Mercurial > sdl-ios-xcode
annotate docs/html/sdlevent.html @ 693:6c119628180d
Date: Sat, 16 Aug 2003 16:22:56 +0300
From: "Mike Gorchak"
Subject: Package building for QNX6
I'm just completed the package description file for QNX6 - qpg, it is like a\
.spec files for Linux. Please place SDL.qpg.in file in the root of the proj\
ect, where .spec file is placed. And sdl12qpg.diff - just adding the SDL.qpg\
.in. The same for the SDL_image. I'm planning to add .qpg files creation for\
all SDL* projects.
As for shared library building for QNX6. It is very hard to improve the exis\
ting libtool code to support QNX shared libraries. Much easyiest is to remov\
e libtool.m4 code from the acinclude.m4 for those persons, who building shar\
ed libraries for QNX6. I'm described all what they need to do with .so under\
QNX6 in the README.QNX file. And 90% of people used the precompiled librari\
es, so I think it is not big problem :)
| author | Sam Lantinga <slouken@libsdl.org> |
|---|---|
| date | Sat, 23 Aug 2003 23:25:46 +0000 |
| parents | e5bc29de3f0a |
| children | 355632dca928 |
| rev | line source |
|---|---|
| 0 | 1 <HTML |
| 2 ><HEAD | |
| 3 ><TITLE | |
| 4 >SDL_Event</TITLE | |
| 5 ><META | |
| 6 NAME="GENERATOR" | |
|
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7 CONTENT="Modular DocBook HTML Stylesheet Version 1.64 |
| 0 | 8 "><LINK |
| 9 REL="HOME" | |
| 10 TITLE="SDL Library Documentation" | |
| 11 HREF="index.html"><LINK | |
| 12 REL="UP" | |
| 13 TITLE="SDL Event Structures." | |
| 14 HREF="eventstructures.html"><LINK | |
| 15 REL="PREVIOUS" | |
| 16 TITLE="SDL Event Structures." | |
| 17 HREF="eventstructures.html"><LINK | |
| 18 REL="NEXT" | |
| 19 TITLE="SDL_ActiveEvent" | |
| 20 HREF="sdlactiveevent.html"></HEAD | |
| 21 ><BODY | |
| 22 CLASS="REFENTRY" | |
| 23 BGCOLOR="#FFF8DC" | |
| 24 TEXT="#000000" | |
| 25 LINK="#0000ee" | |
| 26 VLINK="#551a8b" | |
| 27 ALINK="#ff0000" | |
| 28 ><DIV | |
| 29 CLASS="NAVHEADER" | |
| 30 ><TABLE | |
| 31 WIDTH="100%" | |
| 32 BORDER="0" | |
| 33 CELLPADDING="0" | |
| 34 CELLSPACING="0" | |
| 35 ><TR | |
| 36 ><TH | |
| 37 COLSPAN="3" | |
| 38 ALIGN="center" | |
| 39 >SDL Library Documentation</TH | |
| 40 ></TR | |
| 41 ><TR | |
| 42 ><TD | |
| 43 WIDTH="10%" | |
| 44 ALIGN="left" | |
| 45 VALIGN="bottom" | |
| 46 ><A | |
| 47 HREF="eventstructures.html" | |
| 48 >Prev</A | |
| 49 ></TD | |
| 50 ><TD | |
| 51 WIDTH="80%" | |
| 52 ALIGN="center" | |
| 53 VALIGN="bottom" | |
| 54 ></TD | |
| 55 ><TD | |
| 56 WIDTH="10%" | |
| 57 ALIGN="right" | |
| 58 VALIGN="bottom" | |
| 59 ><A | |
| 60 HREF="sdlactiveevent.html" | |
| 61 >Next</A | |
| 62 ></TD | |
| 63 ></TR | |
| 64 ></TABLE | |
| 65 ><HR | |
| 66 ALIGN="LEFT" | |
| 67 WIDTH="100%"></DIV | |
| 68 ><H1 | |
| 69 ><A | |
| 70 NAME="SDLEVENT" | |
| 71 >SDL_Event</A | |
| 72 ></H1 | |
| 73 ><DIV | |
| 74 CLASS="REFNAMEDIV" | |
| 75 ><A | |
|
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76 NAME="AEN3327" |
| 0 | 77 ></A |
| 78 ><H2 | |
| 79 >Name</H2 | |
| 80 >SDL_Event -- General event structure</DIV | |
| 81 ><DIV | |
| 82 CLASS="REFSECT1" | |
| 83 ><A | |
|
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84 NAME="AEN3330" |
| 0 | 85 ></A |
| 86 ><H2 | |
| 87 >Structure Definition</H2 | |
| 88 ><PRE | |
| 89 CLASS="PROGRAMLISTING" | |
