1
2 /*
3 * tkScrollbar.c --
4 *
5 * This module implements a scrollbar widgets for the Tk
6 * toolkit. A scrollbar displays a slider and two arrows;
7 * mouse clicks on features within the scrollbar cause
8 * scrolling commands to be invoked.
9 *
10 * Copyright (c) 1990-1994 The Regents of the University of California.
11 * Copyright (c) 1994-1995 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 * SCCS: @(#) tkScrollbar.c 1.79 96/02/15 18:52:40
17 */
18
19 #include "bltInt.h"
20
21 #ifndef NO_TILESCROLLBAR
22
23 #include "bltTile.h"
24
25 extern Tk_CustomOption bltTileOption;
26
27 #define NORMAL_BG "#d9d9d9"
28 #define ACTIVE_BG "#ececec"
29 #define SELECT_BG "#c3c3c3"
30 #define TROUGH "#c3c3c3"
31 #define INDICATOR "#b03060"
32 #define DISABLED "#a3a3a3"
33
34 /*
35 * Defaults for scrollbars:
36 */
37 #define DEF_SCROLLBAR_ACTIVE_BACKGROUND ACTIVE_BG
38 #define DEF_SCROLLBAR_ACTIVE_BG_MONO RGB_BLACK
39 #define DEF_SCROLLBAR_ACTIVE_RELIEF "raised"
40 #define DEF_SCROLLBAR_BACKGROUND NORMAL_BG
41 #define DEF_SCROLLBAR_BG_MONO RGB_WHITE
42 #define DEF_SCROLLBAR_BORDERWIDTH "2"
43 #define DEF_SCROLLBAR_COMMAND ""
44 #define DEF_SCROLLBAR_CURSOR ""
45 #define DEF_SCROLLBAR_EL_BORDERWIDTH "-1"
46 #define DEF_SCROLLBAR_HIGHLIGHT_BG NORMAL_BG
47 #define DEF_SCROLLBAR_HIGHLIGHT RGB_BLACK
48 #define DEF_SCROLLBAR_HIGHLIGHT_WIDTH "2"
49 #define DEF_SCROLLBAR_JUMP "0"
50 #define DEF_SCROLLBAR_ORIENT "vertical"
51 #define DEF_SCROLLBAR_RELIEF "sunken"
52 #define DEF_SCROLLBAR_REPEAT_DELAY "300"
53 #define DEF_SCROLLBAR_REPEAT_INTERVAL "100"
54 #define DEF_SCROLLBAR_TAKE_FOCUS (char *)NULL
55 #define DEF_SCROLLBAR_TROUGH_COLOR TROUGH
56 #define DEF_SCROLLBAR_TROUGH_MONO RGB_WHITE
57 #define DEF_SCROLLBAR_WIDTH "15"
58
59
60 /*
61 * A data structure of the following type is kept for each scrollbar
62 * widget managed by this file:
63 */
64
65 typedef struct {
66 Tk_Window tkwin; /* Window that embodies the scrollbar. NULL
67 * means that the window has been destroyed
68 * but the data structures haven't yet been
69 * cleaned up.*/
70 Display *display; /* Display containing widget. Used, among
71 * other things, so that resources can be
72 * freed even after tkwin has gone away. */
73 Tcl_Interp *interp; /* Interpreter associated with scrollbar. */
74 Tcl_Command widgetCmd; /* Token for scrollbar's widget command. */
75 Tk_Uid orientUid; /* Orientation for window ("vertical" or
76 * "horizontal"). */
77 int vertical; /* Non-zero means vertical orientation
78 * requested, zero means horizontal. */
79 int width; /* Desired narrow dimension of scrollbar,
80 * in pixels. */
81 char *command; /* Command prefix to use when invoking
82 * scrolling commands. NULL means don't
83 * invoke commands. Malloc'ed. */
84 int commandSize; /* Number of non-NULL bytes in command. */
85 int repeatDelay; /* How long to wait before auto-repeating
86 * on scrolling actions (in ms). */
87 int repeatInterval; /* Interval between autorepeats (in ms). */
88 int jump; /* Value of -jump option. */
89
90 /*
91 * Information used when displaying widget:
92 */
93
94 int borderWidth; /* Width of 3-D borders. */
95 Tk_3DBorder bgBorder; /* Used for drawing background (all flat
96 * surfaces except for trough). */
97 Tk_3DBorder activeBorder; /* For drawing backgrounds when active (i.e.
98 * when mouse is positioned over element). */
99 XColor *troughColorPtr; /* Color for drawing trough. */
100 GC troughGC; /* For drawing trough. */
101 GC copyGC; /* Used for copying from pixmap onto screen. */
102 int relief; /* Indicates whether window as a whole is
103 * raised, sunken, or flat. */
104 int highlightWidth; /* Width in pixels of highlight to draw
105 * around widget when it has the focus.
106 * <= 0 means don't draw a highlight. */
107 XColor *highlightBgColorPtr;
108 /* Color for drawing traversal highlight
109 * area when highlight is off. */
110 XColor *highlightColorPtr; /* Color for drawing traversal highlight. */
111 int inset; /* Total width of all borders, including
112 * traversal highlight and 3-D border.
113 * Indicates how much interior stuff must
114 * be offset from outside edges to leave
115 * room for borders. */
116 int elementBorderWidth; /* Width of border to draw around elements
117 * inside scrollbar (arrows and slider).
118 * -1 means use borderWidth. */
119 int arrowLength; /* Length of arrows along long dimension of
120 * scrollbar, including space for a small gap
121 * between the arrow and the slider.
122 * Recomputed on window size changes. */
123 int sliderFirst; /* Pixel coordinate of top or left edge
124 * of slider area, including border. */
125 int sliderLast; /* Coordinate of pixel just after bottom
126 * or right edge of slider area, including
127 * border. */
128 int activeField; /* Names field to be displayed in active
129 * colors, such as TOP_ARROW, or 0 for
130 * no field. */
131 int activeRelief; /* Value of -activeRelief option: relief
132 * to use for active element. */
133
134 /*
135 * Information describing the application related to the scrollbar.
136 * This information is provided by the application by invoking the
137 * "set" widget command. This information can now be provided in
138 * two ways: the "old" form (totalUnits, windowUnits, firstUnit,
139 * and lastUnit), or the "new" form (firstFraction and lastFraction).
140 * FirstFraction and lastFraction will always be valid, but
141 * the old-style information is only valid if the NEW_STYLE_COMMANDS
142 * flag is 0.
143 */
144
145 int totalUnits; /* Total dimension of application, in
146 * units. Valid only if the NEW_STYLE_COMMANDS
147 * flag isn't set. */
148 int windowUnits; /* Maximum number of units that can be
149 * displayed in the window at once. Valid
150 * only if the NEW_STYLE_COMMANDS flag isn't
151 * set. */
152 int firstUnit; /* Number of last unit visible in
153 * application's window. Valid only if the
154 * NEW_STYLE_COMMANDS flag isn't set. */
155 int lastUnit; /* Index of last unit visible in window.
156 * Valid only if the NEW_STYLE_COMMANDS
157 * flag isn't set. */
158 double firstFraction; /* Position of first visible thing in window,
159 * specified as a fraction between 0 and
160 * 1.0. */
161 double lastFraction; /* Position of last visible thing in window,
162 * specified as a fraction between 0 and
163 * 1.0. */
164
165 /*
166 * Miscellaneous information:
167 */
168
169 Tk_Cursor cursor; /* Current cursor for window, or None. */
170 char *takeFocus; /* Value of -takefocus option; not used in
171 * the C code, but used by keyboard traversal
172 * scripts. Malloc'ed, but may be NULL. */
173 int flags; /* Various flags; see below for
174 * definitions. */
175 Blt_Tile tile, tile2, activeTile;
176 char *imagePtr;
177 Tk_Image image;
178 } Scrollbar;
179
180 /*
181 * Legal values for "activeField" field of Scrollbar structures. These
182 * are also the return values from the ScrollbarPosition procedure.
183 */
184
185 #define OUTSIDE 0
186 #define TOP_ARROW 1
187 #define TOP_GAP 2
188 #define SLIDER 3
189 #define BOTTOM_GAP 4
190 #define BOTTOM_ARROW 5
191
192 /*
193 * Flag bits for scrollbars:
194 *
195 * REDRAW_PENDING: Non-zero means a DoWhenIdle handler
196 * has already been queued to redraw
197 * this window.
198 * NEW_STYLE_COMMANDS: Non-zero means the new style of commands
199 * should be used to communicate with the
200 * widget: ".t yview scroll 2 lines", instead
201 * of ".t yview 40", for example.
202 * GOT_FOCUS: Non-zero means this window has the input
203 * focus.
