ChartDirector 6.1 (Java Edition)

Angular Meter Pointers (2)




This example demonstrates adding multiple new style pointers of different styles to a meter.

For angular meters, classical pointers are added using BaseMeter.addPointer, while new style pointers are added using AngularMeter.addPointer2.

When compared to classical pointers, new style pointers are thinner. They are designed to be used with the new style meter cap (the circular object at the center), which is larger than the classical pointer cap, and is configurable using AngularMeter.setCap2. The base and tip of the new style pointer can move independently in the radial direction, which means the pointer can be detached from the center, and can even points from the outside inwards.

Source Code Listing

[JSP Version] jspdemo/angularpointer2.jsp
<%@page import="ChartDirector.*" %>
<%
// Create an AngularMeter object of size 300 x 300 pixels with transparent background
AngularMeter m = new AngularMeter(300, 300, Chart.Transparent);

// Set the default text and line colors to white (0xffffff)
m.setColor(Chart.TextColor, 0xffffff);
m.setColor(Chart.LineColor, 0xffffff);

// Center at (150, 150), scale radius = 125 pixels, scale angle 0 to 360 degrees
m.setMeter(150, 150, 125, 0, 360);

// Add a black (0x000000) circle with radius 148 pixels as background
m.addRing(0, 148, 0x000000);

// Add a ring between radii 139 and 147 pixels using the silver color with a light grey (0xcccccc)
// edge as border
m.addRing(139, 147, Chart.silverColor(), 0xcccccc);

// Meter scale is 0 - 100, with major/minor/micro ticks every 10/5/1 units
m.setScale(0, 100, 10, 5, 1);

// Set the scale label style to 16pt Arial Italic. Set the major/minor/micro tick lengths to 13/10/7
// pixels pointing inwards, and their widths to 2/1/1 pixels.
m.setLabelStyle("Arial Italic", 16);
m.setTickLength(-13, -10, -7);
m.setLineWidth(0, 2, 1, 1);

// Add a default red (0xff0000) pointer
m.addPointer2(25, 0xff0000);

// Add a semi-transparent green (0x3f00ff00) line style pointer
m.addPointer2(9, 0x3f00ff00, -1, Chart.LinePointer2);

// Add a semi-transparent blue (0x7f66aaff) triangular pointer floating between 60% and 85% of the
// scale radius with the pointer width 5 times the default
m.addPointer2(52, 0x7f66aaff, 0x66aaff, Chart.TriangularPointer2, 0.6, 0.85, 5);

// Add a semi-transparent yellow (0x7fffff66) triangular pointer floating between 80% and 90% of the
// scale radius with the pointer width 5 times the default
m.addPointer2(65, 0x7fffff66, 0xffff66, Chart.TriangularPointer2, 0.8, 0.9, 5);

// Add two red (0xff0000) triangular pointer at 72 and 94. The pointers float between 110% and 100%
// of the scale radius with widths 3 times the default
m.addPointer2(72, 0xff0000, -1, Chart.TriangularPointer2, 1.1, 1.0, 3);
m.addPointer2(94, 0xff0000, -1, Chart.TriangularPointer2, 1.1, 1.0, 3);

// Add a red (0xcc0000) zone spanning from 72 to 94, and between the radii 112 and 125
m.addZone(72, 94, 125, 112, 0xcc0000);

// 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">
    Angular Meter Pointers (2)
</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/angularpointer2.java
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import ChartDirector.*;

public class angularpointer2 implements DemoModule
{
    //Name of demo program
    public String toString() { return "Angular Meter Pointers (2)"; }

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

    //Main code for creating charts
    public void createChart(ChartViewer viewer, int chartIndex)
    {
        // Create an AngularMeter object of size 300 x 300 pixels with transparent background
        AngularMeter m = new AngularMeter(300, 300, Chart.Transparent);

        // Set the default text and line colors to white (0xffffff)
        m.setColor(Chart.TextColor, 0xffffff);
        m.setColor(Chart.LineColor, 0xffffff);

        // Center at (150, 150), scale radius = 125 pixels, scale angle 0 to 360 degrees
        m.setMeter(150, 150, 125, 0, 360);

        // Add a black (0x000000) circle with radius 148 pixels as background
        m.addRing(0, 148, 0x000000);

        // Add a ring between radii 139 and 147 pixels using the silver color with a light grey
        // (0xcccccc) edge as border
        m.addRing(139, 147, Chart.silverColor(), 0xcccccc);

        // Meter scale is 0 - 100, with major/minor/micro ticks every 10/5/1 units
        m.setScale(0, 100, 10, 5, 1);

        // Set the scale label style to 16pt Arial Italic. Set the major/minor/micro tick lengths to
        // 13/10/7 pixels pointing inwards, and their widths to 2/1/1 pixels.
        m.setLabelStyle("Arial Italic", 16);
        m.setTickLength(-13, -10, -7);
        m.setLineWidth(0, 2, 1, 1);

        // Add a default red (0xff0000) pointer
        m.addPointer2(25, 0xff0000);

        // Add a semi-transparent green (0x3f00ff00) line style pointer
        m.addPointer2(9, 0x3f00ff00, -1, Chart.LinePointer2);

        // Add a semi-transparent blue (0x7f66aaff) triangular pointer floating between 60% and 85%
        // of the scale radius with the pointer width 5 times the default
        m.addPointer2(52, 0x7f66aaff, 0x66aaff, Chart.TriangularPointer2, 0.6, 0.85, 5);

        // Add a semi-transparent yellow (0x7fffff66) triangular pointer floating between 80% and
        // 90% of the scale radius with the pointer width 5 times the default
        m.addPointer2(65, 0x7fffff66, 0xffff66, Chart.TriangularPointer2, 0.8, 0.9, 5);

        // Add two red (0xff0000) triangular pointer at 72 and 94. The pointers float between 110%
        // and 100% of the scale radius with widths 3 times the default
        m.addPointer2(72, 0xff0000, -1, Chart.TriangularPointer2, 1.1, 1.0, 3);
        m.addPointer2(94, 0xff0000, -1, Chart.TriangularPointer2, 1.1, 1.0, 3);

        // Add a red (0xcc0000) zone spanning from 72 to 94, and between the radii 112 and 125
        m.addZone(72, 94, 125, 112, 0xcc0000);

        // 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 angularpointer2();

        //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);
    }
}