ChartDirector 6.0 (ASP/COM/VB Edition)

Black Vertical Bar Meters


          

This example demonstrates vertical bar meters in a black coloring scheme, and with bars in various shading styles.

Source Code Listing

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

' This script can draw different charts depending on the chartIndex
chartIndex = CInt(Request("img"))

' The value to display on the meter
value = 66.77

' Create a LinearMeter object of size 70 x 260 pixels with black background and rounded corners
Set m = cd.LinearMeter(70, 260, &H000000)
Call m.setRoundedFrame(cd.Transparent)

' Set the default text and line colors to white (0xffffff)
Call m.setColor(cd.TextColor, &Hffffff)
Call m.setColor(cd.LineColor, &Hffffff)

' Set the scale region top-left corner at (36, 30), with size of 20 x 196 pixels. The scale labels
' are located on the left (default - implies vertical meter).
Call m.setMeter(36, 30, 20, 196)

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

' Add the chart title at the top center
Set title = m.addText(m.getWidth() / 2, 5, "Temp C", "arialbd.ttf", 8, cd.TextColor, cd.TopCenter)

' Move the scale labels 8 pixels from the meter scale to make room for the color scale
Call m.setLabelPos(False, 8)

' Demostrate different types of color scales
smoothColorScale = Array(0, &H0000ff, 25, &H0088ff, 50, &H00ff00, 75, &Hdddd00, 100, &Hff0000)
stepColorScale = Array(0, &H00dd00, 50, &Hffff00, 80, &Hff0000, 100)
highLowColorScale = Array(0, &H0000ff, 40, cd.Transparent, 60, cd.Transparent, 100, &Hff0000)
highColorScale = Array(70, cd.Transparent, 100, &Hff0000)

If chartIndex = 0 Then
    ' Add a blue (0x0088ff) bar from 0 to value with glass effect and 4 pixel rounded corners
    Call m.addBar(0, value, &H0088ff, cd.glassEffect(cd.NormalGlare, cd.Left), 4)
    ' Add a 4-pixel thick smooth color scale at x = 29 (left of meter scale)
    Call m.addColorScale(smoothColorScale, 29, 4)
ElseIf chartIndex = 1 Then
     ' Add a yellow (0xCC9922) bar from 0 to value with bar lighting effect
    Call m.addBar(0, value, &Hcc9922, cd.barLighting())
    ' Add a 4-pixel thick smooth color scale at x = 29 (left of meter scale)
    Call m.addColorScale(smoothColorScale, 29, 4)

    ' Set the title style to black text on a yellow (0xcc9922) background with rounded corners
    Call title.setFontColor(&H000000)
    Call title.setBackground(&Hcc9922)
    Call title.setRoundedCorners(2)
ElseIf chartIndex = 2 Then
     ' Add a grey (0xaaaaaa) bar from 0 to value with bar lighting effect
    Call m.addBar(0, value, &Haaaaaa, cd.barLighting())
    ' Add a 4-pixel high/low color scale at x = 29 (left of meter scale)
    Call m.addColorScale(highLowColorScale, 29, 4)
ElseIf chartIndex = 3 Then
     ' Add a brown (0xbb6622) bar from 0 to value with cylinder lighting effect
    Call m.addBar(0, value, &Hbb6622, cd.cylinderEffect())
    ' Add a 4 pixel thick brown (0xbb6622) frame
    Call m.setThickFrame(4, &Hbb6622)
    ' Add a high only color scale at x = 29 (left of meter scale)
    Call m.addColorScale(highColorScale, 29, 4)
ElseIf chartIndex = 4 Then
    ' Add a purple (0x7755ee) bar from 0 to value
    Call m.addBar(0, value, &H7755ee)
    ' Add a 4 pixel thick purple (0x880088) frame
    Call m.setThickFrame(4, &H880088)
    ' Add a 4-pixel high/low color scale at x = 29 (left of meter scale)
    Call m.addColorScale(highLowColorScale, 29, 4)
Else
     ' Add a green (0x00bb00) bar from 0 to value with soft lighting effect and 4 pixel rounded
     ' corners
    Call m.addBar(0, value, &H00bb00, cd.softLighting(), 4)
    ' Add a 4-pixel step color scale at x = 29 (left of meter scale)
    Call m.addColorScale(stepColorScale, 29, 4)
End If

' Add a text box at the bottom-center. Display the value using white (0xffffff) 8pt Arial Bold font
' on a black (0x000000) background with depressed grey (0x333333) rounded border.
Set t = m.addText(m.getWidth() / 2, m.getHeight() - 7, m.formatValue(value, "2"), "arialbd.ttf", _
    8, &Hffffff, cd.BottomCenter)
Call t.setBackground(&H000000, &H333333, -1)
Call t.setRoundedCorners(3)

