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High-speed Charting Control

, 13 Jul 2010
A flexible charting control to display 2D data
chartcrtl_src.zip
ChartCtrl_demo.zip
ChartDemo
ChartCtrl
.svn
all-wcprops
entries
format
prop-base
props
text-base
ChartAxis.cpp.svn-base
ChartAxis.h.svn-base
ChartAxisLabel.cpp.svn-base
ChartAxisLabel.h.svn-base
ChartBalloonLabel.h.svn-base
ChartBalloonLabel.inl.svn-base
ChartBarSerie.cpp.svn-base
ChartBarSerie.h.svn-base
ChartCandlestickSerie.cpp.svn-base
ChartCandlestickSerie.h.svn-base
ChartCrossHairCursor.cpp.svn-base
ChartCrossHairCursor.h.svn-base
ChartCtrl.cpp.svn-base
ChartCtrl.h.svn-base
ChartCursor.cpp.svn-base
ChartCursor.h.svn-base
ChartDateTimeAxis.cpp.svn-base
ChartDateTimeAxis.h.svn-base
ChartDragLineCursor.cpp.svn-base
ChartDragLineCursor.h.svn-base
ChartFont.cpp.svn-base
ChartFont.h.svn-base
ChartGanttSerie.cpp.svn-base
ChartGanttSerie.h.svn-base
ChartGradient.cpp.svn-base
ChartGradient.h.svn-base
ChartGrid.cpp.svn-base
ChartGrid.h.svn-base
ChartLabel.h.svn-base
ChartLabel.inl.svn-base
ChartLegend.cpp.svn-base
ChartLegend.h.svn-base
ChartLineSerie.cpp.svn-base
ChartLineSerie.h.svn-base
ChartLogarithmicAxis.cpp.svn-base
ChartLogarithmicAxis.h.svn-base
ChartMouseListener.h.svn-base
ChartPointsArray.h.svn-base
ChartPointsArray.inl.svn-base
ChartPointsSerie.cpp.svn-base
ChartPointsSerie.h.svn-base
ChartScrollBar.cpp.svn-base
ChartScrollBar.h.svn-base
ChartSerie.cpp.svn-base
ChartSerie.h.svn-base
ChartSerieBase.h.svn-base
ChartSerieBase.inl.svn-base
ChartSeriesMouseListener.h.svn-base
ChartStandardAxis.cpp.svn-base
ChartStandardAxis.h.svn-base
ChartString.h.svn-base
ChartSurfaceSerie.cpp.svn-base
ChartSurfaceSerie.h.svn-base
ChartTitle.cpp.svn-base
ChartTitle.h.svn-base
ChartXYSerie.cpp.svn-base
ChartXYSerie.h.svn-base
PointsOrdering.h.svn-base
tmp
prop-base
props
text-base
ChartBalloonLabel.inl
ChartCtrl_source.zip
ChartLabel.inl
ChartPointsArray.inl
ChartSerieBase.inl
ChartDemo.dsp
ChartDemo.dsw
ColourPicker
.svn
entries
format
prop-base
props
text-base
ColourPicker.cpp.svn-base
ColourPicker.h.svn-base
ColourPopup.cpp.svn-base
ColourPopup.h.svn-base
tmp
prop-base
props
text-base
Doc
html
class_c_chart_axis.png
class_c_chart_balloon_label.png
class_c_chart_bar_serie.png
class_c_chart_candlestick_serie.png
class_c_chart_cross_hair_cursor.png
class_c_chart_cursor.png
class_c_chart_date_time_axis.png
class_c_chart_drag_line_cursor.png
class_c_chart_gantt_serie.png
class_c_chart_label.png
class_c_chart_line_serie.png
class_c_chart_logarithmic_axis.png
class_c_chart_points_serie.png
class_c_chart_serie.png
class_c_chart_serie_base.png
class_c_chart_standard_axis.png
class_c_chart_surface_serie.png
class_c_chart_x_y_serie.png
doxygen.png
tab_b.gif
tab_l.gif
tab_r.gif
res
ChartDemo.ico
ChartCtrl_doxygen.zip
html
class_c_chart_axis.png
class_c_chart_balloon_label.png
class_c_chart_bar_serie.png
class_c_chart_candlestick_serie.png
class_c_chart_cross_hair_cursor.png
class_c_chart_cursor.png
class_c_chart_date_time_axis.png
class_c_chart_drag_line_cursor.png
class_c_chart_gantt_serie.png
class_c_chart_label.png
class_c_chart_line_serie.png
class_c_chart_logarithmic_axis.png
class_c_chart_points_serie.png
class_c_chart_serie.png
class_c_chart_serie_base.png
class_c_chart_standard_axis.png
class_c_chart_surface_serie.png
class_c_chart_x_y_serie.png
doxygen.png
tab_b.gif
tab_l.gif
tab_r.gif
ChartCtrl_source.zip
ChartLabel.inl
ChartPointsArray.inl
ChartSerieBase.inl
ChartBalloonLabel.inl
chartctrl_src.zip
chartctr_demo.zip
ChartDemo.clw
ChartDemo.dsp
ChartDemo.dsw
res
ChartDemo.ico
/*
 *
 *	ChartCandlestickSerie.h
 *
 *	Written by C�dric Moonen (cedric_moonen@hotmail.com)
 *
 *
 *
 *	This code may be used for any non-commercial and commercial purposes in a compiled form.
 *	The code may be redistributed as long as it remains unmodified and providing that the 
 *	author name and this disclaimer remain intact. The sources can be modified WITH the author 
 *	consent only.
 *	
 *	This code is provided without any garanties. I cannot be held responsible for the damage or
 *	the loss of time it causes. Use it at your own risks
 *
 *	An e-mail to notify me that you are using this code is appreciated also.
 *
 *
 */

