[Gambas-user] Clicking a TreeView item by program

[Rolf-Werner Eilert]

Am 25.11.2015 13:59, schrieb Benoît Minisini:
> Le 25/11/2015 09:07, Rolf-Werner Eilert a écrit :
>> In one of my older projects, there was kinda timeout after 2 minutes of
>> inactivity. In the TreeView the next parent was jumped at and "clicked"
>> to let the data of the child disappear from screen. This is the code,
>> "baum" is the TreeView:
>>
>>            baum.MoveParent
>>            baum.Item.Selected = True
>>            baum_Click
>>
>> Now in Gambas3, when the program doesn't have the focus anymore, I get a
>> "Null object" error at the baum.Item.Selected line.
>>
>> I know, Item is for the internal cursor. And I want the real cursor. But
>> Current is readonly, right? So how can I set the visible cursor? Or does
>> the error come from something quite different?
>>
>> Regards
>> Rolf
>>
> Provide more code. If baum.Item returns NULL, that should mean that
> MoveParent() failed.
>

Ok, that gives me an idea where to look.

There is not much more code:

Public Sub Timer2_Timer()

   If PrivacyPause Then
     Timer2EventZlr = 1
     Return
   End If

   If Timer2EventZlr > 0 Then
     Timer2EventZlr = 0

   Else
     If tab.Index = 0 Then
       If Left$(baum.Current.Key, 1) = "#" Then
         baum.MoveParent
         baum.Item.Selected = True
         baum_Click
       End If
     Else
       tab.Index = 0
     End If

   End If

End

Every 60 seconds the Timer looks if there is another Tab than 0 open. If 
yes, the first action is to set it back to the first Tab. The next time, 
it should set the cursor from the personal entry (child) back to its 
parent, so the personal data aren't shown anymore and you cannot see who 
was clicked.

Of course, there is a check for activity at some places in the program, 
but this still seems to run as expected. The problem appears only when 
the program window is hidden and has no focus or when it's on another 
screen. Maybe the TreeView "forgets" about its position then?

Regards
Rolf