objects/button.c

   1 /*
   2  * button.c - button managing
   3  *
   4  * Copyright © 2007-2009 Julien Danjou <julien@danjou.info>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  *
  20  */
  21
  22 #include "button.h"
  23
  24 /** Create a new mouse button bindings.
  25  * \param L The Lua VM state.
  26  * \return The number of elements pushed on stack.
  27  */
  28 static int
  29 luaA_button_new(lua_State *L)
  30 {
  31     return luaA_class_new(L, &button_class);
  32 }
  33
  34 /** Set a button array with a Lua table.
  35  * \param L The Lua VM state.
  36  * \param oidx The index of the object to store items into.
  37  * \param idx The index of the Lua table.
  38  * \param buttons The array button to fill.
  39  */
  40 void
  41 luaA_button_array_set(lua_State *L, int oidx, int idx, button_array_t *buttons)
  42 {
  43     luaA_checktable(L, idx);
  44
  45     foreach(button, *buttons)
  46         luaA_object_unref_item(L, oidx, *button);
  47
  48     button_array_wipe(buttons);
  49     button_array_init(buttons);
  50
  51     lua_pushnil(L);
  52     while(lua_next(L, idx))
  53         if(luaA_toudata(L, -1, &button_class))
  54             button_array_append(buttons, luaA_object_ref_item(L, oidx, -1));
  55         else
  56             lua_pop(L, 1);
  57 }
  58
  59 /** Push an array of button as an Lua table onto the stack.
  60  * \param L The Lua VM state.
  61  * \param oidx The index of the object to get items from.
  62  * \param buttons The button array to push.
  63  * \return The number of elements pushed on stack.
  64  */
  65 int
  66 luaA_button_array_get(lua_State *L, int oidx, button_array_t *buttons)
  67 {
  68     lua_createtable(L, buttons->len, 0);
  69     for(int i = 0; i < buttons->len; i++)
  70     {
  71         luaA_object_push_item(L, oidx, buttons->tab[i]);
  72         lua_rawseti(L, -2, i + 1);
  73     }
  74     return 1;
  75 }
  76
  77 LUA_OBJECT_EXPORT_PROPERTY(button, button_t, button, lua_pushnumber);
  78 LUA_OBJECT_EXPORT_PROPERTY(button, button_t, modifiers, luaA_pushmodifiers);
  79
  80 static int
  81 luaA_button_set_modifiers(lua_State *L, button_t *b)
  82 {
  83     b->modifiers = luaA_tomodifiers(L, -1);
  84     luaA_object_emit_signal(L, -3, "property::modifiers", 0);
  85     return 0;
  86 }
  87
  88 static int
  89 luaA_button_set_button(lua_State *L, button_t *b)
  90 {
  91     b->button = luaL_checknumber(L, -1);
  92     luaA_object_emit_signal(L, -3, "property::button", 0);
  93     return 0;
  94 }
  95
  96 void
  97 button_class_setup(lua_State *L)
  98 {
  99     static const struct luaL_Reg button_methods[] =
 100     {
 101         LUA_CLASS_METHODS(button)
 102         { "__call", luaA_button_new },
 103         { NULL, NULL }
 104     };
 105
 106     static const struct luaL_Reg button_meta[] =
 107     {
 108         LUA_OBJECT_META(button)
 109         LUA_CLASS_META
 110         { NULL, NULL }
 111     };
 112
 113     luaA_class_setup(L, &button_class, "button", NULL,
 114                      (lua_class_allocator_t) button_new, NULL, NULL,
 115                      luaA_class_index_miss_property, luaA_class_newindex_miss_property,
 116                      button_methods, button_meta);
 117     luaA_class_add_property(&button_class, "button",
 118                             (lua_class_propfunc_t) luaA_button_set_button,
 119                             (lua_class_propfunc_t) luaA_button_get_button,
 120                             (lua_class_propfunc_t) luaA_button_set_button);
 121     luaA_class_add_property(&button_class, "modifiers",
 122                             (lua_class_propfunc_t) luaA_button_set_modifiers,
 123                             (lua_class_propfunc_t) luaA_button_get_modifiers,
 124                             (lua_class_propfunc_t) luaA_button_set_modifiers);
 125
 126     signal_add(&button_class.signals, "press");
 127     signal_add(&button_class.signals, "property::button");
 128     signal_add(&button_class.signals, "property::modifiers");
 129     signal_add(&button_class.signals, "release");
 130 }
 131
 132 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80