<%
' ###################################################
' ## BarChart #
' ## Class to draw bar charts in ASP applications #
' ## Author : Anton Bawab #
' ## First written : March 27th 2000 #
' ###################################################
' ###################################################
' ## Include this file in your ASP script #
' ## assign the properties #
' ## then use the Draw method #
' ###################################################
Class BarChart
Private mchartBGcolor
Private mchartTitle
Private mchartWidth
Private mchartValueArray
Private mchartLabelsArray
Private mchartColorArray
Private mchartViewDataType
Private mchartBarHeight
Private mchartBorder
Private mchartTextColor
Private mchartCounter ' general counter
Private mchartMaxValue
Private mchartFactor
Private mchartTotalValues
Private mchartMinValue
Public Property LET chartBGcolor(strColor)
mchartBGcolor = strColor
'code validation
IF LEN(mchartBGcolor) <> 7 THEN
ERR.Number = vbObjectError + 1000
ERR.Description = "Color string provided unequal to 7 characters"
Response.Write Err.Number & vbCRLF & ERR.Description
ERR.Clear
EXIT Property
END IF
END Property
Public Property LET chartTitle(strTitle)
mchartTitle = strTitle
END Property
Public Property LET chartWidth(intWidth)
mchartWidth = intWidth
END Property
Public Property LET chartValueArray(arrValues)
mchartValueArray = arrValues
IF NOT isArray(mchartValueArray) THEN
ERR.Number = vbObjectError + 1001
ERR.Description = "Values passed are not an array"
Response.Write Err.Number & vbCRLF & ERR.Description
EXIT Property
ERR.Clear
ERR.Number = vbObjectError + 1002
ERR.Description "Number of values passed does not match labels"
Response.Write Err.Number & vbCRLF & ERR.Description
ERR.Clear
EXIT Property
END IF
END Property
Public Property LET chartLabelsArray(arrLabels)
mchartLabelsArray = arrLabels
IF NOT isArray(mchartLabelsArray) THEN
ERR.Number = vbObjectError + 1001
ERR.Description = "Label values passed are not an array"
Response.Write Err.Number & vbCRLF & ERR.Description
EXIT Property
ERR.Clear
ELSEIF UBOUND(mchartValueArray) <> UBOUND(mchartLabelsArray) THEN
ERR.Number = vbObjectError + 1002
ERR.Description = "Number of values passed does not match labels"
Response.Write Err.Number & vbCRLF & ERR.Description
ERR.Clear
EXIT Property
END IF
END Property
Public Property LET chartColorArray(arrColors)
Dim tempNumOfColors, I
mchartColorArray = arrColors
IF NOT isArray(mchartColorArray) THEN
ERR.Number = vbObjectError + 1001
ERR.Description = "Color values passed are not an array"
Response.Write Err.Number & vbCRLF & ERR.Description
EXIT Property
ERR.Clear
END IF
' match the number of the colors to the number of elements to draw
IF UBOUND(mchartColorArray) < UBOUND(mchartValueArray) THEN
tempNumOfColors = UBOUND(mchartColorArray) 'Get the number of colors provided
REDIM PRESERVE mchartColorArray(UBOUND(mchartValueArray))
' Cycling the values through the array
For I = tempNumOfColors+1 to UBOUND(mchartColorArray)
mchartColorArray(I) = mchartColorArray((I mod (tempNumOfColors+1)))
NEXT
END IF
END Property
Public Property LET chartViewDataType(strProp)
mchartViewDataType = UCASE(strProp)
IF (mchartViewDataType <> "N") AND (mchartViewDataType <> "P") AND (mchartViewDataType <> "V")
THEN
mchartViewDataType = "V"
END IF
END Property
Public Property LET chartBarHeight(intBarHeight)
mchartBarHeight = intBarHeight
IF NOT ISNumeric(mchartBarHeight) THEN
ERR.Number = vbObjectError + 1003
ERR.Description "chartBarHeight property can only accept numerical values"
