Concentric Donut Chart

The following is the command line version of the code in "cppdemo/concentric". 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[])
{
    // Data for outer ring
    double data[] = {88, 124, 96};
    const int data_size = (int)(sizeof(data)/sizeof(*data));

    // Data for inner ring
    double data2[] = {77, 87, 45};
    const int data2_size = (int)(sizeof(data2)/sizeof(*data2));

    // Labels for the sectors
    const char* labels[] = {"Hardware", "Software", "Services"};
    const int labels_size = (int)(sizeof(labels)/sizeof(*labels));

    // Colors for the sectors
    int colors[] = {0xff9999, 0x9999ff, 0x66ff66};
    const int colors_size = (int)(sizeof(colors)/sizeof(*colors));

    //
    // Create the main chart, which contains the chart title, the outer ring, and the legend box
    //

    // Create a PieChart object of size 450 x 360 pixels, with transparent background
    PieChart* c = new PieChart(450, 360);

    // Add a title to the chart with 18pt Times Bold Italic font
    c->addTitle("Concentric Donut Chart", "Times New Roman Bold Italic", 18);

    // Set donut center at (160, 200), and outer/inner radii as 150/100 pixels
    c->setDonutSize(160, 200, 150, 100);

    // Add a label at the bottom-right corner of the ring to label the outer ring Use 12pt Arial
    // Bold Italic font in white (ffffff) color, on a green (008800) background, with soft lighting
    // effect and 5 pixels rounded corners
    TextBox* t = c->addText(260, 300, " Year 2006 ", "Arial Bold Italic", 12, 0xffffff);
    t->setBackground(0x008800, Chart::Transparent, Chart::softLighting());
    t->setRoundedCorners(5);

    // Set the legend box at (320, 50) with 12pt Arial Bold Italic font, with no border
    c->addLegend(320, 50, true, "Arial Bold Italic", 13)->setBackground(Chart::Transparent,
        Chart::Transparent);

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

    // Set the pie colors
    c->setColors(Chart::DataColor, IntArray(colors, colors_size));

    // Set pie border color to white (ffffff)
    c->setLineColor(0xffffff);

    // Set pie label to value in $###M format, percentage in (##.#%) format, in two lines.
    c->setLabelFormat("${value}M<*br*>({percent|1}%)");

    // Use 10pt Airal Bold for the sector labels
    c->setLabelStyle("Arial Bold", 10);

    // Set the label position to -25 pixels from the sector (which would be internal to the sector)
    c->setLabelPos(-25);

    //
    // Create the inner ring.
    //

    // Create a PieChart object of size 280 x 320 pixels, with transparent background
    PieChart* c2 = new PieChart(280, 320, Chart::Transparent);

    // Set donut center at (110, 110), and outer/inner radii as 100/50 pixels
    c2->setDonutSize(110, 110, 100, 50);

    // Add a label at the center of the ring to label the inner ring. Use 12pt Arial Bold Italic
    // font in white (ffffff) color, on a deep blue (0000cc) background, with soft lighting effect
    // and 5 pixels rounded corners
    TextBox* t2 = c2->addText(110, 110, " Year 2005 ", "Arial Bold Italic", 12, 0xffffff,
        Chart::Center);
    t2->setBackground(0x0000cc, Chart::Transparent, Chart::softLighting());
    t2->setRoundedCorners(5);

    // Set the pie data and the pie labels
    c2->setData(DoubleArray(data2, data2_size), StringArray(labels, labels_size));

    // Set the pie colors
    c2->setColors(Chart::DataColor, IntArray(colors, colors_size));

    // Set pie border color to white (ffffff)
    c2->setLineColor(0xffffff);

    // Set pie label to value in $###M format, percentage in (##.#%) format, in two lines.
    c2->setLabelFormat("${value}M<*br*>({percent|1}%)");

    // Use 10pt Airal Bold for the sector labels
    c2->setLabelStyle("Arial Bold", 10);

    // Set the label position to -25 pixels from the sector (which would be internal to the sector)
    c2->setLabelPos(-25);

    // merge the inner ring into the outer ring at (50, 90)
    c->makeChart()->merge(c2->makeChart(), 50, 90, Chart::TopLeft, 0);

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

    //free up resources
    delete c;
    delete c2;

    return 0;
}