White Round Meters

[Web Version (in ASP)] aspdemo\whiteroundmeter.asp

<%@ language="vbscript" %>
<%
Set cd = CreateObject("ChartDirector.API")

' This script can draw different charts depending on the chartIndex
Sub createChart(viewer, chartIndex)

    ' The value to display on the meter
    value = 72.3

    ' Create an AngularMeter object of size 250 x 250 pixels with transparent background
    Set m = cd.AngularMeter(250, 250, cd.Transparent)

    ' Set the default text and line colors to dark grey (0x333333)
    Call m.setColor(cd.TextColor, &H333333)
    Call m.setColor(cd.LineColor, &H333333)

    ' Demonstration two different meter scale angles
    If chartIndex Mod 2 = 0 Then
        ' Center at (125, 125), scale radius = 111 pixels, scale angle -140 to +140 degrees
        Call m.setMeter(125, 125, 109, -140, 140)
    Else
        ' Center at (125, 125), scale radius = 111 pixels, scale angle -180 to +90 degrees
         Call m.setMeter(125, 125, 109, -180, 90)
    End If

    ' Add a black (0x000000) circle with radius 123 pixels as background
    Call m.addRing(0, 123, &H000000)

    ' Background gradient color from white (0xffffff) at the center to light grey (0xdddddd) at the
    ' border
    bgGradient = Array(0, &Hffffff, 0.75, &Heeeeee, 1, &Hdddddd)
    ' Add circle with radius 123 pixels as background using the background gradient
    Call m.addRing(0, 123, m.relativeRadialGradient(bgGradient, 123))

    ' Gradient color for the border to make it silver-like
    ringGradient = Array(1, &H999999, 0.5, &Hdddddd, 0, &Hffffff, -0.5, &Hdddddd, -1, &H999999)
    ' Add a ring between radii 114 and 123 pixels using the silver gradient with a light grey
    ' (0xbbbbbb) edge as the meter border
    Call m.addRing(114, 123, m.relativeLinearGradient(ringGradient, 45, 123), &Hbbbbbb)

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

    ' Set the scale label style to 15pt Arial Italic. Set the major/minor/micro tick lengths to
    ' 12/9/6 pixels pointing inwards, and their widths to 2/1/1 pixels.
    Call m.setLabelStyle("Arial Italic", 15)
    Call m.setTickLength(-12, -9, -6)
    Call m.setLineWidth(0, 2, 1, 1)

    ' Demostrate different types of color scales and putting them at different positions
    smoothColorScale = Array(0, &H3333ff, 25, &H0088ff, 50, &H00ff00, 75, &Hdddd00, 100, &Hff0000)
    stepColorScale = Array(0, &H00cc00, 60, &Hffdd00, 80, &Hee0000, 100)
    highLowColorScale = Array(0, &H00ff00, 70, cd.Transparent, 100, &Hff0000)

    If chartIndex = 0 Then
        ' Add the smooth color scale at the default position
        Call m.addColorScale(smoothColorScale)
    ElseIf chartIndex = 1 Then
        ' Add the smooth color scale starting at radius 62 with zero width and ending at radius 40
        ' with 22 pixels outer width
        Call m.addColorScale(smoothColorScale, 62, 0, 40, 22)
    ElseIf chartIndex = 2 Then
        ' Add the smooth color scale starting at radius 109 with zero width and ending at radius 109
        ' with 12 pixels inner width
        Call m.addColorScale(smoothColorScale, 109, 0, 109, -12)
    ElseIf chartIndex = 3 Then
        ' Add the high/low color scale at the default position
        Call m.addColorScale(highLowColorScale)
    ElseIf chartIndex = 4 Then
        ' Add the smooth color scale at radius 44 with 16 pixels outer width
        Call m.addColorScale(smoothColorScale, 44, 16)
    Else
        ' Add the step color scale at the default position
        Call m.addColorScale(stepColorScale)
    End If

    ' Add a text label centered at (125, 175) with 15pt Arial Italic font
    Call m.addText(125, 175, "CPU", "Arial Italic", 15, cd.TextColor, cd.Center)

    ' Add a readout to some of the charts as demonstration
    If (chartIndex = 0) Or (chartIndex = 2) Then
        ' Put the value label center aligned at (125, 232), using white (0xffffff) 14pt Arial font
        ' on a dark grey (0x222222) background. Set box width to 50 pixels with 5 pixels rounded
        ' corners.
        Set t = m.addText(125, 232, m.formatValue(value, _
            "<*block,width=50,halign=center*>{value|1}"), "Arial", 14, &Hffffff, cd.BottomCenter)
        Call t.setBackground(&H222222)
        Call t.setRoundedCorners(5)
    End If

    ' Add a red (0xff0000) pointer at the specified value
    Call m.addPointer2(value, &Hff0000)

    ' Output the chart
    Call viewer.setChart(m, cd.SVG)
End Sub

' This example includes 6 charts
Dim viewers(5)
For i = 0 To Ubound(viewers)
    Set viewers(i) = cd.WebChartViewer(Request, "chart" & i)
    Call createChart(viewers(i), i)
Next
%>