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

[Windows Version (in Visual Basic)] vbdemo\blackvbarmeter.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 = 66.77

    ' Create a LinearMeter object of size 70 x 260 pixels with black background and rounded corners
    Dim m As LinearMeter
    Set m = cd.LinearMeter(70, 260, &H000000)
    Call m.setRoundedFrame()

    ' Set the default text and line colors to white (0xffffff)
    Call m.setColor(cd.TextColor, &Hffffff)
    Call m.setColor(cd.LineColor, &Hffffff)

    ' Set the scale region top-left corner at (36, 30), with size of 20 x 196 pixels. The scale
    ' labels are located on the left (default - implies vertical meter).
    Call m.setMeter(36, 30, 20, 196)

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

    ' Add the chart title at the top center
    Dim title As ChartDirector.TextBox
    Set title = m.addText(m.getWidth() / 2, 5, "Temp C", "arialbd.ttf", 8, cd.TextColor, _
        cd.TopCenter)

    ' Move the scale labels 8 pixels from the meter scale to make room for the color scale
    Call m.setLabelPos(False, 8)

    ' Demostrate different types of color scales
    Dim smoothColorScale()
    smoothColorScale = Array(0, &H0000ff, 25, &H0088ff, 50, &H00ff00, 75, &Hdddd00, 100, &Hff0000)
    Dim stepColorScale()
    stepColorScale = Array(0, &H00dd00, 50, &Hffff00, 80, &Hff0000, 100)
    Dim highLowColorScale()
    highLowColorScale = Array(0, &H0000ff, 40, cd.Transparent, 60, cd.Transparent, 100, &Hff0000)
    Dim highColorScale()
    highColorScale = Array(70, cd.Transparent, 100, &Hff0000)

    If chartIndex = 0 Then
        ' Add a blue (0x0088ff) bar from 0 to value with glass effect and 4 pixel rounded corners
        Call m.addBar(0, value, &H0088ff, cd.glassEffect(cd.NormalGlare, cd.Left), 4)
        ' Add a 4-pixel thick smooth color scale at x = 29 (left of meter scale)
        Call m.addColorScale(smoothColorScale, 29, 4)
    ElseIf chartIndex = 1 Then
         ' Add a yellow (0xCC9922) bar from 0 to value with bar lighting effect
        Call m.addBar(0, value, &Hcc9922, cd.barLighting())
        ' Add a 4-pixel thick smooth color scale at x = 29 (left of meter scale)
        Call m.addColorScale(smoothColorScale, 29, 4)

        ' Set the title style to black text on a yellow (0xcc9922) background with rounded corners
        Call title.setFontColor(&H000000)
        Call title.setBackground(&Hcc9922)
        Call title.setRoundedCorners(2)
    ElseIf chartIndex = 2 Then
         ' Add a grey (0xaaaaaa) bar from 0 to value with bar lighting effect
        Call m.addBar(0, value, &Haaaaaa, cd.barLighting())
        ' Add a 4-pixel high/low color scale at x = 29 (left of meter scale)
        Call m.addColorScale(highLowColorScale, 29, 4)
    ElseIf chartIndex = 3 Then
         ' Add a brown (0xbb6622) bar from 0 to value with cylinder lighting effect
        Call m.addBar(0, value, &Hbb6622, cd.cylinderEffect())
        ' Add a 4 pixel thick brown (0xbb6622) frame
        Call m.setThickFrame(4, &Hbb6622)
        ' Add a high only color scale at x = 29 (left of meter scale)
        Call m.addColorScale(highColorScale, 29, 4)
    ElseIf chartIndex = 4 Then
        ' Add a purple (0x7755ee) bar from 0 to value
        Call m.addBar(0, value, &H7755ee)
        ' Add a 4 pixel thick purple (0x880088) frame
        Call m.setThickFrame(4, &H880088)
        ' Add a 4-pixel high/low color scale at x = 29 (left of meter scale)
        Call m.addColorScale(highLowColorScale, 29, 4)
    Else
         ' Add a green (0x00bb00) bar from 0 to value with soft lighting effect and 4 pixel rounded
         ' corners
        Call m.addBar(0, value, &H00bb00, cd.softLighting(), 4)
        ' Add a 4-pixel step color scale at x = 29 (left of meter scale)
        Call m.addColorScale(stepColorScale, 29, 4)
    End If

    ' Add a text box at the bottom-center. Display the value using white (0xffffff) 8pt Arial Bold
    ' font on a black (0x000000) background with depressed grey (0x333333) rounded border.
    Dim t As ChartDirector.TextBox
    Set t = m.addText(m.getWidth() / 2, m.getHeight() - 7, m.formatValue(value, "2"), _
        "arialbd.ttf", 8, &Hffffff, cd.BottomCenter)
    Call t.setBackground(&H000000, &H333333, -1)
    Call t.setRoundedCorners(3)

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

End Sub