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DoEasy 函数库中的图形（第八十四部分）：抽象标准图形对象的衍生后代类·进阶篇

（2/3）·抽象基类只是壳，真正决定图形对象能暴露什么属性的，是衍生后代类的组归属设计

偏理论进阶第 2/3 篇

不少人把抽象图形对象当成万能容器，往里塞所有终端属性，结果调用时根本分不清哪些是该对象真正支持的。理清衍生类的组归属，才能知道哪些属性该开放、哪些该屏蔽。

本章目录

图形对象排序枚举到底覆盖了哪些维度
图形对象排序枚举的后半段细节
图形对象排序枚举与消息索引的底层定义
库内属性与对象消息枚举的暗坑
对象属性分组与多语消息表的硬编码结构
图形对象按周期显示的判定逻辑

◍ 图形对象排序枚举到底覆盖了哪些维度

在 MT5 的 ObjectsTotal / ObjectGetInteger 体系里，图形对象并不是无序堆在图表上的。系统提供了一组 SORT_BY_GRAPH_OBJ_* 枚举，用来决定你用 ObjectsTotal(0, 0, sort_type) 取对象列表时，底层按什么字段排。这组枚举从归属关系一直细到视觉属性：SORT_BY_GRAPH_OBJ_GROUP 按对象组排，SORT_BY_GRAPH_OBJ_BELONG 按所属元素排，SORT_BY_GRAPH_OBJ_CHART_ID 按图表 ID 排，SORT_BY_GRAPH_OBJ_WND_NUM 按子窗口序号排。时间类维度有 SORT_BY_GRAPH_OBJ_CREATETIME（创建时间）和 SORT_BY_GRAPH_OBJ_TIME（时间坐标），交互类则有 SORT_BY_GRAPH_OBJ_ZORDER（点击接收优先级）、SORT_BY_GRAPH_OBJ_SELECTED（是否被选中）、SORT_BY_GRAPH_OBJ_SELECTABLE（是否可选中）。纯外观维度也全给了出口：COLOR / STYLE / WIDTH / FILL / LEVELCOLOR / LEVELSTYLE，分别对应颜色、线型、线宽、填充、水平线颜色和水平线型。写 EA 批量清理对象或遍历画线时，选错排序类型可能让你漏掉后台对象，开 MT5 按 F4 把下面枚举贴进调试脚本就能验证排序差异。

MQL5 / C++

SORT_BY_GRAPH_OBJ_GROUP,                                                                     class=class="str">"cmt">// Sort by a graphical object group
 SORT_BY_GRAPH_OBJ_BELONG,                                                                      class=class="str">"cmt">//  Sort by a graphical element affiliation
 SORT_BY_GRAPH_OBJ_CHART_ID,                                                                    class=class="str">"cmt">// Sort by chart ID
 SORT_BY_GRAPH_OBJ_WND_NUM,                                                                     class=class="str">"cmt">// Sort by chart subwindow index
 SORT_BY_GRAPH_OBJ_NUM,                                                                         class=class="str">"cmt">// Sort by object index in the list
 SORT_BY_GRAPH_OBJ_CREATETIME,                                                                  class=class="str">"cmt">// Sort by object creation time
 SORT_BY_GRAPH_OBJ_TIMEFRAMES,                                                                  class=class="str">"cmt">// Sort by object visibility on timeframes
 SORT_BY_GRAPH_OBJ_BACK,                                                                        class=class="str">"cmt">// Sort by the "Background object" class="kw">property
 SORT_BY_GRAPH_OBJ_ZORDER,                                                                      class=class="str">"cmt">// Sort by the priority of a graphical object for receiving the event of clicking on a chart
 SORT_BY_GRAPH_OBJ_HIDDEN,                                                                      class=class="str">"cmt">// Sort by a disabling display of the name of a graphical object in the terminal object list
 SORT_BY_GRAPH_OBJ_SELECTED,                                                                    class=class="str">"cmt">// Sort by the "Object selection" class="kw">property
 SORT_BY_GRAPH_OBJ_SELECTABLE,                                                                  class=class="str">"cmt">// Sort by the "Object availability" class="kw">property
 SORT_BY_GRAPH_OBJ_TIME,                                                                        class=class="str">"cmt">// Sort by time coordinate
 SORT_BY_GRAPH_OBJ_COLOR,                                                                       class=class="str">"cmt">// Sort by class="type">color
 SORT_BY_GRAPH_OBJ_STYLE,                                                                       class=class="str">"cmt">// Sort by style
 SORT_BY_GRAPH_OBJ_WIDTH,                                                                       class=class="str">"cmt">// Sort by line width
 SORT_BY_GRAPH_OBJ_FILL,                                                                        class=class="str">"cmt">// Sort by the "Object class="type">color filling" class="kw">property
 SORT_BY_GRAPH_OBJ_READONLY,                                                                    class=class="str">"cmt">// Sort by the ability to edit text in the Edit object
 SORT_BY_GRAPH_OBJ_LEVELS,                                                                      class=class="str">"cmt">// Sort by number of levels
 SORT_BY_GRAPH_OBJ_LEVELCOLOR,                                                                  class=class="str">"cmt">// Sort by line level class="type">color
 SORT_BY_GRAPH_OBJ_LEVELSTYLE                                                                   class=class="str">"cmt">// Sort by line level style

