| 1 |
/* $Header$ */ |
| 2 |
|
| 3 |
/* |
| 4 |
* tkPointer.c -- |
| 5 |
* |
| 6 |
* This file contains functions for emulating the X server |
| 7 |
* pointer and grab state machine. This file is used by the |
| 8 |
* Mac and Windows platforms to generate appropriate enter/leave |
| 9 |
* events, and to update the global grab window information. |
| 10 |
* |
| 11 |
* Copyright (c) 1996 by Sun Microsystems, Inc. |
| 12 |
* |
| 13 |
* See the file "license.terms" for information on usage and redistribution |
| 14 |
* of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
| 15 |
* |
| 16 |
* RCS: @(#) $Id: tkpointer.c,v 1.1.1.1 2001/06/13 05:07:19 dtashley Exp $ |
| 17 |
*/ |
| 18 |
|
| 19 |
#include "tkInt.h" |
| 20 |
|
| 21 |
#ifdef __WIN32__ |
| 22 |
#include "tkWinInt.h" |
| 23 |
#endif |
| 24 |
|
| 25 |
#ifdef MAC_TCL |
| 26 |
#define Cursor XCursor |
| 27 |
#endif |
| 28 |
|
| 29 |
/* |
| 30 |
* Mask that selects any of the state bits corresponding to buttons, |
| 31 |
* plus masks that select individual buttons' bits: |
| 32 |
*/ |
| 33 |
|
| 34 |
#define ALL_BUTTONS \ |
| 35 |
(Button1Mask|Button2Mask|Button3Mask|Button4Mask|Button5Mask) |
| 36 |
static unsigned int buttonMasks[] = { |
| 37 |
Button1Mask, Button2Mask, Button3Mask, Button4Mask, Button5Mask |
| 38 |
}; |
| 39 |
#define ButtonMask(b) (buttonMasks[(b)-Button1]) |
| 40 |
|
| 41 |
typedef struct ThreadSpecificData { |
| 42 |
TkWindow *grabWinPtr; /* Window that defines the top of the |
| 43 |
* grab tree in a global grab. */ |
| 44 |
int lastState; /* Last known state flags. */ |
| 45 |
XPoint lastPos; /* Last reported mouse position. */ |
| 46 |
TkWindow *lastWinPtr; /* Last reported mouse window. */ |
| 47 |
TkWindow *restrictWinPtr; /* Window to which all mouse events |
| 48 |
* will be reported. */ |
| 49 |
TkWindow *cursorWinPtr; /* Window that is currently |
| 50 |
* controlling the global cursor. */ |
| 51 |
} ThreadSpecificData; |
| 52 |
static Tcl_ThreadDataKey dataKey; |
| 53 |
|
| 54 |
/* |
| 55 |
* Forward declarations of procedures used in this file. |
| 56 |
*/ |
| 57 |
|
| 58 |
static int GenerateEnterLeave _ANSI_ARGS_((TkWindow *winPtr, |
| 59 |
int x, int y, int state)); |
| 60 |
static void InitializeEvent _ANSI_ARGS_((XEvent* eventPtr, |
| 61 |
TkWindow *winPtr, int type, int x, int y, |
| 62 |
int state, int detail)); |
| 63 |
static void UpdateCursor _ANSI_ARGS_((TkWindow *winPtr)); |
| 64 |
|
| 65 |
/* |
| 66 |
*---------------------------------------------------------------------- |
| 67 |
* |
| 68 |
* InitializeEvent -- |
| 69 |
* |
| 70 |
* Initializes the common fields for several X events. |
| 71 |
* |
| 72 |
* Results: |
| 73 |
* None. |
| 74 |
* |
| 75 |
* Side effects: |
| 76 |
* Fills in the specified event structure. |
| 77 |
* |
| 78 |
*---------------------------------------------------------------------- |
| 79 |
*/ |
| 80 |
|
| 81 |
static void |
| 82 |
InitializeEvent(eventPtr, winPtr, type, x, y, state, detail) |
| 83 |
XEvent* eventPtr; /* Event structure to initialize. */ |
| 84 |
TkWindow *winPtr; /* Window to make event relative to. */ |
| 85 |
int type; /* Message type. */ |
