Bar Gap

The following is the command line version of the code in "cppdemo/gapbar". 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"
#include <stdio.h>

void createChart(int chartIndex, const char *filename)
{
    char buffer[1024];

    double bargap = chartIndex * 0.25 - 0.25;

    // The data for the bar chart
    double data[] = {100, 125, 245, 147, 67};
    const int data_size = (int)(sizeof(data)/sizeof(*data));

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

    // Create a XYChart object of size 150 x 150 pixels
    XYChart* c = new XYChart(150, 150);

    // Set the plotarea at (27, 20) and of size 120 x 100 pixels
    c->setPlotArea(27, 20, 120, 100);

    // Set the labels on the x axis
    c->xAxis()->setLabels(StringArray(labels, labels_size));

    if (bargap >= 0) {
        // Add a title to display to bar gap using 8pt Arial font
        sprintf(buffer, "      Bar Gap = %g", bargap);
        c->addTitle(buffer, "Arial", 8);
    } else {
        // Use negative value to mean TouchBar
        c->addTitle("      Bar Gap = TouchBar", "Arial", 8);
        bargap = Chart::TouchBar;
    }

    // Add a bar chart layer using the given data and set the bar gap
    c->addBarLayer(DoubleArray(data, data_size))->setBarGap(bargap);

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

    //free up resources
    delete c;

}

int main(int argc, char *argv[])
{
    createChart(0, "gapbar0.png");
    createChart(1, "gapbar1.png");
    createChart(2, "gapbar2.png");
    createChart(3, "gapbar3.png");
    createChart(4, "gapbar4.png");
    createChart(5, "gapbar5.png");
    return 0;
}