| 90 >typedef union{ | |
| 91 Uint8 type; | |
| 92 SDL_ActiveEvent active; | |
| 93 SDL_KeyboardEvent key; | |
| 94 SDL_MouseMotionEvent motion; | |
| 95 SDL_MouseButtonEvent button; | |
| 96 SDL_JoyAxisEvent jaxis; | |
| 97 SDL_JoyBallEvent jball; | |
| 98 SDL_JoyHatEvent jhat; | |
| 99 SDL_JoyButtonEvent jbutton; | |
| 100 SDL_ResizeEvent resize; | |
|
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101 SDL_ExposeEvent expose; |
| 0 | 102 SDL_QuitEvent quit; |
| 103 SDL_UserEvent user; | |
| 104 SDL_SywWMEvent syswm; | |
| 105 } SDL_Event;</PRE | |
| 106 ></DIV | |
| 107 ><DIV | |
| 108 CLASS="REFSECT1" | |
| 109 ><A | |
|
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110 NAME="AEN3333" |
| 0 | 111 ></A |
| 112 ><H2 | |
| 113 >Structure Data</H2 | |
| 114 ><DIV | |
| 115 CLASS="INFORMALTABLE" | |
| 116 ><A | |
|
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117 NAME="AEN3335" |
| 0 | 118 ></A |
| 119 ><P | |
| 120 ></P | |
| 121 ><TABLE | |
| 122 BORDER="0" | |
| 123 CLASS="CALSTABLE" | |
| 124 ><TBODY | |
| 125 ><TR | |
| 126 ><TD | |
| 127 ALIGN="LEFT" | |
| 128 VALIGN="TOP" | |
| 129 ><TT | |
| 130 CLASS="STRUCTFIELD" | |
| 131 ><I | |
| 132 >type</I | |
| 133 ></TT | |
| 134 ></TD | |
| 135 ><TD | |
| 136 ALIGN="LEFT" | |
| 137 VALIGN="TOP" | |
| 138 >The type of event</TD | |
| 139 ></TR | |
| 140 ><TR | |
| 141 ><TD | |
| 142 ALIGN="LEFT" | |
| 143 VALIGN="TOP" | |
| 144 ><TT | |
| 145 CLASS="STRUCTFIELD" | |
| 146 ><I | |
| 147 >active</I | |
| 148 ></TT | |
| 149 ></TD | |
| 150 ><TD | |
| 151 ALIGN="LEFT" | |
| 152 VALIGN="TOP" | |
| 153 ><A | |
| 154 HREF="sdlactiveevent.html" | |
| 155 >Activation event</A | |
| 156 ></TD | |
| 157 ></TR | |
| 158 ><TR | |
| 159 ><TD | |
| 160 ALIGN="LEFT" | |
| 161 VALIGN="TOP" | |
| 162 ><TT | |
| 163 CLASS="STRUCTFIELD" | |
| 164 ><I | |
| 165 >key</I | |
| 166 ></TT | |
| 167 ></TD | |
| 168 ><TD | |
| 169 ALIGN="LEFT" | |
| 170 VALIGN="TOP" | |
| 171 ><A | |
| 172 HREF="sdlkeyboardevent.html" | |
| 173 >Keyboard event</A | |
| 174 ></TD | |
| 175 ></TR | |
| 176 ><TR | |
| 177 ><TD | |
| 178 ALIGN="LEFT" | |
| 179 VALIGN="TOP" | |
| 180 ><TT | |
| 181 CLASS="STRUCTFIELD" | |
| 182 ><I | |
| 183 >motion</I | |
| 184 ></TT | |
| 185 ></TD | |
| 186 ><TD | |
| 187 ALIGN="LEFT" | |
| 188 VALIGN="TOP" | |
| 189 ><A | |
| 190 HREF="sdlmousemotionevent.html" | |
| 191 >Mouse motion event</A | |
| 192 ></TD | |
| 193 ></TR | |
| 194 ><TR | |
| 195 ><TD | |
| 196 ALIGN="LEFT" | |
| 197 VALIGN="TOP" | |
| 198 ><TT | |
| 199 CLASS="STRUCTFIELD" | |
| 200 ><I | |
| 201 >button</I | |
| 202 ></TT | |
| 203 ></TD | |
| 204 ><TD | |
| 205 ALIGN="LEFT" | |
| 206 VALIGN="TOP" | |
| 207 ><A | |
| 208 HREF="sdlmousebuttonevent.html" | |
| 209 >Mouse button event</A | |
| 210 ></TD | |
| 211 ></TR | |
| 212 ><TR | |
| 213 ><TD | |
| 214 ALIGN="LEFT" | |
| 215 VALIGN="TOP" | |
| 216 ><TT | |
| 217 CLASS="STRUCTFIELD" | |
| 218 ><I | |
| 219 >jaxis</I | |
| 220 ></TT | |
| 221 ></TD | |
| 222 ><TD | |
| 223 ALIGN="LEFT" | |
| 224 VALIGN="TOP" | |
| 225 ><A | |
| 226 HREF="sdljoyaxisevent.html" | |
| 227 >Joystick axis motion event</A | |
| 228 ></TD | |
| 229 ></TR | |
| 230 ><TR | |
| 231 ><TD | |
| 232 ALIGN="LEFT" | |
| 233 VALIGN="TOP" | |
| 234 ><TT | |
| 235 CLASS="STRUCTFIELD" | |
