1 | # ---------------------------------------------------------------------- |
---|
2 | # COMPONENT: Radiodial - selector, like the dial on a car radio |
---|
3 | # |
---|
4 | # This widget looks like the dial on an old-fashioned car radio. |
---|
5 | # It draws a series of values along an axis, and allows a selector |
---|
6 | # to move back and forth to select the values. |
---|
7 | # ====================================================================== |
---|
8 | # AUTHOR: Michael McLennan, Purdue University |
---|
9 | # Copyright (c) 2004-2005 |
---|
10 | # Purdue Research Foundation, West Lafayette, IN |
---|
11 | # ====================================================================== |
---|
12 | package require Itk |
---|
13 | |
---|
14 | option add *Radiodial.thickness 10 widgetDefault |
---|
15 | option add *Radiodial.length 2i widgetDefault |
---|
16 | option add *Radiodial.dialOutlineColor black widgetDefault |
---|
17 | option add *Radiodial.dialFillColor white widgetDefault |
---|
18 | option add *Radiodial.lineColor gray widgetDefault |
---|
19 | option add *Radiodial.activeLineColor red widgetDefault |
---|
20 | option add *Radiodial.valueWidth 10 widgetDefault |
---|
21 | option add *Radiodial.font \ |
---|
22 | -*-helvetica-medium-r-normal-*-*-120-* widgetDefault |
---|
23 | |
---|
24 | itcl::class Rappture::Radiodial { |
---|
25 | inherit itk::Widget |
---|
26 | |
---|
27 | itk_option define -min min Min "" |
---|
28 | itk_option define -max max Max "" |
---|
29 | itk_option define -thickness thickness Thickness 0 |
---|
30 | itk_option define -length length Length 0 |
---|
31 | |
---|
32 | itk_option define -dialoutlinecolor dialOutlineColor Color "black" |
---|
33 | itk_option define -dialfillcolor dialFillColor Color "white" |
---|
34 | itk_option define -linecolor lineColor Color "black" |
---|
35 | itk_option define -activelinecolor activeLineColor Color "black" |
---|
36 | |
---|
37 | itk_option define -font font Font "" |
---|
38 | itk_option define -valuewidth valueWidth ValueWidth 0 |
---|
39 | |
---|
40 | |
---|
41 | constructor {args} { # defined below } |
---|
42 | destructor { # defined below } |
---|
43 | |
---|
44 | public method add {label {value ""}} |
---|
45 | public method clear {} |
---|
46 | public method get {args} |
---|
47 | public method current {args} |
---|
48 | public method color {value} |
---|
49 | |
---|
50 | protected method _redraw {} |
---|
51 | protected method _click {x y} |
---|
52 | protected method _navigate {offset} |
---|
53 | protected method _limits {} |
---|
54 | protected method _fixSize {} |
---|
55 | |
---|
56 | private variable _values "" ;# list of all values on the dial |
---|
57 | private variable _val2label ;# maps value => label |
---|
58 | private variable _current "" ;# current value (where pointer is) |
---|
59 | |
---|
60 | private variable _spectrum "" ;# width allocated for values |
---|
61 | private variable _activecolor "" ;# width allocated for values |
---|
62 | private variable _vwidth 0 ;# width allocated for values |
---|
63 | |
---|
64 | # |
---|
65 | # Load the image for the knob. |
---|
66 | # |
---|
67 | private common images |
---|
68 | set images(knob) [image create photo -data { |
---|
69 | R0lGODlhCQAMAMIEAAQCBJyanNza3Pz+/P///////////////yH5BAEKAAQALAAAAAAJAAwAAAMj |
---|
70 | SEqwDqO9MYJkVASLh/gbAHmgNX6amZXimrbVFkKyLN44kAAAOw== |
---|
71 | }] |
---|
72 | } |
---|
73 | |
---|
74 | itk::usual Radiodial { |
---|
75 | } |
---|
76 | |
---|
77 | # ---------------------------------------------------------------------- |
---|
78 | # CONSTRUCTOR |
---|
79 | # ---------------------------------------------------------------------- |
---|
80 | itcl::body Rappture::Radiodial::constructor {args} { |
---|
81 | itk_component add dial { |
---|
