




This example demonstrates the effects of different donut widths.
Donut widths are configured by using different inner and outer radii when calling PieChart.setDonutSize.
ChartDirector 5.1 (Java Edition)
Donut Width
Source Code Listing
<%@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 index) { // Determine the donut inner radius (as percentage of outer radius) based on // input parameter int donutRadius = index * 25; // The data for the pie chart double[] data = {10, 10, 10, 10, 10}; // The labels for the pie chart String[] labels = {"Marble", "Wood", "Granite", "Plastic", "Metal"}; // Create a PieChart object of size 150 x 120 pixels, with a grey (EEEEEE) // background, black border and 1 pixel 3D border effect PieChart c = new PieChart(150, 120, 0xeeeeee, 0x000000, 1); // Set donut center at (75, 65) and the outer radius to 50 pixels. Inner radius // is computed according donutWidth c.setDonutSize(75, 60, 50, (int)(50 * donutRadius / 100)); // Add a title to show the donut width c.addTitle("Inner Radius = " + donutRadius + " %", "Arial", 10).setBackground( 0xcccccc, 0); // Draw the pie in 3D c.set3D(12); // Set the pie data and the pie labels c.setData(data, labels); // Disable the sector labels by setting the color to Transparent c.setLabelStyle("", 8, Chart.Transparent); // Output the chart ImageWithHotSpot ret = new ImageWithHotSpot(); ret.imageURL = c.makeSession(request, "chart" + index); // Include tool tip for the chart ret.imageMap = c.getHTMLImageMap("", "", "title='{label}: {value}kg ({percent}%)'"); return ret; } %> <% ImageWithHotSpot chart0 = createChart(request, 0); ImageWithHotSpot chart1 = createChart(request, 1); ImageWithHotSpot chart2 = createChart(request, 2); ImageWithHotSpot chart3 = createChart(request, 3); ImageWithHotSpot chart4 = createChart(request, 4); %> <html> <body style="margin:5px 0px 0px 5px"> <div style="font-size:18pt; font-family:verdana; font-weight:bold"> Donut Width </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)%>' usemap="#map0" border="0"> <map name="map0"><%=chart0.imageMap%></map> <img src='<%=response.encodeURL("getchart.jsp?"+chart1.imageURL)%>' usemap="#map1" border="0"> <map name="map1"><%=chart1.imageMap%></map> <img src='<%=response.encodeURL("getchart.jsp?"+chart2.imageURL)%>' usemap="#map2" border="0"> <map name="map2"><%=chart2.imageMap%></map> <img src='<%=response.encodeURL("getchart.jsp?"+chart3.imageURL)%>' usemap="#map3" border="0"> <map name="map3"><%=chart3.imageMap%></map> <img src='<%=response.encodeURL("getchart.jsp?"+chart4.imageURL)%>' usemap="#map4" border="0"> <map name="map4"><%=chart4.imageMap%></map> </body> </html> |
import java.awt.*; import java.awt.event.*; import javax.swing.*; import ChartDirector.*; public class donutwidth implements DemoModule { //Name of demo program public String toString() { return "Donut Width"; } //Number of charts produced in this demo public int getNoOfCharts() { return 5; } //Main code for creating charts public void createChart(ChartViewer viewer, int index) { // Determine the donut inner radius (as percentage of outer radius) based on // input parameter int donutRadius = index * 25; // The data for the pie chart double[] data = {10, 10, 10, 10, 10}; // The labels for the pie chart String[] labels = {"Marble", "Wood", "Granite", "Plastic", "Metal"}; // Create a PieChart object of size 150 x 120 pixels, with a grey (EEEEEE) // background, black border and 1 pixel 3D border effect PieChart c = new PieChart(150, 120, 0xeeeeee, 0x000000, 1); // Set donut center at (75, 65) and the outer radius to 50 pixels. Inner // radius is computed according donutWidth c.setDonutSize(75, 60, 50, (int)(50 * donutRadius / 100)); // Add a title to show the donut width c.addTitle("Inner Radius = " + donutRadius + " %", "Arial", 10 ).setBackground(0xcccccc, 0); // Draw the pie in 3D c.set3D(12); // Set the pie data and the pie labels c.setData(data, labels); // Disable the sector labels by setting the color to Transparent c.setLabelStyle("", 8, Chart.Transparent); // Output the chart viewer.setChart(c); //include tool tip for the chart viewer.setImageMap(c.getHTMLImageMap("clickable", "", "title='{label}: {value}kg ({percent}%)'")); } //Allow this module to run as standalone program for easy testing public static void main(String[] args) { //Instantiate an instance of this demo module DemoModule demo = new donutwidth(); //Create and set up the main window JFrame frame = new JFrame(demo.toString()); frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) {System.exit(0);} }); frame.getContentPane().setBackground(Color.white); frame.getContentPane().setLayout(new FlowLayout(FlowLayout.LEFT)); frame.setSize(800, 450); // Create the charts and put them in the content pane for (int i = 0; i < demo.getNoOfCharts(); ++i) { ChartViewer viewer = new ChartViewer(); demo.createChart(viewer, i); frame.getContentPane().add(viewer); } // Display the window frame.setVisible(true); } } |