int main(int argc, char *argv[])
{
// 4 data points to represent the cash flow for the Q1 - Q4
double data[] = {230, 140, 220, 330, 150};
// We want to plot a waterfall chart showing the 4 quarters as well as the total
const char *labels[] = {"Product 1", "Product 2", "Product 3", "Product 4",
"Product 5", "Total"};
// The top side of the bars in a waterfall chart is the accumulated data. We use
// the ChartDirector ArrayMath utility to accumulate the data. The "total" is
// handled by inserting a zero point at the end before accumulation (after
// accumulation it will become the total).
ArrayMath boxTop = ArrayMath(DoubleArray(data, sizeof(data)/sizeof(data[0]))
).insert(0, 1).acc();
// The botom side of the bars is just the top side of the previous bar. So we
// shifted the top side data to obtain the bottom side data.
ArrayMath boxBottom = ArrayMath(boxTop).shift(1, 0);
// The last point (total) is different. Its bottom side is always 0.
boxBottom.trim(0, sizeof(data) / sizeof(data[0])).insert(0, 1);
// Create a XYChart object of size 500 x 280 pixels. Set background color to
// light blue (ccccff), with 1 pixel 3D border effect.
XYChart *c = new XYChart(500, 290, 0xccccff, 0x000000, 1);
// Add a title to the chart using 13 points Arial Bold Itatic font, with white
// (ffffff) text on a deep blue (0x80) background
c->addTitle("Product Revenue - Year 2004", "arialbi.ttf", 13, 0xffffff
)->setBackground(0x000080);
// Set the plotarea at (55, 50) and of size 430 x 215 pixels. Use alternative
// white/grey background.
c->setPlotArea(55, 45, 430, 215, 0xffffff, 0xeeeeee);
// Set the labels on the x axis using Arial Bold font
c->xAxis()->setLabels(StringArray(labels, sizeof(labels)/sizeof(labels[0]))
)->setFontStyle("arialbd.ttf");
// Set the x-axis ticks and grid lines to be between the bars
c->xAxis()->setTickOffset(0.5);
// Use Arial Bold as the y axis label font
c->yAxis()->setLabelStyle("arialbd.ttf");
// Add a title to the y axis
c->yAxis()->setTitle("USD (in millions)");
// Add a multi-color box-whisker layer to represent the waterfall bars
BoxWhiskerLayer *layer = c->addBoxWhiskerLayer2(boxTop, boxBottom);
// Put data labels on the bars to show the cash flow using Arial Bold font
layer->setDataLabelFormat("{={top}-{bottom}}M");
layer->setDataLabelStyle("arialbd.ttf")->setAlignment(Chart::Center);
// Output the chart
c->makeChart("waterfall.png");
//free up resources
delete c;
return 0;
}
