1 | # menu.tcl -- |
---|
2 | # |
---|
3 | # This file defines the default bindings for Tk menus and menubuttons. |
---|
4 | # It also implements keyboard traversal of menus and implements a few |
---|
5 | # other utility procedures related to menus. |
---|
6 | # |
---|
7 | # RCS: @(#) $Id: menu.tcl,v 1.12 2000/04/17 19:32:00 ericm Exp $ |
---|
8 | # |
---|
9 | # Copyright (c) 1992-1994 The Regents of the University of California. |
---|
10 | # Copyright (c) 1994-1997 Sun Microsystems, Inc. |
---|
11 | # Copyright (c) 1998-1999 by Scriptics Corporation. |
---|
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 | |
---|
17 | #------------------------------------------------------------------------- |
---|
18 | # Elements of tkPriv that are used in this file: |
---|
19 | # |
---|
20 | # cursor - Saves the -cursor option for the posted menubutton. |
---|
21 | # focus - Saves the focus during a menu selection operation. |
---|
22 | # Focus gets restored here when the menu is unposted. |
---|
23 | # grabGlobal - Used in conjunction with tkPriv(oldGrab): if |
---|
24 | # tkPriv(oldGrab) is non-empty, then tkPriv(grabGlobal) |
---|
25 | # contains either an empty string or "-global" to |
---|
26 | # indicate whether the old grab was a local one or |
---|
27 | # a global one. |
---|
28 | # inMenubutton - The name of the menubutton widget containing |
---|
29 | # the mouse, or an empty string if the mouse is |
---|
30 | # not over any menubutton. |
---|
31 | # menuBar - The name of the menubar that is the root |
---|
32 | # of the cascade hierarchy which is currently |
---|
33 | # posted. This is null when there is no menu currently |
---|
34 | # being pulled down from a menu bar. |
---|
35 | # oldGrab - Window that had the grab before a menu was posted. |
---|
36 | # Used to restore the grab state after the menu |
---|
37 | # is unposted. Empty string means there was no |
---|
38 | # grab previously set. |
---|
39 | # popup - If a menu has been popped up via tk_popup, this |
---|
40 | # gives the name of the menu. Otherwise this |
---|
41 | # value is empty. |
---|
42 | # postedMb - Name of the menubutton whose menu is currently |
---|
43 | # posted, or an empty string if nothing is posted |
---|
44 | # A grab is set on this widget. |
---|
45 | # relief - Used to save the original relief of the current |
---|
46 | # menubutton. |
---|
47 | # window - When the mouse is over a menu, this holds the |
---|
48 | # name of the menu; it's cleared when the mouse |
---|
49 | # leaves the menu. |
---|
50 | # tearoff - Whether the last menu posted was a tearoff or not. |
---|
51 | # This is true always for unix, for tearoffs for Mac |
---|
52 | # and Windows. |
---|
53 | # activeMenu - This is the last active menu for use |
---|
54 | # with the <<MenuSelect>> virtual event. |
---|
55 | # activeItem - This is the last active menu item for |
---|
56 | # use with the <<MenuSelect>> virtual event. |
---|
57 | #------------------------------------------------------------------------- |
---|
58 | |
---|
59 | #------------------------------------------------------------------------- |
---|
60 | # Overall note: |
---|
61 | # This file is tricky because there are five different ways that menus |
---|
62 | # can be used: |
---|
63 | # |
---|
64 | # 1. As a pulldown from a menubutton. In this style, the variable |
---|
65 | # tkPriv(postedMb) identifies the posted menubutton. |
---|
66 | # 2. As a torn-off menu copied from some other menu. In this style |
---|
67 | # tkPriv(postedMb) is empty, and menu's type is "tearoff". |
---|
68 | # 3. As an option menu, triggered from an option menubutton. In this |
---|
69 | # style tkPriv(postedMb) identifies the posted menubutton. |
---|
70 | # 4. As a popup menu. In this style tkPriv(postedMb) is empty and |
---|
71 | # the top-level menu's type is "normal". |
---|
72 | # 5. As a pulldown from a menubar. The variable tkPriv(menubar) has |
---|
73 | # the owning menubar, and the menu itself is of type "normal". |
---|
74 | # |
---|
75 | # The various binding procedures use the state described above to |
---|
76 | # distinguish the various cases and take different actions in each |
---|
77 | # case. |
---|
78 | #------------------------------------------------------------------------- |
---|
79 | |
---|
80 | #------------------------------------------------------------------------- |
---|
81 | # The code below creates the default class bindings for menus |
---|
82 | # and menubuttons. |
---|
83 | #------------------------------------------------------------------------- |
---|
84 | |
---|
85 | bind Menubutton <FocusIn> {} |
---|
86 | bind Menubutton <Enter> { |
---|
87 | tkMbEnter %W |
---|
88 | } |
---|
89 | bind Menubutton <Leave> { |
---|
90 | tkMbLeave %W |
---|
91 | } |
---|
92 | bind Menubutton <1> { |
---|
93 | if {[string compare $tkPriv(inMenubutton) ""]} { |
---|
94 | tkMbPost $tkPriv(inMenubutton) %X %Y |
---|
95 | } |
---|
96 | } |
---|
97 | bind Menubutton <Motion> { |
---|
98 | tkMbMotion %W up %X %Y |
---|
99 | } |
---|
100 | bind Menubutton <B1-Motion> { |
---|
101 | tkMbMotion %W down %X %Y |
---|
102 | } |
---|
103 | bind Menubutton <ButtonRelease-1> { |
---|
104 | tkMbButtonUp %W |
---|
105 | } |
---|
106 | bind Menubutton <space> { |
---|
107 | tkMbPost %W |
---|
108 | tkMenuFirstEntry [%W cget -menu] |
---|
109 | } |
---|
110 | |
---|
111 | # Must set focus when mouse enters a menu, in order to allow |
---|
112 | # mixed-mode processing using both the mouse and the keyboard. |
---|
113 | # Don't set the focus if the event comes from a grab release, |
---|
114 | # though: such an event can happen after as part of unposting |
---|
115 | # a cascaded chain of menus, after the focus has already been |
---|
116 | # restored to wherever it was before menu selection started. |
---|
117 | |
---|
118 | bind Menu <FocusIn> {} |
---|
119 | |
---|
120 | bind Menu <Enter> { |
---|
121 | set tkPriv(window) %W |
---|
122 | if {[string equal [%W cget -type] "tearoff"]} { |
---|
123 | if {[string compare "%m" "NotifyUngrab"]} { |
---|
124 | if {[string equal $tcl_platform(platform) "unix"]} { |
---|
125 | tk_menuSetFocus %W |
---|
126 | } |
---|
127 | } |
---|
128 | } |
---|
129 | tkMenuMotion %W %x %y %s |
---|
130 | } |
---|
131 | |
---|
132 | bind Menu <Leave> { |
