ChartDirector 7.0 (Java Edition)

Custom Scatter Symbols




This example demonstrates using external image files as scatter symbols.

The chart in this example is created as 5 scatter layers using XYChart.addScatterLayer, with each layer containing one point.

The symbols for the scatter layers come from external image files. They are loaded using DataSet.setDataSymbol2.

Source Code Listing

[JSP Version] jspdemo/scattersymbols.jsp
<%@page import="ChartDirector.*, java.util.*" %> <% // The XY points for the scatter chart double[] dataX = {200, 400, 300, 250, 500}; double[] dataY = {40, 100, 50, 150, 250}; // The custom symbols for the points String[] symbols = {"robot1.png", "robot2.png", "robot3.png", "robot4.png", "robot5.png"}; // Create a XYChart object of size 450 x 400 pixels XYChart c = new XYChart(450, 400); // Set the plotarea at (55, 40) and of size 350 x 300 pixels, with a light grey border (0xc0c0c0). // Turn on both horizontal and vertical grid lines with light grey color (0xc0c0c0) c.setPlotArea(55, 40, 350, 300, -1, -1, 0xc0c0c0, 0xc0c0c0, -1); // Add a title to the chart using 18pt Times Bold Itatic font. c.addTitle("Battle Robots", "Times New Roman Bold Italic", 18); // Add a title to the y axis using 12pt Arial Bold Italic font c.yAxis().setTitle("Speed (km/s)", "Arial Bold Italic", 12); // Add a title to the y axis using 12pt Arial Bold Italic font c.xAxis().setTitle("Range (km)", "Arial Bold Italic", 12); // Set the axes line width to 3 pixels c.xAxis().setWidth(3); c.yAxis().setWidth(3); // Add each point of the data as a separate scatter layer, so that they can have a different symbol for(int i = 0; i < dataX.length; ++i) { c.addScatterLayer(new double[]{dataX[i]}, new double[]{dataY[i]}).getDataSet(0).setDataSymbol2( symbols[i]); } // 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='Range = {x} km, Speed = {value} km/s'")); %> <!DOCTYPE html> <html> <head> <title>Custom Scatter Symbols</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;"> Custom Scatter Symbols </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>