ChartDirector 6.1 (Java Edition)

Multi-Pointer Horizontal Meter




This example demonstrates a horizontal linear meter with multiple pointers.

Source Code Listing

[JSP Version] jspdemo/multihmeter.jsp
<%@page import="ChartDirector.*" %>
<%
// The values to display on the meter
double value0 = 30.99;
double value1 = 45.35;
double value2 = 77.64;

// Create an LinearMeter object of size 250 x 75 pixels, using silver background with a 2 pixel
// black 3D depressed border.
LinearMeter m = new LinearMeter(250, 75, Chart.silverColor(), 0, -2);

// Set the scale region top-left corner at (15, 25), with size of 220 x 20 pixels. The scale labels
// are located on the top (implies horizontal meter)
m.setMeter(15, 25, 220, 20, Chart.Top);

// Set meter scale from 0 - 100, with a tick every 10 units
m.setScale(0, 100, 10);

// Set 0 - 50 as green (99ff99) zone, 50 - 80 as yellow (ffff66) zone, and 80 - 100 as red (ffcccc)
// zone
m.addZone(0, 50, 0x99ff99);
m.addZone(50, 80, 0xffff66);
m.addZone(80, 100, 0xffcccc);

// Add deep red (000080), deep green (008000) and deep blue (800000) pointers to reflect the values
m.addPointer(value0, 0x000080);
m.addPointer(value1, 0x008000);
m.addPointer(value2, 0x800000);

// Add a label at bottom-left (10, 68) using Arial Bold/8pt/red (c00000)
m.addText(10, 68, "Temp C", "Arial Bold", 8, 0xc00000, Chart.BottomLeft);

// Add three text boxes to show the values in this meter
m.addText(148, 70, m.formatValue(value0, "2"), "Arial", 8, 0x6666ff, Chart.BottomRight
    ).setBackground(0, 0, -1);
m.addText(193, 70, m.formatValue(value1, "2"), "Arial", 8, 0x33ff33, Chart.BottomRight
    ).setBackground(0, 0, -1);
m.addText(238, 70, m.formatValue(value2, "2"), "Arial", 8, 0xff3333, Chart.BottomRight
    ).setBackground(0, 0, -1);

// Output the chart
String chart1URL = m.makeSession(request, "chart1");
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    Multi-Pointer Horizontal Meter
</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?"+chart1URL)%>'>
</body>
</html>

[Java Version] javademo/multihmeter.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;

public class multihmeter implements DemoModule
{
    //Name of demo program
    public String toString() { return "Multi-Pointer Horizontal Meter"; }

    //Number of charts produced in this demo
    public int getNoOfCharts() { return 1; }

    //Main code for creating charts
    public void createChart(ChartViewer viewer, int chartIndex)
    {
        // The values to display on the meter
        double value0 = 30.99;
        double value1 = 45.35;
        double value2 = 77.64;

        // Create an LinearMeter object of size 250 x 75 pixels, using silver background with a 2
        // pixel black 3D depressed border.
        LinearMeter m = new LinearMeter(250, 75, Chart.silverColor(), 0, -2);

        // Set the scale region top-left corner at (15, 25), with size of 220 x 20 pixels. The scale
        // labels are located on the top (implies horizontal meter)
        m.setMeter(15, 25, 220, 20, Chart.Top);

        // Set meter scale from 0 - 100, with a tick every 10 units
        m.setScale(0, 100, 10);

        // Set 0 - 50 as green (99ff99) zone, 50 - 80 as yellow (ffff66) zone, and 80 - 100 as red
        // (ffcccc) zone
        m.addZone(0, 50, 0x99ff99);
        m.addZone(50, 80, 0xffff66);
        m.addZone(80, 100, 0xffcccc);

        // Add deep red (000080), deep green (008000) and deep blue (800000) pointers to reflect the
        // values
        m.addPointer(value0, 0x000080);
        m.addPointer(value1, 0x008000);
        m.addPointer(value2, 0x800000);

        // Add a label at bottom-left (10, 68) using Arial Bold/8pt/red (c00000)
        m.addText(10, 68, "Temp C", "Arial Bold", 8, 0xc00000, Chart.BottomLeft);

        // Add three text boxes to show the values in this meter
        m.addText(148, 70, m.formatValue(value0, "2"), "Arial", 8, 0x6666ff, Chart.BottomRight
            ).setBackground(0, 0, -1);
        m.addText(193, 70, m.formatValue(value1, "2"), "Arial", 8, 0x33ff33, Chart.BottomRight
            ).setBackground(0, 0, -1);
        m.addText(238, 70, m.formatValue(value2, "2"), "Arial", 8, 0xff3333, Chart.BottomRight
            ).setBackground(0, 0, -1);

        // Output the chart
        viewer.setChart(m);
    }

    //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 multihmeter();

        //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);

        // Create the chart and put them in the content pane
        ChartViewer viewer = new ChartViewer();
        demo.createChart(viewer, 0);
        frame.getContentPane().add(viewer);

        // Display the window
        frame.pack();
        frame.setVisible(true);
    }
}