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source: trunk/gui/scripts/nanovisviewer.tcl @ 2744

Last change on this file since 2744 was 2744, checked in by gah, 13 years ago

File size: 70.6 KB

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1
2	# ----------------------------------------------------------------------
3	# COMPONENT: nanovisviewer - 3D volume rendering
4	#
5	# This widget performs volume rendering on 3D scalar/vector datasets.
6	# It connects to the Nanovis server running on a rendering farm,
7	# transmits data, and displays the results.
8	# ======================================================================
9	# AUTHOR: Michael McLennan, Purdue University
10	# Copyright (c) 2004-2005 Purdue Research Foundation
11	#
12	# See the file "license.terms" for information on usage and
13	# redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
14	# ======================================================================
15	package require Itk
16	package require BLT
17	package require Img
18
19	#
20	# FIXME:
21	# Need to Add DX readers this client to examine the data before
22	# it's sent to the server. This will eliminate 90% of the insanity in
23	# computing the limits of all the volumes. I can rip out all the
24	# "receive data" "send transfer function" event crap.
25	#
26	# This means we can compute the transfer function (relative values) and
27	# draw the legend min/max values without waiting for the information to
28	# come from the server. This will also prevent the flashing that occurs
29	# when a new volume is drawn (using the default transfer function) and
30	# then when the correct transfer function has been sent and linked to
31	# the volume.
32	#
33	option add *NanovisViewer.width 4i widgetDefault
34	option add NanovisViewercursor crosshair widgetDefault
35	option add *NanovisViewer.height 4i widgetDefault
36	option add *NanovisViewer.foreground black widgetDefault
37	option add *NanovisViewer.controlBackground gray widgetDefault
38	option add *NanovisViewer.controlDarkBackground #999999 widgetDefault
39	option add *NanovisViewer.plotBackground black widgetDefault
40	option add *NanovisViewer.plotForeground white widgetDefault
41	option add *NanovisViewer.plotOutline gray widgetDefault
42	option add *NanovisViewer.font \
43	--helvetica-medium-r-normal--12-* widgetDefault
44
45	# must use this name -- plugs into Rappture::resources::load
46	proc NanovisViewer_init_resources {} {
47	Rappture::resources::register \
48	nanovis_server Rappture::NanovisViewer::SetServerList
49	}
50
51	itcl::class Rappture::NanovisViewer {
52	inherit Rappture::VisViewer
53
54	itk_option define -plotforeground plotForeground Foreground ""
55	itk_option define -plotbackground plotBackground Background ""
56	itk_option define -plotoutline plotOutline PlotOutline ""
57
58	constructor { hostlist args } {
59	Rappture::VisViewer::constructor $hostlist
60	} {
61	# defined below
62	}
63	destructor {
64	# defined below
65	}
66	public proc SetServerList { namelist } {
67	Rappture::VisViewer::SetServerList "nanovis" $namelist
68	}
69	public method add {dataobj {settings ""}}
70	public method camera {option args}
71	public method delete {args}
72	public method disconnect {}
73	public method download {option args}
74	public method get {args}
75	public method isconnected {}
76	public method limits { tf }
77	public method overmarker { m x }
78	public method sendto { string }
79	public method parameters {title args} {
80	# do nothing
81	}
82	public method rmdupmarker { m x }
83	public method scale {args}
84	public method updatetransferfuncs {}
85
86	protected method Connect {}
87	protected method CurrentVolumes {{what -all}}
88	protected method Disconnect {}
89	protected method DoResize {}
90	protected method FixLegend {}
91	protected method FixSettings {what {value ""}}
92	protected method Pan {option x y}
93	protected method Rebuild {}
94	protected method ReceiveData { args }
95	protected method ReceiveImage { args }
96	protected method ReceiveLegend { tf vmin vmax size }
97	protected method Rotate {option x y}
98	protected method SendCmd {string}
99	protected method SendTransferFuncs {}
100	protected method Slice {option args}
101	protected method SlicerTip {axis}
102	protected method Zoom {option}
103
104	# The following methods are only used by this class.
105	private method AddIsoMarker { x y }
106	private method BuildCameraTab {}
107	private method BuildCutplanesTab {}
108	private method BuildViewTab {}
109	private method BuildVolumeTab {}
110	private method ComputeTransferFunc { tf }
111	private method EventuallyResize { w h }
112	private method EventuallyResizeLegend { }
113	private method NameTransferFunc { dataobj comp }
114	private method PanCamera {}
115	private method ParseLevelsOption { tf levels }
116	private method ParseMarkersOption { tf markers }
117	private method volume { tag name }
118	private method GetVolumeInfo { w }
119
120	private variable _outbuf ;# buffer for outgoing commands
121
122	private variable _dlist "" ;# list of data objects
123	private variable _allDataObjs
124	private variable _obj2ovride ;# maps dataobj => style override
125	private variable _serverVols ;# contains all the dataobj-component
126	;# to volumes in the server
127	private variable _serverTfs ;# contains all the transfer functions
128	;# in the server.
129	private variable _recvdVols ;# list of data objs to send to server
130	private variable _vol2style ;# maps dataobj-component to transfunc
131	private variable _style2vols ;# maps tf back to list of
132	# dataobj-components using the tf.
133
134	private variable _click ;# info used for rotate operations
135	private variable _limits ;# autoscale min/max for all axes
136	private variable _view ;# view params for 3D view
137	private variable _isomarkers ;# array of isosurface level values 0..1
138	private common _settings
139	# Array of transfer functions in server. If 0 the transfer has been
140	# defined but not loaded. If 1 the transfer function has been named
141	# and loaded.
142	private variable _activeTfs
143	private variable _first "" ;# This is the topmost volume.
144	private variable _buffering 0
145
146	# This
147	# indicates which isomarkers and transfer
148	# function to use when changing markers,
149	# opacity, or thickness.
150	common _downloadPopup ;# download options from popup
151	private common _hardcopy
152	private variable _width 0
153	private variable _height 0
154	private variable _resizePending 0
155	private variable _resizeLegendPending 0
156	}
157
158	itk::usual NanovisViewer {
159	keep -background -foreground -cursor -font
160	keep -plotbackground -plotforeground
161	}
162
163	# ----------------------------------------------------------------------
164	# CONSTRUCTOR
165	# ----------------------------------------------------------------------
166	itcl::body Rappture::NanovisViewer::constructor {hostlist args} {
167	set _serverType "nanovis"
168
169	# Draw legend event
170	$_dispatcher register !legend
171	$_dispatcher dispatch $this !legend "[itcl::code $this FixLegend]; list"
172
173	# Send transfer functions event
174	$_dispatcher register !send_transfunc
175	$_dispatcher dispatch $this !send_transfunc \
176	"[itcl::code $this SendTransferFuncs]; list"
177
178	# Rebuild event
179	$_dispatcher register !rebuild
180	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
181
182	# Resize event
183	$_dispatcher register !resize
184	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
185
186	set _outbuf ""
187
188	#
189	# Populate parser with commands handle incoming requests
190	#
191	$_parser alias image [itcl::code $this ReceiveImage]
192	$_parser alias legend [itcl::code $this ReceiveLegend]
193	$_parser alias data [itcl::code $this ReceiveData]
194
195	# Initialize the view to some default parameters.
196	array set _view {
197	theta 45
198	phi 45
199	psi 0
200	zoom 1.0
201	pan-x 0
202	pan-y 0
203	}
204	set _limits(vmin) 0.0
205	set _limits(vmax) 1.0
206
207	array set _settings [subst {
208	$this-pan-x $_view(pan-x)
209	$this-pan-y $_view(pan-y)
210	$this-phi $_view(phi)
211	$this-psi $_view(psi)
212	$this-theta $_view(theta)
213	$this-volume 1
214	$this-xcutplane 0
215	$this-xcutposition 0
216	$this-ycutplane 0
217	$this-ycutposition 0
218	$this-zcutplane 0
219	$this-zcutposition 0
220	$this-zoom $_view(zoom)
221	}]
222
223	itk_component add 3dview {
224	label $itk_component(plotarea).view -image $_image(plot) \
225	-highlightthickness 0 -borderwidth 0
226	} {
227	usual
228	ignore -highlightthickness -borderwidth -background
229	}
230
231	set f [$itk_component(main) component controls]
232	itk_component add reset {
233	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
234	-highlightthickness 0 \
235	-image [Rappture::icon reset-view] \
236	-command [itcl::code $this Zoom reset]
237	} {
238	usual
239	ignore -highlightthickness
240	}
241	pack $itk_component(reset) -side top -padx 2 -pady 2
242	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
243
244	itk_component add zoomin {
245	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
246	-highlightthickness 0 \
247	-image [Rappture::icon zoom-in] \
248	-command [itcl::code $this Zoom in]
249	} {
250	usual
251	ignore -highlightthickness
252	}
253	pack $itk_component(zoomin) -side top -padx 2 -pady 2
254	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
255
256	itk_component add zoomout {
257	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
258	-highlightthickness 0 \
259	-image [Rappture::icon zoom-out] \
260	-command [itcl::code $this Zoom out]
261	} {
262	usual
263	ignore -highlightthickness
264	}
265	pack $itk_component(zoomout) -side top -padx 2 -pady 2
266	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
267
268	itk_component add volume {
269	Rappture::PushButton $f.volume \
270	-onimage [Rappture::icon volume-on] \
271	-offimage [Rappture::icon volume-off] \
272	-command [itcl::code $this FixSettings volume] \
273	-variable [itcl::scope _settings($this-volume)]
274	}
275	$itk_component(volume) select
276	Rappture::Tooltip::for $itk_component(volume) \
277	"Toggle the volume cloud on/off"
278	pack $itk_component(volume) -padx 2 -pady 2
279
280	BuildViewTab
281	BuildVolumeTab
282	BuildCutplanesTab
283	BuildCameraTab
284
285	# Legend
286
287	set _image(legend) [image create photo]
288	itk_component add legend {
289	canvas $itk_component(plotarea).legend -height 50 -highlightthickness 0
290	} {
291	usual
292	ignore -highlightthickness
293	rename -background -plotbackground plotBackground Background
294	}
295	bind $itk_component(legend) <Configure> \
296	[itcl::code $this EventuallyResizeLegend]
297
298	# Hack around the Tk panewindow. The problem is that the requested
299	# size of the 3d view isn't set until an image is retrieved from
300	# the server. So the panewindow uses the tiny size.