204 */
205
206 #define REDRAW_PENDING 1
207 #define NEW_STYLE_COMMANDS 2
208 #define GOT_FOCUS 4
209 #define SCROLLBAR_LAYOUT 8
210
211 /*
212 * Minimum slider length, in pixels (designed to make sure that the slider
213 * is always easy to grab with the mouse).
214 */
215
216 #define MIN_SLIDER_LENGTH 8
217
218 /*
219 * Information used for argv parsing.
220 */
221
222 static Tk_ConfigSpec configSpecs[] =
223 {
224 {TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
225 DEF_SCROLLBAR_ACTIVE_BACKGROUND, Tk_Offset(Scrollbar, activeBorder),
226 TK_CONFIG_COLOR_ONLY},
227 {TK_CONFIG_BORDER, "-activebackground", "activeBackground", "Foreground",
228 DEF_SCROLLBAR_ACTIVE_BG_MONO, Tk_Offset(Scrollbar, activeBorder),
229 TK_CONFIG_MONO_ONLY},
230 {TK_CONFIG_RELIEF, "-activerelief", "activeRelief", "Relief",
231 DEF_SCROLLBAR_ACTIVE_RELIEF, Tk_Offset(Scrollbar, activeRelief), 0},
232 {TK_CONFIG_CUSTOM, "-activetile", "activeTile", "Tile",
233 (char *)NULL, Tk_Offset(Scrollbar, activeTile), TK_CONFIG_NULL_OK,
234 &bltTileOption},
235 {TK_CONFIG_BORDER, "-background", "background", "Background",
236 DEF_SCROLLBAR_BACKGROUND, Tk_Offset(Scrollbar, bgBorder),
237 TK_CONFIG_COLOR_ONLY},
238 {TK_CONFIG_BORDER, "-background", "background", "Background",
239 DEF_SCROLLBAR_BG_MONO, Tk_Offset(Scrollbar, bgBorder),
240 TK_CONFIG_MONO_ONLY},
241 {TK_CONFIG_SYNONYM, "-bd", "borderWidth", (char *)NULL,
242 (char *)NULL, 0, 0},
243 {TK_CONFIG_SYNONYM, "-bg", "background", (char *)NULL,
244 (char *)NULL, 0, 0},
245 {TK_CONFIG_PIXELS, "-borderwidth", "borderWidth", "BorderWidth",
246 DEF_SCROLLBAR_BORDERWIDTH, Tk_Offset(Scrollbar, borderWidth), 0},
247 {TK_CONFIG_STRING, "-command", "command", "Command",
248 DEF_SCROLLBAR_COMMAND, Tk_Offset(Scrollbar, command),
249 TK_CONFIG_NULL_OK},
250 {TK_CONFIG_ACTIVE_CURSOR, "-cursor", "cursor", "Cursor",
251 DEF_SCROLLBAR_CURSOR, Tk_Offset(Scrollbar, cursor), TK_CONFIG_NULL_OK},
252 {TK_CONFIG_PIXELS, "-elementborderwidth", "elementBorderWidth",
253 "BorderWidth", DEF_SCROLLBAR_EL_BORDERWIDTH,
254 Tk_Offset(Scrollbar, elementBorderWidth), 0},
255 {TK_CONFIG_COLOR, "-highlightbackground", "highlightBackground",
256 "HighlightBackground", DEF_SCROLLBAR_HIGHLIGHT_BG,
257 Tk_Offset(Scrollbar, highlightBgColorPtr), 0},
258 {TK_CONFIG_COLOR, "-highlightcolor", "highlightColor", "HighlightColor",
259 DEF_SCROLLBAR_HIGHLIGHT,
260 Tk_Offset(Scrollbar, highlightColorPtr), 0},
261 {TK_CONFIG_PIXELS, "-highlightthickness", "highlightThickness",
262 "HighlightThickness",
263 DEF_SCROLLBAR_HIGHLIGHT_WIDTH, Tk_Offset(Scrollbar, highlightWidth), 0},
264 {TK_CONFIG_STRING, "-image", "image", "Image",
265 NULL, Tk_Offset(Scrollbar, imagePtr), 0},
266 {TK_CONFIG_BOOLEAN, "-jump", "jump", "Jump",
267 DEF_SCROLLBAR_JUMP, Tk_Offset(Scrollbar, jump), 0},
268 {TK_CONFIG_UID, "-orient", "orient", "Orient",
269 DEF_SCROLLBAR_ORIENT, Tk_Offset(Scrollbar, orientUid), 0},
270 {TK_CONFIG_RELIEF, "-relief", "relief", "Relief",
271 DEF_SCROLLBAR_RELIEF, Tk_Offset(Scrollbar, relief), 0},
272 {TK_CONFIG_INT, "-repeatdelay", "repeatDelay", "RepeatDelay",
273 DEF_SCROLLBAR_REPEAT_DELAY, Tk_Offset(Scrollbar, repeatDelay), 0},
274 {TK_CONFIG_INT, "-repeatinterval", "repeatInterval", "RepeatInterval",
275 DEF_SCROLLBAR_REPEAT_INTERVAL, Tk_Offset(Scrollbar, repeatInterval), 0},
276 {TK_CONFIG_STRING, "-takefocus", "takeFocus", "TakeFocus",
277 DEF_SCROLLBAR_TAKE_FOCUS, Tk_Offset(Scrollbar, takeFocus),
278 TK_CONFIG_NULL_OK},
279 {TK_CONFIG_CUSTOM, "-tile", "tile", "Tile",
280 (char *)NULL, Tk_Offset(Scrollbar, tile), TK_CONFIG_NULL_OK,
281 &bltTileOption},
282 {TK_CONFIG_CUSTOM, "-tile2", "tile2", "Tile2",
283 (char *)NULL, Tk_Offset(Scrollbar, tile2), TK_CONFIG_NULL_OK,
284 &bltTileOption},
285 {TK_CONFIG_COLOR, "-troughcolor", "troughColor", "Background",
286 DEF_SCROLLBAR_TROUGH_COLOR, Tk_Offset(Scrollbar, troughColorPtr),
287 TK_CONFIG_COLOR_ONLY},
288 {TK_CONFIG_COLOR, "-troughcolor", "troughColor", "Background",
289 DEF_SCROLLBAR_TROUGH_MONO, Tk_Offset(Scrollbar, troughColorPtr),
290 TK_CONFIG_MONO_ONLY},
291 {TK_CONFIG_PIXELS, "-width", "width", "Width",
292 DEF_SCROLLBAR_WIDTH, Tk_Offset(Scrollbar, width), 0},
293 {TK_CONFIG_END, (char *)NULL, (char *)NULL, (char *)NULL,
294 (char *)NULL, 0, 0}
295 };
296
297 /*
298 * Forward declarations for procedures defined later in this file:
299 */
300
301 static void ComputeScrollbarGeometry _ANSI_ARGS_((
302 Scrollbar *scrollPtr));
303 static int ConfigureScrollbar _ANSI_ARGS_((Tcl_Interp *interp,
304 Scrollbar *scrollPtr, int argc, char **argv,
305 int flags));
306 static void DestroyScrollbar _ANSI_ARGS_((DestroyData *memPtr));
307 static void DisplayScrollbar _ANSI_ARGS_((ClientData clientData));
308 static void EventuallyRedraw _ANSI_ARGS_((Scrollbar *scrollPtr));
309 static void ScrollbarCmdDeletedProc _ANSI_ARGS_((
310 ClientData clientData));
311 static void ScrollbarEventProc _ANSI_ARGS_((ClientData clientData,
312 XEvent *eventPtr));
313 static int ScrollbarPosition _ANSI_ARGS_((Scrollbar *scrollPtr,
314 int x, int y));
315 static int ScrollbarWidgetCmd _ANSI_ARGS_((ClientData clientData,
316 Tcl_Interp *, int argc, char **argv));
317
318 static void widgetWorldChanged(ClientData clientData);
319
320 static Tk_ClassProcs scrollClass = {
321 sizeof(Tk_ClassProcs), /* size */
322 widgetWorldChanged, /* worldChangedProc */
323 };
324
325
326 static void
widgetWorldChanged(ClientData clientData)327 widgetWorldChanged(ClientData clientData)
328 {
329 Scrollbar *scrollPtr = (Scrollbar *)clientData;
330 scrollPtr->flags |= (SCROLLBAR_LAYOUT);
331
332 EventuallyRedraw(scrollPtr);
333 }
334
335
336 /*
337 *--------------------------------------------------------------
338 *
339 * ScrollbarCmd --
340 *
341 * This procedure is invoked to process the "scrollbar" Tcl
342 * command. See the user documentation for details on what
343 * it does.
