Android Question Standard Page Viewer feature or error?

[nibbo]

Hi All

I am using the standard page viewer to display 'pages' from a catalogue.
Each page can contain up to 6 items and the user is able to swipe the pages left or right.
All good except that when sliding the pages I can see the current page behind the page I am swiping to.
Not a problem if the page is full but when I get to the last page only new entries slide across and I can see the items added to the previous page.
I have not explained this very well so will try to illustrate:

If I have 9 items to be viewed page 1 shows:

1 2 3
4 5 6

All good... however if I then swipe the screen left to move to the next page I see:

7 8 9
4 5 6

Why can I still see 4,5 & 6 when these were panels added to page 1 only?

Thanks in advance for any suggestions...

 

[Erel]

Something is wrong in the code that you are using to build (or manage) the layout. Hard to say without seeing some of the code.

 

[nibbo]

Hi Erel

I am sure you a right but I cannot see where the problem is.

Here is a simplified loop that has been used to populate the viewer panels.
As you can see from the attachments the problem seems to be that page 1 is always in the back ground!

Sub ShowStockItems

    '    initialise a standard page viewer and add it to the main panel
    svpStock.Initialize("svpStock",3,pnlStock.Width,pnlStock.Height-100)
    pnlStock.AddView(svpStock.AsView,0,0,100%x,100%y)
   
    '    set in index to the first page
    Dim iPanel As Int = 0
   
    '    create a panel array to contain details of each stock code
    Dim P(15) As Panel
   
           
    '    panel size and positionaing variables
    Dim iGap As Int = 15
    Dim iPanelHeight As Int = 230
    Dim iPanelWidth As Int = 406
    Dim iPanelTop As Int = iGap
    Dim iPanelLeft As Int = iGap
    Dim iTop As Int = iPanelTop
    Dim iLeft As Int = iPanelLeft

    '    display each stock item
    For i = 0 To 14

        '    initialise the panel
        P(i).Initialize("pStockPanel")
        P(i).Tag=i
       
        '    add it to the view pager
        svpStock.Panels(iPanel).AddView(P(i),iLeft,iTop,iPanelWidth,iPanelHeight)

        '    add a label to see which item this is
        Dim lCode As Label
        lCode.Initialize("")
        lCode.TextSize=50
        lCode.TextColor=Colors.Black
        lCode.text = i
        P(i).AddView(lCode,10dip,10dip,380dip,100dip)

        '    check to see if we are advancing horizontally, starting a new line or starting a new page
        If (i+1) Mod 6 = 0 Then
            '    start a new page
            iTop = iPanelTop
            iLeft = iPanelLeft
            iPanel = iPanel + 1
        Else
            If (i+1) Mod 3 = 0 Then
                '    start new row on current page
                iTop = iTop + iPanelHeight + iGap
                iLeft = iPanelLeft
            Else
                '    position to next horizontal entry
                iLeft = iLeft + iPanelWidth + iGap
            End If
        End If
       
    Next
   
    DoEvents
   
    ProgressDialogHide()

End Sub

The attached shows pages 1 and 2 and as you can see page 1 is visible in the background.
If I move to page 3 page 1 is still visible...

Thanks

 

[Erel]

iPanelHeight and width should use dip units.

I don't know whether this is the cause of this problem however you need to add the view pager to the activity.

 

[nibbo]

Tried all of the above but still no change.
The dip's made no difference and the view pager was already added to the activity in Activity_Create.
Why would it only affect the first panel?
Where is the latest library code as it does not appear in the wiki page?
I am using 1.50, is this the latest version?
Thanks

 

[nibbo]

I can be so stupid sometimes.
The code that added the view pager was being executed twice so it actually added two instances of it.
When I scrolled the top view pager it the first one was still visible behind it...
Sorry Erel.