---|
133 | tkMenuLeave %W %X %Y %s |
---|
134 | } |
---|
135 | bind Menu <Motion> { |
---|
136 | tkMenuMotion %W %x %y %s |
---|
137 | } |
---|
138 | bind Menu <ButtonPress> { |
---|
139 | tkMenuButtonDown %W |
---|
140 | } |
---|
141 | bind Menu <ButtonRelease> { |
---|
142 | tkMenuInvoke %W 1 |
---|
143 | } |
---|
144 | bind Menu <space> { |
---|
145 | tkMenuInvoke %W 0 |
---|
146 | } |
---|
147 | bind Menu <Return> { |
---|
148 | tkMenuInvoke %W 0 |
---|
149 | } |
---|
150 | bind Menu <Escape> { |
---|
151 | tkMenuEscape %W |
---|
152 | } |
---|
153 | bind Menu <Left> { |
---|
154 | tkMenuLeftArrow %W |
---|
155 | } |
---|
156 | bind Menu <Right> { |
---|
157 | tkMenuRightArrow %W |
---|
158 | } |
---|
159 | bind Menu <Up> { |
---|
160 | tkMenuUpArrow %W |
---|
161 | } |
---|
162 | bind Menu <Down> { |
---|
163 | tkMenuDownArrow %W |
---|
164 | } |
---|
165 | bind Menu <KeyPress> { |
---|
166 | tkTraverseWithinMenu %W %A |
---|
167 | } |
---|
168 | |
---|
169 | # The following bindings apply to all windows, and are used to |
---|
170 | # implement keyboard menu traversal. |
---|
171 | |
---|
172 | if {[string equal $tcl_platform(platform) "unix"]} { |
---|
173 | bind all <Alt-KeyPress> { |
---|
174 | tkTraverseToMenu %W %A |
---|
175 | } |
---|
176 | |
---|
177 | bind all <F10> { |
---|
178 | tkFirstMenu %W |
---|
179 | } |
---|
180 | } else { |
---|
181 | bind Menubutton <Alt-KeyPress> { |
---|
182 | tkTraverseToMenu %W %A |
---|
183 | } |
---|
184 | |
---|
185 | bind Menubutton <F10> { |
---|
186 | tkFirstMenu %W |
---|
187 | } |
---|
188 | } |
---|
189 | |
---|
190 | # tkMbEnter -- |
---|
191 | # This procedure is invoked when the mouse enters a menubutton |
---|
192 | # widget. It activates the widget unless it is disabled. Note: |
---|
193 | # this procedure is only invoked when mouse button 1 is *not* down. |
---|
194 | # The procedure tkMbB1Enter is invoked if the button is down. |
---|
195 | # |
---|
196 | # Arguments: |
---|
197 | # w - The name of the widget. |
---|
198 | |
---|
199 | proc tkMbEnter w { |
---|
200 | global tkPriv |
---|
201 | |
---|
202 | if {[string compare $tkPriv(inMenubutton) ""]} { |
---|
203 | tkMbLeave $tkPriv(inMenubutton) |
---|
204 | } |
---|
205 | set tkPriv(inMenubutton) $w |
---|
206 | if {[string compare [$w cget -state] "disabled"]} { |
---|
207 | $w configure -state active |
---|
208 | } |
---|
209 | } |
---|
210 | |
---|
211 | # tkMbLeave -- |
---|
212 | # This procedure is invoked when the mouse leaves a menubutton widget. |
---|
213 | # It de-activates the widget, if the widget still exists. |
---|
214 | # |
---|
215 | # Arguments: |
---|
216 | # w - The name of the widget. |
---|
217 | |
---|
218 | proc tkMbLeave w { |
---|
219 | global tkPriv |
---|
220 | |
---|
221 | set tkPriv(inMenubutton) {} |
---|
222 | if {![winfo exists $w]} { |
---|
223 | return |
---|
224 | } |
---|
225 | if {[string equal [$w cget -state] "active"]} { |
---|
226 | $w configure -state normal |
---|
227 | } |
---|
228 | } |
---|
229 | |
---|
230 | # tkMbPost -- |
---|
231 | # Given a menubutton, this procedure does all the work of posting |
---|
232 | # its associated menu and unposting any other menu that is currently |
---|
233 | # posted. |
---|
234 | # |
---|
235 | # Arguments: |
---|
236 | # w - The name of the menubutton widget whose menu |
---|
237 | # is to be posted. |
---|
238 | # x, y - Root coordinates of cursor, used for positioning |
---|
239 | # option menus. If not specified, then the center |
---|
240 | # of the menubutton is used for an option menu. |
---|
241 | |
---|
242 | proc tkMbPost {w {x {}} {y {}}} { |
---|
243 | global tkPriv errorInfo |
---|
244 | global tcl_platform |
---|
245 | |
---|
246 | if {[string equal [$w cget -state] "disabled"] || \ |
---|
247 | [string equal $w $tkPriv(postedMb)]} { |
---|
248 | return |
---|
249 | } |
---|
250 | set menu [$w cget -menu] |
---|
251 | if {[string equal $menu ""]} { |
---|
252 | return |
---|
253 | } |
---|
254 | set tearoff [expr {[string equal $tcl_platform(platform) "unix"] \ |
---|
255 | || [string equal [$menu cget -type] "tearoff"]}] |
---|
256 | if {[string first $w $menu] != 0} { |
---|
257 | error "can't post $menu: it isn't a descendant of $w (this is a new requirement in Tk versions 3.0 and later)" |
---|
258 | } |
---|
259 | set cur $tkPriv(postedMb) |
---|
260 | if {[string compare $cur ""]} { |
---|
261 | tkMenuUnpost {} |
---|
262 | } |
---|
263 | set tkPriv(cursor) [$w cget -cursor] |
---|
264 | set tkPriv(relief) [$w cget -relief] |
---|
265 | $w configure -cursor arrow |
---|
266 | $w configure -relief raised |
---|
267 | |
---|
268 | set tkPriv(postedMb) $w |
---|
269 | set tkPriv(focus) [focus] |
---|
270 | $menu activate none |
---|
271 | tkGenerateMenuSelect $menu |
---|
272 | |
---|
273 | # If this looks like an option menubutton then post the menu so |
---|
274 | # that the current entry is on top of the mouse. Otherwise post |
---|
275 | # the menu just below the menubutton, as for a pull-down. |
---|
276 | |
---|
277 | update idletasks |
---|
278 | if {[catch { |
---|
279 | switch [$w cget -direction] { |
---|
280 | above { |
---|
281 | set x [winfo rootx $w] |
---|
282 | set y [expr {[winfo rooty $w] - [winfo reqheight $menu]}] |
---|
283 | $menu post $x $y |
---|
284 | } |
---|
285 | below { |
---|
286 | set x [winfo rootx $w] |
---|
287 | set y [expr {[winfo rooty $w] + [winfo height $w]}] |
---|
288 | $menu post $x $y |
---|
289 | } |
---|
290 | left { |
---|
291 | set x [expr {[winfo rootx $w] - [winfo reqwidth $menu]}] |
---|
292 | set y [expr {(2 * [winfo rooty $w] + [winfo height $w]) / 2}] |
---|
293 | set entry [tkMenuFindName $menu [$w cget -text]] |
---|
294 | if {[$w cget -indicatoron]} { |
---|
295 | if {$entry == [$menu index last]} { |
---|
296 | incr y [expr {-([$menu yposition $entry] \ |
---|
297 | + [winfo reqheight $menu])/2}] |
---|
298 | } else { |
---|
299 | incr y [expr {-([$menu yposition $entry] \ |
---|
300 | + [$menu yposition [expr {$entry+1}]])/2}] |
---|
301 | } |
---|
302 | } |
---|
303 | $menu post $x $y |
---|
304 | if {[string compare $entry {}] && [string compare [$menu entrycget $entry -state] "disabled"]} { |
---|
305 | $menu activate $entry |
---|
306 | tkGenerateMenuSelect $menu |
---|
307 | } |
---|