| 236 ><I | |
| 237 >jball</I | |
| 238 ></TT | |
| 239 ></TD | |
| 240 ><TD | |
| 241 ALIGN="LEFT" | |
| 242 VALIGN="TOP" | |
| 243 ><A | |
| 244 HREF="sdljoyballevent.html" | |
| 245 >Joystick trackball motion event</A | |
| 246 ></TD | |
| 247 ></TR | |
| 248 ><TR | |
| 249 ><TD | |
| 250 ALIGN="LEFT" | |
| 251 VALIGN="TOP" | |
| 252 ><TT | |
| 253 CLASS="STRUCTFIELD" | |
| 254 ><I | |
| 255 >jhat</I | |
| 256 ></TT | |
| 257 ></TD | |
| 258 ><TD | |
| 259 ALIGN="LEFT" | |
| 260 VALIGN="TOP" | |
| 261 ><A | |
| 262 HREF="sdljoyhatevent.html" | |
| 263 >Joystick hat motion event</A | |
| 264 ></TD | |
| 265 ></TR | |
| 266 ><TR | |
| 267 ><TD | |
| 268 ALIGN="LEFT" | |
| 269 VALIGN="TOP" | |
| 270 ><TT | |
| 271 CLASS="STRUCTFIELD" | |
| 272 ><I | |
| 273 >jbutton</I | |
| 274 ></TT | |
| 275 ></TD | |
| 276 ><TD | |
| 277 ALIGN="LEFT" | |
| 278 VALIGN="TOP" | |
| 279 ><A | |
| 280 HREF="sdljoybuttonevent.html" | |
| 281 >Joystick button event</A | |
| 282 ></TD | |
| 283 ></TR | |
| 284 ><TR | |
| 285 ><TD | |
| 286 ALIGN="LEFT" | |
| 287 VALIGN="TOP" | |
| 288 ><TT | |
| 289 CLASS="STRUCTFIELD" | |
| 290 ><I | |
| 291 >resize</I | |
| 292 ></TT | |
| 293 ></TD | |
| 294 ><TD | |
| 295 ALIGN="LEFT" | |
| 296 VALIGN="TOP" | |
| 297 ><A | |
| 298 HREF="sdlresizeevent.html" | |
| 299 >Application window resize event</A | |
| 300 ></TD | |
| 301 ></TR | |
| 302 ><TR | |
| 303 ><TD | |
| 304 ALIGN="LEFT" | |
| 305 VALIGN="TOP" | |
| 306 ><TT | |
| 307 CLASS="STRUCTFIELD" | |
| 308 ><I | |
|
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309 >expose</I |
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310 ></TT |
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311 ></TD |
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312 ><TD |
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313 ALIGN="LEFT" |
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314 VALIGN="TOP" |
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315 ><A |
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316 HREF="sdlexposeevent.html" |
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317 >Application window expose event</A |
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318 ></TD |
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319 ></TR |
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320 ><TR |
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321 ><TD |
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322 ALIGN="LEFT" |
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323 VALIGN="TOP" |
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324 ><TT |
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325 CLASS="STRUCTFIELD" |
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326 ><I |
| 0 | 327 >quit</I |
| 328 ></TT | |
| 329 ></TD | |
| 330 ><TD | |
| 331 ALIGN="LEFT" | |
| 332 VALIGN="TOP" | |
| 333 ><A | |
| 334 HREF="sdlquitevent.html" | |
| 335 >Application quit request event</A | |
| 336 ></TD | |
| 337 ></TR | |
| 338 ><TR | |
| 339 ><TD | |
| 340 ALIGN="LEFT" | |
| 341 VALIGN="TOP" | |
| 342 ><TT | |
| 343 CLASS="STRUCTFIELD" | |
| 344 ><I | |
| 345 >user</I | |
| 346 ></TT | |
| 347 ></TD | |
| 348 ><TD | |
| 349 ALIGN="LEFT" | |
| 350 VALIGN="TOP" | |
| 351 ><A | |
