ChartDirector 6.2 (.NET Edition)

Horizontal Bar Meter




This example demonstrates the basic steps in creating a horizontal bar meter.

A horizontal bar meter can be created using the following steps:

Source Code Listing

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

namespace CSharpChartExplorer
{
    public class hbarmeter : DemoModule
    {
        //Name of demo module
        public string getName() { return "Horizontal Bar 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 = 75.35;

            // Create an LinearMeter object of size 260 x 66 pixels with a very light grey
            // (0xeeeeee) background, and a rounded 3-pixel thick light grey (0xaaaaaa) border
            LinearMeter m = new LinearMeter(260, 66, 0xeeeeee, 0xaaaaaa);
            m.setRoundedFrame(Chart.Transparent);
            m.setThickFrame(3);

            // Set the scale region top-left corner at (18, 24), with size of 222 x 20 pixels. The
            // scale labels are located on the top (implies horizontal meter)
            m.setMeter(18, 24, 222, 20, Chart.Top);

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

            // Add a 5-pixel thick smooth color scale to the meter at y = 48 (below the meter scale)
            double[] smoothColorScale = {0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xffff00, 100,
                0xff0000};
            m.addColorScale(smoothColorScale, 48, 5);

            // Add a light blue (0x0088ff) bar from 0 to the data value with glass effect and 4
            // pixel rounded corners
            m.addBar(0, value, 0x0088ff, Chart.glassEffect(Chart.NormalGlare, Chart.Top), 4);

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

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

Public Class hbarmeter
    Implements DemoModule

    'Name of demo module
    Public Function getName() As String Implements DemoModule.getName
        Return "Horizontal Bar 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 = 75.35

        ' Create an LinearMeter object of size 260 x 66 pixels with a very light grey (0xeeeeee)
        ' background, and a rounded 3-pixel thick light grey (0xaaaaaa) border
        Dim m As LinearMeter = New LinearMeter(260, 66, &Heeeeee, &Haaaaaa)
        m.setRoundedFrame(Chart.Transparent)
        m.setThickFrame(3)

        ' Set the scale region top-left corner at (18, 24), with size of 222 x 20 pixels. The scale
        ' labels are located on the top (implies horizontal meter)
        m.setMeter(18, 24, 222, 20, Chart.Top)

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

        ' Add a 5-pixel thick smooth color scale to the meter at y = 48 (below the meter scale)
        Dim smoothColorScale() As Double = {0, &H0000ff, 25, &H0088ff, 50, &H00ff00, 75, &Hffff00, _
            100, &Hff0000}
        m.addColorScale(smoothColorScale, 48, 5)

        ' Add a light blue (0x0088ff) bar from 0 to the data value with glass effect and 4 pixel
        ' rounded corners
        m.addBar(0, value, &H0088ff, Chart.glassEffect(Chart.NormalGlare, Chart.Top), 4)

        ' Output the chart
        viewer.Chart = m

    End Sub

End Class

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

namespace CSharpWPFDemo
{
    public class hbarmeter : DemoModule
    {
        //Name of demo module
        public string getName() { return "Horizontal Bar 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 = 75.35;

            // Create an LinearMeter object of size 260 x 66 pixels with a very light grey
            // (0xeeeeee) background, and a rounded 3-pixel thick light grey (0xaaaaaa) border
            LinearMeter m = new LinearMeter(260, 66, 0xeeeeee, 0xaaaaaa);
            m.setRoundedFrame(Chart.Transparent);
            m.setThickFrame(3);

            // Set the scale region top-left corner at (18, 24), with size of 222 x 20 pixels. The
            // scale labels are located on the top (implies horizontal meter)
            m.setMeter(18, 24, 222, 20, Chart.Top);

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

            // Add a 5-pixel thick smooth color scale to the meter at y = 48 (below the meter scale)
            double[] smoothColorScale = {0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xffff00, 100,
                0xff0000};
            m.addColorScale(smoothColorScale, 48, 5);

            // Add a light blue (0x0088ff) bar from 0 to the data value with glass effect and 4
            // pixel rounded corners
            m.addBar(0, value, 0x0088ff, Chart.glassEffect(Chart.NormalGlare, Chart.Top), 4);

