DESCRIPTION.

Donne le focus au controle appelant.

SYNTAXE.

widget.focus_force ( )

widget ⇨ controle quelconque de l'interface [ OBLIGATOIRE ]

.focus_force ( ) ⇨ appel de la méthode [ OBLIGATOIRE ]

REMARQUES.

L'emploi de la méthode tkinter.focus_force ( ) doit ce faire avec parcimonie. Il vaut mieux attendre que le programme donne le focus au controle suite à une action de l'utilisateur. 

Le focus désigne la focalisation du clavier. Quand un controle obtient, reçoit, acquièrent, le focus c'est vers lui que les saisies, faites au clavier par l’utilisateur, seront dirigées.

EXEMPLE.

import tkinter

def FNC_Message ( event ) :

LAB_Focus [ "text" ] = f"{ TKI_Principal.focus_get ( ) } a le focus."

TKI_Principal = tkinter.Tk ( )

BUT_Quitter = tkinter.Button ( TKI_Principal , text = "Quitter" , command = TKI_Principal.destroy )

ENT_A = tkinter.Entry ( TKI_Principal )

ENT_B = tkinter.Entry ( TKI_Principal )

ENT_C = tkinter.Entry ( TKI_Principal )

BUT_A = tkinter.Button ( TKI_Principal , text = "focus⇒" , command = ENT_A.focus_force )

BUT_B = tkinter.Button ( TKI_Principal , text = "focus⇘" , command = ENT_C.focus_force )

BUT_C = tkinter.Button ( TKI_Principal , text = "focus⇗" , command = ENT_B.focus_force )

LAB_Focus = tkinter.Label ( TKI_Principal , text = "focus ?" )

ENT_A.bind ( "<FocusIn>" , FNC_Message )

ENT_B.bind ( "<FocusIn>" , FNC_Message )

ENT_C.bind ( "<FocusIn>" , FNC_Message )

LAB_Focus.grid ( row = 0 , column = 0 , columnspan = 2 , sticky = "nesw" )

BUT_A.grid ( row = 1 , column = 0 , sticky = "nesw" )

ENT_A.grid ( row = 1 , column = 1 , sticky = "nesw" )

BUT_B.grid ( row = 2 , column = 0 , sticky = "nesw" )

ENT_B.grid ( row = 2 , column = 1 , sticky = "nesw" )

BUT_C.grid ( row = 3 , column = 0 , sticky = "nesw" )

ENT_C.grid ( row = 3 , column = 1 , sticky = "nesw" )

BUT_Quitter.grid ( row = 0 , column = 2 , rowspan = 4 , sticky = "nesw" )

TKI_Principal.mainloop ( )