ChartDirector 6.2 (.NET Edition)

Icon Angular Meter




This example demonstrates a fuel-tank like meters, in which the meter is labelled by an icon and the scale shows text abbreviations.

The scale labels on the meter is created by using BaseMeter.setScale2. The icon is created by adding a text box with BaseChart.addText and using CDML to specify an icon.

Source Code Listing

[Windows Forms - C# version] NetWinCharts\CSharpWinCharts\iconameter.cs
using System;
using ChartDirector;

namespace CSharpChartExplorer
{
    public class iconameter : DemoModule
    {
        //Name of demo module
        public string getName() { return "Icon Angular Meter"; }

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

        //Main code for creating chart.
        //Note: the argument chartIndex is unused because this demo only has 1 chart.
        public void createChart(WinChartViewer viewer, int chartIndex)
        {
            // The value to display on the meter
            double value = 85;

            // Create an AugularMeter object of size 70 x 90 pixels, using black background with a 2
            // pixel 3D depressed border.
            AngularMeter m = new AngularMeter(70, 90, 0, 0, -2);

            // Use white on black color palette for default text and line colors
            m.setColors(Chart.whiteOnBlackPalette);

            // Set the meter center at (10, 45), with radius 50 pixels, and span from 135 to 45
            // degrees
            m.setMeter(10, 45, 50, 135, 45);

            // Set meter scale from 0 - 100, with the specified labels
            m.setScale2(0, 100, new string[] {"E", " ", " ", " ", "F"});

            // Set the angular arc and major tick width to 2 pixels
            m.setLineWidth(2, 2);

            // Add a red zone at 0 - 15
            m.addZone(0, 15, 0xff3333);

            // Add an icon at (25, 35)
            m.addText(25, 35, "<*img=gas.gif*>");

            // Add a yellow (ffff00) pointer at the specified value
            m.addPointer(value, 0xffff00);

            // Output the chart
            viewer.Chart = m;
        }
    }
}

[Windows Forms - VB Version] NetWinCharts\VBNetWinCharts\iconameter.vb
Imports System
Imports Microsoft.VisualBasic
Imports ChartDirector

Public Class iconameter
    Implements DemoModule

    'Name of demo module
    Public Function getName() As String Implements DemoModule.getName
        Return "Icon Angular Meter"
    End Function

    'Number of charts produced in this demo module
    Public Function getNoOfCharts() As Integer Implements DemoModule.getNoOfCharts
        Return 1
    End Function

    'Main code for creating chart.
    'Note: the argument chartIndex is unused because this demo only has 1 chart.
    Public Sub createChart(viewer As WinChartViewer, chartIndex As Integer) _
        Implements DemoModule.createChart

        ' The value to display on the meter
        Dim value As Double = 85

        ' Create an AugularMeter object of size 70 x 90 pixels, using black background with a 2
        ' pixel 3D depressed border.
        Dim m As AngularMeter = New AngularMeter(70, 90, 0, 0, -2)

        ' Use white on black color palette for default text and line colors
        m.setColors(Chart.whiteOnBlackPalette)

        ' Set the meter center at (10, 45), with radius 50 pixels, and span from 135 to 45 degrees
        m.setMeter(10, 45, 50, 135, 45)

        ' Set meter scale from 0 - 100, with the specified labels
        m.setScale2(0, 100, New String() {"E", " ", " ", " ", "F"})

        ' Set the angular arc and major tick width to 2 pixels
        m.setLineWidth(2, 2)

        ' Add a red zone at 0 - 15
        m.addZone(0, 15, &Hff3333)

        ' Add an icon at (25, 35)
        m.addText(25, 35, "<*img=gas.gif*>")

        ' Add a yellow (ffff00) pointer at the specified value
        m.addPointer(value, &Hffff00)

        ' Output the chart
        viewer.Chart = m

    End Sub

End Class

[WPF - C#] NetWPFCharts\iconameter.cs
using System;
using ChartDirector;

namespace CSharpWPFDemo
{
    public class iconameter : DemoModule
    {
        //Name of demo module
        public string getName() { return "Icon Angular Meter"; }