| 86 |
int x, y; /* Root coords of event. */ |
| 87 |
int state; /* State flags. */ |
| 88 |
int detail; /* Detail value. */ |
| 89 |
{ |
| 90 |
eventPtr->type = type; |
| 91 |
eventPtr->xany.serial = LastKnownRequestProcessed(winPtr->display); |
| 92 |
eventPtr->xany.send_event = False; |
| 93 |
eventPtr->xany.display = winPtr->display; |
| 94 |
|
| 95 |
eventPtr->xcrossing.root = RootWindow(winPtr->display, winPtr->screenNum); |
| 96 |
eventPtr->xcrossing.time = TkpGetMS(); |
| 97 |
eventPtr->xcrossing.x_root = x; |
| 98 |
eventPtr->xcrossing.y_root = y; |
| 99 |
|
| 100 |
switch (type) { |
| 101 |
case EnterNotify: |
| 102 |
case LeaveNotify: |
| 103 |
eventPtr->xcrossing.mode = NotifyNormal; |
| 104 |
eventPtr->xcrossing.state = state; |
| 105 |
eventPtr->xcrossing.detail = detail; |
| 106 |
eventPtr->xcrossing.focus = False; |
| 107 |
break; |
| 108 |
case MotionNotify: |
| 109 |
eventPtr->xmotion.state = state; |
| 110 |
eventPtr->xmotion.is_hint = detail; |
| 111 |
break; |
| 112 |
case ButtonPress: |
| 113 |
case ButtonRelease: |
| 114 |
eventPtr->xbutton.state = state; |
| 115 |
eventPtr->xbutton.button = detail; |
| 116 |
break; |
| 117 |
} |
| 118 |
TkChangeEventWindow(eventPtr, winPtr); |
| 119 |
} |
| 120 |
|
| 121 |
/* |
| 122 |
*---------------------------------------------------------------------- |
| 123 |
* |
| 124 |
* GenerateEnterLeave -- |
| 125 |
* |
| 126 |
* Update the current mouse window and position, and generate |
| 127 |
* any enter/leave events that are needed. |
| 128 |
* |
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* Results: |
| 130 |
* Returns 1 if enter/leave events were generated. |
| 131 |
* |
| 132 |
* Side effects: |
| 133 |
* May insert events into the Tk event queue. |
| 134 |
* |
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*---------------------------------------------------------------------- |
| 136 |
*/ |
| 137 |
|
| 138 |
static int |
| 139 |
GenerateEnterLeave(winPtr, x, y, state) |
| 140 |
TkWindow *winPtr; /* Current Tk window (or NULL). */ |
| 141 |
int x,y; /* Current mouse position in root coords. */ |
| 142 |
int state; /* State flags. */ |
| 143 |
{ |
| 144 |
int crossed = 0; /* 1 if mouse crossed a window boundary */ |
| 145 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
| 146 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
| 147 |
TkWindow *restrictWinPtr = tsdPtr->restrictWinPtr; |
| 148 |
TkWindow *lastWinPtr = tsdPtr->lastWinPtr; |
| 149 |
|
| 150 |
if (winPtr != tsdPtr->lastWinPtr) { |
| 151 |
if (restrictWinPtr) { |
| 152 |
int newPos, oldPos; |
| 153 |
|
| 154 |
newPos = TkPositionInTree(winPtr, restrictWinPtr); |
| 155 |
oldPos = TkPositionInTree(lastWinPtr, restrictWinPtr); |
| 156 |
|
| 157 |
/* |
| 158 |
* Check if the mouse crossed into or out of the restrict |
| 159 |
* window. If so, we need to generate an Enter or Leave event. |
| 160 |
*/ |
| 161 |
|
| 162 |
if ((newPos != oldPos) && ((newPos == TK_GRAB_IN_TREE) |
| 163 |
|| (oldPos == TK_GRAB_IN_TREE))) { |
| 164 |
XEvent event; |
| 165 |
int type, detail; |
| 166 |
|
| 167 |
if (newPos == TK_GRAB_IN_TREE) { |
