widget.h

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/*
   This file is part of darktable,
   Copyright (C) 2015-2021 darktable developers.
 
   darktable 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.
 
   darktable 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 darktable.  If not, see <http://www.gnu.org/licenses/>.
 */
 
#pragma once
 
#include "lua/call.h"
#include "lua/lua.h"
#include <gtk/gtk.h>
struct dt_lua_widget_type_t;
typedef struct {
  GtkWidget *widget;
  struct dt_lua_widget_type_t* type;
} dt_lua_widget_t;
 
typedef dt_lua_widget_t* lua_widget;
 
typedef struct dt_lua_widget_type_t{
  void (*gui_init)(lua_State *L);
  void (*gui_cleanup)(lua_State *L, lua_widget widget);
  const char * name;
  gboolean visible;
  size_t  alloc_size;
  struct dt_lua_widget_type_t *parent;
  // private, do not override
  luaA_Type associated_type;
  GType gtk_type;
} dt_lua_widget_type_t;
 
extern dt_lua_widget_type_t widget_type;
 
 
 
void dt_lua_widget_set_callback(lua_State *L,int index,const char* name);
void dt_lua_widget_get_callback(lua_State *L,int index,const char* name);
int dt_lua_widget_trigger_callback(lua_State *L);
 
/* wrapper to automatically implement a callback on a GTK signal */
#define dt_lua_widget_register_gtk_callback(L,widget_type,signal_name,lua_name,callback) \
  dt_lua_widget_register_gtk_callback_type(L,luaA_type_find(L, #widget_type),signal_name,lua_name,callback)
void dt_lua_widget_register_gtk_callback_type(lua_State *L,luaA_Type type_id,const char* signal_name, const char* lua_name,GCallback callback);
 
 
#define dt_lua_init_widget_type(L, widget_type,lua_type,gtk_type)  \
  dt_lua_init_widget_type_type(L, widget_type, #lua_type,gtk_type)
luaA_Type dt_lua_init_widget_type_type(lua_State *L, dt_lua_widget_type_t* widget_type,const char* lua_type,GType gtk_type);
 
void dt_lua_widget_bind(lua_State *L, lua_widget widget);
void dt_lua_widget_unbind(lua_State *L, lua_widget widget);
 
 
int dt_lua_init_widget(lua_State *L);
 
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