ChartDirector 7.0 (ASP/COM/VB Edition)

Rectangular Angular Meters


          

This example demonstrates rectangular angular meters.

The angular span of the meter scale in this example is from -60 to 60 degrees, which is one third of a circle. The meter is configured to have a rectangular frame with rounded corners. A semi-transparent rectangle is put at the bottom of the meter to create the object that covers the meter cap. The rectangle is created by using BaseChart.addText to create an empty text box, and then use Box.setSize and Box.setBackground to configure it to have the proper size and color.

Source Code Listing

[Web Version (in ASP)] aspdemo\rectangularmeter.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 = 72.55 ' Create an AngularMeter object of size 240 x 170 pixels with very light grey (0xeeeeee) ' background, and a rounded 4-pixel thick light grey (0xcccccc) border Set m = cd.AngularMeter(240, 170, &Heeeeee, &Hcccccc) Call m.setRoundedFrame(cd.Transparent) Call m.setThickFrame(4) ' Set the default text and line colors to dark grey (0x222222) Call m.setColor(cd.TextColor, &H222222) Call m.setColor(cd.LineColor, &H222222) ' Center at (120, 145), scale radius = 128 pixels, scale angle -60 to +60 degrees Call m.setMeter(120, 145, 128, -60, 60) ' Meter scale is 0 - 100, with major/minor/micro ticks every 20/10/5 units Call m.setScale(0, 100, 20, 10, 5) ' Set the scale label style to 14pt 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", 14) 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) 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 128 with zero width and ending at radius 128 ' with 16 pixels inner width Call m.addColorScale(smoothColorScale, 128, 0, 128, -16) ElseIf chartIndex = 2 Then ' Add the smooth color scale starting at radius 70 with zero width and ending at radius 60 ' with 20 pixels outer width Call m.addColorScale(smoothColorScale, 70, 0, 60, 20) ElseIf chartIndex = 3 Then ' Add the high/low color scale at the default position Call m.addColorScale(highLowColorScale) ElseIf chartIndex = 4 Then ' Add the step color scale at the default position Call m.addColorScale(stepColorScale) Else ' Add the smooth color scale at radius 60 with 15 pixels outer width Call m.addColorScale(smoothColorScale, 60, 15) End If ' Add a text label centered at (120, 120) with 15pt Arial Italic font Call m.addText(120, 120, "CPU", "Arial Italic", 15, cd.TextColor, cd.BottomCenter) ' Add a red (0xff0000) pointer at the specified value Call m.addPointer2(value, &Hff0000) ' Add a semi-transparent light grey (0x3fcccccc) rectangle at (0, 120) and of size 240 x 60 ' pixels to cover the bottom part of the meter for decoration Set cover = m.addText(0, 120, "") Call cover.setSize(240, 60) Call cover.setBackground(&H3fcccccc) ' 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>Rectangular Angular 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;"> Rectangular Angular 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\rectangularmeter.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 = 72.55 ' Create an AngularMeter object of size 240 x 170 pixels with very light grey (0xeeeeee) ' background, and a rounded 4-pixel thick light grey (0xcccccc) border Dim m As AngularMeter Set m = cd.AngularMeter(240, 170, &Heeeeee, &Hcccccc) Call m.setRoundedFrame() Call m.setThickFrame(4) ' Set the default text and line colors to dark grey (0x222222) Call m.setColor(cd.TextColor, &H222222) Call m.setColor(cd.LineColor, &H222222) ' Center at (120, 145), scale radius = 128 pixels, scale angle -60 to +60 degrees Call m.setMeter(120, 145, 128, -60, 60) ' Meter scale is 0 - 100, with major/minor/micro ticks every 20/10/5 units Call m.setScale(0, 100, 20, 10, 5) ' Set the scale label style to 14pt 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", 14) 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) 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 128 with zero width and ending at radius 128 ' with 16 pixels inner width Call m.addColorScale(smoothColorScale, 128, 0, 128, -16) ElseIf chartIndex = 2 Then ' Add the smooth color scale starting at radius 70 with zero width and ending at radius 60 ' with 20 pixels outer width Call m.addColorScale(smoothColorScale, 70, 0, 60, 20) ElseIf chartIndex = 3 Then ' Add the high/low color scale at the default position Call m.addColorScale(highLowColorScale) ElseIf chartIndex = 4 Then ' Add the step color scale at the default position Call m.addColorScale(stepColorScale) Else ' Add the smooth color scale at radius 60 with 15 pixels outer width Call m.addColorScale(smoothColorScale, 60, 15) End If ' Add a text label centered at (120, 120) with 15pt Arial Italic font Call m.addText(120, 120, "CPU", "ariali.ttf", 15, cd.TextColor, cd.BottomCenter) ' Add a red (0xff0000) pointer at the specified value Call m.addPointer2(value, &Hff0000) ' Add a semi-transparent light grey (0x3fcccccc) rectangle at (0, 120) and of size 240 x 60 ' pixels to cover the bottom part of the meter for decoration Dim cover As ChartDirector.TextBox Set cover = m.addText(0, 120, "") Call cover.setSize(240, 60) Call cover.setBackground(&H3fcccccc) ' Output the chart Set viewer.Picture = m.makePicture() End Sub