ChartDirector 6.1 (Java Edition)

White Horizontal Linear Meters


      

This example demonstrates horizontal bar meters in a white coloring scheme.

Source Code Listing

[JSP Version] jspdemo/whitehlinearmeter.jsp
<%@page import="ChartDirector.*" %>
<%@page import="javax.servlet.http.*" %>
<%!
// Function to create the demo charts
String createChart(HttpServletRequest request, int chartIndex)
{
    // The value to display on the meter
    double value = 74.25;

    // Create a LinearMeter object of size 250 x 75 pixels with very light grey (0xeeeeee)
    // backgruond and a light grey (0xccccccc) 3-pixel thick rounded frame
    LinearMeter m = new LinearMeter(250, 75, 0xeeeeee, 0xcccccc);
    m.setRoundedFrame(Chart.Transparent);
    m.setThickFrame(3);

    // Set the scale region top-left corner at (14, 23), with size of 218 x 20 pixels. The scale
    // labels are located on the top (implies horizontal meter)
    m.setMeter(14, 23, 218, 20, Chart.Top);

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

    // Demostrate different types of color scales and putting them at different positions
    double[] smoothColorScale = {0, 0x6666ff, 25, 0x00bbbb, 50, 0x00ff00, 75, 0xffff00, 100,
        0xff0000};
    double[] stepColorScale = {0, 0x33ff33, 50, 0xffff33, 80, 0xff3333, 100};
    double[] highLowColorScale = {0, 0x6666ff, 70, Chart.Transparent, 100, 0xff0000};

    if (chartIndex == 0) {
        // Add the smooth color scale at the default position
        m.addColorScale(smoothColorScale);
    } else if (chartIndex == 1) {
        // Add the high low scale at the default position
        m.addColorScale(highLowColorScale);
    } else if (chartIndex == 2) {
        // Add the smooth color scale starting at y = 43 (bottom of scale) with zero width and
        // ending at y = 23 with 20 pixels width
        m.addColorScale(smoothColorScale, 43, 0, 23, 20);
    } else {
        // Add the step color scale at the default position
        m.addColorScale(stepColorScale);
    }

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

    // Add a label left aligned to (10, 61) using 8pt Arial Bold font
    m.addText(10, 61, "Temperature C", "Arial Bold", 8, Chart.TextColor, Chart.Left);

    // Add a text box right aligned to (235, 61). Display the value using white (0xffffff) 8pt Arial
    // Bold font on a black (0x000000) background with depressed rounded border.
    TextBox t = m.addText(235, 61, m.formatValue(value, "2"), "Arial Bold", 8, 0xffffff, Chart.Right
        );
    t.setBackground(0x000000, 0x000000, -1);
    t.setRoundedCorners(3);

    // Output the chart
    return m.makeSession(request, "chart" + chartIndex);
}
%>
<%
String chart0URL = createChart(request, 0);
String chart1URL = createChart(request, 1);
String chart2URL = createChart(request, 2);
String chart3URL = createChart(request, 3);
%>
<html>
<body style="margin:5px 0px 0px 5px">
<div style="font-size:18pt; font-family:verdana; font-weight:bold">
    White Horizontal Linear Meters
</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?"+chart0URL)%>'>
<img src='<%=response.encodeURL("getchart.jsp?"+chart1URL)%>'>
<img src='<%=response.encodeURL("getchart.jsp?"+chart2URL)%>'>
<img src='<%=response.encodeURL("getchart.jsp?"+chart3URL)%>'>
</body>
</html>

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

public class whitehlinearmeter implements DemoModule
{
    //Name of demo program
    public String toString() { return "White Horizontal Linear Meters"; }

    //Number of charts produced in this demo
    public int getNoOfCharts() { return 4; }

    //Main code for creating charts
    public void createChart(ChartViewer viewer, int chartIndex)
    {
        // The value to display on the meter
        double value = 74.25;

        // Create a LinearMeter object of size 250 x 75 pixels with very light grey (0xeeeeee)
        // backgruond and a light grey (0xccccccc) 3-pixel thick rounded frame
        LinearMeter m = new LinearMeter(250, 75, 0xeeeeee, 0xcccccc);
        m.setRoundedFrame(Chart.Transparent);
        m.setThickFrame(3);

        // Set the scale region top-left corner at (14, 23), with size of 218 x 20 pixels. The scale
        // labels are located on the top (implies horizontal meter)
        m.setMeter(14, 23, 218, 20, Chart.Top);

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

        // Demostrate different types of color scales and putting them at different positions
        double[] smoothColorScale = {0, 0x6666ff, 25, 0x00bbbb, 50, 0x00ff00, 75, 0xffff00, 100,
            0xff0000};
        double[] stepColorScale = {0, 0x33ff33, 50, 0xffff33, 80, 0xff3333, 100};
        double[] highLowColorScale = {0, 0x6666ff, 70, Chart.Transparent, 100, 0xff0000};

        if (chartIndex == 0) {
            // Add the smooth color scale at the default position
            m.addColorScale(smoothColorScale);
        } else if (chartIndex == 1) {
            // Add the high low scale at the default position
            m.addColorScale(highLowColorScale);
        } else if (chartIndex == 2) {
            // Add the smooth color scale starting at y = 43 (bottom of scale) with zero width and
            // ending at y = 23 with 20 pixels width
            m.addColorScale(smoothColorScale, 43, 0, 23, 20);
        } else {
            // Add the step color scale at the default position
            m.addColorScale(stepColorScale);
        }

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

        // Add a label left aligned to (10, 61) using 8pt Arial Bold font
        m.addText(10, 61, "Temperature C", "Arial Bold", 8, Chart.TextColor, Chart.Left);

        // Add a text box right aligned to (235, 61). Display the value using white (0xffffff) 8pt
        // Arial Bold font on a black (0x000000) background with depressed rounded border.
        TextBox t = m.addText(235, 61, m.formatValue(value, "2"), "Arial Bold", 8, 0xffffff,
            Chart.Right);
        t.setBackground(0x000000, 0x000000, -1);
        t.setRoundedCorners(3);

        // 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 whitehlinearmeter();

        //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);
    }
}