ChartDirector 6.1 (Java Edition)

V-Linear Meter Orientation


  

This example demonstration various orientations for vertical linear meters.

In a vertical linear meter, the scale labels can be positioned on the left or right side of the meter scale. This is controlled by the last argument to LinearMeter.setMeter, which can be Left or Right.

Source Code Listing

[JSP Version] jspdemo/vlinearmeterorientation.jsp
<%@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 chartIndex)
{
    // The value to display on the meter
    double value = 75.35;

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

    // This example demonstrates putting the text labels at the left or right side by setting the
    // label alignment and scale position.
    if (chartIndex == 0) {
        m.setMeter(28, 18, 20, 205, Chart.Left);
    } else {
        m.setMeter(20, 18, 20, 205, Chart.Right);
    }

    // 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
    ImageWithHotSpot ret = new ImageWithHotSpot();
    ret.imageURL = m.makeSession(request, "chart" + chartIndex);
    return ret;
}
%>
<%
ImageWithHotSpot chart0 = createChart(request, 0);
ImageWithHotSpot chart1 = createChart(request, 1);
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    V-Linear Meter Orientation
</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)%>'>
<img src='<%=response.encodeURL("getchart.jsp?"+chart1.imageURL)%>'>
</body>
</html>

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

public class vlinearmeterorientation implements DemoModule
{
    //Name of demo program
    public String toString() { return "V-Linear Meter Orientation"; }

    //Number of charts produced in this demo
    public int getNoOfCharts() { return 2; }

    //Main code for creating charts
    public void createChart(ChartViewer viewer, int chartIndex)
    {
        // The value to display on the meter
        double value = 75.35;

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

        // This example demonstrates putting the text labels at the left or right side by setting
        // the label alignment and scale position.
        if (chartIndex == 0) {
            m.setMeter(28, 18, 20, 205, Chart.Left);
        } else {
            m.setMeter(20, 18, 20, 205, Chart.Right);
        }

        // 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 vlinearmeterorientation();

        //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);
    }
}