B4J Question Can not get abmCombobox items to show on container.

Rob White

Member
Licensed User
Hi all,

Here's my latest problem. I have an abmList onto which I am placing containers which contain both a label and a combo box. See my code below.
This is a test page where data is coming from two global lists.
Please have a look at the fillList sub. The combo's seem to work BUT they do not show content. I note that no click events are being generated just got and lost focus events.

B4X:
'How To create a new page:-
'
'1] Use Project | Add new model | Class | ABM web page To create page class.
'    Call this File the same Name As your page Name.
'2] Set Public Name As String = "yourPageName" (top of class File around line 20)
'3] In Main class File add a page :-
'        Dim pregTestPage As pregTest  <<<< This is name of class file        (around line 50)
'        pregTestPage.Initialize
'       
'        Add page To site     myApp.AddPage(pregTestPage.page)    ' <<<<< Add to app (site)

'4] Change these (abt line 130) :-
'            page.PageTitle = "Template"
'            page.PageDescription = "Template"
'
'5] In BuildPage Sub :- Build a grid eg     
'    '
'    page.AddRowsM(2,True,20,0, "").AddCells12MP(1,0,0,0,0,"")   
'
'6] Connect controls eg
'        Dim lblTitle As ABMLabel
'        lblTitle.Initialize(page, "lblobservtitle", ABMShared.TitleStr("Observation"), ABM.SIZE_H3, False, "lbltheme1")
'        lblTitle.SetTooltip("Eunony farming",ABM.POSITION_BOTTOMRIGHT,100)
'

'Class module
Sub Class_Globals
    Private ws As WebSocket 'ignore
    ' will hold our page information
    Public page As ABMPage
    ' page theme
    Private theme As ABMTheme
    ' to access the constants
    Private ABM As ABMaterial 'ignore   
    ' name of the page, must be the same as the class name (case sensitive!)
    Public Name As String = "Testing"                                              ' <<<<<<- IMPORTANT
    ' will hold the unique browsers window id
    Private ABMPageId As String = ""
    ' your own variables   
    
    Dim calves As List
    Dim mothers As List
End Sub

'Initializes the object. You can add parameters to this method if needed.
Public Sub Initialize
    mothers.Initialize
    calves.Initialize
    Dim M1 As beast
    M1.Initialize
    M1.NLIS = 111111
    M1.EarTag = "111"
    M1.OffspringDOB = 123456
    M1.Sex= "C"
    Dim M2 As beast
    M2.Initialize
    M2.NLIS = 222222
    M2.EarTag = "222"
    M2.OffspringDOB = 123456
    M2.Sex= "C"
    Dim M3 As beast
    M3.Initialize
    M3.NLIS = 333333
    M3.EarTag = "333"
    M3.OffspringDOB = 123456
    M3.Sex= "C"
    Dim M4 As beast
    M4.Initialize
    M4.NLIS = 444444
    M4.EarTag = "444"
    M4.OffspringDOB = 123456
    M4.Sex= "C"
    Dim C1 As beast
    C1.Initialize
    C1.NLIS = 555555
    C1.EarTag = "S55"
    C1.OffspringDOB = 123456
    C1.Sex= "H"
    Dim C2 As beast
    C2.Initialize
    C2.NLIS = 666666
    C2.EarTag ="S66"
    C2.OffspringDOB = 123456
    C2.Sex= "H"
    Dim C3 As beast
    C3.Initialize
    C3.NLIS = 777777
    C3.EarTag = "S77"
    C3.OffspringDOB = 123456
    C3.Sex= "S"
    Dim C4 As beast
    C4.Initialize
    C4.NLIS = 888888
    C4.EarTag = "S88"
    C4.OffspringDOB = 123456
    C4.Sex= "S"

    mothers.Add(M1)
    mothers.Add(M2)
    mothers.Add(M3)
    mothers.Add(M4)

    calves.Add(M1)
    calves.Add(M2)
    calves.Add(M3)
    calves.Add(M4)


