#include "chartdir.h"
int main(int argc, char *argv[])
{
//
// We use a random table to simulate generating 12 months of data
//
// Create the random table object with 4 cols * 12 rows, using 3 as seed
RanTable *rantable = new RanTable(3, 4, 12);
// Set the 1st column to be the 12 months of year 2002
rantable->setDateCol(0, Chart::chartTime(2002, 1, 1), 86400 * 30);
// Set the 2nd, 3rd and 4th columns to be random numbers starting from 125, 75, and 100
// respectively. The change between rows is set to -35 to + 35. The minimum value of any cell is
// 0.
rantable->setCol(1, 125, -35, 35, 0);
rantable->setCol(2, 75, -35, 35, 0);
rantable->setCol(3, 100, -35, 35, 0);
// Get the 1st column (time) as the x data
DoubleArray dataX = rantable->getCol(0);
// Get the 2nd, 3rd and 4th columns as 3 data sets
DoubleArray dataY0 = rantable->getCol(1);
DoubleArray dataY1 = rantable->getCol(2);
DoubleArray dataY2 = rantable->getCol(3);
// Create a XYChart object of size 360 x 400 pixels
XYChart *c = new XYChart(360, 400);
// Add a title to the chart
c->addTitle("<*underline=2*>Rotated Line Chart Demo", "timesbi.ttf", 14);
// Set the plotarea at (60, 75) and of size 190 x 320 pixels. Turn on both horizontal and
// vertical grid lines with light grey color (0xc0c0c0)
c->setPlotArea(60, 75, 190, 320)->setGridColor(0xc0c0c0, 0xc0c0c0);
// Add a legend box at (270, 75)
c->addLegend(270, 75);
// Swap the x and y axis to become a rotated chart
c->swapXY();
// Set the y axis on the top side (right + rotated = top)
c->setYAxisOnRight();
// Add a title to the y axis
c->yAxis()->setTitle("Throughput (MBytes)");
// Reverse the x axis so it is pointing downwards
c->xAxis()->setReverse();
// Add a line chart layer using the given data
LineLayer *layer = c->addLineLayer();
layer->setXData(dataX);
layer->addDataSet(dataY0, 0xff0000, "Server A");
layer->addDataSet(dataY1, 0x338033, "Server B");
layer->addDataSet(dataY2, 0x0000ff, "Server C");
// Set the line width to 2 pixels
layer->setLineWidth(2);
// Output the chart
c->makeChart("rotatedline.png");
//free up resources
delete rantable;
delete c;
return 0;
} |