ChartDirector 6.0 (C++ Edition)

Multi-Depth Pie Chart




This example demonstrates a 3D pie chart where sectors have different 3D heights.

Instead of using PieChart.set3D to set a single 3D depth for all sectors, in this example, PieChart.set3D2 is used to set different depths for the sectors with an array of integers.

Source Code Listing

[The following code is available in "cppdemo/multidepthpie". 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 pie chart
    double data[] = {72, 18, 15, 12};

    // The labels for the pie chart
    const char *labels[] = {"Labor", "Machinery", "Facilities", "Computers"};

    // The depths for the sectors
    double depths[] = {30, 20, 10, 10};

    // Create a PieChart object of size 360 x 300 pixels, with a light blue (DDDDFF) background and
    // a 1 pixel 3D border
    PieChart *c = new PieChart(360, 300, 0xddddff, -1, 1);

    // Set the center of the pie at (180, 175) and the radius to 100 pixels
    c->setPieSize(180, 175, 100);

    // Add a title box using 15pt Times Bold Italic font and blue (AAAAFF) as background color
    c->addTitle("Project Cost Breakdown", "timesbi.ttf", 15)->setBackground(0xaaaaff);

    // Set the pie data and the pie labels
    c->setData(DoubleArray(data, (int)(sizeof(data) / sizeof(data[0]))), StringArray(labels, (int)(
        sizeof(labels) / sizeof(labels[0]))));

    // Draw the pie in 3D with variable 3D depths
    c->set3D(DoubleArray(depths, (int)(sizeof(depths) / sizeof(depths[0]))));

    // Set the start angle to 225 degrees may improve layout when the depths of the sector are
    // sorted in descending order, because it ensures the tallest sector is at the back.
    c->setStartAngle(225);

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

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