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Posted 20 Mar 2002


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Scientific charting control

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4.84/5 (122 votes)
17 Jan 20055 min read
Multi-purpose scientific charting control.

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Displaying large amounts of technical data in a chart can be a frustrating task. You can find tons of charting controls with fancy effects and useless features, but when it comes to displaying many curves at once, independently scaled on different axes, most of them fail. Maybe CXGraph is the solution:

CXGraph can display unlimited series of data on multiple axes.

The documentation is sparse, because I do not have the time to write documentation. However, the included demo is hopefully a help in understanding how to use the control.


  • unlimited data series
  • unlimited axes (your monitor is the limit)
  • logarithmic scales
  • autoscaling
  • automatic/manual axis placement
  • nearly every visual aspect can be customized
  • legends
  • bitmaps
  • cursor (add data notation marks by clicking)
  • zoom
  • pan
  • color ranges
  • object selection with the mouse
  • linear trend
  • cubic trend
  • nth order polynomial trend
  • data notation marks
  • moving average (simple, linear, sine-weighted ...)
  • property persistence (save and load properties, data and axes)
  • Support for Windows CE
  • axis markers
  • UNICODE support
  • polygon filling between curves
  • cursor synchronization
  • data editing
  • measuring mode



CXGraphDataSerie& SetData(TDataPoint* pValues, long nCount, int nCurve, int nXAxis, int nYAxis, bool bAutoDelete)Adds/sets a data series.
CXGraphAxis& GetXAxis(int nAxis)Returns reference to specified X-axis.
CXGraphAxis& GetYAxis(int nAxis)Returns reference to specified y-axis.
CXGraphDataSerie& GetCurve(int nCurve)Returns reference to specified curve.
bool SelectCurve(int nCurve)Selects the specified curve.
bool SelectXAxis(int nAxis)Selects the specified x-axis.
bool SelectYAxis(int nAxis)Selects the specified y-axis.
int GetXAxisCount()Returns x-axis count.
int GetYAxisCount()Returns y-axis count.
int GetCurveCount()Returns curve count.
void Zoom()Zoom-mode. User can zoom into the graph with the mouse.
void ResetZoom()Resets all axes to optimal values.
void Pan()Pan-mode. User can pan the graph with the mouse.
void NoOp()Select-mode. User can select objects with the mouse.
void Cursor()Cursor-mode. A cursor is being displayed showing the values at the current mouse position.
void Measure()Measuring mode. User can measure the distance between two data points.
void Edit()Editing mode. User can edit the curve data.
CXGraphLabel& InsertLabel(CString cText)Inserts a text-label. Returns reference to a CXGraphLabel object.
void PrintGraph(CDC *pDC)Prints the graph.
void SetBackColor(COLORREF color)Sets the chart's backcolor.
void SetGraphColor(COLORREF color)Sets the chart's exterior color.
void SetInnerColor(COLORREF color)Sets the chart's interior color.
void SetDoubleBuffer(bool bValue)Sets double buffering on/off.
void SetShowLegend(bool bValue)Sets legend display on/off.
void SetLegendAlignment(EAlignment align)Sets the legend alignment (left, right).
void SetSnapCursor(bool bValue)Sets snap cursor mode (on/off).
void SetInteraction(bool bValue)Enable/disable interaction.
bool GetInteraction()
void SetSnapRange(int nValue)Sets snap cursor range.
bool Save(const CString cFile, UINT nFlags)

Stores chart properties, data and axes. Use one or more of the following values to specify what to be stored:

  • PERSIST_PROPERTIES: store chart properties.
  • PERSIST_DATA: store chart data and axes.
  • PERSIST_OBJECTS: store chart objects (labels, ...).
bool Load(const CString cFile)Loads chart properties, data and axes.
bool SaveBitmap(const CString cFile)Saves the chart as bitmap.
bool DeleteCurve(int nCurve)Deletes the specified curve.
bool DeleteYAxis(int nAxis)Removes the specified y-axis.
bool DeleteXAxis(int nAxis)Removes the specified x-axis.
int GetZoomDepth()Determines the zoom depth (history).
void RestoreLastZoom()Restores the last zoom stage.
void SetBackgroundBitmap(CBitmap* pBitmap, UINT nFlags)Sets a background image.
void InsertBitmap(CRect rect, CBitmapEx* pBitmap)Inserts a bitmap-object.


SetFont(LOGFONT* pLogFont)Sets the label's font.
SetText(CString cText)Sets the label's text.
SetColor(COLORREF color)Sets the label's background color.
SetTextColor(COLORREF color)Sets the label's text color.
SetBorder(bool bValue)Sets the label's border.
SetTransparent(bool bValue)Sets the label's transparency.
SetAlignment(UINT nValue)Sets the label's text alignment.
SetCurve(int nCurve)Links the label to the specified curve.
CString GetText()Returns the label's text.
COLORREF GetColor()Returns the label's background color.
COLORREF GetTextColor()Returns the label's text color.
bool GetBorder()Returns true if label has a border, otherwise false.
bool GetTransparent()Returns true if label is transparent. otherwise false.
UINT GetAlignment()Returns the label's text alignment.
int GetCurve()Returns the label's associated curve (or -1 if not associated).


See source code


See source code




To use this control in your own application, add XGraph10.lib to your project and make sure XGraph10.dll is accessible. Create an instance of CXGraph and call Create on it. Take a look at the sample application for further details.