图形对象排序枚举的后半段细节

在 MT5 的 ObjectsTotal / ObjectGetString 系列调用里，排序图形对象用的 ENUM_SORT_MODE 并不只有前几个常见项，后半段这组枚举专门覆盖画线宽度、对齐、字体以及各类对象专属属性。下面这段枚举定义列出了从 SORT_BY_GRAPH_OBJ_LEVELWIDTH 到 SORT_BY_GRAPH_OBJ_YSIZE 共 23 个常量，每一个都对应一种图形对象的子属性排序依据，例如射线向左 / 向右、椭圆显示模式、箭头代码、锚点位置、像素级 X/Y 偏移等。实盘写 EA 或指标时若要对图表上的斐波那契弧、江恩线、艾略特波浪标记做批量遍历并按特定属性归类，直接套这些枚举会比自己写字符串比较更稳。外汇与贵金属杠杆高，这类对象遍历逻辑若用在自动平仓或信号判定上，回测与实盘偏差可能放大，需自行验证。别把正态当圣经：枚举名里的 LEVELWIDTH、RAY_LEFT 等和对象类型强绑定，用错对象类型去取属性会返回空或 0，调试时先 ObjectGetInteger 探一下再排序。

MQL5 / C++

  SORT_BY_GRAPH_OBJ_LEVELWIDTH,                                                                     class=class="str">"cmt">// Sort by line level width
  SORT_BY_GRAPH_OBJ_ALIGN,                                                                           class=class="str">"cmt">// Sort by the "Horizontal text alignment in the Entry field" class="kw">property
  SORT_BY_GRAPH_OBJ_FONTSIZE,                                                                        class=class="str">"cmt">// Sort by font size
  SORT_BY_GRAPH_OBJ_RAY_LEFT,                                                                        class=class="str">"cmt">// Sort by "Ray goes to the left" class="kw">property
  SORT_BY_GRAPH_OBJ_RAY_RIGHT,                                                                       class=class="str">"cmt">// Sort by "Ray goes to the right" class="kw">property
  SORT_BY_GRAPH_OBJ_RAY,                                                                             class=class="str">"cmt">// Sort by the "Vertical line goes through all windows of a chart" class="kw">property
  SORT_BY_GRAPH_OBJ_ELLIPSE,                                                                         class=class="str">"cmt">// Sort by the "Display the full ellipse of the Fibonacci Arc object" class="kw">property
  SORT_BY_GRAPH_OBJ_ARROWCODE,                                                                       class=class="str">"cmt">// Sort by an arrow code for the Arrow object
  SORT_BY_GRAPH_OBJ_ANCHOR,                                                                          class=class="str">"cmt">// Sort by the position of a binding point of a graphical object
  SORT_BY_GRAPH_OBJ_XDISTANCE,                                                                       class=class="str">"cmt">// Sort by a distance from the base corner along the X axis in pixels
  SORT_BY_GRAPH_OBJ_YDISTANCE,                                                                       class=class="str">"cmt">// Sort by a distance from the base corner along the Y axis in pixels