301	set w 10000
302	pack forget $itk_component(3dview)
303	blt::table $itk_component(plotarea) \
304	0,0 $itk_component(3dview) -fill both -reqwidth $w \
305	1,0 $itk_component(legend) -fill x
306	blt::table configure $itk_component(plotarea) r1 -resize none
307
308	# Bindings for rotation via mouse
309	bind $itk_component(3dview) <ButtonPress-1> \
310	[itcl::code $this Rotate click %x %y]
311	bind $itk_component(3dview) <B1-Motion> \
312	[itcl::code $this Rotate drag %x %y]
313	bind $itk_component(3dview) <ButtonRelease-1> \
314	[itcl::code $this Rotate release %x %y]
315	bind $itk_component(3dview) <Configure> \
316	[itcl::code $this EventuallyResize %w %h]
317
318	# Bindings for panning via mouse
319	bind $itk_component(3dview) <ButtonPress-2> \
320	[itcl::code $this Pan click %x %y]
321	bind $itk_component(3dview) <B2-Motion> \
322	[itcl::code $this Pan drag %x %y]
323	bind $itk_component(3dview) <ButtonRelease-2> \
324	[itcl::code $this Pan release %x %y]
325
326	# Bindings for panning via keyboard
327	bind $itk_component(3dview) <KeyPress-Left> \
328	[itcl::code $this Pan set -10 0]
329	bind $itk_component(3dview) <KeyPress-Right> \
330	[itcl::code $this Pan set 10 0]
331	bind $itk_component(3dview) <KeyPress-Up> \
332	[itcl::code $this Pan set 0 -10]
333	bind $itk_component(3dview) <KeyPress-Down> \
334	[itcl::code $this Pan set 0 10]
335	bind $itk_component(3dview) <Shift-KeyPress-Left> \
336	[itcl::code $this Pan set -2 0]
337	bind $itk_component(3dview) <Shift-KeyPress-Right> \
338	[itcl::code $this Pan set 2 0]
339	bind $itk_component(3dview) <Shift-KeyPress-Up> \
340	[itcl::code $this Pan set 0 -2]
341	bind $itk_component(3dview) <Shift-KeyPress-Down> \
342	[itcl::code $this Pan set 0 2]
343
344	# Bindings for zoom via keyboard
345	bind $itk_component(3dview) <KeyPress-Prior> \
346	[itcl::code $this Zoom out]
347	bind $itk_component(3dview) <KeyPress-Next> \
348	[itcl::code $this Zoom in]
349
350	bind $itk_component(3dview) <Enter> "focus $itk_component(3dview)"
351
352	if {[string equal "x11" [tk windowingsystem]]} {
353	# Bindings for zoom via mouse
354	bind $itk_component(3dview) <4> [itcl::code $this Zoom out]
355	bind $itk_component(3dview) <5> [itcl::code $this Zoom in]
356	}
357
358	set _image(download) [image create photo]
359
360	eval itk_initialize $args
361
362	Connect
363	}
364
365	# ----------------------------------------------------------------------
366	# DESTRUCTOR
367	# ----------------------------------------------------------------------
368	itcl::body Rappture::NanovisViewer::destructor {} {
369	$_dispatcher cancel !rebuild
370	$_dispatcher cancel !send_transfunc
371	$_dispatcher cancel !resize
372	image delete $_image(plot)
373	image delete $_image(legend)
374	image delete $_image(download)
375	array unset _settings $this-*
376	}
377
378	# ----------------------------------------------------------------------
379	# USAGE: add <dataobj> ?<settings>?
380	#
381	# Clients use this to add a data object to the plot. The optional
382	# <settings> are used to configure the plot. Allowed settings are
383	# -color, -brightness, -width, -linestyle, and -raise.
384	# ----------------------------------------------------------------------
385	itcl::body Rappture::NanovisViewer::add {dataobj {settings ""}} {
386	array set params {
387	-color auto
388	-width 1
389	-linestyle solid
390	-brightness 0
391	-raise 0
392	-description ""
393	-param ""
394	}
395	foreach {opt val} $settings {
396	if {![info exists params($opt)]} {
397	error "bad setting \"$opt\": should be [join [lsort [array names params]] {, }]"
398	}
399	set params($opt) $val
400	}
401	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
402	# can't handle -autocolors yet
403	set params(-color) black
404	}
405	set pos [lsearch -exact $dataobj $_dlist]
406	if {$pos < 0} {
407	lappend _dlist $dataobj
408	set _allDataObjs($dataobj) 1
409	set _obj2ovride($dataobj-color) $params(-color)
410	set _obj2ovride($dataobj-width) $params(-width)
411	set _obj2ovride($dataobj-raise) $params(-raise)
412	$_dispatcher event -idle !rebuild
413	}
414	}
415
416	# ----------------------------------------------------------------------
417	# USAGE: get ?-objects?
418	# USAGE: get ?-image 3dview\|legend?
419	#
420	# Clients use this to query the list of objects being plotted, in
421	# order from bottom to top of this result. The optional "-image"
422	# flag can also request the internal images being shown.
423	# ----------------------------------------------------------------------
424	itcl::body Rappture::NanovisViewer::get {args} {
425	if {[llength $args] == 0} {
426	set args "-objects"
427	}
428
429	set op [lindex $args 0]
430	switch -- $op {
431	-objects {
432	# put the dataobj list in order according to -raise options
433	set dlist $_dlist
434	foreach obj $dlist {
435	if {[info exists _obj2ovride($obj-raise)] && $_obj2ovride($obj-raise)} {
436	set i [lsearch -exact $dlist $obj]
437	if {$i >= 0} {
438	set dlist [lreplace $dlist $i $i]
439	lappend dlist $obj
440	}
441	}
442	}
443	return $dlist
444	}
445	-image {
446	if {[llength $args] != 2} {
447	error "wrong # args: should be \"get -image 3dview\|legend\""
448	}
449	switch -- [lindex $args end] {
450	3dview {
451	return $_image(plot)
452	}
453	legend {
454	return $_image(legend)
455	}
456	default {
457	error "bad image name \"[lindex $args end]\": should be 3dview or legend"
458	}
459	}
460	}
461	default {
462	error "bad option \"$op\": should be -objects or -image"
463	}
464	}
465	}
466
467	# ----------------------------------------------------------------------
468	# USAGE: delete ?<dataobj1> <dataobj2> ...?
469	#
470	# Clients use this to delete a dataobj from the plot. If no dataobjs
471	# are specified, then all dataobjs are deleted. No data objects are
472	# deleted. They are only removed from the display list.
473	#
474	# ----------------------------------------------------------------------
475	itcl::body Rappture::NanovisViewer::delete {args} {
476	if {[llength $args] == 0} {
477	set args $_dlist
478	}
479	# Delete all specified dataobjs
480	set changed 0
481	foreach dataobj $args {
482	set pos [lsearch -exact $_dlist $dataobj]
483	if { $pos >= 0 } {
484	set _dlist [lreplace $_dlist $pos $pos]
485	array unset _limits $dataobj*
486	array unset _obj2ovride $dataobj-*
487	array unset _vol2style $dataobj-*
488	set changed 1
489	}
490	}
491	# If anything changed, then rebuild the plot
492	if {$changed} {
493	$_dispatcher event -idle !rebuild
494	}
495	}
496
497	# ----------------------------------------------------------------------
498	# USAGE: scale ?<data1> <data2> ...?
499	#
500	# Sets the default limits for the overall plot according to the
501	# limits of the data for all of the given <data> objects. This
502	# accounts for all objects--even those not showing on the screen.
503	# Because of this, the limits are appropriate for all objects as
504	# the user scans through data in the ResultSet viewer.
505	# ----------------------------------------------------------------------
506	itcl::body Rappture::NanovisViewer::scale {args} {
507	foreach val {xmin xmax ymin ymax zmin zmax vmin vmax} {
508	set _limits($val) ""
509	}
510	foreach obj $args {
511	foreach axis {x y z v} {
512
513	foreach { min max } [$obj limits $axis] break
514
515	if {"" != $min && "" != $max} {
516	if {"" == $_limits(${axis}min)} {
517	set _limits(${axis}min) $min
518	set _limits(${axis}max) $max
519	} else {
520	if {$min < $_limits(${axis}min)} {
521	set _limits(${axis}min) $min
522	}
523	if {$max > $_limits(${axis}max)} {
524	set _limits(${axis}max) $max
525	}
526	}
527	}
528	}
529	}
530	}
531
532	# ----------------------------------------------------------------------
533	# USAGE: download coming
534	# USAGE: download controls <downloadCommand>
535	# USAGE: download now
536	#
537	# Clients use this method to create a downloadable representation
538	# of the plot. Returns a list of the form {ext string}, where
539	# "ext" is the file extension (indicating the type of data) and
540	# "string" is the data itself.
