Bubble XY Scaling

The following is the command line version of the code in "cppdemo/bubblescale". 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 XY points for the bubble chart. The bubble chart has independent bubble size on the X and
    // Y direction.
    double dataX0[] = {1000, 1500, 1700};
    const int dataX0_size = (int)(sizeof(dataX0)/sizeof(*dataX0));
    double dataY0[] = {25, 20, 65};
    const int dataY0_size = (int)(sizeof(dataY0)/sizeof(*dataY0));
    double dataZX0[] = {500, 200, 600};
    const int dataZX0_size = (int)(sizeof(dataZX0)/sizeof(*dataZX0));
    double dataZY0[] = {15, 30, 20};
    const int dataZY0_size = (int)(sizeof(dataZY0)/sizeof(*dataZY0));

    double dataX1[] = {500, 1000, 1300};
    const int dataX1_size = (int)(sizeof(dataX1)/sizeof(*dataX1));
    double dataY1[] = {35, 50, 75};
    const int dataY1_size = (int)(sizeof(dataY1)/sizeof(*dataY1));
    double dataZX1[] = {800, 300, 500};
    const int dataZX1_size = (int)(sizeof(dataZX1)/sizeof(*dataZX1));
    double dataZY1[] = {8, 27, 25};
    const int dataZY1_size = (int)(sizeof(dataZY1)/sizeof(*dataZY1));

    double dataX2[] = {150, 300};
    const int dataX2_size = (int)(sizeof(dataX2)/sizeof(*dataX2));
    double dataY2[] = {20, 60};
    const int dataY2_size = (int)(sizeof(dataY2)/sizeof(*dataY2));
    double dataZX2[] = {160, 400};
    const int dataZX2_size = (int)(sizeof(dataZX2)/sizeof(*dataZX2));
    double dataZY2[] = {30, 20};
    const int dataZY2_size = (int)(sizeof(dataZY2)/sizeof(*dataZY2));

    // Create a XYChart object of size 450 x 420 pixels
    XYChart* c = new XYChart(450, 420);

    // Set the plotarea at (55, 65) and of size 350 x 300 pixels, with a light grey border
    // (0xc0c0c0). Turn on both horizontal and vertical grid lines with light grey color (0xc0c0c0)
    c->setPlotArea(55, 65, 350, 300, -1, -1, 0xc0c0c0, 0xc0c0c0, -1);

    // Add a legend box at (50, 30) (top of the chart) with horizontal layout. Use 12pt Times Bold
    // Italic font. Set the background and border color to Transparent.
    c->addLegend(50, 30, false, "Times New Roman Bold Italic", 12)->setBackground(Chart::Transparent
        );

    // Add a title to the chart using 18pt Times Bold Itatic font.
    c->addTitle("Plasma Battery Comparison", "Times New Roman Bold Italic", 18);

    // Add titles to the axes using 12pt Arial Bold Italic font
    c->yAxis()->setTitle("Operating Current", "Arial Bold Italic", 12);
    c->xAxis()->setTitle("Operating Voltage", "Arial Bold Italic", 12);

    // Set the axes line width to 3 pixels
    c->xAxis()->setWidth(3);
    c->yAxis()->setWidth(3);

    // Add (dataX0, dataY0) as a standard scatter layer, and also as a "bubble" scatter layer, using
    // circles as symbols. The "bubble" scatter layer has symbol size modulated by (dataZX0,
    // dataZY0) using the scale on the x and y axes.
    c->addScatterLayer(DoubleArray(dataX0, dataX0_size), DoubleArray(dataY0, dataY0_size),
        "Vendor A", Chart::CircleSymbol, 9, 0xff3333, 0xff3333);
    c->addScatterLayer(DoubleArray(dataX0, dataX0_size), DoubleArray(dataY0, dataY0_size), "",
        Chart::CircleSymbol, 9, 0x80ff3333, 0x80ff3333)->setSymbolScale(DoubleArray(dataZX0,
        dataZX0_size), Chart::XAxisScale, DoubleArray(dataZY0, dataZY0_size), Chart::YAxisScale);

    // Add (dataX1, dataY1) as a standard scatter layer, and also as a "bubble" scatter layer, using
    // squares as symbols. The "bubble" scatter layer has symbol size modulated by (dataZX1,
    // dataZY1) using the scale on the x and y axes.
    c->addScatterLayer(DoubleArray(dataX1, dataX1_size), DoubleArray(dataY1, dataY1_size),
        "Vendor B", Chart::SquareSymbol, 7, 0x3333ff, 0x3333ff);
    c->addScatterLayer(DoubleArray(dataX1, dataX1_size), DoubleArray(dataY1, dataY1_size), "",
        Chart::SquareSymbol, 9, 0x803333ff, 0x803333ff)->setSymbolScale(DoubleArray(dataZX1,
        dataZX1_size), Chart::XAxisScale, DoubleArray(dataZY1, dataZY1_size), Chart::YAxisScale);

    // Add (dataX2, dataY2) as a standard scatter layer, and also as a "bubble" scatter layer, using
    // diamonds as symbols. The "bubble" scatter layer has symbol size modulated by (dataZX2,
    // dataZY2) using the scale on the x and y axes.
    c->addScatterLayer(DoubleArray(dataX2, dataX2_size), DoubleArray(dataY2, dataY2_size),
        "Vendor C", Chart::DiamondSymbol, 9, 0x00ff00, 0x00ff00);
    c->addScatterLayer(DoubleArray(dataX2, dataX2_size), DoubleArray(dataY2, dataY2_size), "",
        Chart::DiamondSymbol, 9, 0x8033ff33, 0x8033ff33)->setSymbolScale(DoubleArray(dataZX2,
        dataZX2_size), Chart::XAxisScale, DoubleArray(dataZY2, dataZY2_size), Chart::YAxisScale);

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

    //free up resources
    delete c;

    return 0;
}