344 *
345 * Results:
346 * A standard Tcl result.
347 *
348 * Side effects:
349 * See the user documentation.
350 *
351 *--------------------------------------------------------------
352 */
353
354 /*ARGSUSED*/
355 static int
scrollbarCmd(clientData,interp,argc,argv,stype)356 scrollbarCmd(clientData, interp, argc, argv, stype)
357 ClientData clientData; /* Main window associated with
358 * interpreter. */
359 Tcl_Interp *interp; /* Current interpreter. */
360 int argc; /* Number of arguments. */
361 char **argv; /* Argument strings. */
362 int stype;
363 {
364 register Scrollbar *scrollPtr;
365 Tk_Window tkwin;
366
367 if (argc < 2) {
368 Tcl_AppendResult(interp, "wrong # args: should be \"",
369 argv[0], " pathName ?options?\"", (char *)NULL);
370 return TCL_ERROR;
371 }
372 tkwin = Tk_CreateWindowFromPath(interp, Tk_MainWindow(interp), argv[1],
373 (char *)NULL);
374 if (tkwin == NULL) {
375 return TCL_ERROR;
376 }
377 /*
378 * Initialize fields that won't be initialized by ConfigureScrollbar,
379 * or which ConfigureScrollbar expects to have reasonable values
380 * (e.g. resource pointers).
381 */
382
383 scrollPtr = Blt_Calloc(1, sizeof(Scrollbar));
384 scrollPtr->tkwin = tkwin;
385 scrollPtr->display = Tk_Display(tkwin);
386 scrollPtr->interp = interp;
387 scrollPtr->widgetCmd = Tcl_CreateCommand(interp,
388 Tk_PathName(scrollPtr->tkwin), ScrollbarWidgetCmd,
389 (ClientData)scrollPtr, ScrollbarCmdDeletedProc);
390 #ifdef ITCL_NAMESPACES
391 Itk_SetWidgetCommand(scrollPtr->tkwin, scrollPtr->widgetCmd);
392 #endif /* ITCL_NAMESPACES */
393 scrollPtr->orientUid = NULL;
394 scrollPtr->vertical = 0;
395 scrollPtr->width = 0;
396 scrollPtr->command = NULL;
397 scrollPtr->commandSize = 0;
398 scrollPtr->repeatDelay = 0;
399 scrollPtr->repeatInterval = 0;
400 scrollPtr->borderWidth = 0;
401 scrollPtr->bgBorder = NULL;
402 scrollPtr->activeBorder = NULL;
403 scrollPtr->troughColorPtr = NULL;
404 scrollPtr->troughGC = None;
405 scrollPtr->copyGC = None;
406 scrollPtr->relief = TK_RELIEF_FLAT;
407 scrollPtr->highlightWidth = 0;
408 scrollPtr->highlightBgColorPtr = NULL;
409 scrollPtr->highlightColorPtr = NULL;
410 scrollPtr->inset = 0;
411 scrollPtr->elementBorderWidth = -1;
412 scrollPtr->arrowLength = 0;
413 scrollPtr->sliderFirst = 0;
414 scrollPtr->sliderLast = 0;
415 scrollPtr->activeField = 0;
416 scrollPtr->activeRelief = TK_RELIEF_RAISED;
417 scrollPtr->totalUnits = 0;
418 scrollPtr->windowUnits = 0;
419 scrollPtr->firstUnit = 0;
420 scrollPtr->lastUnit = 0;
421 scrollPtr->firstFraction = 0.0;
422 scrollPtr->lastFraction = 0.0;
423 scrollPtr->cursor = None;
424 scrollPtr->takeFocus = NULL;
425 scrollPtr->flags = 0;
426 scrollPtr->tile = scrollPtr->tile2 = scrollPtr->activeTile = NULL;
427
428 if (stype) {
429 Tk_SetClass(scrollPtr->tkwin, "BScrollbar");
430 } else {
431 Tk_SetClass(scrollPtr->tkwin, "Scrollbar");
432 }
433 Tk_SetClassProcs(tkwin, &scrollClass, (ClientData)scrollPtr);
434 Tk_CreateEventHandler(scrollPtr->tkwin,
435 ExposureMask | StructureNotifyMask | FocusChangeMask,
436 ScrollbarEventProc, (ClientData)scrollPtr);
437 if (ConfigureScrollbar(interp, scrollPtr, argc - 2, argv + 2, 0) != TCL_OK) {
438 goto error;
439 }
440 Tcl_SetResult(interp, Tk_PathName(scrollPtr->tkwin), TCL_VOLATILE);
441 return TCL_OK;
442
443 error:
444 Tk_DestroyWindow(scrollPtr->tkwin);
445 return TCL_ERROR;
446 }
447
448 static int
BScrollbarCmd(clientData,interp,argc,argv)449 BScrollbarCmd(clientData, interp, argc, argv)
450 ClientData clientData; /* Main window associated with
451 * interpreter. */
452 Tcl_Interp *interp; /* Current interpreter. */
453 int argc; /* Number of arguments. */
454 char **argv; /* Argument strings. */
455 {
456 return scrollbarCmd(clientData, interp, argc, argv, 1);
457 }
458
459 static int
ScrollbarCmd(clientData,interp,argc,argv)460 ScrollbarCmd(clientData, interp, argc, argv)
461 ClientData clientData; /* Main window associated with
462 * interpreter. */
463 Tcl_Interp *interp; /* Current interpreter. */
464 int argc; /* Number of arguments. */
465 char **argv; /* Argument strings. */
466 {
467 return scrollbarCmd(clientData, interp, argc, argv, 0);
468 }
469
470 /*
471 *--------------------------------------------------------------
472 *
473 * ScrollbarWidgetCmd --
474 *
475 * This procedure is invoked to process the Tcl command
476 * that corresponds to a widget managed by this module.
477 * See the user documentation for details on what it does.
478 *
479 * Results:
480 * A standard Tcl result.
481 *
482 * Side effects:
483 * See the user documentation.
484 *
485 *--------------------------------------------------------------
486 */
487
488 static int
ScrollbarWidgetCmd(clientData,interp,argc,argv)489 ScrollbarWidgetCmd(clientData, interp, argc, argv)
490 ClientData clientData; /* Information about scrollbar
491 * widget. */
492 Tcl_Interp *interp; /* Current interpreter. */
493 int argc; /* Number of arguments. */
494 char **argv; /* Argument strings. */
495 {
496 register Scrollbar *scrollPtr = clientData;
497 char string[200];
498 int result = TCL_OK;
499 size_t length;
500 int c;
501
502 if (argc < 2) {
503 Tcl_AppendResult(interp, "wrong # args: should be \"",
504 argv[0], " option ?arg arg ...?\"", (char *)NULL);
505 return TCL_ERROR;
506 }
507 Tcl_Preserve((ClientData)scrollPtr);
508 c = argv[1][0];
509 length = strlen(argv[1]);
510 if ((c == 'a') && (strncmp(argv[1], "activate", length) == 0)) {
511 if (argc == 2) {
512 switch (scrollPtr->activeField) {
513 case TOP_ARROW:
514 Tcl_SetResult(interp, "arrow1", TCL_STATIC);
515 break;
516 case SLIDER:
517 Tcl_SetResult(interp, "slider", TCL_STATIC);
518 break;
519 case BOTTOM_ARROW:
520 Tcl_SetResult(interp, "arrow2", TCL_STATIC);
521 break;
522 }
523 goto done;
524 }
525 if (argc != 3) {
526 Tcl_AppendResult(interp, "wrong # args: should be \"",
527 argv[0], " activate element\"", (char *)NULL);
528 goto error;
529 }
530 c = argv[2][0];
531 length = strlen(argv[2]);
532 if ((c == 'a') && (strcmp(argv[2], "arrow1") == 0)) {
533 scrollPtr->activeField = TOP_ARROW;
534 } else if ((c == 'a') && (strcmp(argv[2], "arrow2") == 0)) {
535 scrollPtr->activeField = BOTTOM_ARROW;
536 } else if ((c == 's') && (strncmp(argv[2], "slider", length) == 0)) {
537 scrollPtr->activeField = SLIDER;
538 } else {
539 scrollPtr->activeField = OUTSIDE;
540 }
541 EventuallyRedraw(scrollPtr);
542 } else if ((c == 'c') && (strncmp(argv[1], "cget", length) == 0)
543 && (length >= 2)) {
544 if (argc != 3) {
545 Tcl_AppendResult(interp, "wrong # args: should be \"",
546 argv[0], " cget option\"",
547 (char *)NULL);
548 goto error;
549 }
550 result = Tk_ConfigureValue(interp, scrollPtr->tkwin, configSpecs,
551 (char *)scrollPtr, argv[2], 0);
552 } else if ((c == 'c') && (strncmp(argv[1], "configure", length) == 0)
