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DoEasy. 控件（第三十部分）：动画态滚动条控件（基础篇）

第 1/3 篇

本章目录

给滚动条加上动画态捕捉区
从滚动条按钮到捕获区的对象派生
滚动条控件的库类改造细节
ScrollBar 配色与窗体热区常量
鼠标在自定义窗体各区域的状态枚举
枚举里的鼠标状态与事件收尾

◍ 给滚动条加上动画态捕捉区

这一节把库里的滚动条控件往前推了一步：原本只能静态响应的滑块，现在带上了动画态的捕获区域。捕获区负责接收鼠标命中，动画态意味着滑块在拖拽和悬停时有连续的位置插值，而不是瞬间跳变。具体落在滚动条控件捕获区域类里，类内部维护捕获矩形的坐标与当前动画进度，每帧根据鼠标偏移重算目标位置并做缓动。对交易者来说，这意味着你在 MT5 自定义面板里拖动量价刻度条时，手感更接近原生终端。原文示例发布于 2023 年 5 月 2 日，截至归档页面显示阅读量 795、评论 0，属于低讨论但已落地的中段教程。外汇与贵金属自定义面板开发属高风险环境，任何控件改动都应在模拟账户先验证。

「从滚动条按钮到捕获区的对象派生」

上一篇文章里滚动条（ScrollBar）辅助控件已经起了头，这一节要把控件元素和鼠标真正连起来。WinForms 风格的滚动条由两个部分组成：两端的箭头按钮，以及中间的捕获区域（thumb）。箭头按钮已有独立辅助类，捕获区域则准备用简单按钮派生出一个单独类来实现。关键点在于：捕获区域必须从按钮对象派生，而不是另起炉灶。这样做有两个实在好处——它直接继承按钮已有的属性和事件处理框架，同时因为派生出了独立类型，滚动条滑块的事件就能被准确区分和响应，不会和普通的按钮点击混淆。为了不在后面反复补基础，这一节先把鼠标状态枚举和事件列表扩好。扩展后，鼠标移动、按下、抬起的细分状态都能被控件识别，后续做滑块拖拽和区域点击时，逻辑层就不用再回头补这些脏活。对 MT5 自定义控件有兴趣的，可以现在打开 MetaEditor，新建一个从 CButton 派生的类，只重写 OnEvent 里和鼠标捕获相关的分支，验证一下类型独立后事件是否不再串台。外汇与贵金属 GUI 自动化涉及实时行情交互，属于高风险开发场景，任何控件逻辑错误都可能误导下单判断。

滚动条控件的库类改造细节

在 DoEasy 库里给滚动条补了一套底层定义：滚动区域默认宽度设为 11 像素，扣掉四周各 1 像素边框后，活动区剩 9 像素。这个奇数很关键——箭头三角形能以中心轴均匀绘制，不会左右偏一格。鼠标状态枚举扩到了 8 个方向resize加右侧/底部滚动条悬停，图形元素整数属性从 138 增到 140。箭头画法改成传「底心坐标+相对大小」：大小 1 实际占 1+1+1=3 像素，大小 3 占 3+1+3=7 像素，下限锁 1 但没有上限，调用方自己控尺度。 Form.mqh 里加了区域坐标公开方法，光标落到哪块就置哪 bit 标志；ushort 码位不够时做标志组合。原先在 WinFormBase 调滚动条坐标的代码整段搬进容器类——只有容器才管附着对象溢出后的滚动适配。 ArrowButton 类删了多余的 m_arrow_color 私有变量，直接复用 ForeColor() 控色；四个方向箭头按钮构造里写死绘制大小 3。此前基对象无上层基对象时会踩无效指针崩溃，发送事件消息方法里改成了先探一层再取类型，崩点没了。

MQL5 / C++

class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_TRACK_BACK_COLOR(C&class="macro">#x27;0xF0,0xF0,0xF0&class="macro">#x27;)  class=class="str">"cmt">// ScrollBar control background class="type">color
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_TRACK_BORDER_COLOR(C&class="macro">#x27;0xFF,0xFF,0xFF&class="macro">#x27;)  class=class="str">"cmt">// ScrollBar control frame class="type">color
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_TRACK_FORE_COLOR(C&class="macro">#x27;0x60,0x60,0x60&class="macro">#x27;)  class=class="str">"cmt">// ScrollBar control text class="type">color
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_TRACK_FORE_MOUSE_DOWN(C&class="macro">#x27;0x00,0x00,0x00&class="macro">#x27;)class=class="str">"cmt">// Color of ScrollBar control text when clicking on the control
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_TRACK_FORE_MOUSE_OVER(C&class="macro">#x27;0x00,0x00,0x00&class="macro">#x27;)class=class="str">"cmt">// Color of ScrollBar control text when hovering the mouse over the control
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_THUMB_COLOR(C&class="macro">#x27;0xCD,0xCD,0xCD&class="macro">#x27;)  class=class="str">"cmt">// ScrollBar control capture area class="type">color
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_THUMB_BORDER_COLOR(C&class="macro">#x27;0xCD,0xCD,0xCD&class="macro">#x27;)  class=class="str">"cmt">// ScrollBar control capture area frame class="type">color
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_THUMB_MOUSE_DOWN(C&class="macro">#x27;0x60,0x60,0x60&class="macro">#x27;)  class=class="str">"cmt">// Color of ScrollBar control capture area when clicking on the control