308 | } |
---|
309 | right { |
---|
310 | set x [expr {[winfo rootx $w] + [winfo width $w]}] |
---|
311 | set y [expr {(2 * [winfo rooty $w] + [winfo height $w]) / 2}] |
---|
312 | set entry [tkMenuFindName $menu [$w cget -text]] |
---|
313 | if {[$w cget -indicatoron]} { |
---|
314 | if {$entry == [$menu index last]} { |
---|
315 | incr y [expr {-([$menu yposition $entry] \ |
---|
316 | + [winfo reqheight $menu])/2}] |
---|
317 | } else { |
---|
318 | incr y [expr {-([$menu yposition $entry] \ |
---|
319 | + [$menu yposition [expr {$entry+1}]])/2}] |
---|
320 | } |
---|
321 | } |
---|
322 | $menu post $x $y |
---|
323 | if {[string compare $entry {}] && [string compare [$menu entrycget $entry -state] "disabled"]} { |
---|
324 | $menu activate $entry |
---|
325 | tkGenerateMenuSelect $menu |
---|
326 | } |
---|
327 | } |
---|
328 | default { |
---|
329 | if {[$w cget -indicatoron]} { |
---|
330 | if {[string equal $y {}]} { |
---|
331 | set x [expr {[winfo rootx $w] + [winfo width $w]/2}] |
---|
332 | set y [expr {[winfo rooty $w] + [winfo height $w]/2}] |
---|
333 | } |
---|
334 | tkPostOverPoint $menu $x $y [tkMenuFindName $menu [$w cget -text]] |
---|
335 | } else { |
---|
336 | $menu post [winfo rootx $w] [expr {[winfo rooty $w]+[winfo height $w]}] |
---|
337 | } |
---|
338 | } |
---|
339 | } |
---|
340 | } msg]} { |
---|
341 | # Error posting menu (e.g. bogus -postcommand). Unpost it and |
---|
342 | # reflect the error. |
---|
343 | |
---|
344 | set savedInfo $errorInfo |
---|
345 | tkMenuUnpost {} |
---|
346 | error $msg $savedInfo |
---|
347 | |
---|
348 | } |
---|
349 | |
---|
350 | set tkPriv(tearoff) $tearoff |
---|
351 | if {$tearoff != 0} { |
---|
352 | focus $menu |
---|
353 | if {[winfo viewable $w]} { |
---|
354 | tkSaveGrabInfo $w |
---|
355 | grab -global $w |
---|
356 | } |
---|
357 | } |
---|
358 | } |
---|
359 | |
---|
360 | # tkMenuUnpost -- |
---|
361 | # This procedure unposts a given menu, plus all of its ancestors up |
---|
362 | # to (and including) a menubutton, if any. It also restores various |
---|
363 | # values to what they were before the menu was posted, and releases |
---|
364 | # a grab if there's a menubutton involved. Special notes: |
---|
365 | # 1. It's important to unpost all menus before releasing the grab, so |
---|
366 | # that any Enter-Leave events (e.g. from menu back to main |
---|
367 | # application) have mode NotifyGrab. |
---|
368 | # 2. Be sure to enclose various groups of commands in "catch" so that |
---|
369 | # the procedure will complete even if the menubutton or the menu |
---|
370 | # or the grab window has been deleted. |
---|
371 | # |
---|
372 | # Arguments: |
---|
373 | # menu - Name of a menu to unpost. Ignored if there |
---|
374 | # is a posted menubutton. |
---|
375 | |
---|
376 | proc tkMenuUnpost menu { |
---|
377 | global tcl_platform |
---|
378 | global tkPriv |
---|
379 | set mb $tkPriv(postedMb) |
---|
380 | |
---|
381 | # Restore focus right away (otherwise X will take focus away when |
---|
382 | # the menu is unmapped and under some window managers (e.g. olvwm) |
---|
383 | # we'll lose the focus completely). |
---|
384 | |
---|
385 | catch {focus $tkPriv(focus)} |
---|
386 | set tkPriv(focus) "" |
---|
387 | |
---|
388 | # Unpost menu(s) and restore some stuff that's dependent on |
---|
389 | # what was posted. |
---|
390 | |
---|
391 | catch { |
---|
392 | if {[string compare $mb ""]} { |
---|
393 | set menu [$mb cget -menu] |
---|
394 | $menu unpost |
---|
395 | set tkPriv(postedMb) {} |
---|
396 | $mb configure -cursor $tkPriv(cursor) |
---|
397 | $mb configure -relief $tkPriv(relief) |
---|
398 | } elseif {[string compare $tkPriv(popup) ""]} { |
---|
399 | $tkPriv(popup) unpost |
---|
400 | set tkPriv(popup) {} |
---|
401 | } elseif {[string compare [$menu cget -type] "menubar"] \ |
---|
402 | && [string compare [$menu cget -type] "tearoff"]} { |
---|
403 | # We're in a cascaded sub-menu from a torn-off menu or popup. |
---|
404 | # Unpost all the menus up to the toplevel one (but not |
---|
405 | # including the top-level torn-off one) and deactivate the |
---|
406 | # top-level torn off menu if there is one. |
---|
407 | |
---|
408 | while {1} { |
---|
409 | set parent [winfo parent $menu] |
---|
410 | if {[string compare [winfo class $parent] "Menu"] \ |
---|
411 | || ![winfo ismapped $parent]} { |
---|
412 | break |
---|
413 | } |
---|
414 | $parent activate none |
---|
415 | $parent postcascade none |
---|
416 | tkGenerateMenuSelect $parent |
---|
417 | set type [$parent cget -type] |
---|
418 | if {[string equal $type "menubar"] || \ |
---|
419 | [string equal $type "tearoff"]} { |
---|
420 | break |
---|
421 | } |
---|
422 | set menu $parent |
---|
423 | } |
---|
424 | if {[string compare [$menu cget -type] "menubar"]} { |
---|
425 | $menu unpost |
---|
426 | } |
---|
427 | } |
---|
428 | } |
---|
429 | |
---|
430 | if {($tkPriv(tearoff) != 0) || [string compare $tkPriv(menuBar) ""]} { |
---|
431 | # Release grab, if any, and restore the previous grab, if there |
---|
432 | # was one. |
---|
433 | if {[string compare $menu ""]} { |
---|
434 | set grab [grab current $menu] |
---|
435 | if {[string compare $grab ""]} { |
---|
436 | grab release $grab |
---|
437 | } |
---|
438 | } |
---|
439 | tkRestoreOldGrab |
---|
440 | if {[string compare $tkPriv(menuBar) ""]} { |
---|
441 | $tkPriv(menuBar) configure -cursor $tkPriv(cursor) |
---|
442 | set tkPriv(menuBar) {} |
---|
443 | } |
---|
444 | if {[string compare $tcl_platform(platform) "unix"]} { |
---|
445 | set tkPriv(tearoff) 0 |
---|
446 | } |
---|
447 | } |
---|
448 | } |
---|
449 | |
---|
450 | # tkMbMotion -- |
---|
451 | # This procedure handles mouse motion events inside menubuttons, and |
---|
452 | # also outside menubuttons when a menubutton has a grab (e.g. when a |
---|
453 | # menu selection operation is in progress). |
---|
454 | # |
---|
455 | # Arguments: |
---|
456 | # w - The name of the menubutton widget. |
---|
457 | # upDown - "down" means button 1 is pressed, "up" means |
---|
458 | # it isn't. |
---|
459 | # rootx, rooty - Coordinates of mouse, in (virtual?) root window. |
---|
460 | |
---|
461 | proc tkMbMotion {w upDown rootx rooty} { |
---|
462 | global tkPriv |
---|
463 | |
---|
464 | if {[string equal $tkPriv(inMenubutton) $w]} { |