    ' build the local structure IMPORTANT!
    BuildPage       
End Sub

#Region ABM
Private Sub WebSocket_Connected (WebSocket1 As WebSocket)   
    Log("Connected")
        
    ws = WebSocket1       
    
    ABMPageId = ABM.GetPageID(page, Name,ws)
    
    Dim session As HttpSession = ABM.GetSession(ws, ABMShared.SessionMaxInactiveIntervalSeconds)
    If session.IsNew Then
        session.Invalidate
        ABMShared.NavigateToPage(ws, "", "./")
        Return
    End If
        
    If ABMShared.NeedsAuthorization Then
        If session.GetAttribute2("IsAuthorized", "") = "" Then
            ABMShared.NavigateToPage(ws, ABMPageId, "../")
            Return
        End If
    End If       
    ABM.UpdateFromCache(Me, ABMShared.CachedPages, ABMPageId, ws)       
    If page.ComesFromPageCache Then
        ' when we have a page that is cached it doesn't matter if it comes or not from a new connection we serve the cached version.
        Log("Comes from cache")       
        page.Refresh       
        page.FinishedLoading       
    Else
        If page.WebsocketReconnected Then
            Log("Websocket reconnected")
            ' when we have a client that doesn't have the page in cache and it's websocket reconnected and also it's session is new - basically when the client had internet problems and it's session (and also cache) expired before he reconnected so the user has content in the browser but we don't have any on the server. So we need to reload the page.
            ' when a client that doesn't have the page in cache and it's websocket reconnected but it's session is not new - when the client had internet problems and when he reconnected it's session was valid but he had no cache for this page we need to reload the page as the user browser has content, reconnected but we have no content in cache
            ABMShared.NavigateToPage (ws, ABMPageId, "./" & page.PageHTMLName)
        Else
            ' when the client did not reconnected it doesn't matter if the session was new or not because this is the websockets first connection so no dynamic content in the browser ... we are going to serve the dynamic content...
            Log("Websocket first connection")
            page.Prepare
            ConnectPage           
        End If
    End If
    Log(ABMPageId)       
End Sub

Private Sub WebSocket_Disconnected
    Log("Disconnected")
End Sub

Sub Page_ParseEvent(Params As Map)
    Dim eventName As String = Params.Get("eventname")
    Dim eventParams() As String = Regex.Split(",",Params.Get("eventparams"))
    
    Log($".........................>> ${eventName} raised"$)
    
    If eventName = "beforeunload" Then
        Log("preparing for url refresh")
        ABM.RemoveMeFromCache(ABMShared.CachedPages, ABMPageId)
        Return
    End If
    Dim caller As Object = page.GetEventHandler(Me, eventName)
    If caller = Me Then
        If SubExists(Me, eventName) Then
            Params.Remove("eventname")
            Params.Remove("eventparams")
            If eventName = "page_dropped" Then
                page.ProcessDroppedEvent(Params)
            End If
            Select Case Params.Size
                Case 0
                    Log($".........................>> ${eventName} has 0 args"$)
                    CallSub(Me, eventName)
                Case 1
                    Log($".........................>> ${eventName} has 1 arg ${Params.Get(eventParams(0))}"$)
                    CallSub2(Me, eventName, Params.Get(eventParams(0)))
                Case 2
                    If Params.get(eventParams(0)) = "abmistable" Then
                        Log($".........................>> 'abmistable' ${Params.Get(eventParams(0))}"$)
                        Dim PassedTables As List = ABM.ProcessTablesFromTargetName(Params.get(eventParams(1)))
                        CallSub2(Me, eventName, PassedTables)
                    Else
                        Log($".........................>> ${eventName} callSub3 ${Params.Get(eventParams(0))} , ${Params.Get(eventParams(1))}"$)
                        CallSub3(Me, eventName, Params.Get(eventParams(0)), Params.Get(eventParams(1)))
                    End If
                Case Else
                    ' cannot be called directly, to many param
                    Log(".........................>> cannot be called directly, to many param")
                    CallSub2(Me, eventName, Params)
            End Select
        End If
    Else
        Log(".........................>> Caller NOT me")
        CallSubDelayed2(caller, "ParseEvent", Params) 'ignore
    End If
End Sub

public Sub BuildTheme()
    ' start with the base theme defined in ABMShared
    theme.Initialize("pagetheme")
    theme.AddABMTheme(ABMShared.MyTheme)