| 352 HREF="sdluserevent.html" | |
| 353 >User defined event</A | |
| 354 ></TD | |
| 355 ></TR | |
| 356 ><TR | |
| 357 ><TD | |
| 358 ALIGN="LEFT" | |
| 359 VALIGN="TOP" | |
| 360 ><TT | |
| 361 CLASS="STRUCTFIELD" | |
| 362 ><I | |
| 363 >syswm</I | |
| 364 ></TT | |
| 365 ></TD | |
| 366 ><TD | |
| 367 ALIGN="LEFT" | |
| 368 VALIGN="TOP" | |
| 369 ><A | |
| 370 HREF="sdlsyswmevent.html" | |
| 371 >Undefined window manager event</A | |
| 372 ></TD | |
| 373 ></TR | |
| 374 ></TBODY | |
| 375 ></TABLE | |
| 376 ><P | |
| 377 ></P | |
| 378 ></DIV | |
| 379 ></DIV | |
| 380 ><DIV | |
| 381 CLASS="REFSECT1" | |
| 382 ><A | |
|
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383 NAME="AEN3407" |
| 0 | 384 ></A |
| 385 ><H2 | |
| 386 >Description</H2 | |
| 387 ><P | |
| 388 >The <SPAN | |
| 389 CLASS="STRUCTNAME" | |
| 390 >SDL_Event</SPAN | |
| 391 > union is the core to all event handling is SDL, its probably the most important structure after <SPAN | |
| 392 CLASS="STRUCTNAME" | |
| 393 >SDL_Surface</SPAN | |
| 394 >. <SPAN | |
| 395 CLASS="STRUCTNAME" | |
| 396 >SDL_Event</SPAN | |
| 397 > is a union of all event structures used in SDL, using it is a simple matter of knowing which union member relates to which event <TT | |
| 398 CLASS="STRUCTFIELD" | |
| 399 ><I | |
| 400 >type</I | |
| 401 ></TT | |
| 402 >.</P | |
| 403 ><P | |
| 404 ><DIV | |
| 405 CLASS="INFORMALTABLE" | |
| 406 ><A | |
|
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407 NAME="AEN3415" |
| 0 | 408 ></A |
| 409 ><P | |
| 410 ></P | |
| 411 ><TABLE | |
| 412 BORDER="1" | |
| 413 CLASS="CALSTABLE" | |
| 414 ><THEAD | |
| 415 ><TR | |
| 416 ><TH | |
| 417 ALIGN="LEFT" | |
| 418 VALIGN="TOP" | |
| 419 >Event <TT | |
| 420 CLASS="STRUCTFIELD" | |
| 421 ><I | |
| 422 >type</I | |
| 423 ></TT | |
| 424 ></TH | |
| 425 ><TH | |
| 426 ALIGN="LEFT" | |
| 427 VALIGN="TOP" | |
| 428 >Event Structure</TH | |
| 429 ></TR | |
| 430 ></THEAD | |
| 431 ><TBODY | |
| 432 ><TR | |
| 433 ><TD | |
| 434 ALIGN="LEFT" | |
| 435 VALIGN="MIDDLE" | |
| 436 ><TT | |
| 437 CLASS="LITERAL" | |
| 438 >SDL_ACTIVEEVENT</TT | |
| 439 ></TD | |
| 440 ><TD | |
| 441 ALIGN="LEFT" | |
| 442 VALIGN="MIDDLE" | |
| 443 ><A | |
| 444 HREF="sdlactiveevent.html" | |
| 445 ><SPAN | |
| 446 CLASS="STRUCTNAME" | |
| 447 >SDL_ActiveEvent</SPAN | |
| 448 ></A | |
| 449 ></TD | |
| 450 ></TR | |
| 451 ><TR | |
| 452 ><TD | |
| 453 ALIGN="LEFT" | |
| 454 VALIGN="TOP" | |
| 455 ><TT | |
| 456 CLASS="LITERAL" | |
| 457 >SDL_KEYDOWN/UP</TT | |
| 458 ></TD | |
| 459 ><TD | |
| 460 ALIGN="LEFT" | |
| 461 VALIGN="TOP" | |
| 462 ><A | |
| 463 HREF="sdlkeyboardevent.html" | |
| 464 ><SPAN | |
| 465 CLASS="STRUCTNAME" | |
| 466 >SDL_KeyboardEvent</SPAN | |
| 467 ></A | |
| 468 ></TD | |
| 469 ></TR | |
| 470 ><TR | |
| 471 ><TD | |
| 472 ALIGN="LEFT" | |
| 473 VALIGN="TOP" | |
| 474 ><TT | |
| 475 CLASS="LITERAL" | |
| 476 >SDL_MOUSEMOTION</TT | |
| 477 ></TD | |
| 478 ><TD | |
| 479 ALIGN="LEFT" | |
| 480 VALIGN="TOP" | |
| 481 ><A | |
| 482 HREF="sdlmousemotionevent.html" | |
| 483 ><SPAN | |
| 484 CLASS="STRUCTNAME" | |
| 485 >SDL_MouseMotionEvent</SPAN | |
| 486 ></A | |
| 487 ></TD | |
| 488 ></TR | |
| 489 ><TR | |
| 490 ><TD | |
| 491 ALIGN="LEFT" | |
| 492 VALIGN="TOP" | |
| 493 ><TT | |
| 494 CLASS="LITERAL" | |
