Hello Chris
Check out the code below. It provides the functionality you needed. Also
there is test code that you can plop onto a form with a listbox and a button
on it.
--
Ibrahim Malluf
http://www.malluf.com
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ukjock said:
Hi guys and Gals I need some serious help please. I can not get my
head around this problem.
At work we have a BBC Acorn computer (yep, I know what yer thinking),
and for the past month I have decided to re-write the software and
replace the Acorn with a p.c. with new software
The BBC is used for displaying callers to the host of a show. But I am
difficulty figuring out how the company wrote a bit of the software.
http://www.ch010a0005.pwp.blueyonder.co.uk/extreme/bbcacorn.jpg
Down the left is the Line number, to the right is the Callers Details,
and to the right is the order that they called in on.
So it doesn't matter what line they call in on, they will always get
the next available letter. But when you delete the caller the letter
is taken away and then given to the next letter.
So if you delete Line 1. Marc-Coat-Football A
then Donald-Glas-Oneil then loses the B and becomes A,
Dougie-Dundee-Hibs then loses the C and becomes B,
etc. etc.
My GUI looks like this:
[img:9e2f161115]
http://www.ch010a0005.pwp.blueyonder.co.uk/extreme/1.jpg[/im
g:9e2f161115]
Where the Yellow Diamonds are, is where I want to place the letters.
The Diamonds are just labels with an imagebackground.
Any help in figuring out the logic to the letters is much appreciated.
I have been sat for the past 5 hours trying to figure out how to
accomplish this.
Thanks for reading, and hopefully your help.
Chris
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Public Class clsCaller
'================================
'very simple class for holding
'caller information
'================================
Private _Callername As String
Private _CalllerLine As Integer
Private _CallerQue As Char
'constructor requires a name and the line number
Public Sub New(ByVal Name As String, ByVal Line As Integer)
Me._Callername = Name
Me._CalllerLine = Line
End Sub
Public Property CallerName() As String
Get
Return Me._Callername
End Get
Set(ByVal Value As String)
Me._Callername = Value
End Set
End Property
Public Property CallerLine() As Integer
Get
Return Me._CalllerLine
End Get
Set(ByVal Value As Integer)
Me._CalllerLine = Value
End Set
End Property
Public Property CallerQueue() As Char
Get
Return Me._CallerQue
End Get
Set(ByVal Value As Char)
Me._CallerQue = Value
End Set
End Property
End Class
Public Class clsCallers : Implements IEnumerable
Dim _MyCallers As New ArrayList(25)
'adds a caller to the que
Public Function AddCaller(ByVal Name As String, ByVal Line As Integer)
Me._MyCallers.Add(New clsCaller(Name, Line))
End Function
'removes a caller from the que
Public Sub RemoveCaller(ByVal Caller As clsCaller)
Me._MyCallers.Remove(Caller)
End Sub
'gets a caller from the list by index
Public Overloads ReadOnly Property Caller(ByVal Index As Integer) As
clsCaller
Get
Dim MyCaller As clsCaller = DirectCast(Me._MyCallers(Index), clsCaller)
MyCaller.CallerQueue = Chr(65 + Index)
Return MyCaller
End Get
End Property
'gets a caller by queue letter
Public Overloads ReadOnly Property Caller(ByVal Queue As Char) As clsCaller
Get
Queue = Queue.ToUpper(Queue)
If Queue >= "A" Or Queue <= "Z" Then
Return Me._MyCallers(Asc(Queue) - 65)
End If
End Get
End Property
'this makes the Callers class enumerable. So you can get each caller element
in a For-Each structure
Public Function GetEnumerator() As System.Collections.IEnumerator Implements
System.Collections.IEnumerable.GetEnumerator
Return New CallerCollection(Me._MyCallers)
End Function
End Class
'this class provides the enumeration capability for the Callers class
Class CallerCollection : Implements IEnumerator
Private _MyCallers As ArrayList
Private _Index As Integer = -1
Public Sub New(ByVal Callers As ArrayList)
Me._MyCallers = Callers
End Sub
Public ReadOnly Property Current() As Object Implements
System.Collections.IEnumerator.Current
Get
Dim MyCaller As clsCaller = DirectCast(Me._MyCallers(Me._Index), clsCaller)
MyCaller.CallerQueue = Chr(65 + Me._Index)
Return MyCaller
End Get
End Property
Public Function MoveNext() As Boolean Implements
System.Collections.IEnumerator.MoveNext
If Me._Index >= Me._MyCallers.Count - 1 Then Return False
Me._Index += 1
Return True
End Function
Public Sub Reset() Implements System.Collections.IEnumerator.Reset
Me._Index = 0
End Sub
End Class
Drop this code in a form that has a listbox and a command button
Private _Mycallers As clsCallers
Private Sub Form1_Load(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles MyBase.Load
Me._Mycallers = New clsCallers
With Me._Mycallers
.AddCaller("Joe Caller", 1)
.AddCaller("Bill Called", 2)
.AddCaller("Harry Calling", 3)
.AddCaller("Mary Online", 4)
End With
For Each MyCaller As clsCaller In Me._Mycallers
Me.ListBox1.Items.Add(MyCaller.CallerLine & vbTab & MyCaller.CallerQueue &
vbTab & MyCaller.CallerName)
Next
End Sub
Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As
System.EventArgs) Handles Button1.Click
Dim Caller As clsCaller
Caller = Me._Mycallers.Caller(1)
Me._Mycallers.RemoveCaller(Caller)
Me.ListBox1.Items.Clear()
For Each MyCaller As clsCaller In Me._Mycallers
Me.ListBox1.Items.Add(MyCaller.CallerLine & vbTab & MyCaller.CallerQueue &
vbTab & MyCaller.CallerName)
Next
End Sub
