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source: trunk/gui/scripts/deviceViewer1D.tcl @ 1342

Last change on this file since 1342 was 1342, checked in by gah, 15 years ago
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1	# ----------------------------------------------------------------------
2	# COMPONENT: deviceViewer1D - visualizer for 1D device geometries
3	#
4	# This widget is a simple visualizer for 1D devices. It takes the
5	# Rappture XML representation for a 1D device and draws various
6	# facets of the data. Each facet shows the physical layout along
7	# with some other quantity. The "Electrical" facet shows electrical
8	# contacts. The "Doping" facet shows the doping profile, and so
9	# forth.
10	# ======================================================================
11	# AUTHOR: Michael McLennan, Purdue University
12	# Copyright (c) 2004-2005 Purdue Research Foundation
13	#
14	# See the file "license.terms" for information on usage and
15	# redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
16	# ======================================================================
17	package require Itk
18	package require Img
19	package require BLT
20
21	option add *DeviceViewer1D.padding 4 widgetDefault
22	option add *DeviceViewer1D.deviceSize 0.25i widgetDefault
23	option add *DeviceViewer1D.deviceOutline black widgetDefault
24	option add DeviceViewer1Dgraph.width 3i widgetDefault
25	option add DeviceViewer1Dgraph.height 2i widgetDefault
26
27	itcl::class Rappture::DeviceViewer1D {
28	inherit itk::Widget
29
30	itk_option define -device device Device ""
31
32	constructor {owner args} { # defined below }
33	destructor { # defined below }
34
35	public method add {dataobj {settings ""}}
36	public method get {}
37	public method delete {args}
38	public method parameters {title args} { # do nothing }
39
40	public method controls {option args}
41	public method download {option args}
42
43	protected method _loadDevice {}
44	protected method _loadParameters {frame path}
45	protected method _changeTabs {}
46	protected method _fixSize {}
47	protected method _fixAxes {}
48	protected method _align {}
49
50	protected method _marker {option {name ""} {path ""}}
51
52	protected method _controlCreate {container libObj path}
53	protected method _controlSet {widget libObj path}
54
55	private variable _owner "" ;# thing managing this control
56	private variable _dlist "" ;# list of dataobj objects
57	private variable _dobj2raise ;# maps dataobj => raise flag
58	private variable _device "" ;# XML library with <structure>
59	private variable _tab2fields ;# maps tab name => list of fields
60	private variable _field2parm ;# maps field path => parameter name
61	private variable _units "" ;# units for field being edited
62	private variable _marker ;# marker currently being edited
63	}
64
65	itk::usual DeviceViewer1D {
66	}
67
68	# ----------------------------------------------------------------------
69	# CONSTRUCTOR
70	# ----------------------------------------------------------------------
71	itcl::body Rappture::DeviceViewer1D::constructor {owner args} {
72	set _owner $owner
73
74	pack propagate $itk_component(hull) no
75
76	itk_component add tabs {
77	blt::tabset $itk_interior.tabs -borderwidth 0 -relief flat \
78	-side bottom -tearoff 0 \
79	-selectcommand [itcl::code $this _changeTabs]
80	} {
81	keep -activebackground -activeforeground
82	keep -background -cursor -font
83	rename -highlightbackground -background background Background
84	keep -highlightcolor -highlightthickness
85	keep -tabbackground -tabforeground
86	rename -selectbackground -background background Background
87	rename -selectforeground -foreground foreground Foreground
88	}
89	pack $itk_component(tabs) -expand yes -fill both
90
91	itk_component add -protected inner {
92	frame $itk_component(tabs).inner
93	}
94
95	itk_component add top {
96	frame $itk_component(inner).top
97	}
98	pack $itk_component(top) -fill x
99
100	itk_component add layout {
101	Rappture::DeviceLayout1D $itk_component(inner).layout
102	}
103	pack $itk_component(layout) -side top -fill x -pady 4
104
105	itk_component add graph {
106	blt::graph $itk_component(inner).graph \
107	-highlightthickness 0 -plotpadx 0 -plotpady 0
108	} {
109	keep -background -foreground -cursor -font
110	}
111	pack $itk_component(graph) -expand yes -fill both
112	$itk_component(graph) legend configure -hide yes
113
114	bind $itk_component(graph) <Configure> "
