views.c

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/*
    This file is part of the Ansel project.
    Copyright (C) 2023 Alynx Zhou.
    Copyright (C) 2023, 2025 Aurélien PIERRE.
    Copyright (C) 2023 Luca Zulberti.
    Copyright (C) 2026 Guillaume Stutin.
    
    Ansel is free software: you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation, either version 3 of the License, or
    (at your option) any later version.
    
    Ansel is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.
    
    You should have received a copy of the GNU General Public License
    along with Ansel.  If not, see <http://www.gnu.org/licenses/>.
*/
 
#include "common/darktable.h"
#include "common/debug.h"
#include "control/conf.h"
#include "control/control.h"
#include "develop/develop.h"
#include "gui/gtk.h"
 
#include "gui/actions/menu.h"
 
 
gboolean views_active_callback(GtkWidget *menu_item)
{
  // The insensitive view is the one whose name matches the menu item label
  const dt_view_t *current_view = dt_view_manager_get_current_view(darktable.view_manager);
  const char *current_label = get_custom_data(menu_item);
  return !g_strcmp0(current_label, current_view->module_name);
}
 
gboolean views_sensitive_callback(GtkWidget *menu_item)
{
  // The insensitive view is the one whose name matches the menu item label
  const dt_view_t *current_view = dt_view_manager_get_current_view(darktable.view_manager);
  const char *current_label = get_custom_data(menu_item);
  return g_strcmp0(current_label, current_view->module_name);
}
 
#define MACRO_VIEW(view)                                                                                          \
  static gboolean view_switch_to_##view(GtkAccelGroup *group, GObject *acceleratable, guint keyval,               \
                                        GdkModifierType mods, GtkWidget *widget)                                  \
  {                                                                                                               \
    if(views_sensitive_callback(widget))                                                                          \
      dt_ctl_switch_mode_to(#view);                                                                               \
    return TRUE;                                                                                                  \
}
 
MACRO_VIEW(lighttable);
MACRO_VIEW(darkroom);
MACRO_VIEW(print);
MACRO_VIEW(slideshow);
MACRO_VIEW(map);
 
void append_views(GtkWidget **menus, GList **lists, const dt_menus_t index)
{
  for(GList *view_iter = darktable.view_manager->views; view_iter; view_iter = g_list_next(view_iter))
  {
    dt_view_t *view = (dt_view_t *)view_iter->data;
    if(view->flags() & VIEW_FLAGS_HIDDEN) continue;
 
    void *callback = NULL;
    if(!g_strcmp0(view->module_name, "lighttable"))
      callback = view_switch_to_lighttable;
    else if(!g_strcmp0(view->module_name, "darkroom"))
      callback = view_switch_to_darkroom;
    else if(!g_strcmp0(view->module_name, "print"))
      callback = view_switch_to_print;
    else if(!g_strcmp0(view->module_name, "slideshow"))
      callback = view_switch_to_slideshow;
    else if(!g_strcmp0(view->module_name, "map"))
      callback = view_switch_to_map;
 
    guint key = 0;
    if(!g_strcmp0(view->module_name, "lighttable"))
      key = GDK_KEY_Escape;
    else if(!g_strcmp0(view->module_name, "darkroom"))
      key = GDK_KEY_Return;
    else if(!g_strcmp0(view->module_name, "print"))
      key = 0;
    else if(!g_strcmp0(view->module_name, "slideshow"))
      key = 0;
    else if(!g_strcmp0(view->module_name, "map"))
      key = 0;
 
 
    add_no_accel_sub_menu_entry(menus, lists, view->name(view), index, view->module_name, callback,
                       NULL, views_active_callback, views_sensitive_callback, key, 0);
 
    // Darkroom is not handled in global menu since it needs to be opened with an image ID,
    // so we only handle it from filmstrip and lighttable thumbnails.
    // Map and Print are too niche to bother.
  }
}
 
/* TODO ?
* The current logic is to execute state callbacks (active, sensisitive, check) on each menu activation,
* in the menu.h:update_menu_entries() function.
* This is inexpensive as long as there are not too many items.
* The other approach is to connect menu.h:update_entry() to signals, e.g.
 
    DT_DEBUG_CONTROL_SIGNAL_CONNECT(darktable.signals, DT_SIGNAL_VIEWMANAGER_VIEW_CHANGED,
                              G_CALLBACK(update_entry), self);
    DT_DEBUG_CONTROL_SIGNAL_CONNECT(darktable.signals, DT_SIGNAL_VIEWMANAGER_VIEW_CANNOT_CHANGE,
                                    G_CALLBACK(_lib_viewswitcher_view_cannot_change_callback), self);
 
    DT_DEBUG_CONTROL_SIGNAL_DISCONNECT(darktable.signals, G_CALLBACK(update_entry), self);
    DT_DEBUG_CONTROL_SIGNAL_DISCONNECT(darktable.signals, G_CALLBACK(_lib_viewswitcher_view_cannot_change_callback), self);
*
* So the update happens as soon as the signal is emited, only for the relevant menuitems.
*
* To re-evaluate in the future...
*/