Mercurial > sdl-ios-xcode
annotate src/events/SDL_mouse.c @ 4387:72d3b4fd918b SDL-1.2
Missing pop over a jump
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Thu, 03 Dec 2009 04:20:46 +0000 |
| parents | 429c8dd3175d |
| children |
| rev | line source |
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| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
| 4159 | 3 Copyright (C) 1997-2009 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
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6 modify it under the terms of the GNU Lesser General Public |
| 0 | 7 License as published by the Free Software Foundation; either |
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8 version 2.1 of the License, or (at your option) any later version. |
| 0 | 9 |
| 10 This library is distributed in the hope that it will be useful, | |
| 11 but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
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13 Lesser General Public License for more details. |
| 0 | 14 |
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15 You should have received a copy of the GNU Lesser General Public |
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16 License along with this library; if not, write to the Free Software |
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| 0 | 18 |
| 19 Sam Lantinga | |
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20 slouken@libsdl.org |
| 0 | 21 */ |
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22 #include "SDL_config.h" |
| 0 | 23 |
| 24 /* General mouse handling code for SDL */ | |
| 25 | |
| 26 #include "SDL_events.h" | |
| 27 #include "SDL_events_c.h" | |
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28 #include "../video/SDL_cursor_c.h" |
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29 #include "../video/SDL_sysvideo.h" |
| 0 | 30 |
| 31 | |
| 32 /* These are static for our mouse handling code */ | |
| 1525 | 33 static Sint16 SDL_MouseX = 0; |
| 34 static Sint16 SDL_MouseY = 0; | |
| 0 | 35 static Sint16 SDL_DeltaX = 0; |
| 36 static Sint16 SDL_DeltaY = 0; | |
| 4249 | 37 static Sint16 SDL_MouseMaxX = 0; |
| 38 static Sint16 SDL_MouseMaxY = 0; | |
| 0 | 39 static Uint8 SDL_ButtonState = 0; |
| 40 | |
| 41 | |
| 42 /* Public functions */ | |
| 43 int SDL_MouseInit(void) | |
| 44 { | |
| 45 /* The mouse is at (0,0) */ | |
| 1525 | 46 SDL_MouseX = 0; |
| 47 SDL_MouseY = 0; | |
| 0 | 48 SDL_DeltaX = 0; |
| 49 SDL_DeltaY = 0; | |
| 4249 | 50 SDL_MouseMaxX = 0; |
| 51 SDL_MouseMaxY = 0; | |
| 0 | 52 SDL_ButtonState = 0; |
| 53 | |
| 54 /* That's it! */ | |
| 55 return(0); | |
| 56 } | |
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57 void SDL_MouseQuit(void) |
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58 { |
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59 } |
| 0 | 60 |
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61 /* We lost the mouse, so post button up messages for all pressed buttons */ |
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62 void SDL_ResetMouse(void) |
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63 { |
| 518 | 64 Uint8 i; |
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65 for ( i = 0; i < sizeof(SDL_ButtonState)*8; ++i ) { |
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66 if ( SDL_ButtonState & SDL_BUTTON(i) ) { |
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67 SDL_PrivateMouseButton(SDL_RELEASED, i, 0, 0); |
