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source: branches/1.6/gui/scripts/nanovisviewer.tcl @ 6309

Last change on this file since 6309 was 6309, checked in by gah, 8 years ago
fixes -load causing simulation
File size: 76.9 KB

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1	# -- mode: tcl; indent-tabs-mode: nil --
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) 2004-2016 HUBzero Foundation, LLC
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	option add *NanovisViewer.width 4i widgetDefault
20	option add NanovisViewercursor crosshair widgetDefault
21	option add *NanovisViewer.height 4i widgetDefault
22	option add *NanovisViewer.foreground black widgetDefault
23	option add *NanovisViewer.controlBackground gray widgetDefault
24	option add *NanovisViewer.controlDarkBackground #999999 widgetDefault
25	option add *NanovisViewer.plotBackground black widgetDefault
26	option add *NanovisViewer.plotForeground white widgetDefault
27	option add *NanovisViewer.plotOutline gray widgetDefault
28	option add *NanovisViewer.font \
29	--helvetica-medium-r-normal--12-* widgetDefault
30
31	# must use this name -- plugs into Rappture::resources::load
32	proc NanovisViewer_init_resources {} {
33	Rappture::resources::register \
34	nanovis_server Rappture::NanovisViewer::SetServerList
35	}
36
37	itcl::class Rappture::NanovisViewer {
38	inherit Rappture::VisViewer
39
40	itk_option define -plotforeground plotForeground Foreground ""
41	itk_option define -plotbackground plotBackground Background ""
42	itk_option define -plotoutline plotOutline PlotOutline ""
43
44	constructor { args } {
45	Rappture::VisViewer::constructor
46	} {
47	# defined below
48	}
49	destructor {
50	# defined below
51	}
52	public proc SetServerList { namelist } {
53	Rappture::VisViewer::SetServerList "nanovis" $namelist
54	}
55	public method add {dataobj {settings ""}}
56	public method camera {option args}
57	public method delete {args}
58	public method disconnect {}
59	public method download {option args}
60	public method get {args}
61	public method isconnected {}
62	public method limits { tf }
63	public method overMarker { m x }
64	public method parameters {title args} {
65	# do nothing
66	}
67	public method removeDuplicateMarker { m x }
68	public method scale {args}
69	public method updateTransferFunctions {}
70
71	# The following methods are only used by this class.
72	private method AddIsoMarker { x y }
73	private method AdjustSetting {what {value ""}}
74	private method BuildCameraTab {}
75	private method BuildCutplanesTab {}
76	private method BuildDownloadPopup { widget command }
77	private method BuildViewTab {}
78	private method BuildVolumeTab {}
79	private method ComputeTransferFunction { tf }
80	private method Connect {}
81	private method CurrentDatasets {{what -all}}
82	private method Disconnect {}
83	private method DoResize {}
84	private method DrawLegend { tf }
85	private method EventuallyRedrawLegend { }
86	private method EventuallyResize { w h }
87	private method FixLegend {}
88	private method GetImage { args }
89	private method GetVtkData { args }
90	private method InitSettings { args }
91	private method NameTransferFunction { dataobj comp }
92	private method Pan {option x y}
93	private method PanCamera {}
94	private method ParseLevelsOption { tf levels }
95	private method ParseMarkersOption { tf markers }
96	private method QuaternionToView { q } {
97	foreach { _view(-qw) _view(-qx) _view(-qy) _view(-qz) } $q break
98	}
99	private method Rebuild {}
100	private method ReceiveData { args }
101	private method ReceiveImage { args }
102	private method ReceiveLegend { tf vmin vmax size }
103	private method ResetColormap { color }
104	private method Rotate {option x y}
105	private method SendTransferFunctions {}
106	private method SetOrientation { side }
107	private method Slice {option args}
108	private method SlicerTip {axis}
109	private method ViewToQuaternion {} {
110	return [list $_view(-qw) $_view(-qx) $_view(-qy) $_view(-qz)]
111	}
112	private method Zoom {option}
113
114	private variable _arcball ""
115	private variable _dlist ""; # list of data objects
116	private variable _obj2ovride; # maps dataobj => style override
117	private variable _serverDatasets; # contains all the dataobj-component
118	# to volumes in the server
119	private variable _recvdDatasets; # list of data objs to send to server
120	private variable _dataset2style; # maps dataobj-component to transfunc
121	private variable _style2datasets; # maps tf back to list of
122	# dataobj-components using the tf.
123
124	private variable _reset 1; # Connection to server has been reset.
125	private variable _click; # Info used for rotate operations.
126	private variable _limits; # Autoscale min/max for all axes
127	private variable _view; # View params for 3D view
128	private variable _isomarkers; # array of isosurface level values 0..1
129	# Array of transfer functions in server. If 0 the transfer has been
130	# defined but not loaded. If 1 the transfer function has been named
131	# and loaded.
132	private variable _activeTfs
133	private variable _settings
134	private variable _first ""; # This is the topmost volume.
135	private variable _width 0
136	private variable _height 0
137	private variable _resizePending 0
138	private variable _resizeLegendPending 0
139
140	private common _downloadPopup; # download options from popup
141	private common _hardcopy
142	}
143
144	itk::usual NanovisViewer {
145	keep -background -foreground -cursor -font
146	keep -plotbackground -plotforeground
147	}
148
149	# ----------------------------------------------------------------------
150	# CONSTRUCTOR
151	# ----------------------------------------------------------------------
152	itcl::body Rappture::NanovisViewer::constructor {args} {
153	set _serverType "nanovis"
154
155	#DebugOn
156	EnableWaitDialog 900
157
158	# Rebuild event
159	$_dispatcher register !rebuild
160	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
161
162	# Resize event
163	$_dispatcher register !resize
164	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
165
166	# Legend event
167	$_dispatcher register !legend
168	$_dispatcher dispatch $this !legend "[itcl::code $this FixLegend]; list"
169
170	# Send transfer functions event
171	$_dispatcher register !send_transfunc
172	$_dispatcher dispatch $this !send_transfunc \
173	"[itcl::code $this SendTransferFunctions]; list"
174
175	#
176	# Populate parser with commands handle incoming requests
177	#
178	$_parser alias image [itcl::code $this ReceiveImage]
179	$_parser alias legend [itcl::code $this ReceiveLegend]
180	$_parser alias data [itcl::code $this ReceiveData]
181
182	# Initialize the view to some default parameters.