◍ ScrollBar 配色与窗体热区常量

做 MT5 自定义控件时，滚动条（ScrollBar）的视觉状态是最容易被忽略的细节。下面这组宏把滑块、按钮在常态、悬停、按下三种鼠标状态下的颜色全部钉死，改一处就能换肤。滑块悬停捕获区用 0xA6A6A6，按下时文字转白（0xFFFFFF），悬停文字转黑（0x000000）；按钮底色常态 0xF0F0F0，悬停 0xDA DA DA，按下 0x60 60 60。直接抄进 EA 面板工程，界面就不会出现系统默认灰的违和感。两个尺寸常量值得记：默认滚动条宽度 DEF_CONTROL_SCROLL_BAR_WIDTH 是 11 像素，窗体四角拖拽热区 DEF_CONTROL_CORNER_AREA 占 4 像素。ListBox 列间距 X 为 1、行间距 Y 为 0，密排时可以改成 2 和 1 试试。鼠标相对窗体状态的枚举 ENUM_MOUSE_FORM_STATE 从 NONE=0 起，区分了窗体外未按键、窗体外按键、窗体外滚轮三种情况，这是做拖拽改大小逻辑的判断基底。

MQL5 / C++

class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_THUMB_MOUSE_OVER(C&class="macro">#x27;0xA6,0xA6,0xA6&class="macro">#x27;)   class=class="str">"cmt">// Color of ScrollBar control capture area when hovering over the control
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_THUMB_FORE_COLOR(C&class="macro">#x27;0x60,0x60,0x60&class="macro">#x27;)   class=class="str">"cmt">// ScrollBar control capture area text class="type">color
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_THUMB_FORE_MOUSE_DOWN(C&class="macro">#x27;0xFF,0xFF,0xFF&class="macro">#x27;)class=class="str">"cmt">// Color of ScrollBar control capture area text when clicking on the control
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_THUMB_FORE_MOUSE_OVER(C&class="macro">#x27;0x00,0x00,0x00&class="macro">#x27;)class=class="str">"cmt">// Color of ScrollBar control capture area text when hovering the mouse over the control
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_BUTT_COLOR(C&class="macro">#x27;0xF0,0xF0,0xF0&class="macro">#x27;)   class=class="str">"cmt">// ScrollBar control button class="type">color
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_BUTT_BORDER_COLOR(C&class="macro">#x27;0xCD,0xCD,0xCD&class="macro">#x27;)   class=class="str">"cmt">// ScrollBar control button frame class="type">color
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_BUTT_MOUSE_DOWN(C&class="macro">#x27;0x60,0x60,0x60&class="macro">#x27;)   class=class="str">"cmt">// Color of ScrollBar control buttons when clicking on the control
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_BUTT_MOUSE_OVER(C&class="macro">#x27;0xDA,0xDA,0xDA&class="macro">#x27;)   class=class="str">"cmt">// Color of ScrollBar control buttons when hovering the mouse over the control
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_BUTT_FORE_COLOR(C&class="macro">#x27;0x60,0x60,0x60&class="macro">#x27;)   class=class="str">"cmt">// ScrollBar control button text class="type">color
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_BUTT_FORE_MOUSE_DOWN(C&class="macro">#x27;0xFF,0xFF,0xFF&class="macro">#x27;)class=class="str">"cmt">// Color of ScrollBar control button text when clicking on the control
class="macro">#define CLR_DEF_CONTROL_SCROLL_BAR_BUTT_FORE_MOUSE_OVER(C&class="macro">#x27;0x00,0x00,0x00&class="macro">#x27;)class=class="str">"cmt">// Color of ScrollBar control button text when hovering the mouse over the control
class="macro">#define DEF_CONTROL_SCROLL_BAR_WIDTH(class="num">11)                 class=class="str">"cmt">// Default ScrollBar control width
class="macro">#define DEF_CONTROL_CORNER_AREA(class="num">4)                  class=class="str">"cmt">// Number of pixels defining the corner area to resize
class="macro">#define DEF_CONTROL_LIST_MARGIN_X(class="num">1)                  class=class="str">"cmt">// Gap between columns in ListBox controls
class="macro">#define DEF_CONTROL_LIST_MARGIN_Y(class="num">0)                  class=class="str">"cmt">// Gap between rows in ListBox controls
class=class="str">"cmt">//+------------------------------------------------------------------+
class=class="str">"cmt">//| The list of possible mouse states relative to the form            |
class=class="str">"cmt">//+------------------------------------------------------------------+
enum ENUM_MOUSE_FORM_STATE
  {
   MOUSE_FORM_STATE_NONE = class="num">0,                                                    class=class="str">"cmt">// Undefined state
class=class="str">"cmt">//--- Outside the form
   MOUSE_FORM_STATE_OUTSIDE_FORM_NOT_PRESSED,                                    class=class="str">"cmt">// The cursor is outside the form, the mouse buttons are not clicked
   MOUSE_FORM_STATE_OUTSIDE_FORM_PRESSED,                                        class=class="str">"cmt">// The cursor is outside the form, the mouse button(any) is clicked
   MOUSE_FORM_STATE_OUTSIDE_FORM_WHEEL,                                          class=class="str">"cmt">// The cursor is outside the form, the mouse wheel is being scrolled
class=class="str">"cmt">//--- Within the form

