增加Pie的pieType支持实心饼图和线框柄图 (#349)

Documentation~/zh/changelog.md

@@ -80,6 +80,7 @@ slug: /changelog
 
 ## master
 
+* (2025.10.22) 增加`Pie`的`pieType`支持实心饼图和线框柄图 (#349)
 * (2025.09.05) 优化`MarkLine`的表现
 * (2025.09.01) 增加`AxisLine`的`startExtendLength`和`endExtendLength`设置轴线的延长线
 * (2025.08.27) 修复`Serie`的`TitleStyle`在数据变更时不及时刷新的问题

Editor/Series/PieEditor.cs

@@ -8,6 +8,7 @@ namespace XCharts.Editor
         public override void OnCustomInspectorGUI()
         {
             PropertyField("m_GridIndex");
+            PropertyField("m_PieType");
             PropertyField("m_RoseType");
             PropertyField("m_Gap");
             PropertyTwoFiled("m_Center");

Runtime/Serie/Pie/Pie.cs

@@ -2,6 +2,21 @@ using UnityEngine;
 
 namespace XCharts.Runtime
 {
+
+    public enum PieType
+    {
+        /// <summary>
+        /// solid pie chart - default fill style.
+        /// ||实心饼图 - 默认填充样式
+        /// </summary>
+        Solid,
+
+        /// <summary>
+        /// wireframe pie chart - only show the outline wireframe.
+        /// ||线框饼图 - 仅显示轮廓线框
+        /// </summary>
+        Wireframe
+    }
     [System.Serializable]
     [SerieConvert(typeof(Line), typeof(Bar))]
     [SerieHandler(typeof(PieHandler), true)]
@@ -12,10 +27,20 @@ namespace XCharts.Runtime
     public class Pie : Serie
     {
         [SerializeField][Since("v3.8.1")] private bool m_RadiusGradient = false;
+        [SerializeField][Since("v3.15.0")] private PieType m_PieType = PieType.Solid;
 
         public override SerieColorBy defaultColorBy { get { return SerieColorBy.Data; } }
         public override bool titleJustForSerie { get { return true; } }
 
+        /// <summary>
+        /// Pie chart type.
+        /// || 饼图类型。
+        /// </summary>
+        public PieType pieType
+        {
+            get { return m_PieType; }
+            set { if (PropertyUtil.SetStruct(ref m_PieType, value)) { SetVerticesDirty(); } }
+        }
         /// <summary>
         /// Whether to use gradient color in pie chart.
         /// || 是否开启半径方向的渐变效果。

Runtime/Serie/Pie/PieHandler.cs

@@ -381,8 +381,6 @@ namespace XCharts.Runtime
                 var needOffset = (serie.pieClickOffset && (serieData.selected || serieData.context.selected));
                 var offsetCenter = needOffset ? serieData.context.offsetCenter : serie.context.center;
 
-                var borderWidth = itemStyle.borderWidth;
-                var borderColor = itemStyle.borderColor;
 
                 var progress = AnimationStyleHelper.CheckDataAnimation(chart, serie, n, 1);
                 var insideRadius = serieData.context.insideRadius * progress;
@@ -398,6 +396,17 @@ namespace XCharts.Runtime
                         serieData.interact.SetPosition(ref interacting, offsetCenter);
                     }
                 }
+                var borderWidth = itemStyle.borderWidth;
+                var borderColor = itemStyle.GetBorderColor(color);
+                if (serie.pieType == PieType.Wireframe)
+                {
+                    color = ColorUtil.clearColor32;
+                    toColor = ColorUtil.clearColor32;
+                    if (borderWidth <= 0)
+                    {
+                        borderWidth = 4;
+                    }
+                }
                 var drawEndDegree = serieData.context.currentAngle;
                 var needRoundCap = serie.roundCap && insideRadius > 0;
                 UGL.DrawDoughnut(vh, offsetCenter, insideRadius,

Runtime/XUGL/UGL.cs

@@ -1446,7 +1446,7 @@ namespace XUGL
             var lastP4 = center;
             var lastColor = color;
             var needBorder = borderWidth != 0;
-            var needSpace = gap != 0;
+            var needSpace = gap != 0 || borderWidth != 0;
             var borderLineWidth = needSpace ? borderWidth : borderWidth / 2;
             var lastPos = Vector3.zero;
             var middleDire = UGLHelper.GetDire(startAngle + halfAngle);