115	[list after cancel [list catch [itcl::code $this _align]]]
116	[list after 100 [list catch [itcl::code $this _align]]]
117	"
118
119	itk_component add geditor {
120	Rappture::Editor $itk_component(graph).editor \
121	-activatecommand [itcl::code $this _marker activate] \
122	-validatecommand [itcl::code $this _marker validate] \
123	-applycommand [itcl::code $this _marker apply]
124	}
125
126	itk_component add devcntls {
127	Rappture::Notebook $itk_component(inner).devcntls
128	}
129	pack $itk_component(devcntls) -side bottom -fill x
130
131	eval itk_initialize $args
132
133	after cancel [list catch [itcl::code $this _fixSize]]
134	after idle [list catch [itcl::code $this _fixSize]]
135	}
136
137	# ----------------------------------------------------------------------
138	# DESTRUCTOR
139	# ----------------------------------------------------------------------
140	itcl::body Rappture::DeviceViewer1D::destructor {} {
141	set _device ""
142	foreach name [array names _tab2fields] {
143	eval itcl::delete object $_tab2fields($name)
144	}
145	after cancel [list catch [itcl::code $this _fixAxes]]
146	after cancel [list catch [itcl::code $this _align]]
147	after cancel [list catch [itcl::code $this _loadDevice]]
148	}
149
150	# ----------------------------------------------------------------------
151	# USAGE: add <dataobj> ?<settings>?
152	#
153	# Clients use this to add a data object to the plot. The optional
154	# <settings> are used to configure the plot. Allowed settings are
155	# -color, -brightness, -width, -linestyle, and -raise. Only
156	# -brightness and -raise do anything.
157	# ----------------------------------------------------------------------
158	itcl::body Rappture::DeviceViewer1D::add {dataobj {settings ""}} {
159	array set params {
160	-color auto
161	-brightness 0
162	-width 1
163	-raise 0
164	-linestyle solid
165	-description ""
166	-param ""
167	}
168	foreach {opt val} $settings {
169	if {![info exists params($opt)]} {
170	error "bad settings \"$opt\": should be [join [lsort [array names params]] {, }]"
171	}
172	set params($opt) $val
173	}
174
175	set pos [lsearch -exact $dataobj $_dlist]
176
177	if {$pos < 0} {
178	if {![Rappture::library isvalid $dataobj]} {
179	error "bad value \"$dataobj\": should be Rappture::library object"
180	}
181
182	lappend _dlist $dataobj
183	set _dobj2raise($dataobj) $params(-raise)
184
185	after cancel [list catch [itcl::code $this _loadDevice]]
186	after idle [list catch [itcl::code $this _loadDevice]]
187	}
188	}
189
190	# ----------------------------------------------------------------------
191	# USAGE: get
192	#
193	# Clients use this to query the list of objects being plotted, in
194	# order from bottom to top of this result.
195	# ----------------------------------------------------------------------
196	itcl::body Rappture::DeviceViewer1D::get {} {
197	# put the dataobj list in order according to -raise options
198	set dlist $_dlist
199	foreach obj $dlist {
200	if {[info exists _dobj2raise($obj)] && $_dobj2raise($obj)} {
201	set i [lsearch -exact $dlist $obj]
202	if {$i >= 0} {
203	set dlist [lreplace $dlist $i $i]
204	lappend dlist $obj
205	}
206	}
207	}
208	return $dlist
209	}
210
211	# ----------------------------------------------------------------------
212	# USAGE: delete ?<dataobj> <dataobj> ...?
213	#
214	# Clients use this to delete a dataobj from the plot. If no dataobjs
215	# are specified, then all dataobjs are deleted.
216	# ----------------------------------------------------------------------
217	itcl::body Rappture::DeviceViewer1D::delete {args} {
218	if {[llength $args] == 0} {
219	set args $_dlist
220	}
221
222	# delete all specified dataobjs
223	set changed 0
224	foreach dataobj $args {
225	set pos [lsearch -exact $_dlist $dataobj]
226	if {$pos >= 0} {
227	set _dlist [lreplace $_dlist $pos $pos]
228	catch {unset _dobj2raise($dataobj)}
229	set changed 1
230	}
231	}
232
233	# if anything changed, then rebuild the plot
234	if {$changed} {
235	after cancel [list catch [itcl::code $this _loadDevice]]
236	after idle [list catch [itcl::code $this _loadDevice]]
237	}
238	}
239
240	# ----------------------------------------------------------------------
241	# USAGE: controls insert <pos> <xmlobj> <path>
242	#
243	# Clients use this to add a control to the internal panels of this
244	# widget. Such controls are usually placed at the top of the widget,
245	# but if possible, they are integrated directly onto the device
246	# layout or the field area.