82 | canvas $itk_interior.dial |
---|
83 | } |
---|
84 | pack $itk_component(dial) -expand yes -fill both |
---|
85 | bind $itk_component(dial) <Configure> [itcl::code $this _redraw] |
---|
86 | |
---|
87 | bind $itk_component(dial) <ButtonPress-1> [itcl::code $this _click %x %y] |
---|
88 | bind $itk_component(dial) <B1-Motion> [itcl::code $this _click %x %y] |
---|
89 | bind $itk_component(dial) <ButtonRelease-1> [itcl::code $this _click %x %y] |
---|
90 | |
---|
91 | bind $itk_component(hull) <KeyPress-Left> [itcl::code $this _navigate -1] |
---|
92 | bind $itk_component(hull) <KeyPress-Right> [itcl::code $this _navigate 1] |
---|
93 | |
---|
94 | eval itk_initialize $args |
---|
95 | |
---|
96 | _fixSize |
---|
97 | } |
---|
98 | |
---|
99 | # ---------------------------------------------------------------------- |
---|
100 | # DESTRUCTOR |
---|
101 | # ---------------------------------------------------------------------- |
---|
102 | itcl::body Rappture::Radiodial::destructor {} { |
---|
103 | after cancel [itcl::code $this _redraw] |
---|
104 | } |
---|
105 | |
---|
106 | # ---------------------------------------------------------------------- |
---|
107 | # USAGE: add <label> ?<value>? |
---|
108 | # |
---|
109 | # Clients use this to add new values to the dial. Values are always |
---|
110 | # sorted in order along the dial. If the value is not specified, |
---|
111 | # then it is created automatically based on the number of elements |
---|
112 | # on the dial. |
---|
113 | # ---------------------------------------------------------------------- |
---|
114 | itcl::body Rappture::Radiodial::add {label {value ""}} { |
---|
115 | if {"" == $value} { |
---|
116 | set value [llength $_values] |
---|
117 | } |
---|
118 | lappend _values $value |
---|
119 | set _values [lsort -real $_values] |
---|
120 | set _val2label($value) $label |
---|
121 | |
---|
122 | if {"" == $_current} { |
---|
123 | set _current $value |
---|
124 | } |
---|
125 | |
---|
126 | after cancel [itcl::code $this _redraw] |
---|
127 | after idle [itcl::code $this _redraw] |
---|
128 | } |
---|
129 | |
---|
130 | # ---------------------------------------------------------------------- |
---|
131 | # USAGE: clear |
---|
132 | # |
---|
133 | # Clients use this to remove all existing values from the dial. |
---|
134 | # ---------------------------------------------------------------------- |
---|
135 | itcl::body Rappture::Radiodial::clear {} { |
---|
136 | set _values "" |
---|
137 | set _current "" |
---|
138 | catch {unset _val2label} |
---|
139 | |
---|
140 | after cancel [itcl::code $this _redraw] |
---|
141 | after idle [itcl::code $this _redraw] |
---|
142 | } |
---|
143 | |
---|
144 | # ---------------------------------------------------------------------- |
---|
145 | # USAGE: get ?-format what? ?current|@index? |
---|
146 | # |
---|
147 | # Clients use this to query values within this radiodial. With no |
---|
148 | # args, it returns a list of all values stored in the widget. The |
---|
149 | # "current" arg requests only the current value on the radiodial. |
---|
150 | # The @index syntax can be used to request a particular value at |
---|
151 | # an index within the list of values. |
---|
152 | # |
---|
153 | # By default, this method returns the label for each value. The |
---|
154 | # format option can be used to request the label, the value, or |
---|
155 | # both. |
---|
156 | # ---------------------------------------------------------------------- |
---|
157 | itcl::body Rappture::Radiodial::get {args} { |
---|
158 | Rappture::getopts args params { |
---|
159 | value -format "label" |
---|
160 | } |
---|
161 | if {[llength $args] > 1} { |
---|
162 | error "wrong # args: should be \"get ?-format f? ?current|@index\"" |
---|
163 | } |
---|
164 | set index [lindex $args 0] |