| 495 >SDL_MOUSEBUTTONDOWN/UP</TT | |
| 496 ></TD | |
| 497 ><TD | |
| 498 ALIGN="LEFT" | |
| 499 VALIGN="TOP" | |
| 500 ><A | |
| 501 HREF="sdlmousebuttonevent.html" | |
| 502 ><SPAN | |
| 503 CLASS="STRUCTNAME" | |
| 504 >SDL_MouseButtonEvent</SPAN | |
| 505 ></A | |
| 506 ></TD | |
| 507 ></TR | |
| 508 ><TR | |
| 509 ><TD | |
| 510 ALIGN="LEFT" | |
| 511 VALIGN="TOP" | |
| 512 ><TT | |
| 513 CLASS="LITERAL" | |
| 514 >SDL_JOYAXISMOTION</TT | |
| 515 ></TD | |
| 516 ><TD | |
| 517 ALIGN="LEFT" | |
| 518 VALIGN="TOP" | |
| 519 ><A | |
| 520 HREF="sdljoyaxisevent.html" | |
| 521 ><SPAN | |
| 522 CLASS="STRUCTNAME" | |
| 523 >SDL_JoyAxisEvent</SPAN | |
| 524 ></A | |
| 525 ></TD | |
| 526 ></TR | |
| 527 ><TR | |
| 528 ><TD | |
| 529 ALIGN="LEFT" | |
| 530 VALIGN="TOP" | |
| 531 ><TT | |
| 532 CLASS="LITERAL" | |
| 533 >SDL_JOYBALLMOTION</TT | |
| 534 ></TD | |
| 535 ><TD | |
| 536 ALIGN="LEFT" | |
| 537 VALIGN="TOP" | |
| 538 ><A | |
| 539 HREF="sdljoyballevent.html" | |
| 540 ><SPAN | |
| 541 CLASS="STRUCTNAME" | |
| 542 >SDL_JoyBallEvent</SPAN | |
| 543 ></A | |
| 544 ></TD | |
| 545 ></TR | |
| 546 ><TR | |
| 547 ><TD | |
| 548 ALIGN="LEFT" | |
| 549 VALIGN="TOP" | |
| 550 ><TT | |
| 551 CLASS="LITERAL" | |
| 552 >SDL_JOYHATMOTION</TT | |
| 553 ></TD | |
| 554 ><TD | |
| 555 ALIGN="LEFT" | |
| 556 VALIGN="TOP" | |
| 557 ><A | |
| 558 HREF="sdljoyhatevent.html" | |
| 559 ><SPAN | |
| 560 CLASS="STRUCTNAME" | |
| 561 >SDL_JoyHatEvent</SPAN | |
| 562 ></A | |
| 563 ></TD | |
| 564 ></TR | |
| 565 ><TR | |
| 566 ><TD | |
| 567 ALIGN="LEFT" | |
| 568 VALIGN="TOP" | |
| 569 ><TT | |
| 570 CLASS="LITERAL" | |
| 571 >SDL_JOYBUTTONDOWN/UP</TT | |
| 572 ></TD | |
| 573 ><TD | |
| 574 ALIGN="LEFT" | |
| 575 VALIGN="TOP" | |
| 576 ><A | |
| 577 HREF="sdljoybuttonevent.html" | |
| 578 ><SPAN | |
| 579 CLASS="STRUCTNAME" | |
| 580 >SDL_JoyButtonEvent</SPAN | |
| 581 ></A | |
| 582 ></TD | |
| 583 ></TR | |
| 584 ><TR | |
| 585 ><TD | |
| 586 ALIGN="LEFT" | |
| 587 VALIGN="TOP" | |
| 588 ><TT | |
| 589 CLASS="LITERAL" | |
| 590 >SDL_QUIT</TT | |
| 591 ></TD | |
| 592 ><TD | |
| 593 ALIGN="LEFT" | |
| 594 VALIGN="TOP" | |
| 595 ><A | |
| 596 HREF="sdlquitevent.html" | |
| 597 ><SPAN | |
| 598 CLASS="STRUCTNAME" | |
| 599 >SDL_QuitEvent</SPAN | |
| 600 ></A | |
| 601 ></TD | |
| 602 ></TR | |
| 603 ><TR | |
| 604 ><TD | |
| 605 ALIGN="LEFT" | |
| 606 VALIGN="TOP" | |
| 607 ><TT | |
| 608 CLASS="LITERAL" | |
| 609 >SDL_SYSWMEVENT</TT | |
| 610 ></TD | |
| 611 ><TD | |
| 612 ALIGN="LEFT" | |
| 613 VALIGN="TOP" | |
| 614 ><A | |
| 615 HREF="sdlsyswmevent.html" | |
| 616 ><SPAN | |
| 617 CLASS="STRUCTNAME" | |
| 618 >SDL_SysWMEvent</SPAN | |
| 619 ></A | |
| 620 ></TD | |
| 621 ></TR | |
| 622 ><TR | |
| 623 ><TD | |
| 624 ALIGN="LEFT" | |
| 625 VALIGN="TOP" | |
| 626 ><TT | |
| 627 CLASS="LITERAL" | |
| 628 >SDL_VIDEORESIZE</TT | |
| 629 ></TD | |
| 630 ><TD | |
| 631 ALIGN="LEFT" | |
| 632 VALIGN="TOP" | |
| 633 ><A | |
| 634 HREF="sdlresizeevent.html" | |
| 635 ><SPAN | |
| 636 CLASS="STRUCTNAME" | |
| 637 >SDL_ResizeEvent</SPAN | |
| 638 ></A | |
| 639 ></TD | |
| 640 ></TR | |
| 641 ><TR | |
| 642 ><TD | |
| 643 ALIGN="LEFT" | |
| 644 VALIGN="TOP" | |
| 645 ><TT | |
| 646 CLASS="LITERAL" | |
|
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647 >SDL_VIDEOEXPOSE</TT |
