关于生成目录树结构的类(2)

For Each ChildNode In mcolChildren.Items
ChildNode.Draw()
Next

Response.Write "</td>" & vbCrLf
Response.Write "</tr>" & vbCrLf
End If
End If

Response.Write "</table>" & vbCrLf

End Sub

End Class

Class Tree

Public Top
Public Left
Public ExpandImage
Public CollapseImage
Public LeafImage
Private mszPosition
Private mcolChildren

Public Property Let Absolute(bData)
If bData Then mszPosition = "absolute" Else mszPosition = "relative"
End Property

Public Property Get Absolute()
Absolute = CBool(mszPosition = "absolute")
End Property

Private Sub Class_Initialize()
Set mcolChildren = Server.CreateObject("Scripting.Dictionary")
mnTop = 0
mnLeft = 0
mszPosition = "absolute"
End Sub

Private Sub Class_Terminate()
mcolChildren.RemoveAll()
Set mcolChildren = Nothing
End Sub

Public Function CreateChild(szValue)

Set CreateChild = New TreeNode

CreateChild.Value = szValue
CreateChild.ExpandImage = ExpandImage
CreateChild.CollapseImage = CollapseImage
CreateChild.LeafImage = LeafImage

mcolChildren.Add mcolChildren.Count 1, CreateChild

End Function

Public Sub LoadTemplate(szFileName)
Dim objWorkingNode
Dim colNodeStack
Dim fsObj, tsObj
Dim szLine
Dim nCurrDepth, nNextDepth

Set colNodeStack = Server.CreateObject("Scripting.Dictionary")
Set fsObj = CreateObject("Scripting.FileSystemObject")
Set tsObj = fsObj.OpenTextFile(szFileName, 1)

nCurrDepth = 0
While Not tsObj.AtEndOfLine
nNextDepth = 1
szLine = tsObj.ReadLine()

If nCurrDepth = 0 Then
Set objWorkingNode = CreateChild(Trim(szLine))
nCurrDepth = 1
Else
While Mid(szLine,nNextDepth,1) = vbTab Or Mid(szLine,nNextDepth,1) = " "
nNextDepth = nNextDepth 1
WEnd

If nNextDepth > 1 Then szLine = Trim(Mid(szLine,nNextDepth))

If szLine <> "" Then
If nNextDepth > nCurrDepth Then
If colNodeStack.Exists(nCurrDepth) Then
Set colNodeStack.Item(nCurrDepth) = objWorkingNode
Else
colNodeStack.Add nCurrDepth, objWorkingNode
End If

Set objWorkingNode = objWorkingNode.CreateChild(szLine)

nCurrDepth = nCurrDepth 1
ElseIf nNextDepth <= nCurrDepth Then

If nNextDepth > 1 Then

nNextDepth = nNextDepth - 1
While Not colNodeStack.Exists(nNextDepth) And nNextDepth > 1
nNextDepth = nNextDepth - 1
WEnd

Set objWorkingNode = colNodeStack.Item(nNextDepth)
Set objWorkingNode = objWorkingNode.CreateChild(szLine)

nNextDepth = nNextDepth 1
Else
Set objWorkingNode = CreateChild(szLine)
End If

nCurrDepth = nNextDepth
End If
End If

End If
WEnd

tsObj.Close()
Set tsObj = Nothing
Set fsObj = Nothing

colNodeStack.RemoveAll()
Set colNodeStack = Nothing

End Sub


Public Sub Draw()

AddClientScript()

Response.Write "<div id=""treectrl"" style=""left: " & Left & "px; top: " & Top & "px; position: " & mszPosition & ";"">" & vbCrLf
Response.Write "<form name=""treectrlfrm"" action=""" & Request.ServerVariables("SCRIPT_NAME") & """ method=""get"">" & vbCrLf
Response.Write "<table border=""0"">" & vbCrLf
Response.Write "<tr><td>" & vbCrLf

For Each ChildNode In mcolChildren.Items
ChildNode.Draw()
Next

Response.Write "</td></tr>" & vbCrLf
Response.Write "</table>" & vbCrLf

Response.Write "<input type=""hidden"" name=""togglenode"" value="""">" & vbCrLf
Response.Write "</form>" & vbCrLf
Response.Write "</div>" & vbCrLf

End Sub

Private Sub AddClientScript()
%>
<script language="JavaScript">

function expandNode(szNodeName)
{
if(document.layers != null) {
document.treectrl.document.treectrlfrm.togglenode.value = szNodeName;
document.treectrl.document.treectrlfrm.submit();
}
else {
document.all["treectrlfrm"].togglenode.value = szNodeName;
document.all["treectrlfrm"].submit();
}
}

function collapseNode(szNodeName)
{
if(document.layers != null) {
document.treectrl.document.treectrlfrm.elements[szNodeName].value = -1;
document.treectrl.document.treectrlfrm.submit();
}
else {
document.treectrlfrm.elements[szNodeName].value = -1;
document.treectrlfrm.submit();
}
}

</script>

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