MQL5参考标准程序库自定义图形CPieChart

CPieChart

绘制饼图的类。

ccanvas_piechart

下面提供图形上方的代码。

描述

该类中包含的方法专为饼图的全比例操作而设计，从创建图形资源到设计片段标签。

声明

class CPieChart : public CChartCanvas

主题

#include <Canvas\Charts\PieChart.mqh>

继承体系

CCanvas

CChartCanvas

CPieChart

类函数

方法	动作
Create	创建图形资源的虚拟方法。
SeriesSet	设置将在饼图上显示的序列值。
ValueAdd	添加新值到饼图（到结束）。
ValueInsert	插入新值到饼图（指定位置）。
ValueUpdate	更新饼图上的值（指定位置）。
ValueDelete	从饼图删除值（指定位置）。
DrawChart	绘制饼图及其全部元素的虚拟方法。
DrawPie	绘制对应指定值的饼图片段。
LabelMake	基于其值和原标签生成片段标签。

方法继承自类 CCanvas CreateBitmap, CreateBitmap, CreateBitmapLabel, CreateBitmapLabel, Attach, Attach, Destroy, ChartObjectName, ResourceName, Width, Height, Update, Resize, Erase, PixelGet, PixelSet, LineVertical, LineHorizontal, Line, Polyline, Polygon, Rectangle, Triangle, Circle, Ellipse, Arc, Arc, Arc, Pie, Pie, FillRectangle, FillTriangle, FillPolygon, FillCircle, FillEllipse, Fill, Fill, PixelSetAA, LineAA, PolylineAA, PolygonAA, TriangleAA, CircleAA, EllipseAA, LineWu, PolylineWu, PolygonWu, TriangleWu, CircleWu, EllipseWu, LineThickVertical, LineThickHorizontal, LineThick, PolylineThick, PolygonThick, PolylineSmooth, PolygonSmooth, FontSet, FontNameSet, FontSizeSet, FontFlagsSet, FontAngleSet, FontGet, FontNameGet, FontSizeGet, FontFlagsGet, FontAngleGet, TextOut, TextWidth, TextHeight, TextSize, GetDefaultColor, TransparentLevelSet, LoadFromFile, LineStyleGet, LineStyleSet
方法继承自类 CChartCanvas ColorBackground, ColorBackground, ColorBorder, ColorBorder, ColorText, ColorText, ColorGrid, ColorGrid, MaxData, MaxData, MaxDescrLen, MaxDescrLen, AllowedShowFlags, ShowFlags, ShowFlags, IsShowLegend, IsShowScaleLeft, IsShowScaleRight, IsShowScaleTop, IsShowScaleBottom, IsShowGrid, IsShowDescriptors, IsShowPercent, ShowLegend, ShowScaleLeft, ShowScaleRight, ShowScaleTop, ShowScaleBottom, ShowGrid, ShowDescriptors, ShowValue, ShowPercent, LegendAlignment, Accumulative, VScaleMin, VScaleMin, VScaleMax, VScaleMax, NumGrid, NumGrid, VScaleParams, DataOffset, DataOffset, DataTotal, DescriptorUpdate, ColorUpdate

方法继承自类 CCanvas

CreateBitmap, CreateBitmap, CreateBitmapLabel, CreateBitmapLabel, Attach, Attach, Destroy, ChartObjectName, ResourceName, Width, Height, Update, Resize, Erase, PixelGet, PixelSet, LineVertical, LineHorizontal, Line, Polyline, Polygon, Rectangle, Triangle, Circle, Ellipse, Arc, Arc, Arc, Pie, Pie, FillRectangle, FillTriangle, FillPolygon, FillCircle, FillEllipse, Fill, Fill, PixelSetAA, LineAA, PolylineAA, PolygonAA, TriangleAA, CircleAA, EllipseAA, LineWu, PolylineWu, PolygonWu, TriangleWu, CircleWu, EllipseWu, LineThickVertical, LineThickHorizontal, LineThick, PolylineThick, PolygonThick, PolylineSmooth, PolygonSmooth, FontSet, FontNameSet, FontSizeSet, FontFlagsSet, FontAngleSet, FontGet, FontNameGet, FontSizeGet, FontFlagsGet, FontAngleGet, TextOut, TextWidth, TextHeight, TextSize, GetDefaultColor, TransparentLevelSet, LoadFromFile, LineStyleGet, LineStyleSet