<!DOCTYPE html>
<html>
<head>
    <title>White Round Meters</title>
    <!-- Include ChartDirector Javascript Library to support chart interactions -->
    <script type="text/javascript" src="cdjcv.js"></script>
</head>
<body style="margin:5px 0px 0px 5px">
    <div style="font:bold 18pt verdana;">
        White Round Meters
    </div>
    <hr style="border:solid 1px #000080; background:#000080" />
    <div style="font:10pt verdana; margin-bottom:1.5em">
        <a href="viewsource.asp?file=<%= Request("SCRIPT_NAME") %>">View Chart Source Code</a>
    </div>
    <!-- ****** Here are the chart images ****** -->
    <%
        For i = 0 To Ubound(viewers)
            Call Response.Write(viewers(i).renderHTML())
            Call Response.Write(" ")
        Next
    %>
</body>
</html>

[Windows Version (in Visual Basic)] vbdemo\whiteroundmeter.cls

Public Sub createChart(viewer As Object, chartIndex As Integer)

    Dim cd As New ChartDirector.API

    ' The value to display on the meter
    Dim value As Double
    value = 72.3

    ' Create an AngularMeter object of size 250 x 250 pixels
    Dim m As AngularMeter
    Set m = cd.AngularMeter(250, 250)

    ' Set the default text and line colors to dark grey (0x333333)
    Call m.setColor(cd.TextColor, &H333333)
    Call m.setColor(cd.LineColor, &H333333)

    ' Demonstration two different meter scale angles
    If chartIndex Mod 2 = 0 Then
        ' Center at (125, 125), scale radius = 111 pixels, scale angle -140 to +140 degrees
        Call m.setMeter(125, 125, 109, -140, 140)
    Else
        ' Center at (125, 125), scale radius = 111 pixels, scale angle -180 to +90 degrees
         Call m.setMeter(125, 125, 109, -180, 90)
    End If

    ' Add a black (0x000000) circle with radius 123 pixels as background
    Call m.addRing(0, 123, &H000000)

    ' Background gradient color from white (0xffffff) at the center to light grey (0xdddddd) at the
    ' border
    Dim bgGradient()
    bgGradient = Array(0, &Hffffff, 0.75, &Heeeeee, 1, &Hdddddd)
    ' Add circle with radius 123 pixels as background using the background gradient
    Call m.addRing(0, 123, m.relativeRadialGradient(bgGradient, 123))

    ' Gradient color for the border to make it silver-like
    Dim ringGradient()
    ringGradient = Array(1, &H999999, 0.5, &Hdddddd, 0, &Hffffff, -0.5, &Hdddddd, -1, &H999999)
    ' Add a ring between radii 114 and 123 pixels using the silver gradient with a light grey
    ' (0xbbbbbb) edge as the meter border
    Call m.addRing(114, 123, m.relativeLinearGradient(ringGradient, 45, 123), &Hbbbbbb)

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

    ' Set the scale label style to 15pt Arial Italic. Set the major/minor/micro tick lengths to
    ' 12/9/6 pixels pointing inwards, and their widths to 2/1/1 pixels.
    Call m.setLabelStyle("ariali.ttf", 15)
    Call m.setTickLength(-12, -9, -6)
    Call m.setLineWidth(0, 2, 1, 1)

    ' Demostrate different types of color scales and putting them at different positions
    Dim smoothColorScale()
    smoothColorScale = Array(0, &H3333ff, 25, &H0088ff, 50, &H00ff00, 75, &Hdddd00, 100, &Hff0000)
    Dim stepColorScale()
    stepColorScale = Array(0, &H00cc00, 60, &Hffdd00, 80, &Hee0000, 100)
    Dim highLowColorScale()
    highLowColorScale = Array(0, &H00ff00, 70, cd.Transparent, 100, &Hff0000)

    If chartIndex = 0 Then
        ' Add the smooth color scale at the default position
        Call m.addColorScale(smoothColorScale)
    ElseIf chartIndex = 1 Then
        ' Add the smooth color scale starting at radius 62 with zero width and ending at radius 40
        ' with 22 pixels outer width
        Call m.addColorScale(smoothColorScale, 62, 0, 40, 22)
    ElseIf chartIndex = 2 Then
        ' Add the smooth color scale starting at radius 109 with zero width and ending at radius 109
        ' with 12 pixels inner width
        Call m.addColorScale(smoothColorScale, 109, 0, 109, -12)
    ElseIf chartIndex = 3 Then
        ' Add the high/low color scale at the default position
        Call m.addColorScale(highLowColorScale)
    ElseIf chartIndex = 4 Then
        ' Add the smooth color scale at radius 44 with 16 pixels outer width
        Call m.addColorScale(smoothColorScale, 44, 16)
    Else
        ' Add the step color scale at the default position
        Call m.addColorScale(stepColorScale)
    End If

    ' Add a text label centered at (125, 175) with 15pt Arial Italic font
    Call m.addText(125, 175, "CPU", "ariali.ttf", 15, cd.TextColor, cd.Center)

    ' Add a readout to some of the charts as demonstration
    If chartIndex = 0 Or chartIndex = 2 Then
        ' Put the value label center aligned at (125, 232), using white (0xffffff) 14pt Arial font
        ' on a dark grey (0x222222) background. Set box width to 50 pixels with 5 pixels rounded
        ' corners.
        Dim t As ChartDirector.TextBox
        Set t = m.addText(125, 232, m.formatValue(value, _
            "<*block,width=50,halign=center*>{value|1}"), "arial.ttf", 14, &Hffffff, _
            cd.BottomCenter)
        Call t.setBackground(&H222222)
        Call t.setRoundedCorners(5)
    End If

    ' Add a red (0xff0000) pointer at the specified value
    Call m.addPointer2(value, &Hff0000)

    ' Output the chart
    Set viewer.Picture = m.makePicture()

End Sub