Rotated Area Chart

This example demonstrates swapping the x and y axes to produce an rotated area chart in which the area goes from left to right (instead of bottom to top).

The x and y axes in the example are configured as follows:

Initially, the x-axis is horizontal from left to right at the bottom of the plot area, while the y-axis is vertical from bottom to top at the left side of the plot area.
Swap the x and y axes using XYChart.swapXY. Now the x-axis is vertical from bottom to top at the left side of the chart, while the y-axis is horizontal from left to right at the bottom of the chart.
Use XYChart.setYAxisOnRight to move the y-axis to the opposite side of the plot area, so that the y-axis is at the top of the plot area. (Note: the "right" word on setYAxisOnRight means the "right" side before "swapXY" rotation. After rotation, the right side will become to top side.)
Use Axis.setReverse to reverse the direction of the x-axis, so that the x-axis is vertical from top to bottom (instead of from bottom to top).

The area in this chart is filled using a gradient color created with BaseChart.gradientColor.

[JSP Version] jspdemo/rotatedarea.jsp

<%@page import="ChartDirector.*, java.util.*" %>
<%
// The data for the area chart
double[] data = {30, 28, 40, 55, 75, 68, 54, 60, 50, 62, 75, 65, 75, 89, 60, 55, 53, 35, 50, 66, 56,
    48, 52, 65, 62};

// The labels for the area chart
double[] labels = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22,
    23, 24};

// Create a XYChart object of size 320 x 320 pixels
XYChart c = new XYChart(320, 320);

// 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();

// Reverse the x axis so it is pointing downwards
c.xAxis().setReverse();

// Set the plotarea at (50, 50) and of size 200 x 200 pixels. Enable horizontal and vertical grids
// by setting their colors to grey (0xc0c0c0).
c.setPlotArea(50, 50, 250, 250).setGridColor(0xc0c0c0, 0xc0c0c0);

// Add a line chart layer using the given data
c.addAreaLayer(data, c.gradientColor(50, 0, 300, 0, 0xffffff, 0x0000ff));

// Set the labels on the x axis. Append "m" after the value to show the unit.
c.xAxis().setLabels2(labels, "{value} m");

// Display 1 out of 3 labels.
c.xAxis().setLabelStep(3);

// Add a title to the x axis
c.xAxis().setTitle("Depth");

// Add a title to the y axis
c.yAxis().setTitle("Carbon Dioxide Concentration (ppm)");

// Output the chart
WebChartViewer viewer = new WebChartViewer(request, "chart1");
viewer.setChart(c, Chart.SVG);

// Include tool tip for the chart
viewer.setImageMap(c.getHTMLImageMap("", "",
    "title='Carbon dioxide concentration at {xLabel}: {value} ppm'"));
%>
<!DOCTYPE html>
<html>
<head>
    <title>Rotated Area Chart</title>
    <!-- Include ChartDirector Javascript Library to support chart interactions -->
    <script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:5px 0px 0px 5px">
    <div style="font:bold 18pt verdana;">
        Rotated Area Chart
    </div>
    <hr style="border:solid 1px #000080; background:#000080" />
    <div style="font:10pt verdana; margin-bottom:1.5em">
        <a href="viewsource.jsp?file=<%=request.getServletPath()%>">View Source Code</a>
    </div>
    <!-- ****** Here is the chart image ****** -->
    <%= viewer.renderHTML(response) %>
</body>
</html>