#pragma once
#include "ChartSerieBase.h"

//! Point structure used as template parameter for candlestick series
struct SChartCandlestickPoint
{
	SChartCandlestickPoint() { }
	SChartCandlestickPoint(double XValue, double LowVal, 
		double HighVal, double OpenVal, double CloseVal):
			XVal(XValue), Low(LowVal), High(HighVal),
				Open(OpenVal), Close(CloseVal) { }

	//! The X value of the point (usually, a time)
	double XVal;
	//! The low market price
	double Low;
	//! The high market price
	double High;
	//! The open market price
	double Open;
	//! The close market price
	double Close;

	//! Returns the X value of the point
	double GetX() const { return XVal; }
	//! Returns the Y value of the point, which is the average between low and high
	double GetY() const { return (Low+High)/2; }
	//! Returns the minimum X value of the point
	double GetXMin() const { return XVal; }
	//! Returns the maximum X value of the point
	double GetXMax() const { return XVal; }
	//! Returns the minimum Y value of the point (the low value)
	double GetYMin() const { return Low; }
	//! Returns the maximum Y value of the point (the high value)
	double GetYMax() const { return High; }
};

//! Specialization of a CChartSerieBase to display a candlestick series.
/**
	Each point in the series has an X value (the time), a high value 
	(the highest market price), a low value (the lowest market price), 
	an open value (the market price at the opening) and a close value 
	(the market price at the closing).
**/
class CChartCandlestickSerie : public CChartSerieBase<SChartCandlestickPoint>
{
public:
	//! Constructor
	CChartCandlestickSerie(CChartCtrl* pParent);
	//! Destructor
	~CChartCandlestickSerie();

	//! Tests if a certain screen point is on the series.
	/**
		@param screenPoint
			The screen point to test
		@param uIndex
			If the point is close to a specific point of the series, its index is stored here.
		@return true if the point is on the series
	**/
	bool IsPointOnSerie(const CPoint& screenPoint, unsigned& uIndex) const;

	//! Adds a new point in the series
	/**
		@param XVal
			The X value of the point (the time)
		@param Low
			The lowest market price 
		@param High
			The highest market price
		@param Open
			The market price at the opening
		@param Close
			The market price at the closing
	**/
	void AddPoint(double XVal, double Low, double High, 
				  double Open, double Close);
	//! Sets the width (in pixels) of all candlestick points in the series
	void SetWidth(int Width);
	//! Returns the width (in pixels) of a point in the series
	int  GetWidth()		{ return m_iCandlestickWidth; }

protected:
	//! Draws the legend icon for the series.
	/**
		@param pDC
			The device context used to draw
		@param rectBitmap
			The rectangle in which to draw the legend icon
	**/
    void DrawLegend(CDC* pDC, const CRect& rectBitmap) const;

	//! Draws the most recent points of the series.
	/**
		This function should only draw the points that were not previously 
		drawn.
		@param pDC
			The device context used to draw
	**/
	void Draw(CDC* pDC);
	//! Redraws the full series.
	/**
		@param pDC
			The device context used to draw
	**/
	void DrawAll(CDC *pDC);

private:
	//! Draws a candle stick point
	void DrawCandleStick(CDC *pDC, SChartCandlestickPoint Point);

	//! The candlestick width
	int m_iCandlestickWidth;

	// Caches the pen and brushes to avoid creating them for each point
	mutable CBrush ShadowBrush;
	mutable CPen NewPen;
	mutable CPen ShadowPen;
	mutable CBrush BrushFill;
	mutable CBrush BrushEmpty;
};

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This article, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)

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About the Author

Cedric Moonen
Engineer
Belgium Belgium
I am a 29 years old guy and I live with my girlfriend in Hoegaarden, little city from Belgium well known for its white beer Smile | :) .
I studied as an industrial engineer in electronics but I oriented myself more towards software development when I started to work.
Currently I am working in a research centre in mechatronica. I mainly develop in C++ but I also do a bit of Java.
When I have so spare time, I like to read (mainly fantasy) and play electric guitar.

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