DoEasy. 控件 (第 28 部分): 进度条控件中的柱线样式·进阶篇
（2/3）·连续线之外还有两种进度条视觉语言，文本叠加与构造简化决定控件上限
多数自建进度条只用到连续线一种样式，遇到未知迭代次数的后台任务就只能干等或硬编估算值。分段块和滚动块本就是原生控件语言，却常被忽略，导致界面反馈和真实状态脱节。
「图形元素基类的构造细节」
在 MT5 自定义图形库里，CGCnvElement 的构造函数承担了把图表背景色、坐标窗口、字体等一次性绑定的工作。它先用 ChartGetInteger 取 CHART_COLOR_BACKGROUND，若传入 chart_id 为 NULL 或 0 则回退到 ChartID()，这一步决定了后续元素绘制时底色参照哪个图表。 构造函数里对三个背景色数组都做了 ArrayResize(...,1) 并写入同一初始背景色，分别是 m_array_colors_bg、m_array_colors_bg_dwn、m_array_colors_bg_ovr，对应常态、按下、悬停三态。若 resize 返回值不等于 1，数组就不会被赋值，这点在调试自定义控件闪烁时容易被忽略。 真正创建对象靠 this.Create(chart_id,wnd_num,x,y,w,h,redraw)，成功后才调 Initialize 并先把可见性关掉（SetVisibleFlag(false,false)），失败则 Print 出错信息含元素类型描述与对象名。想验证的话，把 redraw 从 false 改成 true，观察元素在 EA 初始化阶段是否立即重绘。
class="kw">const class="type">uchar opacity, class="kw">const class="type">bool movable=true, class="kw">const class="type">bool activity=true, class="kw">const class="type">bool redraw=class="kw">false) : m_shadow(class="kw">false) { this.SetTypeElement(element_type); this.m_type=OBJECT_DE_TYPE_GELEMENT; this.m_element_main=main_obj; this.m_element_base=base_obj; this.m_chart_color_bg=(class="type">color)::ChartGetInteger((chart_id==NULL ? ::ChartID() : chart_id),CHART_COLOR_BACKGROUND); this.m_name=this.CreateNameGraphElement(element_type); this.m_chart_id=(chart_id==NULL || chart_id==class="num">0 ? ::ChartID() : chart_id); this.m_subwindow=wnd_num; this.SetFont(DEF_FONT,DEF_FONT_SIZE); this.m_text_anchor=class="num">0; this.m_text_x=class="num">0; this.m_text_y=class="num">0; this.SetBackgroundColor(colour,true); this.SetOpacity(opacity); this.m_shift_coord_x=class="num">0; this.m_shift_coord_y=class="num">0; if(::ArrayResize(this.m_array_colors_bg,class="num">1)==class="num">1) this.m_array_colors_bg[class="num">0]=this.BackgroundColor(); if(::ArrayResize(this.m_array_colors_bg_dwn,class="num">1)==class="num">1) this.m_array_colors_bg_dwn[class="num">0]=this.BackgroundColor(); if(::ArrayResize(this.m_array_colors_bg_ovr,class="num">1)==class="num">1) this.m_array_colors_bg_ovr[class="num">0]=this.BackgroundColor(); if(this.Create(chart_id,wnd_num,x,y,w,h,redraw)) { this.Initialize(element_type,element_id,element_num,x,y,w,h,descript,movable,activity); this.SetVisibleFlag(class="kw">false,class="kw">false); } else { ::Print(DFUN,CMessage::Text(MSG_LIB_SYS_FAILED_CREATE_ELM_OBJ),"\"",this.TypeElementDescription(element_type),"\" ",this.NameObj()); } } class=class="str">"cmt">//+---------------------------------------------+ class=class="str">"cmt">//| Protected constructor | class=class="str">"cmt">//+---------------------------------------------+ CGCnvElement::CGCnvElement(class="kw">const ENUM_GRAPH_ELEMENT_TYPE element_type, CGCnvElement *main_obj,CGCnvElement *base_obj, class="kw">const class="type">long chart_id,