553 && (length >= 2)) {
554 if (argc == 2) {
555 result = Tk_ConfigureInfo(interp, scrollPtr->tkwin, configSpecs,
556 (char *)scrollPtr, (char *)NULL, 0);
557 } else if (argc == 3) {
558 result = Tk_ConfigureInfo(interp, scrollPtr->tkwin, configSpecs,
559 (char *)scrollPtr, argv[2], 0);
560 } else {
561 result = ConfigureScrollbar(interp, scrollPtr, argc - 2, argv + 2,
562 TK_CONFIG_ARGV_ONLY);
563 }
564 } else if ((c == 'd') && (strncmp(argv[1], "delta", length) == 0)) {
565 int xDelta, yDelta, pixels, barWidth;
566 double fraction;
567
568 if (argc != 4) {
569 Tcl_AppendResult(interp, "wrong # args: should be \"",
570 argv[0], " delta xDelta yDelta\"", (char *)NULL);
571 goto error;
572 }
573 if ((Tcl_GetInt(interp, argv[2], &xDelta) != TCL_OK)
574 || (Tcl_GetInt(interp, argv[3], &yDelta) != TCL_OK)) {
575 goto error;
576 }
577 if (scrollPtr->vertical) {
578 pixels = yDelta;
579 barWidth = Tk_Height(scrollPtr->tkwin) - 1
580 - 2 * (scrollPtr->arrowLength + scrollPtr->inset);
581 } else {
582 pixels = xDelta;
583 barWidth = Tk_Width(scrollPtr->tkwin) - 1
584 - 2 * (scrollPtr->arrowLength + scrollPtr->inset);
585 }
586 if (barWidth == 0) {
587 fraction = 0.0;
588 } else {
589 fraction = ((double)pixels / (double)barWidth);
590 }
591 Tcl_SetObjResult(interp, Tcl_NewDoubleObj(fraction));
592 } else if ((c == 'f') && (strncmp(argv[1], "fraction", length) == 0)) {
593 int x, y, pos, barWidth;
594 double fraction;
595
596 if (argc != 4) {
597 Tcl_AppendResult(interp, "wrong # args: should be \"",
598 argv[0], " fraction x y\"", (char *)NULL);
599 goto error;
600 }
601 if ((Tcl_GetInt(interp, argv[2], &x) != TCL_OK)
602 || (Tcl_GetInt(interp, argv[3], &y) != TCL_OK)) {
603 goto error;
604 }
605 if (scrollPtr->vertical) {
606 pos = y - (scrollPtr->arrowLength + scrollPtr->inset);
607 barWidth = Tk_Height(scrollPtr->tkwin) - 1
608 - 2 * (scrollPtr->arrowLength + scrollPtr->inset);
609 } else {
610 pos = x - (scrollPtr->arrowLength + scrollPtr->inset);
611 barWidth = Tk_Width(scrollPtr->tkwin) - 1
612 - 2 * (scrollPtr->arrowLength + scrollPtr->inset);
613 }
614 if (barWidth == 0) {
615 fraction = 0.0;
616 } else {
617 fraction = ((double)pos / (double)barWidth);
618 }
619 if (fraction < 0) {
620 fraction = 0;
621 } else if (fraction > 1.0) {
622 fraction = 1.0;
623 }
624 sprintf(string, "%g", fraction);
625 Tcl_SetResult(interp, string, TCL_VOLATILE);
626 } else if ((c == 'g') && (strncmp(argv[1], "get", length) == 0)) {
627 if (argc != 2) {
628 Tcl_AppendResult(interp, "wrong # args: should be \"",
629 argv[0], " get\"", (char *)NULL);
630 goto error;
631 }
632 if (scrollPtr->flags & NEW_STYLE_COMMANDS) {
633 char first[TCL_DOUBLE_SPACE], last[TCL_DOUBLE_SPACE];
634
635 Tcl_PrintDouble(interp, scrollPtr->firstFraction, first);
636 Tcl_PrintDouble(interp, scrollPtr->lastFraction, last);
637 Tcl_AppendResult(interp, first, " ", last, (char *)NULL);
638 } else {
639 sprintf(string, "%d %d %d %d", scrollPtr->totalUnits,
640 scrollPtr->windowUnits, scrollPtr->firstUnit,
641 scrollPtr->lastUnit);
642 Tcl_SetResult(interp, string, TCL_VOLATILE);
643 }
644 } else if ((c == 'i') && (strncmp(argv[1], "identify", length) == 0)) {
645 int x, y, thing;
646
647 if (argc != 4) {
648 Tcl_AppendResult(interp, "wrong # args: should be \"",
649 argv[0], " identify x y\"", (char *)NULL);
650 goto error;
651 }
652 if ((Tcl_GetInt(interp, argv[2], &x) != TCL_OK)
653 || (Tcl_GetInt(interp, argv[3], &y) != TCL_OK)) {
654 goto error;
655 }
656 thing = ScrollbarPosition(scrollPtr, x, y);
657 switch (thing) {
658 case TOP_ARROW:
659 Tcl_SetResult(interp, "arrow1", TCL_STATIC);
660 break;
661 case TOP_GAP:
662 Tcl_SetResult(interp, "trough1", TCL_STATIC);
663 break;
664 case SLIDER:
665 Tcl_SetResult(interp, "slider", TCL_STATIC);
666 break;
667 case BOTTOM_GAP:
668 Tcl_SetResult(interp, "trough2", TCL_STATIC);
669 break;
670 case BOTTOM_ARROW:
671 Tcl_SetResult(interp, "arrow2", TCL_STATIC);
672 break;
673 }
674 } else if ((c == 's') && (strncmp(argv[1], "set", length) == 0)) {
675 int totalUnits, windowUnits, firstUnit, lastUnit;
676
677 if (argc == 4) {
678 double first, last;
679
680 if (Tcl_GetDouble(interp, argv[2], &first) != TCL_OK) {
681 goto error;
682 }
683 if (Tcl_GetDouble(interp, argv[3], &last) != TCL_OK) {
684 goto error;
685 }
686 if (first < 0) {
687 scrollPtr->firstFraction = 0;
688 } else if (first > 1.0) {
689 scrollPtr->firstFraction = 1.0;
690 } else {
691 scrollPtr->firstFraction = first;
692 }
693 if (last < scrollPtr->firstFraction) {
694 scrollPtr->lastFraction = scrollPtr->firstFraction;
695 } else if (last > 1.0) {
696 scrollPtr->lastFraction = 1.0;
697 } else {
698 scrollPtr->lastFraction = last;
699 }
700 scrollPtr->flags |= NEW_STYLE_COMMANDS;
701 } else if (argc == 6) {
702 if (Tcl_GetInt(interp, argv[2], &totalUnits) != TCL_OK) {
703 goto error;
704 }
705 if (totalUnits < 0) {
706 totalUnits = 0;
707 }
708 if (Tcl_GetInt(interp, argv[3], &windowUnits) != TCL_OK) {
709 goto error;
710 }
711 if (windowUnits < 0) {
712 windowUnits = 0;
713 }
714 if (Tcl_GetInt(interp, argv[4], &firstUnit) != TCL_OK) {
715 goto error;
716 }
717 if (Tcl_GetInt(interp, argv[5], &lastUnit) != TCL_OK) {
718 goto error;
719 }
720 if (totalUnits > 0) {
721 if (lastUnit < firstUnit) {
722 lastUnit = firstUnit;
723 }
724 } else {
725 firstUnit = lastUnit = 0;
726 }
727 scrollPtr->totalUnits = totalUnits;
728 scrollPtr->windowUnits = windowUnits;
729 scrollPtr->firstUnit = firstUnit;
730 scrollPtr->lastUnit = lastUnit;
731 if (scrollPtr->totalUnits == 0) {
732 scrollPtr->firstFraction = 0.0;
733 scrollPtr->lastFraction = 1.0;
734 } else {
735 scrollPtr->firstFraction = ((double)firstUnit) / totalUnits;
736 scrollPtr->lastFraction = ((double)(lastUnit + 1)) / totalUnits;
737 }
738 scrollPtr->flags &= ~NEW_STYLE_COMMANDS;
739 } else {
740 Tcl_AppendResult(interp, "wrong # args: should be \"",
741 argv[0], " set firstFraction lastFraction\" or \"",
742 argv[0],
743 " set totalUnits windowUnits firstUnit lastUnit\"",
744 (char *)NULL);
745 goto error;
746 }
747 ComputeScrollbarGeometry(scrollPtr);
748 EventuallyRedraw(scrollPtr);
749 } else {
750 Tcl_AppendResult(interp, "bad option \"", argv[1],
751 "\": must be activate, cget, configure, delta, fraction, ",
752 "get, identify, or set", (char *)NULL);
753 goto error;
754 }
755 done:
756 Tcl_Release((ClientData)scrollPtr);
757 return result;
758
759 error:
760 Tcl_Release((ClientData)scrollPtr);
761 return TCL_ERROR;
762 }
763
764 /*
765 *----------------------------------------------------------------------
766 *
767 * DestroyScrollbar --
768 *
769 * This procedure is invoked by Tcl_EventuallyFree or Tcl_Release
770 * to clean up the internal structure of a scrollbar at a safe time
771 * (when no-one is using it anymore).
