#include "chartdir.h"
int main(int argc, char *argv[])
{
//The data for the chart
double data[] = {50, 55, 47, 34, 42, 49, 63, 62, 73, 59, 56, 50, 64, 60, 67,
67, 58, 59, 73, 77, 84, 82, 80, 84, 89};
//The error data representing the error band around the data points
double errData[] = {5, 6, 5.1, 6.5, 6.6, 8, 5.4, 5.1, 4.6, 5.0, 5.2, 6.0,
4.9, 5.6, 4.8, 6.2, 7.4, 7.1, 6.5, 9.6, 12.1, 15.3, 18.5, 20.9, 24.1};
//The labels for the chart
const char *labels[] = {"Jan 01", "-", "-", "Apr", "-", "-", "Jul", "-",
"-", "Oct", "-", "-", "Jan 02", "-", "-", "Apr", "-", "-", "Jul", "-",
"-", "Oct", "-", "-", "Jan 03"};
//Create a XYChart object of size 550 x 220 pixels
XYChart *c = new XYChart(550, 220);
//Set the plot area at (50, 5) and of size 480 x 180 pixels. Enabled both
//vertical and horizontal grids by setting their colors to light grey
//(0xc0c0c0)
c->setPlotArea(50, 5, 480, 180)->setGridColor(0xc0c0c0, 0xc0c0c0);
//Add a legend box (50, 5) (top of plot area) using horizontal layout. Use 8
//pts Arial font. Disable bounding box (set border to transparent).
LegendBox *legendBox = c->addLegend(50, 5, false, "", 8);
legendBox->setBackground(Transparent);
//Add keys to the legend box to explain the color zones
legendBox->addKey("Historical", 0x9999ff);
legendBox->addKey("Forecast", 0xff9966);
//Add a title to the y axis.
c->yAxis()->setTitle("Energy Consumption");
//Set the labels on the x axis
c->xAxis()->setLabels(StringArray(labels, sizeof(labels)/sizeof(*labels)));
//Add a line layer to the chart
LineLayer *layer = c->addLineLayer();
//Create the color to draw the data line. The line is blue (0x333399) to the
//left of x = 18, and become a red (0xd04040) dash line to the right of x =
//18.
int lineColor = layer->xZoneColor(18, 0x333399, c->dashLineColor(0xd04040,
DashLine));
//Add the data line
layer->addDataSet(DoubleArray(data, sizeof(data)/sizeof(*data)), lineColor);
//Create the color to draw the err zone. The color is semi-transparent blue
//(0x809999ff) to the left of x = 18, and become semi-transparent red
//(0x80ff9966) to the right of x = 18.
int errColor = layer->xZoneColor(18, 0x809999ff, 0x80ff9966);
//Add the upper border of the err zone
layer->addDataSet(ArrayMath(DoubleArray(data, sizeof(data)/sizeof(*data))
).add(DoubleArray(errData, sizeof(errData)/sizeof(*errData))), errColor)
;
//Add the lower border of the err zone
layer->addDataSet(ArrayMath(DoubleArray(data, sizeof(data)/sizeof(*data))
).sub(DoubleArray(errData, sizeof(errData)/sizeof(*errData))), errColor)
;
//Set the default line width to 2 pixels
layer->setLineWidth(2);
//Color the region between the err zone lines
c->addInterLineLayer(layer->getLine(1), layer->getLine(2), errColor);
//output the chart
c->makeChart("xzonecolor.png");
//free up resources
delete c;
return 0;
}
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