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 #include "luaa.h"
  24 #include "objects/key.h"
  25 #include "common/luaobject.h"
  26
  27 /** Create a new mouse button bindings.
  28  * \param L The Lua VM state.
  29  * \return The number of elements pushed on stack.
  30  */
  31 static int
  32 luaA_button_new(lua_State *L)
  33 {
  34     return luaA_class_new(L, &button_class);
  35 }
  36
  37 /** Set a button array with a Lua table.
  38  * \param L The Lua VM state.
  39  * \param oidx The index of the object to store items into.
  40  * \param idx The index of the Lua table.
  41  * \param buttons The array button to fill.
  42  */
  43 void
  44 luaA_button_array_set(lua_State *L, int oidx, int idx, button_array_t *buttons)
  45 {
  46     luaA_checktable(L, idx);
  47
  48     foreach(button, *buttons)
  49         luaA_object_unref_item(L, oidx, *button);
  50
  51     button_array_wipe(buttons);
  52     button_array_init(buttons);
  53
  54     lua_pushnil(L);
  55     while(lua_next(L, idx))
  56         if(luaA_toudata(L, -1, &button_class))
  57             button_array_append(buttons, luaA_object_ref_item(L, oidx, -1));
  58         else
  59             lua_pop(L, 1);
  60 }
  61
  62 /** Push an array of button as an Lua table onto the stack.
  63  * \param L The Lua VM state.
  64  * \param oidx The index of the object to get items from.
  65  * \param buttons The button array to push.
  66  * \return The number of elements pushed on stack.
  67  */
  68 int
  69 luaA_button_array_get(lua_State *L, int oidx, button_array_t *buttons)
  70 {
  71     lua_createtable(L, buttons->len, 0);
  72     for(int i = 0; i < buttons->len; i++)
  73     {
  74         luaA_object_push_item(L, oidx, buttons->tab[i]);
  75         lua_rawseti(L, -2, i + 1);
  76     }
  77     return 1;
  78 }
  79
  80 LUA_OBJECT_EXPORT_PROPERTY(button, button_t, button, lua_pushnumber);
  81 LUA_OBJECT_EXPORT_PROPERTY(button, button_t, modifiers, luaA_pushmodifiers);
  82
  83 static int
  84 luaA_button_set_modifiers(lua_State *L, button_t *b)
  85 {
  86     b->modifiers = luaA_tomodifiers(L, -1);
  87     luaA_object_emit_signal(L, -3, "property::modifiers", 0);
  88     return 0;
  89 }
  90
  91 static int
  92 luaA_button_set_button(lua_State *L, button_t *b)
  93 {
  94     b->button = luaL_checknumber(L, -1);
  95     luaA_object_emit_signal(L, -3, "property::button", 0);
  96     return 0;
  97 }
  98
  99 void
 100 button_class_setup(lua_State *L)
 101 {
 102     static const struct luaL_Reg button_methods[] =
 103     {
 104         LUA_CLASS_METHODS(button)
 105         { "__call", luaA_button_new },
 106         { NULL, NULL }
 107     };
 108
 109     static const struct luaL_Reg button_meta[] =
 110     {
 111         LUA_OBJECT_META(button)
 112         LUA_CLASS_META
 113         { NULL, NULL }
 114     };
 115
 116     luaA_class_setup(L, &button_class, "button", NULL,
 117                      (lua_class_allocator_t) button_new, NULL, NULL,
 118                      luaA_class_index_miss_property, luaA_class_newindex_miss_property,
 119                      button_methods, button_meta);
 120     luaA_class_add_property(&button_class, "button",
 121                             (lua_class_propfunc_t) luaA_button_set_button,
 122                             (lua_class_propfunc_t) luaA_button_get_button,
 123                             (lua_class_propfunc_t) luaA_button_set_button);
 124     luaA_class_add_property(&button_class, "modifiers",
 125                             (lua_class_propfunc_t) luaA_button_set_modifiers,
 126                             (lua_class_propfunc_t) luaA_button_get_modifiers,
 127                             (lua_class_propfunc_t) luaA_button_set_modifiers);
 128
 129     signal_add(&button_class.signals, "press");
 130     signal_add(&button_class.signals, "property::button");
 131     signal_add(&button_class.signals, "property::modifiers");
 132     signal_add(&button_class.signals, "release");
 133 }
 134
 135 // vim: filetype=c:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:textwidth=80