541	# ----------------------------------------------------------------------
542	itcl::body Rappture::NanovisViewer::download {option args} {
543	switch $option {
544	coming {
545	if {[catch {
546	blt::winop snap $itk_component(plotarea) $_image(download)
547	}]} {
548	$_image(download) configure -width 1 -height 1
549	$_image(download) put #000000
550	}
551	}
552	controls {
553	# no controls for this download yet
554	return ""
555	}
556	now {
557	# Get the image data (as base64) and decode it back to binary.
558	# This is better than writing to temporary files. When we switch
559	# to the BLT picture image it won't be necessary to decode the
560	# image data.
561	if { [image width $_image(plot)] > 0 &&
562	[image height $_image(plot)] > 0 } {
563	set bytes [$_image(plot) data -format "jpeg -quality 100"]
564	set bytes [Rappture::encoding::decode -as b64 $bytes]
565	return [list .jpg $bytes]
566	}
567	return ""
568	}
569	default {
570	error "bad option \"$option\": should be coming, controls, now"
571	}
572	}
573	}
574
575	# ----------------------------------------------------------------------
576	# USAGE: Connect ?<host:port>,<host:port>...?
577	#
578	# Clients use this method to establish a connection to a new
579	# server, or to reestablish a connection to the previous server.
580	# Any existing connection is automatically closed.
581	# ----------------------------------------------------------------------
582	itcl::body Rappture::NanovisViewer::Connect {} {
583	set _hosts [GetServerList "nanovis"]
584	if { "" == $_hosts } {
585	return 0
586	}
587	set result [VisViewer::Connect $_hosts]
588	if { $result } {
589	set w [winfo width $itk_component(3dview)]
590	set h [winfo height $itk_component(3dview)]
591	EventuallyResize $w $h
592	}
593	return $result
594	}
595
596	#
597	# isconnected --
598	#
599	# Indicates if we are currently connected to the visualization server.
600	#
601	itcl::body Rappture::NanovisViewer::isconnected {} {
602	return [VisViewer::IsConnected]
603	}
604
605	#
606	# disconnect --
607	#
608	itcl::body Rappture::NanovisViewer::disconnect {} {
609	Disconnect
610	}
611
612	#
613	# Disconnect --
614	#
615	# Clients use this method to disconnect from the current rendering
616	# server.
617	#
618	itcl::body Rappture::NanovisViewer::Disconnect {} {
619	VisViewer::Disconnect
620
621	# disconnected -- no more data sitting on server
622	set _outbuf ""
623	array unset _serverVols
624	}
625
626	#
627	# sendto --
628	#
629	itcl::body Rappture::NanovisViewer::sendto { bytes } {
630	SendBytes "$bytes\n"
631	}
632
633	#
634	# SendCmd
635	#
636	# Send commands off to the rendering server. If we're currently
637	# sending data objects to the server, buffer the commands to be
638	# sent later.
639	#
640	itcl::body Rappture::NanovisViewer::SendCmd {string} {
641	if { $_buffering } {
642	append _outbuf $string "\n"
643	} else {
644	foreach line [split $string \n] {
645	SendEcho >>line $line
646	}
647	SendBytes "$string\n"
648	}
649	}
650
651
652	# ----------------------------------------------------------------------
653	# USAGE: SendTransferFuncs
654	# ----------------------------------------------------------------------
655	itcl::body Rappture::NanovisViewer::SendTransferFuncs {} {
656	if { $_first == "" } {
657	puts stderr "first not set"
658	return
659	}
660	# Insure that the global opacity and thickness settings (in the slider
661	# settings widgets) are used for the active transfer-function. Update
662	# the values in the _settings varible.
663	set opacity [expr { double($_settings($this-opacity)) * 0.01 }]
664	# Scale values between 0.00001 and 0.01000
665	set thickness [expr {double($_settings($this-thickness)) * 0.0001}]
666
667	foreach vol [CurrentVolumes] {
668	if { ![info exists _serverVols($vol)] \|\| !$_serverVols($vol) } {
669	# The volume hasn't reached the server yet. How did we get
670	# here?
671	continue
672	}
673	if { ![info exists _vol2style($vol)] } {
674	puts stderr "unknown volume $vol"
675	continue; # How does this happen?
676	}
677	set tf $_vol2style($vol)
678	set _settings($this-$tf-opacity) $opacity
679	set _settings($this-$tf-thickness) $thickness
680	ComputeTransferFunc $tf
681	# FIXME: Need to the send information as to what transfer functions
682	# to update so that we only update the transfer function
683	# as necessary. Right now, all transfer functions are
684	# updated. This makes moving the isomarker slider chunky.
685	if { ![info exists _activeTfs($tf)] \|\| !$_activeTfs($tf) } {
686	set _activeTfs($tf) 1
687	}
688	SendCmd "volume shading transfunc $tf $vol"
689	}
690	FixLegend
691	}
692
693	# ----------------------------------------------------------------------
694	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
695	#
696	# Invoked automatically whenever the "image" command comes in from
697	# the rendering server. Indicates that binary image data with the
698	# specified <size> will follow.
699	# ----------------------------------------------------------------------
700	itcl::body Rappture::NanovisViewer::ReceiveImage { args } {
701	array set info {
702	-token "???"
703	-bytes 0
704	-type image
705	}
706	array set info $args
707	set bytes [ReceiveBytes $info(-bytes)]
708	ReceiveEcho <<line "<read $info(-bytes) bytes"
709	if { $info(-type) == "image" } {
710	ReceiveEcho "for [image width $_image(plot)]x[image height $_image(plot)] image>"
711	$_image(plot) configure -data $bytes
712	} elseif { $info(type) == "print" } {
713	set tag $this-print-$info(-token)
714	set _hardcopy($tag) $bytes
715	}
716	}
717
718	#
719	# ReceiveLegend --
720	#
721	# The procedure is the response from the render server to each "legend"
722	# command. The server sends back a "legend" command invoked our
723	# the slave interpreter. The purpose is to collect data of the image
724	# representing the legend in the canvas. In addition, the isomarkers
725	# of the active transfer function are displayed.
726	#
727	# I don't know is this is the right place to display the isomarkers.
728	# I don't know all the different paths used to draw the plot. There's
729	# "Rebuild", "add", etc.
730	#
731	itcl::body Rappture::NanovisViewer::ReceiveLegend { tf vmin vmax size } {
732	if { ![isconnected] } {
733	return
734	}
735	set bytes [ReceiveBytes $size]
736	$_image(legend) configure -data $bytes
737	ReceiveEcho <<line "<read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
738
739	set c $itk_component(legend)
740	set w [winfo width $c]
741	set h [winfo height $c]
742	set lx 10
743	set ly [expr {$h - 1}]
744	if {"" == [$c find withtag transfunc]} {
745	$c create image 10 10 -anchor nw \
746	-image $_image(legend) -tags transfunc
747	$c create text $lx $ly -anchor sw \
748	-fill $itk_option(-plotforeground) -tags "limits vmin"
749	$c create text [expr {$w-$lx}] $ly -anchor se \
750	-fill $itk_option(-plotforeground) -tags "limits vmax"
751	$c lower transfunc
752	$c bind transfunc <ButtonRelease-1> \
753	[itcl::code $this AddIsoMarker %x %y]
754	}
755	# Display the markers used by the active transfer function.
756
757	array set limits [limits $tf]
758	$c itemconfigure vmin -text [format %.2g $limits(min)]
759	$c coords vmin $lx $ly
760
761	$c itemconfigure vmax -text [format %.2g $limits(max)]
762	$c coords vmax [expr {$w-$lx}] $ly
763
764	if { [info exists _isomarkers($tf)] } {
765	foreach m $_isomarkers($tf) {
766	$m visible yes
767	}
768	}
769
770	# The colormap may have changed. Resync the slicers with the colormap.
771	set vols [CurrentVolumes -cutplanes]
772	SendCmd "volume data state $_settings($this-volume) $vols"
773
774	# Adjust the cutplane for only the first component in the topmost volume
775	# (i.e. the first volume designated in the field).
776	set vol [lindex $vols 0]
777	foreach axis {x y z} {
778	# Turn off cutplanes for all volumes
779	SendCmd "cutplane state 0 $axis"
780	if { $_settings($this-${axis}cutplane) } {
781	# Turn on cutplane for this particular volume and set the position
782	SendCmd "cutplane state 1 $axis $vol"
783	set pos [expr {0.01*$_settings($this-${axis}cutposition)}]
784	SendCmd "cutplane position $pos $axis $vol"
785	}
786	}
787	}
788
789	#
790	# ReceiveData --
791	#
792	# The procedure is the response from the render server to each "data
793	# follows" command. The server sends back a "data" command invoked our
794	# the slave interpreter. The purpose is to collect the min/max of the
795	# volume sent to the render server. Since the client (nanovisviewer)
796	# doesn't parse 3D data formats, we rely on the server (nanovis) to
797	# tell us what the limits are. Once we've received the limits to all
798	# the data we've sent (tracked by _recvdVols) we can then determine
799	# what the transfer functions are for these volumes.
800	#
801	#
802	# Note: There is a considerable tradeoff in having the server report
803	# back what the data limits are. It means that much of the code
804	# having to do with transfer-functions has to wait for the data
805	# to come back, since the isomarkers are calculated based upon
806	# the data limits. The client code is much messier because of
807	# this. The alternative is to parse any of the 3D formats on the
808	# client side.
