OpenEuphoria

Re: Treeview Rant !

• Posted by euman at bellsouth.net Apr 24, 2002
• 378 views

Thanks Derek either I dont understand your responce or
you misinterpreted mine.

25 is never a returned value in vKey = peek(lParam + 12)

If I hold down the shift + tab keys at the same time only
the tab key or '9' is returned.

I might need to use HKM_SETHOTKEY as a work around

Euman

----- Original Message ----- 
From: "Derek Parnell" <ddparnell at bigpond.com>
To: "EUforum" <EUforum at topica.com>
Sent: Wednesday, April 24, 2002 1:59 AM
Subject: RE: Treeview Rant !


> 
> 
> euman at bellsouth.net wrote:
> > Hello all,
> > 
> > I found what I consider to be a bug in the Treeview control
> > 
> > consider this bit of code. ->
> > 
> > elsif iMsg = TVN_KEYDOWN then
> >        vKey = peek(lParam + 12) --struct tagTVKEYDOWN (WORD wVKey)
> >        if vKey = 9 then                                  
> >           SetFocus(futurecontrol) 
> >        elsif vKey = 25 then  -- should be shift+tab    
> >           SetFocus(previouscontrol)                             
> >        end if
> > end if
> > 
> > works really good but what if someone wanted to reverse the taborder 
> > direction
> > for focus purposes? 
> > 
> > shift+tab "or"  shift = 16 + tab = 9  should be vKey = 25
> > but this control doesnt handle this in the right way thus returning vKey 
> > = 9
> > 
> > you cant go backward from a Treeview control, unless someone can provide 
> > a
> > work around...
> > 
> 
> This one way you might like to try:
>  
>   if StandardTabbing then
>       ForwardTab = 9
>       BackwardTab = 25
>   else
>       ForwardTab = 25
>       BackwardTab = 9
>   end if
> 
>  . . . 
> 
>  elsif iMsg = TVN_KEYDOWN then
>         vKey = peek(lParam + 12) --struct tagTVKEYDOWN (WORD wVKey)
>         if vKey = ForwardTab then                                  
>            SetFocus(futurecontrol) 
>         elsif vKey = BackwardTab then  -- should be shift+tab    
>            SetFocus(previouscontrol)                             
>         end if
>  end if
> 
> -------------
> This hightlights the problems of too much hard-coding.
> 
> -----
> Derek.