<%@page import="ChartDirector.*" %>
<%@page import="java.util.*" %>
<%
//
// Data to draw the chart. In this demo, the data buffer will be filled by a random data generator.
// In real life, the data is probably stored in a buffer (eg. a database table, a text file, or some
// global memory) and updated by other means.
//
// We use a data buffer to emulate the last 240 samples.
int sampleSize = 240;
double[] dataSeries1 = new double[sampleSize];
double[] dataSeries2 = new double[sampleSize];
double[] dataSeries3 = new double[sampleSize];
Date[] timeStamps = new Date[sampleSize];
// Our pseudo random number generator
double firstDate = new Date().getTime() / 1000 - timeStamps.length;
for (int i = 0; i < timeStamps.length; ++i) {
double p = firstDate + i;
timeStamps[i] = new Date((long)p * 1000);
dataSeries1[i] = Math.cos(p * 2.1) * 10 + 1 / (Math.cos(p) * Math.cos(p) + 0.01) + 20;
dataSeries2[i] = 100 * Math.sin(p / 27.7) * Math.sin(p / 10.1) + 150;
dataSeries3[i] = 100 * Math.cos(p / 6.7) * Math.cos(p / 11.9) + 150;
}
// Create an XYChart object 600 x 270 pixels in size, with light grey (f4f4f4) background, black
// (000000) border, 1 pixel raised effect, and with a rounded frame.
XYChart c = new XYChart(600, 270, 0xf4f4f4, 0x000000, 0);
c.setRoundedFrame();
// Set the plotarea at (55, 62) and of size 520 x 175 pixels. Use white (ffffff) background. Enable
// both horizontal and vertical grids by setting their colors to grey (cccccc). Set clipping mode to
// clip the data lines to the plot area.
c.setPlotArea(55, 62, 520, 175, 0xffffff, -1, -1, 0xcccccc, 0xcccccc);
c.setClipping();
// Add a title to the chart using 15pt Times New Roman Bold Italic font, with a light grey (dddddd)
// background, black (000000) border, and a glass like raised effect.
c.addTitle("Field Intensity at Observation Satellite", "Times New Roman Bold Italic", 15
).setBackground(0xdddddd, 0x000000, Chart.glassEffect());
// Add a legend box at the top of the plot area with 9pt Arial Bold font. We set the legend box to
// the same width as the plot area and use grid layout (as opposed to flow or top/down layout). This
// distributes the 3 legend icons evenly on top of the plot area.
LegendBox b = c.addLegend2(55, 33, 3, "Arial Bold", 9);
b.setBackground(Chart.Transparent, Chart.Transparent);
b.setWidth(520);
// Configure the y-axis with a 10pt Arial Bold axis title
c.yAxis().setTitle("Intensity (V/m)", "Arial Bold", 10);
// Configure the x-axis to auto-scale with at least 75 pixels between major tick and 15 pixels
// between minor ticks. This shows more minor grid lines on the chart.
c.xAxis().setTickDensity(75, 15);
// Set the axes width to 2 pixels
c.xAxis().setWidth(2);
c.yAxis().setWidth(2);
// Set the x-axis label format
c.xAxis().setLabelFormat("{value|hh:nn:ss}");
// Create a line layer to plot the lines
LineLayer layer = c.addLineLayer2();
// The x-coordinates are the timeStamps.
layer.setXData(timeStamps);
// The 3 data series are used to draw 3 lines. Here we put the latest data values as part of the
// data set name, so you can see them updated in the legend box.
layer.addDataSet(dataSeries1, 0xff0000, c.formatValue(dataSeries1[dataSeries1.length - 1],
"Alpha: <*bgColor=FFCCCC*> {value|2} "));
layer.addDataSet(dataSeries2, 0x00cc00, c.formatValue(dataSeries2[dataSeries2.length - 1],
"Beta: <*bgColor=CCFFCC*> {value|2} "));
layer.addDataSet(dataSeries3, 0x0000ff, c.formatValue(dataSeries3[dataSeries3.length - 1],
"Gamma: <*bgColor=CCCCFF*> {value|2} "));
// Output the chart
String chart1URL = c.makeSession(request, "chart1");
// Send chart to browser
response.sendRedirect(response.encodeRedirectURL("getchart.jsp?" + chart1URL));
%> |