方法继承自类 CChartCanvas

ColorBackground, ColorBackground, ColorBorder, ColorBorder, ColorText, ColorText, ColorGrid, ColorGrid, MaxData, MaxData, MaxDescrLen, MaxDescrLen, AllowedShowFlags, ShowFlags, ShowFlags, IsShowLegend, IsShowScaleLeft, IsShowScaleRight, IsShowScaleTop, IsShowScaleBottom, IsShowGrid, IsShowDescriptors, IsShowPercent, ShowLegend, ShowScaleLeft, ShowScaleRight, ShowScaleTop, ShowScaleBottom, ShowGrid, ShowDescriptors, ShowValue, ShowPercent, LegendAlignment, Accumulative, VScaleMin, VScaleMin, VScaleMax, VScaleMax, NumGrid, NumGrid, VScaleParams, DataOffset, DataOffset, DataTotal, DescriptorUpdate, ColorUpdate

示例

//+------------------------------------------------------------------+
//|                                               PieChartSample.mq5 |
//|                   Copyright 2009-2017, MetaQuotes Software Corp. |
//|                                              http://www.mql5.com |
//+------------------------------------------------------------------+
#property copyright   "2009-2017, MetaQuotes Software Corp."
#property link        "http://www.mql5.com"
#property description "Example of using pie chart"
//---
#include <Canvas\Charts\PieChart.mqh>
//+------------------------------------------------------------------+
//| 输入                                                             |
//+------------------------------------------------------------------+
input int      Width=600;
input int      Height=450;
//+------------------------------------------------------------------+
//| 脚本程序起始函数                                                   |
//+------------------------------------------------------------------+
int OnStart(void)
  {
//--- 检查
   if(Width<=0 || Height<=0)
     {
      Print("Too simple.");
      return(-1);
     }
//--- 创建图表
   CPieChart pie_chart;
   if(!pie_chart.CreateBitmapLabel("PieChart",10,10,Width,Height))
     {
      Print("Error creating pie chart: ",GetLastError());
      return(-1);
     }
   pie_chart.ShowPercent();
//--- 绘制
   for(uint i=0;i<30;i++)
     {
      pie_chart.ValueAdd(100*(i+1),"Item "+IntegerToString(i));
      Sleep(10);
     }
   Sleep(2000);
//--- 禁用图例
   pie_chart.LegendAlignment(ALIGNMENT_LEFT);
   Sleep(2000);
//--- 禁用图例
   pie_chart.LegendAlignment(ALIGNMENT_RIGHT);
   Sleep(2000);
//--- 禁用图例
   pie_chart.LegendAlignment(ALIGNMENT_TOP);
   Sleep(2000);
//--- 禁用图例
   pie_chart.ShowLegend(false);
   Sleep(2000);
//--- 禁用百分比
   pie_chart.ShowPercent(false);
   Sleep(2000);
//--- 禁用描述符
   pie_chart.ShowDescriptors(false);
   Sleep(2000);
//--- 全部启用
   pie_chart.ShowLegend();
   pie_chart.ShowValue();
   pie_chart.ShowDescriptors();
   Sleep(2000);
//--- 或这样
   pie_chart.ShowFlags(FLAG_SHOW_LEGEND|FLAG_SHOW_DESCRIPTORS|FLAG_SHOW_PERCENT);
   uint total=pie_chart.DataTotal();
//--- 使用值
   for(uint i=0;i<total && !IsStopped();i++)
     {
      pie_chart.ValueUpdate(i,100*(rand()%10+1));
      Sleep(1000);
     }
//--- 使用颜色
   for(uint i=0;i<total && !IsStopped();i++)
     {
      pie_chart.ColorUpdate(i%total,RandomRGB());
      Sleep(1000);
     }
//--- 循环
   while(!IsStopped())
     {
      pie_chart.DataOffset(pie_chart.DataOffset()+1);
      Sleep(200);
     }
//--- 完成
   pie_chart.Destroy();
   return(0);
  }
//+------------------------------------------------------------------+
//| 随机RGB颜色                                                       |
//+------------------------------------------------------------------+
uint RandomRGB(void)
  {
   return(XRGB(rand()%255,rand()%255,rand()%255));
  }

CalcArea

Create