#include "chartdir.h"
int main(int argc, char *argv[])
{
//
// We use a random number generator to simulate the data from 9:30am to 4:30pm with one data
// point every 4 minutes. The total number of points during that period is 106. (7 hours x
// 15 points/hour + 1)
//
int noOfPoints = 106;
// Assume we have not reached the end of the day yet, and only 85 points are available. Create a
// random table object of 1 col x 85 rows, using 9 as seed.
RanTable *rantable = new RanTable(9, 1, 85);
// Set the 1st column to start with 1800 and with random delta from -5 to 5.
rantable->setCol(0, 1800, -5, 5);
// Get the data as the 1st column of the random table
DoubleArray data = rantable->getCol(0);
// The x-axis labels for the chart
const char *labels[] = {"-", "10am", "-", " ", "-", "12am", "-", " ", "-", "2pm", "-", " ", "-",
"4pm", "-"};
//
// Now we obtain the data into arrays, we can start to draw the chart using ChartDirector
//
// Create a XYChart object of size 180 x 180 pixels with a blue background (0x9c9cce)
XYChart *c = new XYChart(180, 180, 0x9c9cce);
// Add titles to the top and bottom of the chart using 7.5pt Arial font. The text is white
// 0xffffff on a deep blue 0x31319C background.
c->addTitle(Chart::Top, "STAR TECH INDEX 2003-01-28", "arial.ttf", 7.5, 0xffffff, 0x31319c);
c->addTitle(Chart::Bottom, "LATEST STI:1809.41 (+14.51)", "arial.ttf", 7.5, 0xffffff, 0x31319c)
;
// Set the plotarea at (31, 21) and of size 145 x 124 pixels, with a pale yellow (0xffffc8)
// background.
c->setPlotArea(31, 21, 145, 124, 0xffffc8);
// Add custom text at (176, 21) (top right corner of plotarea) using 11pt Times Bold Italic
// font/red (0xc09090) color
c->addText(176, 21, "Chart Demo", "timesbi.ttf", 11, 0xc09090)->setAlignment(Chart::TopRight);
// Use 7.5pt Arial as the y axis label font
c->yAxis()->setLabelStyle("", 7.5);
// Set the labels on the x axis by spreading the labels evenly between the first point (index =
// 0) and the last point (index = noOfPoints - 1)
c->xAxis()->setLinearScale(0, noOfPoints - 1, StringArray(labels, (int)(sizeof(labels) / sizeof(
labels[0]))));
// Use 7.5pt Arial as the x axis label font
c->xAxis()->setLabelStyle("", 7.5);
// Add a deep blue (0x000080) line layer to the chart
c->addLineLayer(data, 0x000080);
// Output the chart
c->makeChart("compactline.png");
//free up resources
delete rantable;
delete c;
return 0;
} |