「鼠标在自定义窗体各区域的状态枚举」

给 MT5 写自定义面板时，要区分鼠标落在窗体哪个位置、处于什么动作，靠的是一组状态枚举。下面这段把光标在窗体内部、标题活动区、滚动区、缩放区的细分状态列全了，方便在 OnChartEvent 里做分支。光标在窗体内部（非标题）分三种：未按键、任意键按下、滚轮滚动。标题活动区更复杂，除了上述三种还多了左键释放态 MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_RELEASED，拖拽标题栏时靠它判定落点。右侧与底部滚动区各自有 NOT_PRESSED / PRESSED / WHEEL 三态，共 6 个枚举；顶部与底部、左、右、左上等缩放区同理，每个方向也配齐三态。实际写 GUI 时，用这些枚举做 switch 比手动算坐标边界更稳，能少写约 30% 的命中判断代码。

MQL5 / C++

  MOUSE_FORM_STATE_INSIDE_FORM_NOT_PRESSED,              class=class="str">"cmt">// The cursor is inside the form, no mouse buttons are clicked
  MOUSE_FORM_STATE_INSIDE_FORM_PRESSED,                    class=class="str">"cmt">// The cursor is inside the form, the mouse button(any) is clicked
  MOUSE_FORM_STATE_INSIDE_FORM_WHEEL,                      class=class="str">"cmt">// The cursor is inside the form, the mouse wheel is being scrolled
class=class="str">"cmt">//--- Within the window header area
  MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_NOT_PRESSED,         class=class="str">"cmt">// The cursor is inside the active area, the mouse buttons are not clicked
  MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_PRESSED,             class=class="str">"cmt">// The cursor is inside the active area,  any mouse button is clicked
  MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_WHEEL,               class=class="str">"cmt">// The cursor is inside the active area, the mouse wheel is being scrolled
  MOUSE_FORM_STATE_INSIDE_ACTIVE_AREA_RELEASED,            class=class="str">"cmt">// The cursor is inside the active area, left mouse button is released

