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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);

Last updated: 12 August 1998

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