---|
465 | return |
---|
466 | } |
---|
467 | set new [winfo containing $rootx $rooty] |
---|
468 | if {[string compare $new $tkPriv(inMenubutton)] \ |
---|
469 | && ([string equal $new ""] \ |
---|
470 | || [string equal [winfo toplevel $new] [winfo toplevel $w]])} { |
---|
471 | if {[string compare $tkPriv(inMenubutton) ""]} { |
---|
472 | tkMbLeave $tkPriv(inMenubutton) |
---|
473 | } |
---|
474 | if {[string compare $new ""] \ |
---|
475 | && [string equal [winfo class $new] "Menubutton"] \ |
---|
476 | && ([$new cget -indicatoron] == 0) \ |
---|
477 | && ([$w cget -indicatoron] == 0)} { |
---|
478 | if {[string equal $upDown "down"]} { |
---|
479 | tkMbPost $new $rootx $rooty |
---|
480 | } else { |
---|
481 | tkMbEnter $new |
---|
482 | } |
---|
483 | } |
---|
484 | } |
---|
485 | } |
---|
486 | |
---|
487 | # tkMbButtonUp -- |
---|
488 | # This procedure is invoked to handle button 1 releases for menubuttons. |
---|
489 | # If the release happens inside the menubutton then leave its menu |
---|
490 | # posted with element 0 activated. Otherwise, unpost the menu. |
---|
491 | # |
---|
492 | # Arguments: |
---|
493 | # w - The name of the menubutton widget. |
---|
494 | |
---|
495 | proc tkMbButtonUp w { |
---|
496 | global tkPriv |
---|
497 | global tcl_platform |
---|
498 | |
---|
499 | set menu [$w cget -menu] |
---|
500 | set tearoff [expr {[string equal $tcl_platform(platform) "unix"] || \ |
---|
501 | ([string compare $menu {}] && \ |
---|
502 | [string equal [$menu cget -type] "tearoff"])}] |
---|
503 | if {($tearoff != 0) && [string equal $tkPriv(postedMb) $w] \ |
---|
504 | && [string equal $tkPriv(inMenubutton) $w]} { |
---|
505 | tkMenuFirstEntry [$tkPriv(postedMb) cget -menu] |
---|
506 | } else { |
---|
507 | tkMenuUnpost {} |
---|
508 | } |
---|
509 | } |
---|
510 | |
---|
511 | # tkMenuMotion -- |
---|
512 | # This procedure is called to handle mouse motion events for menus. |
---|
513 | # It does two things. First, it resets the active element in the |
---|
514 | # menu, if the mouse is over the menu. Second, if a mouse button |
---|
515 | # is down, it posts and unposts cascade entries to match the mouse |
---|
516 | # position. |
---|
517 | # |
---|
518 | # Arguments: |
---|
519 | # menu - The menu window. |
---|
520 | # x - The x position of the mouse. |
---|
521 | # y - The y position of the mouse. |
---|
522 | # state - Modifier state (tells whether buttons are down). |
---|
523 | |
---|
524 | proc tkMenuMotion {menu x y state} { |
---|
525 | global tkPriv |
---|
526 | if {[string equal $menu $tkPriv(window)]} { |
---|
527 | if {[string equal [$menu cget -type] "menubar"]} { |
---|
528 | if {[info exists tkPriv(focus)] && \ |
---|
529 | [string compare $menu $tkPriv(focus)]} { |
---|
530 | $menu activate @$x,$y |
---|
531 | tkGenerateMenuSelect $menu |
---|
532 | } |
---|
533 | } else { |
---|
534 | $menu activate @$x,$y |
---|
535 | tkGenerateMenuSelect $menu |
---|
536 | } |
---|
537 | } |
---|
538 | if {($state & 0x1f00) != 0} { |
---|
539 | $menu postcascade active |
---|
540 | } |
---|
541 | } |
---|
542 | |
---|
543 | # tkMenuButtonDown -- |
---|
544 | # Handles button presses in menus. There are a couple of tricky things |
---|
545 | # here: |
---|
546 | # 1. Change the posted cascade entry (if any) to match the mouse position. |
---|
547 | # 2. If there is a posted menubutton, must grab to the menubutton; this |
---|
548 | # overrrides the implicit grab on button press, so that the menu |
---|
549 | # button can track mouse motions over other menubuttons and change |
---|
550 | # the posted menu. |
---|
551 | # 3. If there's no posted menubutton (e.g. because we're a torn-off menu |
---|
552 | # or one of its descendants) must grab to the top-level menu so that |
---|
553 | # we can track mouse motions across the entire menu hierarchy. |
---|
554 | # |
---|
555 | # Arguments: |
---|
556 | # menu - The menu window. |
---|
557 | |
---|
558 | proc tkMenuButtonDown menu { |
---|
559 | global tkPriv |
---|
560 | global tcl_platform |
---|
561 | |
---|
562 | if {![winfo viewable $menu]} { |
---|
563 | return |
---|
564 | } |
---|
565 | $menu postcascade active |
---|
566 | if {[string compare $tkPriv(postedMb) ""] && \ |
---|
567 | [winfo viewable $tkPriv(postedMb)]} { |
---|
568 | grab -global $tkPriv(postedMb) |
---|
569 | } else { |
---|
570 | while {[string equal [$menu cget -type] "normal"] \ |
---|
571 | && [string equal [winfo class [winfo parent $menu]] "Menu"] \ |
---|
572 | && [winfo ismapped [winfo parent $menu]]} { |
---|
573 | set menu [winfo parent $menu] |
---|
574 | } |
---|
575 | |
---|
576 | if {[string equal $tkPriv(menuBar) {}]} { |
---|
577 | set tkPriv(menuBar) $menu |
---|
578 | set tkPriv(cursor) [$menu cget -cursor] |
---|
579 | $menu configure -cursor arrow |
---|
580 | } |
---|
581 | |
---|
582 | # Don't update grab information if the grab window isn't changing. |
---|
583 | # Otherwise, we'll get an error when we unpost the menus and |
---|
584 | # restore the grab, since the old grab window will not be viewable |
---|
585 | # anymore. |
---|
586 | |
---|
587 | if {[string compare $menu [grab current $menu]]} { |
---|
588 | tkSaveGrabInfo $menu |
---|
589 | } |
---|
590 | |
---|
591 | # Must re-grab even if the grab window hasn't changed, in order |
---|
592 | # to release the implicit grab from the button press. |
---|
593 | |
---|
594 | if {[string equal $tcl_platform(platform) "unix"]} { |
---|
595 | grab -global $menu |
---|
596 | } |
---|
597 | } |
---|
598 | } |
---|
599 | |
---|
600 | # tkMenuLeave -- |
---|
601 | # This procedure is invoked to handle Leave events for a menu. It |
---|
602 | # deactivates everything unless the active element is a cascade element |
---|
603 | # and the mouse is now over the submenu. |
---|
604 | # |
---|
605 | # Arguments: |
---|
606 | # menu - The menu window. |
---|
607 | # rootx, rooty - Root coordinates of mouse. |
---|
608 | # state - Modifier state. |
---|
609 | |
---|
610 | proc tkMenuLeave {menu rootx rooty state} { |
---|
611 | global tkPriv |
---|
612 | set tkPriv(window) {} |
---|
613 | if {[string equal [$menu index active] "none"]} { |
---|
614 | return |
---|
615 | } |
---|
616 | if {[string equal [$menu type active] "cascade"] |
---|