---|
165 | if {"" == $index} { |
---|
166 | set ilist "" |
---|
167 | for {set i 0} {$i < [llength $_values]} {incr i} { |
---|
168 | append ilist $i |
---|
169 | } |
---|
170 | } elseif {"current" == $index} { |
---|
171 | set ilist [lsearch -exact $_values $_current] |
---|
172 | if {$ilist < 0} { |
---|
173 | set ilist "" |
---|
174 | } |
---|
175 | } elseif {[regexp {^@([0-9]+|end)$} $index match i]} { |
---|
176 | set ilist $i |
---|
177 | } |
---|
178 | if {[llength $ilist] == 1} { |
---|
179 | set op set |
---|
180 | } else { |
---|
181 | set op lappend |
---|
182 | } |
---|
183 | |
---|
184 | set rlist "" |
---|
185 | foreach i $ilist { |
---|
186 | switch -- $params(-format) { |
---|
187 | label { |
---|
188 | set v [lindex $_values $i] |
---|
189 | $op rlist $_val2label($v) |
---|
190 | } |
---|
191 | value { |
---|
192 | $op rlist [lindex $_values $i] |
---|
193 | } |
---|
194 | all { |
---|
195 | set v [lindex $_values $i] |
---|
196 | $op rlist [list $_val2label($v) $v] |
---|
197 | } |
---|
198 | default { |
---|
199 | error "bad value \"$v\": should be label, value, all" |
---|
200 | } |
---|
201 | } |
---|
202 | } |
---|
203 | return $rlist |
---|
204 | } |
---|
205 | |
---|
206 | # ---------------------------------------------------------------------- |
---|
207 | # USAGE: current ?<newval>? |
---|
208 | # |
---|
209 | # Clients use this to get/set the current value for this widget. |
---|
210 | # ---------------------------------------------------------------------- |
---|
211 | itcl::body Rappture::Radiodial::current {args} { |
---|
212 | if {[llength $args] == 0} { |
---|
213 | return $_current |
---|
214 | } elseif {[llength $args] == 1} { |
---|
215 | set newval [lindex $args 0] |
---|
216 | set found 0 |
---|
217 | foreach v $_values { |
---|
218 | if {[string equal $_val2label($v) $newval]} { |
---|
219 | set newval $v |
---|
220 | set found 1 |
---|
221 | break |
---|
222 | } |
---|
223 | } |
---|
224 | if {!$found} { |
---|
225 | error "bad value \"$newval\"" |
---|
226 | } |
---|
227 | set _current $newval |
---|
228 | return $_current |
---|
229 | } |
---|
230 | error "wrong # args: should be \"current ?newval?\"" |
---|
231 | } |
---|
232 | |
---|
233 | # ---------------------------------------------------------------------- |
---|
234 | # USAGE: color <value> |
---|
235 | # |
---|
236 | # Clients use this to query the color associated with a <value> |
---|
237 | # along the dial. |
---|
238 | # ---------------------------------------------------------------------- |
---|
239 | itcl::body Rappture::Radiodial::color {value} { |
---|
240 | set found 0 |
---|
241 | foreach v $_values { |
---|
242 | if {[string equal $_val2label($v) $value]} { |
---|
243 | set value $v |
---|
244 | set found 1 |
---|
245 | break |
---|
246 | } |
---|
247 | } |
---|
248 | if {!$found} { |
---|
249 | error "bad value \"$value\"" |
---|
250 | } |
---|
251 | |
---|
252 | if {"" != $_spectrum} { |
---|
253 | foreach {min max} [_limits] break |
---|
254 | set frac [expr {double($value-$min)/($max-$min)}] |
---|
255 | set color [$_spectrum get $frac] |
---|
256 | } else { |
---|
257 | if {$value == $_current} { |
---|
258 | set color $_activecolor |
---|
259 | } else { |
---|
260 | set color $itk_option(-linecolor) |
---|
261 | } |
---|
262 | } |
---|
263 | return $color |
---|
264 | } |
---|
265 | |
---|
266 | # ---------------------------------------------------------------------- |
---|
267 | # USAGE: _redraw |
---|
268 | # |
---|
269 | # Called automatically whenever the widget changes size to redraw |
---|
270 | # all elements within it. |
---|
271 | # ---------------------------------------------------------------------- |
---|
272 | itcl::body Rappture::Radiodial::_redraw {} { |
---|
273 | set c $itk_component(dial) |
---|