772 *
773 * Results:
774 * None.
775 *
776 * Side effects:
777 * Everything associated with the scrollbar is freed up.
778 *
779 *----------------------------------------------------------------------
780 */
781
782 static void
DestroyScrollbar(memPtr)783 DestroyScrollbar(memPtr)
784 DestroyData *memPtr; /* Info about scrollbar widget. */
785 {
786 register Scrollbar *scrollPtr = (Scrollbar *)memPtr;
787
788 /*
789 * Free up all the stuff that requires special handling, then
790 * let Tk_FreeOptions handle all the standard option-related
791 * stuff.
792 */
793
794 if (scrollPtr->troughGC != None) {
795 Tk_FreeGC(scrollPtr->display, scrollPtr->troughGC);
796 }
797 if (scrollPtr->copyGC != None) {
798 Tk_FreeGC(scrollPtr->display, scrollPtr->copyGC);
799 }
800 if (scrollPtr->activeTile != NULL) {
801 Blt_FreeTile(scrollPtr->activeTile);
802 }
803 if (scrollPtr->tile != NULL) {
804 Blt_FreeTile(scrollPtr->tile);
805 }
806 if (scrollPtr->tile2 != NULL) {
807 Blt_FreeTile(scrollPtr->tile2);
808 }
809 if (scrollPtr->image != NULL) {
810 Tk_FreeImage(scrollPtr->image);
811 }
812 Tk_FreeOptions(configSpecs, (char *)scrollPtr, scrollPtr->display, 0);
813 Blt_Free(scrollPtr);
814 }
815
816 /*
817 *----------------------------------------------------------------------
818 *
819 * TileChangedProc
820 *
821 * Routine for tile change notifications.
822 *
823 * Results:
824 * None.
825 *
826 *----------------------------------------------------------------------
827 */
828 /*ARGSUSED*/
829 static void
TileChangedProc(clientData,tile)830 TileChangedProc(clientData, tile)
831 ClientData clientData;
832 Blt_Tile tile; /* Not used. */
833 {
834 Scrollbar *scrollPtr = clientData;
835
836 if (scrollPtr->tkwin != NULL) {
837 EventuallyRedraw(scrollPtr);
838 }
839 }
840
841 /*
842 *----------------------------------------------------------------------
843 *
844 * ScrollbarImageProc --
845 *
846 * This function is invoked by the image code whenever the manager for an
847 * image does something that affects the size or contents of an image
848 * displayed in a button.
849 *
850 * Results:
851 * None.
852 *
853 * Side effects:
854 * Arranges for the button to get redisplayed.
855 *
856 *----------------------------------------------------------------------
857 */
858
859 static void
ScrollbarImageProc(ClientData clientData,int x,int y,int width,int height,int imgWidth,int imgHeight)860 ScrollbarImageProc(
861 ClientData clientData, /* Pointer to widget record. */
862 int x, int y, /* Upper left pixel (within image) that must
863 * be redisplayed. */
864 int width, int height, /* Dimensions of area to redisplay (might be
865 * <= 0). */
866 int imgWidth, int imgHeight)/* New dimensions of image. */
867 {
868 register Scrollbar *scrollPtr = (Scrollbar *) clientData;
869
870 if (scrollPtr->tkwin != NULL) {
871 ComputeScrollbarGeometry(scrollPtr);
872 if (Tk_IsMapped(scrollPtr->tkwin) && !(scrollPtr->flags & REDRAW_PENDING)) {
873 Tcl_DoWhenIdle(DisplayScrollbar, (ClientData) scrollPtr);
874 scrollPtr->flags |= REDRAW_PENDING;
875 }
876 }
877 }
878
879 /*
880 *----------------------------------------------------------------------
881 *
882 * ConfigureScrollbar --
883 *
884 * This procedure is called to process an argv/argc list, plus
885 * the Tk option database, in order to configure (or
886 * reconfigure) a scrollbar widget.
887 *
888 * Results:
889 * The return value is a standard Tcl result. If TCL_ERROR is
890 * returned, then interp->result contains an error message.
891 *
892 * Side effects:
893 * Configuration information, such as colors, border width,
894 * etc. get set for scrollPtr; old resources get freed,
895 * if there were any.
896 *
897 *----------------------------------------------------------------------
898 */
899
900 static int
ConfigureScrollbar(interp,scrollPtr,argc,argv,flags)901 ConfigureScrollbar(interp, scrollPtr, argc, argv, flags)
902 Tcl_Interp *interp; /* Used for error reporting. */
903 register Scrollbar *scrollPtr; /* Information about widget; may or
904 * may not already have values for
905 * some fields. */
906 int argc; /* Number of valid entries in argv. */
907 char **argv; /* Arguments. */
908 int flags; /* Flags to pass to
909 * Tk_ConfigureWidget. */
910 {
911 size_t length;
912 XGCValues gcValues;
913 GC new;
914 Tk_Image image;
915
916 if (Tk_ConfigureWidget(interp, scrollPtr->tkwin, configSpecs,
917 argc, argv, (char *)scrollPtr, flags) != TCL_OK) {
918 return TCL_ERROR;
919 }
920 /*
921 * A few options need special processing, such as parsing the
922 * orientation or setting the background from a 3-D border.
923 */
924
925 length = strlen(scrollPtr->orientUid);
926 if (strncmp(scrollPtr->orientUid, "vertical", length) == 0) {
927 scrollPtr->vertical = 1;
928 } else if (strncmp(scrollPtr->orientUid, "horizontal", length) == 0) {
929 scrollPtr->vertical = 0;
930 } else {
931 Tcl_AppendResult(interp, "bad orientation \"", scrollPtr->orientUid,
932 "\": must be vertical or horizontal", (char *)NULL);
933 return TCL_ERROR;
934 }
935
936 if (scrollPtr->command != NULL) {
937 scrollPtr->commandSize = strlen(scrollPtr->command);
938 } else {
939 scrollPtr->commandSize = 0;
940 }
941
942 /* Get the images for the widget, if there are any. Allocate the new
943 * images before freeing the old ones, so that the reference counts
944 * don't go to zero and cause image data to be discarded.
945 */
946
947 if (scrollPtr->imagePtr != NULL) {
948 image = Tk_GetImage(scrollPtr->interp, scrollPtr->tkwin,
949 scrollPtr->imagePtr, ScrollbarImageProc,
950 (ClientData) scrollPtr);
951 } else {
952 image = NULL;
953 }
954 if (scrollPtr->image != NULL) {
955 Tk_FreeImage(scrollPtr->image);
956 }
957 scrollPtr->image = image;
958
959 if (scrollPtr->activeTile != NULL) {
960 Blt_SetTileChangedProc(scrollPtr->activeTile, TileChangedProc,
961 (ClientData)scrollPtr);
962 }
963 if (scrollPtr->tile != NULL) {
964 Blt_SetTileChangedProc(scrollPtr->tile, TileChangedProc,
965 (ClientData)scrollPtr);
966 }
967 if (scrollPtr->tile2 != NULL) {
968 Blt_SetTileChangedProc(scrollPtr->tile2, TileChangedProc,
969 (ClientData)scrollPtr);
970 }
971 Tk_SetBackgroundFromBorder(scrollPtr->tkwin, scrollPtr->bgBorder);
972
973 gcValues.foreground = scrollPtr->troughColorPtr->pixel;
974 new = Tk_GetGC(scrollPtr->tkwin, GCForeground, &gcValues);
975 if (scrollPtr->troughGC != None) {
976 Tk_FreeGC(scrollPtr->display, scrollPtr->troughGC);
977 }
978 scrollPtr->troughGC = new;
979 if (scrollPtr->copyGC == None) {
980 gcValues.graphics_exposures = False;
981 scrollPtr->copyGC = Tk_GetGC(scrollPtr->tkwin, GCGraphicsExposures,
982 &gcValues);
983 }
984 /*
985 * Register the desired geometry for the window (leave enough space
986 * for the two arrows plus a minimum-size slider, plus border around
987 * the whole window, if any). Then arrange for the window to be
988 * redisplayed.
