/**************************************************      R E M E M B E R   !     *****************************************************/
/*                                                                                                                                   */
/*   jean@Project:~/Gem-Graph/gem-graph-client/tree (learning)/The_Gnome_way/gtk$ guix shell -m manifest.scm --check                 */
/*   guix shell: vérification des variables d'environnement visibles depuis le shell « /gnu/store/ --- (a commit) --- /bin/bash »…   */
/*   guix shell: Tout va bien ! Le shell a les bonnes variables d'environnement.                                                     */
/*   jean@Project:~/Gem-Graph/gem-graph-client/tree (learning)/The_Gnome_way/gtk [env] $ cd builddir/                                */
/*   jean@Project:~/Gem-Graph/gem-graph-client/tree (learning)/The_Gnome_way/gtk/builddir [env] $                                    */
/*   jean@Project:~/Gem-Graph/gem-graph-client/tree...way/gtk/builddir [env] $ clear && meson compile && demos/gtk-demo/gtk4-demo    */
/*                                                                                                                                   */
/*     -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --    A  Session   -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- --      */
/*                                                                                                                                   */
/*   jean@Project:~/Gem-Graph/gem-graph-client/tree (learning)/The_Gnome_way/gtk/builddir [env] $ ctrl D  (avant de fermer builder)  */
/*                                                                                                                                   */
/*************************************************************************************************************************************/

// -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   -   - //

/**************************************************              <>              *****************************************************/
/*                                                                                                                                   */
/*  https://developer-old.gnome.org/gtk4/stable/GtkTreeView.html                                                                     */
/*  GtkTreeViewColumn, GtkTreeSelection, GtkTreeModel, GtkTreeView drag-and-drop, GtkTreeSortable, GtkTreeModelSort, GtkListStore,   */
/*  GtkTreeStore, GtkCellRenderer, GtkCellEditable, GtkCellRendererPixbuf, GtkCellRendererText, GtkCellRendererToggle                */
/*                                                                                                                                   */
/*  https://www.gnu.org/software/guile-gnome/docs/gtk/html/GtkCellRenderer.html                                                      */
/*                                                                                                                                   */
/*************************************************************************************************************************************/


/* The GtkTreeStore is used to store data in tree form, to be used later on by a GtkTreeView to display it.
 * This demo builds a simple GtkTreeStore and displays it.
 * If you're new to the GtkTreeView widgets and associates, look into the GtkListStore example first.  */


#include <gtk/gtk.h>
#include <stdio.h>

G_GNUC_BEGIN_IGNORE_DEPRECATIONS


/* TreeItem structure */
typedef struct _TreeItem TreeItem;
struct _TreeItem
{
  const char     *label;
  TreeItem       *children;
};

/* columns */
enum
{
  COLUMN_0,
  NUM_COLUMNS
};

/* tree data */
static TreeItem D[] = {{ "I", NULL }, { "J", NULL }, { "K", NULL }, { NULL }};
static TreeItem C[] = {{ "H", NULL }, { NULL }};
static TreeItem B[] = {{ "E", NULL }, { "F", NULL }, { "G", NULL }, { NULL }};
static TreeItem A[] = {{ "C", C }, { "D", D }, { NULL }};
static TreeItem R[] = {{ "A", A }, { "B", B }, { NULL }};


static GtkTreeModel *
create_model (void)
{
  GtkTreeStore *model;
  GtkTreeIter iter;
  TreeItem *item_0 = R;

  /* create tree store */
  model = gtk_tree_store_new (NUM_COLUMNS,
                              G_TYPE_STRING);

  /* add data to the tree store */
  while (item_0->label)
    {
      TreeItem *item_1 = item_0->children;

      gtk_tree_store_append (model, &iter, NULL);
      gtk_tree_store_set (model, &iter,
                          COLUMN_0, item_0->label,
                          -1);

      /* add children */
      while (item_1->label)
        {
          GtkTreeIter child_iter;

          gtk_tree_store_append (model, &child_iter, &iter);
          gtk_tree_store_set (model, &child_iter,
                              COLUMN_0, item_1->label,
                              -1);

          item_1++;
        }

      item_0++;
    }

  return GTK_TREE_MODEL (model);
}

static void
add_columns (GtkTreeView *treeview)
{
  GtkCellRenderer *renderer;

  renderer = gtk_cell_renderer_text_new (); g_object_set (renderer, "xalign", 0.0, NULL);
  gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview), -1,
      "Col 0", renderer, "text", COLUMN_0, NULL);

  /* renderer = gtk_cell_renderer_text_new (); g_object_set (renderer, "xalign", 0.0, NULL); */
  /* gtk_tree_view_insert_column_with_attributes (GTK_TREE_VIEW (treeview), -1, */
  /*     "Col 1", renderer, "text", COLUMN_1, NULL); */
}

GtkWidget *
do_tree_store (GtkWidget *do_widget)
{
  static GtkWidget *window = NULL;

  if (!window)
    {
      GtkWidget *vbox;
      GtkWidget *sw;
      GtkWidget *treeview;
      GtkTreeModel *model;

      /* create window, etc */
      window = gtk_window_new ();
      //gtk_window_set_display (GTK_WINDOW (window),
      //                        gtk_widget_get_display (do_widget));
      gtk_window_set_title (GTK_WINDOW (window), "Tree Store");
      g_object_add_weak_pointer (G_OBJECT (window), (gpointer *)&window);

      vbox = gtk_box_new (GTK_ORIENTATION_VERTICAL, 8);
      gtk_widget_set_margin_start (vbox, 8);
      gtk_widget_set_margin_end (vbox, 8);
      gtk_widget_set_margin_top (vbox, 8);
      gtk_widget_set_margin_bottom (vbox, 8);
      gtk_window_set_child (GTK_WINDOW (window), vbox);

      gtk_box_append (GTK_BOX (vbox), gtk_label_new ("Learning GTK trees"));

      sw = gtk_scrolled_window_new ();
      gtk_scrolled_window_set_has_frame (GTK_SCROLLED_WINDOW (sw), TRUE);
      gtk_scrolled_window_set_policy (GTK_SCROLLED_WINDOW (sw),
                                      GTK_POLICY_AUTOMATIC,
                                      GTK_POLICY_AUTOMATIC);
      gtk_box_append (GTK_BOX (vbox), sw);

      /* create model */
      model = create_model ();

      /* create tree view */
      treeview = gtk_tree_view_new_with_model (model);
      gtk_widget_set_vexpand (treeview, TRUE);
      g_object_unref (model);
      gtk_tree_selection_set_mode (gtk_tree_view_get_selection (GTK_TREE_VIEW (treeview)),
                                   GTK_SELECTION_MULTIPLE);

      add_columns (GTK_TREE_VIEW (treeview));

      gtk_scrolled_window_set_child (GTK_SCROLLED_WINDOW (sw), treeview);

      /* expand all rows after the treeview widget has been realized */
      g_signal_connect (treeview, "realize",
                        G_CALLBACK (gtk_tree_view_expand_all), NULL);
      gtk_window_set_default_size (GTK_WINDOW (window), 200, 250);
    }

  if (!gtk_widget_get_visible (window))
    gtk_widget_set_visible (window, TRUE);
  else
    gtk_window_destroy (GTK_WINDOW (window));
  
  return window;
}