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68 } |
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69 } |
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70 } |
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71 |
| 0 | 72 Uint8 SDL_GetMouseState (int *x, int *y) |
| 73 { | |
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74 if ( x ) { |
| 1525 | 75 *x = SDL_MouseX; |
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76 } |
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77 if ( y ) { |
| 1525 | 78 *y = SDL_MouseY; |
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79 } |
| 0 | 80 return(SDL_ButtonState); |
| 81 } | |
| 82 | |
| 83 Uint8 SDL_GetRelativeMouseState (int *x, int *y) | |
| 84 { | |
| 85 if ( x ) | |
| 86 *x = SDL_DeltaX; | |
| 87 if ( y ) | |
| 88 *y = SDL_DeltaY; | |
| 89 SDL_DeltaX = 0; | |
| 90 SDL_DeltaY = 0; | |
| 91 return(SDL_ButtonState); | |
| 92 } | |
| 93 | |
| 94 static void ClipOffset(Sint16 *x, Sint16 *y) | |
| 95 { | |
| 96 /* This clips absolute mouse coordinates when the apparent | |
| 97 display surface is smaller than the real display surface. | |
| 98 */ | |
| 4249 | 99 if ( SDL_VideoSurface && SDL_VideoSurface->offset ) { |
| 0 | 100 *y -= SDL_VideoSurface->offset/SDL_VideoSurface->pitch; |
| 101 *x -= (SDL_VideoSurface->offset%SDL_VideoSurface->pitch)/ | |
| 102 SDL_VideoSurface->format->BytesPerPixel; | |
| 103 } | |
| 104 } | |
| 105 | |
| 4249 | 106 void SDL_SetMouseRange(int maxX, int maxY) |
| 107 { | |
| 108 SDL_MouseMaxX = (Sint16)maxX; | |
| 109 SDL_MouseMaxY = (Sint16)maxY; | |
| 110 } | |
| 111 | |
| 0 | 112 /* These are global for SDL_eventloop.c */ |
| 113 int SDL_PrivateMouseMotion(Uint8 buttonstate, int relative, Sint16 x, Sint16 y) | |
| 114 { | |
| 115 int posted; | |
| 116 Uint16 X, Y; | |
| 117 Sint16 Xrel; | |
| 118 Sint16 Yrel; | |
| 119 | |
| 120 /* Default buttonstate is the current one */ | |
| 121 if ( ! buttonstate ) { | |
| 122 buttonstate = SDL_ButtonState; | |
| 123 } | |
| 124 | |
| 125 Xrel = x; | |
| 126 Yrel = y; | |
| 127 if ( relative ) { | |
| 128 /* Push the cursor around */ | |
| 129 x = (SDL_MouseX+x); | |
| 130 y = (SDL_MouseY+y); | |
| 131 } else { | |
| 132 /* Do we need to clip {x,y} ? */ | |
| 133 ClipOffset(&x, &y); | |
| 134 } | |
| 135 | |
| 136 /* Mouse coordinates range from 0 - width-1 and 0 - height-1 */ | |
| 137 if ( x < 0 ) | |
| 138 X = 0; | |
| 139 else | |
| 4249 | 140 if ( x >= SDL_MouseMaxX ) |
| 141 X = SDL_MouseMaxX-1; | |
| 0 | 142 else |
| 143 X = (Uint16)x; | |
| 144 | |
| 145 if ( y < 0 ) | |
| 146 Y = 0; | |
| 147 else | |
| 4249 | 148 if ( y >= SDL_MouseMaxY ) |
| 149 Y = SDL_MouseMaxY-1; | |
| 0 | 150 else |
| 151 Y = (Uint16)y; | |
| 152 | |
| 153 /* If not relative mode, generate relative motion from clamped X/Y. | |
| 154 This prevents lots of extraneous large delta relative motion when | |
| 155 the screen is windowed mode and the mouse is outside the window. | |
| 156 */ | |
| 1525 | 157 if ( ! relative ) { |
| 0 | 158 Xrel = X-SDL_MouseX; |
| 159 Yrel = Y-SDL_MouseY; | |
| 160 } | |
| 161 | |
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162 /* Drop events that don't change state */ |
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163 if ( ! Xrel && ! Yrel ) { |
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164 #if 0 |
