#include "chartdir.h"
int main(int argc, char *argv[])
{
// The data for the bar chart
double data[] = {-6.3, 2.3, 0.7, -3.4, 2.2, -2.9, -0.1, -0.1, 3.3, 6.2, 4.3, 1.6}
;
// The labels for the bar chart
const char *labels[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug",
"Sep", "Oct", "Nov", "Dec"};
// Create a XYChart object of size 500 x 320 pixels
XYChart *c = new XYChart(500, 320);
// Add a title to the chart using Arial Bold Italic font
c->addTitle("Productivity Change - Year 2005", "arialbi.ttf");
// Set the plotarea at (50, 30) and of size 400 x 250 pixels
c->setPlotArea(50, 30, 400, 250);
// Add a bar layer to the chart using the Overlay data combine method
BarLayer *layer = c->addBarLayer(Chart::Overlay);
// Select positive data and add it as data set with blue (6666ff) color
layer->addDataSet(ArrayMath(DoubleArray(data, sizeof(data)/sizeof(data[0]))
).selectGEZ(DoubleArray(), Chart::NoValue), 0x6666ff);
// Select negative data and add it as data set with orange (ff6600) color
layer->addDataSet(ArrayMath(DoubleArray(data, sizeof(data)/sizeof(data[0]))
).selectLTZ(DoubleArray(), Chart::NoValue), 0xff6600);
// Add labels to the top of the bar using 8 pt Arial Bold font. The font color is
// configured to be red (0xcc3300) below zero, and blue (0x3333ff) above zero.
layer->setAggregateLabelStyle("arialbd.ttf", 8, layer->yZoneColor(0, 0xcc3300,
0x3333ff));
// Set the labels on the x axis and use Arial Bold as the label font
c->xAxis()->setLabels(StringArray(labels, sizeof(labels)/sizeof(labels[0]))
)->setFontStyle("arialbd.ttf");
// Draw the y axis on the right of the plot area
c->setYAxisOnRight(true);
// Use Arial Bold as the y axis label font
c->yAxis()->setLabelStyle("arialbd.ttf");
// Add a title to the y axis
c->yAxis()->setTitle("Percentage");
// Add a light blue (0xccccff) zone for positive part of the plot area
c->yAxis()->addZone(0, 9999, 0xccccff);
// Add a pink (0xffffcc) zone for negative part of the plot area
c->yAxis()->addZone(-9999, 0, 0xffcccc);
// output the chart
c->makeChart("posnegbar.png");
//free up resources
delete c;
return 0;
} |