[Gambas-user] Gridview keypress question

[Benoît Minisini]

Le 06/06/2012 13:29, Richard Terry a écrit :
> Hi List,
>
> I've got a grid with several columns.
>
> If I use the arrow keys, then the grid focus moves up/down or to the
> next/previous column.
>
> I want to over-ride this keypress behaviour, but can't manage it.
>
> If iI even try and detect a keypress n this event, nothing happens
>
> public Sub  Gridview1_Keypress()
>
>   print key.code
>
> end
>
> I''ve looked at the properties and can't seem to find one which will
> allow me to over-ride this behaviour.
> Probably something dumb I'm not seeing.
>
> Any help appreciated.
>

Yep. The problem comes from the Gambas GUi events internal design.

The GridView control is a compound control written in Gambas. 
Consequently, it will see the keyboard events *before* the GridView user.

For native controls, this is the contrary: you get its keyboard events 
before it handles them.

I don't know if I will be able to have the same behaviour in the two 
cases. But I will try. :-)

If you can't wait, there is a workaround: using an Observer on the 
GridView internal ScrollArea to catch the keyboard events before the 
GridView sees them. That way:

MyObserver = New Observer(MyGridView.Children[0]) As "MyGridViewObserver"

...

Public Sub MyGridViewObserver_KeyPress
...
End

Tell me if that workaround actually works.

Regards,

-- 
Benoît Minisini