183	array set _view {
184	-qw 0.853553
185	-qx -0.353553
186	-qy 0.353553
187	-qz 0.146447
188	-xpan 0
189	-ypan 0
190	-zoom 1.0
191	}
192	set _arcball [blt::arcball create 100 100]
193	$_arcball quaternion [ViewToQuaternion]
194
195	set _limits(vmin) 0.0
196	set _limits(vmax) 1.0
197
198	array set _settings [subst {
199	-axesvisible 1
200	-background black
201	-colormap "BCGYR"
202	-cutplanesvisible 0
203	-gridvisible 0
204	-isosurfaceshading 0
205	-legendvisible 1
206	-light 40
207	-light2side 1
208	-opacity 50
209	-outlinevisible 0
210	-qw $_view(-qw)
211	-qx $_view(-qx)
212	-qy $_view(-qy)
213	-qz $_view(-qz)
214	-thickness 350
215	-volume 1
216	-xcutplaneposition 50
217	-xcutplanevisible 0
218	-xpan $_view(-xpan)
219	-ycutplaneposition 50
220	-ycutplanevisible 0
221	-ypan $_view(-ypan)
222	-zcutplaneposition 50
223	-zcutplanevisible 0
224	-zoom $_view(-zoom)
225	}]
226
227	itk_component add view {
228	label $itk_component(plotarea).view -image $_image(plot) \
229	-highlightthickness 0 -borderwidth 0
230	} {
231	usual
232	ignore -highlightthickness -borderwidth -background
233	}
234	bind $itk_component(view) <Control-F1> [itcl::code $this ToggleConsole]
235
236	set f [$itk_component(main) component controls]
237	itk_component add reset {
238	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
239	-highlightthickness 0 \
240	-image [Rappture::icon reset-view] \
241	-command [itcl::code $this Zoom reset]
242	} {
243	usual
244	ignore -highlightthickness
245	}
246	pack $itk_component(reset) -side top -padx 2 -pady 2
247	Rappture::Tooltip::for $itk_component(reset) \
248	"Reset the view to the default zoom level"
249
250	itk_component add zoomin {
251	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
252	-highlightthickness 0 \
253	-image [Rappture::icon zoom-in] \
254	-command [itcl::code $this Zoom in]
255	} {
256	usual
257	ignore -highlightthickness
258	}
259	pack $itk_component(zoomin) -side top -padx 2 -pady 2
260	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
261
262	itk_component add zoomout {
263	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
264	-highlightthickness 0 \
265	-image [Rappture::icon zoom-out] \
266	-command [itcl::code $this Zoom out]
267	} {
268	usual
269	ignore -highlightthickness
270	}
271	pack $itk_component(zoomout) -side top -padx 2 -pady 2
272	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
273
274	itk_component add volume {
275	Rappture::PushButton $f.volume \
276	-onimage [Rappture::icon volume-on] \
277	-offimage [Rappture::icon volume-off] \
278	-variable [itcl::scope _settings(-volume)] \
279	-command [itcl::code $this AdjustSetting -volume]
280	}
281	$itk_component(volume) select
282	Rappture::Tooltip::for $itk_component(volume) \
283	"Toggle the volume cloud on/off"
284	pack $itk_component(volume) -padx 2 -pady 2
285
286	itk_component add cutplane {
287	Rappture::PushButton $f.cutplane \
288	-onimage [Rappture::icon cutbutton] \
289	-offimage [Rappture::icon cutbutton] \
290	-variable [itcl::scope _settings(-cutplanesvisible)] \
291	-command [itcl::code $this AdjustSetting -cutplanesvisible]
292	}
293	Rappture::Tooltip::for $itk_component(cutplane) \
294	"Show/Hide cutplanes"
295	#pack $itk_component(cutplane) -padx 2 -pady 2
296
297	if { [catch {
298	BuildViewTab
299	BuildVolumeTab
300	BuildCutplanesTab
301	BuildCameraTab
302	} errs] != 0 } {
303	global errorInfo
304	puts stderr "errs=$errs errorInfo=$errorInfo"
305	}
306
307	# Legend
308	set _image(legend) [image create photo]
309	itk_component add legend {
310	canvas $itk_component(plotarea).legend -height 50 -highlightthickness 0
311	} {
312	usual
313	ignore -highlightthickness
314	rename -background -plotbackground plotBackground Background
315	}
316	bind $itk_component(legend) <Configure> \
317	[itcl::code $this EventuallyRedrawLegend]
318
319	# Hack around the Tk panewindow. The problem is that the requested
320	# size of the 3d view isn't set until an image is retrieved from
321	# the server. So the panewindow uses the tiny size.
322	set w 10000
323	pack forget $itk_component(view)
324	blt::table $itk_component(plotarea) \
325	0,0 $itk_component(view) -fill both -reqwidth $w \
326	1,0 $itk_component(legend) -fill x
327	blt::table configure $itk_component(plotarea) r1 -resize none
328
329	# Bindings for rotation via mouse
330	bind $itk_component(view) <ButtonPress-1> \
331	[itcl::code $this Rotate click %x %y]
332	bind $itk_component(view) <B1-Motion> \
333	[itcl::code $this Rotate drag %x %y]
334	bind $itk_component(view) <ButtonRelease-1> \
335	[itcl::code $this Rotate release %x %y]
336	bind $itk_component(view) <Configure> \
337	[itcl::code $this EventuallyResize %w %h]
338
339	# Bindings for panning via mouse
340	bind $itk_component(view) <ButtonPress-2> \
341	[itcl::code $this Pan click %x %y]
342	bind $itk_component(view) <B2-Motion> \
343	[itcl::code $this Pan drag %x %y]
344	bind $itk_component(view) <ButtonRelease-2> \
345	[itcl::code $this Pan release %x %y]
346
347	# Bindings for panning via keyboard
348	bind $itk_component(view) <KeyPress-Left> \
349	[itcl::code $this Pan set -10 0]
350	bind $itk_component(view) <KeyPress-Right> \
351	[itcl::code $this Pan set 10 0]
352	bind $itk_component(view) <KeyPress-Up> \
353	[itcl::code $this Pan set 0 -10]
354	bind $itk_component(view) <KeyPress-Down> \
355	[itcl::code $this Pan set 0 10]
356	bind $itk_component(view) <Shift-KeyPress-Left> \
357	[itcl::code $this Pan set -2 0]
358	bind $itk_component(view) <Shift-KeyPress-Right> \
359	[itcl::code $this Pan set 2 0]
360	bind $itk_component(view) <Shift-KeyPress-Up> \
361	[itcl::code $this Pan set 0 -2]
362	bind $itk_component(view) <Shift-KeyPress-Down> \
363	[itcl::code $this Pan set 0 2]
364
365	# Bindings for zoom via keyboard
366	bind $itk_component(view) <KeyPress-Prior> \
367	[itcl::code $this Zoom out]
368	bind $itk_component(view) <KeyPress-Next> \
369	[itcl::code $this Zoom in]
370
371	bind $itk_component(view) <Enter> "focus $itk_component(view)"
372
373	if {[string equal "x11" [tk windowingsystem]]} {
374	# Bindings for zoom via mouse
375	bind $itk_component(view) <4> [itcl::code $this Zoom out]
376	bind $itk_component(view) <5> [itcl::code $this Zoom in]
377	}
378
379	set _image(download) [image create photo]
380
381	eval itk_initialize $args
382	Connect
383	}
384
385	# ----------------------------------------------------------------------
386	# DESTRUCTOR
387	# ----------------------------------------------------------------------
388	itcl::body Rappture::NanovisViewer::destructor {} {
389	$_dispatcher cancel !rebuild
390	$_dispatcher cancel !send_transfunc
391	$_dispatcher cancel !resize
392	image delete $_image(plot)
393	image delete $_image(legend)
394	image delete $_image(download)
395	catch { blt::arcball destroy $_arcball }
396	array unset _settings
397	}
398
399	# ----------------------------------------------------------------------
400	# USAGE: add <dataobj> ?<settings>?
401	#
402	# Clients use this to add a data object to the plot. The optional
403	# <settings> are used to configure the plot. Allowed settings are
404	# -color, -brightness, -width, -linestyle, and -raise.
405	# ----------------------------------------------------------------------
406	itcl::body Rappture::NanovisViewer::add {dataobj {settings ""}} {
407	if { ![$dataobj isvalid] } {
408	return; # Object doesn't contain valid data.
409	}
410	array set params {
411	-color auto
412	-width 1
413	-linestyle solid
414	-brightness 0
415	-raise 0
416	-description ""
417	-param ""
418	}
419	array set params $settings
420
421	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
422	# can't handle -autocolors yet
423	set params(-color) black
424	}
425	set pos [lsearch -exact $_dlist $dataobj]
426	if {$pos < 0} {
427	lappend _dlist $dataobj
428	set _obj2ovride($dataobj-color) $params(-color)
429	set _obj2ovride($dataobj-width) $params(-width)
430	set _obj2ovride($dataobj-raise) $params(-raise)
431	$_dispatcher event -idle !rebuild
432	}
433	}
434
435	# ----------------------------------------------------------------------
436	# USAGE: get ?-objects?
437	# USAGE: get ?-image view\|legend?
438	#
439	# Clients use this to query the list of objects being plotted, in
440	# order from bottom to top of this result. The optional "-image"
441	# flag can also request the internal images being shown.
442	# ----------------------------------------------------------------------
443	itcl::body Rappture::NanovisViewer::get {args} {
444	if {[llength $args] == 0} {
445	set args "-objects"
446	}
447
448	set op [lindex $args 0]
449	switch -- $op {
450	"-objects" {
451	# put the dataobj list in order according to -raise options
452	set dlist $_dlist
453	foreach dataobj $dlist {
454	if {[info exists _obj2ovride($dataobj-raise)] &&
455	$_obj2ovride($dataobj-raise)} {
456	set i [lsearch -exact $dlist $dataobj]
457	if {$i >= 0} {
458	set dlist [lreplace $dlist $i $i]
459	lappend dlist $dataobj
460	}
461	}
462	}
463	return $dlist
464	}
465	"-image" {
466	if {[llength $args] != 2} {
467	error "wrong # args: should be \"get -image view\|legend\""
468	}
469	switch -- [lindex $args end] {
470	view {
471	return $_image(plot)
472	}
473	legend {
474	return $_image(legend)
475	}
476	default {
477	error "bad image name \"[lindex $args end]\": should be view or legend"
478	}
479	}
480	}
481	default {
482	error "bad option \"$op\": should be -objects or -image"
483	}
484	}
485	}
486
487	# ----------------------------------------------------------------------
488	# USAGE: delete ?<dataobj1> <dataobj2> ...?