| 168 |
type = EnterNotify; |
| 169 |
} else { |
| 170 |
type = LeaveNotify; |
| 171 |
} |
| 172 |
if ((oldPos == TK_GRAB_ANCESTOR) |
| 173 |
|| (newPos == TK_GRAB_ANCESTOR)) { |
| 174 |
detail = NotifyAncestor; |
| 175 |
} else { |
| 176 |
detail = NotifyVirtual; |
| 177 |
} |
| 178 |
InitializeEvent(&event, restrictWinPtr, type, x, y, |
| 179 |
state, detail); |
| 180 |
Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL); |
| 181 |
} |
| 182 |
|
| 183 |
} else { |
| 184 |
TkWindow *targetPtr; |
| 185 |
|
| 186 |
if ((lastWinPtr == NULL) |
| 187 |
|| (lastWinPtr->window == None)) { |
| 188 |
targetPtr = winPtr; |
| 189 |
} else { |
| 190 |
targetPtr = lastWinPtr; |
| 191 |
} |
| 192 |
|
| 193 |
if (targetPtr && (targetPtr->window != None)) { |
| 194 |
XEvent event; |
| 195 |
|
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/* |
| 197 |
* Generate appropriate Enter/Leave events. |
| 198 |
*/ |
| 199 |
|
| 200 |
InitializeEvent(&event, targetPtr, LeaveNotify, x, y, state, |
| 201 |
NotifyNormal); |
| 202 |
|
| 203 |
TkInOutEvents(&event, lastWinPtr, winPtr, LeaveNotify, |
| 204 |
EnterNotify, TCL_QUEUE_TAIL); |
| 205 |
crossed = 1; |
| 206 |
} |
| 207 |
} |
| 208 |
tsdPtr->lastWinPtr = winPtr; |
| 209 |
} |
| 210 |
|
| 211 |
return crossed; |
| 212 |
} |
| 213 |
|
| 214 |
/* |
| 215 |
*---------------------------------------------------------------------- |
| 216 |
* |
| 217 |
* Tk_UpdatePointer -- |
| 218 |
* |
| 219 |
* This function updates the pointer state machine given an |
| 220 |
* the current window, position and modifier state. |
| 221 |
* |
| 222 |
* Results: |
| 223 |
* None. |
| 224 |
* |
| 225 |
* Side effects: |
| 226 |
* May queue new events and update the grab state. |
| 227 |
* |
| 228 |
*---------------------------------------------------------------------- |
| 229 |
*/ |
| 230 |
|
| 231 |
void |
| 232 |
Tk_UpdatePointer(tkwin, x, y, state) |
| 233 |
Tk_Window tkwin; /* Window to which pointer event |
| 234 |
* is reported. May be NULL. */ |
| 235 |
int x, y; /* Pointer location in root coords. */ |
| 236 |
int state; /* Modifier state mask. */ |
| 237 |
{ |
| 238 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
| 239 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
| 240 |
TkWindow *winPtr = (TkWindow *)tkwin; |
| 241 |
TkWindow *targetWinPtr; |
| 242 |
XPoint pos; |
| 243 |
XEvent event; |
| 244 |
int changes = (state ^ tsdPtr->lastState) & ALL_BUTTONS; |
| 245 |
int type, b, mask; |
| 246 |
|
| 247 |
pos.x = x; |
| 248 |
pos.y = y; |
| 249 |
|
| 250 |
/* |
| 251 |
* Use the current keyboard state, but the old mouse button |
| 252 |
* state since we haven't generated the button events yet. |
| 253 |
*/ |
| 254 |
|
| 255 |
tsdPtr->lastState = (state & ~ALL_BUTTONS) | (tsdPtr->lastState |
| 256 |
& ALL_BUTTONS); |
| 257 |
|
| 258 |
/* |
| 259 |
* Generate Enter/Leave events. If the pointer has crossed window |
| 260 |
* boundaries, update the current mouse position so we don't generate |
| 261 |
* redundant motion events. |
| 262 |
*/ |
| 263 |
|
| 264 |
if (GenerateEnterLeave(winPtr, x, y, tsdPtr->lastState)) { |
| 265 |
tsdPtr->lastPos = pos; |