617 | && [string equal [winfo containing $rootx $rooty] \ |
---|
618 | [$menu entrycget active -menu]]} { |
---|
619 | return |
---|
620 | } |
---|
621 | $menu activate none |
---|
622 | tkGenerateMenuSelect $menu |
---|
623 | } |
---|
624 | |
---|
625 | # tkMenuInvoke -- |
---|
626 | # This procedure is invoked when button 1 is released over a menu. |
---|
627 | # It invokes the appropriate menu action and unposts the menu if |
---|
628 | # it came from a menubutton. |
---|
629 | # |
---|
630 | # Arguments: |
---|
631 | # w - Name of the menu widget. |
---|
632 | # buttonRelease - 1 means this procedure is called because of |
---|
633 | # a button release; 0 means because of keystroke. |
---|
634 | |
---|
635 | proc tkMenuInvoke {w buttonRelease} { |
---|
636 | global tkPriv |
---|
637 | |
---|
638 | if {$buttonRelease && [string equal $tkPriv(window) {}]} { |
---|
639 | # Mouse was pressed over a menu without a menu button, then |
---|
640 | # dragged off the menu (possibly with a cascade posted) and |
---|
641 | # released. Unpost everything and quit. |
---|
642 | |
---|
643 | $w postcascade none |
---|
644 | $w activate none |
---|
645 | event generate $w <<MenuSelect>> |
---|
646 | tkMenuUnpost $w |
---|
647 | return |
---|
648 | } |
---|
649 | if {[string equal [$w type active] "cascade"]} { |
---|
650 | $w postcascade active |
---|
651 | set menu [$w entrycget active -menu] |
---|
652 | tkMenuFirstEntry $menu |
---|
653 | } elseif {[string equal [$w type active] "tearoff"]} { |
---|
654 | tkTearOffMenu $w |
---|
655 | tkMenuUnpost $w |
---|
656 | } elseif {[string equal [$w cget -type] "menubar"]} { |
---|
657 | $w postcascade none |
---|
658 | set active [$w index active] |
---|
659 | set isCascade [string equal [$w type $active] "cascade"] |
---|
660 | |
---|
661 | # Only de-activate the active item if it's a cascade; this prevents |
---|
662 | # the annoying "activation flicker" you otherwise get with |
---|
663 | # checkbuttons/commands/etc. on menubars |
---|
664 | |
---|
665 | if { $isCascade } { |
---|
666 | $w activate none |
---|
667 | event generate $w <<MenuSelect>> |
---|
668 | } |
---|
669 | |
---|
670 | tkMenuUnpost $w |
---|
671 | |
---|
672 | # If the active item is not a cascade, invoke it. This enables |
---|
673 | # the use of checkbuttons/commands/etc. on menubars (which is legal, |
---|
674 | # but not recommended) |
---|
675 | |
---|
676 | if { !$isCascade } { |
---|
677 | uplevel #0 [list $w invoke $active] |
---|
678 | } |
---|
679 | } else { |
---|
680 | tkMenuUnpost $w |
---|
681 | uplevel #0 [list $w invoke active] |
---|
682 | } |
---|
683 | } |
---|
684 | |
---|
685 | # tkMenuEscape -- |
---|
686 | # This procedure is invoked for the Cancel (or Escape) key. It unposts |
---|
687 | # the given menu and, if it is the top-level menu for a menu button, |
---|
688 | # unposts the menu button as well. |
---|
689 | # |
---|
690 | # Arguments: |
---|
691 | # menu - Name of the menu window. |
---|
692 | |
---|
693 | proc tkMenuEscape menu { |
---|
694 | set parent [winfo parent $menu] |
---|
695 | if {[string compare [winfo class $parent] "Menu"]} { |
---|
696 | tkMenuUnpost $menu |
---|
697 | } elseif {[string equal [$parent cget -type] "menubar"]} { |
---|
698 | tkMenuUnpost $menu |
---|
699 | tkRestoreOldGrab |
---|
700 | } else { |
---|
701 | tkMenuNextMenu $menu left |
---|
702 | } |
---|
703 | } |
---|
704 | |
---|
705 | # The following routines handle arrow keys. Arrow keys behave |
---|
706 | # differently depending on whether the menu is a menu bar or not. |
---|
707 | |
---|
708 | proc tkMenuUpArrow {menu} { |
---|
709 | if {[string equal [$menu cget -type] "menubar"]} { |
---|
710 | tkMenuNextMenu $menu left |
---|
711 | } else { |
---|
712 | tkMenuNextEntry $menu -1 |
---|
713 | } |
---|
714 | } |
---|
715 | |
---|
716 | proc tkMenuDownArrow {menu} { |
---|
717 | if {[string equal [$menu cget -type] "menubar"]} { |
---|
718 | tkMenuNextMenu $menu right |
---|
719 | } else { |
---|
720 | tkMenuNextEntry $menu 1 |
---|
721 | } |
---|
722 | } |
---|
723 | |
---|
724 | proc tkMenuLeftArrow {menu} { |
---|
725 | if {[string equal [$menu cget -type] "menubar"]} { |
---|
726 | tkMenuNextEntry $menu -1 |
---|
727 | } else { |
---|
728 | tkMenuNextMenu $menu left |
---|
729 | } |
---|
730 | } |
---|
731 | |
---|
732 | proc tkMenuRightArrow {menu} { |
---|
733 | if {[string equal [$menu cget -type] "menubar"]} { |
---|
734 | tkMenuNextEntry $menu 1 |
---|
735 | } else { |
---|
736 | tkMenuNextMenu $menu right |
---|
737 | } |
---|
738 | } |
---|
739 | |
---|
740 | # tkMenuNextMenu -- |
---|
741 | # This procedure is invoked to handle "left" and "right" traversal |
---|
742 | # motions in menus. It traverses to the next menu in a menu bar, |
---|
743 | # or into or out of a cascaded menu. |
---|
744 | # |
---|
745 | # Arguments: |
---|
746 | # menu - The menu that received the keyboard |
---|
747 | # event. |
---|
748 | # direction - Direction in which to move: "left" or "right" |
---|
749 | |
---|
750 | proc tkMenuNextMenu {menu direction} { |
---|
751 | global tkPriv |
---|
752 | |
---|
753 | # First handle traversals into and out of cascaded menus. |
---|
754 | |
---|
755 | if {[string equal $direction "right"]} { |
---|
756 | set count 1 |
---|
757 | set parent [winfo parent $menu] |
---|
758 | set class [winfo class $parent] |
---|
759 | if {[string equal [$menu type active] "cascade"]} { |
---|
760 | $menu postcascade active |
---|
761 | set m2 [$menu entrycget active -menu] |
---|
762 | if {[string compare $m2 ""]} { |
---|
763 | tkMenuFirstEntry $m2 |
---|
764 | } |
---|
765 | return |
---|
766 | } else { |
---|
767 | set parent [winfo parent $menu] |
---|
768 | while {[string compare $parent "."]} { |
---|
769 | if {[string equal [winfo class $parent] "Menu"] \ |
---|
770 | && [string equal [$parent cget -type] "menubar"]} { |
---|
771 | tk_menuSetFocus $parent |
---|
772 | tkMenuNextEntry $parent 1 |
---|
773 | return |
---|
774 | } |
---|
775 | set parent [winfo parent $parent] |
---|
776 | } |
---|
777 | } |
---|
778 | } else { |
---|
779 | set count -1 |
---|
780 | set m2 [winfo parent $menu] |
---|
781 | if {[string equal [winfo class $m2] "Menu"]} { |
---|
782 | if {[string compare [$m2 cget -type] "menubar"]} { |
---|
783 | $menu activate none |