247	# ----------------------------------------------------------------------
248	itcl::body Rappture::DeviceViewer1D::controls {option args} {
249	switch -- $option {
250	insert {
251	if {[llength $args] != 3} {
252	error "wrong # args: should be \"controls insert pos xmlobj path\""
253	}
254	set pos [lindex $args 0]
255	set xmlobj [lindex $args 1]
256	set path [lindex $args 2]
257	if {[string match structure.parameters $path]} {
258	} elseif {[string match structure.components* $path]} {
259	$itk_component(layout) controls insert $pos $xmlobj $path
260	}
261	}
262	default {
263	error "bad option \"$option\": should be insert"
264	}
265	}
266	}
267
268
269	# ----------------------------------------------------------------------
270	# USAGE: download coming
271	# USAGE: download controls <downloadCommand>
272	# USAGE: download now
273	#
274	# Clients use this method to create a downloadable representation
275	# of the plot. Returns a list of the form {ext string}, where
276	# "ext" is the file extension (indicating the type of data) and
277	# "string" is the data itself.
278	# ----------------------------------------------------------------------
279	itcl::body Rappture::DeviceViewer1D::download {option args} {
280	switch $option {
281	coming {
282	# nothing to do
283	}
284	controls {
285	# no controls for this download yet
286	return ""
287	}
288	now {
289	return "" ;# not implemented yet!
290	}
291	default {
292	error "bad option \"$option\": should be coming, controls, now"
293	}
294	}
295	}
296
297	# ----------------------------------------------------------------------
298	# USAGE: _loadDevice
299	#
300	# Used internally to search for fields and create corresponding
301	# tabs whenever a device is installed into this viewer.
302	# ----------------------------------------------------------------------
303	itcl::body Rappture::DeviceViewer1D::_loadDevice {} {
304	set _device [lindex [get] end]
305
306	#
307	# Release any info left over from the last device.
308	#
309	foreach name [array names _tab2fields] {
310	eval itcl::delete object $_tab2fields($name)
311	}
312	catch {unset _tab2fields}
313	catch {unset _field2parm}
314
315	if {[winfo exists $itk_component(top).cntls]} {
316	$itk_component(top).cntls delete 0 end
317	}
318
319	#
320	# Scan through the current device and extract the list of
321	# fields. Create a tab for each field.
322	#
323	if {$_device != ""} {
324	foreach nn [$_device children fields] {
325	set name [$_device get fields.$nn.about.label]
326	if {$name == ""} {
327	set name $nn
328	}
329
330	set fobj [Rappture::Field ::#auto $_device fields.$nn]
331	lappend _tab2fields($name) $fobj
332	}
333	}
334	set tabs [lsort [array names _tab2fields]]
335
336	if {[$itk_component(tabs) size] > 0} {
337	$itk_component(tabs) delete 0 end
338	}
339
340	if {[llength $tabs] <= 0} {
341	#
342	# No fields? Then we don't need to bother with tabs.
343	# Just pack the inner frame directly. If there are no
344	# fields, get rid of the graph.
345	#
346	pack $itk_component(inner) -expand yes -fill both
347	if {[llength $tabs] > 0} {
348	pack $itk_component(graph) -expand yes -fill both
349	} else {
350	pack forget $itk_component(graph)
351	$itk_component(layout) configure -leftmargin 0 -rightmargin 0
352	}
353	} else {
354	#
355	# Two or more fields? Then create a tab for each field
356	# and select the first one by default. Make sure the
357	# graph is packed.
358	#
359	pack forget $itk_component(inner)
360	pack $itk_component(graph) -expand yes -fill both
361
362	foreach name $tabs {
363	$itk_component(tabs) insert end $name \
364	-activebackground $itk_option(-background)
365	}
366	$itk_component(tabs) select 0
367	}
368
369	#
370	# Scan through and look for any parameters in the <structure>.
