Multiple Axes

The following is the command line version of the code in "cppdemo/multiaxes". 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 the chart
    double data0[] = {1700, 3900, 2900, 3800, 4100, 4600, 2900, 4100, 4400, 5700, 5900, 5200, 3700,
        3400, 5100, 5600, 5600, 6000, 7000, 7600, 6300, 6700, 7500, 6400, 8800};
    const int data0_size = (int)(sizeof(data0)/sizeof(*data0));
    double data1[] = {500, 550, 670, 990, 820, 730, 800, 720, 730, 790, 860, 800, 840, 680, 740,
        890, 680, 790, 730, 770, 840, 820, 800, 840, 670};
    const int data1_size = (int)(sizeof(data1)/sizeof(*data1));
    double data2[] = {46, 68, 35, 33, 38, 20, 12, 18, 15, 23, 30, 24, 28, 15, 21, 26, 46, 42, 38,
        25, 23, 32, 24, 20, 25};
    const int data2_size = (int)(sizeof(data2)/sizeof(*data2));
    double data3[] = {0.84, 0.82, 0.82, 0.38, 0.25, 0.52, 0.54, 0.52, 0.38, 0.51, 0.46, 0.29, 0.5,
        0.55, 0.47, 0.34, 0.52, 0.33, 0.21, 0.3, 0.25, 0.15, 0.18, 0.22, 0.14};
    const int data3_size = (int)(sizeof(data3)/sizeof(*data3));

    // Labels for the chart
    const char* labels[] = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "10", "11", "12",
        "13", "14", "15", "16", "17", "18", "19", "20", "21", "22", "23", "24"};
    const int labels_size = (int)(sizeof(labels)/sizeof(*labels));

    // Create a XYChart object of size 600 x 360 pixels. Use a vertical gradient color from sky blue
    // (aaccff) to white (ffffff) as background. Set border to grey (888888). Use rounded corners.
    // Enable soft drop shadow.
    XYChart* c = new XYChart(600, 360);
    c->setBackground(c->linearGradientColor(0, 0, 0, c->getHeight(), 0xaaccff, 0xffffff), 0x888888);
    c->setRoundedFrame();
    c->setDropShadow();

    // Add a title box to the chart using 15pt Arial Bold Italic font. Set top margin to 16 pixels.
    TextBox* title = c->addTitle("Multiple Axes Demonstration", "Arial Bold Italic", 15);
    title->setMargin(0, 0, 16, 0);

    // Set the plotarea at (100, 80) and of size 400 x 230 pixels, with white (ffffff) background.
    // Use grey #(aaaaa) dotted lines for both horizontal and vertical grid lines.
    c->setPlotArea(100, 80, 400, 230, 0xffffff, -1, -1, c->dashLineColor(0xaaaaaa, Chart::DotLine),
        -1);

    // Add a legend box with the bottom center anchored at (300, 80) (top center of the plot area).
    // Use horizontal layout, and 8 points Arial Bold font. Set background and border to
    // transparent.
    LegendBox* legendBox = c->addLegend(300, 80, false, "Arial Bold", 8);
    legendBox->setAlignment(Chart::BottomCenter);
    legendBox->setBackground(Chart::Transparent, Chart::Transparent);

    // Set the labels on the x axis.
    c->xAxis()->setLabels(StringArray(labels, labels_size));

    // Display 1 out of 3 labels on the x-axis.
    c->xAxis()->setLabelStep(3);

    // Add a title to the x-axis
    c->xAxis()->setTitle("Hour of Day");

    // Add a title on top of the primary (left) y axis.
    c->yAxis()->setTitle("Power\n(Watt)")->setAlignment(Chart::TopLeft2);
    // Set the axis, label and title colors for the primary y axis to red (c00000) to match the
    // first data set
    c->yAxis()->setColors(0xcc0000, 0xcc0000, 0xcc0000);

    // Add a title on top of the secondary (right) y axis.
    c->yAxis2()->setTitle("Load\n(Mbps)")->setAlignment(Chart::TopRight2);
    // Set the axis, label and title colors for the secondary y axis to green (00800000) to match
    // the second data set
    c->yAxis2()->setColors(0x008000, 0x008000, 0x008000);

    // Add the third y-axis at 50 pixels to the left of the plot area
    Axis* leftAxis = c->addAxis(Chart::Left, 50);
    // Add a title on top of the third y axis.
    leftAxis->setTitle("Temp\n(C)")->setAlignment(Chart::TopLeft2);
    // Set the axis, label and title colors for the third y axis to blue (0000cc) to match the third
    // data set
    leftAxis->setColors(0x0000cc, 0x0000cc, 0x0000cc);

    // Add the fouth y-axis at 50 pixels to the right of the plot area
    Axis* rightAxis = c->addAxis(Chart::Right, 50);
    // Add a title on top of the fourth y axis.
    rightAxis->setTitle("Error\n(%)")->setAlignment(Chart::TopRight2);
    // Set the axis, label and title colors for the fourth y axis to purple (880088) to match the
    // fourth data set
    rightAxis->setColors(0x880088, 0x880088, 0x880088);

    // Add a line layer to for the first data set using red (c00000) color, with a line width of 2
    // pixels
    LineLayer* layer0 = c->addLineLayer(DoubleArray(data0, data0_size), 0xcc0000, "Power");
    layer0->setLineWidth(2);

    // Add a line layer to for the second data set using green (00c0000) color, with a line width of
    // 2 pixels. Bind the layer to the secondary y-axis.
    LineLayer* layer1 = c->addLineLayer(DoubleArray(data1, data1_size), 0x008000, "Load");
    layer1->setLineWidth(2);
    layer1->setUseYAxis2();

    // Add a line layer to for the third data set using blue (0000cc) color, with a line width of 2
    // pixels. Bind the layer to the third y-axis.
    LineLayer* layer2 = c->addLineLayer(DoubleArray(data2, data2_size), 0x0000cc, "Temperature");
    layer2->setLineWidth(2);
    layer2->setUseYAxis(leftAxis);

    // Add a line layer to for the fourth data set using purple (880088) color, with a line width of
    // 2 pixels. Bind the layer to the fourth y-axis.
    LineLayer* layer3 = c->addLineLayer(DoubleArray(data3, data3_size), 0x880088, "Error Rate");
    layer3->setLineWidth(2);
    layer3->setUseYAxis(rightAxis);

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

    //free up resources
    delete c;

    return 0;
}