274 | $c delete all |
---|
275 | |
---|
276 | set w [winfo width $c] |
---|
277 | set h [winfo height $c] |
---|
278 | set y1 [expr {$h-[image height $images(knob)]/2-1}] |
---|
279 | set y0 [expr {$y1 - $itk_option(-thickness)-1}] |
---|
280 | set x0 1 |
---|
281 | set x1 [expr {$w-$_vwidth-4}] |
---|
282 | |
---|
283 | # draw the background rectangle |
---|
284 | $c create rectangle $x0 $y0 $x1 $y1 \ |
---|
285 | -outline $itk_option(-dialoutlinecolor) \ |
---|
286 | -fill $itk_option(-dialfillcolor) |
---|
287 | |
---|
288 | # draw lines for all values |
---|
289 | foreach {min max} [_limits] break |
---|
290 | if {$max > $min} { |
---|
291 | foreach v $_values { |
---|
292 | set frac [expr {double($v-$min)/($max-$min)}] |
---|
293 | if {"" != $_spectrum} { |
---|
294 | set color [$_spectrum get $frac] |
---|
295 | } else { |
---|
296 | if {$v == $_current} { |
---|
297 | set color $_activecolor |
---|
298 | } else { |
---|
299 | set color $itk_option(-linecolor) |
---|
300 | } |
---|
301 | } |
---|
302 | set thick [expr {($v == $_current) ? 3 : 1}] |
---|
303 | |
---|
304 | set x [expr {$frac*($x1-$x0) + $x0}] |
---|
305 | $c create line $x [expr {$y0+1}] $x $y1 -fill $color -width $thick |
---|
306 | } |
---|
307 | |
---|
308 | if {"" != $_current} { |
---|
309 | set x [expr {double($_current-$min)/($max-$min)*($x1-$x0) + $x0}] |
---|
310 | $c create image $x [expr {$h-1}] -anchor s -image $images(knob) |
---|
311 | } |
---|
312 | } |
---|
313 | |
---|
314 | # if the -valuewidth is > 0, then make room for the value |
---|
315 | set vw $itk_option(-valuewidth) |
---|
316 | if {$vw > 0 && "" != $_current} { |
---|
317 | set str $_val2label($_current) |
---|
318 | if {[string length $str] >= $vw} { |
---|
319 | set str "[string range $str 0 [expr {$vw-3}]]..." |
---|
320 | } |
---|
321 | |
---|
322 | set dy [expr {([font metrics $itk_option(-font) -linespace] |
---|
323 | - [font metrics $itk_option(-font) -ascent])/2}] |
---|
324 | |
---|
325 | set id [$c create text [expr {$x1+4}] [expr {($y1+$y0)/2+$dy}] \ |
---|
326 | -anchor w -text $str -font $itk_option(-font)] |
---|
327 | foreach {x0 y0 x1 y1} [$c bbox $id] break |
---|
328 | set x0 [expr {$x0 + 10}] |
---|
329 | |
---|
330 | # set up a tooltip so you can mouse over truncated values |
---|
331 | Rappture::Tooltip::text $c $_val2label($_current) |
---|
332 | $c bind $id <Enter> \ |
---|
333 | [list ::Rappture::Tooltip::tooltip pending %W +$x0,$y1] |
---|
334 | $c bind $id <Leave> \ |
---|
335 | [list ::Rappture::Tooltip::tooltip cancel] |
---|
336 | $c bind $id <ButtonPress> \ |
---|
337 | [list ::Rappture::Tooltip::tooltip cancel] |
---|
338 | $c bind $id <KeyPress> \ |
---|
339 | [list ::Rappture::Tooltip::tooltip cancel] |
---|
340 | } |
---|
341 | } |
---|
342 | |
---|
343 | # ---------------------------------------------------------------------- |
---|
344 | # USAGE: _click <x> <y> |
---|
345 | # |
---|
346 | # Called automatically whenever the user clicks or drags on the widget |
---|
347 | # to select a value. Moves the current value to the one nearest the |
---|
348 | # click point. If the value actually changes, it generates a <<Value>> |
---|
349 | # event to notify clients. |
---|
350 | # ---------------------------------------------------------------------- |
---|
351 | itcl::body Rappture::Radiodial::_click {x y} { |
---|
352 | set c $itk_component(dial) |
---|
353 | set w [winfo width $c] |
---|
354 | set h [winfo height $c] |
---|
355 | set x0 1 |
---|
356 | set x1 [expr {$w-$_vwidth-4}] |
---|
357 | |
---|
358 | focus $itk_component(hull) |
---|
359 | |
---|
360 | # draw lines for all values |
---|
361 | foreach {min max} [_limits] break |
---|
362 | if {$max > $min && $x >= $x0 && $x <= $x1} { |
---|
363 | set dmin $w |
---|
364 | set xnearest 0 |
---|