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

        //Main code for creating chart.
        //Note: the argument chartIndex is unused because this demo only has 1 chart.
        public void createChart(WPFChartViewer viewer, int chartIndex)
        {
            // The value to display on the meter
            double value = 85;

            // Create an AugularMeter object of size 70 x 90 pixels, using black background with a 2
            // pixel 3D depressed border.
            AngularMeter m = new AngularMeter(70, 90, 0, 0, -2);

            // Use white on black color palette for default text and line colors
            m.setColors(Chart.whiteOnBlackPalette);

            // Set the meter center at (10, 45), with radius 50 pixels, and span from 135 to 45
            // degrees
            m.setMeter(10, 45, 50, 135, 45);

            // Set meter scale from 0 - 100, with the specified labels
            m.setScale2(0, 100, new string[] {"E", " ", " ", " ", "F"});

            // Set the angular arc and major tick width to 2 pixels
            m.setLineWidth(2, 2);

            // Add a red zone at 0 - 15
            m.addZone(0, 15, 0xff3333);

            // Add an icon at (25, 35)
            m.addText(25, 35, "<*img=gas.gif*>");

            // Add a yellow (ffff00) pointer at the specified value
            m.addPointer(value, 0xffff00);

            // Output the chart
            viewer.Chart = m;
        }
    }
}

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\iconameter.aspx
(Click here on how to convert this code to code-behind style.)
<%@ Page Language="C#" Debug="true" %>
<%@ Import Namespace="ChartDirector" %>
<%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %>

<!DOCTYPE html>

<script runat="server">

//
// Page Load event handler
//
protected void Page_Load(object sender, EventArgs e)
{
    // The value to display on the meter
    double value = 85;

    // Create an AugularMeter object of size 70 x 90 pixels, using black background with a 2 pixel
    // 3D depressed border.
    AngularMeter m = new AngularMeter(70, 90, 0, 0, -2);

    //Set default directory for loading images from current script directory
    m.setSearchPath(Server.MapPath("."));

    // Use white on black color palette for default text and line colors
    m.setColors(Chart.whiteOnBlackPalette);

    // Set the meter center at (10, 45), with radius 50 pixels, and span from 135 to 45 degrees
    m.setMeter(10, 45, 50, 135, 45);

    // Set meter scale from 0 - 100, with the specified labels
    m.setScale2(0, 100, new string[] {"E", " ", " ", " ", "F"});

    // Set the angular arc and major tick width to 2 pixels
    m.setLineWidth(2, 2);

    // Add a red zone at 0 - 15
    m.addZone(0, 15, 0xff3333);

    // Add an icon at (25, 35)
    m.addText(25, 35, "<*img=gas.gif*>");

    // Add a yellow (ffff00) pointer at the specified value
    m.addPointer(value, 0xffff00);

    // Output the chart
    WebChartViewer1.Image = m.makeWebImage(Chart.PNG);
}

</script>

<html>
<body>
    <chart:WebChartViewer id="WebChartViewer1" runat="server" />
</body>
</html>

[ASP.NET Web Forms - VB Version] NetWebCharts\VBNetASP\iconameter.aspx
(Click here on how to convert this code to code-behind style.)
<%@ Page Language="VB" Debug="true" %>
<%@ Import Namespace="ChartDirector" %>
<%@ Register TagPrefix="chart" Namespace="ChartDirector" Assembly="netchartdir" %>

<!DOCTYPE html>

<script runat="server">

'
' Page Load event handler
'
Protected Sub Page_Load(ByVal sender As System.Object, ByVal e As System.EventArgs)

    ' The value to display on the meter
    Dim value As Double = 85

    ' Create an AugularMeter object of size 70 x 90 pixels, using black background with a 2 pixel 3D
    ' depressed border.
    Dim m As AngularMeter = New AngularMeter(70, 90, 0, 0, -2)

    ' Set default directory for loading images from current script directory
    Call m.setSearchPath(Server.MapPath("."))