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648 ></TD |
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649 ><TD |
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650 ALIGN="LEFT" |
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651 VALIGN="TOP" |
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652 ><A |
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653 HREF="sdlexposeevent.html" |
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654 ><SPAN |
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655 CLASS="STRUCTNAME" |
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656 >SDL_ExposeEvent</SPAN |
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657 ></A |
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658 ></TD |
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659 ></TR |
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660 ><TR |
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661 ><TD |
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662 ALIGN="LEFT" |
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663 VALIGN="TOP" |
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664 ><TT |
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665 CLASS="LITERAL" |
| 0 | 666 >SDL_USEREVENT</TT |
| 667 ></TD | |
| 668 ><TD | |
| 669 ALIGN="LEFT" | |
| 670 VALIGN="TOP" | |
| 671 ><A | |
| 672 HREF="sdluserevent.html" | |
| 673 ><SPAN | |
| 674 CLASS="STRUCTNAME" | |
| 675 >SDL_UserEvent</SPAN | |
| 676 ></A | |
| 677 ></TD | |
| 678 ></TR | |
| 679 ></TBODY | |
| 680 ></TABLE | |
| 681 ><P | |
| 682 ></P | |
| 683 ></DIV | |
| 684 ></P | |
| 685 ></DIV | |
| 686 ><DIV | |
| 687 CLASS="REFSECT1" | |
| 688 ><A | |
|
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689 NAME="AEN3501" |
| 0 | 690 ></A |
| 691 ><H2 | |
| 692 >Use</H2 | |
| 693 ><P | |
| 694 >The <SPAN | |
| 695 CLASS="STRUCTNAME" | |
| 696 >SDL_Event</SPAN | |
| 697 > structure has two uses</P | |
| 698 ><P | |
| 699 ></P | |
| 700 ><UL | |
| 701 COMPACT="COMPACT" | |
| 702 ><LI | |
| 703 ><P | |
| 704 >Reading events on the event queue</P | |
| 705 ></LI | |
| 706 ><LI | |
| 707 ><P | |
| 708 >Placing events on the event queue</P | |
| 709 ></LI | |
| 710 ></UL | |
| 711 ><P | |
| 712 >Reading events from the event queue is done with either <A | |
| 713 HREF="sdlpollevent.html" | |
| 714 ><TT | |
| 715 CLASS="FUNCTION" | |
| 716 >SDL_PollEvent</TT | |
| 717 ></A | |
| 718 > or <A | |
| 719 HREF="sdlpeepevents.html" | |
| 720 ><TT | |
| 721 CLASS="FUNCTION" | |
| 722 >SDL_PeepEvents</TT | |
| 723 ></A | |
| 724 >. We'll use <TT | |
| 725 CLASS="FUNCTION" | |
| 726 >SDL_PollEvent</TT | |
| 727 > and step through an example.</P | |
| 728 ><P | |
| 729 >First off, we create an empty <SPAN | |
| 730 CLASS="STRUCTNAME" | |
| 731 >SDL_Event</SPAN | |
| 732 > structure. | |
| 733 <PRE | |
| 734 CLASS="PROGRAMLISTING" | |
| 735 >SDL_Event test_event;</PRE | |
| 736 > | |
| 737 <TT | |
| 738 CLASS="FUNCTION" | |
| 739 >SDL_PollEvent</TT | |
| 740 > removes the next event from the event queue, if there are no events on the queue it returns <SPAN | |
| 741 CLASS="RETURNVALUE" | |
| 742 >0</SPAN | |
| 743 > otherwise it returns <SPAN | |
| 744 CLASS="RETURNVALUE" | |
| 745 >1</SPAN | |
