ChartDirector 6.0 (ASP/COM/VB Edition)

Black Horizontal Linear Meters


          

This example demonstrates horizontal bar meters in a black coloring scheme.

Source Code Listing

[Web Version (in ASP)] aspdemo\blackhlinearmeter.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 = 75.35

' Create a LinearMeter object of size 250 x 75 pixels with black background and rounded corners
Set m = cd.LinearMeter(250, 75, &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 (14, 23), with size of 218 x 20 pixels. The scale labels
' are located on the top (implies horizontal meter)
Call m.setMeter(14, 23, 218, 20, cd.Top)

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

' The tick line width to 1 pixel
Call m.setLineWidth(0, 1)

' Demostrate different types of color scales and putting them at different positions
smoothColorScale = Array(0, &H0000ff, 25, &H0088ff, 50, &H00ff00, 75, &Hdddd00, 100, &Hff0000)
stepColorScale = Array(0, &H00cc00, 50, &Heecc00, 80, &Hdd0000, 100)
highLowColorScale = Array(0, &H0000ff, 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 y = 23 (top of scale) with zero width and ending at y =
    ' 23 with 20 pixels width
    Call m.addColorScale(smoothColorScale, 23, 0, 23, 20)
ElseIf chartIndex = 2 Then
    ' Add the high low scale at the default position
    Call m.addColorScale(highLowColorScale)
ElseIf chartIndex = 3 Then
    ' Add the smooth color scale starting at y = 33 (center of scale) with zero width and ending at
    ' y = 23 with 20 pixels width
    Call m.addColorScale(smoothColorScale, 33, 0, 23, 20)
ElseIf chartIndex = 4 Then
    ' Add the step color scale at the default position
    Call m.addColorScale(stepColorScale)
Else
    ' Add the smooth color scale starting at y = 43 (bottom of scale) with zero width and ending at
    ' y = 23 with 20 pixels width
    Call m.addColorScale(smoothColorScale, 43, 0, 23, 20)
End If

' Add a blue (0x0000cc) pointer with white (0xffffff) border at the specified value
Call m.addPointer(value, &H0000cc, &Hffffff)

' Add a label left aligned to (10, 61) using 8pt Arial Bold font
Call m.addText(10, 61, "Temperature C", "arialbd.ttf", 8, cd.TextColor, cd.Left)

' Add a text box right aligned to (235, 61). Display the value using white (0xffffff) 8pt Arial Bold
' font on a black (0x000000) background with depressed grey (0x444444) rounded border.
Set t = m.addText(235, 61, m.formatValue(value, "2"), "arialbd.ttf", 8, &Hffffff, cd.Right)
Call t.setBackground(&H000000, &H444444, -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\blackhlinearmeter.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 = 75.35

    ' Create a LinearMeter object of size 250 x 75 pixels with black background and rounded corners
    Dim m As LinearMeter
    Set m = cd.LinearMeter(250, 75, &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 (14, 23), with size of 218 x 20 pixels. The scale
    ' labels are located on the top (implies horizontal meter)
    Call m.setMeter(14, 23, 218, 20, cd.Top)

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

    ' The tick line width to 1 pixel
    Call m.setLineWidth(0, 1)

    ' Demostrate different types of color scales and putting them at different positions
    Dim smoothColorScale()
    smoothColorScale = Array(0, &H0000ff, 25, &H0088ff, 50, &H00ff00, 75, &Hdddd00, 100, &Hff0000)
    Dim stepColorScale()
    stepColorScale = Array(0, &H00cc00, 50, &Heecc00, 80, &Hdd0000, 100)
    Dim highLowColorScale()
    highLowColorScale = Array(0, &H0000ff, 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 y = 23 (top of scale) with zero width and ending at
        ' y = 23 with 20 pixels width
        Call m.addColorScale(smoothColorScale, 23, 0, 23, 20)
    ElseIf chartIndex = 2 Then
        ' Add the high low scale at the default position
        Call m.addColorScale(highLowColorScale)
    ElseIf chartIndex = 3 Then
        ' Add the smooth color scale starting at y = 33 (center of scale) with zero width and ending
        ' at y = 23 with 20 pixels width
        Call m.addColorScale(smoothColorScale, 33, 0, 23, 20)
    ElseIf chartIndex = 4 Then
        ' Add the step color scale at the default position
        Call m.addColorScale(stepColorScale)
    Else
        ' Add the smooth color scale starting at y = 43 (bottom of scale) with zero width and ending
        ' at y = 23 with 20 pixels width
        Call m.addColorScale(smoothColorScale, 43, 0, 23, 20)
    End If

    ' Add a blue (0x0000cc) pointer with white (0xffffff) border at the specified value
    Call m.addPointer(value, &H0000cc, &Hffffff)

    ' Add a label left aligned to (10, 61) using 8pt Arial Bold font
    Call m.addText(10, 61, "Temperature C", "arialbd.ttf", 8, cd.TextColor, cd.Left)

    ' Add a text box right aligned to (235, 61). Display the value using white (0xffffff) 8pt Arial
    ' Bold font on a black (0x000000) background with depressed grey (0x444444) rounded border.
    Dim t As ChartDirector.TextBox
    Set t = m.addText(235, 61, m.formatValue(value, "2"), "arialbd.ttf", 8, &Hffffff, cd.Right)
    Call t.setBackground(&H000000, &H444444, -1)
    Call t.setRoundedCorners(3)

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

End Sub