    ' add your specific page themes
    
End Sub

public Sub BuildPage()
    ' initialize the theme
    BuildTheme
    
    ' initialize this page using our theme
    page.InitializeWithTheme(Name, "/ws/" & ABMShared.AppName & "/" & Name, False, ABMShared.SessionMaxInactiveIntervalSeconds, theme)
    page.ShowLoader=True
    page.PageHTMLName = "index.html"
    page.PageTitle = "Testing"
    page.PageDescription = "Tests only"
    page.PageKeywords = ""
    page.PageSiteMapPriority = ""
    page.PageSiteMapFrequency = ABM.SITEMAP_FREQ_YEARLY
        
    page.ShowConnectedIndicator = True
                
    ' adding a navigation bar
    ' ABMShared.BuildNavigationBar(page, "My Page","../images/logo.png", "", "", "")   
            
    ' create the page grid - 2 rows with one cell in each.
    page.AddRowsM(2,True,20,0, "").AddCells12MP(1,0,0,0,0,"")   
    
    page.BuildGrid 'IMPORTANT once you loaded the complete grid AND before you start adding components       
End Sub

public Sub ConnectPage()           
    '    connecting the navigation bar
    ' ABMShared.ConnectNavigationBar(page)
    
    Dim LST As ABMList
    LST.Initialize(page,"lst",ABM.COLLAPSE_ACCORDION,"")

    page.Cell(1,1).AddComponent(LST)
    'page.Cell(2,1).AddComponent(btn)
    
    ' refresh the page
    page.Refresh
    
    ' Tell the browser we finished loading
    page.FinishedLoading
    
    fillList

    ' restoring the navigation bar position
    page.RestoreNavigationBarPosition   
End Sub
#end region

Sub fillList
    Dim L As ABMList = page.Component("lst")
    For i = 0 To calves.Size-1
        Dim C As beast = calves.Get(i)
        Dim con As ABMContainer
        con.Initialize(page,"con"&i,"")
        Dim lblCalf As ABMLabel
        lblCalf.Initialize(page,"lblcalf",C.EarTag,ABM.SIZE_H5,False,"")
        con.AddRows(1,True,"").AddCellsOS(1,0,0,0,5,5,5,"").AddCellsOS(1,2,2,2,5,5,5,"")
        con.BuildGrid
        Dim cmbMths As ABMCombo
        cmbMths.Initialize(page,"cmbmths"&i,"Mother",400,"")
        For j = 0 To mothers.Size-1
            Dim M As beast = mothers.Get(j)
            Dim lbl As ABMLabel
            lbl.Initialize(page,"lbl"&j,M.EarTag,ABM.SIZE_H5,False,"")
            cmbMths.AddItem("C"&j,"",lbl)
            cmbMths.SetActiveItemId("C"&j)
        Next
        cmbMths.Refresh
        con.Cell(1,1).AddComponent(lblCalf)
        con.Cell(1,2).AddComponent(cmbMths)
        L.AddItem("con"&i,con)
    Next
    L.refresh

End Sub

#Region ABMPage


' clicked on the navigation bar
Sub Page_NavigationbarClicked(Action As String, Value As String)
    ' saving the navigation bar position
    page.SaveNavigationBarPosition
    If Action = "LogOff" Then
        ABMShared.LogOff(page)
        Return
    End If

    ABMShared.NavigateToPage(ws, ABMPageId, Value)
End Sub

Sub Page_DebugConsole(message As String)
    Log("---> " & message)
End Sub
#end region
 
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