| 746 >. We use a <TT | |
| 747 CLASS="FUNCTION" | |
| 748 >while</TT | |
| 749 > loop to process each event in turn. | |
| 750 <PRE | |
| 751 CLASS="PROGRAMLISTING" | |
| 752 >while(SDL_PollEvent(&test_event)) {</PRE | |
| 753 > | |
| 754 The <TT | |
| 755 CLASS="FUNCTION" | |
| 756 >SDL_PollEvent</TT | |
| 757 > function take a pointer to an <SPAN | |
| 758 CLASS="STRUCTNAME" | |
| 759 >SDL_Event</SPAN | |
| 760 > structure that is to be filled with event information. We know that if <TT | |
| 761 CLASS="FUNCTION" | |
| 762 >SDL_PollEvent</TT | |
| 763 > removes an event from the queue then the event information will be placed in our <SPAN | |
| 764 CLASS="STRUCTNAME" | |
| 765 >test_event</SPAN | |
| 766 > structure, but we also know that the <I | |
| 767 CLASS="EMPHASIS" | |
| 768 >type</I | |
| 769 > of event will be placed in the <TT | |
| 770 CLASS="STRUCTFIELD" | |
| 771 ><I | |
| 772 >type</I | |
| 773 ></TT | |
| 774 > member of <SPAN | |
| 775 CLASS="STRUCTNAME" | |
| 776 >test_event</SPAN | |
| 777 >. So to handle each event <TT | |
| 778 CLASS="STRUCTFIELD" | |
| 779 ><I | |
| 780 >type</I | |
| 781 ></TT | |
| 782 > seperately we use a <TT | |
| 783 CLASS="FUNCTION" | |
| 784 >switch</TT | |
| 785 > statement. | |
| 786 <PRE | |
| 787 CLASS="PROGRAMLISTING" | |
| 788 > switch(test_event.type) {</PRE | |
| 789 > | |
| 790 We need to know what kind of events we're looking for <I | |
| 791 CLASS="EMPHASIS" | |
| 792 >and</I | |
| 793 > the event <TT | |
| 794 CLASS="STRUCTFIELD" | |
| 795 ><I | |
| 796 >type</I | |
| 797 ></TT | |
| 798 >'s of those events. So lets assume we want to detect where the user is moving the mouse pointer within our application. We look through our event types and notice that <TT | |
| 799 CLASS="LITERAL" | |
| 800 >SDL_MOUSEMOTION</TT | |
| 801 > is, more than likely, the event we're looking for. A little <A | |
| 802 HREF="sdlmousemotionevent.html" | |
| 803 >more</A | |
| 804 > research tells use that <TT | |
| 805 CLASS="LITERAL" | |
| 806 >SDL_MOUSEMOTION</TT | |
| 807 > events are handled within the <A | |
| 808 HREF="sdlmousemotionevent.html" | |
| 809 ><SPAN | |
| 810 CLASS="STRUCTNAME" | |
| 811 >SDL_MouseMotionEvent</SPAN | |
| 812 ></A | |
| 813 > structure which is the <TT | |
| 814 CLASS="STRUCTFIELD" | |
| 815 ><I | |
| 816 >motion</I | |
| 817 ></TT | |
| 818 > member of <SPAN | |
| 819 CLASS="STRUCTNAME" | |
| 820 >SDL_Event</SPAN | |
| 821 >. We can check for the <TT | |
| 822 CLASS="LITERAL" | |
| 823 >SDL_MOUSEMOTION</TT | |
| 824 > event <TT | |
| 825 CLASS="STRUCTFIELD" | |
| 826 ><I | |
| 827 >type</I | |
| 828 ></TT | |
| 829 > within our <TT | |
| 830 CLASS="FUNCTION" | |
| 831 >switch</TT | |
| 832 > statement like so: | |
| 833 <PRE | |
| 834 CLASS="PROGRAMLISTING" | |
| 835 > case SDL_MOUSEMOTION:</PRE | |
| 836 > | |
| 837 All we need do now is read the information out of the <TT | |
| 838 CLASS="STRUCTFIELD" | |
| 839 ><I | |
| 840 >motion</I | |
| 841 ></TT | |
| 842 > member of <SPAN | |
| 843 CLASS="STRUCTNAME" | |
| 844 >test_event</SPAN | |
| 845 >. | |
| 846 <PRE | |
| 847 CLASS="PROGRAMLISTING" | |
| 848 > printf("We got a motion event.\n"); | |
| 849 printf("Current mouse position is: (%d, %d)\n", test_event.motion.x, test_event.motion.y); | |
| 850 break; | |
| 851 default: | |