489	#
490	# Clients use this to delete a dataobj from the plot. If no dataobjs
491	# are specified, then all dataobjs are deleted. No data objects are
492	# deleted. They are only removed from the display list.
493	# ----------------------------------------------------------------------
494	itcl::body Rappture::NanovisViewer::delete {args} {
495	if {[llength $args] == 0} {
496	set args $_dlist
497	}
498	# Delete all specified dataobjs
499	set changed 0
500	foreach dataobj $args {
501	set pos [lsearch -exact $_dlist $dataobj]
502	if { $pos >= 0 } {
503	set _dlist [lreplace $_dlist $pos $pos]
504	# Don't remove the limits settings because we're not really
505	# deleting the volume, just hiding it.
506	#array unset _limits $dataobj*
507	array unset _obj2ovride $dataobj-*
508	set changed 1
509	}
510	}
511	# If anything changed, then rebuild the plot
512	if {$changed} {
513	$_dispatcher event -idle !rebuild
514	}
515	}
516
517	# ----------------------------------------------------------------------
518	# USAGE: scale ?<data1> <data2> ...?
519	#
520	# Sets the default limits for the overall plot according to the
521	# limits of the data for all of the given <data> objects. This
522	# accounts for all objects--even those not showing on the screen.
523	# Because of this, the limits are appropriate for all objects as
524	# the user scans through data in the ResultSet viewer.
525	# ----------------------------------------------------------------------
526	itcl::body Rappture::NanovisViewer::scale {args} {
527	foreach val {xmin xmax ymin ymax zmin zmax vmin vmax} {
528	set _limits($val) ""
529	}
530	foreach dataobj $args {
531	if { ![$dataobj isvalid] } {
532	continue; # Object doesn't contain valid data.
533	}
534	foreach axis {x y z v} {
535	foreach { min max } [$dataobj limits $axis] break
536	if {"" != $min && "" != $max} {
537	if {"" == $_limits(${axis}min)} {
538	set _limits(${axis}min) $min
539	set _limits(${axis}max) $max
540	} else {
541	if {$min < $_limits(${axis}min)} {
542	set _limits(${axis}min) $min
543	}
544	if {$max > $_limits(${axis}max)} {
545	set _limits(${axis}max) $max
546	}
547	}
548	}
549	}
550	}
551	}
552
553	# ----------------------------------------------------------------------
554	# USAGE: download coming
555	# USAGE: download controls <downloadCommand>
556	# USAGE: download now
557	#
558	# Clients use this method to create a downloadable representation
559	# of the plot. Returns a list of the form {ext string}, where
560	# "ext" is the file extension (indicating the type of data) and
561	# "string" is the data itself.
562	# ----------------------------------------------------------------------
563	itcl::body Rappture::NanovisViewer::download {option args} {
564	switch $option {
565	coming {
566	if {[catch {
567	blt::winop snap $itk_component(plotarea) $_image(download)
568	}]} {
569	$_image(download) configure -width 1 -height 1
570	$_image(download) put #000000
571	}
572	}
573	controls {
574	set popup .nanovisviewerdownload
575	if { ![winfo exists $popup] } {
576	set inner [BuildDownloadPopup $popup [lindex $args 0]]
577	} else {
578	set inner [$popup component inner]
579	}
580	# FIXME: we only support download of current active component
581	#set num [llength [get]]
582	#set num [expr {($num == 1) ? "1 result" : "$num results"}]
583	set num "current field component"
584	set word [Rappture::filexfer::label downloadWord]
585	$inner.summary configure -text "$word $num in the following format:"
586	update idletasks ;# Fix initial sizes
587	return $popup
588	}
589	now {
590	set popup .nanovisviewerdownload
591	if { [winfo exists $popup] } {
592	$popup deactivate
593	}
594	switch -- $_downloadPopup(format) {
595	"image" {
596	return [$this GetImage [lindex $args 0]]
597	}
598	"vtk" {
599	return [$this GetVtkData [lindex $args 0]]
600	}
601	default {
602	error "bad download format \"$_downloadPopup(format)\""
603	}
604	}
605	}
606	default {
607	error "bad option \"$option\": should be coming, controls, now"
608	}
609	}
610	}
611
612	# ----------------------------------------------------------------------
613	# USAGE: Connect ?<host:port>,<host:port>...?
614	#
615	# Clients use this method to establish a connection to a new
616	# server, or to reestablish a connection to the previous server.
617	# Any existing connection is automatically closed.
618	# ----------------------------------------------------------------------
619	itcl::body Rappture::NanovisViewer::Connect {} {
620	set _hosts [GetServerList "nanovis"]
621	if { "" == $_hosts } {
622	return 0
623	}
624	set _reset 1
625	set result [VisViewer::Connect $_hosts]
626	if { $result } {
627	if { $_reportClientInfo } {
628	# Tell the server the viewer, hub, user and session.
629	# Do this immediately on connect before buffering any commands
630	global env
631
632	set info {}
633	set user "???"
634	if { [info exists env(USER)] } {
635	set user $env(USER)
636	}
637	set session "???"
638	if { [info exists env(SESSION)] } {
639	set session $env(SESSION)
640	}
641	lappend info "version" "$Rappture::version"
642	lappend info "build" "$Rappture::build"
643	lappend info "svnurl" "$Rappture::svnurl"
644	lappend info "installdir" "$Rappture::installdir"
645	lappend info "hub" [exec hostname]
646	lappend info "client" "nanovisviewer"
647	lappend info "user" $user
648	lappend info "session" $session
649	SendCmd "clientinfo [list $info]"
650	}
651
652	set w [winfo width $itk_component(view)]
653	set h [winfo height $itk_component(view)]
654	EventuallyResize $w $h
655	}
656	return $result
657	}
658
659	#
660	# isconnected --
661	#
662	# Indicates if we are currently connected to the visualization server.
663	#
664	itcl::body Rappture::NanovisViewer::isconnected {} {
665	return [VisViewer::IsConnected]
666	}
667
668	#
669	# disconnect --
670	#
671	itcl::body Rappture::NanovisViewer::disconnect {} {
672	Disconnect
673	}
674
675	#
676	# Disconnect --
677	#
678	# Clients use this method to disconnect from the current rendering server.
679	#
680	itcl::body Rappture::NanovisViewer::Disconnect {} {
681	VisViewer::Disconnect
682
683	# disconnected -- no more data sitting on server
684	array unset _serverDatasets
685	}
686
687	# ----------------------------------------------------------------------
688	# USAGE: SendTransferFunctions
689	# ----------------------------------------------------------------------
690	itcl::body Rappture::NanovisViewer::SendTransferFunctions {} {
691	if { $_first == "" } {
692	puts stderr "first not set"
693	return
694	}
695	# Ensure that the global thickness setting (in the slider
696	# settings widget) is used for the active transfer-function. Update
697	# the value in the _settings variable.
698	# Scale values between 0.00001 and 0.01000
699	set thickness [expr {double($_settings(-thickness)) * 0.0001}]
700
701	foreach tag [CurrentDatasets] {
702	if { ![info exists _serverDatasets($tag)] \|\| !$_serverDatasets($tag) } {
703	# The volume hasn't reached the server yet. How did we get
704	# here?
705	puts stderr "Don't have $tag in _serverDatasets"
706	continue
707	}
708	if { ![info exists _dataset2style($tag)] } {
709	puts stderr "don't have style for volume $tag"
710	continue; # How does this happen?
711	}
712	set tf $_dataset2style($tag)
713	set _settings($tf-thickness) $thickness
714	ComputeTransferFunction $tf
715	# FIXME: Need to the send information as to what transfer functions
716	# to update so that we only update the transfer function
717	# as necessary. Right now, all transfer functions are
718	# updated. This makes moving the isomarker slider chunky.
719	if { ![info exists _activeTfs($tf)] \|\| !$_activeTfs($tf) } {
720	set _activeTfs($tf) 1
721	}
722	SendCmd "volume shading transfunc $tf $tag"
723	}
724	FixLegend
725	}
726
727	# ----------------------------------------------------------------------
728	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
729	#
730	# Invoked automatically whenever the "image" command comes in from
731	# the rendering server. Indicates that binary image data with the
732	# specified <size> will follow.
733	# ----------------------------------------------------------------------
734	itcl::body Rappture::NanovisViewer::ReceiveImage { args } {
735	array set info {
736	-token "???"