图形元素的构造函数拆解
在 MT5 自定义图形库里，每个图元对象都需要一个显式构造函数来绑定图表、坐标与尺寸。下面这段参数列表与初始化体，就是 C_GraphElement 派生类落地时的核心入口。 构造函数接收图表 ID、子窗口序号 wnd_num、描述 descript 以及 x/y/w/h 这组像素坐标和宽高，并以 m_shadow(false) 初始化关闭阴影。注意 chart_id 若为 NULL 或 0，会回退到 ChartID() 取当前图表，这个兜底能避免多图表实例里绑错画布。 进入函数体后，先写死 m_type=OBJECT_DE_TYPE_GELEMENT 标记元素类别，再把传入的 main_obj、base_obj 存进成员。紧接着用 ChartGetInteger 读 CHART_COLOR_BACKGROUND，把图表背景色缓存到 m_chart_color_bg——后续重绘时直接用，少一次系统调用。 字体走默认宏 DEF_FONT / DEF_FONT_SIZE，文本锚点和偏移 x/y 全部置 0；背景设 CLR_CANV_NULL 且透明度和偏移均为 0。三个背景色数组 m_array_colors_bg / _dwn / _ovr 各 ArrayResize 到 1 并填默认背景色，为后续状态切换留坑。 最后调 this.Create() 真正建对象，成功就跑 Initialize() 并先 SetVisibleFlag(false) 隐藏，失败则 Print 报错含元素类型描述与对象名。外汇与贵金属图表上挂这类自绘元素波动剧烈时可能掉帧，建议在模拟盘先验证。
class="kw">const class="type">int wnd_num, class="kw">const class="type">class="kw">string descript, class="kw">const class="type">int x, class="kw">const class="type">int y, class="kw">const class="type">int w, class="kw">const class="type">int h) : m_shadow(class="kw">false) { this.m_type=OBJECT_DE_TYPE_GELEMENT; this.m_element_main=main_obj; this.m_element_base=base_obj; this.m_chart_color_bg=(class="type">color)::ChartGetInteger((chart_id==NULL ? ::ChartID() : chart_id),CHART_COLOR_BACKGROUND); this.m_name=this.CreateNameGraphElement(element_type); this.m_chart_id=(chart_id==NULL || chart_id==class="num">0 ? ::ChartID() : chart_id); this.m_subwindow=wnd_num; this.m_type_element=element_type; this.SetFont(DEF_FONT,DEF_FONT_SIZE); this.m_text_anchor=class="num">0; this.m_text_x=class="num">0; this.m_text_y=class="num">0; this.SetBackgroundColor(CLR_CANV_NULL,true); this.SetOpacity(class="num">0); this.m_shift_coord_x=class="num">0; this.m_shift_coord_y=class="num">0; if(::ArrayResize(this.m_array_colors_bg,class="num">1)==class="num">1) this.m_array_colors_bg[class="num">0]=this.BackgroundColor(); if(::ArrayResize(this.m_array_colors_bg_dwn,class="num">1)==class="num">1) this.m_array_colors_bg_dwn[class="num">0]=this.BackgroundColor(); if(::ArrayResize(this.m_array_colors_bg_ovr,class="num">1)==class="num">1) this.m_array_colors_bg_ovr[class="num">0]=this.BackgroundColor(); if(this.Create(chart_id,wnd_num,x,y,w,h,class="kw">false)) { this.Initialize(element_type,class="num">0,class="num">0,x,y,w,h,descript,class="kw">false,class="kw">false); this.SetVisibleFlag(class="kw">false,class="kw">false); } else { ::Print(DFUN,CMessage::Text(MSG_LIB_SYS_FAILED_CREATE_ELM_OBJ),"\"",this.TypeElementDescription(element_type),"\" ",this.NameObj()); } }
◍ 画布元素的初始化属性落点
在 MT5 自定义图形界面开发里，CGCnvElement::Initialize 负责把一个图形元素的所有基础属性一次性写进对象内部。调用时传入的元素类型、ID、序号、坐标与宽高，会分别映射到 CANV_ELEMENT_PROP 系列常量上，后续绘制和事件命中都依赖这套初始登记。 下面这段实现把画布资源名、图表 ID、子窗口索引和对象名先绑定到全局基对象，再依次写入类型、ID、列表序号与 X/Y/W/H。注意活动区域偏移（ACT_SHIFT_*）在初始化时全部置 0，意味着默认激活区等同元素外框，若你要做仅中间可拖拽的按钮，得在初始化后手动改这四个值。 movable 参数直接决定元素是否允许用户拖动，写入 CANV_ELEMENT_PROP_MOVABLE。外汇与贵金属图表上叠加可移动面板有滑点误操作风险，建议仅在回测可视化或离线分析工具里开启，实盘挂单界面保持 false 更稳。
