0.2版本，重构代码，增加Editor

Scripts/Editor/PropertyDrawers/TooltipDrawer.cs

@@ -0,0 +1,26 @@
+using UnityEditor;
+using UnityEngine;
+using UnityEngine.UI;
+
+namespace XCharts
+{
+    [CustomPropertyDrawer(typeof(Tooltip), true)]
+    public class TooltipDrawer : PropertyDrawer
+    {
+        private bool m_TooltipModuleToggle = false;
+
+        public override void OnGUI(Rect pos, SerializedProperty prop, GUIContent label)
+        {
+            Rect drawRect = pos;
+            drawRect.height = EditorGUIUtility.singleLineHeight;
+            SerializedProperty show = prop.FindPropertyRelative("m_Show");
+
+            ChartEditorHelper.MakeFoldout(ref drawRect, ref m_TooltipModuleToggle, "Tooltip", show);
+        }
+
+        public override float GetPropertyHeight(SerializedProperty prop, GUIContent label)
+        {
+            return 1 * (EditorGUIUtility.singleLineHeight + EditorGUIUtility.standardVerticalSpacing);
+        }
+    }
+}