989 */
990
991 ComputeScrollbarGeometry(scrollPtr);
992 EventuallyRedraw(scrollPtr);
993 return TCL_OK;
994 }
995
996 /*
997 *--------------------------------------------------------------
998 *
999 * DisplayScrollbar --
1000 *
1001 * This procedure redraws the contents of a scrollbar window.
1002 * It is invoked as a do-when-idle handler, so it only runs
1003 * when there's nothing else for the application to do.
1004 *
1005 * Results:
1006 * None.
1007 *
1008 * Side effects:
1009 * Information appears on the screen.
1010 *
1011 *--------------------------------------------------------------
1012 */
1013
1014 static void
DisplayScrollbar(clientData)1015 DisplayScrollbar(clientData)
1016 ClientData clientData; /* Information about window. */
1017 {
1018 register Scrollbar *scrollPtr = clientData;
1019 register Tk_Window tkwin = scrollPtr->tkwin;
1020 XPoint points[7];
1021 Tk_3DBorder border;
1022 int relief, width, elementBorderWidth;
1023 Pixmap pixmap;
1024 Blt_Tile tile, tiletr, tilecur;
1025
1026 tiletr = (Blt_HasTile(scrollPtr->tile) ? scrollPtr->tile : NULL);
1027 tile = (Blt_HasTile(scrollPtr->tile2) ? scrollPtr->tile2 : tiletr);
1028 if ((scrollPtr->tkwin == NULL) || !Tk_IsMapped(tkwin)) {
1029 goto done;
1030 }
1031 if (scrollPtr->vertical) {
1032 width = Tk_Width(tkwin) - 2 * scrollPtr->inset;
1033 } else {
1034 width = Tk_Height(tkwin) - 2 * scrollPtr->inset;
1035 }
1036 elementBorderWidth = scrollPtr->elementBorderWidth;
1037 if (elementBorderWidth < 0) {
1038 elementBorderWidth = scrollPtr->borderWidth;
1039 }
1040
1041 /*
1042 * In order to avoid screen flashes, this procedure redraws
1043 * the scrollbar in a pixmap, then copies the pixmap to the
1044 * screen in a single operation. This means that there's no
1045 * point in time where the on-sreen image has been cleared.
1046 */
1047
1048 pixmap = Tk_GetPixmap(scrollPtr->display, Tk_WindowId(tkwin),
1049 Tk_Width(tkwin), Tk_Height(tkwin), Tk_Depth(tkwin));
1050
1051 if (scrollPtr->highlightWidth != 0) {
1052 GC gc;
1053
1054 if (scrollPtr->flags & GOT_FOCUS) {
1055 gc = Tk_GCForColor(scrollPtr->highlightColorPtr, pixmap);
1056 } else {
1057 gc = Tk_GCForColor(scrollPtr->highlightBgColorPtr, pixmap);
1058 }
1059 Tk_DrawFocusHighlight(tkwin, gc, scrollPtr->highlightWidth, pixmap);
1060 }
1061 Blt_Draw3DRectangle(tkwin, pixmap, scrollPtr->bgBorder,
1062 scrollPtr->highlightWidth, scrollPtr->highlightWidth,
1063 Tk_Width(tkwin) - 2 * scrollPtr->highlightWidth,
1064 Tk_Height(tkwin) - 2 * scrollPtr->highlightWidth,
1065 scrollPtr->borderWidth, scrollPtr->relief);
1066
1067 if (tiletr != NULL) {
1068 Blt_SetTileOrigin(tkwin, tiletr, 0, 0);
1069 Blt_TileRectangle(tkwin, pixmap, tiletr, scrollPtr->inset,
1070 scrollPtr->inset,
1071 (unsigned)(Tk_Width(tkwin) - 2 * scrollPtr->inset),
1072 (unsigned)(Tk_Height(tkwin) - 2 * scrollPtr->inset));
1073 } else {
1074 XFillRectangle(scrollPtr->display, pixmap, scrollPtr->troughGC,
1075 scrollPtr->inset, scrollPtr->inset,
1076 (unsigned)(Tk_Width(tkwin) - 2 * scrollPtr->inset),
1077 (unsigned)(Tk_Height(tkwin) - 2 * scrollPtr->inset));
1078 }
1079
1080 /*
1081 * Draw the top or left arrow. The coordinates of the polygon
1082 * points probably seem odd, but they were carefully chosen with
1083 * respect to X's rules for filling polygons. These point choices
1084 * cause the arrows to just fill the narrow dimension of the
1085 * scrollbar and be properly centered.
1086 */
1087 tilecur = tile;
1088 if (scrollPtr->activeField == TOP_ARROW) {
1089 border = scrollPtr->activeBorder;
1090 relief = scrollPtr->activeField == TOP_ARROW ? scrollPtr->activeRelief
1091 : TK_RELIEF_RAISED;
1092 if (Blt_HasTile(scrollPtr->activeTile)) {
1093 Blt_SetTileOrigin(tkwin, scrollPtr->activeTile, 0, 0);
1094 tilecur = scrollPtr->activeTile;
1095 }
1096 } else {
1097 border = scrollPtr->bgBorder;
1098 relief = TK_RELIEF_RAISED;
1099 }
1100 #ifdef notdef
1101 if (scrollPtr->vertical) {
1102 points[0].x = scrollPtr->inset - 1;
1103 points[0].y = scrollPtr->arrowLength + scrollPtr->inset - 1;
1104 points[1].x = width + scrollPtr->inset;
1105 points[1].y = points[0].y;
1106 points[2].x = width / 2 + scrollPtr->inset;
1107 points[2].y = scrollPtr->inset - 1;
1108 } else {
1109 points[0].x = scrollPtr->arrowLength + scrollPtr->inset - 1;
1110 points[0].y = scrollPtr->inset - 1;
1111 points[1].x = scrollPtr->inset;
1112 points[1].y = width / 2 + scrollPtr->inset;
1113 points[2].x = points[0].x;
1114 points[2].y = width + scrollPtr->inset;
1115 }
1116 if (tilecur != NULL) {
1117 Blt_TilePolygon(tkwin, pixmap, tilecur, points, 3);
1118 Tk_Draw3DPolygon(tkwin, pixmap, border, points, 3,
1119 elementBorderWidth, relief);
1120 } else {
1121 Tk_Fill3DPolygon(tkwin, pixmap, border, points, 3,
1122 elementBorderWidth, relief);
1123 }
1124 #else
1125 Blt_Fill3DRectangleTile(tkwin, pixmap, border, scrollPtr->inset,
1126 scrollPtr->inset, width, width, elementBorderWidth, relief, tilecur, 0, 0);
1127
1128 Blt_DrawArrow(scrollPtr->display, pixmap, scrollPtr->copyGC,
1129 scrollPtr->inset + width / 2,
1130 scrollPtr->inset + width / 2,
1131 STD_ARROW_HEIGHT,
1132 (scrollPtr->vertical) ? ARROW_UP : ARROW_LEFT);
1133 #endif
1134 /*
1135 * Display the bottom or right arrow.
1136 */
1137 tilecur = tile;
1138 if (scrollPtr->activeField == BOTTOM_ARROW) {
1139 border = scrollPtr->activeBorder;
1140 relief = scrollPtr->activeField == BOTTOM_ARROW
1141 ? scrollPtr->activeRelief : TK_RELIEF_RAISED;
1142 if (Blt_HasTile(scrollPtr->activeTile)) {
1143 Blt_SetTileOrigin(tkwin, scrollPtr->activeTile, 0, 0);
1144 tilecur = scrollPtr->activeTile;
1145 }
1146 } else {
1147 border = scrollPtr->bgBorder;
1148 relief = TK_RELIEF_RAISED;
1149 }
1150 #ifdef notdef
1151 if (scrollPtr->vertical) {
1152 points[0].x = scrollPtr->inset;
1153 points[0].y = Tk_Height(tkwin) - scrollPtr->arrowLength
1154 - scrollPtr->inset + 1;
1155 points[1].x = width / 2 + scrollPtr->inset;
1156 points[1].y = Tk_Height(tkwin) - scrollPtr->inset;
1157 points[2].x = width + scrollPtr->inset;
1158 points[2].y = points[0].y;
1159 } else {
1160 points[0].x = Tk_Width(tkwin) - scrollPtr->arrowLength
1161 - scrollPtr->inset + 1;
1162 points[0].y = scrollPtr->inset - 1;
1163 points[1].x = points[0].x;
1164 points[1].y = width + scrollPtr->inset;
1165 points[2].x = Tk_Width(tkwin) - scrollPtr->inset;
1166 points[2].y = width / 2 + scrollPtr->inset;
1167 }
1168 if (tile != NULL) {
1169 Blt_TilePolygon(tkwin, pixmap, tile, points, 3);
1170 Tk_Draw3DPolygon(tkwin, pixmap, border, points, 3,
1171 elementBorderWidth, relief);
1172 } else {
1173 Tk_Fill3DPolygon(tkwin, pixmap, border, points, 3,
1174 elementBorderWidth, relief);
1175 }
1176 #else
1177 Blt_Fill3DRectangleTile(tkwin, pixmap, border,
1178 Tk_Width(tkwin) - (width + scrollPtr->inset),
1179 Tk_Height(tkwin) - (width + scrollPtr->inset),
1180 width, width, elementBorderWidth, relief, tilecur, 0, 0);
1181
1182 Blt_DrawArrow(scrollPtr->display, pixmap, scrollPtr->copyGC,
1183 Tk_Width(tkwin) - (scrollPtr->inset + width / 2) - 1,
1184 Tk_Height(tkwin) - (scrollPtr->inset + width / 2) - 1,
1185 STD_ARROW_HEIGHT,
1186 (scrollPtr->vertical) ? ARROW_DOWN : ARROW_RIGHT);
1187 #endif
1188 /*
1189 * Display the slider.