| 266 |
} |
| 267 |
|
| 268 |
/* |
| 269 |
* Generate ButtonPress/ButtonRelease events based on the differences |
| 270 |
* between the current button state and the last known button state. |
| 271 |
*/ |
| 272 |
|
| 273 |
for (b = Button1; b <= Button3; b++) { |
| 274 |
mask = ButtonMask(b); |
| 275 |
if (changes & mask) { |
| 276 |
if (state & mask) { |
| 277 |
type = ButtonPress; |
| 278 |
|
| 279 |
/* |
| 280 |
* ButtonPress - Set restrict window if we aren't grabbed, or |
| 281 |
* if this is the first button down. |
| 282 |
*/ |
| 283 |
|
| 284 |
if (!tsdPtr->restrictWinPtr) { |
| 285 |
if (!tsdPtr->grabWinPtr) { |
| 286 |
|
| 287 |
/* |
| 288 |
* Mouse is not grabbed, so set a button grab. |
| 289 |
*/ |
| 290 |
|
| 291 |
tsdPtr->restrictWinPtr = winPtr; |
| 292 |
TkpSetCapture(tsdPtr->restrictWinPtr); |
| 293 |
|
| 294 |
} else if ((tsdPtr->lastState & ALL_BUTTONS) == 0) { |
| 295 |
|
| 296 |
/* |
| 297 |
* Mouse is in a non-button grab, so ensure |
| 298 |
* the button grab is inside the grab tree. |
| 299 |
*/ |
| 300 |
|
| 301 |
if (TkPositionInTree(winPtr, tsdPtr->grabWinPtr) |
| 302 |
== TK_GRAB_IN_TREE) { |
| 303 |
tsdPtr->restrictWinPtr = winPtr; |
| 304 |
} else { |
| 305 |
tsdPtr->restrictWinPtr = tsdPtr->grabWinPtr; |
| 306 |
} |
| 307 |
TkpSetCapture(tsdPtr->restrictWinPtr); |
| 308 |
} |
| 309 |
} |
| 310 |
|
| 311 |
} else { |
| 312 |
type = ButtonRelease; |
| 313 |
|
| 314 |
/* |
| 315 |
* ButtonRelease - Release the mouse capture and clear the |
| 316 |
* restrict window when the last button is released and we |
| 317 |
* aren't in a global grab. |
| 318 |
*/ |
| 319 |
|
| 320 |
if ((tsdPtr->lastState & ALL_BUTTONS) == mask) { |
| 321 |
if (!tsdPtr->grabWinPtr) { |
| 322 |
TkpSetCapture(NULL); |
| 323 |
} |
| 324 |
} |
| 325 |
|
| 326 |
/* |
| 327 |
* If we are releasing a restrict window, then we need |
| 328 |
* to send the button event followed by mouse motion from |
| 329 |
* the restrict window to the current mouse position. |
| 330 |
*/ |
| 331 |
|
| 332 |
if (tsdPtr->restrictWinPtr) { |
| 333 |
InitializeEvent(&event, tsdPtr->restrictWinPtr, type, x, y, |
| 334 |
tsdPtr->lastState, b); |
| 335 |
Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL); |
| 336 |
tsdPtr->lastState &= ~mask; |
| 337 |
tsdPtr->lastWinPtr = tsdPtr->restrictWinPtr; |
| 338 |
tsdPtr->restrictWinPtr = NULL; |
| 339 |
|
| 340 |
GenerateEnterLeave(winPtr, x, y, tsdPtr->lastState); |
| 341 |
tsdPtr->lastPos = pos; |
| 342 |
continue; |
| 343 |
} |
| 344 |
} |
| 345 |
|
| 346 |
/* |
| 347 |
* If a restrict window is set, make sure the pointer event |
| 348 |
* is reported relative to that window. Otherwise, if a |
| 349 |
* global grab is in effect then events outside of windows |
| 350 |
* managed by Tk should be reported to the grab window. |
| 351 |
*/ |
| 352 |
|
| 353 |
if (tsdPtr->restrictWinPtr) { |
| 354 |
targetWinPtr = tsdPtr->restrictWinPtr; |
| 355 |
} else if (tsdPtr->grabWinPtr && !winPtr) { |
| 356 |
targetWinPtr = tsdPtr->grabWinPtr; |
| 357 |
} else { |
| 358 |
targetWinPtr = winPtr; |
| 359 |
} |
| 360 |
|
| 361 |
/* |
| 362 |