809	#
810	itcl::body Rappture::NanovisViewer::ReceiveData { args } {
811	if { ![isconnected] } {
812	return
813	}
814	# Arguments from server are name value pairs. Stuff them in an array.
815	array set info $args
816
817	set tag $info(tag)
818	set parts [split $tag -]
819
820	#
821	# Volumes don't exist until we're told about them.
822	#
823	set dataobj [lindex $parts 0]
824	set _serverVols($tag) 1
825	if { $_settings($this-volume) && $dataobj == $_first } {
826	SendCmd "volume state 1 $tag"
827	}
828	set _limits($tag-min) $info(min); # Minimum value of the volume.
829	set _limits($tag-max) $info(max); # Maximum value of the volume.
830	set _limits(vmin) $info(vmin); # Overall minimum value.
831	set _limits(vmax) $info(vmax); # Overall maximum value.
832
833	unset _recvdVols($tag)
834	if { [array size _recvdVols] == 0 } {
835	# The active transfer function is by default the first component of
836	# the first data object. This assumes that the data is always
837	# successfully transferred.
838	updatetransferfuncs
839	}
840	}
841
842	# ----------------------------------------------------------------------
843	# USAGE: Rebuild
844	#
845	# Called automatically whenever something changes that affects the
846	# data in the widget. Clears any existing data and rebuilds the
847	# widget to display new data.
848	# ----------------------------------------------------------------------
849	itcl::body Rappture::NanovisViewer::Rebuild {} {
850
851	# Turn on buffering of commands to the server. We don't want to
852	# be preempted by a server disconnect/reconnect (which automatically
853	# generates a new call to Rebuild).
854	set _buffering 1
855
856	# Hide all the isomarkers. Can't remove them. Have to remember the
857	# settings since the user may have created/deleted/moved markers.
858
859	foreach tf [array names _isomarkers] {
860	foreach m $_isomarkers($tf) {
861	$m visible no
862	}
863	}
864
865	set w [winfo width $itk_component(3dview)]
866	set h [winfo height $itk_component(3dview)]
867	EventuallyResize $w $h
868
869	foreach dataobj [get] {
870	foreach comp [$dataobj components] {
871	set vol $dataobj-$comp
872	if { ![info exists _serverVols($vol)] } {
873	# Send the data as one huge base64-encoded mess -- yuck!
874	set data [$dataobj values $comp]
875	set nbytes [string length $data]
876	append _outbuf "volume data follows $nbytes $vol\n"
877	append _outbuf $data
878	set _recvdVols($vol) 1
879	set _serverVols($vol) 0
880	}
881	NameTransferFunc $dataobj $comp
882	}
883	}
884	#
885	# Reset the camera and other view parameters
886	#
887
888	set _settings($this-theta) $_view(theta)
889	set _settings($this-phi) $_view(phi)
890	set _settings($this-psi) $_view(psi)
891	set _settings($this-pan-x) $_view(pan-x)
892	set _settings($this-pan-y) $_view(pan-y)
893	set _settings($this-zoom) $_view(zoom)
894
895	set xyz [Euler2XYZ $_view(theta) $_view(phi) $_view(psi)]
896	SendCmd "camera angle $xyz"
897	PanCamera
898	SendCmd "camera zoom $_view(zoom)"
899	FixSettings light
900	FixSettings transp
901	FixSettings isosurface
902	FixSettings grid
903	FixSettings axes
904	FixSettings outline
905
906	# nothing to send -- activate the proper ivol
907	SendCmd "volume state 0"
908	set _first [lindex [get] 0]
909	if {"" != $_first} {
910	set axis [$_first hints updir]
911	if { "" != $axis } {
912	SendCmd "up $axis"
913	}
914	set location [$_first hints camera]
915	if { $location != "" } {
916	array set _view $location
917	}
918	set vols [array names _serverVols $_first-*]
919	if { $vols != "" } {
920	SendCmd "volume state 1 $vols"
921	}
922	}
923	# If the first volume already exists on the server, then make sure we
924	# display the proper transfer function in the legend.
925	set comp [lindex [$_first components] 0]
926	if { [info exists _serverVols($_first-$comp)] } {
927	updatetransferfuncs
928	}
929	foreach axis {x y z} {
930	# Turn off cutplanes for all volumes
931	SendCmd "cutplane state 0 $axis"
932	}
933	set _buffering 0; # Turn off buffering.
934	# Actually write the commands to the server socket. If it fails, we don't
935	# care. We're finished here.
936	blt::busy hold $itk_component(hull)
937	SendBytes $_outbuf;
938	blt::busy release $itk_component(hull)
939	set _outbuf ""; # Clear the buffer.
940	}
941
942	# ----------------------------------------------------------------------
943	# USAGE: CurrentVolumes ?-cutplanes?
944	#
945	# Returns a list of volume server IDs for the current volume being
946	# displayed. This is normally a single ID, but it might be a list
947	# of IDs if the current data object has multiple components.
948	# ----------------------------------------------------------------------
949	itcl::body Rappture::NanovisViewer::CurrentVolumes {{what -all}} {
950	set rlist ""
951	if { $_first == "" } {
952	return
953	}
954	foreach comp [$_first components] {
955	set vol $_first-$comp
956	if { [info exists _serverVols($vol)] && $_serverVols($vol) } {
957	array set style {
958	-cutplanes 1
959	}
960	array set style [lindex [$_first components -style $comp] 0]
961	if { $what != "-cutplanes" \|\| $style(-cutplanes) } {
962	lappend rlist $vol
963	}
964	}
965	}
966	return $rlist
967	}
968
969	# ----------------------------------------------------------------------
970	# USAGE: Zoom in
971	# USAGE: Zoom out
972	# USAGE: Zoom reset
973	#
974	# Called automatically when the user clicks on one of the zoom
975	# controls for this widget. Changes the zoom for the current view.
976	# ----------------------------------------------------------------------
977	itcl::body Rappture::NanovisViewer::Zoom {option} {
978	switch -- $option {
979	"in" {
980	set _view(zoom) [expr {$_view(zoom)*1.25}]
981	set _settings($this-zoom) $_view(zoom)
982	}
983	"out" {
984	set _view(zoom) [expr {$_view(zoom)*0.8}]
985	set _settings($this-zoom) $_view(zoom)
986	}
987	"reset" {
988	array set _view {
989	theta 45
990	phi 45
991	psi 0
992	zoom 1.0
993	pan-x 0
994	pan-y 0
995	}
996	if { $_first != "" } {
997	set location [$_first hints camera]
998	if { $location != "" } {
999	array set _view $location
1000	}
1001	}
1002	set xyz [Euler2XYZ $_view(theta) $_view(phi) $_view(psi)]
1003	SendCmd "camera angle $xyz"
1004	PanCamera
1005	set _settings($this-theta) $_view(theta)
1006	set _settings($this-phi) $_view(phi)
1007	set _settings($this-psi) $_view(psi)
1008	set _settings($this-pan-x) $_view(pan-x)
1009	set _settings($this-pan-y) $_view(pan-y)
1010	set _settings($this-zoom) $_view(zoom)
1011	}
1012	}
1013	SendCmd "camera zoom $_view(zoom)"
1014	}
1015
1016	itcl::body Rappture::NanovisViewer::PanCamera {} {
1017	#set x [expr ($_view(pan-x)) / $_limits(xrange)]
1018	#set y [expr ($_view(pan-y)) / $_limits(yrange)]
1019	set x $_view(pan-x)
1020	set y $_view(pan-y)
1021	SendCmd "camera pan $x $y"
1022	}
1023
1024
1025	# ----------------------------------------------------------------------
1026	# USAGE: Rotate click <x> <y>
1027	# USAGE: Rotate drag <x> <y>
1028	# USAGE: Rotate release <x> <y>
1029	#
1030	# Called automatically when the user clicks/drags/releases in the
1031	# plot area. Moves the plot according to the user's actions.