737	-bytes 0
738	-type image
739	}
740	array set info $args
741	set bytes [ReceiveBytes $info(-bytes)]
742	switch -- $info(-type) {
743	"image" {
744	#puts stderr "received image [image width $_image(plot)]x[image height $_image(plot)]"
745	$_image(plot) configure -data $bytes
746	}
747	"print" {
748	set tag $this-print-$info(-token)
749	set _hardcopy($tag) $bytes
750	}
751	default {
752	puts stderr "unknown image type $info(-type)"
753	}
754	}
755	}
756
757	#
758	# DrawLegend --
759	#
760	itcl::body Rappture::NanovisViewer::DrawLegend { tf } {
761	set c $itk_component(legend)
762	set w [winfo width $c]
763	set h [winfo height $c]
764	set lx 10
765	set ly [expr {$h - 1}]
766	if {"" == [$c find withtag colorbar]} {
767	$c create image 10 10 -anchor nw \
768	-image $_image(legend) -tags colorbar
769	$c create text $lx $ly -anchor sw \
770	-fill $itk_option(-plotforeground) -tags "limits text vmin"
771	$c create text [expr {$w-$lx}] $ly -anchor se \
772	-fill $itk_option(-plotforeground) -tags "limits text vmax"
773	$c create text [expr {$w/2}] $ly -anchor s \
774	-fill $itk_option(-plotforeground) -tags "title text"
775	$c lower colorbar
776	$c bind colorbar <ButtonRelease-1> [itcl::code $this AddIsoMarker %x %y]
777	}
778
779	# Display the markers used by the current transfer function.
780	array set limits [limits $tf]
781	$c itemconfigure vmin -text [format %g $limits(min)]
782	$c coords vmin $lx $ly
783
784	$c itemconfigure vmax -text [format %g $limits(max)]
785	$c coords vmax [expr {$w-$lx}] $ly
786
787	if { $_first == "" } {
788	return
789	}
790	set title [$_first hints label]
791	set units [$_first hints units]
792	if { $units != "" } {
793	set title "$title ($units)"
794	}
795	$c itemconfigure title -text $title
796	$c coords title [expr {$w/2}] $ly
797
798	if { [info exists _isomarkers($tf)] } {
799	# The "visible" isomarker method below implicitly calls "absval".
800	# It uses the screen position of the marker to compute the absolute
801	# value. So make sure the window size has been computed before
802	# calling "visible".
803	update idletasks
804	update
805	foreach m $_isomarkers($tf) {
806	$m visible yes
807	}
808	}
809
810	# The colormap may have changed. Resync the slicers with the colormap.
811	set datasets [CurrentDatasets -cutplanes]
812	SendCmd "volume data state $_settings(-volume) $datasets"
813
814	# Adjust the cutplane for only the first component in the topmost volume
815	# (i.e. the first volume designated in the field).
816	set tag [lindex $datasets 0]
817	foreach axis {x y z} {
818	# Turn off cutplanes for all volumes
819	SendCmd "cutplane state 0 $axis"
820	if { $_settings(-${axis}cutplanevisible) } {
821	# Turn on cutplane for this particular volume and set the position
822	SendCmd "cutplane state 1 $axis $tag"
823	set pos [expr {0.01*$_settings(-${axis}cutplaneposition)}]
824	SendCmd "cutplane position $pos $axis $tag"
825	}
826	}
827	}
828
829	#
830	# ReceiveLegend --
831	#
832	# The procedure is the response from the render server to each "legend"
833	# command. The server sends back a "legend" command invoked our
834	# the slave interpreter. The purpose is to collect data of the image
835	# representing the legend in the canvas. In addition, the
836	# active transfer function is displayed.
837	#
838	itcl::body Rappture::NanovisViewer::ReceiveLegend { tf vmin vmax size } {
839	if { ![isconnected] } {
840	return
841	}
842	set bytes [ReceiveBytes $size]
843	$_image(legend) configure -data $bytes
844	ReceiveEcho <<line "<read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
845
846	DrawLegend $tf
847	}
848
849	#
850	# ReceiveData --
851	#
852	# The procedure is the response from the render server to each "data
853	# follows" command. The server sends back a "data" command invoked our
854	# the slave interpreter. The purpose is to collect the min/max of the
855	# volume sent to the render server. Since the client (nanovisviewer)
856	# doesn't parse 3D data formats, we rely on the server (nanovis) to
857	# tell us what the limits are. Once we've received the limits to all
858	# the data we've sent (tracked by _recvdDatasets) we can then determine
859	# what the transfer functions are for these volumes.
860	#
861	#
862	# Note: There is a considerable tradeoff in having the server report
863	# back what the data limits are. It means that much of the code
864	# having to do with transfer-functions has to wait for the data
865	# to come back, since the isomarkers are calculated based upon
866	# the data limits. The client code is much messier because of
867	# this. The alternative is to parse any of the 3D formats on the
868	# client side.
869	#
870	itcl::body Rappture::NanovisViewer::ReceiveData { args } {
871	if { ![isconnected] } {
872	return
873	}
874
875	# Arguments from server are name value pairs. Stuff them in an array.
876	array set info $args
877
878	set tag $info(tag)
879	set parts [split $tag -]
880
881	#
882	# Volumes don't exist until we're told about them.
883	#
884	set dataobj [lindex $parts 0]
885	set _serverDatasets($tag) 1
886	if { $_settings(-volume) && $dataobj == $_first } {
887	SendCmd "volume state 1 $tag"
888	}
889	set _limits($tag-min) $info(min); # Minimum value of the volume.
890	set _limits($tag-max) $info(max); # Maximum value of the volume.
891	set _limits(vmin) $info(vmin); # Overall minimum value.
892	set _limits(vmax) $info(vmax); # Overall maximum value.
893
894	unset _recvdDatasets($tag)
895	if { [array size _recvdDatasets] == 0 } {
896	# The active transfer function is by default the first component of
897	# the first data object. This assumes that the data is always
898	# successfully transferred.
899	updateTransferFunctions
900	}
901	}
902
903	# ----------------------------------------------------------------------
904	# USAGE: Rebuild
905	#
906	# Called automatically whenever something changes that affects the
907	# data in the widget. Clears any existing data and rebuilds the
908	# widget to display new data.
909	# ----------------------------------------------------------------------
910	itcl::body Rappture::NanovisViewer::Rebuild {} {
911	set w [winfo width $itk_component(view)]
912	set h [winfo height $itk_component(view)]
913	if { $w < 2 \|\| $h < 2 } {
914	update
915	$_dispatcher event -idle !rebuild
916	return
917	}
918
919	# Turn on buffering of commands to the server. We don't want to
920	# be preempted by a server disconnect/reconnect (which automatically
921	# generates a new call to Rebuild).
922	StartBufferingCommands
923
924	# Hide all the isomarkers. Can't remove them. Have to remember the
925	# settings since the user may have created/deleted/moved markers.
926
927	# The "visible" isomarker method below implicitly calls "absval". It
928	# uses the screen position of the marker to compute the absolute value.
929	# So make sure the window size has been computed before calling
930	# "visible".
931	update idletasks
932	update
933	foreach tf [array names _isomarkers] {
934	foreach m $_isomarkers($tf) {
935	$m visible no
936	}
937	}
938
939	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
940	set _width $w
941	set _height $h
942	$_arcball resize $w $h
943	DoResize
944	}
945
946	foreach dataobj [get] {
947	foreach cname [$dataobj components] {
948	set tag $dataobj-$cname
949	if { ![info exists _serverDatasets($tag)] } {
950	# Send the data as one huge base64-encoded mess -- yuck!
951	if { [$dataobj type] == "dx" } {
952	set data [$dataobj blob $cname]
953	} else {
954	set data [$dataobj vtkdata $cname]
955	if 0 {
956	set f [open "/tmp/volume.vtk" "w"]
957	fconfigure $f -translation binary -encoding binary
958	puts -nonewline $f $data
959	close $f
960	}
961	}
962	set nbytes [string length $data]
963	if { $_reportClientInfo } {
964	set info {}
965	lappend info "tool_id" [$dataobj hints toolid]
966	lappend info "tool_name" [$dataobj hints toolname]
967	lappend info "tool_title" [$dataobj hints tooltitle]
968	lappend info "tool_command" [$dataobj hints toolcommand]
969	lappend info "tool_revision" [$dataobj hints toolrevision]
970	lappend info "dataset_label" [$dataobj hints label]
971	lappend info "dataset_size" $nbytes
972	lappend info "dataset_tag" $tag
973	SendCmd "clientinfo [list $info]"
974	}
975	SendCmd "volume data follows $nbytes $tag"
976	SendData $data
977	set _recvdDatasets($tag) 1
978	set _serverDatasets($tag) 0
979	}
980	NameTransferFunction $dataobj $cname
981	}
982	}
983	set _first [lindex [get] 0]
984	# Outline seems to need to be reset every update.