class="type">void CGCnvElement::Initialize(class="kw">const ENUM_GRAPH_ELEMENT_TYPE element_type, class="kw">const class="type">int element_id,class="kw">const class="type">int element_num, class="kw">const class="type">int x,class="kw">const class="type">int y,class="kw">const class="type">int w,class="kw">const class="type">int h, class="kw">const class="type">class="kw">string descript,class="kw">const class="type">bool movable,class="kw">const class="type">bool activity) { this.SetProperty(CANV_ELEMENT_PROP_NAME_RES,this.m_canvas.ResourceName()); class=class="str">"cmt">// Graphical resource name this.SetProperty(CANV_ELEMENT_PROP_CHART_ID,CGBaseObj::ChartID()); class=class="str">"cmt">// Chart ID this.SetProperty(CANV_ELEMENT_PROP_WND_NUM,CGBaseObj::SubWindow()); class=class="str">"cmt">// Chart subwindow index this.SetProperty(CANV_ELEMENT_PROP_NAME_OBJ,CGBaseObj::Name()); class=class="str">"cmt">// Element object name this.SetProperty(CANV_ELEMENT_PROP_TYPE,element_type); class=class="str">"cmt">// Graphical element type this.SetProperty(CANV_ELEMENT_PROP_ID,element_id); class=class="str">"cmt">// Element ID this.SetProperty(CANV_ELEMENT_PROP_NUM,element_num); class=class="str">"cmt">// Element index in the list this.SetProperty(CANV_ELEMENT_PROP_COORD_X,x); class=class="str">"cmt">// Element&class="macro">#x27;s X coordinate on the chart this.SetProperty(CANV_ELEMENT_PROP_COORD_Y,y); class=class="str">"cmt">// Element&class="macro">#x27;s Y coordinate on the chart this.SetProperty(CANV_ELEMENT_PROP_WIDTH,w); class=class="str">"cmt">// Element width this.SetProperty(CANV_ELEMENT_PROP_HEIGHT,h); class=class="str">"cmt">// Element height this.SetProperty(CANV_ELEMENT_PROP_ACT_SHIFT_LEFT,class="num">0); class=class="str">"cmt">// Active area offset from the left edge of the element this.SetProperty(CANV_ELEMENT_PROP_ACT_SHIFT_TOP,class="num">0); class=class="str">"cmt">// Active area offset from the upper edge of the element this.SetProperty(CANV_ELEMENT_PROP_ACT_SHIFT_RIGHT,class="num">0); class=class="str">"cmt">// Active area offset from the right edge of the element this.SetProperty(CANV_ELEMENT_PROP_ACT_SHIFT_BOTTOM,class="num">0); class=class="str">"cmt">// Active area offset from the bottom edge of the element this.SetProperty(CANV_ELEMENT_PROP_MOVABLE,movable); class=class="str">"cmt">// Element moveability flag
「初始化画布控件属性的底层写法」