1032	# ----------------------------------------------------------------------
1033	itcl::body Rappture::NanovisViewer::Rotate {option x y} {
1034	switch -- $option {
1035	click {
1036	$itk_component(3dview) configure -cursor fleur
1037	set _click(x) $x
1038	set _click(y) $y
1039	set _click(theta) $_view(theta)
1040	set _click(phi) $_view(phi)
1041	}
1042	drag {
1043	if {[array size _click] == 0} {
1044	Rotate click $x $y
1045	} else {
1046	set w [winfo width $itk_component(3dview)]
1047	set h [winfo height $itk_component(3dview)]
1048	if {$w <= 0 \|\| $h <= 0} {
1049	return
1050	}
1051
1052	if {[catch {
1053	# this fails sometimes for no apparent reason
1054	set dx [expr {double($x-$_click(x))/$w}]
1055	set dy [expr {double($y-$_click(y))/$h}]
1056	}]} {
1057	return
1058	}
1059
1060	#
1061	# Rotate the camera in 3D
1062	#
1063	if {$_view(psi) > 90 \|\| $_view(psi) < -90} {
1064	# when psi is flipped around, theta moves backwards
1065	set dy [expr {-$dy}]
1066	}
1067	set theta [expr {$_view(theta) - $dy*180}]
1068	while {$theta < 0} { set theta [expr {$theta+180}] }
1069	while {$theta > 180} { set theta [expr {$theta-180}] }
1070
1071	if {abs($theta) >= 30 && abs($theta) <= 160} {
1072	set phi [expr {$_view(phi) - $dx*360}]
1073	while {$phi < 0} { set phi [expr {$phi+360}] }
1074	while {$phi > 360} { set phi [expr {$phi-360}] }
1075	set psi $_view(psi)
1076	} else {
1077	set phi $_view(phi)
1078	set psi [expr {$_view(psi) - $dx*360}]
1079	while {$psi < -180} { set psi [expr {$psi+360}] }
1080	while {$psi > 180} { set psi [expr {$psi-360}] }
1081	}
1082
1083	set _view(theta) $theta
1084	set _view(phi) $phi
1085	set _view(psi) $psi
1086	set xyz [Euler2XYZ $theta $phi $psi]
1087	set _settings($this-theta) $_view(theta)
1088	set _settings($this-phi) $_view(phi)
1089	set _settings($this-psi) $_view(psi)
1090	SendCmd "camera angle $xyz"
1091	set _click(x) $x
1092	set _click(y) $y
1093	}
1094	}
1095	release {
1096	Rotate drag $x $y
1097	$itk_component(3dview) configure -cursor ""
1098	catch {unset _click}
1099	}
1100	default {
1101	error "bad option \"$option\": should be click, drag, release"
1102	}
1103	}
1104	}
1105
1106	# ----------------------------------------------------------------------
1107	# USAGE: $this Pan click x y
1108	# $this Pan drag x y
1109	# $this Pan release x y
1110	#
1111	# Called automatically when the user clicks on one of the zoom
1112	# controls for this widget. Changes the zoom for the current view.
1113	# ----------------------------------------------------------------------
1114	itcl::body Rappture::NanovisViewer::Pan {option x y} {
1115	# Experimental stuff
1116	set w [winfo width $itk_component(3dview)]
1117	set h [winfo height $itk_component(3dview)]
1118	if { $option == "set" } {
1119	set x [expr $x / double($w)]
1120	set y [expr $y / double($h)]
1121	set _view(pan-x) [expr $_view(pan-x) + $x]
1122	set _view(pan-y) [expr $_view(pan-y) + $y]
1123	PanCamera
1124	set _settings($this-pan-x) $_view(pan-x)
1125	set _settings($this-pan-y) $_view(pan-y)
1126	return
1127	}
1128	if { $option == "click" } {
1129	set _click(x) $x
1130	set _click(y) $y
1131	$itk_component(3dview) configure -cursor hand1
1132	}
1133	if { $option == "drag" \|\| $option == "release" } {
1134	set dx [expr ($_click(x) - $x)/double($w)]
1135	set dy [expr ($_click(y) - $y)/double($h)]
1136	set _click(x) $x
1137	set _click(y) $y
1138	set _view(pan-x) [expr $_view(pan-x) - $dx]
1139	set _view(pan-y) [expr $_view(pan-y) - $dy]
1140	PanCamera
1141	set _settings($this-pan-x) $_view(pan-x)
1142	set _settings($this-pan-y) $_view(pan-y)
1143	}
1144	if { $option == "release" } {
1145	$itk_component(3dview) configure -cursor ""
1146	}
1147	}
1148
1149	# ----------------------------------------------------------------------
1150	# USAGE: FixSettings <what> ?<value>?
1151	#
1152	# Used internally to update rendering settings whenever parameters
1153	# change in the popup settings panel. Sends the new settings off
1154	# to the back end.
1155	# ----------------------------------------------------------------------
1156	itcl::body Rappture::NanovisViewer::FixSettings {what {value ""}} {
1157	switch -- $what {
1158	light {
1159	if {[isconnected]} {
1160	set val $_settings($this-light)
1161	set sval [expr {0.1*$val}]
1162	SendCmd "volume shading diffuse $sval"
1163	set sval [expr {sqrt($val+1.0)}]
1164	SendCmd "volume shading specular $sval"
1165	}
1166	}
1167	transp {
1168	if {[isconnected]} {
1169	set val $_settings($this-transp)
1170	set sval [expr {0.2*$val+1}]
1171	SendCmd "volume shading opacity $sval"
1172	}
1173	}
1174	opacity {
1175	if {[isconnected] && [array size _activeTfs] > 0 } {
1176	set val $_settings($this-opacity)
1177	set sval [expr { 0.01 * double($val) }]
1178	foreach tf [array names _activeTfs] {
1179	set _settings($this-$tf-opacity) $sval
1180	set _activeTfs($tf) 0
1181	}
1182	updatetransferfuncs
1183	}
1184	}
1185
1186	thickness {
1187	if {[isconnected] && [array names _activeTfs] > 0 } {
1188	set val $_settings($this-thickness)
1189	# Scale values between 0.00001 and 0.01000
1190	set sval [expr {0.0001*double($val)}]
1191	foreach tf [array names _activeTfs] {
1192	set _settings($this-$tf-thickness) $sval
1193	set _activeTfs($tf) 0
1194	}
1195	updatetransferfuncs
1196	}
1197	}
1198	"outline" {
1199	if {[isconnected]} {
1200	SendCmd "volume outline state $_settings($this-outline)"
1201	}
1202	}
1203	"isosurface" {
1204	if {[isconnected]} {
1205	SendCmd "volume shading isosurface $_settings($this-isosurface)"
1206	}
1207	}
1208	"grid" {
1209	if { [isconnected] } {
1210	SendCmd "grid visible $_settings($this-grid)"
1211	}
1212	}
1213	"axes" {
1214	if { [isconnected] } {
1215	SendCmd "axis visible $_settings($this-axes)"
1216	}
1217	}
1218	"legend" {
1219	if { $_settings($this-legend) } {
1220	blt::table $itk_component(plotarea) \
1221	0,0 $itk_component(3dview) -fill both \
1222	1,0 $itk_component(legend) -fill x
1223	blt::table configure $itk_component(plotarea) r1 -resize none
1224	} else {
1225	blt::table forget $itk_component(legend)
1226	}
1227	}
1228	"volume" {
1229	if { [isconnected] } {
1230	set vols [CurrentVolumes -cutplanes]
1231	SendCmd "volume data state $_settings($this-volume) $vols"
1232	}
1233	}
1234	"xcutplane" - "ycutplane" - "zcutplane" {
1235	set axis [string range $what 0 0]
1236	set bool $_settings($this-$what)
1237	if { [isconnected] } {
1238	set vols [CurrentVolumes -cutplanes]
1239	set vol [lindex $vols 0]
1240	SendCmd "cutplane state $bool $axis $vol"
1241	}
1242	if { $bool } {
1243	$itk_component(${axis}CutScale) configure -state normal \
1244	-troughcolor white
1245	} else {
1246	$itk_component(${axis}CutScale) configure -state disabled \
1247	-troughcolor grey82
1248	}
1249	}
1250	default {
1251	error "don't know how to fix $what"
1252	}
1253	}
1254	}
1255
1256	# ----------------------------------------------------------------------
1257	# USAGE: FixLegend
1258	#
1259	# Used internally to update the legend area whenever it changes size
1260	# or when the field changes. Asks the server to send a new legend
1261	# for the current field.
1262	# ----------------------------------------------------------------------
1263	itcl::body Rappture::NanovisViewer::FixLegend {} {
1264	set _resizeLegendPending 0
1265	set lineht [font metrics $itk_option(-font) -linespace]
1266	set w [expr {$_width-20}]
1267	set h [expr {[winfo height $itk_component(legend)]-20-$lineht}]
1268	if {$w > 0 && $h > 0 && [array names _activeTfs] > 0 && $_first != "" } {
1269	set vol [lindex [CurrentVolumes] 0]
1270	if { [info exists _vol2style($vol)] } {
1271	SendCmd "legend $_vol2style($vol) $w $h"
1272	}
1273	} else {
1274	# Can't do this as this will remove the items associated with the
1275	# isomarkers.
1276
1277	#$itk_component(legend) delete all
1278	}
1279	}
1280
1281	#
1282	# NameTransferFunc --
1283	#
1284	# Creates a transfer function name based on the <style> settings in the
1285	# library run.xml file. This placeholder will be used later to create
1286	# and send the actual transfer function once the data info has been sent
1287	# to us by the render server. [We won't know the volume limits until the
1288	# server parses the 3D data and sends back the limits via ReceiveData.]
1289	#
1290	# FIXME: The current way we generate transfer-function names completely
1291	# ignores the -markers option. The problem is that we are forced
1292	# to compute the name from an increasing complex set of values:
1293	# color, levels, marker, opacity. I think we're stuck doing it
1294	# now.
1295	#
1296	itcl::body Rappture::NanovisViewer::NameTransferFunc { dataobj comp } {
1297	array set style {
1298	-color rainbow
1299	-levels 6
1300	-opacity 1.0
1301	}
1302	array set style [lindex [$dataobj components -style $comp] 0]
1303	set tf "$style(-color):$style(-levels):$style(-opacity)"
1304	set _vol2style($dataobj-$comp) $tf
1305	lappend _style2vols($tf) $dataobj-$comp
1306	return $tf
1307	}
1308
1309	#
1310	# ComputeTransferFunc --
1311	#
1312	# Computes and sends the transfer function to the render server. It's
1313	# assumed that the volume data limits are known and that the global
1314	# transfer-functions slider values have be setup. Both parts are
1315	# needed to compute the relative value (location) of the marker, and
1316	# the alpha map of the transfer function.
