GTK+ Forums

bil · Familiar Face Joined: 27 Mar 2007 Posts: 26

I'm new to gtk+ and want to ask a newbie question, apologise if it has been asked before.

Suppose I create a toplevel gtkwindow, and add a gtkvbox to it. Then I add a menu, a toolbar, a gtkfixed, and a statusbar to the gtkvbox.

Code: (Plaintext)

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window=. 0{:: gtk_window_new <GTK_WINDOW_TOPLEVEL
gtk_window_set_title window ;< id
vbox1=. 0{:: gtk_vbox_new 0 ;< 0
gtk_widget_show <vbox1
gtk_container_add window ;< vbox1
NB. menubar
menubar1=. 0{:: gtk_menu_bar_new ''
gtk_box_pack_start vbox1 ; menubar1 ; 0 ; 0 ;< 0
NB. toolbar
toolbar1=. 0{:: gtk_toolbar_new ''
gtk_box_pack_start vbox1 ; toolbar1 ; 0 ; 0 ;< 0
NB. fixed
fixed1=. 0{:: gtk_fixed_new ''
gtk_widget_show <fixed1
gtk_box_pack_start vbox1 ; fixed1 ; 0 ; 0 ;< 0
NB. statusbar
statusbar1=. 0{:: gtk_statusbar_new ''
gtk_widget_show <statusbar1
gtk_statusbar_set_has_resize_grip statusbar1 ;< 0
gtk_box_pack_start vbox1 ; statusbar1 ; 0 ; 0 ;< 0

Then I want to get the pointer of each child using code

Code: (Plaintext)
1 2 3 4 5 6 7 8 9	NB. get handle of child gtkfixed g1=. 0{:: gtk_container_get_children <window vbox1=. 0{:: g_list_nth_data g1 ;< 0 g2=. 0{:: gtk_container_get_children <vbox1 fixed1=. 0{:: g_list_nth_data g2 ;< 2 NB. menu toolbar fxied statusbar g_list_free <g2 g_list_free <g1

Here fixed1 for g_list_nth_data is the 2 (index-0) child, but I might not create menu or toolbar so that the index method does not always work. What is the better way of finding fixed1?

PS. the programming language I used is not c/c++ but it directly call gtk+ api. Please interpret it as pseudo code for discussion.

openldev · Posted: Tue Apr 03, 2007 11:11 am Post subject:

Well, what you _should_ do is create a structure that holds all of the children and pass that to your function. If you want to use gtk_container_get_children(), use:

Code: (Plaintext)
1 2 3 4	GList list; for (list = g1; list != NULL; list = list->next) if (GTK_IS_FIXED (list->data)) / Use the fixed widget. */

This is in C, but can easily be converted to any other language. By looping like this, you avoid traversing the list on every call to g_list_nth_data().

bil · Familiar Face Joined: 27 Mar 2007 Posts: 26

openldev · Posted: Wed Apr 04, 2007 11:51 am Post subject:

Structures in GTK+ are pure C, so if you look into the implementation of C structures, you can find out.