Simple Pie Chart

This example demonstrates the basic steps in creating pie charts.

Create a pie chart object using PieChart.PieChart.
Specify the center and size of the pyramid using PieChart.setPieSize.
Specify the data used to draw the pie using PieChart.setData.
Pass the chart to the CChartViewer for display using CChartViewer.setChart (MFC version) or QChartViewer.setChart (Qt version), or generate the chart as an image file using BaseChart.makeChart (Command Line version).
Generate tool tips for the chart using BaseChart.getHTMLImageMap. (MFC/Qt version)

The following is the command line version of the code in "cppdemo/simplepie". The MFC version of the code is in "mfcdemo/mfcdemo". The Qt Widgets version of the code is in "qtdemo/qtdemo". The QML/Qt Quick version of the code is in "qmldemo/qmldemo".

#include "chartdir.h"

int main(int argc, char *argv[])
{
    // The data for the pie chart
    double data[] = {25, 18, 15, 12, 8, 30, 35};
    const int data_size = (int)(sizeof(data)/sizeof(*data));

    // The labels for the pie chart
    const char* labels[] = {"Labor", "Licenses", "Taxes", "Legal", "Insurance", "Facilities",
        "Production"};
    const int labels_size = (int)(sizeof(labels)/sizeof(*labels));

    // Create a PieChart object of size 360 x 300 pixels
    PieChart* c = new PieChart(360, 300);

    // Set the center of the pie at (180, 140) and the radius to 100 pixels
    c->setPieSize(180, 140, 100);

    // Set the pie data and the pie labels
    c->setData(DoubleArray(data, data_size), StringArray(labels, labels_size));

    // Output the chart
    c->makeChart("simplepie.png");

    //free up resources
    delete c;

    return 0;
}