1317	#
1318	itcl::body Rappture::NanovisViewer::ComputeTransferFunc { tf } {
1319	array set style {
1320	-color rainbow
1321	-levels 6
1322	-opacity 1.0
1323	}
1324	foreach {dataobj comp} [split $_style2vols($tf) -] break
1325	array set style [lindex [$dataobj components -style $comp] 0]
1326
1327
1328	# We have to parse the style attributes for a volume using this
1329	# transfer-function once. This sets up the initial isomarkers for the
1330	# transfer function. The user may add/delete markers, so we have to
1331	# maintain a list of markers for each transfer-function. We use the one
1332	# of the volumes (the first in the list) using the transfer-function as a
1333	# reference.
1334	#
1335	# FIXME: The current way we generate transfer-function names completely
1336	# ignores the -markers option. The problem is that we are forced
1337	# to compute the name from an increasing complex set of values:
1338	# color, levels, marker, opacity. I think the cow's out of the
1339	# barn on this one.
1340
1341	if { ![info exists _isomarkers($tf)] } {
1342	# Have to defer creation of isomarkers until we have data limits
1343	if { [info exists style(-markers)] } {
1344	ParseMarkersOption $tf $style(-markers)
1345	} else {
1346	ParseLevelsOption $tf $style(-levels)
1347	}
1348	}
1349	if {$style(-color) == "rainbow"} {
1350	set style(-color) "white:yellow:green:cyan:blue:magenta"
1351	}
1352	set clist [split $style(-color) :]
1353	set cmap "0.0 [Color2RGB white] "
1354	for {set i 0} {$i < [llength $clist]} {incr i} {
1355	set x [expr {double($i+1)/([llength $clist]+1)}]
1356	set color [lindex $clist $i]
1357	append cmap "$x [Color2RGB $color] "
1358	}
1359	append cmap "1.0 [Color2RGB $color]"
1360
1361	set tag $this-$tf
1362	if { ![info exists _settings($tag-opacity)] } {
1363	set _settings($tag-opacity) $style(-opacity)
1364	}
1365	set max $_settings($tag-opacity)
1366
1367	set isovalues {}
1368	foreach m $_isomarkers($tf) {
1369	lappend isovalues [$m relval]
1370	}
1371	# Sort the isovalues
1372	set isovalues [lsort -real $isovalues]
1373
1374	if { ![info exists _settings($tag-thickness)]} {
1375	set _settings($tag-thickness) 0.05
1376	}
1377	set delta $_settings($tag-thickness)
1378
1379	set first [lindex $isovalues 0]
1380	set last [lindex $isovalues end]
1381	set wmap ""
1382	if { $first == "" \|\| $first != 0.0 } {
1383	lappend wmap 0.0 0.0
1384	}
1385	foreach x $isovalues {
1386	set x1 [expr {$x-$delta-0.00001}]
1387	set x2 [expr {$x-$delta}]
1388	set x3 [expr {$x+$delta}]
1389	set x4 [expr {$x+$delta+0.00001}]
1390	if { $x1 < 0.0 } {
1391	set x1 0.0
1392	} elseif { $x1 > 1.0 } {
1393	set x1 1.0
1394	}
1395	if { $x2 < 0.0 } {
1396	set x2 0.0
1397	} elseif { $x2 > 1.0 } {
1398	set x2 1.0
1399	}
1400	if { $x3 < 0.0 } {
1401	set x3 0.0
1402	} elseif { $x3 > 1.0 } {
1403	set x3 1.0
1404	}
1405	if { $x4 < 0.0 } {
1406	set x4 0.0
1407	} elseif { $x4 > 1.0 } {
1408	set x4 1.0
1409	}
1410	# add spikes in the middle
1411	lappend wmap $x1 0.0
1412	lappend wmap $x2 $max
1413	lappend wmap $x3 $max
1414	lappend wmap $x4 0.0
1415	}
1416	if { $last == "" \|\| $last != 1.0 } {
1417	lappend wmap 1.0 0.0
1418	}
1419	SendCmd "transfunc define $tf { $cmap } { $wmap }"
1420	}
1421
1422	# ----------------------------------------------------------------------
1423	# CONFIGURATION OPTION: -plotbackground
1424	# ----------------------------------------------------------------------
1425	itcl::configbody Rappture::NanovisViewer::plotbackground {
1426	if { [isconnected] } {
1427	foreach {r g b} [Color2RGB $itk_option(-plotbackground)] break
1428	#fix this!
1429	#SendCmd "color background $r $g $b"
1430	}
1431	}
1432
1433	# ----------------------------------------------------------------------
1434	# CONFIGURATION OPTION: -plotforeground
1435	# ----------------------------------------------------------------------
1436	itcl::configbody Rappture::NanovisViewer::plotforeground {
1437	if { [isconnected] } {
1438	foreach {r g b} [Color2RGB $itk_option(-plotforeground)] break
1439	#fix this!
1440	#SendCmd "color background $r $g $b"
1441	}
1442	}
1443
1444	# ----------------------------------------------------------------------
1445	# CONFIGURATION OPTION: -plotoutline
1446	# ----------------------------------------------------------------------
1447	itcl::configbody Rappture::NanovisViewer::plotoutline {
1448	# Must check if we are connected because this routine is called from the
1449	# class body when the -plotoutline itk_option is defined. At that point
1450	# the NanovisViewer class constructor hasn't been called, so we can't
1451	# start sending commands to visualization server.
1452	if { [isconnected] } {
1453	if {"" == $itk_option(-plotoutline)} {
1454	SendCmd "volume outline state off"
1455	} else {
1456	SendCmd "volume outline state on"
1457	SendCmd "volume outline color [Color2RGB $itk_option(-plotoutline)]"
1458	}
1459	}
1460	}
1461
1462	#
1463	# The -levels option takes a single value that represents the number
1464	# of evenly distributed markers based on the current data range. Each
1465	# marker is a relative value from 0.0 to 1.0.
1466	#
1467	itcl::body Rappture::NanovisViewer::ParseLevelsOption { tf levels } {
1468	set c $itk_component(legend)
1469	regsub -all "," $levels " " levels
1470	if {[string is int $levels]} {
1471	for {set i 1} { $i <= $levels } {incr i} {
1472	set x [expr {double($i)/($levels+1)}]
1473	set m [Rappture::IsoMarker \#auto $c $this $tf]
1474	$m relval $x
1475	lappend _isomarkers($tf) $m
1476	}
1477	} else {
1478	foreach x $levels {
1479	set m [Rappture::IsoMarker \#auto $c $this $tf]
1480	$m relval $x
1481	lappend _isomarkers($tf) $m
1482	}
1483	}
1484	}
1485
1486	#
1487	# The -markers option takes a list of zero or more values (the values
1488	# may be separated either by spaces or commas) that have the following
1489	# format:
1490	#
1491	# N% Percent of current total data range. Converted to
1492	# to a relative value between 0.0 and 1.0.
1493	# N Absolute value of marker. If the marker is outside of
1494	# the current range, it will be displayed on the outer
1495	# edge of the legends, but it range it represents will
1496	# not be seen.
1497	#
1498	itcl::body Rappture::NanovisViewer::ParseMarkersOption { tf markers } {
1499	set c $itk_component(legend)
1500	regsub -all "," $markers " " markers
1501	foreach marker $markers {
1502	set n [scan $marker "%g%s" value suffix]
1503	if { $n == 2 && $suffix == "%" } {
1504	# ${n}% : Set relative value.
1505	set value [expr {$value * 0.01}]
1506	set m [Rappture::IsoMarker \#auto $c $this $tf]
1507	$m relval $value
1508	lappend _isomarkers($tf) $m
1509	} else {
1510	# ${n} : Set absolute value.
