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   1 /*
   2 This file is part of fxwt, the window system toolkit of 3dengfx.
   3
   4 Copyright (C) 2004, 2005 John Tsiombikas <nuclear@siggraph.org>
   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
  17 along with this program; if not, write to the Free Software
  18 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19 */
  20
  21 /* main fxwt event handling and window system abstraction through SDL.
  22  *
  23  * Author: John Tsiombikas 2004
  24  */
  25
  26 #include "3dengfx_config.h"
  27
  28 #if GFX_LIBRARY == SDL
  29
  30 #include "gfx_library.h"
  31 #include "fxwt.hpp"
  32 #include "3dengfx/3denginefx.hpp"
  33 #include "common/err_msg.h"
  34
  35 #ifdef __unix__
  36 #include <unistd.h>
  37 #ifdef _POSIX_PRIORITY_SCHEDULING
  38 #include <sched.h>
  39 #endif  // _POSIX_PRIORITY_SCHEDULING
  40 #endif  // __unix__
  41
  42 #ifdef WIN32
  43 #include <windows.h>
  44 #endif  // WIN32
  45
  46 using std::list;
  47 using namespace fxwt;
  48
  49 static void handle_event(const SDL_Event &event);
  50
  51 Vector2 fxwt::get_mouse_pos_normalized() {
  52         int x, y;
  53         SDL_GetMouseState(&x, &y);
  54
  55         return Vector2((scalar_t)x / (scalar_t)screenx, (scalar_t)y / (scalar_t)screeny);
  56 }
  57
  58 void fxwt::set_window_title(const char *title) {
  59         SDL_WM_SetCaption(title, 0);
  60 }
  61
  62 void fxwt::swap_buffers() {
  63         SDL_GL_SwapBuffers();
  64 #if defined(_POSIX_PRIORITY_SCHEDULING)
  65         sched_yield();
  66 #elif defined(WIN32)
  67         Sleep(0);
  68 #endif
  69 }
  70
  71 int fxwt::main_loop() {
  72         set_verbosity(3);
  73
  74         SDL_EnableKeyRepeat(300, 20);
  75
  76         while(1) {
  77                 SDL_Event event;
  78
  79                 if(!idle_handlers.empty()) {
  80                         while(SDL_PollEvent(&event)) {
  81                                 handle_event(event);
  82                         }
  83
  84                         list<void (*)()>::iterator iter = idle_handlers.begin();
  85                         while(iter != idle_handlers.end()) {
  86                                 (*iter++)();
  87                         }
  88                 } else {
  89                         SDL_WaitEvent(&event);
  90                         handle_event(event);
  91                 }
  92         }
  93
  94         return 0;
  95 }
  96
  97 static void handle_event(const SDL_Event &event) {
  98         switch(event.type) {
  99         case SDL_KEYDOWN:
 100                 {
 101                         list<void (*)(int)>::iterator iter = keyb_handlers.begin();
 102                         while(iter != keyb_handlers.end()) {
 103                                 (*iter++)(event.key.keysym.sym);
 104                         }
 105                 }
 106                 break;
 107
 108         case SDL_VIDEOEXPOSE:
 109                 {
 110                         list<void (*)()>::iterator iter = disp_handlers.begin();
 111                         while(iter != disp_handlers.end()) {
 112                                 (*iter++)();
 113                         }
 114                 }
 115                 break;
 116
 117         case SDL_MOUSEMOTION:
 118                 {
 119                         list<void (*)(int, int)>::iterator iter = motion_handlers.begin();
 120                         while(iter != motion_handlers.end()) {
 121                                 (*iter++)(event.motion.x, event.motion.y);
 122                         }
 123                 }
 124                 break;
 125
 126         case SDL_MOUSEBUTTONDOWN:
 127         case SDL_MOUSEBUTTONUP:
 128                 {
 129                         button_state[event.button.button] = event.button.state;
 130                         list<void (*)(int, int, int, int)>::iterator iter = button_handlers.begin();
 131                         while(iter != button_handlers.end()) {
 132                                 (*iter++)(event.button.button, event.button.state == SDL_PRESSED, event.button.x, event.button.y);
 133                         }
 134                 }
 135                 break;
 136
 137         case SDL_QUIT:
 138                 exit(0);
 139
 140         default:
 141                 break;
 142         }
 143 }
 144
 145
 146 #endif  // GFX_LIBRARY == SDL