增加代码API注释文档，整理代码

Scripts/UI/Component/Title.cs

@@ -0,0 +1,148 @@
+using UnityEngine;
+using System;
+
+namespace XCharts
+{
+    /// <summary>
+    /// Title component, including main title and subtitle.
+    /// 标题组件，包含主标题和副标题。
+    /// </summary>
+    [Serializable]
+    public class Title : IPropertyChanged, IEquatable<Title>
+    {
+        [SerializeField] private bool m_Show = true;
+        [SerializeField] private string m_Text;
+        [SerializeField] private int m_TextFontSize;
+        [SerializeField] private string m_SubText;
+        [SerializeField] private int m_SubTextFontSize;
+        [SerializeField] private float m_ItemGap;
+        [SerializeField] private Location m_Location;
+
+        /// <summary>
+        /// [default:true]
+        /// Set this to false to prevent the title from showing.
+        /// 是否显示标题组件。
+        /// </summary>
+        public bool show { get { return m_Show; } set { m_Show = value; } }
+        /// <summary>
+        /// The main title text, supporting for \n for newlines.
+        /// 主标题文本，支持使用 \n 换行。
+        /// </summary>
+        public string text { get { return m_Text; } set { m_Text = value; } }
+        /// <summary>
+        /// [default:16]
+        /// main title font size.
+        /// 主标题文字的字体大小。
+        /// </summary>
+        public int textFontSize { get { return m_TextFontSize; } set { m_TextFontSize = value; } }
+        /// <summary>
+        /// Subtitle text, supporting for \n for newlines.
+        /// 副标题文本，支持使用 \n 换行。
+        /// </summary>
+        public string subText { get { return m_SubText; } set { m_Text = value; } }
+        /// <summary>
+        /// [default:14]
+        /// subtitle font size.
+        /// 副标题文字的字体大小。
+        /// </summary>
+        public int subTextFontSize { get { return m_SubTextFontSize; } set { m_SubTextFontSize = value; } }
+        /// <summary>
+        /// [default:14]
+        /// The gap between the main title and subtitle.
+        /// 主副标题之间的间距。
+        /// </summary>
+        public float itemGap { get { return m_ItemGap; } set { m_ItemGap = value; } }
+        /// <summary>
+        /// The location of title component.
+        /// 标题显示位置。
+        /// </summary>
+        public Location location { get { return m_Location; } set { m_Location = value; } }
+
+        public static Title defaultTitle
+        {
+            get
+            {
+                var title = new Title
+                {
+                    m_Show = true,
+                    m_Text = "Chart Title",
+                    m_TextFontSize = 16,
+                    m_SubText = "",
+                    m_SubTextFontSize = 14,
+                    m_ItemGap = 14,
+                    m_Location = Location.defaultTop
+                };
+                return title;
+            }
+        }
+        public void Copy(Title title)
+        {
+            m_Show = title.show;
+            m_Text = title.text;
+            m_TextFontSize = title.textFontSize;
+            m_SubText = title.subText;
+            m_SubTextFontSize = title.subTextFontSize;
+            m_ItemGap = title.itemGap;
+            m_Location.Copy(title.location);
+        }
+
+        public override bool Equals(object obj)
+        {
+            if (ReferenceEquals(null, obj))
+            {
+                return false;
+            }
+            else if (obj is Title)
+            {
+                return Equals((Title)obj);
+            }
+            else
+            {
+                return false;
+            }
+        }
+
+        public bool Equals(Title other)
+        {
+            if (ReferenceEquals(null, other))
+            {
+                return false;
+            }
+            return m_Show == other.show &&
+                m_Text.Equals(other.text) &&
+                m_TextFontSize == other.textFontSize &&
+                m_SubText.Equals(other.subText) &&
+                m_SubTextFontSize == other.subTextFontSize &&
+                m_ItemGap == other.itemGap &&
+                m_Location.Equals(other.location);
+        }
+
+        public static bool operator ==(Title left, Title right)
+        {
+            if (ReferenceEquals(left, null) && ReferenceEquals(right, null))
+            {
+                return true;
+            }
+            else if (ReferenceEquals(left, null) || ReferenceEquals(right, null))
+            {
+                return false;
+            }
+            return Equals(left, right);
+        }
+
+        public static bool operator !=(Title left, Title right)
+        {
+            return !(left == right);
+        }
+
+        public override int GetHashCode()
+        {
+            return base.GetHashCode();
+        }
+
+        public void OnChanged()
+        {
+            m_Location.OnChanged();
+        }
+    }
+}