ChartDirector 6.1 (Java Edition)

Vertical Linear Meter




This example demonstrates the basic steps in creating a vertical linear meter.

A vertical linear meter can be created using the following steps:

Source Code Listing

[JSP Version] jspdemo/vlinearmeter.jsp
<%@page import="ChartDirector.*" %>
<%
// The value to display on the meter
double value = 74.35;

// Create an LinearMeter object of size 70 x 240 pixels with a very light grey (0xeeeeee)
// background, and a rounded 3-pixel thick light grey (0xcccccc) border
LinearMeter m = new LinearMeter(70, 240, 0xeeeeee, 0xcccccc);
m.setRoundedFrame(Chart.Transparent);
m.setThickFrame(3);

// Set the scale region top-left corner at (28, 18), with size of 20 x 205 pixels. The scale labels
// are located on the left (default - implies vertical meter).
m.setMeter(28, 18, 20, 205);

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

// Add a smooth color scale to the meter
double[] smoothColorScale = {0, 0x6666ff, 25, 0x00bbbb, 50, 0x00ff00, 75, 0xffff00, 100, 0xff0000};
m.addColorScale(smoothColorScale);

// Add a blue (0x0000cc) pointer at the specified value
m.addPointer(value, 0x0000cc);

// 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">
    Vertical Linear 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/vlinearmeter.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;

public class vlinearmeter implements DemoModule
{
    //Name of demo program
    public String toString() { return "Vertical Linear 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 value to display on the meter
        double value = 74.35;

        // Create an LinearMeter object of size 70 x 240 pixels with a very light grey (0xeeeeee)
        // background, and a rounded 3-pixel thick light grey (0xcccccc) border
        LinearMeter m = new LinearMeter(70, 240, 0xeeeeee, 0xcccccc);
        m.setRoundedFrame(Chart.Transparent);
        m.setThickFrame(3);

        // Set the scale region top-left corner at (28, 18), with size of 20 x 205 pixels. The scale
        // labels are located on the left (default - implies vertical meter).
        m.setMeter(28, 18, 20, 205);

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

        // Add a smooth color scale to the meter
        double[] smoothColorScale = {0, 0x6666ff, 25, 0x00bbbb, 50, 0x00ff00, 75, 0xffff00, 100,
            0xff0000};
        m.addColorScale(smoothColorScale);

        // Add a blue (0x0000cc) pointer at the specified value
        m.addPointer(value, 0x0000cc);

        // 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 vlinearmeter();

        //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);
    }
}