在 MT5 自定义图形界面里，一个新控件刚被构造时，必须一次性把自身状态写进属性表，否则后续重绘和事件响应会拿到空值。下面这段连续 SetProperty 调用，就是把一个画布元素从「内存对象」变成「可交互部件」的关键步骤。 this.SetProperty(CANV_ELEMENT_PROP_ACTIVE,activity); // 设置元素活动标志，activity 为传入参数 this.SetProperty(CANV_ELEMENT_PROP_INTERACTION,false); // 关闭与外界环境的交互标志 this.SetProperty(CANV_ELEMENT_PROP_ENABLED,true); // 元素可用标志置真 this.SetProperty(CANV_ELEMENT_PROP_RIGHT,this.RightEdge()); // 元素右边界取自身 RightEdge() this.SetProperty(CANV_ELEMENT_PROP_BOTTOM,this.BottomEdge()); // 元素底边界取自身 BottomEdge() this.SetProperty(CANV_ELEMENT_PROP_COORD_ACT_X,this.ActiveAreaLeft()); // 活动区 X 坐标取 ActiveAreaLeft() this.SetProperty(CANV_ELEMENT_PROP_COORD_ACT_Y,this.ActiveAreaTop()); // 活动区 Y 坐标取 ActiveAreaTop() this.SetProperty(CANV_ELEMENT_PROP_ACT_RIGHT,this.ActiveAreaRight()); // 活动区右边界取 ActiveAreaRight() this.SetProperty(CANV_ELEMENT_PROP_ACT_BOTTOM,this.ActiveAreaBottom()); // 活动区底边界取 ActiveAreaBottom() this.SetProperty(CANV_ELEMENT_PROP_VISIBLE_AREA_X,0); // 可见区域 X 坐标设为 0 this.SetProperty(CANV_ELEMENT_PROP_VISIBLE_AREA_Y,0); // 可见区域 Y 坐标设为 0 this.SetProperty(CANV_ELEMENT_PROP_VISIBLE_AREA_WIDTH,w); // 可见区域宽度取参数 w this.SetProperty(CANV_ELEMENT_PROP_VISIBLE_AREA_HEIGHT,h); // 可见区域高度取参数 h this.SetProperty(CANV_ELEMENT_PROP_DISPLAYED,true); // 非隐藏控件显示标志置真 this.SetProperty(CANV_ELEMENT_PROP_DISPLAY_STATE,CANV_ELEMENT_DISPLAY_STATE_NORMAL); // 显示状态设为正常 this.SetProperty(CANV_ELEMENT_PROP_DISPLAY_DURATION,DEF_CONTROL_PROCESS_DURATION); // 显示时长取宏定义值 this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_X,0); // 控制区 X 坐标设为 0 this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_Y,0); // 控制区 Y 坐标设为 0 this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_WIDTH,0); // 控制区宽度暂设 0 this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_HEIGHT,0); // 控制区高度暂设 0 this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_X_RIGHT,0); // 右滚动区 X 坐标设为 0 注意可见区域宽高由外部参数 w、h 决定，而控制区四边先全部填 0，意味着在没绑定具体滑块或按钮前，控件不占交互热区。 开 MT5 新建一个 Canvas 派生类，把上面 23 行原样塞进构造函数，编译后拖到图表，若控件能正常显示但鼠标无响应，优先查 CONTROL_AREA 那四项是否仍全为 0。外汇与贵金属图表挂 EA 做界面改造属高风险操作，参数误写可能导致图表卡死。
this.SetProperty(CANV_ELEMENT_PROP_ACTIVE,activity); class=class="str">"cmt">// Element activity flag this.SetProperty(CANV_ELEMENT_PROP_INTERACTION,class="kw">false); class=class="str">"cmt">// Flag of interaction with the outside environment this.SetProperty(CANV_ELEMENT_PROP_ENABLED,true); class=class="str">"cmt">// Element availability flag this.SetProperty(CANV_ELEMENT_PROP_RIGHT,this.RightEdge()); class=class="str">"cmt">// Element right border this.SetProperty(CANV_ELEMENT_PROP_BOTTOM,this.BottomEdge()); class=class="str">"cmt">// Element bottom border this.SetProperty(CANV_ELEMENT_PROP_COORD_ACT_X,this.ActiveAreaLeft()); class=class="str">"cmt">// X coordinate of the element active area this.SetProperty(CANV_ELEMENT_PROP_COORD_ACT_Y,this.ActiveAreaTop()); class=class="str">"cmt">// Y coordinate of the element active area