* If we still have a target window, send the event. |
| 363 |
*/ |
| 364 |
|
| 365 |
if (winPtr != NULL) { |
| 366 |
InitializeEvent(&event, targetWinPtr, type, x, y, |
| 367 |
tsdPtr->lastState, b); |
| 368 |
Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL); |
| 369 |
} |
| 370 |
|
| 371 |
/* |
| 372 |
* Update the state for the next iteration. |
| 373 |
*/ |
| 374 |
|
| 375 |
tsdPtr->lastState = (type == ButtonPress) |
| 376 |
? (tsdPtr->lastState | mask) : (tsdPtr->lastState & ~mask); |
| 377 |
tsdPtr->lastPos = pos; |
| 378 |
} |
| 379 |
} |
| 380 |
|
| 381 |
/* |
| 382 |
* Make sure the cursor window is up to date. |
| 383 |
*/ |
| 384 |
|
| 385 |
if (tsdPtr->restrictWinPtr) { |
| 386 |
targetWinPtr = tsdPtr->restrictWinPtr; |
| 387 |
} else if (tsdPtr->grabWinPtr) { |
| 388 |
targetWinPtr = (TkPositionInTree(winPtr, tsdPtr->grabWinPtr) |
| 389 |
== TK_GRAB_IN_TREE) ? winPtr : tsdPtr->grabWinPtr; |
| 390 |
} else { |
| 391 |
targetWinPtr = winPtr; |
| 392 |
} |
| 393 |
UpdateCursor(targetWinPtr); |
| 394 |
|
| 395 |
/* |
| 396 |
* If no other events caused the position to be updated, |
| 397 |
* generate a motion event. |
| 398 |
*/ |
| 399 |
|
| 400 |
if (tsdPtr->lastPos.x != pos.x || tsdPtr->lastPos.y != pos.y) { |
| 401 |
if (tsdPtr->restrictWinPtr) { |
| 402 |
targetWinPtr = tsdPtr->restrictWinPtr; |
| 403 |
} else if (tsdPtr->grabWinPtr && !winPtr) { |
| 404 |
targetWinPtr = tsdPtr->grabWinPtr; |
| 405 |
} |
| 406 |
|
| 407 |
if (targetWinPtr != NULL) { |
| 408 |
InitializeEvent(&event, targetWinPtr, MotionNotify, x, y, |
| 409 |
tsdPtr->lastState, NotifyNormal); |
| 410 |
Tk_QueueWindowEvent(&event, TCL_QUEUE_TAIL); |
| 411 |
} |
| 412 |
tsdPtr->lastPos = pos; |
| 413 |
} |
| 414 |
} |
| 415 |
|
| 416 |
/* |
| 417 |
*---------------------------------------------------------------------- |
| 418 |
* |
| 419 |
* XGrabPointer -- |
| 420 |
* |
| 421 |
* Capture the mouse so event are reported outside of toplevels. |
| 422 |
* Note that this is a very limited implementation that only |
| 423 |
* supports GrabModeAsync and owner_events True. |
| 424 |
* |
| 425 |
* Results: |
| 426 |
* Always returns GrabSuccess. |
| 427 |
* |
| 428 |
* Side effects: |
| 429 |
* Turns on mouse capture, sets the global grab pointer, and |
| 430 |
* clears any window restrictions. |
| 431 |
* |
| 432 |
*---------------------------------------------------------------------- |
| 433 |
*/ |
| 434 |
|
| 435 |
int |
| 436 |
XGrabPointer(display, grab_window, owner_events, event_mask, pointer_mode, |
| 437 |
keyboard_mode, confine_to, cursor, time) |
| 438 |
Display* display; |
| 439 |
Window grab_window; |
| 440 |
Bool owner_events; |
| 441 |
unsigned int event_mask; |
| 442 |
int pointer_mode; |
| 443 |
int keyboard_mode; |
| 444 |
Window confine_to; |
| 445 |
Cursor cursor; |
| 446 |
Time time; |
| 447 |
{ |
| 448 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
| 449 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
| 450 |
|
| 451 |
display->request++; |
| 452 |
tsdPtr->grabWinPtr = (TkWindow *) Tk_IdToWindow(display, grab_window); |
| 453 |
tsdPtr->restrictWinPtr = NULL; |
| 454 |