371	# Register any parameters associated with fields, so we can
372	# add them as active controls whenever we install new fields.
373	# Create controls for any remaining parameters, so the user
374	# can see that there's something to adjust.
375	#
376	if {$_device != ""} {
377	_loadParameters $itk_component(top) parameters
378	}
379
380	#
381	# Install the first tab
382	#
383	_changeTabs
384
385	#
386	# Fix the right margin of the graph so that it has enough room
387	# to display the right-hand edge of the device.
388	#
389	$itk_component(graph) configure \
390	-rightmargin [$itk_component(layout) extents bar3D]
391
392	after cancel [list catch [itcl::code $this _fixSize]]
393	after idle [list catch [itcl::code $this _fixSize]]
394	}
395
396	# ----------------------------------------------------------------------
397	# USAGE: _loadParameters <frame> <path>
398	#
399	# Used internally in _loadDevice to load child parameters at the
400	# specified <path> into the <frame>. If any of the children are
401	# groups, then this is called recursively to fill in the group
402	# children.
403	# ----------------------------------------------------------------------
404	itcl::body Rappture::DeviceViewer1D::_loadParameters {frame path} {
405	foreach cname [$_device children $path] {
406	set handled 0
407	set type [$_device element -as type $path.$cname]
408	if {$type == "about"} {
409	continue
410	}
411	if {$type == "number"} {
412	set name [$_device element -as id $path.$cname]
413
414	# look for a field that uses this parameter
415	set found ""
416	foreach fname [$_device children fields] {
417	foreach comp [$_device children fields.$fname] {
418	set v [$_device get fields.$fname.$comp.constant]
419	if {[string equal $v $name]} {
420	set found "fields.$fname.$comp"
421	break
422	}
423	}
424	if {"" != $found} break
425	}
426
427	if {"" != $found} {
428	set _field2parm($found) $name
429	set handled 1
430	}
431	}
432
433	#
434	# Any parameter that was not handled above should be handled
435	# here, by adding it to a control panel above the device
436	# layout area.
437	#
438	if {!$handled} {
439	if {![winfo exists $frame.cntls]} {
440	Rappture::Controls $frame.cntls $_owner
441	pack $frame.cntls -expand yes -fill both
442	}
443	$frame.cntls insert end $path.$cname
444
445	#
446	# If this is a group, then we must add its children
447	# recursively.
448	#
449	if {$type == "group"} {
450	set gr [$frame.cntls control -value end]
451	_loadParameters [$gr component inner] $path.$cname
452	}
453	}
454	}
455	}
456
457	# ----------------------------------------------------------------------
458	# USAGE: _changeTabs
459	#
460	# Used internally to change the field being displayed whenever a new
461	# tab is selected.
462	# ----------------------------------------------------------------------
463	itcl::body Rappture::DeviceViewer1D::_changeTabs {} {
464	set graph $itk_component(graph)
465
466	#
467	# Figure out which tab is selected and make the inner frame
468	# visible in that tab.
469	#
470	set i [$itk_component(tabs) index select]
471	if {$i != ""} {
472	set name [$itk_component(tabs) get $i]
473	$itk_component(tabs) tab configure $name \
474	-window $itk_component(inner) -fill both
475	} else {
476	set name [lindex [array names _tab2fields] 0]
477	}
478
479	#
480	# Update the graph to show the current field.
