<%@page import="ChartDirector.*" %>
<%@page import="javax.servlet.http.*" %>
<%!
// A simple structure to represent a chart image with an image map
private static class ImageWithHotSpot
{
String imageURL;
String imageMap;
}
// Function to create the demo charts
ImageWithHotSpot createChart(HttpServletRequest request, int chartIndex)
{
// The x and y coordinates of the grid
double[] dataX = {-4, -3, -2, -1, 0, 1, 2, 3, 4};
double[] dataY = {-4, -3, -2, -1, 0, 1, 2, 3, 4};
// Use random numbers for the z values on the XY grid
RanSeries r = new RanSeries(99);
double[] dataZ = r.get2DSeries(dataX.length, dataY.length, -0.9, 0.9);
// Create a XYChart object of size 420 x 360 pixels
XYChart c = new XYChart(420, 360);
// Set the plotarea at (30, 25) and of size 300 x 300 pixels. Use semi-transparent grey
// (0xdd000000) horizontal and vertical grid lines
c.setPlotArea(30, 25, 300, 300, -1, -1, -1, 0xdd000000, -1);
// Set the x-axis and y-axis scale
c.xAxis().setLinearScale(-4, 4, 1);
c.yAxis().setLinearScale(-4, 4, 1);
// Add a contour layer using the given data
ContourLayer layer = c.addContourLayer(dataX, dataY, dataZ);
// Move the grid lines in front of the contour layer
c.getPlotArea().moveGridBefore(layer);
// Add a color axis (the legend) in which the top left corner is anchored at (350, 25). Set the
// length to 400 300 and the labels on the right side.
ColorAxis cAxis = layer.setColorAxis(350, 25, Chart.TopLeft, 300, Chart.Right);
if (chartIndex == 1) {
// Speicify a color gradient as a list of colors, and use it in the color axis.
int[] colorGradient = {0x0044cc, 0xffffff, 0x00aa00};
cAxis.setColorGradient(false, colorGradient);
} else if (chartIndex == 2) {
// Specify the color scale to use in the color axis
double[] colorScale = {-1.0, 0x1a9850, -0.75, 0x66bd63, -0.5, 0xa6d96a, -0.25, 0xd9ef8b, 0,
0xfee08b, 0.25, 0xfdae61, 0.5, 0xf46d43, 0.75, 0xd73027, 1};
cAxis.setColorScale(colorScale);
} else if (chartIndex == 3) {
// Specify the color scale to use in the color axis. Also specify an underflow color
// 0x66ccff (blue) for regions that fall below the lower axis limit.
double[] colorScale = {0, 0xffff99, 0.2, 0x80cdc1, 0.4, 0x35978f, 0.6, 0x01665e, 0.8,
0x003c30, 1};
cAxis.setColorScale(colorScale, 0x66ccff);
}
// Output the chart
ImageWithHotSpot ret = new ImageWithHotSpot();
ret.imageURL = c.makeSession(request, "chart" + chartIndex);
return ret;
}
%>
<%
ImageWithHotSpot chart0 = createChart(request, 0);
ImageWithHotSpot chart1 = createChart(request, 1);
ImageWithHotSpot chart2 = createChart(request, 2);
ImageWithHotSpot chart3 = createChart(request, 3);
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
Contour Color Scale
</div>
<hr color="#000080">
<div style="font-size:10pt; font-family:verdana; margin-bottom:1.5em">
<a href="viewsource.jsp?file=<%=request.getServletPath()%>">View Source Code</a>
</div>
<img src='<%=response.encodeURL("getchart.jsp?"+chart0.imageURL)%>'>
<img src='<%=response.encodeURL("getchart.jsp?"+chart1.imageURL)%>'>
<img src='<%=response.encodeURL("getchart.jsp?"+chart2.imageURL)%>'>
<img src='<%=response.encodeURL("getchart.jsp?"+chart3.imageURL)%>'>
</body>
</html> |