Tk Source Code

Artifact [e7bfcdb4]
Login
Bounty program for improvements to Tcl and certain Tcl packages.

Artifact e7bfcdb457df896f85e1443323f217e0e097ca201296b718f7ae2c8f451bddbe:


     1
     2
     3
     4
     5
     6
     7
     8
     9
    10
    11
    12
    13
    14
    15
    16
    17
    18
    19
    20
    21
    22
    23
    24
    25
    26
    27
    28
    29
    30
    31
    32
    33
    34
    35
    36
    37
    38
    39
    40
    41
    42
    43
    44
    45
    46
    47
    48
    49
    50
    51
    52
    53
    54
    55
    56
    57
    58
    59
    60
    61
    62
    63
    64
    65
    66
    67
    68
    69
    70
    71
    72
    73
    74
    75
    76
    77
    78
    79
    80
    81
    82
    83
    84
    85
    86
    87
    88
    89
    90
    91
    92
    93
    94
    95
    96
    97
    98
    99
   100
   101
   102
   103
   104
   105
   106
   107
   108
   109
   110
   111
   112
   113
   114
   115
   116
   117
   118
   119
   120
   121
   122
   123
   124
   125
   126
   127
   128
   129
   130
   131
   132
   133
   134
   135
   136
   137
   138
   139
   140
   141
   142
   143
   144
   145
   146
   147
   148
   149
   150
   151
   152
   153
   154
   155
   156
   157
   158
   159
   160
   161
   162
   163
   164
   165
   166
   167
   168
   169
   170
   171
   172
   173
   174
   175
   176
   177
   178
   179
   180
   181
   182
   183
   184
   185
   186
   187
   188
   189
   190
   191
   192
   193
   194
   195
   196
   197
   198
   199
   200
   201
   202
   203
   204
   205
   206
   207
   208
   209
   210
   211
   212
   213
   214
   215
   216
   217
   218
   219
   220
   221
   222
   223
   224
   225
   226
   227
   228
   229
   230
   231
   232
   233
   234
   235
   236
   237
   238
   239
   240
   241
   242
   243
   244
   245
   246
   247
   248
   249
   250
   251
   252
   253
   254
   255
   256
   257
   258
   259
   260
   261
   262
   263
   264
   265
   266
   267
   268
   269
   270
   271
   272
   273
   274
   275
   276
   277
   278
   279
   280
   281
   282
   283
   284
   285
   286
   287
   288
   289
   290
   291
   292
   293
   294
   295
   296
   297
   298
   299
   300
   301
   302
   303
   304
   305
   306
   307
   308
   309
   310
   311
   312
   313
   314
   315
   316
   317
   318
   319
   320
   321
   322
   323
   324
   325
   326
   327
   328
   329
   330
   331
   332
   333
   334
   335
   336
   337
   338
   339
   340
   341
   342
   343
   344
   345
   346
   347
   348
   349
   350
   351
   352
   353
   354
   355
   356
   357
   358
   359
   360
   361
   362
   363
   364
   365
   366
   367
   368
   369
   370
   371
   372
   373
   374
   375
   376
   377
   378
   379
   380
   381
   382
   383
   384
   385
   386
   387
   388
   389
   390
   391
   392
   393
   394
   395
   396
   397
   398
   399
   400
   401
   402
   403
   404
   405
   406
   407
   408
   409
   410
   411
   412
   413
   414
   415
   416
   417
   418
   419
   420
   421
   422
   423
   424
   425
   426
   427
   428
   429
   430
   431
   432
   433
   434
   435
   436
   437
   438
   439
   440
   441
   442
   443
   444
   445
   446
   447
   448
   449
   450
   451
   452
   453
   454
   455
   456
   457
   458
   459
   460
   461
   462
   463
   464
   465
   466
   467
   468
   469
   470
   471
   472
   473
   474
   475
   476
   477
   478
   479
   480
   481
   482
   483
   484
   485
   486
   487
   488
   489
   490
   491
   492
   493
   494
   495
   496
   497
   498
   499
   500
   501
   502
   503
   504
   505
   506
   507
   508
   509
   510
   511
   512
   513
   514
   515
   516
   517
   518
   519
   520
   521
   522
   523
   524
   525
   526
   527
   528
   529
   530
   531
   532
   533
   534
   535
   536
   537
   538
   539
   540
   541
   542
   543
   544
   545
   546
   547
   548
   549
   550
   551
   552
   553
   554
   555
   556
   557
   558
   559
   560
   561
   562
   563
   564
   565
   566
   567
   568
   569
   570
   571
   572
   573
   574
   575
   576
   577
   578
   579
   580
   581
   582
   583
   584
   585
   586
   587
   588
   589
   590
   591
   592
   593
   594
   595
   596
   597
   598
   599
   600
   601
   602
   603
/*
 * tkWinPointer.c --
 *
 *	Windows specific mouse tracking code.
 *
 * Copyright (c) 1995-1997 Sun Microsystems, Inc.
 * Copyright (c) 1998-1999 by Scriptics Corporation.
 *
 * See the file "license.terms" for information on usage and redistribution of
 * this file, and for a DISCLAIMER OF ALL WARRANTIES.
 */