this.SetProperty(CANV_ELEMENT_PROP_ACT_RIGHT,this.ActiveAreaRight()); class=class="str">"cmt">// Right border of the element active area this.SetProperty(CANV_ELEMENT_PROP_ACT_BOTTOM,this.ActiveAreaBottom()); class=class="str">"cmt">// Bottom border of the element active area this.SetProperty(CANV_ELEMENT_PROP_VISIBLE_AREA_X,class="num">0); class=class="str">"cmt">// Visibility scope X coordinate this.SetProperty(CANV_ELEMENT_PROP_VISIBLE_AREA_Y,class="num">0); class=class="str">"cmt">// Visibility scope Y coordinate this.SetProperty(CANV_ELEMENT_PROP_VISIBLE_AREA_WIDTH,w); class=class="str">"cmt">// Visibility scope width this.SetProperty(CANV_ELEMENT_PROP_VISIBLE_AREA_HEIGHT,h); class=class="str">"cmt">// Visibility scope height this.SetProperty(CANV_ELEMENT_PROP_DISPLAYED,true); class=class="str">"cmt">// Non-hidden control display flag this.SetProperty(CANV_ELEMENT_PROP_DISPLAY_STATE,CANV_ELEMENT_DISPLAY_STATE_NORMAL);class=class="str">"cmt">// Control display state this.SetProperty(CANV_ELEMENT_PROP_DISPLAY_DURATION,DEF_CONTROL_PROCESS_DURATION); class=class="str">"cmt">// Control display duration this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_X,class="num">0); class=class="str">"cmt">// Control area X coordinate this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_Y,class="num">0); class=class="str">"cmt">// Control area Y coordinate this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_WIDTH,class="num">0); class=class="str">"cmt">// Control area width this.SetProperty(CANV_ELEMENT_PROP_CONTROL_AREA_HEIGHT,class="num">0); class=class="str">"cmt">// Control area height this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_X_RIGHT,class="num">0); class=class="str">"cmt">// Right scroll area X coordinate
把画布控件的滚动区与边框压成零
在 MT5 自定义图形控件里，若不想让画布自带右侧、底部滚动条和四周边框抢占图表空间，可以把对应区域参数一次性置 0。下面这段初始化代码把右、下滚动区的坐标宽高全设成 0，同时把左、右、上、下边缘区宽度也清 0，等于告诉绘图引擎：这个控件不需要可视边框和附加滚动热区。 归属与层级也得顺手定掉：CANV_ELEMENT_PROP_BELONG 设为 GRAPH_OBJ_BELONG_PROGRAM 表示元素归程序逻辑管，ZORDER 给 0 意味着点击命中优先级排在最底，不会挡掉图表本身的交互。字体宽度用 FW_NORMAL、边框样式 FRAME_STYLE_NONE，再把上下左右边框尺寸全置 0、边框色取背景色，视觉上就和背景融为一体。 最后 CANV_ELEMENT_PROP_AUTOSIZE 设 false，禁止控件按内容自适应伸缩——对外汇、贵金属这类高波动品种，自适应可能引发频繁重绘，关掉后重绘次数倾向更可控，但高频行情下仍属高风险操作，参数改动前建议先在策略测试器跑一遍。
this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_Y_RIGHT,class="num">0); class=class="str">"cmt">// Right scroll area Y coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_RIGHT,class="num">0); class=class="str">"cmt">// Right scroll area width this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_RIGHT,class="num">0); class=class="str">"cmt">// Right scroll area height this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_X_BOTTOM,class="num">0); class=class="str">"cmt">// Bottom scroll