ChartDirector 6.0 (C++ Edition)

Stacked Radar Chart




This example demonstrates a stacked radar chart.

This example is similar to the previous Multi-Radar Chart example, except the data are stacked before passing to ChartDirector.

Source Code Listing

[The following code is available in "cppdemo/stackradar". A MFC version of the code is available in "mfcdemo/mfcdemo" (Windows edition only). A QT version of the code is available in "qtdemo/qtdemo".]
#include "chartdir.h"

int main(int argc, char *argv[])
{
    // The data for the chart
    double data0[] = {100, 100, 100, 100, 100};
    double data1[] = {90, 85, 85, 80, 70};
    double data2[] = {80, 65, 65, 75, 45};

    // The labels for the chart
    const char *labels[] = {"Population<*br*><*font=arial.ttf*>6 millions",
        "GDP<*br*><*font=arial.ttf*>120 billions", "Export<*br*><*font=arial.ttf*>25 billions",
        "Import<*br*><*font=arial.ttf*>24 billions",
        "Investments<*br*><*font=arial.ttf*>20 billions"};

    // Create a PolarChart object of size 480 x 460 pixels. Set background color to silver, with 1
    // pixel 3D border effect
    PolarChart *c = new PolarChart(480, 460, Chart::silverColor(), 0x000000, 1);

    // Add a title to the chart using 15pt Times Bold Italic font. The title text is white (ffffff)
    // on a deep green (008000) background
    c->addTitle("Economic Growth", "timesbi.ttf", 15, 0xffffff)->setBackground(0x008000);

    // Set plot area center at (240, 270), with 150 pixels radius
    c->setPlotArea(240, 270, 150);

    // Use 1 pixel width semi-transparent black (c0000000) lines as grid lines
    c->setGridColor(0xc0000000, 1, 0xc0000000, 1);

    // Add a legend box at top-center of plot area (240, 35) using horizontal layout. Use 10pt Arial
    // Bold font, with silver background and 1 pixel 3D border effect.
    LegendBox *b = c->addLegend(240, 35, false, "arialbd.ttf", 10);
    b->setAlignment(Chart::TopCenter);
    b->setBackground(Chart::silverColor(), Chart::Transparent, 1);

    // Add area layers of different colors to represent the data
    c->addAreaLayer(DoubleArray(data0, (int)(sizeof(data0) / sizeof(data0[0]))), 0xcc8880,
        "Year 2004");
    c->addAreaLayer(DoubleArray(data1, (int)(sizeof(data1) / sizeof(data1[0]))), 0xffd080,
        "Year 1994");
    c->addAreaLayer(DoubleArray(data2, (int)(sizeof(data2) / sizeof(data2[0]))), 0xa0bce0,
        "Year 1984");

    // Set the labels to the angular axis as spokes.
    c->angularAxis()->setLabels(StringArray(labels, (int)(sizeof(labels) / sizeof(labels[0]))));

    // Set radial axis from 0 - 100 with a tick every 20 units
    c->radialAxis()->setLinearScale(0, 100, 20);

    // Just show the radial axis as a grid line. Hide the axis labels by setting the label color to
    // Transparent
    c->radialAxis()->setColors(0xc0000000, Chart::Transparent);

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

    //free up resources
    delete c;
    return 0;
}