class=class="str">"cmt">//--- Within the window scrolling area to the right
  MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_RIGHT_NOT_PRESSED,   class=class="str">"cmt">// The cursor is within the window scrolling area to the right, the mouse buttons are not clicked
  MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_RIGHT_PRESSED,       class=class="str">"cmt">// The cursor is within the window scrolling area to the right, the mouse button(any) is clicked
  MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_RIGHT_WHEEL,         class=class="str">"cmt">// The cursor is within the window scrolling area to the right, the mouse wheel is being scrolled
class=class="str">"cmt">//--- Within the window scrolling area at the bottom
  MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_BOTTOM_NOT_PRESSED,  class=class="str">"cmt">// The cursor is within the window scrolling area at the bottom, the mouse buttons are not clicked
  MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_BOTTOM_PRESSED,      class=class="str">"cmt">// The cursor is within the window scrolling area at the bottom, the mouse button(any) is clicked
  MOUSE_FORM_STATE_INSIDE_SCROLL_AREA_BOTTOM_WHEEL,        class=class="str">"cmt">// The cursor is within the window scrolling area at the bottom, the mouse wheel is being scrolled
class=class="str">"cmt">//--- Within the window resizing area at the top
  MOUSE_FORM_STATE_INSIDE_RESIZE_TOP_AREA_NOT_PRESSED,     class=class="str">"cmt">// The cursor is within the window resizing area at the top, the mouse buttons are not clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_TOP_AREA_PRESSED,         class=class="str">"cmt">// The cursor is within the window resizing area at the top, the mouse button(any) is clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_TOP_AREA_WHEEL,           class=class="str">"cmt">// The cursor is within the window resizing area at the top, the mouse wheel is being scrolled
class=class="str">"cmt">//--- Within the window resizing area at the bottom
  MOUSE_FORM_STATE_INSIDE_RESIZE_BOTTOM_AREA_NOT_PRESSED,  class=class="str">"cmt">// The cursor is within the window resizing area at the bottom, the mouse buttons are not clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_BOTTOM_AREA_PRESSED,      class=class="str">"cmt">// The cursor is within the window resizing area at the bottom, the mouse button(any) is clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_BOTTOM_AREA_WHEEL,        class=class="str">"cmt">// The cursor is within the window resizing area at the bottom, the mouse wheel is being scrolled
class=class="str">"cmt">//--- Within the window resizing area to the left
  MOUSE_FORM_STATE_INSIDE_RESIZE_LEFT_AREA_NOT_PRESSED,    class=class="str">"cmt">// The cursor is within the window resizing area to the left, the mouse buttons are not clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_LEFT_AREA_PRESSED,        class=class="str">"cmt">// The cursor is within the window resizing area to the left, the mouse button(any) is clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_LEFT_AREA_WHEEL,          class=class="str">"cmt">// The cursor is within the window resizing area to the left, the mouse wheel is being scrolled
class=class="str">"cmt">//--- Within the window resizing area to the right
  MOUSE_FORM_STATE_INSIDE_RESIZE_RIGHT_AREA_NOT_PRESSED,   class=class="str">"cmt">// The cursor is within the window resizing area to the right, the mouse buttons are not clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_RIGHT_AREA_PRESSED,       class=class="str">"cmt">// The cursor is within the window resizing area to the right, the mouse button(any) is clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_RIGHT_AREA_WHEEL,         class=class="str">"cmt">// The cursor is within the window resizing area to the right, the mouse wheel is being scrolled
class=class="str">"cmt">//--- Within the window resizing area to the top-left

枚举里的鼠标状态与事件收尾

上面这段枚举把自定义窗体四个角的拖拽热区拆得很细：左上、右上、左下、右下各自都有未按键、已按键、滚轮滚动三种状态，加上控制区同样的三态，合计 15 个 MOUSE_FORM_STATE_* 常量。紧接其后的 ENUM_MOUSE_EVENT 从 CHART_OBJ_EVENTS_NEXT_CODE 起步定义事件号，先覆盖窗体外（无事件/按键/滚轮）与窗体内（无按键/按键/滚轮）共 6 种，再准备向下扩展到窗体活动区。在 MT5 里写自定义面板时，直接吃这两个枚举就能省掉自己算光标坐标落在哪块的逻辑；开 MT5 新建一个 EA 把这段粘进头文件，编译后鼠标移到四角应能看到状态常量随光标切换。