#include "tkWinInt.h"

/*
 * Check for enter/leave events every MOUSE_TIMER_INTERVAL milliseconds.
 */

#define MOUSE_TIMER_INTERVAL 250

/*
 * Declarations of static variables used in this file.
 */

static int captured = 0;		/* 1 if mouse is currently captured. */
static TkWindow *keyboardWinPtr = NULL; /* Current keyboard grab window. */
static Tcl_TimerToken mouseTimer;	/* Handle to the latest mouse timer. */
static int mouseTimerSet = 0;		/* 1 if the mouse timer is active. */

/*
 * Forward declarations of procedures used in this file.
 */

static void		MouseTimerProc(ClientData clientData);

/*
 *----------------------------------------------------------------------
 *
 * TkWinGetModifierState --
 *
 *	Return the modifier state as of the last message.
 *
 * Results:
 *	Returns the X modifier mask.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
TkWinGetModifierState(void)
{
    int state = 0;

    if (GetKeyState(VK_SHIFT) & 0x8000) {
	state |= ShiftMask;
    }
    if (GetKeyState(VK_CONTROL) & 0x8000) {
	state |= ControlMask;
    }
    if (GetKeyState(VK_MENU) & 0x8000) {
	state |= ALT_MASK;
    }
    if (GetKeyState(VK_CAPITAL) & 0x0001) {
	state |= LockMask;
    }
    if (GetKeyState(VK_NUMLOCK) & 0x0001) {
	state |= Mod1Mask;
    }
    if (GetKeyState(VK_SCROLL) & 0x0001) {
	state |= Mod3Mask;
    }
    if (GetKeyState(VK_LBUTTON) & 0x8000) {
	state |= Button1Mask;
    }
    if (GetKeyState(VK_MBUTTON) & 0x8000) {
	state |= Button2Mask;
    }
    if (GetKeyState(VK_RBUTTON) & 0x8000) {
	state |= Button3Mask;
    }
    if (GetKeyState(VK_XBUTTON1) & 0x8000) {
	state |= Button4Mask;
    }
    if (GetKeyState(VK_XBUTTON2) & 0x8000) {
	state |= Button5Mask;
    }
    return state;
}

/*
 *----------------------------------------------------------------------
 *
 * Tk_PointerEvent --
 *
 *	This procedure is called for each pointer-related event. It converts
 *	the position to root coords and updates the global pointer state
 *	machine. It also ensures that the mouse timer is scheduled.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	May queue events and change the grab state.
 *
 *----------------------------------------------------------------------
 */

void
Tk_PointerEvent(
    HWND hwnd,			/* Window for coords, or NULL for the root
				 * window. */
    int x, int y)		/* Coords relative to hwnd, or screen if hwnd
				 * is NULL. */
{
    POINT pos;
    int state;
    Tk_Window tkwin;

    pos.x = x;
    pos.y = y;

    /*
     * Convert client coords to root coords if we were given a window.
     */

    if (hwnd) {
	ClientToScreen(hwnd, &pos);
    }

    /*
     * If the mouse is captured, Windows will report all pointer events to the
     * capture window. So, we need to determine which window the mouse is
     * really over and change the event. Note that the computed hwnd may point
     * to a window not owned by Tk, or a toplevel decorative frame, so tkwin
     * can be NULL.
     */

    if (captured || hwnd == NULL) {
	hwnd = WindowFromPoint(pos);
    }
    tkwin = Tk_HWNDToWindow(hwnd);

    state = TkWinGetModifierState();

    Tk_UpdatePointer(tkwin, pos.x, pos.y, state);

    if ((captured || tkwin) && !mouseTimerSet) {
	mouseTimerSet = 1;
	mouseTimer = Tcl_CreateTimerHandler(MOUSE_TIMER_INTERVAL,
		MouseTimerProc, NULL);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * XGrabKeyboard --
 *
 *	Simulates a keyboard grab by setting the focus.
 *
 * Results:
 *	Always returns GrabSuccess.
 *
 * Side effects:
 *	Sets the keyboard focus to the specified window.
 *
 *----------------------------------------------------------------------
 */

int
XGrabKeyboard(
    Display *display,
    Window grab_window,
    Bool owner_events,
    int pointer_mode,
    int keyboard_mode,
    Time time)
{
    keyboardWinPtr = TkWinGetWinPtr(grab_window);
    return GrabSuccess;
}