Response.Write Err.Number & vbCRLF & ERR.Description
EXIT Property
ERR.Clear
END IF
END Property
Public Property LET chartBorder(intBorder)
mchartBorder = intBorder
IF NOT ISNumeric(mchartBorder) THEN
ERR.Number = vbObjectError + 1003
ERR.Description "chartBorder property can only accept numerical values"
Response.Write Err.Number & vbCRLF & ERR.Description
EXIT Property
ERR.Clear
END IF
END Property
Public Property LET chartTextColor(strColor)
mchartTextColor = strColor
IF LEN(mchartTextColor) <> 7 THEN
ERR.Number = vbObjectError + 1000
ERR.Description = "Color string provided less than 7 characters"
Response.Write Err.Number & vbCRLF & ERR.Description
ERR.Clear
EXIT Property
END IF
END Property
Private Property LET chartMaxValue(intValue)
mchartMaxValue = intValue
END Property
Private Property LET chartMinValue(intValue)
mchartMinValue = intValue
END Property
Private Property LET chartTotalValues(intValue)
mchartTotalValues = intValue
END Property
Public Property GET chartMaxValue
chartMaxValue = mchartMaxValue
END Property
Public Property GET chartMinValue
chartMinValue = mchartMinValue
END Property
Public Property GET chartTotalValues
chartTotalValues = mchartTotalValues
END Property
Private Function MakeChart()
Dim F
' getting the hieghest and lowest values within the array
' and calculating the total of the values
mchartMinValue = 0
mchartMaxValue = 0
mchartTotalValues = 0
For each F in mchartValueArray
IF F > mchartMaxValue THEN
mchartMaxValue = F
END IF
IF mchartMinValue = 0 THEN
mchartMinValue = F
ELSEIF F < mchartMinValue THEN
mchartMinValue = F
' Response.Write mchartMinValue
END IF
mchartTotalValues = mchartTotalValues + F
' getting the total of the values in the array
NEXT
chartMaxValue = mchartMaxValue
chartMinValue = mchartMinValue
chartTotalValues = mchartTotalValues
' Determining the factor to use for resizing the values to fit
' within the given width
IF mchartMaxValue > (mchartWidth-20) THEN
' getting the factor
mchartFactor = mchartMaxValue / (mchartWidth-20)
Response.Write("Factor of : " & mchartFactor & "
")
' changing the values of all the entries within the array
For mchartCounter = 0 to UBOUND(mchartValueArray)
mchartValueArray(mchartCounter) = CINT(mchartValueArray(mchartCounter) / mchartFactor)
NEXT
END IF
' Modifying the chartLabelsArray to reflect the setting required
SELECT CASE mchartViewDataType
Case "V" ' display the value
For mchartCounter = 0 to UBOUND(mchartValueArray)
mchartLabelsArray(mchartCounter) = mchartLabelsArray(mchartCounter) & "-" &
mchartValueArray(mchartCounter)
NEXT
Case "P" ' display the percentage
For mchartCounter = 0 to UBOUND(mchartValueArray)
mchartLabelsArray(mchartCounter) = mchartLabelsArray(mchartCounter) & "-" &
((mchartValueArray(mchartCounter) / mchartTotalValues) * 100) & "%"
NEXT
END SELECT
MakeChart = "
| "
MakeChart = MakeChart & "
MakeChart = MakeChart & " |
MakeChart = MakeChart & vbCRLF & ""
END Function
Public SUB Draw()
CheckProps()
Response.Write MakeChart()
END SUB
Private Function CheckProps()
IF ISEMPTY(mchartBGcolor) THEN chartBGcolor = "#FFFFFF"
IF ISEMPTY(mchartColorArray) THEN chartColorArray = Array
("#990000" , "#009900" , "#000099")
IF ISEMPTY(mchartTitle) THEN chartTitle = "Chart Title"
IF ISEMPTY(mchartViewDataType) THEN chartViewDataType = "V"
IF ISEMPTY(mchartBarHeight) Then mchartBarHeight = 15
IF ISEMPTY(mchartBorder) THEN mchartBorder = 0
IF ISEMPTY(mchartTextColor) THEN mchartTextColor = "#000000"
END FUNCTION
END CLASS
%>