MQL5 / C++

  MOUSE_FORM_STATE_INSIDE_RESIZE_TOP_LEFT_AREA_NOT_PRESSED,   class=class="str">"cmt">// The cursor is within the window resizing area at the top-left, the mouse buttons are not clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_TOP_LEFT_AREA_PRESSED,        class=class="str">"cmt">// The cursor is within the window resizing area at the top-left, the mouse button(any) is clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_TOP_LEFT_AREA_WHEEL,          class=class="str">"cmt">// The cursor is within the window resizing area at the top-left, the mouse wheel is being scrolled
class=class="str">"cmt">//--- Within the window resizing area to the top-right
  MOUSE_FORM_STATE_INSIDE_RESIZE_TOP_RIGHT_AREA_NOT_PRESSED,   class=class="str">"cmt">// The cursor is within the window resizing area at the top-right, the mouse buttons are not clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_TOP_RIGHT_AREA_PRESSED,       class=class="str">"cmt">// The cursor is within the window resizing area at the top-right, the mouse button(any) is clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_TOP_RIGHT_AREA_WHEEL,         class=class="str">"cmt">// The cursor is within the window resizing area at the top-right, the mouse wheel is being scrolled
class=class="str">"cmt">//--- Within the window resizing area at the bottom left
  MOUSE_FORM_STATE_INSIDE_RESIZE_BOTTOM_LEFT_AREA_NOT_PRESSED, class=class="str">"cmt">// The cursor is within the window resizing area at the bottom-left, the mouse buttons are not clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_BOTTOM_LEFT_AREA_PRESSED,     class=class="str">"cmt">// The cursor is within the window resizing area at the bottom-left, the mouse button(any) is clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_BOTTOM_LEFT_AREA_WHEEL,       class=class="str">"cmt">// The cursor is within the window resizing area at the bottom-left, the mouse wheel is being scrolled
class=class="str">"cmt">//--- Within the window resizing area at the bottom-right
  MOUSE_FORM_STATE_INSIDE_RESIZE_BOTTOM_RIGHT_AREA_NOT_PRESSED,class=class="str">"cmt">// The cursor is within the window resizing area at the bottom-right, the mouse buttons are not clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_BOTTOM_RIGHT_AREA_PRESSED,    class=class="str">"cmt">// The cursor is within the window resizing area at the bottom-right, the mouse button(any) is clicked
  MOUSE_FORM_STATE_INSIDE_RESIZE_BOTTOM_RIGHT_AREA_WHEEL,      class=class="str">"cmt">// The cursor is within the window resizing area at the bottom-right, the mouse wheel is being scrolled
class=class="str">"cmt">//--- Within the control area
  MOUSE_FORM_STATE_INSIDE_CONTROL_AREA_NOT_PRESSED,    class=class="str">"cmt">// The cursor is within the control area, the mouse buttons are not clicked
  MOUSE_FORM_STATE_INSIDE_CONTROL_AREA_PRESSED,        class=class="str">"cmt">// The cursor is within the control area, the mouse button(any) is clicked
  MOUSE_FORM_STATE_INSIDE_CONTROL_AREA_WHEEL,          class=class="str">"cmt">// The cursor is within the control area, the mouse wheel is being scrolled
  };
class=class="str">"cmt">//+------------------------------------------------------------------+
class=class="str">"cmt">//+--------------------------------------------+
class=class="str">"cmt">//| List of possible mouse events              |
class=class="str">"cmt">//+--------------------------------------------+
enum ENUM_MOUSE_EVENT
  {
  MOUSE_EVENT_NO_EVENT = CHART_OBJ_EVENTS_NEXT_CODE, class=class="str">"cmt">// No event
class=class="str">"cmt">//---
  MOUSE_EVENT_OUTSIDE_FORM_NOT_PRESSED,              class=class="str">"cmt">// The cursor is outside the form, the mouse buttons are not clicked
  MOUSE_EVENT_OUTSIDE_FORM_PRESSED,                  class=class="str">"cmt">// The cursor is outside the form, the mouse button(any) is clicked
  MOUSE_EVENT_OUTSIDE_FORM_WHEEL,                    class=class="str">"cmt">// The cursor is outside the form, the mouse wheel is being scrolled
class=class="str">"cmt">//--- Within the form
  MOUSE_EVENT_INSIDE_FORM_NOT_PRESSED,               class=class="str">"cmt">// The cursor is inside the form, no mouse buttons are clicked
  MOUSE_EVENT_INSIDE_FORM_PRESSED,                   class=class="str">"cmt">// The cursor is inside the form, the mouse button(any) is clicked
  MOUSE_EVENT_INSIDE_FORM_WHEEL,                     class=class="str">"cmt">// The cursor is inside the form, the mouse wheel is being scrolled
class=class="str">"cmt">//--- Within the window active area

→

DoEasy. 控件（第三十部分）：动画态滚动条控件·进阶篇

常见问题

不会。捕捉区在鼠标离开按钮后释放捕获，滚动停止，需重新悬停或按下才继续。

重点重写鼠标按下、移动、释放三个事件方法，把按钮逻辑改为区域捕获与动画位移。

可以。小布能读取控件常量与窗体热区枚举，标出重叠区域和异常配色，省去手动核对。

配色与热区常量集中在滚动条类头部，改完只需重编译引用该类的窗体，不必全量构建。

在事件收尾用默认分支统一复位状态，并对未处理枚举值打日志，防止静默漏判。

DoEasy. 控件（第三十部分）：动画态滚动条控件（基础篇）

◍ 给滚动条加上动画态捕捉区

「从滚动条按钮到捕获区的对象派生」

滚动条控件的库类改造细节

◍ ScrollBar 配色与窗体热区常量

「鼠标在自定义窗体各区域的状态枚举」

枚举里的鼠标状态与事件收尾

常见问题

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