481	#
482	eval $graph element delete [$graph element names]
483	eval $graph marker delete [$graph marker names]
484
485	foreach {zmin zmax} [$itk_component(layout) limits] { break }
486	if {$zmin != "" && $zmin < $zmax} {
487	$graph axis configure x -min $zmin -max $zmax
488	}
489
490	if {$_device != ""} {
491	set units [$_device get units]
492	if {$units != "arbitrary"} {
493	$graph axis configure x -hide no -title "Position ($units)"
494	} else {
495	$graph axis configure x -hide yes
496	}
497	} else {
498	$graph axis configure x -hide no -title "Position"
499	}
500
501	# turn on auto limits
502	$graph axis configure y -min "" -max ""
503
504	set flist ""
505	if {[info exists _tab2fields($name)]} {
506	set flist $_tab2fields($name)
507	}
508
509	set n 0
510	foreach fobj $flist {
511	catch {unset hints}
512	array set hints [$fobj hints]
513
514	if {[info exists hints(units)]} {
515	set _units $hints(units)
516	$graph axis configure y -title "$name ($hints(units))"
517	} else {
518	set _units ""
519	$graph axis configure y -title $name
520	}
521
522	if {[info exists hints(scale)]
523	&& [string match log* $hints(scale)]} {
524	$graph axis configure y -logscale yes
525	} else {
526	$graph axis configure y -logscale no
527	}
528
529	foreach comp [$fobj components] {
530	# can only handle 1D meshes here
531	if {[$fobj components -dimensions $comp] != "1D"} {
532	continue
533	}
534
535	set elem "elem[incr n]"
536	set xv [$fobj mesh $comp]
537	set yv [$fobj values $comp]
538
539	$graph element create $elem -x $xv -y $yv \
540	-color black -symbol "" -linewidth 2
541
542	if {[info exists hints(color)]} {
543	$graph element configure $elem -color $hints(color)
544	}
545
546	foreach {path x y val} [$fobj controls get $comp] {
547	if {$path != ""} {
548	set id "control[incr n]"
549	$graph marker create text -coords [list $x $y] \
550	-text $val -anchor s -name $id -background ""
551	$graph marker bind $id <Enter> \
552	[itcl::code $this _marker enter $id]
553	$graph marker bind $id <Leave> \
554	[itcl::code $this _marker leave $id]
555	$graph marker bind $id <ButtonPress> \
556	[itcl::code $this _marker edit $id $fobj/$path]
557	}
558	}
559	}
560	}
561
562	# let the widget settle, then fix the axes to "nice" values
563	after cancel [list catch [itcl::code $this _fixAxes]]
564	after 100 [list catch [itcl::code $this _fixAxes]]
565	}
566
567	# ----------------------------------------------------------------------
568	# USAGE: _fixSize
569	#
570	# Used internally to fix the overall size of this widget based on
571	# the various parts inside. Sets the requested width/height of the
572	# widget so that it is big enough to display the device and its
573	# fields.
574	# ----------------------------------------------------------------------
575	itcl::body Rappture::DeviceViewer1D::_fixSize {} {
576	update idletasks
577	set w [winfo reqwidth $itk_component(tabs)]
578	set h [winfo reqheight $itk_component(tabs)]
579	component hull configure -width $w -height $h
580	}
581
582	# ----------------------------------------------------------------------
583	# USAGE: _fixAxes
584	#
585	# Used internally to adjust the y-axis limits of the graph to "nice"
586	# values, so that any control marker associated with the value,
587	# for example, remains on screen.
588	# ----------------------------------------------------------------------
589	itcl::body Rappture::DeviceViewer1D::_fixAxes {} {
590	set graph $itk_component(graph)
591	if {![winfo ismapped $graph]} {
592	after cancel [list catch [itcl::code $this _fixAxes]]
593	after 100 [list catch [itcl::code $this _fixAxes]]
594	return
595	}
596
597	#
598	# HACK ALERT!
599	# Use this code to fix up the y-axis limits for the BLT graph.
600	# The auto-limits don't always work well. We want them to be
601	# set to a "nice" number slightly above or below the min/max
602	# limits.
603	#
604	set log [$graph axis cget y -logscale]
605	$graph axis configure y -min "" -max ""
606	foreach {min max} [$graph axis limits y] { break }
607
608	if {$log} {
609	set min [expr {0.9*$min}]
610	set max [expr {1.1*$max}]
611	} else {
612	if {$min > 0} {
613	set min [expr {0.95*$min}]
614	} else {
615	set min [expr {1.05*$min}]
616	}
617	if {$max > 0} {
618	set max [expr {1.05*$max}]
619	} else {
620	set max [expr {0.95*$max}]
621	}
622	}
623
624	# bump up the max so that it's big enough to show control markers
625	set fnt $itk_option(-font)
626	set h [expr {[font metrics $fnt -linespace] + 5}]
627	foreach mname [$graph marker names] {
628	set xy [$graph marker cget $mname -coord]
629	foreach {x y} [eval $graph transform $xy] { break }
630	set y [expr {$y-$h}] ;# find top of text in pixels
631	foreach {x y} [eval $graph invtransform [list 0 $y]] { break }
632	if {$y > $max} { set max $y }
633	}
634
635	if {$log} {
636	set min [expr {pow(10.0,floor(log10($min)))}]
637	set max [expr {pow(10.0,ceil(log10($max)))}]
638	} else {
639	set min [expr {0.1floor(10$min)}]
640	set max [expr {0.1ceil(10$max)}]
641	}
642
643	$graph axis configure y -min $min -max $max
644
645	after cancel [list catch [itcl::code $this _align]]
646	after 100 [list catch [itcl::code $this _align]]
647	}
648
649	# ----------------------------------------------------------------------
650	# USAGE: _align
651	#
652	# Used internally to align the margins of the device layout and the
653	# graph, so that two areas line up.
