ChartDirector 6.0 (ASP/COM/VB Edition)

Multi-Pointer Horizontal Meter




This example demonstrates a horizontal linear meter with multiple pointers.

Source Code Listing

[Web Version (in ASP)] aspdemo\multihmeter.asp
<%@ language="vbscript" %>
<%
Set cd = CreateObject("ChartDirector.API")

' The values to display on the meter
value0 = 30.99
value1 = 45.35
value2 = 77.64

' Create an LinearMeter object of size 250 x 75 pixels, using silver background with a 2 pixel black
' 3D depressed border.
Set m = cd.LinearMeter(250, 75, cd.silverColor(), 0, -2)

' Set the scale region top-left corner at (15, 25), with size of 220 x 20 pixels. The scale labels
' are located on the top (implies horizontal meter)
Call m.setMeter(15, 25, 220, 20, cd.Top)

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

' Set 0 - 50 as green (99ff99) zone, 50 - 80 as yellow (ffff66) zone, and 80 - 100 as red (ffcccc)
' zone
Call m.addZone(0, 50, &H99ff99)
Call m.addZone(50, 80, &Hffff66)
Call m.addZone(80, 100, &Hffcccc)

' Add deep red (000080), deep green (008000) and deep blue (800000) pointers to reflect the values
Call m.addPointer(value0, &H000080)
Call m.addPointer(value1, &H008000)
Call m.addPointer(value2, &H800000)

' Add a label at bottom-left (10, 68) using Arial Bold/8pt/red (c00000)
Call m.addText(10, 68, "Temp C", "arialbd.ttf", 8, &Hc00000, cd.BottomLeft)

' Add three text boxes to show the values in this meter
Call m.addText(148, 70, m.formatValue(value0, "2"), "arial.ttf", 8, &H6666ff, cd.BottomRight _
    ).setBackground(0, 0, -1)
Call m.addText(193, 70, m.formatValue(value1, "2"), "arial.ttf", 8, &H33ff33, cd.BottomRight _
    ).setBackground(0, 0, -1)
Call m.addText(238, 70, m.formatValue(value2, "2"), "arial.ttf", 8, &Hff3333, cd.BottomRight _
    ).setBackground(0, 0, -1)

' Output the chart
Response.ContentType = "image/png"
Response.BinaryWrite m.makeChart2(cd.PNG)
Response.End
%>

[Windows Version (in Visual Basic)] vbdemo\multihmeter.cls
Public Sub createChart(viewer As Object, chartIndex As Integer)

    Dim cd As New ChartDirector.API

    ' The values to display on the meter
    Dim value0 As Double
    value0 = 30.99
    Dim value1 As Double
    value1 = 45.35
    Dim value2 As Double
    value2 = 77.64

    ' Create an LinearMeter object of size 250 x 75 pixels, using silver background with a 2 pixel
    ' black 3D depressed border.
    Dim m As LinearMeter
    Set m = cd.LinearMeter(250, 75, cd.silverColor(), 0, -2)

    ' Set the scale region top-left corner at (15, 25), with size of 220 x 20 pixels. The scale
    ' labels are located on the top (implies horizontal meter)
    Call m.setMeter(15, 25, 220, 20, cd.Top)

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

    ' Set 0 - 50 as green (99ff99) zone, 50 - 80 as yellow (ffff66) zone, and 80 - 100 as red
    ' (ffcccc) zone
    Call m.addZone(0, 50, &H99ff99)
    Call m.addZone(50, 80, &Hffff66)
    Call m.addZone(80, 100, &Hffcccc)

    ' Add deep red (000080), deep green (008000) and deep blue (800000) pointers to reflect the
    ' values
    Call m.addPointer(value0, &H000080)
    Call m.addPointer(value1, &H008000)
    Call m.addPointer(value2, &H800000)

    ' Add a label at bottom-left (10, 68) using Arial Bold/8pt/red (c00000)
    Call m.addText(10, 68, "Temp C", "arialbd.ttf", 8, &Hc00000, cd.BottomLeft)

    ' Add three text boxes to show the values in this meter
    Call m.addText(148, 70, m.formatValue(value0, "2"), "arial.ttf", 8, &H6666ff, cd.BottomRight _
        ).setBackground(0, 0, -1)
    Call m.addText(193, 70, m.formatValue(value1, "2"), "arial.ttf", 8, &H33ff33, cd.BottomRight _
        ).setBackground(0, 0, -1)
    Call m.addText(238, 70, m.formatValue(value2, "2"), "arial.ttf", 8, &Hff3333, cd.BottomRight _
        ).setBackground(0, 0, -1)

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

End Sub