365 | set vnearest "" |
---|
366 | foreach v $_values { |
---|
367 | set xv [expr {double($v-$min)/($max-$min)*($x1-$x0) + $x0}] |
---|
368 | if {abs($xv-$x) < $dmin} { |
---|
369 | set dmin [expr {abs($xv-$x)}] |
---|
370 | set xnearest $xv |
---|
371 | set vnearest $v |
---|
372 | } |
---|
373 | } |
---|
374 | |
---|
375 | if {$vnearest != $_current} { |
---|
376 | set _current $vnearest |
---|
377 | _redraw |
---|
378 | |
---|
379 | event generate $itk_component(hull) <<Value>> |
---|
380 | } |
---|
381 | } |
---|
382 | } |
---|
383 | |
---|
384 | # ---------------------------------------------------------------------- |
---|
385 | # USAGE: _navigate <offset> |
---|
386 | # |
---|
387 | # Called automatically whenever the user presses left/right keys |
---|
388 | # to nudge the current value left or right by some <offset>. If the |
---|
389 | # value actually changes, it generates a <<Value>> event to notify |
---|
390 | # clients. |
---|
391 | # ---------------------------------------------------------------------- |
---|
392 | itcl::body Rappture::Radiodial::_navigate {offset} { |
---|
393 | set index [lsearch -exact $_values $_current] |
---|
394 | if {$index >= 0} { |
---|
395 | incr index $offset |
---|
396 | if {$index >= [llength $_values]} { |
---|
397 | set index [expr {[llength $_values]-1}] |
---|
398 | } elseif {$index < 0} { |
---|
399 | set index 0 |
---|
400 | } |
---|
401 | |
---|
402 | set newval [lindex $_values $index] |
---|
403 | if {$newval != $_current} { |
---|
404 | set _current $newval |
---|
405 | _redraw |
---|
406 | |
---|
407 | event generate $itk_component(hull) <<Value>> |
---|
408 | } |
---|
409 | } |
---|
410 | } |
---|
411 | |
---|
412 | # ---------------------------------------------------------------------- |
---|
413 | # USAGE: _limits |
---|
414 | # |
---|
415 | # Used internally to compute the overall min/max limits for the |
---|
416 | # radio dial. Returns {min max}, representing the end values for |
---|
417 | # the scale. |
---|
418 | # ---------------------------------------------------------------------- |
---|
419 | itcl::body Rappture::Radiodial::_limits {} { |
---|
420 | if {[llength $_values] == 0} { |
---|
421 | set min 0 |
---|
422 | set max 0 |
---|
423 | } else { |
---|
424 | set min [lindex $_values 0] |
---|
425 | set max $min |
---|
426 | foreach v [lrange $_values 1 end] { |
---|
427 | if {$v < $min} { set min $v } |
---|
428 | if {$v > $max} { set max $v } |
---|
429 | } |
---|
430 | set del [expr {$max-$min}] |
---|
431 | set min [expr {$min-0.1*$del}] |
---|
432 | set max [expr {$max+0.1*$del}] |
---|
433 | } |
---|
434 | |
---|
435 | if {"" != $itk_option(-min)} { |
---|
436 | set min $itk_option(-min) |
---|
437 | } |
---|
438 | if {"" != $itk_option(-max)} { |
---|
439 | set max $itk_option(-max) |
---|
440 | } |
---|
441 | return [list $min $max] |
---|
442 | } |
---|
443 | |
---|
444 | # ---------------------------------------------------------------------- |
---|
445 | # USAGE: _fixSize |
---|
446 | # |
---|
447 | # Used internally to compute the overall size of the widget based |
---|
448 | # on the -thickness and -length options. |
---|
449 | # ---------------------------------------------------------------------- |
---|
450 | itcl::body Rappture::Radiodial::_fixSize {} { |
---|
451 | set h [winfo pixels $itk_component(hull) $itk_option(-thickness)] |
---|
452 | set h [expr {$h/2 + [image height $images(knob)]}] |
---|
453 | |
---|
454 | set w [winfo pixels $itk_component(hull) $itk_option(-length)] |
---|
455 | |
---|
456 | # if the -valuewidth is > 0, then make room for the value |
---|
457 | if {$itk_option(-valuewidth) > 0} { |
---|
458 | set charw [font measure $itk_option(-font) "n"] |
---|
459 | set _vwidth [expr {$itk_option(-valuewidth)*$charw}] |
---|
