From a54454556afea17fcea619abc4e59cc05a4760f3 Mon Sep 17 00:00:00 2001
From: Jean Sirmai <jean@a-lec.org>
Date: Tue, 23 Jan 2024 12:10:37 +0100
Subject: [PATCH] WIP: unbind_cb() and teardown_cb() seems to have no effect.
 Why ?

---
 src/ui/sand_box.c | 35 +++++++++++++++++++++++++++--------
 1 file changed, 27 insertions(+), 8 deletions(-)

diff --git a/src/ui/sand_box.c b/src/ui/sand_box.c
index 0d8db4f..1bfee44 100644
--- a/src/ui/sand_box.c
+++ b/src/ui/sand_box.c
@@ -45,15 +45,20 @@ static void bind_cb (GtkSignalListItemFactory *self, GtkListItem *my_list_item,
   gtk_label_set_text (GTK_LABEL (my_label), gtk_string_object_get_string (my_string_object));
 }
 
-static void on_selection_change (GtkSelectionModel* self,  guint position, guint n_items, gpointer user_data)
+static void unbind_cb   (GtkSignalListItemFactory *self, GtkListItem *listitem, GtkSelectionModel *my_selection_model)
+    {printf("list size = %d\n", g_list_model_get_n_items (my_selection_model));}
+static void teardown_cb (GtkSignalListItemFactory *self, GtkListItem *listitem, gpointer user_data) {}
+  /* GtkListItem instance will be destroyed soon. You don't need to set the child to NULL. */
+
+static void on_selection_change (GtkSelectionModel* my_selection_model,  guint position, guint n_items, gpointer user_data)
 {
     printf("list size = %d    item type = %d\
     position (premier élement ayant changé d'état) = %2d %7s\
     nombre d'éléments ayant changé d'état = %2d\n",
-        g_list_model_get_n_items (self),
-        g_list_model_get_item_type(self),
+        g_list_model_get_n_items (my_selection_model),
+        g_list_model_get_item_type(my_selection_model),
         position,
-        gtk_string_object_get_string(g_list_model_get_item(self, position)),
+        gtk_string_object_get_string(g_list_model_get_item(my_selection_model, position)),
         n_items );
 }
 
@@ -74,7 +79,15 @@ static void and_now_let_s_climb_that_tree (GtkWidget *in_that_box)
     GtkListItemFactory *my_factory = gtk_signal_list_item_factory_new ();
     g_signal_connect (my_factory, "setup", G_CALLBACK (setup_cb), NULL);
     g_signal_connect (my_factory, "bind", G_CALLBACK (bind_cb), NULL);
-    g_signal_connect (my_selection_model, "selection-changed", G_CALLBACK (on_selection_change), NULL);
+    if (0) g_signal_connect (my_selection_model, "selection-changed", G_CALLBACK (on_selection_change), NULL);
+    g_signal_connect (my_factory, "unbind", G_CALLBACK (unbind_cb), my_selection_model);
+    g_signal_connect (my_factory, "teardown", G_CALLBACK (teardown_cb), NULL);
+
+    /* GtkWidget *treeview; */
+    /* treeview = gtk_tree_view_new_with_model (my_selection_model); */
+    /* gtk_widget_set_vexpand (treeview, TRUE); */
+    /* gtk_tree_view_set_search_column (GTK_TREE_VIEW (treeview), */
+    /*                                COLUMN_DESCRIPTION); */
 
     GtkWidget *my_list_view = gtk_list_view_new (GTK_SELECTION_MODEL (my_selection_model), my_factory);
     gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (in_that_box), my_list_view);
@@ -96,10 +109,16 @@ void on_activate_window_creation (GtkApplication *app, gpointer data) {
     if (data) {g_print (data);  g_print (" and is displayed by [sand_box.c / on_activate_window_creation()]\n");}
 }
 
-//--------------------------------------------------------------------     notes
+//----------------------------------------------------------------|   mes notes.
 
 //  guix shell -m manifest.scm && pkg-config --libs gtk4      make clean && clear && time make run
 //  my local widgets examples are in user/jean/01/GTK4/tree (learning)/The_Gnome_way/demos/gtk-demo
-//           https://toshiocp.github.io/Gtk4-tutorial/sec29.html
-//  factory = GtkSignalListItemFactory(setup_cb, bind_cb)
+//
+//  tout ce qui commence par gtk... est un widget   ex: "my_selection_model" est un widget ??
+//  factory = GtkSignalListItemFactory(setup_cb, bind_cb)  <<<
+//  gtk_widget_set_visible(...)   <<<
+//
+//              GtkColumnView
+//
+// https://toshiocp.github.io/Gtk4-tutorial/sec29.html