1511	set m [Rappture::IsoMarker \#auto $c $this $tf]
1512	$m absval $value
1513	lappend _isomarkers($tf) $m
1514	}
1515	}
1516	}
1517
1518	# ----------------------------------------------------------------------
1519	# USAGE: UndateTransferFuncs
1520	# ----------------------------------------------------------------------
1521	itcl::body Rappture::NanovisViewer::updatetransferfuncs {} {
1522	$_dispatcher event -idle !send_transfunc
1523	}
1524
1525	itcl::body Rappture::NanovisViewer::AddIsoMarker { x y } {
1526	if { $_first == "" } {
1527	error "active transfer function isn't set"
1528	}
1529	set vol [lindex [CurrentVolumes] 0]
1530	set tf $_vol2style($vol)
1531	set c $itk_component(legend)
1532	set m [Rappture::IsoMarker \#auto $c $this $tf]
1533	set w [winfo width $c]
1534	$m relval [expr {double($x-10)/($w-20)}]
1535	lappend _isomarkers($tf) $m
1536	updatetransferfuncs
1537	return 1
1538	}
1539
1540	itcl::body Rappture::NanovisViewer::rmdupmarker { marker x } {
1541	set tf [$marker transferfunc]
1542	set bool 0
1543	if { [info exists _isomarkers($tf)] } {
1544	set list {}
1545	set marker [namespace tail $marker]
1546	foreach m $_isomarkers($tf) {
1547	set sx [$m screenpos]
1548	if { $m != $marker } {
1549	if { $x >= ($sx-3) && $x <= ($sx+3) } {
1550	$marker relval [$m relval]
1551	itcl::delete object $m
1552	bell
1553	set bool 1
1554	continue
1555	}
1556	}
1557	lappend list $m
1558	}
1559	set _isomarkers($tf) $list
1560	updatetransferfuncs
1561	}
1562	return $bool
1563	}
1564
1565	itcl::body Rappture::NanovisViewer::overmarker { marker x } {
1566	set tf [$marker transferfunc]
1567	if { [info exists _isomarkers($tf)] } {
1568	set marker [namespace tail $marker]
1569	foreach m $_isomarkers($tf) {
1570	set sx [$m screenpos]
1571	if { $m != $marker } {
1572	set bool [expr { $x >= ($sx-3) && $x <= ($sx+3) }]
1573	$m activate $bool
1574	}
1575	}
1576	}
1577	return ""
1578	}
1579
1580	itcl::body Rappture::NanovisViewer::limits { tf } {
1581	set _limits(min) 0.0
1582	set _limits(max) 1.0
1583	if { ![info exists _style2vols($tf)] } {
1584	return [array get _limits]
1585	}
1586	set min ""; set max ""
1587	foreach vol $_style2vols($tf) {
1588	if { ![info exists _serverVols($vol)] } {
1589	continue
1590	}
1591	if { ![info exists _limits($vol-min)] } {
1592	continue
1593	}
1594	if { $min == "" \|\| $min > $_limits($vol-min) } {
1595	set min $_limits($vol-min)
1596	}
1597	if { $max == "" \|\| $max < $_limits($vol-max) } {
1598	set max $_limits($vol-max)
1599	}
1600	}
1601	if { $min != "" } {
1602	set _limits(min) $min
1603	}
1604	if { $max != "" } {
1605	set _limits(max) $max
1606	}
1607	return [array get _limits]
1608	}
1609
1610
1611	itcl::body Rappture::NanovisViewer::BuildViewTab {} {
1612	foreach { key value } {
1613	grid 0
1614	axes 1
1615	outline 1
1616	volume 1
1617	legend 1
1618	particles 1
1619	lic 1
1620	} {
1621	set _settings($this-$key) $value
1622	}
1623
1624	set fg [option get $itk_component(hull) font Font]
1625	#set bfg [option get $itk_component(hull) boldFont Font]
1626
1627	set inner [$itk_component(main) insert end \
1628	-title "View Settings" \
1629	-icon [Rappture::icon wrench]]
1630	$inner configure -borderwidth 4
1631
1632	set ::Rappture::NanovisViewer::_settings($this-isosurface) 0
1633	checkbutton $inner.isosurface \
1634	-text "Isosurface shading" \
1635	-variable [itcl::scope _settings($this-isosurface)] \
1636	-command [itcl::code $this FixSettings isosurface] \
1637	-font "Arial 9"
1638
1639	checkbutton $inner.axes \
1640	-text "Axes" \
1641	-variable [itcl::scope _settings($this-axes)] \
1642	-command [itcl::code $this FixSettings axes] \
1643	-font "Arial 9"
1644
1645	checkbutton $inner.grid \
1646	-text "Grid" \
1647	-variable [itcl::scope _settings($this-grid)] \
1648	-command [itcl::code $this FixSettings grid] \
1649	-font "Arial 9"
1650
1651	checkbutton $inner.outline \
1652	-text "Outline" \
1653	-variable [itcl::scope _settings($this-outline)] \
1654	-command [itcl::code $this FixSettings outline] \
1655	-font "Arial 9"
1656
1657	checkbutton $inner.legend \
1658	-text "Legend" \
1659	-variable [itcl::scope _settings($this-legend)] \
1660	-command [itcl::code $this FixSettings legend] \
1661	-font "Arial 9"
1662
1663	checkbutton $inner.volume \
1664	-text "Volume" \
1665	-variable [itcl::scope _settings($this-volume)] \
1666	-command [itcl::code $this FixSettings volume] \
1667	-font "Arial 9"
1668
1669	blt::table $inner \
1670	0,0 $inner.axes -columnspan 2 -anchor w \
1671	1,0 $inner.grid -columnspan 2 -anchor w \
1672	2,0 $inner.outline -columnspan 2 -anchor w \
1673	3,0 $inner.volume -columnspan 2 -anchor w \
1674	4,0 $inner.legend -columnspan 2 -anchor w
1675
1676	if 0 {
1677	bind $inner <Map> [itcl::code $this GetVolumeInfo $inner]
1678	}
1679	blt::table configure $inner r* -resize none
1680	blt::table configure $inner r5 -resize expand
1681	}
1682
1683	itcl::body Rappture::NanovisViewer::BuildVolumeTab {} {
1684	foreach { key value } {
1685	light 40
1686	transp 50
1687	opacity 100
1688	thickness 350
1689	} {
1690	set _settings($this-$key) $value
1691	}
1692
1693	set inner [$itk_component(main) insert end \
1694	-title "Volume Settings" \
1695	-icon [Rappture::icon volume-on]]
1696	$inner configure -borderwidth 4
1697
1698	set fg [option get $itk_component(hull) font Font]
1699	#set bfg [option get $itk_component(hull) boldFont Font]
1700
1701	checkbutton $inner.vol -text "Show volume" -font $fg \
1702	-variable [itcl::scope _settings($this-volume)] \
1703	-command [itcl::code $this FixSettings volume]
1704	label $inner.shading -text "Shading:" -font $fg
1705
1706	label $inner.dim -text "Dim" -font $fg
1707	::scale $inner.light -from 0 -to 100 -orient horizontal \
1708	-variable [itcl::scope _settings($this-light)] \
1709	-width 10 \
1710	-showvalue off -command [itcl::code $this FixSettings light]
1711	label $inner.bright -text "Bright" -font $fg
1712
1713	label $inner.fog -text "Fog" -font $fg
1714	::scale $inner.transp -from 0 -to 100 -orient horizontal \
1715	-variable [itcl::scope _settings($this-transp)] \
1716	-width 10 \
1717	-showvalue off -command [itcl::code $this FixSettings transp]
1718	label $inner.plastic -text "Plastic" -font $fg
1719
1720	label $inner.clear -text "Clear" -font $fg
1721	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1722	-variable [itcl::scope _settings($this-opacity)] \
1723	-width 10 \
1724	-showvalue off -command [itcl::code $this FixSettings opacity]
1725	label $inner.opaque -text "Opaque" -font $fg
1726
1727	label $inner.thin -text "Thin" -font $fg
1728	::scale $inner.thickness -from 0 -to 1000 -orient horizontal \
1729	-variable [itcl::scope _settings($this-thickness)] \
1730	-width 10 \
1731	-showvalue off -command [itcl::code $this FixSettings thickness]
1732	label $inner.thick -text "Thick" -font $fg
1733
1734	blt::table $inner \
1735	0,0 $inner.vol -columnspan 4 -anchor w -pady 2 \
1736	1,0 $inner.shading -columnspan 4 -anchor w -pady {10 2} \
1737	2,0 $inner.dim -anchor e -pady 2 \
1738	2,1 $inner.light -columnspan 2 -pady 2 -fill x \
1739	2,3 $inner.bright -anchor w -pady 2 \
1740	3,0 $inner.fog -anchor e -pady 2 \
1741	3,1 $inner.transp -columnspan 2 -pady 2 -fill x \
1742	3,3 $inner.plastic -anchor w -pady 2 \
1743	4,0 $inner.clear -anchor e -pady 2 \
1744	4,1 $inner.opacity -columnspan 2 -pady 2 -fill x\
1745	4,3 $inner.opaque -anchor w -pady 2 \
1746	5,0 $inner.thin -anchor e -pady 2 \
1747	5,1 $inner.thickness -columnspan 2 -pady 2 -fill x\
1748	5,3 $inner.thick -anchor w -pady 2
1749
1750	blt::table configure $inner c0 c1 c3 r* -resize none
1751	blt::table configure $inner r6 -resize expand
1752	}
1753
1754	itcl::body Rappture::NanovisViewer::BuildCutplanesTab {} {
1755	set inner [$itk_component(main) insert end \
1756	-title "Cutplane Settings" \
1757	-icon [Rappture::icon cutbutton]]
1758	$inner configure -borderwidth 4
1759
1760	# X-value slicer...
1761	itk_component add xCutButton {
1762	Rappture::PushButton $inner.xbutton \
1763	-onimage [Rappture::icon x-cutplane] \
1764	-offimage [Rappture::icon x-cutplane] \
1765	-command [itcl::code $this FixSettings xcutplane] \
1766	-variable [itcl::scope _settings($this-xcutplane)]
1767	}
1768	Rappture::Tooltip::for $itk_component(xCutButton) \
1769	"Toggle the X cut plane on/off"
1770
1771	itk_component add xCutScale {
1772	::scale $inner.xval -from 100 -to 0 \
1773	-width 10 -orient vertical -showvalue off \
1774	-borderwidth 1 -highlightthickness 0 \
1775	-command [itcl::code $this Slice move x] \
1776	-variable [itcl::scope _settings($this-xcutposition)]
1777	} {
1778	usual
1779	ignore -borderwidth -highlightthickness
1780	}
1781	# Set the default cutplane value before disabling the scale.
1782	$itk_component(xCutScale) set 50
1783	$itk_component(xCutScale) configure -state disabled
1784	Rappture::Tooltip::for $itk_component(xCutScale) \
1785	"@[itcl::code $this SlicerTip x]"
1786
1787	# Y-value slicer...