  SORT_BY_GRAPH_OBJ_DIRECTION,                                                                       class=class="str">"cmt">// Sort by the "Gann object trend" class="kw">property
  SORT_BY_GRAPH_OBJ_DEGREE,                                                                          class=class="str">"cmt">// Sort by the "Elliott wave marking level" class="kw">property
  SORT_BY_GRAPH_OBJ_DRAWLINES,                                                                       class=class="str">"cmt">// Sort by the "Display lines for Elliott wave marking" class="kw">property
  SORT_BY_GRAPH_OBJ_STATE,                                                                           class=class="str">"cmt">// Sort by button state(pressed/released)
  SORT_BY_GRAPH_OBJ_OBJ_CHART_ID,                                                                    class=class="str">"cmt">// Sort by Chart object ID.
  SORT_BY_GRAPH_OBJ_CHART_OBJ_PERIOD,                                                                class=class="str">"cmt">// Sort by Chart object period
  SORT_BY_GRAPH_OBJ_CHART_OBJ_DATE_SCALE,                                                            class=class="str">"cmt">// Sort by time scale display flag for the Chart object
  SORT_BY_GRAPH_OBJ_CHART_OBJ_PRICE_SCALE,                                                           class=class="str">"cmt">// Sort by price scale display flag for the Chart object
  SORT_BY_GRAPH_OBJ_CHART_OBJ_CHART_SCALE,                                                           class=class="str">"cmt">// Sort by Chart object scale
  SORT_BY_GRAPH_OBJ_XSIZE,                                                                           class=class="str">"cmt">// Sort by Object width along the X axis in pixels
  SORT_BY_GRAPH_OBJ_YSIZE                                                                           class=class="str">"cmt">// Sort by object height along the Y axis in pixels

「图形对象排序枚举与消息索引的底层定义」

在 MT5 自定义库里，图形对象的可排序属性被拆成了整型、双精度、字符串三类枚举。整型段从 X/Y 偏移量、背景色、绑定角到边框类型与颜色，覆盖了 OBJ_EDIT、OBJ_BUTTON、OBJ_RECTANGLE_LABEL 等控件的界面级特征。双精度段以 FIRST_GRAPH_OBJ_DBL_PROP 为起点，包含价格坐标、水平值、江恩与斐波那契弧的缩放、角度以及标准差通道的偏离值——这些是会影响对象在图表上几何位置的实际数值属性。字符串段从 FIRST_GRAPH_OBJ_STR_PROP 开始，按名称、描述、提示文本、水平文本、字体、BMP 文件名和 Chart 对象品种逐一枚举，方便在对象管理器里做字典序排列。消息索引枚举 ENUM_MESSAGES_LIB 把 MSG_LIB_PARAMS_LIST_BEG 绑定到 ERR_USER_ERROR_FIRST，再紧接 MSG_LIB_PARAMS_LIST_END，等于给用户错误区间留出了参数列表起止的两个锚点。开 MT5 把这段枚举贴进头文件，编译后可在对象遍历函数里直接传 SORT_BY_GRAPH_OBJ_PRICE 验证排序行为。