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

[ASP.NET Web Forms - C# version] NetWebCharts\CSharpASP\hbarmeter.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 = 75.35;

    // Create an LinearMeter object of size 260 x 66 pixels with a very light grey (0xeeeeee)
    // background, and a rounded 3-pixel thick light grey (0xaaaaaa) border
    LinearMeter m = new LinearMeter(260, 66, 0xeeeeee, 0xaaaaaa);
    m.setRoundedFrame(Chart.Transparent);
    m.setThickFrame(3);

    // Set the scale region top-left corner at (18, 24), with size of 222 x 20 pixels. The scale
    // labels are located on the top (implies horizontal meter)
    m.setMeter(18, 24, 222, 20, Chart.Top);

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

    // Add a 5-pixel thick smooth color scale to the meter at y = 48 (below the meter scale)
    double[] smoothColorScale = {0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xffff00, 100,
        0xff0000};
    m.addColorScale(smoothColorScale, 48, 5);

    // Add a light blue (0x0088ff) bar from 0 to the data value with glass effect and 4 pixel
    // rounded corners
    m.addBar(0, value, 0x0088ff, Chart.glassEffect(Chart.NormalGlare, Chart.Top), 4);

    // 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\hbarmeter.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 = 75.35

    ' Create an LinearMeter object of size 260 x 66 pixels with a very light grey (0xeeeeee)
    ' background, and a rounded 3-pixel thick light grey (0xaaaaaa) border
    Dim m As LinearMeter = New LinearMeter(260, 66, &Heeeeee, &Haaaaaa)
    m.setRoundedFrame(Chart.Transparent)
    m.setThickFrame(3)

    ' Set the scale region top-left corner at (18, 24), with size of 222 x 20 pixels. The scale
    ' labels are located on the top (implies horizontal meter)
    m.setMeter(18, 24, 222, 20, Chart.Top)

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

    ' Add a 5-pixel thick smooth color scale to the meter at y = 48 (below the meter scale)
    Dim smoothColorScale() As Double = {0, &H0000ff, 25, &H0088ff, 50, &H00ff00, 75, &Hffff00, _
        100, &Hff0000}
    m.addColorScale(smoothColorScale, 48, 5)

    ' Add a light blue (0x0088ff) bar from 0 to the data value with glass effect and 4 pixel rounded
    ' corners
    m.addBar(0, value, &H0088ff, Chart.glassEffect(Chart.NormalGlare, Chart.Top), 4)

    ' 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\HbarmeterController.cs
using System;
using System.Web.Mvc;
using ChartDirector;

namespace NetMvcCharts.Controllers
{
    public class HbarmeterController : Controller
    {
        //
        // Default Action
        //
        public ActionResult Index()
        {
            ViewBag.Title = "Horizontal Bar 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 = 75.35;

            // Create an LinearMeter object of size 260 x 66 pixels with a very light grey (0xeeeeee)
            // background, and a rounded 3-pixel thick light grey (0xaaaaaa) border
            LinearMeter m = new LinearMeter(260, 66, 0xeeeeee, 0xaaaaaa);
            m.setRoundedFrame(Chart.Transparent);
            m.setThickFrame(3);

            // Set the scale region top-left corner at (18, 24), with size of 222 x 20 pixels. The scale
            // labels are located on the top (implies horizontal meter)
            m.setMeter(18, 24, 222, 20, Chart.Top);

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

            // Add a 5-pixel thick smooth color scale to the meter at y = 48 (below the meter scale)
            double[] smoothColorScale = {0, 0x0000ff, 25, 0x0088ff, 50, 0x00ff00, 75, 0xffff00, 100,
                0xff0000};
            m.addColorScale(smoothColorScale, 48, 5);

            // Add a light blue (0x0088ff) bar from 0 to the data value with glass effect and 4 pixel
            // rounded corners
            m.addBar(0, value, 0x0088ff, Chart.glassEffect(Chart.NormalGlare, Chart.Top), 4);

            // 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>