TkpSetCapture(tsdPtr->grabWinPtr); |
| 455 |
if (TkPositionInTree(tsdPtr->lastWinPtr, tsdPtr->grabWinPtr) |
| 456 |
!= TK_GRAB_IN_TREE) { |
| 457 |
UpdateCursor(tsdPtr->grabWinPtr); |
| 458 |
} |
| 459 |
return GrabSuccess; |
| 460 |
} |
| 461 |
|
| 462 |
/* |
| 463 |
*---------------------------------------------------------------------- |
| 464 |
* |
| 465 |
* XUngrabPointer -- |
| 466 |
* |
| 467 |
* Release the current grab. |
| 468 |
* |
| 469 |
* Results: |
| 470 |
* None. |
| 471 |
* |
| 472 |
* Side effects: |
| 473 |
* Releases the mouse capture. |
| 474 |
* |
| 475 |
*---------------------------------------------------------------------- |
| 476 |
*/ |
| 477 |
|
| 478 |
void |
| 479 |
XUngrabPointer(display, time) |
| 480 |
Display* display; |
| 481 |
Time time; |
| 482 |
{ |
| 483 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
| 484 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
| 485 |
|
| 486 |
display->request++; |
| 487 |
tsdPtr->grabWinPtr = NULL; |
| 488 |
tsdPtr->restrictWinPtr = NULL; |
| 489 |
TkpSetCapture(NULL); |
| 490 |
UpdateCursor(tsdPtr->lastWinPtr); |
| 491 |
} |
| 492 |
|
| 493 |
/* |
| 494 |
*---------------------------------------------------------------------- |
| 495 |
* |
| 496 |
* TkPointerDeadWindow -- |
| 497 |
* |
| 498 |
* Clean up pointer module state when a window is destroyed. |
| 499 |
* |
| 500 |
* Results: |
| 501 |
* None. |
| 502 |
* |
| 503 |
* Side effects: |
| 504 |
* May release the current capture window. |
| 505 |
* |
| 506 |
*---------------------------------------------------------------------- |
| 507 |
*/ |
| 508 |
|
| 509 |
void |
| 510 |
TkPointerDeadWindow(winPtr) |
| 511 |
TkWindow *winPtr; |
| 512 |
{ |
| 513 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
| 514 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
| 515 |
|
| 516 |
if (winPtr == tsdPtr->lastWinPtr) { |
| 517 |
tsdPtr->lastWinPtr = NULL; |
| 518 |
} |
| 519 |
if (winPtr == tsdPtr->grabWinPtr) { |
| 520 |
tsdPtr->grabWinPtr = NULL; |
| 521 |
} |
| 522 |
if (winPtr == tsdPtr->restrictWinPtr) { |
| 523 |
tsdPtr->restrictWinPtr = NULL; |
| 524 |
} |
| 525 |
if (!(tsdPtr->restrictWinPtr || tsdPtr->grabWinPtr)) { |
| 526 |
TkpSetCapture(NULL); |
| 527 |
} |
| 528 |
} |
| 529 |
|
| 530 |
/* |
| 531 |
*---------------------------------------------------------------------- |
| 532 |
* |
| 533 |
* UpdateCursor -- |
| 534 |
* |
| 535 |
* Set the windows global cursor to the cursor associated with |
| 536 |
* the given Tk window. |
| 537 |
* |
| 538 |
* Results: |
| 539 |
* None. |
| 540 |
* |
| 541 |
* Side effects: |
| 542 |
* Changes the mouse cursor. |
| 543 |
* |
| 544 |
*---------------------------------------------------------------------- |
| 545 |
*/ |
| 546 |
|
| 547 |
static void |
| 548 |
UpdateCursor(winPtr) |
| 549 |
TkWindow *winPtr; |
| 550 |
{ |
| 551 |
Cursor cursor = None; |
| 552 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
| 553 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
| 554 |
|
| 555 |
/* |
| 556 |
* A window inherits its cursor from its parent if it doesn't |
| 557 |
* have one of its own. Top level windows inherit the default |
