Color Round Meters

[Web Version (in ASP)] aspdemo\colorroundmeter.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

    ' The background and border colors of the meters
    bgColor = Array(&H88ccff, &Hffdddd, &Hffddaa, &Hffccff, &Hdddddd, &Hccffcc)
    borderColor = Array(&H000077, &H880000, &Hee6600, &H440088, &H000000, &H006000)

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

    ' 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, 111, -140, 140)
    Else
        ' Center at (125, 125), scale radius = 111 pixels, scale angle -180 to +90 degrees
         Call m.setMeter(125, 125, 111, -180, 90)
    End If

    ' Background gradient color with brighter color at the center
    bgGradient = Array(0, m.adjustBrightness(bgColor(chartIndex), 3), 0.75, bgColor(chartIndex))
    ' Add circle with radius 123 pixels as background using the background gradient
    Call m.addRing(0, 123, m.relativeRadialGradient(bgGradient))
    ' Add a ring between radii 116 and 123 pixels as border
    Call m.addRing(116, 123, borderColor(chartIndex))

    ' 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 green, yellow and red zones between radii 44 and 60
        Call m.addZone(0, 60, 44, 60, &H00dd00)
        Call m.addZone(60, 80, 44, 60, &Hffff00)
        Call m.addZone(80, 100, 44, 60, &Hff0000)
    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 black (0x000000) 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(&H000000)
        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>Color 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;">
        Color 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\colorroundmeter.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

    ' The background and border colors of the meters
    Dim bgColor()
    bgColor = Array(&H88ccff, &Hffdddd, &Hffddaa, &Hffccff, &Hdddddd, &Hccffcc)
    Dim borderColor()
    borderColor = Array(&H000077, &H880000, &Hee6600, &H440088, &H000000, &H006000)

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

    ' 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, 111, -140, 140)
    Else
        ' Center at (125, 125), scale radius = 111 pixels, scale angle -180 to +90 degrees
         Call m.setMeter(125, 125, 111, -180, 90)
    End If

    ' Background gradient color with brighter color at the center
    Dim bgGradient()
    bgGradient = Array(0, m.adjustBrightness(bgColor(chartIndex), 3), 0.75, bgColor(chartIndex))
    ' Add circle with radius 123 pixels as background using the background gradient
    Call m.addRing(0, 123, m.relativeRadialGradient(bgGradient))
    ' Add a ring between radii 116 and 123 pixels as border
    Call m.addRing(116, 123, borderColor(chartIndex))

    ' 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 green, yellow and red zones between radii 44 and 60
        Call m.addZone(0, 60, 44, 60, &H00dd00)
        Call m.addZone(60, 80, 44, 60, &Hffff00)
        Call m.addZone(80, 100, 44, 60, &Hff0000)
    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 black (0x000000) 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(&H000000)
        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