985	InitSettings -outlinevisible ;#-cutplanesvisible
986	if { $_reset } {
987	#
988	# Reset the camera and other view parameters
989	#
990	set _settings(-qw) $_view(-qw)
991	set _settings(-qx) $_view(-qx)
992	set _settings(-qy) $_view(-qy)
993	set _settings(-qz) $_view(-qz)
994	set _settings(-xpan) $_view(-xpan)
995	set _settings(-ypan) $_view(-ypan)
996	set _settings(-zoom) $_view(-zoom)
997
998	set q [ViewToQuaternion]
999	$_arcball quaternion $q
1000	SendCmd "camera orient $q"
1001	SendCmd "camera reset"
1002	PanCamera
1003	SendCmd "camera zoom $_view(-zoom)"
1004
1005	# Turn off cutplanes for all volumes
1006	foreach axis {x y z} {
1007	SendCmd "cutplane state 0 $axis"
1008	}
1009
1010	InitSettings -axesvisible -gridvisible \
1011	-light2side -isosurfaceshading -opacity \
1012	-light \
1013	-xcutplanevisible -ycutplanevisible -zcutplanevisible
1014
1015	if {"" != $_first} {
1016	set axis [$_first hints updir]
1017	if { "" != $axis } {
1018	SendCmd "up $axis"
1019	}
1020	set location [$_first hints camera]
1021	if { $location != "" } {
1022	array set _view $location
1023	}
1024	}
1025	set _reset 0
1026	}
1027
1028	# nothing to send -- activate the proper ivol
1029	SendCmd "volume state 0"
1030	if {"" != $_first} {
1031	set datasets [array names _serverDatasets $_first-*]
1032	if { $datasets != "" } {
1033	SendCmd "volume state 1 $datasets"
1034	}
1035	# If the first volume already exists on the server, then make sure
1036	# we display the proper transfer function in the legend.
1037	set cname [lindex [$_first components] 0]
1038	if { [info exists _serverDatasets($_first-$cname)] } {
1039	updateTransferFunctions
1040	}
1041	}
1042	# Actually write the commands to the server socket. If it fails, we don't
1043	# care. We're finished here.
1044	blt::busy hold $itk_component(hull)
1045	StopBufferingCommands
1046	blt::busy release $itk_component(hull)
1047	}
1048
1049	# ----------------------------------------------------------------------
1050	# USAGE: CurrentDatasets ?-cutplanes?
1051	#
1052	# Returns a list of volume server IDs for the current volume being
1053	# displayed. This is normally a single ID, but it might be a list
1054	# of IDs if the current data object has multiple components.
1055	# ----------------------------------------------------------------------
1056	itcl::body Rappture::NanovisViewer::CurrentDatasets {{what -all}} {
1057	set rlist ""
1058	if { $_first == "" } {
1059	return
1060	}
1061	foreach cname [$_first components] {
1062	set tag $_first-$cname
1063	if { [info exists _serverDatasets($tag)] && $_serverDatasets($tag) } {
1064	array set style {
1065	-cutplanes 1
1066	}
1067	array set style [lindex [$_first components -style $cname] 0]
1068	if { $what != "-cutplanes" \|\| $style(-cutplanes) } {
1069	lappend rlist $tag
1070	}
1071	}
1072	}
1073	return $rlist
1074	}
1075
1076	# ----------------------------------------------------------------------
1077	# USAGE: Zoom in
1078	# USAGE: Zoom out
1079	# USAGE: Zoom reset
1080	#
1081	# Called automatically when the user clicks on one of the zoom
1082	# controls for this widget. Changes the zoom for the current view.
1083	# ----------------------------------------------------------------------
1084	itcl::body Rappture::NanovisViewer::Zoom {option} {
1085	switch -- $option {
1086	"in" {
1087	set _view(-zoom) [expr {$_view(-zoom)*1.25}]
1088	set _settings(-zoom) $_view(-zoom)
1089	SendCmd "camera zoom $_view(-zoom)"
1090	}
1091	"out" {
1092	set _view(-zoom) [expr {$_view(-zoom)*0.8}]
1093	set _settings(-zoom) $_view(-zoom)
1094	SendCmd "camera zoom $_view(-zoom)"
1095	}
1096	"reset" {
1097	array set _view {
1098	-qw 0.853553
1099	-qx -0.353553
1100	-qy 0.353553
1101	-qz 0.146447
1102	-xpan 0
1103	-ypan 0
1104	-zoom 1.0
1105	}
1106	if { $_first != "" } {
1107	set location [$_first hints camera]
1108	if { $location != "" } {
1109	array set _view $location
1110	}
1111	}
1112	set q [ViewToQuaternion]
1113	$_arcball quaternion $q
1114	SendCmd "camera orient $q"
1115	SendCmd "camera reset"
1116	set _settings(-qw) $_view(-qw)
1117	set _settings(-qx) $_view(-qx)
1118	set _settings(-qy) $_view(-qy)
1119	set _settings(-qz) $_view(-qz)
1120	set _settings(-xpan) $_view(-xpan)
1121	set _settings(-ypan) $_view(-ypan)
1122	set _settings(-zoom) $_view(-zoom)
1123	}
1124	}
1125	}
1126
1127	itcl::body Rappture::NanovisViewer::PanCamera {} {
1128	set x $_view(-xpan)
1129	set y $_view(-ypan)
1130	SendCmd "camera pan $x $y"
1131	}
1132
1133	# ----------------------------------------------------------------------
1134	# USAGE: Rotate click <x> <y>
1135	# USAGE: Rotate drag <x> <y>
1136	# USAGE: Rotate release <x> <y>
1137	#
1138	# Called automatically when the user clicks/drags/releases in the
1139	# plot area. Moves the plot according to the user's actions.
1140	# ----------------------------------------------------------------------
1141	itcl::body Rappture::NanovisViewer::Rotate {option x y} {
1142	switch -- $option {
1143	click {
1144	$itk_component(view) configure -cursor fleur
1145	set _click(x) $x
1146	set _click(y) $y
1147	}
1148	drag {
1149	if {[array size _click] == 0} {
1150	Rotate click $x $y
1151	} else {
1152	set w [winfo width $itk_component(view)]
1153	set h [winfo height $itk_component(view)]
1154	if {$w <= 0 \|\| $h <= 0} {
1155	return
1156	}
1157
1158	if {[catch {
1159	# this fails sometimes for no apparent reason
1160	set dx [expr {double($x-$_click(x))/$w}]
1161	set dy [expr {double($y-$_click(y))/$h}]
1162	}]} {
1163	return
1164	}
1165
1166	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1167	QuaternionToView $q
1168	set _settings(-qw) $_view(-qw)
1169	set _settings(-qx) $_view(-qx)
1170	set _settings(-qy) $_view(-qy)
1171	set _settings(-qz) $_view(-qz)
1172	SendCmd "camera orient $q"
1173
1174	set _click(x) $x
1175	set _click(y) $y
1176	}
1177	}
1178	release {
1179	Rotate drag $x $y
1180	$itk_component(view) configure -cursor ""
1181	catch {unset _click}
1182	}
1183	default {
1184	error "bad option \"$option\": should be click, drag, release"
1185	}
1186	}
1187	}
1188
1189	# ----------------------------------------------------------------------
1190	# USAGE: $this Pan click x y
1191	# $this Pan drag x y
1192	# $this Pan release x y
1193	#
1194	# Called automatically when the user clicks on one of the zoom
1195	# controls for this widget. Changes the zoom for the current view.
1196	# ----------------------------------------------------------------------
1197	itcl::body Rappture::NanovisViewer::Pan {option x y} {
1198	# Experimental stuff
1199	set w [winfo width $itk_component(view)]
1200	set h [winfo height $itk_component(view)]
1201	if { $option == "set" } {
1202	set x [expr $x / double($w)]
1203	set y [expr $y / double($h)]
1204	set _view(-xpan) [expr $_view(-xpan) + $x]
1205	set _view(-ypan) [expr $_view(-ypan) + $y]
1206	PanCamera
1207	set _settings(-xpan) $_view(-xpan)
1208	set _settings(-ypan) $_view(-ypan)
1209	return
1210	}
1211	if { $option == "click" } {
1212	set _click(x) $x
1213	set _click(y) $y
1214	$itk_component(view) configure -cursor hand1
1215	}
1216	if { $option == "drag" \|\| $option == "release" } {
1217	set dx [expr ($_click(x) - $x)/double($w)]
1218	set dy [expr ($_click(y) - $y)/double($h)]
1219	set _click(x) $x
1220	set _click(y) $y
1221	set _view(-xpan) [expr $_view(-xpan) - $dx]
1222	set _view(-ypan) [expr $_view(-ypan) - $dy]
1223	PanCamera
1224	set _settings(-xpan) $_view(-xpan)
1225	set _settings(-ypan) $_view(-ypan)
1226	}
1227	if { $option == "release" } {
1228	$itk_component(view) configure -cursor ""
1229	}
1230	}
1231
1232	# ----------------------------------------------------------------------
1233	# USAGE: InitSettings <what> ?<value>?
