ChartDirector 7.0 (Java Edition)

Enhanced Area Chart




This example extends the Simple Area Chart example by decorating the chart using a number of chart formatting features.

Source Code Listing

[JSP Version] jspdemo/enhancedarea.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 String[] 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 600 x 360 pixels, with a brushed silver background, 1 pixel 3D // border effect, rounded corners and soft drop shadow. XYChart c = new XYChart(600, 360, Chart.brushedSilverColor(), Chart.Transparent, 1); c.setRoundedFrame(); c.setDropShadow(); //Set search path to current JSP directory for loading icon images c.setSearchPath(getServletConfig().getServletContext(), request); // Add a title box to the chart using 18pt Times Bold Italic font. TextBox title = c.addTitle( "<*block,valign=absmiddle*><*img=star.png*><*img=star.png*> Performance Enhancer " + "<*img=star.png*><*img=star.png*><*/*>", "Times New Roman Bold Italic", 18); // // Use a text box with a depressed 3D border to create the inner depressed region // // The width of the frame border int frameWidth = 5; // Set the depressed region position TextBox contentBox = c.addText(frameWidth, title.getHeight(), ""); contentBox.setSize(c.getDrawArea().getWidth() - 1 - frameWidth * 2, c.getDrawArea().getHeight() - title.getHeight() - frameWidth - 1); // Use -1 as the rasied effect to create a depressed region contentBox.setBackground(Chart.Transparent, Chart.Transparent, -1); // Set rounded corners, and put the text box at the back of the chart contentBox.setRoundedCorners(10); contentBox.setZOrder(Chart.ChartBackZ); // Tentatively set the plotarea to 50 pixels from the left depressed edge, and 25 pixels under the // top depressed edge. Set the width to 75 pixels less than the depressed region width, and the // height to 75 pixels less than the depressed region height. Use white (ffffff) background, // transparent border, and grey (cccccc) horizontal and vertical grid lines. PlotArea plotArea = c.setPlotArea(50 + contentBox.getLeftX(), contentBox.getTopY() + 25, contentBox.getWidth() - 75, contentBox.getHeight() - 75, 0xffffff, -1, -1, 0xcccccc, -1); // Add a title to the y axis c.yAxis().setTitle("Energy Concentration (KJ per liter)"); // Set the labels on the x axis. c.xAxis().setLabels(labels); // Display 1 out of 3 labels on the x-axis. c.xAxis().setLabelStep(3); // Add a title to the x axis using CDML c.xAxis().setTitle("<*block,valign=absmiddle*><*img=clock.png*> Elapsed Time (hour)<*/*>"); // Set the axes width to 2 pixels c.xAxis().setWidth(2); c.yAxis().setWidth(2); // Add an area layer to the chart using a gradient color that changes vertically from // semi-transparent red (60ff0000) to semi-transparent white (60ffffff) c.addAreaLayer(data, c.linearGradientColor(0, contentBox.getTopY() + 20, 0, contentBox.getTopY() + contentBox.getHeight() - 50, 0x60ff0000, 0x60ffffff)); // Adjust the plot area size, such that the bounding box (inclusive of axes) is 15 pixels from the // left depressed edge, 25 pixels below the top depressed edge, 25 pixels from the right depressed // edge, and 15 pixels above the bottom depressed edge. c.packPlotArea(contentBox.getLeftX() + 15, contentBox.getTopY() + 25, contentBox.getLeftX() + contentBox.getWidth() - 25, contentBox.getTopY() + contentBox.getHeight() - 15); // Add a custom CDML text with the bottom right corner is anchored to the bootom right corner of the // plot area, with 5 pixels margin. c.addText(plotArea.getLeftX() + plotArea.getWidth() - 5, plotArea.getTopY() + plotArea.getHeight() - 5, "<*block,valign=absmiddle*><*img=small_molecule.png*> <*block*><*font=Times New Roman Bold " + "Italic,size=10,color=804040*>Molecular\nEngineering<*/*>").setAlignment(Chart.BottomRight); // 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='Hour {xLabel}: {value} KJ/liter'")); %> <!DOCTYPE html> <html> <head> <title>Enhanced 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;"> Enhanced 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>