL.DrawLine(vh, pos1, pos5, labelLine.lineWidth, color);
                         break;
                 }
-                if (labelLine.startSymbol != null && labelLine.startSymbol.show)
+                DrawLabelLineSymbol(vh, labelLine, pos1, pos5, color);
-                {
-                    DrawSymbol(vh, labelLine.startSymbol, pos1, color);
-                }
-                if (labelLine.endSymbol != null && labelLine.endSymbol.show)
-                {
-                    DrawSymbol(vh, labelLine.endSymbol, pos5, color);
-                }
             }
         }
-
-        private void DrawSymbol(VertexHelper vh, SymbolStyle symbol, Vector3 pos, Color32 defaultColor)
-        {
-            var color = symbol.GetColor(defaultColor);
-            chart.DrawSymbol(vh, symbol.type, symbol.size, 1, pos,
-                color, color, ColorUtil.clearColor32, color, symbol.gap, null);
-        }
     }
 }

Runtime/Serie/SerieHandler.cs

@@ -593,5 +593,24 @@ namespace XCharts.Runtime
 
             paramList.Add(param);
         }
+
+        public void DrawLabelLineSymbol(VertexHelper vh, LabelLine labelLine, Vector3 startPos, Vector3 endPos, Color32 defaultColor)
+        {
+            if (labelLine.startSymbol != null && labelLine.startSymbol.show)
+            {
+                DrawSymbol(vh, labelLine.startSymbol, startPos, defaultColor);
+            }
+            if (labelLine.endSymbol != null && labelLine.endSymbol.show)
+            {
+                DrawSymbol(vh, labelLine.endSymbol, endPos, defaultColor);
+            }
+        }
+
+        private void DrawSymbol(VertexHelper vh, SymbolStyle symbol, Vector3 pos, Color32 defaultColor)
+        {
+            var color = symbol.GetColor(defaultColor);
+            chart.DrawSymbol(vh, symbol.type, symbol.size, 1, pos,
+                color, color, ColorUtil.clearColor32, color, symbol.gap, null);
+        }
     }
 }