---|
784 | tkGenerateMenuSelect $menu |
---|
785 | tk_menuSetFocus $m2 |
---|
786 | |
---|
787 | # This code unposts any posted submenu in the parent. |
---|
788 | |
---|
789 | set tmp [$m2 index active] |
---|
790 | $m2 activate none |
---|
791 | $m2 activate $tmp |
---|
792 | return |
---|
793 | } |
---|
794 | } |
---|
795 | } |
---|
796 | |
---|
797 | # Can't traverse into or out of a cascaded menu. Go to the next |
---|
798 | # or previous menubutton, if that makes sense. |
---|
799 | |
---|
800 | set m2 [winfo parent $menu] |
---|
801 | if {[string equal [winfo class $m2] "Menu"]} { |
---|
802 | if {[string equal [$m2 cget -type] "menubar"]} { |
---|
803 | tk_menuSetFocus $m2 |
---|
804 | tkMenuNextEntry $m2 -1 |
---|
805 | return |
---|
806 | } |
---|
807 | } |
---|
808 | |
---|
809 | set w $tkPriv(postedMb) |
---|
810 | if {[string equal $w ""]} { |
---|
811 | return |
---|
812 | } |
---|
813 | set buttons [winfo children [winfo parent $w]] |
---|
814 | set length [llength $buttons] |
---|
815 | set i [expr {[lsearch -exact $buttons $w] + $count}] |
---|
816 | while {1} { |
---|
817 | while {$i < 0} { |
---|
818 | incr i $length |
---|
819 | } |
---|
820 | while {$i >= $length} { |
---|
821 | incr i -$length |
---|
822 | } |
---|
823 | set mb [lindex $buttons $i] |
---|
824 | if {[string equal [winfo class $mb] "Menubutton"] \ |
---|
825 | && [string compare [$mb cget -state] "disabled"] \ |
---|
826 | && [string compare [$mb cget -menu] ""] \ |
---|
827 | && [string compare [[$mb cget -menu] index last] "none"]} { |
---|
828 | break |
---|
829 | } |
---|
830 | if {[string equal $mb $w]} { |
---|
831 | return |
---|
832 | } |
---|
833 | incr i $count |
---|
834 | } |
---|
835 | tkMbPost $mb |
---|
836 | tkMenuFirstEntry [$mb cget -menu] |
---|
837 | } |
---|
838 | |
---|
839 | # tkMenuNextEntry -- |
---|
840 | # Activate the next higher or lower entry in the posted menu, |
---|
841 | # wrapping around at the ends. Disabled entries are skipped. |
---|
842 | # |
---|
843 | # Arguments: |
---|
844 | # menu - Menu window that received the keystroke. |
---|
845 | # count - 1 means go to the next lower entry, |
---|
846 | # -1 means go to the next higher entry. |
---|
847 | |
---|
848 | proc tkMenuNextEntry {menu count} { |
---|
849 | global tkPriv |
---|
850 | |
---|
851 | if {[string equal [$menu index last] "none"]} { |
---|
852 | return |
---|
853 | } |
---|
854 | set length [expr {[$menu index last]+1}] |
---|
855 | set quitAfter $length |
---|
856 | set active [$menu index active] |
---|
857 | if {[string equal $active "none"]} { |
---|
858 | set i 0 |
---|
859 | } else { |
---|
860 | set i [expr {$active + $count}] |
---|
861 | } |
---|
862 | while {1} { |
---|
863 | if {$quitAfter <= 0} { |
---|
864 | # We've tried every entry in the menu. Either there are |
---|
865 | # none, or they're all disabled. Just give up. |
---|
866 | |
---|
867 | return |
---|
868 | } |
---|
869 | while {$i < 0} { |
---|
870 | incr i $length |
---|
871 | } |
---|
872 | while {$i >= $length} { |
---|
873 | incr i -$length |
---|
874 | } |
---|
875 | if {[catch {$menu entrycget $i -state} state] == 0} { |
---|
876 | if {[string compare $state "disabled"]} { |
---|
877 | break |
---|
878 | } |
---|
879 | } |
---|
880 | if {$i == $active} { |
---|
881 | return |
---|
882 | } |
---|
883 | incr i $count |
---|
884 | incr quitAfter -1 |
---|
885 | } |
---|
886 | $menu activate $i |
---|
887 | tkGenerateMenuSelect $menu |
---|
888 | if {[string equal [$menu type $i] "cascade"]} { |
---|
889 | set cascade [$menu entrycget $i -menu] |
---|
890 | if {[string compare $cascade ""]} { |
---|
891 | # Here we auto-post a cascade. This is necessary when |
---|
892 | # we traverse left/right in the menubar, but undesirable when |
---|
893 | # we traverse up/down in a menu. |
---|
894 | $menu postcascade $i |
---|
895 | tkMenuFirstEntry $cascade |
---|
896 | } |
---|
897 | } |
---|
898 | } |
---|
899 | |
---|
900 | # tkMenuFind -- |
---|
901 | # This procedure searches the entire window hierarchy under w for |
---|
902 | # a menubutton that isn't disabled and whose underlined character |
---|
903 | # is "char" or an entry in a menubar that isn't disabled and whose |
---|
904 | # underlined character is "char". |
---|
905 | # It returns the name of that window, if found, or an |
---|
906 | # empty string if no matching window was found. If "char" is an |
---|
907 | # empty string then the procedure returns the name of the first |
---|
908 | # menubutton found that isn't disabled. |
---|
909 | # |
---|
910 | # Arguments: |
---|
911 | # w - Name of window where key was typed. |
---|
912 | # char - Underlined character to search for; |
---|
913 | # may be either upper or lower case, and |
---|
914 | # will match either upper or lower case. |
---|
915 | |
---|
916 | proc tkMenuFind {w char} { |
---|
917 | global tkPriv |
---|
918 | set char [string tolower $char] |
---|
919 | set windowlist [winfo child $w] |
---|
920 | |
---|
921 | foreach child $windowlist { |
---|
922 | # Don't descend into other toplevels. |
---|
923 | if {[string compare [winfo toplevel [focus]] \ |
---|
924 | [winfo toplevel $child]]} { |
---|
925 | continue |
---|
926 | } |
---|
927 | if {[string equal [winfo class $child] "Menu"] && \ |
---|
928 | [string equal [$child cget -type] "menubar"]} { |
---|
929 | if {[string equal $char ""]} { |
---|
930 | return $child |
---|
931 | } |
---|
932 | set last [$child index last] |
---|
933 | for {set i [$child cget -tearoff]} {$i <= $last} {incr i} { |
---|
934 | if {[string equal [$child type $i] "separator"]} { |
---|
935 | continue |
---|
936 | } |
---|
937 | set char2 [string index [$child entrycget $i -label] \ |
---|
938 | [$child entrycget $i -underline]] |
---|
939 | if {[string equal $char [string tolower $char2]] \ |
---|
940 | || [string equal $char ""]} { |
---|
941 | if {[string compare [$child entrycget $i -state] "disabled"]} { |
---|
942 | return $child |
---|
943 | } |
---|
944 | } |
---|
945 | } |
---|
946 | } |
---|
947 | } |
---|
948 | |
---|
949 | foreach child $windowlist { |
---|
950 | # Don't descend into other toplevels. |
---|
951 | if {[string compare [winfo toplevel [focus]] \ |
---|
952 | [winfo toplevel $child]]} { |
---|
953 | continue |
---|
954 | } |
