#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 timestamps for the data
    double labels[] = {chartTime(2001, 1, 1), chartTime(2001, 2, 1), chartTime(2001,
        3, 1), chartTime(2001, 4, 1), chartTime(2001, 5, 1), chartTime(2001, 6, 1),
        chartTime(2001, 7, 1), chartTime(2001, 8, 1), chartTime(2001, 9, 1),
        chartTime(2001, 10, 1), chartTime(2001, 11, 1), chartTime(2001, 12, 1),
        chartTime(2002, 1, 1), chartTime(2002, 2, 1), chartTime(2002, 3, 1),
        chartTime(2002, 4, 1), chartTime(2002, 5, 1), chartTime(2002, 6, 1),
        chartTime(2002, 7, 1), chartTime(2002, 8, 1), chartTime(2002, 9, 1),
        chartTime(2002, 10, 1), chartTime(2002, 11, 1), chartTime(2002, 12, 1),
        chartTime(2003, 1, 1)};

    // Create a XYChart object of size 550 x 220 pixels
    XYChart *c = new XYChart(550, 220);

    // Set the plot area at (50, 10) and of size 480 x 180 pixels. Enabled both
    // vertical and horizontal grids by setting their colors to light grey (cccccc)
    c->setPlotArea(50, 10, 480, 180)->setGridColor(0xcccccc, 0xcccccc);

    // Add a legend box (50, 10) (top of plot area) using horizontal layout. Use 8
    // pts Arial font. Disable bounding box (set border to transparent).
    LegendBox *legendBox = c->addLegend(50, 10, false, "", 8);
    legendBox->setBackground(Chart::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(DoubleArray(labels, sizeof(labels)/sizeof(labels[0])));

    // Set multi-style axis label formatting. Use Arial Bold font for yearly labels
    // and display them as "yyyy". Use default font for monthly labels and display
    // them as "mmm". Replace some labels with minor ticks to ensure the labels are
    // at least 3 units apart.
    c->xAxis()->setMultiFormat(Chart::StartOfYearFilter(),
        "<*font=arialbd.ttf*>{value|yyyy}", Chart::StartOfMonthFilter(),
        "{value|mmm}", 3);

    // 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,
        Chart::DashLine));

    // Add the data line
    layer->addDataSet(DoubleArray(data, sizeof(data)/sizeof(data[0])), 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[0]))).add(
        DoubleArray(errData, sizeof(errData)/sizeof(errData[0]))), errColor);

    // Add the lower border of the err zone
    layer->addDataSet(ArrayMath(DoubleArray(data, sizeof(data)/sizeof(data[0]))).sub(
        DoubleArray(errData, sizeof(errData)/sizeof(errData[0]))), 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;
}