area X coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_Y_BOTTOM,class="num">0); class=class="str">"cmt">// Bottom scroll area Y coordinate this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_WIDTH_BOTTOM,class="num">0); class=class="str">"cmt">// Bottom scroll area width this.SetProperty(CANV_ELEMENT_PROP_SCROLL_AREA_HEIGHT_BOTTOM,class="num">0); class=class="str">"cmt">// Bottom scroll area height this.SetProperty(CANV_ELEMENT_PROP_BORDER_LEFT_AREA_WIDTH,class="num">0); class=class="str">"cmt">// Left edge area width this.SetProperty(CANV_ELEMENT_PROP_BORDER_BOTTOM_AREA_WIDTH,class="num">0); class=class="str">"cmt">// Bottom edge area width this.SetProperty(CANV_ELEMENT_PROP_BORDER_RIGHT_AREA_WIDTH,class="num">0); class=class="str">"cmt">// Right edge area width this.SetProperty(CANV_ELEMENT_PROP_BORDER_TOP_AREA_WIDTH,class="num">0); class=class="str">"cmt">// Top edge area width class=class="str">"cmt">//--- this.SetProperty(CANV_ELEMENT_PROP_BELONG,ENUM_GRAPH_OBJ_BELONG::GRAPH_OBJ_BELONG_PROGRAM); class=class="str">"cmt">// Graphical element affiliation this.SetProperty(CANV_ELEMENT_PROP_ZORDER,class="num">0); class=class="str">"cmt">// Priority of a graphical object for receiving the event of clicking on a chart this.SetProperty(CANV_ELEMENT_PROP_BOLD_TYPE,FW_NORMAL); class=class="str">"cmt">// Font width type this.SetProperty(CANV_ELEMENT_PROP_BORDER_STYLE,FRAME_STYLE_NONE); class=class="str">"cmt">// Control frame style this.SetProperty(CANV_ELEMENT_PROP_BORDER_SIZE_TOP,class="num">0); class=class="str">"cmt">// Control frame top size this.SetProperty(CANV_ELEMENT_PROP_BORDER_SIZE_BOTTOM,class="num">0); class=class="str">"cmt">// Control frame bottom size this.SetProperty(CANV_ELEMENT_PROP_BORDER_SIZE_LEFT,class="num">0); class=class="str">"cmt">// Control frame left size this.SetProperty(CANV_ELEMENT_PROP_BORDER_SIZE_RIGHT,class="num">0); class=class="str">"cmt">// Control frame right size this.SetProperty(CANV_ELEMENT_PROP_BORDER_COLOR,this.BackgroundColor()); class=class="str">"cmt">// Control frame class="type">color this.SetProperty(CANV_ELEMENT_PROP_AUTOSIZE,class="kw">false); class=class="str">"cmt">// Flag of the element auto resizing depending on the content
◍ 控件初始化时的属性落地写法
在 MT5 的 Canvas 控件派生类构造函数里，用 SetProperty 一口气把默认布局与交互状态钉死，是避免界面抖动的最直接办法。下面这段把自动尺寸设为随内容扩张、关掉自动滚动条、四边 margin 和 padding 全置 0，相当于先拿到一块干净画布。 文本与勾选框锚点都设为 ANCHOR_LEFT_UPPER，CHECKED 为 false、AUTOCHECK 为 true，意味着用户点中控件时勾选态会自动翻转，不用在外部再写点击事件。 背景色走 CLR_DEF_CHECK_BACK_COLOR 与对应 OPACITY 宏，这两个是库内预置值，改起来只需替换宏定义就能统一换肤。外汇与贵金属图表挂这类自定义面板时，注意 MT5 界面资源占用偏高，复杂控件在低频机型上可能掉帧，属正常现象。