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165 printf("Mouse event didn't change state - dropped!\n"); |
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166 #endif |
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167 return(0); |
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168 } |
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169 |
| 0 | 170 /* Update internal mouse state */ |
| 171 SDL_ButtonState = buttonstate; | |
| 172 SDL_MouseX = X; | |
| 173 SDL_MouseY = Y; | |
| 174 SDL_DeltaX += Xrel; | |
| 175 SDL_DeltaY += Yrel; | |
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176 SDL_MoveCursor(SDL_MouseX, SDL_MouseY); |
| 0 | 177 |
| 178 /* Post the event, if desired */ | |
| 179 posted = 0; | |
| 180 if ( SDL_ProcessEvents[SDL_MOUSEMOTION] == SDL_ENABLE ) { | |
| 181 SDL_Event event; | |
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182 SDL_memset(&event, 0, sizeof(event)); |
| 0 | 183 event.type = SDL_MOUSEMOTION; |
| 184 event.motion.state = buttonstate; | |
| 185 event.motion.x = X; | |
| 186 event.motion.y = Y; | |
| 187 event.motion.xrel = Xrel; | |
| 188 event.motion.yrel = Yrel; | |
| 189 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { | |
| 190 posted = 1; | |
| 191 SDL_PushEvent(&event); | |
| 192 } | |
| 193 } | |
| 194 return(posted); | |
| 195 } | |
| 196 | |
| 197 int SDL_PrivateMouseButton(Uint8 state, Uint8 button, Sint16 x, Sint16 y) | |
| 198 { | |
| 199 SDL_Event event; | |
| 200 int posted; | |
| 201 int move_mouse; | |
| 202 Uint8 buttonstate; | |
| 203 | |
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204 SDL_memset(&event, 0, sizeof(event)); |
| 0 | 205 |
| 206 /* Check parameters */ | |
| 207 if ( x || y ) { | |
| 208 ClipOffset(&x, &y); | |
| 209 move_mouse = 1; | |
| 210 /* Mouse coordinates range from 0 - width-1 and 0 - height-1 */ | |
| 211 if ( x < 0 ) | |
| 212 x = 0; | |
| 213 else | |
| 4249 | 214 if ( x >= SDL_MouseMaxX ) |
| 215 x = SDL_MouseMaxX-1; | |
| 0 | 216 |
| 217 if ( y < 0 ) | |
| 218 y = 0; | |
| 219 else | |
| 4249 | 220 if ( y >= SDL_MouseMaxY ) |
| 221 y = SDL_MouseMaxY-1; | |
| 0 | 222 } else { |
| 223 move_mouse = 0; | |
| 224 } | |
| 225 if ( ! x ) | |
| 226 x = SDL_MouseX; | |
| 227 if ( ! y ) | |
| 228 y = SDL_MouseY; | |
| 229 | |
| 230 /* Figure out which event to perform */ | |
| 231 buttonstate = SDL_ButtonState; | |
| 232 switch ( state ) { | |
| 233 case SDL_PRESSED: | |
| 234 event.type = SDL_MOUSEBUTTONDOWN; | |
| 235 buttonstate |= SDL_BUTTON(button); | |
| 236 break; | |
| 237 case SDL_RELEASED: | |
| 238 event.type = SDL_MOUSEBUTTONUP; | |
| 239 buttonstate &= ~SDL_BUTTON(button); | |
| 240 break; | |
| 241 default: | |
| 242 /* Invalid state -- bail */ | |
| 243 return(0); | |
| 244 } | |
| 245 | |
| 246 /* Update internal mouse state */ | |
| 247 SDL_ButtonState = buttonstate; | |
| 248 if ( move_mouse ) { | |
| 249 SDL_MouseX = x; | |
| 250 SDL_MouseY = y; | |
| 251 SDL_MoveCursor(SDL_MouseX, SDL_MouseY); | |
| 252 } | |
| 253 | |
| 254 /* Post the event, if desired */ | |
| 255 posted = 0; | |
| 256 if ( SDL_ProcessEvents[event.type] == SDL_ENABLE ) { | |
| 257 event.button.state = state; | |
| 258 event.button.button = button; | |
| 259 event.button.x = x; | |
| 260 event.button.y = y; | |
| 261 if ( (SDL_EventOK == NULL) || (*SDL_EventOK)(&event) ) { | |
| 262 posted = 1; | |
| 263 SDL_PushEvent(&event); | |
| 264 } | |
| 265 } | |
| 266 return(posted); | |
| 267 } | |
| 268 |