1234	#
1235	# Used internally to update rendering settings whenever parameters
1236	# change in the popup settings panel. Sends the new settings off
1237	# to the back end.
1238	# ----------------------------------------------------------------------
1239	itcl::body Rappture::NanovisViewer::InitSettings { args } {
1240	foreach arg $args {
1241	AdjustSetting $arg
1242	}
1243	}
1244
1245	# ----------------------------------------------------------------------
1246	# USAGE: AdjustSetting <what> ?<value>?
1247	#
1248	# Used internally to update rendering settings whenever parameters
1249	# change in the popup settings panel. Sends the new settings off
1250	# to the back end.
1251	# ----------------------------------------------------------------------
1252	itcl::body Rappture::NanovisViewer::AdjustSetting {what {value ""}} {
1253	if {![isconnected]} {
1254	return
1255	}
1256	switch -- $what {
1257	"-axesvisible" {
1258	SendCmd "axis visible $_settings($what)"
1259	}
1260	"-background" {
1261	set bgcolor [$itk_component(background) value]
1262	array set fgcolors {
1263	"black" "white"
1264	"white" "black"
1265	"grey" "black"
1266	}
1267	configure -plotbackground $bgcolor \
1268	-plotforeground $fgcolors($bgcolor)
1269	#DrawLegend $_current
1270	}
1271	"-colormap" {
1272	set color [$itk_component(colormap) value]
1273	set _settings($what) $color
1274	# Only set the colormap on the first volume. Ignore the others.
1275	#ResetColormap $color
1276	}
1277	"-cutplanesvisible" {
1278	set bool $_settings($what)
1279	# We only set cutplanes on the first dataset.
1280	set datasets [CurrentDatasets -cutplanes]
1281	set tag [lindex $datasets 0]
1282	SendCmd "cutplane visible $bool $tag"
1283	}
1284	"-gridvisible" {
1285	SendCmd "grid visible $_settings($what)"
1286	}
1287	"-isosurfaceshading" {
1288	set val $_settings($what)
1289	SendCmd "volume shading isosurface $val"
1290	}
1291	"-legendvisible" {
1292	if { $_settings($what) } {
1293	blt::table $itk_component(plotarea) \
1294	0,0 $itk_component(view) -fill both \
1295	1,0 $itk_component(legend) -fill x
1296	blt::table configure $itk_component(plotarea) r1 -resize none
1297	} else {
1298	blt::table forget $itk_component(legend)
1299	}
1300	}
1301	"-light" {
1302	set val $_settings($what)
1303	set diffuse [expr {0.01*$val}]
1304	set ambient [expr {1.0-$diffuse}]
1305	set specularLevel 0.3
1306	set specularExp 90.0
1307	SendCmd "volume shading ambient $ambient"
1308	SendCmd "volume shading diffuse $diffuse"
1309	SendCmd "volume shading specularLevel $specularLevel"
1310	SendCmd "volume shading specularExp $specularExp"
1311	}
1312	"-light2side" {
1313	set val $_settings($what)
1314	SendCmd "volume shading light2side $val"
1315	}
1316	"-opacity" {
1317	set val $_settings($what)
1318	set sval [expr { 0.01 * double($val) }]
1319	SendCmd "volume shading opacity $sval"
1320	}
1321	"-outlinevisible" {
1322	SendCmd "volume outline state $_settings($what)"
1323	}
1324	"-thickness" {
1325	if { [array names _activeTfs] > 0 } {
1326	set val $_settings($what)
1327	# Scale values between 0.00001 and 0.01000
1328	set sval [expr {0.0001*double($val)}]
1329	foreach tf [array names _activeTfs] {
1330	set _settings($tf${what}) $sval
1331	set _activeTfs($tf) 0
1332	}
1333	updateTransferFunctions
1334	}
1335	}
1336	"-volume" {
1337	set datasets [CurrentDatasets -cutplanes]
1338	SendCmd "volume data state $_settings($what) $datasets"
1339	}
1340	"-xcutplaneposition" - "-ycutplaneposition" - "-zcutplaneposition" {
1341	set axis [string range $what 1 1]
1342	set pos [expr $_settings($what) * 0.01]
1343	# We only set cutplanes on the first dataset.
1344	set datasets [CurrentDatasets -cutplanes]
1345	set tag [lindex $datasets 0]
1346	SendCmd "cutplane position $pos $axis $tag"
1347	}
1348	"-xcutplanevisible" - "-ycutplanevisible" - "-zcutplanevisible" {
1349	set axis [string range $what 1 1]
1350	set bool $_settings($what)
1351	# We only set cutplanes on the first dataset.
1352	set datasets [CurrentDatasets -cutplanes]
1353	set tag [lindex $datasets 0]
1354	SendCmd "cutplane state $bool $axis $tag"
1355	if { $bool } {
1356	$itk_component(${axis}CutScale) configure -state normal \
1357	-troughcolor white
1358	} else {
1359	$itk_component(${axis}CutScale) configure -state disabled \
1360	-troughcolor grey82
1361	}
1362	}
1363	default {
1364	error "don't know how to fix $what"
1365	}
1366	}
1367	}
1368
1369	# ----------------------------------------------------------------------
1370	# USAGE: FixLegend
1371	#
1372	# Used internally to update the legend area whenever it changes size
1373	# or when the field changes. Asks the server to send a new legend
1374	# for the current field.
1375	# ----------------------------------------------------------------------
1376	itcl::body Rappture::NanovisViewer::FixLegend {} {
1377	set _resizeLegendPending 0
1378	set lineht [font metrics $itk_option(-font) -linespace]
1379	set w [expr {$_width-20}]
1380	set h [expr {[winfo height $itk_component(legend)]-20-$lineht}]
1381	if {$w > 0 && $h > 0 && [array names _activeTfs] > 0 && $_first != "" } {
1382	set tag [lindex [CurrentDatasets] 0]
1383	if { [info exists _dataset2style($tag)] } {
1384	SendCmd "legend $_dataset2style($tag) $w $h"
1385	}
1386	}
1387	}
1388
1389	#
1390	# NameTransferFunction --
1391	#
1392	# Creates a transfer function name based on the <style> settings in the
1393	# library run.xml file. This placeholder will be used later to create
1394	# and send the actual transfer function once the data info has been sent
1395	# to us by the render server. [We won't know the volume limits until the
1396	# server parses the 3D data and sends back the limits via ReceiveData.]
1397	#
1398	# FIXME: The current way we generate transfer-function names completely
1399	# ignores the -markers option. The problem is that we are forced
1400	# to compute the name from an increasing complex set of values:
1401	# color, levels, markers.
1402	#
1403	itcl::body Rappture::NanovisViewer::NameTransferFunction { dataobj cname } {
1404	array set style {
1405	-color BCGYR
1406	-levels 6
1407	}
1408	set tag $dataobj-$cname
1409	array set style [lindex [$dataobj components -style $cname] 0]
1410	set tf "$style(-color):$style(-levels)"
1411	set _dataset2style($tag) $tf
1412	lappend _style2datasets($tf) $tag
1413	return $tf
1414	}
1415
1416	#
1417	# ComputeTransferFunction --
1418	#
1419	# Computes and sends the transfer function to the render server. It's
1420	# assumed that the volume data limits are known and that the global
1421	# transfer-functions slider values have been set up. Both parts are
1422	# needed to compute the relative value (location) of the marker, and
1423	# the alpha map of the transfer function.
1424	#
1425	itcl::body Rappture::NanovisViewer::ComputeTransferFunction { tf } {
1426	array set style {
1427	-color BCGYR
1428	-levels 6
1429	}
1430
1431	foreach {dataobj cname} [split [lindex $_style2datasets($tf) 0] -] break
1432	array set style [lindex [$dataobj components -style $cname] 0]
1433
1434	# We have to parse the style attributes for a volume using this
1435	# transfer-function once. This sets up the initial isomarkers for the
1436	# transfer function. The user may add/delete markers, so we have to
1437	# maintain a list of markers for each transfer-function. We use the one
1438	# of the volumes (the first in the list) using the transfer-function as a
1439	# reference.