1190 */
1191 tilecur = tile;
1192 if (scrollPtr->activeField == SLIDER) {
1193 border = scrollPtr->activeBorder;
1194 relief = scrollPtr->activeField == SLIDER ? scrollPtr->activeRelief
1195 : TK_RELIEF_RAISED;
1196 if (Blt_HasTile(scrollPtr->activeTile)) {
1197 Blt_SetTileOrigin(tkwin, scrollPtr->activeTile, 0, 0);
1198 tilecur = scrollPtr->activeTile;
1199 }
1200 } else {
1201 border = scrollPtr->bgBorder;
1202 relief = TK_RELIEF_RAISED;
1203 }
1204 if (scrollPtr->vertical) {
1205 if (tilecur) {
1206 Blt_TileRectangle(tkwin, pixmap, tilecur, scrollPtr->inset,
1207 scrollPtr->sliderFirst, width - 1,
1208 scrollPtr->sliderLast - scrollPtr->sliderFirst - 1);
1209 Blt_Draw3DRectangle(tkwin, pixmap, border,
1210 scrollPtr->inset, scrollPtr->sliderFirst,
1211 width, scrollPtr->sliderLast - scrollPtr->sliderFirst,
1212 elementBorderWidth, relief);
1213 } else {
1214 Blt_Fill3DRectangle(tkwin, pixmap, border,
1215 scrollPtr->inset, scrollPtr->sliderFirst,
1216 width, scrollPtr->sliderLast - scrollPtr->sliderFirst,
1217 elementBorderWidth, relief);
1218 }
1219 } else {
1220 if (tilecur) {
1221 Blt_TileRectangle(tkwin, pixmap, tilecur, scrollPtr->sliderFirst,
1222 scrollPtr->inset,
1223 scrollPtr->sliderLast - scrollPtr->sliderFirst - 1, width - 1);
1224 Blt_Draw3DRectangle(tkwin, pixmap, border,
1225 scrollPtr->sliderFirst, scrollPtr->inset,
1226 scrollPtr->sliderLast - scrollPtr->sliderFirst, width,
1227 elementBorderWidth, relief);
1228 } else {
1229 Blt_Fill3DRectangle(tkwin, pixmap, border,
1230 scrollPtr->sliderFirst, scrollPtr->inset,
1231 scrollPtr->sliderLast - scrollPtr->sliderFirst, width,
1232 elementBorderWidth, relief);
1233 }
1234 }
1235
1236 if (scrollPtr->image != NULL) {
1237 /* Draw adornment image centered on bar. */
1238 int imgW, imgH, xLen, yLen, yStart, xStart, yOfs = 0, xOfs = 0, pad = 1 + scrollPtr->borderWidth;
1239
1240 Tk_SizeOfImage(scrollPtr->image, &imgW, &imgH);
1241
1242 if (scrollPtr->vertical) {
1243 xLen = width;
1244 yLen = scrollPtr->sliderLast - scrollPtr->sliderFirst;
1245 } else {
1246 yLen = width;
1247 xLen = scrollPtr->sliderLast - scrollPtr->sliderFirst;
1248
1249 }
1250 if (imgW > (xLen-pad*2)) {
1251 int oWid = imgW;
1252 imgW = (xLen-pad*2);
1253 xOfs = (oWid-imgW)/2;
1254 }
1255 if (imgH > (yLen-pad*2)) {
1256 int oWid = imgH;
1257 imgH = (yLen-pad*2);
1258 yOfs = (oWid-imgH)/2;
1259 }
1260 xStart = (xLen - imgW)/2+pad;
1261 yStart = (yLen - imgH)/2+pad;
1262 if (scrollPtr->vertical) {
1263 yStart += scrollPtr->sliderFirst;
1264 } else {
1265 xStart += scrollPtr->sliderFirst;
1266 }
1267 if (xStart>=0 && yStart>=0 && imgW > 0 && imgH > 0) {
1268 Tk_RedrawImage(scrollPtr->image, xOfs, yOfs, imgW, imgH, pixmap, xStart, yStart);
1269 }
1270 }
1271
1272 /*
1273 * Copy the information from the off-screen pixmap onto the screen,
1274 * then delete the pixmap.
1275 */
1276
1277 XCopyArea(scrollPtr->display, pixmap, Tk_WindowId(tkwin),
1278 scrollPtr->copyGC, 0, 0, (unsigned)Tk_Width(tkwin),
1279 (unsigned)Tk_Height(tkwin), 0, 0);
1280 Tk_FreePixmap(scrollPtr->display, pixmap);
1281
1282 done:
1283 scrollPtr->flags &= ~REDRAW_PENDING;
1284 }
1285
1286 /*
1287 *--------------------------------------------------------------
1288 *
1289 * ScrollbarEventProc --
1290 *
1291 * This procedure is invoked by the Tk dispatcher for various
1292 * events on scrollbars.
1293 *
1294 * Results:
1295 * None.
1296 *
1297 * Side effects:
1298 * When the window gets deleted, internal structures get
1299 * cleaned up. When it gets exposed, it is redisplayed.
1300 *
1301 *--------------------------------------------------------------
1302 */
1303
1304 static void
ScrollbarEventProc(clientData,eventPtr)1305 ScrollbarEventProc(clientData, eventPtr)
1306 ClientData clientData; /* Information about window. */
1307 XEvent *eventPtr; /* Information about event. */
1308 {
1309 Scrollbar *scrollPtr = clientData;
1310
1311 if ((eventPtr->type == Expose) && (eventPtr->xexpose.count == 0)) {
1312 EventuallyRedraw(scrollPtr);
1313 } else if (eventPtr->type == DestroyNotify) {
1314 if (scrollPtr->tkwin != NULL) {
1315 scrollPtr->tkwin = NULL;
1316 Tcl_DeleteCommandFromToken(scrollPtr->interp,scrollPtr->widgetCmd);
1317 }
1318 if (scrollPtr->flags & REDRAW_PENDING) {
1319 Tcl_CancelIdleCall(DisplayScrollbar, (ClientData)scrollPtr);
1320 }
1321 Tcl_EventuallyFree((ClientData)scrollPtr,
1322 (Tcl_FreeProc *)DestroyScrollbar);
1323 } else if (eventPtr->type == ConfigureNotify) {
1324 ComputeScrollbarGeometry(scrollPtr);
1325 EventuallyRedraw(scrollPtr);
1326 } else if (eventPtr->type == FocusIn) {
1327 if (eventPtr->xfocus.detail != NotifyInferior) {
1328 scrollPtr->flags |= GOT_FOCUS;
1329 if (scrollPtr->highlightWidth > 0) {
1330 EventuallyRedraw(scrollPtr);
1331 }
1332 }
1333 } else if (eventPtr->type == FocusOut) {
1334 if (eventPtr->xfocus.detail != NotifyInferior) {
1335 scrollPtr->flags &= ~GOT_FOCUS;
1336 if (scrollPtr->highlightWidth > 0) {
1337 EventuallyRedraw(scrollPtr);
1338 }
1339 }
1340 }
1341 }
1342
1343 /*
1344 *----------------------------------------------------------------------
1345 *
1346 * ScrollbarCmdDeletedProc --
1347 *
1348 * This procedure is invoked when a widget command is deleted. If
1349 * the widget isn't already in the process of being destroyed,
1350 * this command destroys it.
1351 *
1352 * Results:
1353 * None.