654	# ----------------------------------------------------------------------
655	itcl::body Rappture::DeviceViewer1D::_align {} {
656	set graph $itk_component(graph)
657
658	#
659	# Set the left/right margins of the layout so that it aligns
660	# with the graph. Set the right margin of the graph so it
661	# it is big enough to show the 3D edge of the device that
662	# hangs over on the right-hand side.
663	#
664	update
665	foreach {xmin xmax} [$graph axis limits x] { break }
666	set lm [$graph xaxis transform $xmin]
667	$itk_component(layout) configure -leftmargin $lm
668
669	set w [winfo width $graph]
670	set rm [expr {$w-[$graph xaxis transform $xmax]}]
671	$itk_component(layout) configure -rightmargin $rm
672	}
673
674	# ----------------------------------------------------------------------
675	# USAGE: _marker enter <name>
676	# USAGE: _marker leave <name>
677	# USAGE: _marker edit <name> <path>
678	# USAGE: _marker activate
679	# USAGE: _marker validate <value>
680	# USAGE: _marker apply <value>
681	#
682	# Used internally to manipulate the control markers draw on the
683	# graph for a field.
684	# ----------------------------------------------------------------------
685	itcl::body Rappture::DeviceViewer1D::_marker {option {name ""} {path ""}} {
686	switch -- $option {
687	enter {
688	$itk_component(graph) marker configure $name -background #e5e5e5
689	#
690	# BE CAREFUL: Need an update here to force the graph to
691	# refresh itself or else a subsequent click on the
692	# marker will ignore the text that was recently changed,
693	# and fail to generate a <ButtonPress> event!
694	#
695	update idletasks
696	}
697	leave {
698	$itk_component(graph) marker configure $name -background ""
699	#
700	# BE CAREFUL: Need an update here to force the graph to
701	# refresh itself or else a subsequent click on the
702	# marker will ignore the text that was recently changed,
703	# and fail to generate a <ButtonPress> event!
704	#
705	update idletasks
706	}
707	edit {
708	set _marker(name) $name
709	set _marker(fobj) [lindex [split $path /] 0]
710	set _marker(path) [lindex [split $path /] 1]
711	$itk_component(geditor) activate
712	}
713	activate {
714	set g $itk_component(graph)
715	set val [$g marker cget $_marker(name) -text]
716	foreach {x y} [$g marker cget $_marker(name) -coords] { break }
717	foreach {x y} [$g transform $x $y] { break }
718	set x [expr {$x + [winfo rootx $g] - 4}]
719	set y [expr {$y + [winfo rooty $g] - 5}]
720
721	set fnt $itk_option(-font)
722	set h [expr {[font metrics $fnt -linespace] + 2}]
723	set w [expr {[font measure $fnt $val] + 5}]
724
725	return [list text $val \
726	x [expr {$x-$w/2}] \
727	y [expr {$y-$h}] \
728	w $w \
729	h $h]
730	}
731	validate {
732	if {$_units != ""} {
733	if {[catch {Rappture::Units::convert $name \
734	-context $_units -to $_units} result] != 0} {
735	if {[regexp {^bad.*: +(.)(.+)} $result match first tail]
736	\|\| [regexp {(.)(.+)} $result match first tail]} {
737	set result "[string toupper $first]$tail"
738	}
739	bell
740	Rappture::Tooltip::cue $itk_component(geditor) $result
741	return 0
742	}
743	}
744	if {[catch {$_marker(fobj) controls validate $_marker(path) $name} result]} {
745	bell
746	Rappture::Tooltip::cue $itk_component(geditor) $result
747	return 0
748	}
749	return 1
750	}
751	apply {
752	if {$_units != ""} {
753	catch {Rappture::Units::convert $name \
754	-context $_units -to $_units} value
755	} else {
756	set value $name
757	}
758
759	$_marker(fobj) controls put $_marker(path) $value
760	$_owner changed $_marker(path)
761	event generate $itk_component(hull) <<Edit>>
762
763	_changeTabs
764	}
765	}
766	}
767
768	# ----------------------------------------------------------------------
769	# USAGE: _controlCreate <container> <libObj> <path>
770	#
771	# Used internally to create a gauge widget and pack it into the
772	# given <container>. When the gauge is set, it updates the value
773	# for the <path> in the <libObj>.