1788	itk_component add yCutButton {
1789	Rappture::PushButton $inner.ybutton \
1790	-onimage [Rappture::icon y-cutplane] \
1791	-offimage [Rappture::icon y-cutplane] \
1792	-command [itcl::code $this FixSettings ycutplane] \
1793	-variable [itcl::scope _settings($this-ycutplane)]
1794	}
1795	Rappture::Tooltip::for $itk_component(yCutButton) \
1796	"Toggle the Y cut plane on/off"
1797
1798	itk_component add yCutScale {
1799	::scale $inner.yval -from 100 -to 0 \
1800	-width 10 -orient vertical -showvalue off \
1801	-borderwidth 1 -highlightthickness 0 \
1802	-command [itcl::code $this Slice move y] \
1803	-variable [itcl::scope _settings($this-ycutposition)]
1804	} {
1805	usual
1806	ignore -borderwidth -highlightthickness
1807	}
1808	Rappture::Tooltip::for $itk_component(yCutScale) \
1809	"@[itcl::code $this SlicerTip y]"
1810	# Set the default cutplane value before disabling the scale.
1811	$itk_component(yCutScale) set 50
1812	$itk_component(yCutScale) configure -state disabled
1813
1814	# Z-value slicer...
1815	itk_component add zCutButton {
1816	Rappture::PushButton $inner.zbutton \
1817	-onimage [Rappture::icon z-cutplane] \
1818	-offimage [Rappture::icon z-cutplane] \
1819	-command [itcl::code $this FixSettings zcutplane] \
1820	-variable [itcl::scope _settings($this-zcutplane)]
1821	}
1822	Rappture::Tooltip::for $itk_component(zCutButton) \
1823	"Toggle the Z cut plane on/off"
1824
1825	itk_component add zCutScale {
1826	::scale $inner.zval -from 100 -to 0 \
1827	-width 10 -orient vertical -showvalue off \
1828	-borderwidth 1 -highlightthickness 0 \
1829	-command [itcl::code $this Slice move z] \
1830	-variable [itcl::scope _settings($this-zcutposition)]
1831	} {
1832	usual
1833	ignore -borderwidth -highlightthickness
1834	}
1835	$itk_component(zCutScale) set 50
1836	$itk_component(zCutScale) configure -state disabled
1837	#$itk_component(zCutScale) configure -state disabled
1838	Rappture::Tooltip::for $itk_component(zCutScale) \
1839	"@[itcl::code $this SlicerTip z]"
1840
1841	blt::table $inner \
1842	1,1 $itk_component(xCutButton) \
1843	1,2 $itk_component(yCutButton) \
1844	1,3 $itk_component(zCutButton) \
1845	0,1 $itk_component(xCutScale) \
1846	0,2 $itk_component(yCutScale) \
1847	0,3 $itk_component(zCutScale)
1848
1849	blt::table configure $inner r0 r1 c* -resize none
1850	blt::table configure $inner r2 c4 -resize expand
1851	blt::table configure $inner c0 -width 2
1852	blt::table configure $inner c1 c2 c3 -padx 2
1853	}
1854
1855	itcl::body Rappture::NanovisViewer::BuildCameraTab {} {
1856	set inner [$itk_component(main) insert end \
1857	-title "Camera Settings" \
1858	-icon [Rappture::icon camera]]
1859	$inner configure -borderwidth 4
1860
1861	set labels { phi theta psi pan-x pan-y zoom }
1862	set row 0
1863	foreach tag $labels {
1864	label $inner.${tag}label -text $tag -font "Arial 9"
1865	entry $inner.${tag} -font "Arial 9" -bg white \
1866	-textvariable [itcl::scope _settings($this-$tag)]
1867	bind $inner.${tag} <KeyPress-Return> \
1868	[itcl::code $this camera set ${tag}]
1869	blt::table $inner \
1870	$row,0 $inner.${tag}label -anchor e -pady 2 \
1871	$row,1 $inner.${tag} -anchor w -pady 2
1872	blt::table configure $inner r$row -resize none
1873	incr row
1874	}
1875	blt::table configure $inner c0 c1 -resize none
1876	blt::table configure $inner c2 -resize expand
1877	blt::table configure $inner r$row -resize expand
1878	}
1879
1880
1881	# ----------------------------------------------------------------------
1882	# USAGE: Slice move x\|y\|z <newval>
1883	#
1884	# Called automatically when the user drags the slider to move the
1885	# cut plane that slices 3D data. Gets the current value from the
1886	# slider and moves the cut plane to the appropriate point in the
1887	# data set.
1888	# ----------------------------------------------------------------------
1889	itcl::body Rappture::NanovisViewer::Slice {option args} {
1890	switch -- $option {
1891	move {
1892	if {[llength $args] != 2} {
1893	error "wrong # args: should be \"Slice move x\|y\|z newval\""
1894	}
1895	set axis [lindex $args 0]
1896	set newval [lindex $args 1]
1897
1898	set newpos [expr {0.01*$newval}]
1899	set vols [CurrentVolumes -cutplanes]
1900	set vol [lindex $vols 0]
1901	SendCmd "cutplane position $newpos $axis $vol"
1902	}
1903	default {
1904	error "bad option \"$option\": should be axis, move, or volume"
1905	}
1906	}
1907	}
1908
1909	# ----------------------------------------------------------------------
1910	# USAGE: SlicerTip <axis>
1911	#
1912	# Used internally to generate a tooltip for the x/y/z slicer controls.
1913	# Returns a message that includes the current slicer value.
1914	# ----------------------------------------------------------------------
1915	itcl::body Rappture::NanovisViewer::SlicerTip {axis} {
1916	set val [$itk_component(${axis}CutScale) get]
1917	# set val [expr {0.01*($val-50)
1918	# *($_limits(${axis}max)-$_limits(${axis}min))
1919	# + 0.5*($_limits(${axis}max)+$_limits(${axis}min))}]
1920	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
1921	}
1922
1923
1924	itcl::body Rappture::NanovisViewer::DoResize {} {
1925	SendCmd "screen $_width $_height"
1926	set _resizePending 0
1927	}
1928
1929	itcl::body Rappture::NanovisViewer::EventuallyResize { w h } {
1930	set _width $w
1931	set _height $h
1932	if { !$_resizePending } {
1933	$_dispatcher event -idle !resize
1934	set _resizePending 1
1935	}
1936	}
1937
1938	itcl::body Rappture::NanovisViewer::EventuallyResizeLegend {} {
1939	if { !$_resizeLegendPending } {
1940	$_dispatcher event -idle !legend
1941	set _resizeLegendPending 1
1942	}
1943	}
1944
1945
1946	# camera --
1947	#
1948	itcl::body Rappture::NanovisViewer::camera {option args} {
1949	switch -- $option {
1950	"show" {
1951	puts [array get _view]
1952	}
1953	"set" {
1954	set who [lindex $args 0]
1955	set x $_settings($this-$who)
1956	set code [catch { string is double $x } result]
1957	if { $code != 0 \|\| !$result } {
1958	set _settings($this-$who) $_view($who)
1959	return
1960	}
1961	switch -- $who {
1962	"pan-x" - "pan-y" {
1963	set _view($who) $_settings($this-$who)
1964	PanCamera
1965	}
1966	"phi" - "theta" - "psi" {
1967	set _view($who) $_settings($this-$who)
1968	set xyz [Euler2XYZ $_view(theta) $_view(phi) $_view(psi)]
1969	SendCmd "camera angle $xyz"
1970	}
1971	"zoom" {
1972	set _view($who) $_settings($this-$who)
1973	SendCmd "camera zoom $_view(zoom)"
1974	}
1975	}
1976	}
1977	}
1978	}
1979
1980	itcl::body Rappture::NanovisViewer::GetVolumeInfo { w } {
1981	set flowobj ""
1982	foreach key [array names _obj2flow] {
1983	set flowobj $_obj2flow($key)
1984	break
1985	}
1986	if { $flowobj == "" } {
1987	return
1988	}
1989	if { [winfo exists $w.frame] } {
1990	destroy $w.frame
1991	}
1992	set inner [frame $w.frame]
1993	blt::table $w \
1994	5,0 $inner -fill both -columnspan 2 -anchor nw
1995	array set hints [$dataobj hints]
1996
1997	label $inner.volumes -text "Volumes" -font "Arial 9 bold"
1998	blt::table $inner \
1999	1,0 $inner.volumes -anchor w \
2000	blt::table configure $inner c0 c1 -resize none
2001	blt::table configure $inner c2 -resize expand
2002
2003	set row 3
2004	set volumes [get]
2005	if { [llength $volumes] > 0 } {
2006	blt::table $inner $row,0 $inner.volumes -anchor w
2007	incr row
2008	}
2009	foreach vol $volumes {
2010	array unset info
2011	array set info $vol
2012	set name $info(name)
2013	if { ![info exists _settings($this-volume-$name)] } {
2014	set _settings($this-volume-$name) $info(hide)
2015	}
2016	checkbutton $inner.vol$row -text $info(label) \
2017	-variable [itcl::scope _settings($this-volume-$name)] \
2018	-onvalue 0 -offvalue 1 \
2019	-command [itcl::code $this volume $key $name] \
2020	-font "Arial 9"
2021	Rappture::Tooltip::for $inner.vol$row $info(description)
2022	blt::table $inner $row,0 $inner.vol$row -anchor w
2023	if { !$_settings($this-volume-$name) } {
2024	$inner.vol$row select
2025	}
2026	incr row
2027	}
2028	blt::table configure $inner r* -resize none
2029	blt::table configure $inner r$row -resize expand
2030	blt::table configure $inner c3 -resize expand
2031	event generate [winfo parent [winfo parent $w]] <Configure>
2032	}
2033
2034	itcl::body Rappture::NanovisViewer::volume { tag name } {
2035	set bool $_settings($this-volume-$name)
2036	SendCmd "volume statue $bool $name"
2037	}
2038

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