MQL5 / C++

  SORT_BY_GRAPH_OBJ_XOFFSET,                                                                       class=class="str">"cmt">// Sort by X coordinate of the upper-left corner of the visibility area
  SORT_BY_GRAPH_OBJ_YOFFSET,                                                                       class=class="str">"cmt">// Sort by Y coordinate of the upper-left corner of the visibility area
  SORT_BY_GRAPH_OBJ_BGCOLOR,                                                                       class=class="str">"cmt">// Sort by background class="type">color for OBJ_EDIT, OBJ_BUTTON and OBJ_RECTANGLE_LABEL
  SORT_BY_GRAPH_OBJ_CORNER,                                                                        class=class="str">"cmt">// Sort by chart corner for binding a graphical object
  SORT_BY_GRAPH_OBJ_BORDER_TYPE,                                                                   class=class="str">"cmt">// Sort by border type for the "Rectangle border" object
  SORT_BY_GRAPH_OBJ_BORDER_COLOR,                                                                  class=class="str">"cmt">// Sort by frame class="type">color for the OBJ_EDIT and OBJ_BUTTON objects
class=class="str">"cmt">//--- Sort by real properties
  SORT_BY_GRAPH_OBJ_PRICE = FIRST_GRAPH_OBJ_DBL_PROP,   class=class="str">"cmt">// Sort by price coordinate
  SORT_BY_GRAPH_OBJ_LEVELVALUE,                                                                     class=class="str">"cmt">// Sort by level value
  SORT_BY_GRAPH_OBJ_SCALE,                                                                          class=class="str">"cmt">// Sort by scale(class="kw">property of Gann objects and Fibonacci Arcs objects)
  SORT_BY_GRAPH_OBJ_ANGLE,                                                                          class=class="str">"cmt">// Sort by angle
  SORT_BY_GRAPH_OBJ_DEVIATION,                                                                      class=class="str">"cmt">// Sort by a deviation of the standard deviation channel
class=class="str">"cmt">//--- Sort by class="type">class="kw">string properties
  SORT_BY_GRAPH_OBJ_NAME = FIRST_GRAPH_OBJ_STR_PROP,                                                 class=class="str">"cmt">// Sort by object name
  SORT_BY_GRAPH_OBJ_TEXT,                                                                           class=class="str">"cmt">// Sort by object description
  SORT_BY_GRAPH_OBJ_TOOLTIP,                                                                        class=class="str">"cmt">// Sort by tooltip text
  SORT_BY_GRAPH_OBJ_LEVELTEXT,                                                                      class=class="str">"cmt">// Sort by level description
  SORT_BY_GRAPH_OBJ_FONT,                                                                           class=class="str">"cmt">// Sort by font
  SORT_BY_GRAPH_OBJ_BMPFILE,                                                                        class=class="str">"cmt">// Sort by BMP file name for the "Bitmap Level" object
  SORT_BY_GRAPH_OBJ_CHART_OBJ_SYMBOL,                                                               class=class="str">"cmt">// Sort by Chart object period symbol
  };
class=class="str">"cmt">//+------------------------------------------------------------------+
class=class="str">"cmt">//+------------------------------------------------------------------+
class=class="str">"cmt">//| List of the library&class="macro">#x27;s text message indices                                                       |
class=class="str">"cmt">//+------------------------------------------------------------------+
enum ENUM_MESSAGES_LIB
  {
  MSG_LIB_PARAMS_LIST_BEG=ERR_USER_ERROR_FIRST,                                                     class=class="str">"cmt">// Beginning of the parameter list
  MSG_LIB_PARAMS_LIST_END,                                                                          class=class="str">"cmt">// End of the parameter list

◍ 库内属性与对象消息枚举的暗坑

在 MT5 标准库的消息枚举里，有一批 MSG_LIB_PROP_* 常量专门描述属性读取失败的原因。比如 MSG_LIB_PROP_NOT_SUPPORTED_MT5_LESS_2155 明确指出：某些属性在 MetaTrader 5 低于 build 2155 的版本里直接不可用，老终端跑新库代码会静默返回错误。 MSG_LIB_PROP_NOT_SUPPORTED_POSITION 与 MSG_LIB_PROP_NOT_SUPPORTED_PENDING 的区分很实在：持仓对象和挂单对象支持的特性集合不同，用同一套属性接口去读就会触发不同的不支持消息。写 EA 时若不分对象类型统一调属性，日志里就会交替冒出这两条。图形对象相关的枚举也值得盯一眼。MSG_LIB_TEXT_OBJ_NO_PERIODS 表示对象不在任何周期显示，MSG_LIB_TEXT_OBJ_ALL_PERIODS 则是全周期绘制；MSG_GRAPH_STD_OBJ_ANY 作为抽象图形对象基类标识，跟 VLINE / HLINE 这类具体类型并列定义。下面这段枚举摘出来，黄色高亮的三条是容易在调试时漏看的关键消息：

