modules ? how to ?

main.c

@@ -1,4 +1,5 @@
 #include <gtk/gtk.h>
+#include "./warm.h"
 
 static void print (GtkWidget *widget, gpointer data) {g_print (data);}
 
@@ -10,17 +11,22 @@ static void activate (GtkApplication *app, gpointer user_data) {
   GtkWidget *button_4 = gtk_button_new_with_label ("IV");
   GtkWidget *button_5 = gtk_button_new_with_label ("V");
 
+  char *text = "niofnein";
+  printf("in main.c : %s\n", text);
+//  print_text(text);
+
   GtkWidget *window   = gtk_application_window_new (app);
   GtkWidget *titlebar = gtk_header_bar_new();
 
   GtkWidget *switcher = gtk_stack_switcher_new();
 //  GtkWidget *sidebar  = gtk_stack_sidebar_new();
   GtkStack  *stack    = GTK_STACK (gtk_stack_new());
+  GtkWidget *page_0   = gtk_paned_new(GTK_ORIENTATION_VERTICAL);
   GtkWidget *page_1   = gtk_paned_new(GTK_ORIENTATION_VERTICAL);
-  GtkWidget *page_2   = gtk_paned_new(GTK_ORIENTATION_VERTICAL);
   GtkWidget *grid     = gtk_grid_new();
-  GtkWidget *grid_3   = gtk_grid_new();
+//  GtkWidget *grid_1   = gtk_grid_new();
   GtkWidget *box      = gtk_box_new (0, 6); // 6 = spacing
+  GtkWidget *box_1    = gtk_box_new (0, 6); // 6 = spacing
 
   gtk_window_set_title (GTK_WINDOW (window), "Window");
   gtk_widget_set_size_request (window, 60, 0);
@@ -37,17 +43,22 @@ static void activate (GtkApplication *app, gpointer user_data) {
   gtk_grid_attach (GTK_GRID (grid), button_0, 0, 1, 2, 1);
   gtk_box_append (GTK_BOX (box), button_3);
   gtk_box_append (GTK_BOX (box), button_4);
+  gtk_box_append (GTK_BOX (box_1), button_5);
+
+
   gtk_grid_attach (GTK_GRID (grid), box, 0, 2, 2, 1);
 
 // https://developer-old.gnome.org/gtk4/stable/GtkStack.html
 // https://developer.gnome.org/documentation/index.html
 // https://docs.gtk.org/gtk4/enum.AccessibleRole.html
 
-//  GtkToggleButton *tb1 =  GTK_TOGGLE_BUTTON (gtk_button_new_with_label ("tb1"));
+  gtk_stack_add_titled (stack, page_0, "n°0", "A");
-  gtk_stack_add_titled (stack, page_1, "n°0", "A");
+  gtk_stack_add_titled (stack, page_1, "n°1", "B");
-  gtk_stack_add_titled (stack, page_2, "n°1", "B");
+  GtkStackPage *page_2 =  gtk_stack_add_titled (stack, box_1, "any name", "C");
-  GtkStackPage *page_3 =  gtk_stack_add_titled (stack, grid_3, "n°2", "C");
+  gtk_stack_page_set_name (page_2, "n°2");
-  gtk_grid_attach (GTK_GRID (grid_3), button_5, 0, 0, 1, 1);
+
+
+//  gtk_grid_attach (GTK_GRID (grid_1), button_5, 0, 0, 1, 1);
 
 
   gtk_orientable_set_orientation (GTK_ORIENTABLE (switcher), GTK_ORIENTATION_VERTICAL);
@@ -56,17 +67,12 @@ static void activate (GtkApplication *app, gpointer user_data) {
   gtk_stack_switcher_set_stack (GTK_STACK_SWITCHER (switcher), stack);
 //  gtk_stack_sidebar_set_stack (GTK_STACK_SIDEBAR (sidebar), stack);
 
-//  gtk_stack_page_get_child (GTK_STACK_PAGE(page_1));
-  gtk_stack_page_set_name (GTK_STACK_PAGE(page_3), "new name");
-
   GtkSelectionModel *stack_selection_model = gtk_stack_get_pages (stack);
   gtk_selection_model_select_item (stack_selection_model, 2, 1);
-//  gtk_stack_set_visible_child_name (stack, "n°3");
 
-  printf("selected page name is [%s]  (can't get its title !)\n",
+  printf("selected page name is [%s]  (how do I get its title ?)\n",
           gtk_stack_get_visible_child_name (stack));
-  gtk_stack_set_transition_type (GTK_STACK (stack),
+//  gtk_stack_set_transition_type (GTK_STACK (stack), GTK_STACK_TRANSITION_TYPE_CROSSFADE);
-                               GTK_STACK_TRANSITION_TYPE_CROSSFADE);
 
   gtk_grid_attach (GTK_GRID (grid), switcher, 0, 3, 2, 1);
   gtk_window_present (GTK_WINDOW (window));

warm.c

@@ -0,0 +1,15 @@
+#pragma once
+#include <unistd.h>
+#include <stdio.h>
+#include <gtk-4.0/gtk/gtk.h>
+
+             button_0 = gtk_button_new_with_label ("Quit");
+  GtkWidget *button_1 = gtk_button_new_with_label ("I");
+  GtkWidget *button_2 = gtk_button_new_with_label ("II");
+  GtkWidget *button_3 = gtk_button_new_with_label ("III");
+  GtkWidget *button_4 = gtk_button_new_with_label ("IV");
+  GtkWidget *button_5 = gtk_button_new_with_label ("V");
+
+//  GtkToggleButton *tb1 =  GTK_TOGGLE_BUTTON (gtk_button_new_with_label ("tb1"));
+
+void print_text(char *text) {printf("in warm.c : %s\n", text);}

warm.h

@@ -0,0 +1,24 @@
+#pragma once
+#include <assert.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <math.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdbool.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+#include <glib-2.0/glib.h>
+#include <gtk-4.0/gtk/gtk.h>
+
+extern GtkWidget *button_0;
+extern GtkWidget *button_1;
+extern GtkWidget *button_2;
+extern GtkWidget *button_3;
+extern GtkWidget *button_4;
+extern GtkWidget *button_5;
+
+void print_text(char *text);
+