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NSChart Control

, 7 Aug 2004
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This control creates a chart in a dialog with Pie and Bar styles.

Sample Image - nschart.gif

Sample Image - nschart.gif

Introduction

The CNSChartCtrl control class is derived from CWnd. The purpose is to create pie and bar charts in a dialog (also in a view) with editable fill colors and values, in runtime. Originally, the source code and project was written and compiled with Visual C++ 6.0 SP5 under Windows 98; it also was run in later versions.

It is an alternative to many tools available that perform similar tasks.

How to use

  1. To create a new NSChart control, use the MS Visual C++ dialog editor, insert a custom control on the dialog, and set "MFC_NSChartCtrl" as the Class name. The caption field is used to set the title of the chart.
  2. Create an instance of CNSChartCtrl in the dialog class:
    #include "NSChartCtrl.h"
    ...
    CNSChartCtrl m_chart
  3. Subclass the class member with the control in InitDialog():
    m_chart.SubclassDlgItem(IDC_CUSTOM1,this);
  4. Initialize the control colors, and add the elements in the InitDialog() function or any,
    m_chart.PrepareColors(CNSChartCtrl::GrayScale); //Colors
    m_chart.AddValue(10,"One");
    m_chart.AddValue(20,"Two");
    m_chart.AddValue(90,"Three");
    m_chart.AddValue(30,"Four");
    m_chart.AddValue(40,"Five");
    m_chart.AddValue(20,"Six")
  5. Run!

Customizing colors and patterns

The NSChart control uses an array of patterns to fill the sectors and bars. To add a new pattern or color, use the AddSolidBrush(COLORREF) or AddBrush(COLORREF).

m_chart.ResetColors();
m_chart.AddSolidBrush(0x000000FF);
m_chart.AddSolidBrush(RGB(255,0,255));
m_chart.AddBrush(m_pBrush); // pre created brush

Using the Notify Code for Selection Items

The NSChartCtrl notifies you when you have clicked in one sector or bar (according to the case) with information about the selected value. The notify code is NSCS_SELECTEDITEM. For use, it needs to add the necessary code.

Declare the function that will be called from ON_NOTIFY in the AFX_MSG block.

class CYourDialog : public CDialog
{
   ...
      //{{AFX_MSG(CYourDialog)
      ...
      afx_msg void OnChartSelectedItem(NMHDR* pNMHDR, LRESULT* pResult);
      ...
      //}}AFX_MSG
   ...
};
void CYourDialog::OnChartSelectedItem(NMHDR* pNMHDR, LRESULT* pResult)
{
   LPNMCHARTCTRL nmchart = (LPNMCHARTCTRL)pNMHDR;
   if(nmchart->iItem >= 0 )
   {
      //... have selected item
   }
   *pResult = FALSE;
}

Declare the notify message in MESSAGE_MAP block:

BEGIN_MESSAGE_MAP(CYourDialog, CDialog )
   //{{AFX_MSG_MAP(CYourDialog)
   ...
   ON_NOTIFY(NSCS_SELECTEDITEM, IDC_CUSTOM_CTRL, OnChartSelectedItem)
   ...
END_MESSAGE_MAP()

If the control is created in a CView, change IDC_CUSTOM_CTRL with 0.

History

  • 25 Jun 2004 - 1.0.1
    • Initial release!
  • 02 Aug 2004 - 1.1.0
    • Fixed some drawing problems.
    • Added methods to modify and delete items.
    • Added Notify Messages with HitTest method.

License

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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About the Author

Ivan Cachicatari
Web Developer
Peru Peru
Ivan Cachicatari is an student of Computer Sciense in Peru.
 
I'm webmaster of the latin developers comunity (in my free time)
Latindevelopers.com
 
Recently I have a personal blog (spanish), sonn in english. click on: Ivan Cachicatari's Blog

Comments and Discussions

 
GeneralMy vote of 5 PinmemberOscar Huanca4-Oct-12 6:27 
Generalcompile errors PinmemberEric-staal27-Feb-07 3:42 
QuestionHow to save the chart to an image file? PinmemberLuo Pei'en24-Aug-06 20:57 
Generalwow Pinmemberpeysy23-Aug-06 7:41 
QuestionHOw can i add scrolling functionality? PinmemberAmit j Patil18-Jul-06 2:57 
GeneralGood but still a bug found Pinmemberxwq197520-Mar-06 22:06 
Generallicence Pinmembercmaryus31-Oct-05 3:21 
GeneralScrolling support added Pinmemberaib163845-Sep-05 6:25 
GeneralRe: Scrolling support added Pinmembermyhawk22-Sep-07 6:01 
Generalanother chart PinsussAnonymous29-Aug-05 8:39 
Generalnice control Pinmemberyccheok2-Aug-05 22:06 
Generalhttp://wieler-forum.nl/car-donations--car-donation-virginia/ Pinsusshard . local as Using click File Bar24-Jul-05 17:11 
GeneralSaving the graph PinsussAnonymous7-Jun-05 12:12 
GeneralResize fix PinsussPatrik Strömstedt28-Mar-05 22:34 
Generalvery good. PinmemberMax Santos25-Mar-05 12:52 
GeneralRe: very good. Pinmembernavi200030-May-05 0:32 
GeneralNegative Values Pinmembermattfaramir3312-Mar-05 5:22 
GeneralCScrollView PinsussFayezElFar1-Mar-05 5:59 
GeneralRe: CScrollView PinmemberFayezElFar1-Mar-05 6:15 
Generalbug on this Ns chart !! Pinmemberchunghansu2-Nov-04 22:32 
QuestionHow do I create Bar Chart using MFC...? Pinmemberpubududilena1-Nov-04 18:04 
GeneralSmall modifications Pinmembernavi20001-Oct-04 2:48 
GeneralRe: Small modifications Pinmembermarkusha27-May-05 22:00 
GeneralBad scale on vertical axis ! PinmemberKochise25-Jul-04 22:57 
GeneralRe: Bad scale on vertical axis ! PinmemberIvan Cachicatari26-Jul-04 4:51 
GeneralRe: Bad scale on vertical axis ! Pinmemberdropperkk1-Apr-06 15:56 
GeneralRe: Bad scale on vertical axis ! Pinmembernavi200029-Sep-04 5:24 

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