Pie Chart Control

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• Download demo project - 118 Kb

Introduction

This control class CPieChartCtrl is derived from CWnd. The purpose is to create a simple 2D pie chart in a dialog. The code is created and compiled with Visual C++ 5.0 SP3 under Windows 98.

How to use

1. Use the MS Visual C++ dialog editor to place a custom control on the dialog, and enter "PIE_CHART_CTRL" as the Class name.
   
   
2. Add a CPieChartCtrl class member in the header file

   #include "PieChartCtrl.h"
   
   ...
   CPieChartCtrl m_wndChart;

3. Subclass the class member with the control in InitDialog()

   m_wndChart.SubclassDlgItem(IDC_PIECHART1, this); //IDC_PIECHART1 is the control ID

4. Use these functions to edit to chart

   // SetTitle(CString) - Set the chart title text
   
   m_wndChart.SetTitle("Chart Title");
   
   // Reset() - Reset the chart and delete all pieces
   
   m_wndChart.Reset();
   
   // AddPiece(COLORREF colorBack, COLORREF colorText, 
   
   //            int nAngle, int strInfo = "");
   
   // Add one piece into the chart
   
   m_wndChart.AddPiece(colorBack, colorText, nAngle, strInfo);

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