MQL5 / C++

  MSG_LIB_PROP_NOT_SUPPORTED,                                          class=class="str">"cmt">// Property not supported
  MSG_LIB_PROP_NOT_SUPPORTED_MQL4,                                      class=class="str">"cmt">// Property not supported in MQL4
  MSG_LIB_PROP_NOT_SUPPORTED_MT5_LESS_2155,                             class=class="str">"cmt">// Property not supported in MetaTrader class="num">5 versions lower than class="num">2155
  MSG_LIB_PROP_NOT_SUPPORTED_POSITION,                                  class=class="str">"cmt">// Property not supported for position
  MSG_LIB_PROP_NOT_SUPPORTED_PENDING,                                   class=class="str">"cmt">// Property not supported for pending order
  MSG_LIB_PROP_NOT_SUPPORTED_MARKET,                                    class=class="str">"cmt">// Property not supported for market order
  MSG_LIB_PROP_NOT_SUPPORTED_MARKET_HIST,                               class=class="str">"cmt">// Property not supported for historical market order
  MSG_LIB_PROP_NOT_SET,                                                 class=class="str">"cmt">// Value not set
  MSG_LIB_PROP_EMPTY,                                                   class=class="str">"cmt">// Not set
  MSG_LIB_PROP_AUTO,                                                    class=class="str">"cmt">// Formed by the terminal
  MSG_LIB_PROP_AS_IN_ORDER,                                             class=class="str">"cmt">// According to the order expiration mode
  MSG_LIB_TEXT_FAILED_ADD_TO_LIST,                                      class=class="str">"cmt">// failed to add to list
  MSG_LIB_TEXT_TIME_UNTIL_THE_END_DAY,                                  class=class="str">"cmt">// Order lifetime till the end of the current day to be used
  MSG_LIB_TEXT_OBJ_NO_PERIODS,                                          class=class="str">"cmt">// Not shown on any timeframe
  MSG_LIB_TEXT_OBJ_ALL_PERIODS,                                         class=class="str">"cmt">// Drawn on all timeframes
  MSG_LIB_TEXT_JANUARY,                                                 class=class="str">"cmt">// January
  MSG_LIB_TEXT_FEBRUARY,                                                class=class="str">"cmt">// February
  MSG_GRAPH_OBJ_BELONG_PROGRAM,                                         class=class="str">"cmt">// Graphical object belongs to a program
  MSG_GRAPH_OBJ_BELONG_NO_PROGRAM,                                      class=class="str">"cmt">// Graphical object does not belong to a program
class=class="str">"cmt">//---
  MSG_GRAPH_STD_OBJ_ANY,                                                class=class="str">"cmt">// Abstract graphical object
  MSG_GRAPH_STD_OBJ_VLINE,                                              class=class="str">"cmt">// Vertical line
  MSG_GRAPH_STD_OBJ_HLINE,                                              class=class="str">"cmt">// Horizontal line
  MSG_GRAPH_OBJ_PROP_BMPFILE,                                           class=class="str">"cmt">// BMP file name for the "Bitmap Level" object
  MSG_GRAPH_OBJ_PROP_SYMBOL,                                            class=class="str">"cmt">// Chart object symbol

