From 4e616b638133d4cb80df5c1fe0f14ce87ecc5bd6 Mon Sep 17 00:00:00 2001
From: Jean Sirmai <jean@a-lec.org>
Date: Mon, 18 Dec 2023 16:31:04 +0100
Subject: [PATCH] R E C U R S I V E    T R E E   (1st version)  OK

---
 demos/gtk-demo/tree_store.c | 39 +++++++++++++++++++++++--------------
 1 file changed, 24 insertions(+), 15 deletions(-)

diff --git a/demos/gtk-demo/tree_store.c b/demos/gtk-demo/tree_store.c
index d7c56b9..728a02c 100644
--- a/demos/gtk-demo/tree_store.c
+++ b/demos/gtk-demo/tree_store.c
@@ -89,22 +89,33 @@ static TreeItem A[] = {{ "C", C }, { "D", D }, { NULL }};
 static TreeItem R[] = {{ "A", A }, { "B", B }, { NULL }}; //  ROOT
 static TreeItem O[] = {{ "R", R }, { NULL }}; //  Artefact added for symmetry
 
-static GtkTreeStore create_node_recursive (GtkTreeStore *model, TreeItem *current_item)
+static GtkTreeModel *create_node_recursive (GtkTreeStore *model,
+                                            TreeItem *current_item,
+                                            GtkTreeIter *iter_parent,
+                                            int depth)
 {
-  TreeItem   *item_children;
-  GtkTreeIter iter_children, iter_parent;
+  GtkTreeIter iter;
 
-  if (current_item->children) {
-    item_children = current_item->children;
+  if (model == NULL)
+      model = gtk_tree_store_new (NUM_COLUMNS, G_TYPE_STRING);
 
-    while (item_children->label) {
-      gtk_tree_store_append (model, &iter_children, &iter_parent);
-      gtk_tree_store_set (model, &iter_children, COLUMN_0, item_children->label, -1);
-      item_children++;
-      create_node_recursive (model, item_children);
-    }
+  while (current_item->label) {
+    if (0) printf("[%d] Current label : %s\n", depth, current_item->label);
+    gtk_tree_store_append (model, &iter, iter_parent);
+    gtk_tree_store_set (model, &iter, COLUMN_0, current_item->label, -1);
+
+    if (current_item->children)
+      create_node_recursive (model, current_item->children, &iter, depth+1);
+    else
+      break;
+
+    current_item++;
   }
-  return *model;
+
+  if (depth == 0)
+    return GTK_TREE_MODEL(model);
+  else
+    return NULL;
 }
 
 static void create_node (GtkTreeStore *model,
@@ -209,9 +220,7 @@ do_tree_store (GtkWidget *do_widget)
       gtk_box_append (GTK_BOX (vbox), sw);
 
       /* create tree_model */
-      tree_model = create_model ();  //  GtkTreeStore *model = gtk_tree_store_new (NUM_COLUMNS, G_TYPE_STRING);
-      /* tree_store = gtk_tree_store_new (NUM_COLUMNS, G_TYPE_STRING); */
-      /* tree_model = create_node_recursive (*tree_store, O); */
+      tree_model = create_node_recursive (tree_store, R, NULL, 0);
 
       /* create tree view */
       treeview = gtk_tree_view_new_with_model (tree_model);