    ' Use white on black color palette for default text and line colors
    m.setColors(Chart.whiteOnBlackPalette)

    ' Set the meter center at (10, 45), with radius 50 pixels, and span from 135 to 45 degrees
    m.setMeter(10, 45, 50, 135, 45)

    ' Set meter scale from 0 - 100, with the specified labels
    m.setScale2(0, 100, New String() {"E", " ", " ", " ", "F"})

    ' Set the angular arc and major tick width to 2 pixels
    m.setLineWidth(2, 2)

    ' Add a red zone at 0 - 15
    m.addZone(0, 15, &Hff3333)

    ' Add an icon at (25, 35)
    m.addText(25, 35, "<*img=gas.gif*>")

    ' Add a yellow (ffff00) pointer at the specified value
    m.addPointer(value, &Hffff00)

    ' Output the chart
    WebChartViewer1.Image = m.makeWebImage(Chart.PNG)

End Sub

</script>

<html>
<body>
    <chart:WebChartViewer id="WebChartViewer1" runat="server" />
</body>
</html>

[ASP.NET MVC - Controller] NetMvcCharts\Controllers\IconameterController.cs
using System;
using System.Web.Mvc;
using ChartDirector;

namespace NetMvcCharts.Controllers
{
    public class IconameterController : Controller
    {
        //
        // Default Action
        //
        public ActionResult Index()
        {
            ViewBag.Title = "Icon Angular Meter";
            createChart(ViewBag.Viewer = new RazorChartViewer(HttpContext, "chart1"));
            return View("~/Views/Shared/ChartView.cshtml");
        }

        //
        // Create chart
        //
        private void createChart(RazorChartViewer viewer)
        {
            // The value to display on the meter
            double value = 85;

            // Create an AugularMeter object of size 70 x 90 pixels, using black background with a 2
            // pixel 3D depressed border.
            AngularMeter m = new AngularMeter(70, 90, 0, 0, -2);

            //Set default directory for loading images
            m.setSearchPath(Url.Content("~/Content"));

            // Use white on black color palette for default text and line colors
            m.setColors(Chart.whiteOnBlackPalette);

            // Set the meter center at (10, 45), with radius 50 pixels, and span from 135 to 45 degrees
            m.setMeter(10, 45, 50, 135, 45);

            // Set meter scale from 0 - 100, with the specified labels
            m.setScale2(0, 100, new string[] {"E", " ", " ", " ", "F"});

            // Set the angular arc and major tick width to 2 pixels
            m.setLineWidth(2, 2);

            // Add a red zone at 0 - 15
            m.addZone(0, 15, 0xff3333);

            // Add an icon at (25, 35)
            m.addText(25, 35, "<*img=gas.gif*>");

            // Add a yellow (ffff00) pointer at the specified value
            m.addPointer(value, 0xffff00);

            // Output the chart
            viewer.Image = m.makeWebImage(Chart.PNG);
        }
    }
}

[ASP.NET MVC - View] NetMvcCharts\Views\Shared\ChartView.cshtml
@{ Layout = null; }

<!DOCTYPE html>

<html>
<head>
    <meta name="viewport" content="width=device-width" />
    <title>@ViewBag.Title</title>
</head>
<body style="margin:5px 0px 0px 5px">
    <div style="font:bold 18pt verdana;">
        @ViewBag.Title
    </div>
    <hr style="border:solid 1px #000080" />
    <div>
        @{
            if (ViewBag.Viewer is Array)
            {
                // Display multiple charts
                for (int i = 0; i < ViewBag.Viewer.Length; ++i)
                {
                    @:@Html.Raw(ViewBag.Viewer[i].RenderHTML())
                }
            }
            else
            {
                // Display one chart only
                @:@Html.Raw(ViewBag.Viewer.RenderHTML())
            }
        }
    </div>
</body>
</html>