对象属性分组与多语消息表的硬编码结构

在 MT5 的指标或 EA 源码里，图形对象属性面板的分组标签往往不是运行时拼出来的，而是直接写进枚举常量。下面这组常量把对象属性对话框的左侧树形菜单定死了：从 Lines、Channels 到 Gann、Fibo、Elliott，再到 Shapes、Arrows、Graphical objects，一共 9 个一级分组，终端据此渲染 UI。 MSG_GRAPH_OBJ_PROP_GROUP_LINES 对应「趋势线类」面板，MSG_GRAPH_OBJ_PROP_GROUP_FIBO 对应回撤工具集；如果你自己做 ObjectCreate 的辅助面板，直接复用这组 ID 能保证和原生右键菜单一致，避免交易者找不到开关。多语言支持则是另一张二维表 messages_library[][TOTAL_LANG]，每一行同时存俄文与英文。注意其中一条硬约束：'The property is not supported in MetaTrader5, build lower than 2155'——也就是说，部分对象属性在 2155 以下 build 的终端直接不可用，开 MT5 按 F1 查 build 号就能验证。 'Drawn on all timeframes' 与 'Not shown on any timeframe' 这两条消息也藏在表里，它们控制对象跨周期可见性描述；改 EA 的 OBJ_FIBO 显示逻辑时，若想自定义提示文案，得先覆盖这两行索引，否则终端仍吐原句。

MQL5 / C++

MSG_GRAPH_OBJ_PROP_GROUP,                                                                       class=class="str">"cmt">// Graphical object group
MSG_GRAPH_OBJ_PROP_GROUP_LINES,                                                                     class=class="str">"cmt">// Lines
MSG_GRAPH_OBJ_PROP_GROUP_CHANNELS,                                                                   class=class="str">"cmt">// Channels
MSG_GRAPH_OBJ_PROP_GROUP_GANN,                                                                       class=class="str">"cmt">// Gann
MSG_GRAPH_OBJ_PROP_GROUP_FIBO,                                                                       class=class="str">"cmt">// Fibo
MSG_GRAPH_OBJ_PROP_GROUP_ELLIOTT,                                                                    class=class="str">"cmt">// Elliott
MSG_GRAPH_OBJ_PROP_GROUP_SHAPES,                                                                     class=class="str">"cmt">// Shapes
MSG_GRAPH_OBJ_PROP_GROUP_ARROWS,                                                                     class=class="str">"cmt">// Arrows
MSG_GRAPH_OBJ_PROP_GROUP_GRAPHICAL,                                                                  class=class="str">"cmt">// Graphical objects

MSG_GRAPH_OBJ_TEXT_CLICK_COORD,                                                                      class=class="str">"cmt">// (Chart click coordinate)

};
class=class="str">"cmt">//+------------------------------------------------------------------+
class="type">class="kw">string messages_library[][TOTAL_LANG]=
  {
   {"Начало списка параметров","The beginning of the parameter list"},
   {"Конец списка параметров","End of parameter list"},
   {"Свойство не поддерживается","Property not supported"},
   {"Свойство не поддерживается в MQL4","Property not supported in MQL4"},
   {"Свойство не поддерживается в MetaTrader5 версии ниже class="num">2155","The class="kw">property is not supported in MetaTrader5, build lower than class="num">2155"},
   {"Свойство не поддерживается у позиции","Property not supported for position"},
   {"Свойство не поддерживается у отложенного ордера","The class="kw">property is not supported for a pending order"},
   {"Свойство не поддерживается у маркет-ордера","The class="kw">property is not supported for a market-order"},
   {"Свойство не поддерживается у исторического маркет-ордера","The class="kw">property is not supported for a history market-order"},
   {"Значение не задано","Value not set"},
   {"Отсутствует","Not set"},
   {"Формируется терминалом","Formed by the terminal"},
   {"В соответствии с режимом истечения ордера","In accordance with the order expiration mode"},
   {"не удалось добавить в список","failed to add to list"},
   {"Будет использоваться время действия ордера до конца текущего дня","Order validity time until the end of the current day will be used"},
   {"Не показывается ни на одном таймфрейме","Not shown on any timeframe"},
   {"Рисуется на всех таймфреймах","Drawn on all timeframes"},
   {"Январь","January"},
   {"Февраль","February"},
   {"Графический объект принадлежит программе","The graphic object belongs to the program"},
   {"Графический объект не принадлежит программе","The graphic object does not belong to the program"},