1354 *
1355 * Side effects:
1356 * The widget is destroyed.
1357 *
1358 *----------------------------------------------------------------------
1359 */
1360
1361 static void
ScrollbarCmdDeletedProc(clientData)1362 ScrollbarCmdDeletedProc(clientData)
1363 ClientData clientData; /* Pointer to widget record for widget. */
1364 {
1365 Scrollbar *scrollPtr = clientData;
1366 Tk_Window tkwin = scrollPtr->tkwin;
1367
1368 /*
1369 * This procedure could be invoked either because the window was
1370 * destroyed and the command was then deleted (in which case tkwin
1371 * is NULL) or because the command was deleted, and then this procedure
1372 * destroys the widget.
1373 */
1374
1375 if (tkwin != NULL) {
1376 #ifdef ITCL_NAMESPACES
1377 Itk_SetWidgetCommand(scrollPtr->tkwin, (Tcl_Command) NULL);
1378 #endif
1379 scrollPtr->tkwin = NULL;
1380 Tk_DestroyWindow(tkwin);
1381 }
1382 }
1383
1384 /*
1385 *----------------------------------------------------------------------
1386 *
1387 * ComputeScrollbarGeometry --
1388 *
1389 * After changes in a scrollbar's size or configuration, this
1390 * procedure recomputes various geometry information used in
1391 * displaying the scrollbar.
1392 *
1393 * Results:
1394 * None.
1395 *
1396 * Side effects:
1397 * The scrollbar will be displayed differently.
1398 *
1399 *----------------------------------------------------------------------
1400 */
1401
1402 static void
ComputeScrollbarGeometry(scrollPtr)1403 ComputeScrollbarGeometry(scrollPtr)
1404 register Scrollbar *scrollPtr; /* Scrollbar whose geometry may
1405 * have changed. */
1406 {
1407 int width, fieldLength;
1408
1409 if (scrollPtr->highlightWidth < 0) {
1410 scrollPtr->highlightWidth = 0;
1411 }
1412 scrollPtr->inset = scrollPtr->highlightWidth + scrollPtr->borderWidth;
1413 width = (scrollPtr->vertical) ? Tk_Width(scrollPtr->tkwin)
1414 : Tk_Height(scrollPtr->tkwin);
1415 scrollPtr->arrowLength = width - 2 * scrollPtr->inset + 1;
1416 fieldLength = (scrollPtr->vertical ? Tk_Height(scrollPtr->tkwin)
1417 : Tk_Width(scrollPtr->tkwin))
1418 - 2 * (scrollPtr->arrowLength + scrollPtr->inset);
1419 if (fieldLength < 0) {
1420 fieldLength = 0;
1421 }
1422 scrollPtr->sliderFirst = fieldLength * scrollPtr->firstFraction;
1423 scrollPtr->sliderLast = fieldLength * scrollPtr->lastFraction;
1424
1425 /*
1426 * Adjust the slider so that some piece of it is always
1427 * displayed in the scrollbar and so that it has at least
1428 * a minimal width (so it can be grabbed with the mouse).
1429 */
1430
1431 if (scrollPtr->sliderFirst > (fieldLength - 2 * scrollPtr->borderWidth)) {
1432 scrollPtr->sliderFirst = fieldLength - 2 * scrollPtr->borderWidth;
1433 }
1434 if (scrollPtr->sliderFirst < 0) {
1435 scrollPtr->sliderFirst = 0;
1436 }
1437 if (scrollPtr->sliderLast < (scrollPtr->sliderFirst + MIN_SLIDER_LENGTH)) {
1438 scrollPtr->sliderLast = scrollPtr->sliderFirst + MIN_SLIDER_LENGTH;
1439 }
1440 if (scrollPtr->sliderLast > fieldLength) {
1441 scrollPtr->sliderLast = fieldLength;
1442 }
1443 scrollPtr->sliderFirst += scrollPtr->arrowLength + scrollPtr->inset;
1444 scrollPtr->sliderLast += scrollPtr->arrowLength + scrollPtr->inset;
1445
1446 /*
1447 * Register the desired geometry for the window (leave enough space
1448 * for the two arrows plus a minimum-size slider, plus border around
1449 * the whole window, if any). Then arrange for the window to be
1450 * redisplayed.
1451 */
1452
1453 if (scrollPtr->vertical) {
1454 Tk_GeometryRequest(scrollPtr->tkwin,
1455 scrollPtr->width + 2 * scrollPtr->inset,
1456 2 * (scrollPtr->arrowLength + scrollPtr->borderWidth
1457 + scrollPtr->inset));
1458 } else {
1459 Tk_GeometryRequest(scrollPtr->tkwin,
1460 2 * (scrollPtr->arrowLength + scrollPtr->borderWidth
1461 + scrollPtr->inset), scrollPtr->width + 2 * scrollPtr->inset);
1462 }
1463 Tk_SetInternalBorder(scrollPtr->tkwin, scrollPtr->inset);
1464 }
1465
1466 /*
1467 *--------------------------------------------------------------
1468 *
1469 * ScrollbarPosition --
1470 *
1471 * Determine the scrollbar element corresponding to a
1472 * given position.
1473 *
1474 * Results:
1475 * One of TOP_ARROW, TOP_GAP, etc., indicating which element
1476 * of the scrollbar covers the position given by (x, y). If
1477 * (x,y) is outside the scrollbar entirely, then OUTSIDE is
1478 * returned.
1479 *
1480 * Side effects:
1481 * None.
1482 *
1483 *--------------------------------------------------------------
1484 */
1485 static int
ScrollbarPosition(scrollPtr,x,y)1486 ScrollbarPosition(scrollPtr, x, y)
1487 register Scrollbar *scrollPtr; /* Scrollbar widget record. */
1488 int x, y; /* Coordinates within scrollPtr's
1489 * window. */
1490 {
1491 int length, width, tmp;
1492
1493 if (scrollPtr->vertical) {
1494 length = Tk_Height(scrollPtr->tkwin);
1495 width = Tk_Width(scrollPtr->tkwin);
1496 } else {
1497 tmp = x;
1498 x = y;
1499 y = tmp;
1500 length = Tk_Width(scrollPtr->tkwin);
1501 width = Tk_Height(scrollPtr->tkwin);
1502 }
1503
1504 if ((x < scrollPtr->inset) || (x >= (width - scrollPtr->inset))
1505 || (y < scrollPtr->inset) || (y >= (length - scrollPtr->inset))) {
1506 return OUTSIDE;
1507 }
1508 /*
1509 * All of the calculations in this procedure mirror those in
1510 * DisplayScrollbar. Be sure to keep the two consistent.
1511 */
1512
1513 if (y < (scrollPtr->inset + scrollPtr->arrowLength)) {
1514 return TOP_ARROW;
1515 }
1516 if (y < scrollPtr->sliderFirst) {
1517 return TOP_GAP;
1518 }
1519 if (y < scrollPtr->sliderLast) {
1520 return SLIDER;
1521 }
1522 if (y >= (length - (scrollPtr->arrowLength + scrollPtr->inset))) {
1523 return BOTTOM_ARROW;
1524 }
1525 return BOTTOM_GAP;
1526 }
1527
1528 /*
1529 *--------------------------------------------------------------
1530 *
1531 * EventuallyRedraw --
1532 *
1533 * Arrange for one or more of the fields of a scrollbar
1534 * to be redrawn.
1535 *
1536 * Results:
1537 * None.
1538 *
1539 * Side effects:
1540 * None.
1541 *
1542 *--------------------------------------------------------------
1543 */
1544
1545 static void
EventuallyRedraw(scrollPtr)1546 EventuallyRedraw(scrollPtr)
1547 register Scrollbar *scrollPtr; /* Information about widget. */
1548 {
1549 if ((scrollPtr->tkwin == NULL) || (!Tk_IsMapped(scrollPtr->tkwin))) {
1550 return;
1551 }
1552 if ((scrollPtr->flags & REDRAW_PENDING) == 0) {
1553 Tcl_DoWhenIdle(DisplayScrollbar, (ClientData)scrollPtr);
1554 scrollPtr->flags |= REDRAW_PENDING;
1555 }
1556 }
1557
1558 int
Blt_ScrollbarInit(interp)1559 Blt_ScrollbarInit(interp)
1560 Tcl_Interp *interp;
1561 {
1562 static Blt_CmdSpec cmdSpecs[2] =
1563 {
1564 { "scrollbar", ScrollbarCmd, },
1565 { "bscrollbar", BScrollbarCmd, },
1566 };
1567
1568 return Blt_InitCmds(interp, "blt::tile", cmdSpecs, 2);
1569 }
1570
1571 #endif /* NO_TILESCROLLBAR */
1572