| 852 printf("Unhandled Event!\n"); | |
| 853 break; | |
| 854 } | |
| 855 } | |
| 856 printf("Event queue empty.\n");</PRE | |
| 857 ></P | |
| 858 ><P | |
| 859 >It is also possible to push events onto the event queue and so use it as a two-way communication path. Both <A | |
| 860 HREF="sdlpushevent.html" | |
| 861 ><TT | |
| 862 CLASS="FUNCTION" | |
| 863 >SDL_PushEvent</TT | |
| 864 ></A | |
| 865 > and <A | |
| 866 HREF="sdlpeepevents.html" | |
| 867 ><TT | |
| 868 CLASS="FUNCTION" | |
| 869 >SDL_PeepEvents</TT | |
| 870 ></A | |
| 871 > allow you to place events onto the event queue. This is usually used to place a <TT | |
| 872 CLASS="LITERAL" | |
| 873 >SDL_USEREVENT</TT | |
| 874 > on the event queue, however you could use it to post fake input events if you wished. Creating your own events is a simple matter of choosing the event type you want, setting the <TT | |
| 875 CLASS="STRUCTFIELD" | |
| 876 ><I | |
| 877 >type</I | |
| 878 ></TT | |
| 879 > member and filling the appropriate member structure with information. | |
| 880 <PRE | |
| 881 CLASS="PROGRAMLISTING" | |
| 882 >SDL_Event user_event; | |
| 883 | |
| 884 user_event.type=SDL_USEREVENT; | |
| 885 user_event.user.code=2; | |
| 886 user_event.user.data1=NULL; | |
| 887 user_event.user.data2=NULL; | |
| 888 SDL_PushEvent(&user_event);</PRE | |
| 889 ></P | |
| 890 ></DIV | |
| 891 ><DIV | |
| 892 CLASS="REFSECT1" | |
| 893 ><A | |
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894 NAME="AEN3558" |
| 0 | 895 ></A |
| 896 ><H2 | |
| 897 >See Also</H2 | |
| 898 ><P | |
| 899 ><A | |
| 900 HREF="sdlpollevent.html" | |
| 901 ><TT | |
| 902 CLASS="FUNCTION" | |
| 903 >SDL_PollEvent</TT | |
| 904 ></A | |
| 905 >, | |
| 906 <A | |
| 907 HREF="sdlpushevent.html" | |
| 908 ><TT | |
| 909 CLASS="FUNCTION" | |
| 910 >SDL_PushEvent</TT | |
| 911 ></A | |
| 912 >, | |
| 913 <A | |
| 914 HREF="sdlpeepevents.html" | |
| 915 ><TT | |
| 916 CLASS="FUNCTION" | |
| 917 >SDL_PeepEvents</TT | |
| 918 ></A | |
| 919 ></P | |
| 920 ></DIV | |
| 921 ><DIV | |
| 922 CLASS="NAVFOOTER" | |
| 923 ><HR | |
| 924 ALIGN="LEFT" | |
| 925 WIDTH="100%"><TABLE | |
| 926 WIDTH="100%" | |
| 927 BORDER="0" | |
| 928 CELLPADDING="0" | |
| 929 CELLSPACING="0" | |
| 930 ><TR | |
| 931 ><TD | |
| 932 WIDTH="33%" | |
| 933 ALIGN="left" | |
| 934 VALIGN="top" | |
| 935 ><A | |
| 936 HREF="eventstructures.html" | |
| 937 >Prev</A | |
| 938 ></TD | |
| 939 ><TD | |
| 940 WIDTH="34%" | |
| 941 ALIGN="center" | |
| 942 VALIGN="top" | |
| 943 ><A | |
| 944 HREF="index.html" | |
| 945 >Home</A | |
| 946 ></TD | |
| 947 ><TD | |
| 948 WIDTH="33%" | |
| 949 ALIGN="right" | |
| 950 VALIGN="top" | |
| 951 ><A | |
| 952 HREF="sdlactiveevent.html" | |
| 953 >Next</A | |
| 954 ></TD | |
| 955 ></TR | |
| 956 ><TR | |
| 957 ><TD | |
| 958 WIDTH="33%" | |
| 959 ALIGN="left" | |
| 960 VALIGN="top" | |
| 961 >SDL Event Structures.</TD | |
| 962 ><TD | |
| 963 WIDTH="34%" | |
| 964 ALIGN="center" | |
| 965 VALIGN="top" | |
| 966 ><A | |
| 967 HREF="eventstructures.html" | |
| 968 >Up</A | |
| 969 ></TD | |
| 970 ><TD | |
| 971 WIDTH="33%" | |
| 972 ALIGN="right" | |
| 973 VALIGN="top" | |
| 974 >SDL_ActiveEvent</TD | |
| 975 ></TR | |
| 976 ></TABLE | |
| 977 ></DIV | |
| 978 ></BODY | |
| 979 ></HTML | |
| 980 > |