/*
 *----------------------------------------------------------------------
 *
 * XUngrabKeyboard --
 *
 *	Releases the simulated keyboard grab.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Sets the keyboard focus back to the value before the grab.
 *
 *----------------------------------------------------------------------
 */

int
XUngrabKeyboard(
    Display *display,
    Time time)
{
    keyboardWinPtr = NULL;
    return Success;
}

/*
 *----------------------------------------------------------------------
 *
 * MouseTimerProc --
 *
 *	Check the current mouse position and look for enter/leave events.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	May schedule a new timer and/or generate enter/leave events.
 *
 *----------------------------------------------------------------------
 */

void
MouseTimerProc(
    ClientData clientData)
{
    POINT pos;

    mouseTimerSet = 0;

    /*
     * Get the current mouse position and window. Don't do anything if the
     * mouse hasn't moved since the last time we looked.
     */

    GetCursorPos(&pos);
    Tk_PointerEvent(NULL, pos.x, pos.y);
}

/*
 *----------------------------------------------------------------------
 *
 * TkWinCancelMouseTimer --
 *
 *    If the mouse timer is set, cancel it.
 *
 * Results:
 *    None.
 *
 * Side effects:
 *    May cancel the mouse timer.
 *
 *----------------------------------------------------------------------
 */

void
TkWinCancelMouseTimer(void)
{
    if (mouseTimerSet) {
	Tcl_DeleteTimerHandler(mouseTimer);
	mouseTimerSet = 0;
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkGetPointerCoords --
 *
 *	Fetch the position of the mouse pointer.
 *
 * Results:
 *	*xPtr and *yPtr are filled in with the root coordinates of the mouse
 *	pointer for the display.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

void
TkGetPointerCoords(
    Tk_Window tkwin,		/* Window that identifies screen on which
				 * lookup is to be done. */
    int *xPtr, int *yPtr)	/* Store pointer coordinates here. */
{
    POINT point;

    GetCursorPos(&point);
    *xPtr = point.x;
    *yPtr = point.y;
}

/*
 *----------------------------------------------------------------------
 *
 * XQueryPointer --
 *
 *	Check the current state of the mouse. This is not a complete
 *	implementation of this function. It only computes the root coordinates
 *	and the current mask.
 *
 * Results:
 *	Sets root_x_return, root_y_return, and mask_return. Returns true on
 *	success.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

Bool
XQueryPointer(
    Display *display,
    Window w,
    Window *root_return,
    Window *child_return,
    int *root_x_return,
    int *root_y_return,
    int *win_x_return,
    int *win_y_return,
    unsigned int *mask_return)
{
    display->request++;
    TkGetPointerCoords(NULL, root_x_return, root_y_return);
    *mask_return = TkWinGetModifierState();
    return True;
}

/*
 *----------------------------------------------------------------------
 *
 * XWarpPointer, TkpWarpPointer --
 *
 *	Move pointer to new location. Note that implementation of XWarpPointer
 *	is incomplete.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Mouse pointer changes position on screen.
 *
 *----------------------------------------------------------------------
 */

/*
 * TkSetCursorPos is a helper function replacing SetCursorPos since this
 * latter Windows function appears to have been broken by Microsoft
 * since Win10 Falls Creator Update - See ticket [69b48f427e] along with
 * several other Internet reports about this breakage.
 */

void TkSetCursorPos(
    int x,
    int y)
{
    INPUT input;
    unsigned xscreen = (GetSystemMetrics(SM_CXSCREEN) - 1);
    unsigned yscreen = (GetSystemMetrics(SM_CYSCREEN) - 1);
printf("x = %d, y = %d\n",x,y);
printf("xscreen = %d, yscreen = %d\n",xscreen,yscreen);

    input.type = INPUT_MOUSE;
    input.mi.dx = (x * 65535 + xscreen/2) / xscreen;
    input.mi.dy = (y * 65535 + yscreen/2) / yscreen;
printf("input.mi.dx = %d, input.mi.dy = %d\n",input.mi.dx,input.mi.dy);
    input.mi.mouseData = 0;
    input.mi.dwFlags = MOUSEEVENTF_ABSOLUTE | MOUSEEVENTF_MOVE;
    input.mi.time = 0;
    input.mi.dwExtraInfo = 0;
    SendInput(1, &input, sizeof(input));
}

int
XWarpPointer(
    Display *display,
    Window src_w,
    Window dest_w,
    int src_x,
    int src_y,
    unsigned int src_width,
    unsigned int src_height,
    int dest_x,
    int dest_y)
{
    RECT r;