---|
955 | switch [winfo class $child] { |
---|
956 | Menubutton { |
---|
957 | set char2 [string index [$child cget -text] \ |
---|
958 | [$child cget -underline]] |
---|
959 | if {[string equal $char [string tolower $char2]] \ |
---|
960 | || [string equal $char ""]} { |
---|
961 | if {[string compare [$child cget -state] "disabled"]} { |
---|
962 | return $child |
---|
963 | } |
---|
964 | } |
---|
965 | } |
---|
966 | |
---|
967 | default { |
---|
968 | set match [tkMenuFind $child $char] |
---|
969 | if {[string compare $match ""]} { |
---|
970 | return $match |
---|
971 | } |
---|
972 | } |
---|
973 | } |
---|
974 | } |
---|
975 | return {} |
---|
976 | } |
---|
977 | |
---|
978 | # tkTraverseToMenu -- |
---|
979 | # This procedure implements keyboard traversal of menus. Given an |
---|
980 | # ASCII character "char", it looks for a menubutton with that character |
---|
981 | # underlined. If one is found, it posts the menubutton's menu |
---|
982 | # |
---|
983 | # Arguments: |
---|
984 | # w - Window in which the key was typed (selects |
---|
985 | # a toplevel window). |
---|
986 | # char - Character that selects a menu. The case |
---|
987 | # is ignored. If an empty string, nothing |
---|
988 | # happens. |
---|
989 | |
---|
990 | proc tkTraverseToMenu {w char} { |
---|
991 | global tkPriv |
---|
992 | if {[string equal $char ""]} { |
---|
993 | return |
---|
994 | } |
---|
995 | while {[string equal [winfo class $w] "Menu"]} { |
---|
996 | if {[string compare [$w cget -type] "menubar"] \ |
---|
997 | && [string equal $tkPriv(postedMb) ""]} { |
---|
998 | return |
---|
999 | } |
---|
1000 | if {[string equal [$w cget -type] "menubar"]} { |
---|
1001 | break |
---|
1002 | } |
---|
1003 | set w [winfo parent $w] |
---|
1004 | } |
---|
1005 | set w [tkMenuFind [winfo toplevel $w] $char] |
---|
1006 | if {[string compare $w ""]} { |
---|
1007 | if {[string equal [winfo class $w] "Menu"]} { |
---|
1008 | tk_menuSetFocus $w |
---|
1009 | set tkPriv(window) $w |
---|
1010 | tkSaveGrabInfo $w |
---|
1011 | grab -global $w |
---|
1012 | tkTraverseWithinMenu $w $char |
---|
1013 | } else { |
---|
1014 | tkMbPost $w |
---|
1015 | tkMenuFirstEntry [$w cget -menu] |
---|
1016 | } |
---|
1017 | } |
---|
1018 | } |
---|
1019 | |
---|
1020 | # tkFirstMenu -- |
---|
1021 | # This procedure traverses to the first menubutton in the toplevel |
---|
1022 | # for a given window, and posts that menubutton's menu. |
---|
1023 | # |
---|
1024 | # Arguments: |
---|
1025 | # w - Name of a window. Selects which toplevel |
---|
1026 | # to search for menubuttons. |
---|
1027 | |
---|
1028 | proc tkFirstMenu w { |
---|
1029 | set w [tkMenuFind [winfo toplevel $w] ""] |
---|
1030 | if {[string compare $w ""]} { |
---|
1031 | if {[string equal [winfo class $w] "Menu"]} { |
---|
1032 | tk_menuSetFocus $w |
---|
1033 | set tkPriv(window) $w |
---|
1034 | tkSaveGrabInfo $w |
---|
1035 | grab -global $w |
---|
1036 | tkMenuFirstEntry $w |
---|
1037 | } else { |
---|
1038 | tkMbPost $w |
---|
1039 | tkMenuFirstEntry [$w cget -menu] |
---|
1040 | } |
---|
1041 | } |
---|
1042 | } |
---|
1043 | |
---|
1044 | # tkTraverseWithinMenu |
---|
1045 | # This procedure implements keyboard traversal within a menu. It |
---|
1046 | # searches for an entry in the menu that has "char" underlined. If |
---|
1047 | # such an entry is found, it is invoked and the menu is unposted. |
---|
1048 | # |
---|
1049 | # Arguments: |
---|
1050 | # w - The name of the menu widget. |
---|
1051 | # char - The character to look for; case is |
---|
1052 | # ignored. If the string is empty then |
---|
1053 | # nothing happens. |
---|
1054 | |
---|
1055 | proc tkTraverseWithinMenu {w char} { |
---|
1056 | if {[string equal $char ""]} { |
---|
1057 | return |
---|
1058 | } |
---|
1059 | set char [string tolower $char] |
---|
1060 | set last [$w index last] |
---|
1061 | if {[string equal $last "none"]} { |
---|
1062 | return |
---|
1063 | } |
---|
1064 | for {set i 0} {$i <= $last} {incr i} { |
---|
1065 | if {[catch {set char2 [string index \ |
---|
1066 | [$w entrycget $i -label] [$w entrycget $i -underline]]}]} { |
---|
1067 | continue |
---|
1068 | } |
---|
1069 | if {[string equal $char [string tolower $char2]]} { |
---|
1070 | if {[string equal [$w type $i] "cascade"]} { |
---|
1071 | $w activate $i |
---|
1072 | $w postcascade active |
---|
1073 | event generate $w <<MenuSelect>> |
---|
1074 | set m2 [$w entrycget $i -menu] |
---|
1075 | if {[string compare $m2 ""]} { |
---|
1076 | tkMenuFirstEntry $m2 |
---|
1077 | } |
---|
1078 | } else { |
---|
1079 | tkMenuUnpost $w |
---|
1080 | uplevel #0 [list $w invoke $i] |
---|
1081 | } |
---|
1082 | return |
---|
1083 | } |
---|
1084 | } |
---|
1085 | } |
---|
1086 | |
---|
1087 | # tkMenuFirstEntry -- |
---|
1088 | # Given a menu, this procedure finds the first entry that isn't |
---|
1089 | # disabled or a tear-off or separator, and activates that entry. |
---|
1090 | # However, if there is already an active entry in the menu (e.g., |
---|
1091 | # because of a previous call to tkPostOverPoint) then the active |
---|
1092 | # entry isn't changed. This procedure also sets the input focus |
---|
1093 | # to the menu. |
---|
1094 | # |
---|
1095 | # Arguments: |
---|
1096 | # menu - Name of the menu window (possibly empty). |
---|
1097 | |
---|
1098 | proc tkMenuFirstEntry menu { |
---|
1099 | if {[string equal $menu ""]} { |
---|
1100 | return |
---|
1101 | } |
---|
1102 | tk_menuSetFocus $menu |
---|
1103 | if {[string compare [$menu index active] "none"]} { |
---|
1104 | return |
---|
1105 | } |
---|
1106 | set last [$menu index last] |
---|
1107 | if {[string equal $last "none"]} { |
---|
1108 | return |
---|
1109 | } |
---|
1110 | for {set i 0} {$i <= $last} {incr i} { |
---|
1111 | if {([catch {set state [$menu entrycget $i -state]}] == 0) \ |
---|
1112 | && [string compare $state "disabled"] \ |
---|
1113 | && [string compare [$menu type $i] "tearoff"]} { |
---|
1114 | $menu activate $i |
---|
1115 | tkGenerateMenuSelect $menu |
---|
1116 | # Only post the cascade if the current menu is a menubar; |
---|
1117 | # otherwise, if the first entry of the cascade is a cascade, |
---|
1118 | # we can get an annoying cascading effect resulting in a bunch of |
---|
