4 Quadrant Chart

The following is the command line version of the code in "cppdemo/fourq". 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[])
{
    // XY points for the scatter chart
    double dataX0[] = {10, 15, 6, -12, 14, -8, 13, -13, 16, 12, 10.5};
    const int dataX0_size = (int)(sizeof(dataX0)/sizeof(*dataX0));
    double dataY0[] = {130, 150, 80, 110, -110, -105, -130, 115, -170, 125, 125};
    const int dataY0_size = (int)(sizeof(dataY0)/sizeof(*dataY0));

    double dataX1[] = {6, 7, -4, 3.5, 7, 8, -9, -10, -12, 11, 8};
    const int dataX1_size = (int)(sizeof(dataX1)/sizeof(*dataX1));
    double dataY1[] = {65, -40, -40, 45, -70, -80, 80, 10, -100, 105, 60};
    const int dataY1_size = (int)(sizeof(dataY1)/sizeof(*dataY1));

    double dataX2[] = {-10, -12, 11, 8, 6, 12, -4, 3.5, 7, 8, -9};
    const int dataX2_size = (int)(sizeof(dataX2)/sizeof(*dataX2));
    double dataY2[] = {65, -80, -40, 45, -70, -80, 80, 90, -100, 105, 60};
    const int dataY2_size = (int)(sizeof(dataY2)/sizeof(*dataY2));

    // Create a XYChart object of size 600 x 300 pixels, with a light blue (ccccff) background, a
    // black border, and 1 pixel 3D border effect
    XYChart* c = new XYChart(600, 480, 0xccccff, 0x000000, 1);

    // Add a title box to the chart using 16pt Arial Bold Italic font, with white text on deep blue
    // background
    c->addTitle("Four Quadrant Chart Demonstration", "Arial Bold Italic", 16, 0xffffff
        )->setBackground(0x000080);

    // Set the plotarea at (20, 60) and of size 560 x 360 pixels, with grey (808080) border, and
    // light grey (c0c0c0) horizontal and vertical grid lines. Set 4 quadrant coloring, where the
    // colors of the quadrants alternate between lighter and deeper grey (dddddd/eeeeee)
    c->setPlotArea(20, 60, 560, 360, -1, -1, 0x808080, 0xc0c0c0, 0xc0c0c0)->set4QBgColor(0xdddddd,
        0xeeeeee, 0xdddddd, 0xeeeeee);

    // Set 4 quadrant mode, with both x and y axes symetrical around the origin
    c->setAxisAtOrigin(Chart::XYAxisAtOrigin, Chart::XAxisSymmetric + Chart::YAxisSymmetric);

    // Add a legend box at (300, 460) (bottom center of the chart) with horizontal layout. Use 8pt
    // Arial Bold font.
    LegendBox* legendBox = c->addLegend(300, 460, false, "Arial Bold", 8);
    legendBox->setAlignment(Chart::BottomCenter);

    // Set legend box background to light grey (dddddd) with a black border
    legendBox->setBackground(0xdddddd, 0);

    // Set left/right margin to 20 pixels and top/bottom margin to 5 pixels
    legendBox->setMargin(20, 20, 5, 5);

    // Add a titles to axes
    c->xAxis()->setTitle("Alpha Index");
    c->yAxis()->setTitle("Beta Index");

    // Set axes width to 2 pixels
    c->xAxis()->setWidth(2);
    c->yAxis()->setWidth(2);

    // Add scatter layer, using 15 pixels red (ff33333) X shape symbols
    c->addScatterLayer(DoubleArray(dataX0, dataX0_size), DoubleArray(dataY0, dataY0_size),
        "Group A", Chart::Cross2Shape(), 15, 0xff3333);

    // Add scatter layer, using 15 pixels green (33ff33) 6-sided polygon symbols
    c->addScatterLayer(DoubleArray(dataX1, dataX1_size), DoubleArray(dataY1, dataY1_size),
        "Group B", Chart::PolygonShape(6), 15, 0x33ff33);

    // Add scatter layer, using 15 pixels blue (3333ff) triangle symbols
    c->addScatterLayer(DoubleArray(dataX2, dataX2_size), DoubleArray(dataY2, dataY2_size),
        "Group C", Chart::TriangleSymbol, 15, 0x3333ff);

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

    //free up resources
    delete c;

    return 0;
}