   {"Абстрактный графический объект","Abstract graphic object"},
   {"Вертикальная линия","Vertical Line"},
   {"Горизонтальная линия","Horizontal Line"},
  };

「图形对象按周期显示的判定逻辑」

在 MT5 里给图表对象做多语言标签时，除了基础的 BMP 文件名、图表品种名，还要覆盖图形对象分组：线、通道、甘氏、斐波那契、艾略特、形状、箭头等，共 10 类对象组加一个图表点击坐标字段。判定某个图形对象在指定周期是否可见，核心看 flags 位标记。若 flags 等于 OBJ_ALL_PERIODS 直接返回 true，等于 OBJ_NO_PERIODS 返回 false；否则按 timeframe 转成对应十六进制位做按位与。 M1 到 M15 的位值从 0x00000001 起每档左移一位：M1=0x1、M2=0x2、M3=0x4、M4=0x8、M5=0x10、M6=0x20、M10=0x40、M12=0x80、M15=0x100。开 MT5 把这段 switch 补完，就能在 EA 里精确控制对象只在部分周期显示，外汇与贵金属波动剧烈，对象误显可能造成误读，需自行回测确认。

MQL5 / C++

class="type">bool IsVisibleOnTimeframe(class="kw">const ENUM_TIMEFRAMES timeframe,class="kw">const class="type">int flags)
  {
   if(flags==OBJ_ALL_PERIODS)
      class="kw">return true;
   if(flags==OBJ_NO_PERIODS)
      class="kw">return false;
   class="type">int flag=class="num">0;
   class="kw">switch((class="type">int)timeframe)
     {
      case PERIOD_M1     :  flag=0x00000001;  class="kw">break;
      case PERIOD_M2     :  flag=0x00000002;  class="kw">break;
      case PERIOD_M3     :  flag=0x00000004;  class="kw">break;
      case PERIOD_M4     :  flag=0x00000008;  class="kw">break;
      case PERIOD_M5     :  flag=0x00000010;  class="kw">break;
      case PERIOD_M6     :  flag=0x00000020;  class="kw">break;
      case PERIOD_M10   :  flag=0x00000040;  class="kw">break;
      case PERIOD_M12   :  flag=0x00000080;  class="kw">break;
      case PERIOD_M15   :  flag=0x00000100;  class="kw">break;

把对象组归属诊断交给小布

这些图形对象组归属与属性可见性的判断逻辑，小布盯盘的 AIGC 已内置，打开对应品种页即可看到对象类的结构提示，你专注策略层调用。

←

DoEasy 函数库中的图形（第八十四部分）：抽象标准图形对象的衍生后代类（基础篇）

→

DoEasy 函数库中的图形（第八十四部分）：抽象标准图形对象的衍生后代类·综合运用

常见问题

抽象类只描述所有图形对象共有的部分，特定对象不支持的属性若开放访问会造成误用，衍生后代类按组归属屏蔽非自身参数更合理。

它们的属性可用已有抽象类功能描述，而其余组需要额外读写能力，作者将开发分阶，本篇先覆盖这五类组。

该整数属性通过对象可见性标志组合定义或设置，可在不同时间帧控制图像显示，具体由服务函数描述标志集合。

可以，小布内置的 AIGC 结构提示会标注对象所属组及可见属性，省去手动翻库类定义的重复劳动。

当前类仅存首个锚点时间，完整多锚点需同类型属性数组并按修饰符索引，因篇幅所限留待后续阶段开发。

DoEasy 函数库中的图形（第八十四部分）：抽象标准图形对象的衍生后代类·进阶篇

◍ 图形对象排序枚举到底覆盖了哪些维度

图形对象排序枚举的后半段细节

「图形对象排序枚举与消息索引的底层定义」

◍ 库内属性与对象消息枚举的暗坑

对象属性分组与多语消息表的硬编码结构

「图形对象按周期显示的判定逻辑」

常见问题

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