ChartDirector 6.0 (C++ Edition)

Cylinder Bar Shape




This example demonstrates bars of cylinder shape.

ChartDirector supports bars in cylindrical or arbitrary polygonal shapes. The shape are specified using BarLayer.setBarShape or BarLayer.setBarShape2. In this example, the cylindrical shape is illustrated.

See Shape Specification on how built-in and custom shapes are defined in ChartDirector.

Source Code Listing

[The following code is available in "cppdemo/cylinderbar". 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 bar chart
    double data[] = {85, 156, 179.5, 211, 123};

    // The labels for the bar chart
    const char *labels[] = {"Mon", "Tue", "Wed", "Thu", "Fri"};

    // Create a XYChart object of size 400 x 240 pixels.
    XYChart *c = new XYChart(400, 240);

    // Add a title to the chart using 14pt Times Bold Italic font
    c->addTitle("Weekly Server Load", "timesbi.ttf", 14);

    // Set the plotarea at (45, 40) and of 300 x 160 pixels in size. Use alternating light grey
    // (f8f8f8) / white (ffffff) background.
    c->setPlotArea(45, 40, 300, 160, 0xf8f8f8, 0xffffff);

    // Add a multi-color bar chart layer
    BarLayer *layer = c->addBarLayer(DoubleArray(data, (int)(sizeof(data) / sizeof(data[0]))),
        IntArray(0, 0));

    // Set layer to 3D with 10 pixels 3D depth
    layer->set3D(10);

    // Set bar shape to circular (cylinder)
    layer->setBarShape(Chart::CircleShape);

    // Set the labels on the x axis.
    c->xAxis()->setLabels(StringArray(labels, (int)(sizeof(labels) / sizeof(labels[0]))));

    // Add a title to the y axis
    c->yAxis()->setTitle("MBytes");

    // Add a title to the x axis
    c->xAxis()->setTitle("Work Week 25");

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

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