I have a UserForm with a MultipageControl (name Controller_MultiPage). At runtime my code adds pages to the Multipage and creates a newListView on each page. Every ListView has:
With newListView
.MultiSelect = False
.Width = Controller_MultiPage.Width - 10
.Height = Controller_MultiPage.Height - 20
.View = lvwReport
.HideColumnHeaders = False
.ColumnHeaders.Add Text:="Signal Name", Width:=.Width / 10 * 4
.ColumnHeaders.Add Text:="Type", Width:=.Width / 10
.ColumnHeaders.Add Text:="I/O", Width:=.Width / 10
.ColumnHeaders.Add Text:="Description", Width:=.Width / 10 * 4
.CheckBoxes = True
.FullRowSelect = True
End With
then I populate the newListView with data from an XML file:
For Each node In list
With node.Attributes
Set listItem = newListView.ListItems.Add(Text:=.getNamedItem("Name").Text)
listItem.ListSubItems.Add = .getNamedItem("Type").Text
listItem.ListSubItems.Add = IIf(.getNamedItem("Input").Text = "1", "IN", "OUT")
listItem.ListSubItems.Add = .getNamedItem("Description").Text
listItem.Checked = False
End With
Next
but the checkboxes do not show. I can see the space for them in front of the first column and by clicking that space the checkbox of that particular row then appears. What I also noticed is that if I change the property
listItem.Checked = True
the behavior described above does not change, and when I click the free space in front of the first column (checkboxes space) the chsckbox that then shows up is still unchecked. Any idea?
The problem seems to be in the behavior of the MultiPage control. What I noticed was that if I forced the checkboxes' status (checked or unchecked) from the code, using the MultiPage_Change
event, then the checkboxes show up.
So what I did was to create a class that holds the status of all checkboxes of all listviews on a single page, instantiate the Class for each ListView
and store everything into a Dictionary, using the newListView.Name
as Key
Then when the user changes page, the MultiPage_Change event that fires resets all the values of the checkboxes according to the Dictionary stored values.
In the Listview_N_ItemChecked event some other code updates the status of the item stored in the Dictionary. Kind of cumbersome but it works.
the class ( updated ):
' Class Name = ComponentsSignalsRecord
Option Explicit
Dim Name As String
' NOTE: Signals(0) will always be empty and status(0) will always be False
Dim Signals() As String
Dim Status() As Boolean
Dim Component As String
Property Let SetComponentName(argName As String)
Component = argName
End Property
Property Get GetComponentName() As String
GetComponentName = Component
End Property
Property Get getSignalName(argIndex) As String
If argIndex >= LBound(Signals) And argIndex <= UBound(Signals) Then
getSignalName = Signals(argIndex)
Else
getSignalName = vbNullString
End If
End Property
Property Get dumpAll() As String()
dumpAll = Signals
End Property
Property Get Count() As Long
Count = UBound(Signals)
End Property
Property Get getStatus(argName As String) As Integer
' returns: -1 = Not Found; 1 = True; 0 = False
getStatus = -1
Dim i As Integer
For i = 0 To UBound(Signals)
If argName = Signals(i) Then getStatus = IIf(Status(i) = True, 1, 0): Exit For
Next
End Property
Property Let setName(argName As String)
Name = argName
End Property
Property Get getName() As String
getName = Name
End Property
Public Sub UncheckAll()
Dim i As Integer
For i = 0 To UBound(Status)
Status(i) = False
Next
End Sub
Public Sub CheckAll()
Dim i As Integer
For i = 0 To UBound(Status)
Status(i) = True
Next
End Sub
Public Sub deleteSignal(argName As String)
Dim spoolSignals() As String
Dim spoolStatus() As Boolean
Dim i As Integer
spoolSignals = Signals
spoolStatus = Status
ReDim Signals(0)
ReDim Status(0)
For i = 1 To UBound(spoolSignals)
If argName <> spoolSignals(i) Then
ReDim Preserve Signals(UBound(Signals) + 1): Signals(UBound(Signals)) = spoolSignals(i)
ReDim Preserve Status(UBound(Status) + 1): Status(UBound(Status)) = spoolStatus(i)
End If
Next
End Sub
Public Sub addSignal(argName As String, argValue As Boolean)
Dim i As Integer
For i = 0 To UBound(Signals)
If argName = Signals(i) Then GoTo bye
Next
ReDim Preserve Signals(UBound(Signals) + 1)
ReDim Preserve Status(UBound(Status) + 1)
Signals(UBound(Signals)) = argName
Status(UBound(Status)) = argValue
bye:
End Sub
Public Sub setStatus(argName As String, argValue As Boolean)
Dim i As Integer
For i = 0 To UBound(Signals)
If argName = Signals(i) Then Status(i) = argValue: Exit For
Next
End Sub
Private Sub Class_Initialize()
ReDim Signals(0)
ReDim Status(0)
End Sub
The Form relevant code. Module level:
Dim myDict As New Dictionary ' the Dictionary
Dim ComponentsSignalsList As ComponentsSignalsRecord ' the Class
for each ListView created, may be one or more for every single MultiPage page:
Set ComponentsSignalsList = New ComponentsSignalsRecord
ComponentsSignalsList.setName = newListView.name
while populating the listview(s) in a loop for each single item added:
ComponentsSignalsList.addSignal List_Item.Text, List_Item.Checked
end of each loop, add the Class instance to the Dictionary:
myDict.Add ComponentsSignalsList.getName, ComponentsSignalsList
Now when changing Page in the MultiPage widget:
Private Sub Controller_MultiPage_Change()
If isLoading Then Exit Sub 'avoid errors and undue behavior while initializing the MultiPage widget
Dim locControl As Control
Dim controlType As String: controlType = "ListView"
With Controller_MultiPage
For Each locControl In .Pages(.value).Controls
If InStr(1, TypeName(locControl), controlType) > 0 Then
Call Check_CheckBoxes(locControl)
End If
Next
End With
End Sub
Private Sub Check_CheckBoxes(argListView As listView)
If argListView.CheckBoxes = False Then Exit Sub 'some ListViews don't have checkboxes
Dim myItem As ListItem
For Each myItem In argListView.ListItems
With myItem
.Checked = myDict.Item(argListView.name).getStatus(.Text)
End With
Next
End Sub
when ticking/unticking a checkbox (note the the ItemChecked event handler is defined in another Class Public WithEvents
, where the handler calls this method passing both the ListView ID and the Item object):
Public Sub ListViewsEvents_ItemCheck(argListView As listView, argItem As MSComctlLib.ListItem)
With argItem
myDict.Item((argListView .name).setStatus argName:=.Text, argValue:=.Checked
End With
End Sub
I just found the answer to the same problem that I also had and I feel so stupid. I had the first column of the Listview set to Width = 0... and thus the checkboxes would no longer show. I gave it a width and everithing is back to normal...
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