MODULE adw_widgets ;

(*
   m2-GTK4 example - a showcase of the GNOME (libadwaita) widgets bound
   in this slice:

     AdwApplicationWindow > AdwToolbarView
       top bar - AdwHeaderBar with an AdwViewSwitcherTitle
       content - GtkBox >
                   AdwBanner
                   AdwSqueezer (two labels; shows the one that fits)
                   AdwWrapBox (wrapping labels)
                 AdwViewStack  > page "Home"   - AdwAvatar
                               > page "About"  - AdwSpinner + button
                                                  with AdwButtonContent

   Build:  make examples
   Run:    ./build/examples/adw_widgets
*)

FROM Gio IMPORT g_application_run;
FROM AdwApplication IMPORT adw_application_new;
FROM AdwApplicationWindow IMPORT adw_application_window_new,
   adw_application_window_set_content;
FROM AdwHeaderBar IMPORT adw_header_bar_new,
   adw_header_bar_set_title_widget;
FROM AdwToolbarView IMPORT adw_toolbar_view_new, adw_toolbar_view_add_top_bar,
   adw_toolbar_view_set_content;
FROM AdwViewSwitcherTitle IMPORT adw_view_switcher_title_new,
   adw_view_switcher_title_set_title, adw_view_switcher_title_set_subtitle,
   adw_view_switcher_title_set_stack;
FROM AdwViewStack IMPORT adw_view_stack_new, adw_view_stack_add_titled,
   adw_view_stack_add_titled_with_icon;
FROM AdwBanner IMPORT adw_banner_new, adw_banner_set_revealed;
FROM AdwSqueezer IMPORT adw_squeezer_new, adw_squeezer_add;
FROM AdwWrapBox IMPORT adw_wrap_box_new, adw_wrap_box_append;
FROM AdwAvatar IMPORT adw_avatar_new;
FROM AdwSpinner IMPORT adw_spinner_new;
FROM AdwButtonContent IMPORT adw_button_content_new,
   adw_button_content_set_label, adw_button_content_set_icon_name;
FROM GtkWindow IMPORT gtk_window_present, gtk_window_set_default_size;
FROM GtkBox IMPORT gtk_box_new, gtk_box_append, gtk_box_set_spacing;
FROM GtkButton IMPORT gtk_button_new, gtk_button_set_child;
FROM GtkLabel IMPORT gtk_label_new;
FROM GtkEnums IMPORT GtkVertical;
FROM GtkClosures IMPORT Connect2;
FROM SYSTEM IMPORT ADDRESS;
FROM libc IMPORT printf;

CONST
   AppId = "org.example.m2gtk4.AdwWidgets";

PROCEDURE OnActivate (application: ADDRESS; data: ADDRESS);
VAR
   window, toolbar, header, switcherTitle, stack, home, about: ADDRESS;
   box, banner, squeezer, wrap, avatar, spinner, button: ADDRESS;
   content: ADDRESS;
BEGIN
   window := adw_application_window_new(application);
   gtk_window_set_default_size(window, 420, 420);

   stack := adw_view_stack_new();

   (* page: Home *)
   home := gtk_box_new(GtkVertical, 18);
   gtk_box_set_spacing(home, 18);
   avatar := adw_avatar_new(64, "Eric", 1);
   gtk_box_append(home, avatar);
   gtk_box_append(home, gtk_label_new("Welcome to the GNOME widgets demo."));
   content := adw_view_stack_add_titled(stack, home, "home", "Home");

   (* page: About *)
   about := gtk_box_new(GtkVertical, 18);
   gtk_box_set_spacing(about, 18);
   spinner := adw_spinner_new();
   gtk_box_append(about, spinner);
   button := gtk_button_new();
   content := adw_button_content_new();
   adw_button_content_set_icon_name(content, "emblem-system-symbolic");
   adw_button_content_set_label(content, "Preferences");
   gtk_button_set_child(button, content);
   gtk_box_append(about, button);
   content := adw_view_stack_add_titled_with_icon(stack, about, "about",
                                                  "About",
                                                  "help-about-symbolic");

   (* title that becomes a switcher when the window is wide *)
   switcherTitle := adw_view_switcher_title_new();
   adw_view_switcher_title_set_title(switcherTitle, "m2-GTK4");
   adw_view_switcher_title_set_subtitle(switcherTitle, "GNOME widgets");
   adw_view_switcher_title_set_stack(switcherTitle, stack);

   header := adw_header_bar_new();
   adw_header_bar_set_title_widget(header, switcherTitle);

   toolbar := adw_toolbar_view_new();
   adw_toolbar_view_add_top_bar(toolbar, header);

   (* content: banner + squeezer + wrapbox + the stack *)
   box := gtk_box_new(GtkVertical, 12);
   gtk_box_set_spacing(box, 12);

   banner := adw_banner_new("This is an AdwBanner");
   adw_banner_set_revealed(banner, 1);
   gtk_box_append(box, banner);

   squeezer := adw_squeezer_new();
   content := adw_squeezer_add(squeezer, gtk_label_new("Wide layout"));
   content := adw_squeezer_add(squeezer, gtk_label_new("Narrow"));
   gtk_box_append(box, squeezer);

   wrap := adw_wrap_box_new();
   adw_wrap_box_append(wrap, gtk_label_new("one"));
   adw_wrap_box_append(wrap, gtk_label_new("two"));
   adw_wrap_box_append(wrap, gtk_label_new("three"));
   adw_wrap_box_append(wrap, gtk_label_new("four"));
   gtk_box_append(box, wrap);

   gtk_box_append(box, stack);

   adw_toolbar_view_set_content(toolbar, box);
   adw_application_window_set_content(window, toolbar);
   gtk_window_present(window)
END OnActivate;

VAR
   app: ADDRESS;
BEGIN
   app := adw_application_new(AppId, 0);
   IF app = NIL THEN
      printf("adw_application_new failed\n");
      HALT(1)
   END;
   Connect2(app, "activate", OnActivate, NIL);
   g_application_run(app, 0, NIL)
END adw_widgets.