Re: How Tab brings widgets into focus
hi, so is it like when i press tab key, move_focus signal is emitted, and as its a signal of GtkWindow class. it has a default handler gtk_window_move_focus: which internally calls gtk_widget_child_focus(), which actually emits focus signal of GtkWidget. This signal also has a default handler gtk_widget_real_focus() which calls gtk_widget_grab_focus. But when i looked through the gtkcontainer.c code i found that GtkWidget focus signal handler has been overridden to gtk_container_focus and also has its own set_focus_child signal handler as gtk_container_real_set_focus_child. Or gtk_container signal set_focus_child is being emitted. so which of the GtkWidget focus signal handler is being called the default one or the overridden one in GtkContainer class. David Nečas (Yeti)-2 wrote: On Tue, Jul 17, 2007 at 10:25:42PM -0700, varun_shrivastava wrote: i tried to find out how pressing Tab key brings widgets into focus, but couldn;t find out. Start at the end of gtk_window_class_init() where add_arrow_bindings() and add_tab_bindings() are called and follow from there... I went through the add_arrow_bindings and add_tab_bindings i under stood the flow but not thoroughly, GtkBindingSet *binding contains GtkBindingEntry *entry which contains GtkBindingSignal *signal and in while loop it stores signal information in entry structure. but i didn't find this bindings structure being used after its initialized in gtk_window_class_init(). it should lead you to places such as gtk_container_focus(). Yeti -- http://gwyddion.net/ ___ gtk-devel-list mailing list gtk-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-devel-list -- View this message in context: http://www.nabble.com/How-%22Tab%22-brings-widgets-into-focus-tf4101158.html#a11668199 Sent from the Gtk+ - Dev - General mailing list archive at Nabble.com. ___ gtk-devel-list mailing list gtk-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-devel-list
Re: How Tab brings widgets into focus
On Jul 18, 2007, at 9:02 AM, varun_shrivastava wrote: so which of the GtkWidget focus signal handler is being called the default one or the overridden one in GtkContainer class. An overridden handler always gets called, and has the option to chain up to the default. gtk_container_focus() handles two cases: 1) the container itself can take focus, and 2) the container cannot take focus, but perhaps its children can. The point of overriding this method for a container, then, is to pass the focus on to a child. set-focus-child is a container-specific method to allow container implementations to control which child of the container has or will get focus. In gtk_container_focus_move(), the focus_child is used as the start point for finding the next item in the focus chain. For example: focus chain: A, B, C, D focus child: B gtk_container_focus_move(forward) will see that the current focus child is B, and focus C next. So, set-focus-child is not involved in the call chain resulting from the user hitting the Tab key, but instead can be used by a widget to control programmatically what widget in a specific container will get focus when the user does hit the Tab key. -- me, while driving the car: Okay, girls, what do you want for lunch? yvonne: I wan' noo-tulls! zella: I want lavaloli! Can we go to the lavaloli store? me: Um, where *is* the ravioli store? zella: At the lavaloli store! yvonne: I want noo-tulls! Let's go to the noo-tull store! ___ gtk-devel-list mailing list gtk-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-devel-list
Re: How Tab brings widgets into focus
thanks but one doubt still remains about GtkBindingSet structure which was initialized at the time of gtk_window_class_init, where its being used or how its being used? muppet wrote: On Jul 18, 2007, at 9:02 AM, varun_shrivastava wrote: so which of the GtkWidget focus signal handler is being called the default one or the overridden one in GtkContainer class. An overridden handler always gets called, and has the option to chain up to the default. gtk_container_focus() handles two cases: 1) the container itself can take focus, and 2) the container cannot take focus, but perhaps its children can. The point of overriding this method for a container, then, is to pass the focus on to a child. set-focus-child is a container-specific method to allow container implementations to control which child of the container has or will get focus. In gtk_container_focus_move(), the focus_child is used as the start point for finding the next item in the focus chain. For example: focus chain: A, B, C, D focus child: B gtk_container_focus_move(forward) will see that the current focus child is B, and focus C next. So, set-focus-child is not involved in the call chain resulting from the user hitting the Tab key, but instead can be used by a widget to control programmatically what widget in a specific container will get focus when the user does hit the Tab key. -- me, while driving the car: Okay, girls, what do you want for lunch? yvonne: I wan' noo-tulls! zella: I want lavaloli! Can we go to the lavaloli store? me: Um, where *is* the ravioli store? zella: At the lavaloli store! yvonne: I want noo-tulls! Let's go to the noo-tull store! ___ gtk-devel-list mailing list gtk-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-devel-list -- View this message in context: http://www.nabble.com/How-%22Tab%22-brings-widgets-into-focus-tf4101158.html#a11682233 Sent from the Gtk+ - Dev - General mailing list archive at Nabble.com. ___ gtk-devel-list mailing list gtk-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-devel-list
Re: How Tab brings widgets into focus
On Tue, 2007-07-17 at 22:25 -0700, varun_shrivastava wrote: hi i tried to find out how pressing Tab key brings widgets into focus, but couldn;t find out. For eg if i have created three spin button widget and are held by a container VBox. then pressing tab key switches b/w the spin buttons. I looked through the source code of gtkspinbutton, but couldn't find where key press event related to Tab key is being handled. This behaviour probably ( I'm guessing a bit here ) inherits from GtkWidget. -- Daniel Kasak IT Developer NUS Consulting Group Level 5, 77 Pacific Highway North Sydney, NSW, Australia 2060 T: (+61) 2 9922-7676 / F: (+61) 2 9922 7989 email: [EMAIL PROTECTED] website: http://www.nusconsulting.com.au ___ gtk-devel-list mailing list gtk-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-devel-list
Re: How Tab brings widgets into focus
On Tue, Jul 17, 2007 at 10:25:42PM -0700, varun_shrivastava wrote: i tried to find out how pressing Tab key brings widgets into focus, but couldn;t find out. Start at the end of gtk_window_class_init() where add_arrow_bindings() and add_tab_bindings() are called and follow from there... it should lead you to places such as gtk_container_focus(). Yeti -- http://gwyddion.net/ ___ gtk-devel-list mailing list gtk-devel-list@gnome.org http://mail.gnome.org/mailman/listinfo/gtk-devel-list