1119 | # menus getting posted (bug 676) |
---|
1120 | if {[string equal [$menu type $i] "cascade"] && \ |
---|
1121 | [string equal [$menu cget -type] "menubar"]} { |
---|
1122 | set cascade [$menu entrycget $i -menu] |
---|
1123 | if {[string compare $cascade ""]} { |
---|
1124 | $menu postcascade $i |
---|
1125 | tkMenuFirstEntry $cascade |
---|
1126 | } |
---|
1127 | } |
---|
1128 | return |
---|
1129 | } |
---|
1130 | } |
---|
1131 | } |
---|
1132 | |
---|
1133 | # tkMenuFindName -- |
---|
1134 | # Given a menu and a text string, return the index of the menu entry |
---|
1135 | # that displays the string as its label. If there is no such entry, |
---|
1136 | # return an empty string. This procedure is tricky because some names |
---|
1137 | # like "active" have a special meaning in menu commands, so we can't |
---|
1138 | # always use the "index" widget command. |
---|
1139 | # |
---|
1140 | # Arguments: |
---|
1141 | # menu - Name of the menu widget. |
---|
1142 | # s - String to look for. |
---|
1143 | |
---|
1144 | proc tkMenuFindName {menu s} { |
---|
1145 | set i "" |
---|
1146 | if {![regexp {^active$|^last$|^none$|^[0-9]|^@} $s]} { |
---|
1147 | catch {set i [$menu index $s]} |
---|
1148 | return $i |
---|
1149 | } |
---|
1150 | set last [$menu index last] |
---|
1151 | if {[string equal $last "none"]} { |
---|
1152 | return |
---|
1153 | } |
---|
1154 | for {set i 0} {$i <= $last} {incr i} { |
---|
1155 | if {![catch {$menu entrycget $i -label} label]} { |
---|
1156 | if {[string equal $label $s]} { |
---|
1157 | return $i |
---|
1158 | } |
---|
1159 | } |
---|
1160 | } |
---|
1161 | return "" |
---|
1162 | } |
---|
1163 | |
---|
1164 | # tkPostOverPoint -- |
---|
1165 | # This procedure posts a given menu such that a given entry in the |
---|
1166 | # menu is centered over a given point in the root window. It also |
---|
1167 | # activates the given entry. |
---|
1168 | # |
---|
1169 | # Arguments: |
---|
1170 | # menu - Menu to post. |
---|
1171 | # x, y - Root coordinates of point. |
---|
1172 | # entry - Index of entry within menu to center over (x,y). |
---|
1173 | # If omitted or specified as {}, then the menu's |
---|
1174 | # upper-left corner goes at (x,y). |
---|
1175 | |
---|
1176 | proc tkPostOverPoint {menu x y {entry {}}} { |
---|
1177 | global tcl_platform |
---|
1178 | |
---|
1179 | if {[string compare $entry {}]} { |
---|
1180 | if {$entry == [$menu index last]} { |
---|
1181 | incr y [expr {-([$menu yposition $entry] \ |
---|
1182 | + [winfo reqheight $menu])/2}] |
---|
1183 | } else { |
---|
1184 | incr y [expr {-([$menu yposition $entry] \ |
---|
1185 | + [$menu yposition [expr {$entry+1}]])/2}] |
---|
1186 | } |
---|
1187 | incr x [expr {-[winfo reqwidth $menu]/2}] |
---|
1188 | } |
---|
1189 | $menu post $x $y |
---|
1190 | if {[string compare $entry {}] \ |
---|
1191 | && [string compare [$menu entrycget $entry -state] "disabled"]} { |
---|
1192 | $menu activate $entry |
---|
1193 | tkGenerateMenuSelect $menu |
---|
1194 | } |
---|
1195 | } |
---|
1196 | |
---|
1197 | # tkSaveGrabInfo -- |
---|
1198 | # Sets the variables tkPriv(oldGrab) and tkPriv(grabStatus) to record |
---|
1199 | # the state of any existing grab on the w's display. |
---|
1200 | # |
---|
1201 | # Arguments: |
---|
1202 | # w - Name of a window; used to select the display |
---|
1203 | # whose grab information is to be recorded. |
---|
1204 | |
---|
1205 | proc tkSaveGrabInfo w { |
---|
1206 | global tkPriv |
---|
1207 | set tkPriv(oldGrab) [grab current $w] |
---|
1208 | if {[string compare $tkPriv(oldGrab) ""]} { |
---|
1209 | set tkPriv(grabStatus) [grab status $tkPriv(oldGrab)] |
---|
1210 | } |
---|
1211 | } |
---|
1212 | |
---|
1213 | # tkRestoreOldGrab -- |
---|
1214 | # Restores the grab to what it was before TkSaveGrabInfo was called. |
---|
1215 | # |
---|
1216 | |
---|
1217 | proc tkRestoreOldGrab {} { |
---|
1218 | global tkPriv |
---|
1219 | |
---|
1220 | if {[string compare $tkPriv(oldGrab) ""]} { |
---|
1221 | |
---|
1222 | # Be careful restoring the old grab, since it's window may not |
---|
1223 | # be visible anymore. |
---|
1224 | |
---|
1225 | catch { |
---|
1226 | if {[string equal $tkPriv(grabStatus) "global"]} { |
---|
1227 | grab set -global $tkPriv(oldGrab) |
---|
1228 | } else { |
---|
1229 | grab set $tkPriv(oldGrab) |
---|
1230 | } |
---|
1231 | } |
---|
1232 | set tkPriv(oldGrab) "" |
---|
1233 | } |
---|
1234 | } |
---|
1235 | |
---|
1236 | proc tk_menuSetFocus {menu} { |
---|
1237 | global tkPriv |
---|
1238 | if {![info exists tkPriv(focus)] || [string equal $tkPriv(focus) {}]} { |
---|
1239 | set tkPriv(focus) [focus] |
---|
1240 | } |
---|
1241 | focus $menu |
---|
1242 | } |
---|
1243 | |
---|
1244 | proc tkGenerateMenuSelect {menu} { |
---|
1245 | global tkPriv |
---|
1246 | |
---|
1247 | if {[string equal $tkPriv(activeMenu) $menu] \ |
---|
1248 | && [string equal $tkPriv(activeItem) [$menu index active]]} { |
---|
1249 | return |
---|
1250 | } |
---|
1251 | |
---|
1252 | set tkPriv(activeMenu) $menu |
---|
1253 | set tkPriv(activeItem) [$menu index active] |
---|
1254 | event generate $menu <<MenuSelect>> |
---|
1255 | } |
---|
1256 | |
---|
1257 | # tk_popup -- |
---|
1258 | # This procedure pops up a menu and sets things up for traversing |
---|
1259 | # the menu and its submenus. |
---|
1260 | # |
---|
1261 | # Arguments: |
---|
1262 | # menu - Name of the menu to be popped up. |
---|
1263 | # x, y - Root coordinates at which to pop up the |
---|
1264 | # menu. |
---|
1265 | # entry - Index of a menu entry to center over (x,y). |
---|
1266 | # If omitted or specified as {}, then menu's |
---|
1267 | # upper-left corner goes at (x,y). |
---|
1268 | |
---|
1269 | proc tk_popup {menu x y {entry {}}} { |
---|
1270 | global tkPriv |
---|
1271 | global tcl_platform |
---|
1272 | if {[string compare $tkPriv(popup) ""] \ |
---|
1273 | || [string compare $tkPriv(postedMb) ""]} { |
---|
1274 | tkMenuUnpost {} |
---|
1275 | } |
---|
1276 | tkPostOverPoint $menu $x $y $entry |
---|
1277 | if {[string equal $tcl_platform(platform) "unix"] \ |
---|
1278 | && [winfo viewable $menu]} { |
---|
1279 | tkSaveGrabInfo $menu |
---|
1280 | grab -global $menu |
---|
1281 | set tkPriv(popup) $menu |
---|
1282 | tk_menuSetFocus $menu |
---|
1283 | } |
---|
1284 | } |
---|