  • James White - Color button.
  • Chris Maunder, Alexander Bischofberger - Color popup.
  • Dennis Crain (MSDN) - Routines for line-hit testing.
  • Keith Rule - CMemDC.
  • Ishay Sivan (bug fixing).
  • Pavel Klocek (bug fixing).
  • J.G. Hattingh (parts of Device Context Utilities).
  • Jörg Blattner (bug fixing, improvements).

History & Bug fixes

21 Mar 20021.00
  • First release.
25 Mar 20021.01
  • Fixed DateTime-bug in cursor mode.
  • Fixed crash when adding trend or moving average.
17 Apr 20021.02
  • Panning in cursor mode added.
  • Added support for very large and very small numbers.
  • Values greater/less than 10E6/10E-6 are now automatically shown in exponential format.
  • Completely redesigned autoscaling (only for normal axes, DateTime types follow).
  • Added data notation marks.
  • Added Get/Set member functions.
  • Added nth-order-polynomial trend.
20 Sep 20021.03
  • Now compiles under VC7.
  • Load/save for properties/data/object persistence.
  • Lots of bug fixes.
20 Nov 20031.04
  • Added Unicode support.
  • Fixed crash when resizing chart to small dimensions.
  • Corrected tab-order in property pages.
  • Added background bitmaps.
  • Added gradient color ranges.
  • Added axis markers.
  • Added bitmap objects.
13 Jan 20051.05
  • Added support for Windows CE (needs improvement).
  • Logarithmic axes (thanks to ...).
  • Added polygon filling between two curves.
  • Several bugs fixed by Joerg Blattner.
  • Added Cursor-Synchronization.
  • Curve editing mode.
  • Measuring mode.

Known issues

  • Clipping in print preview still doesn't work.


This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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Comments and Discussions

NewsUpdated Version Pin
Davide Spazian4-Dec-17 22:23
Davide Spazian4-Dec-17 22:23 
QuestionCan the Cxgraph show the dynamic curve? Pin
Member 127729975-Oct-16 19:47
Member 127729975-Oct-16 19:47 
GeneralMy vote of 3 Pin
Member 1264163018-Jul-16 17:33
professionalMember 1264163018-Jul-16 17:33 
QuestionC# wrapper Pin
Joel Smit22-Nov-13 2:21
Joel Smit22-Nov-13 2:21 
QuestionLink with VS2008 Pin
CynthiaLiu17-Oct-13 22:18
CynthiaLiu17-Oct-13 22:18 
AnswerRe: Link with VS2008 Pin
phonio25-May-15 5:22
professionalphonio25-May-15 5:22 
QuestionAccuracy of Graphs Pin
sseredn25-Feb-13 18:59
sseredn25-Feb-13 18:59 
QuestionCompiling with Visual Studio 2010 Pin
Jost Eberbach13-Dec-12 22:44
Jost Eberbach13-Dec-12 22:44 
AnswerRe: Compiling with Visual Studio 2010 Pin
soft_raider5-Jun-13 2:26
professionalsoft_raider5-Jun-13 2:26 
GeneralRe: Compiling with Visual Studio 2010 Pin
CynthiaLiu17-Oct-13 20:06
CynthiaLiu17-Oct-13 20:06 
AnswerRe: Compiling with Visual Studio 2010 Pin
Jay J. Rhee6-Dec-16 22:52
Jay J. Rhee6-Dec-16 22:52 
QuestionHow can I put text labels on an axis? Pin
Tom Paronis31-Oct-12 12:50
Tom Paronis31-Oct-12 12:50 
QuestionLicense Pin
Yusein Ali28-Feb-12 22:57
Yusein Ali28-Feb-12 22:57 
AnswerRe: License Pin
xawari29-Oct-12 4:56
xawari29-Oct-12 4:56 
GeneralRe: License Pin
Tom Paronis1-Nov-12 5:56
Tom Paronis1-Nov-12 5:56 
GeneralRe: License Pin
xawari18-Nov-12 3:46
xawari18-Nov-12 3:46 
GeneralRe: License Pin
Tom Paronis18-Nov-12 5:59
Tom Paronis18-Nov-12 5:59 
Suggestionlook here for UPDATED sources! Pin
xawari20-Feb-12 6:54
xawari20-Feb-12 6:54 
GeneralRe: look here for UPDATED sources! Pin
phonio25-May-15 15:52
professionalphonio25-May-15 15:52 
GeneralRe: look here for UPDATED sources! Pin
Rocking Horse Cowboy16-Feb-16 11:08
Rocking Horse Cowboy16-Feb-16 11:08 
Question64 bit compatibility ? Pin
beauwlf12-Jul-11 23:02
beauwlf12-Jul-11 23:02 
GeneralMy vote of 5 Pin
bigbigmonkey17-May-11 22:37
bigbigmonkey17-May-11 22:37 
GeneralExcellent Pin
sisixiao12-Mar-11 15:35
sisixiao12-Mar-11 15:35 
Generalquestion on your trending algorithms Pin
Michael Eber24-Jun-10 5:28
Michael Eber24-Jun-10 5:28 
QuestionHow To Port The Control To WINDOWS CE Pin
ten319830-May-10 16:21
ten319830-May-10 16:21 

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