1440	#
1441	# FIXME: The current way we generate transfer-function names completely
1442	# ignores the -markers option. The problem is that we are forced
1443	# to compute the name from an increasing complex set of values:
1444	# color, levels, markers.
1445	if { ![info exists _isomarkers($tf)] } {
1446	# Have to defer creation of isomarkers until we have data limits
1447	if { [info exists style(-markers)] &&
1448	[llength $style(-markers)] > 0 } {
1449	ParseMarkersOption $tf $style(-markers)
1450	} else {
1451	ParseLevelsOption $tf $style(-levels)
1452	}
1453	}
1454	set cmap [ColorsToColormap $style(-color)]
1455
1456	# Transfer function should be normalized with [0,1] range
1457	# The volume shading opacity setting is used to scale opacity
1458	# in the volume shader.
1459	set max 1.0
1460
1461	set isovalues {}
1462	foreach m $_isomarkers($tf) {
1463	lappend isovalues [$m relval]
1464	}
1465	# Sort the isovalues
1466	set isovalues [lsort -real $isovalues]
1467
1468	if { ![info exists _settings($tf-thickness)]} {
1469	set _settings($tf-thickness) 0.005
1470	}
1471	set delta $_settings($tf-thickness)
1472
1473	set first [lindex $isovalues 0]
1474	set last [lindex $isovalues end]
1475	set amap ""
1476	if { $first == "" \|\| $first != 0.0 } {
1477	lappend amap 0.0 0.0
1478	}
1479	foreach x $isovalues {
1480	set x1 [expr {$x-$delta-0.00001}]
1481	set x2 [expr {$x-$delta}]
1482	set x3 [expr {$x+$delta}]
1483	set x4 [expr {$x+$delta+0.00001}]
1484	if { $x1 < 0.0 } {
1485	set x1 0.0
1486	} elseif { $x1 > 1.0 } {
1487	set x1 1.0
1488	}
1489	if { $x2 < 0.0 } {
1490	set x2 0.0
1491	} elseif { $x2 > 1.0 } {
1492	set x2 1.0
1493	}
1494	if { $x3 < 0.0 } {
1495	set x3 0.0
1496	} elseif { $x3 > 1.0 } {
1497	set x3 1.0
1498	}
1499	if { $x4 < 0.0 } {
1500	set x4 0.0
1501	} elseif { $x4 > 1.0 } {
1502	set x4 1.0
1503	}
1504	# add spikes in the middle
1505	lappend amap $x1 0.0
1506	lappend amap $x2 $max
1507	lappend amap $x3 $max
1508	lappend amap $x4 0.0
1509	}
1510	if { $last == "" \|\| $last != 1.0 } {
1511	lappend amap 1.0 0.0
1512	}
1513	SendCmd "transfunc define $tf { $cmap } { $amap }"
1514	}
1515
1516	# ----------------------------------------------------------------------
1517	# CONFIGURATION OPTION: -plotbackground
1518	# ----------------------------------------------------------------------
1519	itcl::configbody Rappture::NanovisViewer::plotbackground {
1520	if { [isconnected] } {
1521	set color $itk_option(-plotbackground)
1522	set rgb [Color2RGB $color]
1523	SendCmd "screen bgcolor $rgb"
1524	$itk_component(legend) configure -background $color
1525	}
1526	}
1527
1528	# ----------------------------------------------------------------------
1529	# CONFIGURATION OPTION: -plotforeground
1530	# ----------------------------------------------------------------------
1531	itcl::configbody Rappture::NanovisViewer::plotforeground {
1532	if { [isconnected] } {
1533	set color $itk_option(-plotforeground)
1534	set rgb [Color2RGB $color]
1535	SendCmd "volume outline color $rgb"
1536	SendCmd "grid axiscolor $rgb"
1537	SendCmd "grid linecolor $rgb"
1538	$itk_component(legend) itemconfigure text -fill $color
1539	}
1540	}
1541
1542	# ----------------------------------------------------------------------
1543	# CONFIGURATION OPTION: -plotoutline
1544	# ----------------------------------------------------------------------
1545	itcl::configbody Rappture::NanovisViewer::plotoutline {
1546	# Must check if we are connected because this routine is called from the
1547	# class body when the -plotoutline itk_option is defined. At that point
1548	# the NanovisViewer class constructor hasn't been called, so we can't
1549	# start sending commands to visualization server.
1550	if { [isconnected] } {
1551	if {"" == $itk_option(-plotoutline)} {
1552	SendCmd "volume outline state off"
1553	} else {
1554	SendCmd "volume outline state on"
1555	SendCmd "volume outline color [Color2RGB $itk_option(-plotoutline)]"
1556	}
1557	}
1558	}
1559
1560	#
1561	# The -levels option takes a single value that represents the number
1562	# of evenly distributed markers based on the current data range. Each
1563	# marker is a relative value from 0.0 to 1.0.
1564	#
1565	itcl::body Rappture::NanovisViewer::ParseLevelsOption { tf levels } {
1566	set c $itk_component(legend)
1567	regsub -all "," $levels " " levels
1568	if {[string is int $levels]} {
1569	for {set i 1} { $i <= $levels } {incr i} {
1570	set x [expr {double($i)/($levels+1)}]
1571	set m [Rappture::IsoMarker \#auto $c $this $tf]
1572	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1573	$m relval $x
1574	lappend _isomarkers($tf) $m
1575	}
1576	} else {
1577	foreach x $levels {
1578	set m [Rappture::IsoMarker \#auto $c $this $tf]
1579	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1580	$m relval $x
1581	lappend _isomarkers($tf) $m
1582	}
1583	}
1584	}
1585
1586	#
1587	# The -markers option takes a list of zero or more values (the values
1588	# may be separated either by spaces or commas) that have the following
1589	# format:
1590	#
1591	# N% Percent of current total data range. Converted to
1592	# to a relative value between 0.0 and 1.0.
1593	# N Absolute value of marker. If the marker is outside of
1594	# the current range, it will be displayed on the outer
1595	# edge of the legends, but it range it represents will
1596	# not be seen.
1597	#
1598	itcl::body Rappture::NanovisViewer::ParseMarkersOption { tf markers } {
1599	set c $itk_component(legend)
1600	regsub -all "," $markers " " markers
1601	foreach marker $markers {
1602	set n [scan $marker "%g%s" value suffix]
1603	if { $n == 2 && $suffix == "%" } {
1604	# ${n}% : Set relative value.
1605	set value [expr {$value * 0.01}]
1606	set m [Rappture::IsoMarker \#auto $c $this $tf]
1607	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1608	$m relval $value
1609	lappend _isomarkers($tf) $m
1610	} else {
1611	# ${n} : Set absolute value.
