ChartDirector 6.0 (C++ Edition)

3D Angle


            

This example demonstrates the effects of different 3D angles.

ChartDirector allows the 3D depth and angles to be configured using PieChart.set3D and PieChart.set3D2.

This example also demonstrates how to disable sector labels. This is setting their colors to Transparent using PieChart.setLabelStyle.

Source Code Listing

[The following code is available in "cppdemo/threedanglepie". 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"
#include <stdio.h>

void createChart(int chartIndex, const char *filename)
{
    char buffer[256];

    // the tilt angle of the pie
    int angle = chartIndex * 15;

    // The data for the pie chart
    double data[] = {25, 18, 15, 12, 8, 30, 35};

    // Create a PieChart object of size 100 x 110 pixels
    PieChart *c = new PieChart(100, 110);

    // Set the center of the pie at (50, 55) and the radius to 38 pixels
    c->setPieSize(50, 55, 38);

    // Set the depth and tilt angle of the 3D pie (-1 means auto depth)
    c->set3D(-1, angle);

    // Add a title showing the tilt angle
    sprintf(buffer, "Tilt = %d deg", angle);
    c->addTitle(buffer, "arial.ttf", 8);

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

    // Disable the sector labels by setting the color to Transparent
    c->setLabelStyle("", 8, Chart::Transparent);

    // Output the chart
    c->makeChart(filename);

    //free up resources
    delete c;
}

int main(int argc, char *argv[])
{
    createChart(0, "threedanglepie0.png");
    createChart(1, "threedanglepie1.png");
    createChart(2, "threedanglepie2.png");
    createChart(3, "threedanglepie3.png");
    createChart(4, "threedanglepie4.png");
    createChart(5, "threedanglepie5.png");
    createChart(6, "threedanglepie6.png");
    return 0;
}