    GetWindowRect(Tk_GetHWND(dest_w), &r);
    TkSetCursorPos(r.left+dest_x, r.top+dest_y);
    return Success;
}

void
TkpWarpPointer(
    TkDisplay *dispPtr)
{
    if (dispPtr->warpWindow) {
	RECT r;

	GetWindowRect(Tk_GetHWND(Tk_WindowId(dispPtr->warpWindow)), &r);
	TkSetCursorPos(r.left + dispPtr->warpX, r.top + dispPtr->warpY);
    } else {
	TkSetCursorPos(dispPtr->warpX, dispPtr->warpY);
    }
}

/*
 *----------------------------------------------------------------------
 *
 * XGetInputFocus --
 *
 *	Retrieves the current keyboard focus window.
 *
 * Results:
 *	Returns the current focus window.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

int
XGetInputFocus(
    Display *display,
    Window *focus_return,
    int *revert_to_return)
{
    Tk_Window tkwin = Tk_HWNDToWindow(GetFocus());

    *focus_return = tkwin ? Tk_WindowId(tkwin) : None;
    *revert_to_return = RevertToParent;
    display->request++;
    return Success;
}

/*
 *----------------------------------------------------------------------
 *
 * XSetInputFocus --
 *
 *	Set the current focus window.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Changes the keyboard focus and causes the selected window to
 *	be activated.
 *
 *----------------------------------------------------------------------
 */

int
XSetInputFocus(
    Display *display,
    Window focus,
    int revert_to,
    Time time)
{
    display->request++;
    if (focus != None) {
	SetFocus(Tk_GetHWND(focus));
    }
    return Success;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpChangeFocus --
 *
 *	This procedure is invoked to move the system focus from one window to
 *	another.
 *
 * Results:
 *	The return value is the serial number of the command that changed the
 *	focus. It may be needed by the caller to filter out focus change
 *	events that were queued before the command. If the procedure doesn't
 *	actually change the focus then it returns 0.
 *
 * Side effects:
 *	The official Windows focus window changes; the application's focus
 *	window isn't changed by this procedure.
 *
 *----------------------------------------------------------------------
 */

int
TkpChangeFocus(
    TkWindow *winPtr,		/* Window that is to receive the X focus. */
    int force)			/* Non-zero means claim the focus even if it
				 * didn't originally belong to topLevelPtr's
				 * application. */
{
    TkDisplay *dispPtr = winPtr->dispPtr;
    Window focusWindow;
    int dummy, serial;
    TkWindow *winPtr2;

    if (!force) {
	XGetInputFocus(dispPtr->display, &focusWindow, &dummy);
	winPtr2 = (TkWindow *) Tk_IdToWindow(dispPtr->display, focusWindow);
	if ((winPtr2 == NULL) || (winPtr2->mainPtr != winPtr->mainPtr)) {
	    return 0;
	}
    }

    if (winPtr->window == None) {
	Tcl_Panic("ChangeXFocus got null X window");
    }

    /*
     * Change the foreground window so the focus window is raised to the top
     * of the system stacking order and gets the keyboard focus.
     */

    if (force) {
	TkWinSetForegroundWindow(winPtr);
    }
    XSetInputFocus(dispPtr->display, winPtr->window, RevertToParent,
	    CurrentTime);

    /*
     * Remember the current serial number for the X server and issue a dummy
     * server request. This marks the position at which we changed the focus,
     * so we can distinguish FocusIn and FocusOut events on either side of the
     * mark.
     */

    serial = NextRequest(winPtr->display);
    XNoOp(winPtr->display);
    return serial;
}

/*
 *----------------------------------------------------------------------
 *
 * TkpSetCapture --
 *
 *	This function captures the mouse so that all future events will be
 *	reported to this window, even if the mouse is outside the window. If
 *	the specified window is NULL, then the mouse is released.
 *
 * Results:
 *	None.
 *
 * Side effects:
 *	Sets the capture flag and captures the mouse.
 *
 *----------------------------------------------------------------------
 */

void
TkpSetCapture(
    TkWindow *winPtr)		/* Capture window, or NULL. */
{
    if (winPtr) {
	SetCapture(Tk_GetHWND(Tk_WindowId(winPtr)));
	captured = 1;
    } else {
	captured = 0;
	ReleaseCapture();
    }
}

/*
 *----------------------------------------------------------------------
 *
 * TkpGetCapture --
 *
 *	This function requests which window is capturing the mouse.
 *
 * Results:
 *	The return value is a pointer to the capture window, if there is
 *      one, otherwise it is NULL.
 *
 * Side effects:
 *	None.
 *
 *----------------------------------------------------------------------
 */

Tk_Window
TkpGetCapture(void)
{
    return Tk_HWNDToWindow(GetCapture());
}

/*
 * Local Variables:
 * mode: c
 * c-basic-offset: 4
 * fill-column: 78
 * End:
 */