| 558 |
* cursor. |
| 559 |
*/ |
| 560 |
|
| 561 |
tsdPtr->cursorWinPtr = winPtr; |
| 562 |
while (winPtr != NULL) { |
| 563 |
if (winPtr->atts.cursor != None) { |
| 564 |
cursor = winPtr->atts.cursor; |
| 565 |
break; |
| 566 |
} else if (winPtr->flags & TK_TOP_LEVEL) { |
| 567 |
break; |
| 568 |
} |
| 569 |
winPtr = winPtr->parentPtr; |
| 570 |
} |
| 571 |
TkpSetCursor((TkpCursor) cursor); |
| 572 |
} |
| 573 |
|
| 574 |
/* |
| 575 |
*---------------------------------------------------------------------- |
| 576 |
* |
| 577 |
* XDefineCursor -- |
| 578 |
* |
| 579 |
* This function is called to update the cursor on a window. |
| 580 |
* Since the mouse might be in the specified window, we need to |
| 581 |
* check the specified window against the current mouse position |
| 582 |
* and grab state. |
| 583 |
* |
| 584 |
* Results: |
| 585 |
* None. |
| 586 |
* |
| 587 |
* Side effects: |
| 588 |
* May update the cursor. |
| 589 |
* |
| 590 |
*---------------------------------------------------------------------- |
| 591 |
*/ |
| 592 |
|
| 593 |
void |
| 594 |
XDefineCursor(display, w, cursor) |
| 595 |
Display* display; |
| 596 |
Window w; |
| 597 |
Cursor cursor; |
| 598 |
{ |
| 599 |
TkWindow *winPtr = (TkWindow *)Tk_IdToWindow(display, w); |
| 600 |
ThreadSpecificData *tsdPtr = (ThreadSpecificData *) |
| 601 |
Tcl_GetThreadData(&dataKey, sizeof(ThreadSpecificData)); |
| 602 |
|
| 603 |
if (tsdPtr->cursorWinPtr == winPtr) { |
| 604 |
UpdateCursor(winPtr); |
| 605 |
} |
| 606 |
display->request++; |
| 607 |
} |
| 608 |
|
| 609 |
/* |
| 610 |
*---------------------------------------------------------------------- |
| 611 |
* |
| 612 |
* TkGenerateActivateEvents -- |
| 613 |
* |
| 614 |
* This function is called by the Mac and Windows window manager |
| 615 |
* routines when a toplevel window is activated or deactivated. |
| 616 |
* Activate/Deactivate events will be sent to every subwindow of |
| 617 |
* the toplevel followed by a FocusIn/FocusOut message. |
| 618 |
* |
| 619 |
* Results: |
| 620 |
* None. |
| 621 |
* |
| 622 |
* Side effects: |
| 623 |
* Generates X events. |
| 624 |
* |
| 625 |
*---------------------------------------------------------------------- |
| 626 |
*/ |
| 627 |
|
| 628 |
void |
| 629 |
TkGenerateActivateEvents(winPtr, active) |
| 630 |
TkWindow *winPtr; /* Toplevel to activate. */ |
| 631 |
int active; /* Non-zero if the window is being |
| 632 |
* activated, else 0.*/ |
| 633 |
{ |
| 634 |
XEvent event; |
| 635 |
|
| 636 |
/* |
| 637 |
* Generate Activate and Deactivate events. This event |
| 638 |
* is sent to every subwindow in a toplevel window. |
| 639 |
*/ |
| 640 |
|
| 641 |
event.xany.serial = winPtr->display->request++; |
| 642 |
event.xany.send_event = False; |
| 643 |
event.xany.display = winPtr->display; |
| 644 |
event.xany.window = winPtr->window; |
| 645 |
|
| 646 |
event.xany.type = active ? ActivateNotify : DeactivateNotify; |
| 647 |
TkQueueEventForAllChildren(winPtr, &event); |
| 648 |
|
| 649 |
} |
| 650 |
|
| 651 |
/* End of tkpointer.c */ |
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