774	# ----------------------------------------------------------------------
775	itcl::body Rappture::DeviceViewer1D::_controlCreate {container libObj path} {
776	set presets ""
777	foreach pre [$libObj children -type preset $path] {
778	lappend presets \
779	[$libObj get $path.$pre.value] \
780	[$libObj get $path.$pre.label]
781	}
782
783	set type Rappture::Gauge
784	set units [$libObj get $path.units]
785	if {$units != ""} {
786	set desc [Rappture::Units::description $units]
787	if {[string match temperature* $desc]} {
788	set type Rappture::TemperatureGauge
789	}
790	}
791
792	set counter 0
793	set w "$container.gauge[incr counter]"
794	while {[winfo exists $w]} {
795	set w "$container.gauge[incr counter]"
796	}
797
798	# create the widget
799	$type $w -units $units -presets $presets
800	pack $w -side top -anchor w
801	bind $w <<Value>> [itcl::code $this _controlSet $w $libObj $path]
802
803	set min [$libObj get $path.min]
804	if {"" != $min} { $w configure -minvalue $min }
805
806	set max [$libObj get $path.max]
807	if {"" != $max} { $w configure -maxvalue $max }
808
809	set str [$libObj get $path.default]
810	if {$str != ""} { $w value $str }
811
812	if {$type == "Rappture::Gauge" && "" != $min && "" != $max} {
813	set color [$libObj get $path.color]
814	if {$color == ""} {
815	set color blue
816	}
817	if {$units != ""} {
818	set min [Rappture::Units::convert $min -to $units -units off]
819	set max [Rappture::Units::convert $max -to $units -units off]
820	}
821	$w configure -spectrum [Rappture::Spectrum ::#auto [list \
822	$min white $max $color] -units $units]
823	}
824
825	set str [$libObj get $path.label]
826	if {$str != ""} {
827	set help [$libObj get $path.help]
828	if {"" != $help} {
829	append str "\n$help"
830	}
831	if {$units != ""} {
832	set desc [Rappture::Units::description $units]
833	append str "\n(units of $desc)"
834	}
835	Rappture::Tooltip::for $w $str
836	}
837
838	set str [$libObj get $path.icon]
839	if {$str != ""} {
840	$w configure -image [image create photo -data $str]
841	}
842	}
843
844	# ----------------------------------------------------------------------
845	# USAGE: _controlSet <widget> <libObj> <path>
846	#
847	# Invoked automatically whenever an internal control changes value.
848	# Queries the new value for the control and assigns the value to the
849	# given <path> on the XML object <libObj>.
850	# ----------------------------------------------------------------------
851	itcl::body Rappture::DeviceViewer1D::_controlSet {widget libObj path} {
852	set newval [$widget value]
853	$libObj put $path.current $newval
854	event generate $itk_component(hull) <<Edit>>
855	}
856
857	# ----------------------------------------------------------------------
858	# CONFIGURATION OPTION: -device
859	#
860	# Set to the Rappture::Library object representing the device being
861	# displayed in the viewer. If set to "", the viewer is cleared to
862	# display nothing.
863	# ----------------------------------------------------------------------
864	itcl::configbody Rappture::DeviceViewer1D::device {
865	if {$itk_option(-device) != ""} {
866	if {![Rappture::library isvalid $itk_option(-device)]} {
867	error "bad value \"$itk_option(-device)\": should be Rappture::Library"
868	}
869	}
870
871	delete
872	if {"" != $itk_option(-device)} {
873	add $itk_option(-device)
874	}
875	_loadDevice
876	}

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