460 | set w [expr {$w+$_vwidth+4}] |
---|
461 | } else { |
---|
462 | set _vwidth 0 |
---|
463 | } |
---|
464 | |
---|
465 | $itk_component(dial) configure -width $w -height $h |
---|
466 | } |
---|
467 | |
---|
468 | # ---------------------------------------------------------------------- |
---|
469 | # CONFIGURE: -thickness |
---|
470 | # ---------------------------------------------------------------------- |
---|
471 | itcl::configbody Rappture::Radiodial::thickness { |
---|
472 | _fixSize |
---|
473 | } |
---|
474 | |
---|
475 | # ---------------------------------------------------------------------- |
---|
476 | # CONFIGURE: -length |
---|
477 | # ---------------------------------------------------------------------- |
---|
478 | itcl::configbody Rappture::Radiodial::length { |
---|
479 | _fixSize |
---|
480 | } |
---|
481 | |
---|
482 | # ---------------------------------------------------------------------- |
---|
483 | # CONFIGURE: -font |
---|
484 | # ---------------------------------------------------------------------- |
---|
485 | itcl::configbody Rappture::Radiodial::font { |
---|
486 | _fixSize |
---|
487 | } |
---|
488 | |
---|
489 | # ---------------------------------------------------------------------- |
---|
490 | # CONFIGURE: -valuewidth |
---|
491 | # ---------------------------------------------------------------------- |
---|
492 | itcl::configbody Rappture::Radiodial::valuewidth { |
---|
493 | if {![string is integer $itk_option(-valuewidth)]} { |
---|
494 | error "bad value \"$itk_option(-valuewidth)\": should be integer" |
---|
495 | } |
---|
496 | after cancel [itcl::code $this _redraw] |
---|
497 | after idle [itcl::code $this _redraw] |
---|
498 | } |
---|
499 | |
---|
500 | # ---------------------------------------------------------------------- |
---|
501 | # CONFIGURE: -dialoutlinecolor |
---|
502 | # ---------------------------------------------------------------------- |
---|
503 | itcl::configbody Rappture::Radiodial::dialoutlinecolor { |
---|
504 | after cancel [itcl::code $this _redraw] |
---|
505 | after idle [itcl::code $this _redraw] |
---|
506 | } |
---|
507 | |
---|
508 | # ---------------------------------------------------------------------- |
---|
509 | # CONFIGURE: -dialfillcolor |
---|
510 | # ---------------------------------------------------------------------- |
---|
511 | itcl::configbody Rappture::Radiodial::dialfillcolor { |
---|
512 | after cancel [itcl::code $this _redraw] |
---|
513 | after idle [itcl::code $this _redraw] |
---|
514 | } |
---|
515 | |
---|
516 | # ---------------------------------------------------------------------- |
---|
517 | # CONFIGURE: -linecolor |
---|
518 | # ---------------------------------------------------------------------- |
---|
519 | itcl::configbody Rappture::Radiodial::linecolor { |
---|
520 | after cancel [itcl::code $this _redraw] |
---|
521 | after idle [itcl::code $this _redraw] |
---|
522 | } |
---|
523 | |
---|
524 | # ---------------------------------------------------------------------- |
---|
525 | # CONFIGURE: -activelinecolor |
---|
526 | # ---------------------------------------------------------------------- |
---|
527 | itcl::configbody Rappture::Radiodial::activelinecolor { |
---|
528 | set val $itk_option(-activelinecolor) |
---|
529 | if {[catch {$val isa ::Rappture::Spectrum} valid] == 0 && $valid} { |
---|
530 | set _spectrum $val |
---|
531 | set _activecolor "" |
---|
532 | } elseif {[catch {winfo rgb $itk_component(hull) $val}] == 0} { |
---|
533 | set _spectrum "" |
---|
534 | set _activecolor $val |
---|
535 | } else { |
---|
536 | error "bad value \"$val\": should be Spectrum object or color" |
---|
537 | } |
---|
538 | after cancel [itcl::code $this _redraw] |
---|
539 | after idle [itcl::code $this _redraw] |
---|
540 | } |
---|