ChartDirector Ver 4.1 (C++ Edition)

Multi Radar Chart




This example demonstrates a radar chart with two layers and a number of chart formatting effects.

Source Code Listing

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

int main(int argc, char *argv[])
{
    // The data for the chart
    double data0[] = {90, 60, 85, 75, 55};
    double data1[] = {60, 80, 70, 80, 85};

    // The labels for the chart
    const char *labels[] = {"Speed", "Reliability", "Comfort", "Safety", "Efficiency"
        };

    // Create a PolarChart object of size 480 x 380 pixels. Set background color to
    // gold, with 1 pixel 3D border effect
    PolarChart *c = new PolarChart(480, 380, Chart::goldColor(), 0x000000, 1);

    // Add a title to the chart using 15 pts Times Bold Italic font. The title text
    // is white (ffffff) on a deep blue (000080) background
    c->addTitle("Space Travel Vehicles Compared", "timesbi.ttf", 15, 0xffffff
        )->setBackground(0x000080);

    // Set plot area center at (240, 210), with 150 pixels radius, and a white
    // (ffffff) background.
    c->setPlotArea(240, 210, 150, 0xffffff);

    // Add a legend box at top right corner (470, 35) using 10 pts Arial Bold font.
    // Set the background to silver, with 1 pixel 3D border effect.
    LegendBox *b = c->addLegend(470, 35, true, "arialbd.ttf", 10);
    b->setAlignment(Chart::TopRight);
    b->setBackground(Chart::silverColor(), Chart::Transparent, 1);

    // Add an area layer to the chart using semi-transparent blue (0x806666cc). Add a
    // blue (0x6666cc) line layer using the same data with 3 pixel line width to
    // highlight the border of the area.
    c->addAreaLayer(DoubleArray(data0, sizeof(data0)/sizeof(data0[0])), 0x806666CC,
        "Model Saturn");
    c->addLineLayer(DoubleArray(data0, sizeof(data0)/sizeof(data0[0])), 0x6666cc
        )->setLineWidth(3);

    // Add an area layer to the chart using semi-transparent red (0x80cc6666). Add a
    // red (0xcc6666) line layer using the same data with 3 pixel line width to
    // highlight the border of the area.
    c->addAreaLayer(DoubleArray(data1, sizeof(data1)/sizeof(data1[0])), 0x80CC6666,
        "Model Jupiter");
    c->addLineLayer(DoubleArray(data1, sizeof(data1)/sizeof(data1[0])), 0xcc6666
        )->setLineWidth(3);

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

    // output the chart
    c->makeChart("multiradar.png");

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