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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::show_cursor(bool show)
  63 {
  64         SDL_ShowCursor(show ? 1 : 0);
  65 }
  66
  67 void fxwt::swap_buffers() {
  68         SDL_GL_SwapBuffers();
  69 #if defined(_POSIX_PRIORITY_SCHEDULING)
  70         sched_yield();
  71 #elif defined(WIN32)
  72         Sleep(0);
  73 #endif
  74 }
  75
  76 int fxwt::main_loop() {
  77         set_verbosity(3);
  78
  79         SDL_EnableKeyRepeat(300, 20);
  80
  81         while(1) {
  82                 SDL_Event event;
  83
  84                 if(!idle_handlers.empty()) {
  85                         while(SDL_PollEvent(&event)) {
  86                                 handle_event(event);
  87                         }
  88
  89                         list<void (*)()>::iterator iter = idle_handlers.begin();
  90                         while(iter != idle_handlers.end()) {
  91                                 (*iter++)();
  92                         }
  93                 } else {
  94                         SDL_WaitEvent(&event);
  95                         handle_event(event);
  96                 }
  97         }
  98
  99         return 0;
 100 }
 101
 102 static void handle_event(const SDL_Event &event) {
 103         switch(event.type) {
 104         case SDL_KEYDOWN:
 105                 {
 106                         list<void (*)(int)>::iterator iter = keyb_handlers.begin();
 107                         while(iter != keyb_handlers.end()) {
 108                                 (*iter++)(event.key.keysym.sym);
 109                         }
 110                 }
 111                 break;
 112
 113         case SDL_VIDEOEXPOSE:
 114                 {
 115                         list<void (*)()>::iterator iter = disp_handlers.begin();
 116                         while(iter != disp_handlers.end()) {
 117                                 (*iter++)();
 118                         }
 119                 }
 120                 break;
 121
 122         case SDL_MOUSEMOTION:
 123                 {
 124                         list<void (*)(int, int)>::iterator iter = motion_handlers.begin();
 125                         while(iter != motion_handlers.end()) {
 126                                 (*iter++)(event.motion.x, event.motion.y);
 127                         }
 128                 }
 129                 break;
 130
 131         case SDL_MOUSEBUTTONDOWN:
 132         case SDL_MOUSEBUTTONUP:
 133                 {
 134                         button_state[event.button.button] = event.button.state;
 135                         list<void (*)(int, int, int, int)>::iterator iter = button_handlers.begin();
 136                         while(iter != button_handlers.end()) {
 137                                 (*iter++)(event.button.button, event.button.state == SDL_PRESSED, event.button.x, event.button.y);
 138                         }
 139                 }
 140                 break;
 141
 142         case SDL_QUIT:
 143                 exit(0);
 144
 145         default:
 146                 break;
 147         }
 148 }
 149
 150
 151 #endif  // GFX_LIBRARY == SDL