Android Question Can't choose First option in B4XComboBox

S

Sifu

Active Member
Hello,

when I fill a B4XCombobox then I can not choose the first option. I first have to choose another option, and after that I can choose the first option.
How do I solve that?
I must be forgetting something, I think. As it looks like something is already chosen, but it is not.

it's filled like:
B4X: 
ListOfAlbums.Initialize
            If job.Success Then
                Dim res As String
                res = job.GetString
                Log("Response from server albums: " & res)
                Dim parser As JSONParser
                parser.Initialize(res)
        Dim items As List
        items.Initialize
        Dim list As List= res.As(JSON).ToList
        For Each colroot As Map In list
            items.Add(colroot.Get("albumname"))
        Next
        B4XComboBox1Albums.SetItems(items)        
            Else
                Log("ERROR: " & job.ErrorMessage)
            End If

Then it's picked like:
B4X: 
Private Sub B4XComboBox1Albums_SelectedIndexChanged (Index As Int)
    Dim albnme As String
    albnme = B4XComboBox1Albums.cmbBox.GetItem(Index)
    Log("albnme= " & albnme)
   '''''do other stuff after selecting choice........
End Sub

Thanks for any help.
 
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Mariano Ismael Castro

Active Member
Licensed User
Hi, I'm not totally sure, but I think the solution is in the B4XComboBox event.
Try commenting out line 145 of the B4XComboBox.bas class found inside the XUI Views library

B4XComboBox: 
Private Sub RaiseEvent
    Dim index As Int = getSelectedIndex
    If LastSelectedIndex = index Then Return
    If DelayBeforeChangeEvent > 0 Then
        DelayIndex = DelayIndex + 1
        Dim MyIndex As Int = DelayIndex
        Sleep(DelayBeforeChangeEvent)
        If MyIndex <> DelayIndex Then Return
    End If
    LastSelectedIndex = index
    If xui.SubExists(mCallBack, mEventName & "_SelectedIndexChanged", 1) Then
        CallSub2(mCallBack, mEventName & "_SelectedIndexChanged", index)
    End If
End Sub
 
Upvote 0

Jeffrey Cameron

Well-Known Member
Licensed User
Longtime User
To force the user to select an item, add
B4X: 
B4XComboBox1Albums.SelectedIndex = -1
after your .SetItems statement.

To actually have the first item selected, add
B4X: 
B4XComboBox1Albums_SelectedIndexChanged(0)
instead.
 
Upvote 0
S

Sifu

Active Member
HI Mariano,
I tried what you suggested.
First I backed up the original XUI Views library.
Then I unzipped the library, then uncommented that line, then zipped it again. and renamed it as XUI Views.b4xlib.

It gives this error:
B4X: 
B4A Version: 11.80
Parsing code.    Error
Error parsing program.
Error description: Unknown type: bitmapcreator
Are you missing a library reference?
Error occurred on line: 57 (AnimatedCounter)
Dim bc As BitmapCreator

I tried it again and zipped it without compression, same error.
 
Last edited:
Upvote 0
S

Sifu

Active Member

Your first option helps. Now the first option in the B4XComboBox is selectable right away.

(your 2nd option is something what I tried before but found it not user friendly enough, because it's always chosen at start and begins loading that data.)

Thanks a lot Jeffrey!
 
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