ChartDirector 6.0 (C++ Edition)

Rotated Pyramid Chart




This example demonstrates a semi-transparent pyramid viewed at elevation and rotation angles. It also demonstrates adding a legend box to the pyramid chart.

The elevation and rotation angles are set using PyramidChart.setViewAngle. The legend box is added using BaseChart.addLegend. Semi-transparent colors are used to make the pyramid semi-transparent.

Source Code Listing

[The following code is available in "cppdemo/rotatedpyramid". 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 pyramid chart
    double data[] = {156, 123, 211, 179};

    // The labels for the pyramid chart
    const char *labels[] = {"Funds", "Bonds", "Stocks", "Cash"};

    // The semi-transparent colors for the pyramid layers
    int colors[] = {0x400000cc, 0x4066aaee, 0x40ffbb00, 0x40ee6622};

    // Create a PyramidChart object of size 450 x 400 pixels
    PyramidChart *c = new PyramidChart(450, 400);

    // Set the pyramid center at (220, 180), and width x height to 150 x 300 pixels
    c->setPyramidSize(220, 180, 150, 300);

    // Set the elevation to 15 degrees and rotation to 75 degrees
    c->setViewAngle(15, 75);

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

    // Set the layer colors to the given colors
    c->setColors(Chart::DataColor, IntArray(colors, (int)(sizeof(colors) / sizeof(colors[0]))));

    // Leave 1% gaps between layers
    c->setLayerGap(0.01);

    // Add a legend box at (320, 60), with light grey (eeeeee) background and grey (888888) border.
    // Set the top-left and bottom-right corners to rounded corners of 10 pixels radius.
    LegendBox *legendBox = c->addLegend(320, 60);
    legendBox->setBackground(0xeeeeee, 0x888888);
    legendBox->setRoundedCorners(10, 0, 10, 0);

    // Add labels at the center of the pyramid layers using Arial Bold font. The labels will show
    // the percentage of the layers.
    c->setCenterLabel("{percent}%", "arialbd.ttf");

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

    //free up resources
    return 0;
}