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WIP: how to walk the tree ? Another (small) step...

This commit is contained in:
Jean Sirmai 2023-12-25 01:08:11 +01:00
parent 7b364f0674
commit e9a67bcf4a
Signed by: jean
GPG Key ID: FB3115C340E057E3
1 changed files with 28 additions and 21 deletions
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49
demos/gtk-demo/tree_store.c
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@ -92,18 +92,31 @@ static void iterating_a_model_in_a_depth_first_fashion (GtkTreeModel *model)
// gboolean (*GtkTreeModelForeachFunc) (GtkTreeModel *model, GtkTreePath *path, GtkTreeIter *iter, gpointer data);
GtkTreeIter iter, iter_parent;
gboolean valid = 0;
GtkTreePath *chemin;
char *str_data;
int row_count = 0;
valid = gtk_tree_model_get_iter_first (model, &iter);
if (valid) gtk_tree_model_get (model, &iter, STRING_COLUMN, &str_data, -1);
gtk_tree_model_get_iter_first (model, &iter);
gtk_tree_model_get (model, &iter, STRING_COLUMN, &str_data, -1);
g_print ("first row %d: (%s)\n", row_count, str_data);
valid = gtk_tree_model_iter_children (model, &iter_parent, &iter);
valid = gtk_tree_model_iter_children (model, &iter, &iter_parent);
gtk_tree_model_iter_children (model, &iter_parent, &iter);
gtk_tree_model_iter_children (model, &iter, &iter_parent); // Sets iter to point to the first child of parent.
//gtk_tree_model_iter_next (model, &iter);
if (valid) gtk_tree_model_get (model, &iter, STRING_COLUMN, &str_data, -1);
g_print ("next row %d: (%s)\n", row_count, str_data);
gtk_tree_model_get (model, &iter, STRING_COLUMN, &str_data, -1);
g_print ("next row %d: (%s) < False (should be 'A' - line 104)\n", row_count, str_data);
chemin = gtk_tree_path_new_from_string ("0:0:0:1:0:1");
gtk_tree_model_get_iter (model, &iter, chemin);
gtk_tree_model_get (model, &iter, STRING_COLUMN, &str_data, -1);
g_print ("row from path 0:0:0:1:0:1 %d = (%s)\n", row_count, str_data);
gtk_tree_path_free (chemin);
/* GtkTreeIter parent_iter; gtk_tree_model_iter_nth_child (my_tree_model, &iter, NULL, 3); // walk the tree to find the iterator */
/* parent_iter = iter; gtk_tree_model_iter_nth_child (my_tree_model, &iter, &parent_iter, 2); */
/* parent_iter = iter; gtk_tree_model_iter_nth_child (my_tree_model, &iter, &parent_iter, 5); */
/* while (valid) first row 0: (ROOT) next row 0: (D)*/
/* { */
@ -121,20 +134,14 @@ static void iterating_a_model_in_a_depth_first_fashion (GtkTreeModel *model)
}
// Three ways of getting the iter pointing to the location https://developer-old.gnome.org/gtk4/stable/GtkTreeModel.html#gtk-tree-row-reference-new
static void acquiring_a_GtkTreeIter (GtkTreeModel *my_tree_model, GtkTreePath *my_tree_path)
{
GtkTreeIter iter; // get the iterator from a string
gtk_tree_model_get_iter_from_string (my_tree_model, &iter, gtk_tree_path_to_string (my_tree_path));
g_print ("acquiring_a_GtkTreeIter from path : [ %s ] (lines 225 & 108)\n", gtk_tree_path_to_string (my_tree_path));
my_tree_path = gtk_tree_path_new_from_string (gtk_tree_path_to_string (my_tree_path)); // get the iterator from a path
gtk_tree_model_get_iter (my_tree_model, &iter, my_tree_path);
gtk_tree_path_free (my_tree_path);
/* GtkTreeIter parent_iter; gtk_tree_model_iter_nth_child (my_tree_model, &iter, NULL, 3); // walk the tree to find the iterator */
/* parent_iter = iter; gtk_tree_model_iter_nth_child (my_tree_model, &iter, &parent_iter, 2); */
/* parent_iter = iter; gtk_tree_model_iter_nth_child (my_tree_model, &iter, &parent_iter, 5); */
}
/* static void acquiring_a_GtkTreeIter (GtkTreeModel *my_tree_model, GtkTreePath *my_tree_path) */
/* { */
/* GtkTreeIter iter; // get the iterator from a string */
/* gtk_tree_model_get_iter (model, &iter, my_tree_path); */
/* gtk_tree_model_get (model, &iter, STRING_COLUMN, &str_data, -1); */
/* g_print ("row from path %s %d = (%s)\n", gtk_tree_path_to_string (my_tree_path), row_count, str_data); */
/* gtk_tree_path_free (my_tree_path); */
/* } */
static void /* https://developer-old.gnome.org/gtk4/stable/GtkTreeModel.html#GtkTreePath-struct and #gtk-tree-row-reference-new */
edit_a_cell (GtkTreeModel *my_tree_model,
@ -251,7 +258,7 @@ do_tree_store (GtkWidget *do_widget)
my_tree_model = create_node_recursive (my_tree_store, O, NULL, 0);
iterating_a_model_in_a_depth_first_fashion (my_tree_model);
GtkTreePath *my_path = gtk_tree_path_new_from_string ("0:0:1:0:1");
acquiring_a_GtkTreeIter (my_tree_model, my_path);
// acquiring_a_GtkTreeIter (my_tree_model, my_path);
// GtkTreeIter *my_iter; edit_a_cell (my_tree_model, NULL, my_iter, NULL, my_path);
/* create tree view */