GTK4_GG_hack/hot.c

#include <stdio.h>
#include <gtk-4.0/gtk/gtk.h>

#include "warm.h"
#include "cold.h"
#include "display.h"
#include "contain.h"
#include "texts.h"

//  https://docs.gtk.org/gtk4/visual_index.html  <  widgets gallery
//  https://docs.gtk.org/gtk4/section-text-widget.html
//  https://docs.gtk.org/gtk4/class.Widget.html#height-for-width-geometry-management
//  GTK_ORIENTATION_VERTICAL       GTK_ORIENTATION_HORIZONTAL


static void on_experimental_tree_bind_factory (GtkSignalListItemFactory *factory,
                           GObject* object,
                           gpointer user_data);

static void on_experimental_expander_toggled(GtkExpander *expander, gpointer user_data){
  gtk_expander_set_expanded (expander, gtk_expander_get_expanded (expander));
  printf(">  %s\n", gtk_expander_get_label (user_data));
}

void on_experimental_tree_setup_factory (GtkSignalListItemFactory *factory,
                            GObject* object,
                            gpointer user_data)
{
    GtkWidget* expander = gtk_expander_new (NULL);
    gtk_list_item_set_child (GTK_LIST_ITEM(object), expander);
    printf("[on_experimental_tree_setup_factory] here is an expander\n");
}

void create_experimental_tree (GtkBox *experimental_box){
    GtkSignalListItemFactory *factory = GTK_SIGNAL_LIST_ITEM_FACTORY (gtk_signal_list_item_factory_new ());
    g_signal_connect (factory, "setup", G_CALLBACK(on_experimental_tree_setup_factory), NULL);
    g_signal_connect (factory, "bind", G_CALLBACK(on_experimental_tree_bind_factory), NULL);

  GtkExpander *hello = GTK_EXPANDER (gtk_expander_new ("hello !"));
  gtk_expander_set_expanded (GTK_EXPANDER (hello), TRUE);
  gtk_widget_set_margin_start (GTK_WIDGET (hello), 0);
  g_signal_connect (hello, "activate", G_CALLBACK (on_experimental_expander_toggled), hello);
  gtk_box_append (experimental_box, GTK_WIDGET (hello));

  GtkExpander *it_s_me = GTK_EXPANDER (gtk_expander_new ("it's me !"));
  gtk_expander_set_expanded (GTK_EXPANDER (it_s_me), FALSE);
  gtk_widget_set_margin_start(GTK_WIDGET (it_s_me), 20);
  g_signal_connect (it_s_me, "activate", G_CALLBACK (on_experimental_expander_toggled), it_s_me);
  gtk_box_append (experimental_box, GTK_WIDGET (it_s_me));
}















static void on_experimental_tree_bind_factory (GtkSignalListItemFactory *factory,
                           GObject* object,
                           gpointer user_data)
{
//    GObject *item;
    const gchar *text;
    GtkTreeListRow *row;
    GtkListItem *list_item;
    GtkWidget *expander;

    list_item= GTK_LIST_ITEM(object);
    row = gtk_list_item_get_item(list_item);
    if (row != NULL) {
        text = gtk_string_object_get_string(GTK_STRING_OBJECT(gtk_tree_list_row_get_item(row)));
        expander = gtk_list_item_get_child(list_item);
        gtk_expander_set_label(GTK_EXPANDER(expander), text);

        // Disconnect previous signal handlers to avoid stacking them
        //    TODO          g_signal_handlers_disconnect_by_func(expander, G_CALLBACK(on_tree_expander_toggled), row);

        // Connect the signal handler
        //    TODO          g_signal_connect(expander, "activate", G_CALLBACK(on_tree_expander_toggled), row);

        gtk_widget_set_margin_start(expander, gtk_tree_list_row_get_depth(row)*20);
        gboolean is_expanded = gtk_tree_list_row_get_expanded(row);
        printf("[on_experimental_tree_bind_factory] here is %s content and expander is %d\n",
               text,
               is_expanded);
    } else {
        printf("[on_tree_bind_factory] here is NON content\n");
    }
}