Multi Level Tree Map

The following is the command line version of the code in "cppdemo/multileveltreemap". 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 first level nodes of the tree map. There are 5 nodes.
    const char* animals[] = {"Fish", "Amphibian", "Reptile", "Bird", "Mammal"};
    const int animals_size = (int)(sizeof(animals)/sizeof(*animals));

    // In this example, the colors are based on the first level nodes.
    int colors[] = {0xff5555, 0xff9933, 0xffff44, 0x66ff66, 0x44ccff};
    const int colors_size = (int)(sizeof(colors)/sizeof(*colors));

    // Data for the second level nodes in "Fish"
    const char* fish_names[] = {"Shark", "Ray", "Swordfish", "Sawfish", "Eel", "Lionfish",
        "Seahorse"};
    const int fish_names_size = (int)(sizeof(fish_names)/sizeof(*fish_names));
    double fish_data[] = {170, 144, 109, 115, 75, 45, 54};
    const int fish_data_size = (int)(sizeof(fish_data)/sizeof(*fish_data));

    // Data for the second level nodes in "Bird"
    const char* bird_names[] = {"Swan", "Ostrich", "Eagle", "Penguin", "Kiwi", "Flamingo", "Owl",
        "Peacock"};
    const int bird_names_size = (int)(sizeof(bird_names)/sizeof(*bird_names));
    double bird_data[] = {89, 64, 94, 106, 68, 81, 40, 73};
    const int bird_data_size = (int)(sizeof(bird_data)/sizeof(*bird_data));

    // Data for the second level nodes in "Amphibian"
    const char* amphibian_names[] = {"Toad", "Salamander", "Frog", "Caecilian"};
    const int amphibian_names_size = (int)(sizeof(amphibian_names)/sizeof(*amphibian_names));
    double amphibian_data[] = {67, 47, 58, 36};
    const int amphibian_data_size = (int)(sizeof(amphibian_data)/sizeof(*amphibian_data));

    // Data for the second level nodes in "Reptile"
    const char* reptile_names[] = {"Turtle", "Crocodile", "Lizard", "Snake"};
    const int reptile_names_size = (int)(sizeof(reptile_names)/sizeof(*reptile_names));
    double reptile_data[] = {58, 154, 97, 41};
    const int reptile_data_size = (int)(sizeof(reptile_data)/sizeof(*reptile_data));

    // Data for the second level nodes in "Mammal"
    const char* mammal_names[] = {"Big Cat", "Primate", "Panda", "Elephant", "Hippo", "Rhino",
        "Giraffe"};
    const int mammal_names_size = (int)(sizeof(mammal_names)/sizeof(*mammal_names));
    double mammal_data[] = {266, 207, 160, 194, 168, 149, 202};
    const int mammal_data_size = (int)(sizeof(mammal_data)/sizeof(*mammal_data));

    // Create a Tree Map object of size 600 x 600 pixels
    TreeMapChart* c = new TreeMapChart(600, 600);

    // Add a title to the chart
    c->addTitle("Animal Kingdom Census", "Arial Bold Italic", 18);

    // Set the plotarea at (30, 30) and of size 540 x 540 pixels
    c->setPlotArea(30, 30, 540, 540);

    // Obtain the root of the tree map, which is the entire plot area
    TreeMapNode* root = c->getRootNode();

    // Add first level nodes to the root. We do not need to provide data as they will be computed as
    // the sum of the second level nodes.
    root->setData(DoubleArray(), StringArray(animals, animals_size), IntArray(colors, colors_size));

    // Add second level nodes to each of the first level node
    root->getNode(0)->setData(DoubleArray(fish_data, fish_data_size), StringArray(fish_names,
        fish_names_size));
    root->getNode(1)->setData(DoubleArray(amphibian_data, amphibian_data_size), StringArray(
        amphibian_names, amphibian_names_size));
    root->getNode(2)->setData(DoubleArray(reptile_data, reptile_data_size), StringArray(
        reptile_names, reptile_names_size));
    root->getNode(3)->setData(DoubleArray(bird_data, bird_data_size), StringArray(bird_names,
        bird_names_size));
    root->getNode(4)->setData(DoubleArray(mammal_data, mammal_data_size), StringArray(mammal_names,
        mammal_names_size));

    // Get the prototype (template) for the first level nodes.
    TreeMapNode* nodeConfig = c->getLevelPrototype(1);

    // Set the label format for the nodes to show the label with 8pt Arial Bold font in
    // semi-transparent black color (0x77000000). Put the text at the top left corner of the cell.
    nodeConfig->setLabelFormat("{label}", "Times New Roman Bold Italic", 18, 0x77000000,
        Chart::TopLeft);

    // Set the border color to white (ffffff)
    nodeConfig->setColors(-1, 0xffffff);

    // Get the prototype (template) for the second level nodes.
    TreeMapNode* nodeConfig2 = c->getLevelPrototype(2);

    // Set the label format for the nodes to show the label and value with 8pt Arial Bold font. Put
    // the text at the center of the cell.
    nodeConfig2->setLabelFormat("{label}<*br*>{value}", "Arial Bold", 8, Chart::TextColor,
        Chart::Center);

    // Set the border color to white (ffffff)
    nodeConfig2->setColors(-1, 0xffffff);

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

    //free up resources
    delete c;

    return 0;
}