[Gambas-user] strange behaviour property visible

[Doriano Blengino]

Jean-Yves F. Barbier ha scritto:
> gb 2.17 debian sid
> ==================
>
> Hi,
>
> I've got something strange: if I don't add a wait line between
> a visible property and a call, it don't work at all:
>
> PUBLIC SUB btnOk_Click()
>   MDB.MyHost = txtbHost.Text
>   MDB.MyDB = txtbDB.Text
>   MDB.MyUsr = txtbLogin.Text
>   MDB.MyPass = txtbPass.Text
>   IF MDB.DBConnect() THEN 
>     lblWait.Visible = TRUE
>     WAIT 0.01	' mandatory otherwise lblWait don't appear
>     MDB.Fill_DB_Tree()
>     lblWait.Visible = FALSE
>     ME.Close
>   ENDIF 
> END
>
>   
It is not strange - it is simply normal.
Screen refresh is done in the main loop (every graphical application 
does so, even in other OSes), so you will not see screen changes when 
your code is running an event handler. If you really want, you put a 
WAIT (may be without parameters: in this case it only calls the main 
loop, which updates the screen, with no added delay).

Regards,
Doriano