this.SetProperty(CANV_ELEMENT_PROP_AUTOSIZE_MODE,CANV_ELEMENT_AUTO_SIZE_MODE_GROW); class=class="str">"cmt">// Mode of the element auto resizing depending on the content this.SetProperty(CANV_ELEMENT_PROP_AUTOSCROLL,class="kw">false); class=class="str">"cmt">// Auto scrollbar flag this.SetProperty(CANV_ELEMENT_PROP_AUTOSCROLL_MARGIN_W,class="num">0); class=class="str">"cmt">// Width of the field inside the element during auto scrolling this.SetProperty(CANV_ELEMENT_PROP_AUTOSCROLL_MARGIN_H,class="num">0); class=class="str">"cmt">// Height of the field inside the element during auto scrolling this.SetProperty(CANV_ELEMENT_PROP_DOCK_MODE,CANV_ELEMENT_DOCK_MODE_NONE); class=class="str">"cmt">// Mode of binding control borders to the container this.SetProperty(CANV_ELEMENT_PROP_MARGIN_TOP,class="num">0); class=class="str">"cmt">// Top margin between the fields of this and another control this.SetProperty(CANV_ELEMENT_PROP_MARGIN_BOTTOM,class="num">0); class=class="str">"cmt">// Bottom margin between the fields of this and another control this.SetProperty(CANV_ELEMENT_PROP_MARGIN_LEFT,class="num">0); class=class="str">"cmt">// Left margin between the fields of this and another control this.SetProperty(CANV_ELEMENT_PROP_MARGIN_RIGHT,class="num">0); class=class="str">"cmt">// Right margin between the fields of this and another control this.SetProperty(CANV_ELEMENT_PROP_PADDING_TOP,class="num">0); class=class="str">"cmt">// Top margin inside the control this.SetProperty(CANV_ELEMENT_PROP_PADDING_BOTTOM,class="num">0); class=class="str">"cmt">// Bottom margin inside the control this.SetProperty(CANV_ELEMENT_PROP_PADDING_LEFT,class="num">0); class=class="str">"cmt">// Left margin inside the control this.SetProperty(CANV_ELEMENT_PROP_PADDING_RIGHT,class="num">0); class=class="str">"cmt">// Right margin inside the control this.SetProperty(CANV_ELEMENT_PROP_TEXT_ALIGN,ANCHOR_LEFT_UPPER); class=class="str">"cmt">// Text position within text label boundaries this.SetProperty(CANV_ELEMENT_PROP_CHECK_ALIGN,ANCHOR_LEFT_UPPER); class=class="str">"cmt">// Position of the checkbox within control borders this.SetProperty(CANV_ELEMENT_PROP_CHECKED,class="kw">false); class=class="str">"cmt">// Control checkbox status this.SetProperty(CANV_ELEMENT_PROP_CHECK_STATE,CANV_ELEMENT_CHEK_STATE_UNCHECKED); class=class="str">"cmt">// Status of a control having a checkbox this.SetProperty(CANV_ELEMENT_PROP_AUTOCHECK,true); class=class="str">"cmt">// Auto change flag status when it is selected class=class="str">"cmt">//--- this.SetProperty(CANV_ELEMENT_PROP_CHECK_BACKGROUND_COLOR,CLR_DEF_CHECK_BACK_COLOR); class=class="str">"cmt">// Color of control checkbox background this.SetProperty(CANV_ELEMENT_PROP_CHECK_BACKGROUND_COLOR_OPACITY,CLR_DEF_CHECK_BACK_OPACITY); class=class="str">"cmt">// Opacity of the control checkbox background class="type">color