ChartDirector 7.0 (ASP/COM/VB Edition)
Semicircle Meter with Readout
Source Code Listing
<%@ 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 = 66
' The background and border colors of the meters
bgColor = Array(&H88ccff, &Hffdddd)
borderColor = Array(&H000077, &H880000)
' Create an AngularMeter object of size 300 x 200 pixels with transparent background
Set m = cd.AngularMeter(300, 200, cd.Transparent)
' Center at (150, 150), scale radius = 124 pixels, scale angle -90 to +90 degrees
Call m.setMeter(150, 150, 124, -90, 90)
' Background gradient color with brighter color at the center
bgGradient = Array(0, m.adjustBrightness(bgColor(chartIndex), 3), 0.75, bgColor(chartIndex))
' Add a scale background of 148 pixels radius using the background gradient, with a 13 pixel
' thick border
Call m.addScaleBackground(148, m.relativeRadialGradient(bgGradient), 13, borderColor( _
chartIndex))
' Meter scale is 0 - 100, with major tick every 20 units, minor tick every 10 units, and micro
' tick every 5 units
Call m.setScale(0, 100, 20, 10, 5)
' Set the scale label style to 15pt Arial Italic. Set the major/minor/micro tick lengths to
' 16/16/10 pixels pointing inwards, and their widths to 2/1/1 pixels.
Call m.setLabelStyle("Arial Italic", 16)
Call m.setTickLength(-16, -16, -10)
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)
If chartIndex = 0 Then
' Add the smooth color scale at the default position
Call m.addColorScale(smoothColorScale)
' Add a red (0xff0000) triangular pointer starting from 38% and ending at 60% of scale
' radius, with a width 6 times the default
Call m.addPointer2(value, &Hff0000, -1, cd.TriangularPointer2, 0.38, 0.6, 6)
Else
' Add the smooth color scale starting at radius 124 with zero width and ending at radius 124
' with 16 pixels inner width
Call m.addColorScale(smoothColorScale, 124, 0, 124, -16)
' Add a red (0xff0000) pointer
Call m.addPointer2(value, &Hff0000)
End If
' Configure a large "pointer cap" to be used as the readout circle at the center. The cap radius
' and border width is set to 33% and 4% of the meter scale radius. The cap color is dark blue
' (0x000044). The border color is light blue (0x66bbff) with a 60% brightness gradient effect.
Call m.setCap2(cd.Transparent, &H000044, &H66bbff, 0.6, 0, 0.33, 0.04)
' Add value label at the center with light blue (0x66ddff) 28pt Arial Italic font
Call m.addText(150, 150, m.formatValue(value, "{value|0}"), "Arial Italic", 28, &H66ddff, _
cd.Center).setMargin(0)
' Output the chart
Call viewer.setChart(m, cd.SVG)
End Sub
' This example includes 2 charts
Dim viewers(1)
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>Semicircle Meter with Readout</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;">
Semicircle Meter with Readout
</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>
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 = 66
' The background and border colors of the meters
Dim bgColor()
bgColor = Array(&H88ccff, &Hffdddd)
Dim borderColor()
borderColor = Array(&H000077, &H880000)
' Create an AngularMeter object of size 300 x 200 pixels
Dim m As AngularMeter
Set m = cd.AngularMeter(300, 200)
' Center at (150, 150), scale radius = 124 pixels, scale angle -90 to +90 degrees
Call m.setMeter(150, 150, 124, -90, 90)
' Background gradient color with brighter color at the center
Dim bgGradient()
bgGradient = Array(0, m.adjustBrightness(bgColor(chartIndex), 3), 0.75, bgColor(chartIndex))
' Add a scale background of 148 pixels radius using the background gradient, with a 13 pixel
' thick border
Call m.addScaleBackground(148, m.relativeRadialGradient(bgGradient), 13, borderColor( _
chartIndex))
' Meter scale is 0 - 100, with major tick every 20 units, minor tick every 10 units, and micro
' tick every 5 units
Call m.setScale(0, 100, 20, 10, 5)
' Set the scale label style to 15pt Arial Italic. Set the major/minor/micro tick lengths to
' 16/16/10 pixels pointing inwards, and their widths to 2/1/1 pixels.
Call m.setLabelStyle("ariali.ttf", 16)
Call m.setTickLength(-16, -16, -10)
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)
If chartIndex = 0 Then
' Add the smooth color scale at the default position
Call m.addColorScale(smoothColorScale)
' Add a red (0xff0000) triangular pointer starting from 38% and ending at 60% of scale
' radius, with a width 6 times the default
Call m.addPointer2(value, &Hff0000, -1, cd.TriangularPointer2, 0.38, 0.6, 6)
Else
' Add the smooth color scale starting at radius 124 with zero width and ending at radius 124
' with 16 pixels inner width
Call m.addColorScale(smoothColorScale, 124, 0, 124, -16)
' Add a red (0xff0000) pointer
Call m.addPointer2(value, &Hff0000)
End If
' Configure a large "pointer cap" to be used as the readout circle at the center. The cap radius
' and border width is set to 33% and 4% of the meter scale radius. The cap color is dark blue
' (0x000044). The border color is light blue (0x66bbff) with a 60% brightness gradient effect.
Call m.setCap2(cd.Transparent, &H000044, &H66bbff, 0.6, 0, 0.33, 0.04)
' Add value label at the center with light blue (0x66ddff) 28pt Arial Italic font
Call m.addText(150, 150, m.formatValue(value, "{value|0}"), "ariali.ttf", 28, &H66ddff, _
cd.Center).setMargin(0)
' Output the chart
Set viewer.Picture = m.makePicture()
End Sub