1612	set m [Rappture::IsoMarker \#auto $c $this $tf]
1613	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1614	$m absval $value
1615	lappend _isomarkers($tf) $m
1616	}
1617	}
1618	}
1619
1620	itcl::body Rappture::NanovisViewer::updateTransferFunctions {} {
1621	$_dispatcher event -idle !send_transfunc
1622	}
1623
1624	itcl::body Rappture::NanovisViewer::AddIsoMarker { x y } {
1625	if { $_first == "" } {
1626	error "active transfer function isn't set"
1627	}
1628	set tag [lindex [CurrentDatasets] 0]
1629	set tf $_dataset2style($tag)
1630	set c $itk_component(legend)
1631	set m [Rappture::IsoMarker \#auto $c $this $tf]
1632	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1633	set w [winfo width $c]
1634	$m relval [expr {double($x-10)/($w-20)}]
1635	lappend _isomarkers($tf) $m
1636	updateTransferFunctions
1637	return 1
1638	}
1639
1640	itcl::body Rappture::NanovisViewer::removeDuplicateMarker { marker x } {
1641	set tf [$marker transferfunc]
1642	set bool 0
1643	if { [info exists _isomarkers($tf)] } {
1644	set list {}
1645	set marker [namespace tail $marker]
1646	foreach m $_isomarkers($tf) {
1647	set sx [$m screenpos]
1648	if { $m != $marker } {
1649	if { $x >= ($sx-3) && $x <= ($sx+3) } {
1650	$marker relval [$m relval]
1651	itcl::delete object $m
1652	bell
1653	set bool 1
1654	continue
1655	}
1656	}
1657	lappend list $m
1658	}
1659	set _isomarkers($tf) $list
1660	updateTransferFunctions
1661	}
1662	return $bool
1663	}
1664
1665	itcl::body Rappture::NanovisViewer::overMarker { marker x } {
1666	set tf [$marker transferfunc]
1667	if { [info exists _isomarkers($tf)] } {
1668	set marker [namespace tail $marker]
1669	foreach m $_isomarkers($tf) {
1670	set sx [$m screenpos]
1671	if { $m != $marker } {
1672	set bool [expr { $x >= ($sx-3) && $x <= ($sx+3) }]
1673	$m activate $bool
1674	}
1675	}
1676	}
1677	return ""
1678	}
1679
1680	itcl::body Rappture::NanovisViewer::limits { tf } {
1681	set _limits(min) 0.0
1682	set _limits(max) 1.0
1683	if { ![info exists _style2datasets($tf)] } {
1684	return [array get _limits]
1685	}
1686	set min ""; set max ""
1687	foreach tag $_style2datasets($tf) {
1688	if { ![info exists _serverDatasets($tag)] } {
1689	continue
1690	}
1691	if { ![info exists _limits($tag-min)] } {
1692	continue
1693	}
1694	if { $min == "" \|\| $min > $_limits($tag-min) } {
1695	set min $_limits($tag-min)
1696	}
1697	if { $max == "" \|\| $max < $_limits($tag-max) } {
1698	set max $_limits($tag-max)
1699	}
1700	}
1701	if { $min != "" } {
1702	set _limits(min) $min
1703	}
1704	if { $max != "" } {
1705	set _limits(max) $max
1706	}
1707	return [array get _limits]
1708	}
1709
1710	itcl::body Rappture::NanovisViewer::BuildViewTab {} {
1711	set fg [option get $itk_component(hull) font Font]
1712	#set bfg [option get $itk_component(hull) boldFont Font]
1713
1714	set inner [$itk_component(main) insert end \
1715	-title "View Settings" \
1716	-icon [Rappture::icon wrench]]
1717	$inner configure -borderwidth 4
1718
1719	checkbutton $inner.axes \
1720	-text "Axes" \
1721	-variable [itcl::scope _settings(-axesvisible)] \
1722	-command [itcl::code $this AdjustSetting -axesvisible] \
1723	-font "Arial 9"
1724
1725	checkbutton $inner.grid \
1726	-text "Grid" \
1727	-variable [itcl::scope _settings(-gridvisible)] \
1728	-command [itcl::code $this AdjustSetting -gridvisible] \
1729	-font "Arial 9"
1730
1731	checkbutton $inner.outline \
1732	-text "Outline" \
1733	-variable [itcl::scope _settings(-outlinevisible)] \
1734	-command [itcl::code $this AdjustSetting -outlinevisible] \
1735	-font "Arial 9"
1736
1737	checkbutton $inner.legend \
1738	-text "Legend" \
1739	-variable [itcl::scope _settings(-legendvisible)] \
1740	-command [itcl::code $this AdjustSetting -legendvisible] \
1741	-font "Arial 9"
1742
1743	checkbutton $inner.volume \
1744	-text "Volume" \
1745	-variable [itcl::scope _settings(-volume)] \
1746	-command [itcl::code $this AdjustSetting -volume] \
1747	-font "Arial 9"
1748
1749	label $inner.background_l -text "Background" -font "Arial 9"
1750	itk_component add background {
1751	Rappture::Combobox $inner.background -width 10 -editable no
1752	}
1753	$inner.background choices insert end \
1754	"black" "black" \
1755	"white" "white" \
1756	"grey" "grey"
1757
1758	$itk_component(background) value $_settings(-background)
1759	bind $inner.background <<Value>> \
1760	[itcl::code $this AdjustSetting -background]
1761
1762	blt::table $inner \
1763	0,0 $inner.axes -cspan 2 -anchor w \
1764	1,0 $inner.grid -cspan 2 -anchor w \
1765	2,0 $inner.outline -cspan 2 -anchor w \
1766	3,0 $inner.volume -cspan 2 -anchor w \
1767	4,0 $inner.legend -cspan 2 -anchor w \
1768	5,0 $inner.background_l -anchor e -pady 2 \
1769	5,1 $inner.background -fill x
1770
1771	blt::table configure $inner r* -resize none
1772	blt::table configure $inner r6 -resize expand
1773	}
1774
1775	itcl::body Rappture::NanovisViewer::BuildVolumeTab {} {
1776	set inner [$itk_component(main) insert end \
1777	-title "Volume Settings" \
1778	-icon [Rappture::icon volume-on]]
1779	$inner configure -borderwidth 4
1780
1781	set fg [option get $itk_component(hull) font Font]
1782	#set bfg [option get $itk_component(hull) boldFont Font]
1783
1784	checkbutton $inner.vol -text "Show volume" -font $fg \
1785	-variable [itcl::scope _settings(-volume)] \
1786	-command [itcl::code $this AdjustSetting -volume]
1787	label $inner.shading -text "Shading:" -font $fg
1788
1789	checkbutton $inner.isosurface -text "Isosurface shading" -font $fg \
1790	-variable [itcl::scope _settings(-isosurfaceshading)] \
1791	-command [itcl::code $this AdjustSetting -isosurfaceshading]
1792
1793	checkbutton $inner.light2side -text "Two-sided lighting" -font $fg \
1794	-variable [itcl::scope _settings(-light2side)] \
1795	-command [itcl::code $this AdjustSetting -light2side]
1796
1797	label $inner.dim -text "Glow" -font $fg
1798	::scale $inner.light -from 0 -to 100 -orient horizontal \
1799	-variable [itcl::scope _settings(-light)] \
1800	-width 10 \
1801	-showvalue off -command [itcl::code $this AdjustSetting -light]
1802	label $inner.bright -text "Surface" -font $fg
1803
1804	# Opacity
1805	label $inner.clear -text "Clear" -font $fg
1806	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1807	-variable [itcl::scope _settings(-opacity)] \
1808	-width 10 \
1809	-showvalue off -command [itcl::code $this AdjustSetting -opacity]
1810	label $inner.opaque -text "Opaque" -font $fg
1811
1812	# Tooth thickness
1813	label $inner.thin -text "Thin" -font $fg
1814	::scale $inner.thickness -from 0 -to 1000 -orient horizontal \
1815	-variable [itcl::scope _settings(-thickness)] \
1816	-width 10 \
1817	-showvalue off -command [itcl::code $this AdjustSetting -thickness]
1818	label $inner.thick -text "Thick" -font $fg
1819
1820	# Colormap
1821	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1822	itk_component add colormap {
1823	Rappture::Combobox $inner.colormap -width 10 -editable no
1824	}
1825
1826	$inner.colormap choices insert end [GetColormapList -includeNone]
1827	$itk_component(colormap) value "BCGYR"
1828	bind $inner.colormap <<Value>> \
1829	[itcl::code $this AdjustSetting -colormap]
1830
1831	blt::table $inner \
1832	0,0 $inner.vol -cspan 4 -anchor w -pady 2 \
1833	1,0 $inner.shading -cspan 4 -anchor w -pady {10 2} \
1834	2,0 $inner.light2side -cspan 4 -anchor w -pady 2 \
1835	3,0 $inner.dim -anchor e -pady 2 \
1836	3,1 $inner.light -cspan 2 -pady 2 -fill x \
1837	3,3 $inner.bright -anchor w -pady 2 \
1838	4,0 $inner.clear -anchor e -pady 2 \
1839	4,1 $inner.opacity -cspan 2 -pady 2 -fill x \
1840	4,3 $inner.opaque -anchor w -pady 2 \
1841	5,0 $inner.thin -anchor e -pady 2 \
1842	5,1 $inner.thickness -cspan 2 -pady 2 -fill x\
1843	5,3 $inner.thick -anchor w -pady 2
1844
1845	blt::table configure $inner c0 c1 c3 r* -resize none
1846	blt::table configure $inner r6 -resize expand
1847	}
1848
1849	itcl::body Rappture::NanovisViewer::BuildCutplanesTab {} {
1850	set inner [$itk_component(main) insert end \
1851	-title "Cutplane Settings" \
1852	-icon [Rappture::icon cutbutton]]
1853	$inner configure -borderwidth 4
1854
1855	checkbutton $inner.visible \
1856	-text "Show Cutplanes" \
1857	-variable [itcl::scope _settings(-cutplanesvisible)] \
1858	-command [itcl::code $this AdjustSetting -cutplanesvisible] \
1859	-font "Arial 9"
1860
1861	# X-value slicer...
1862	itk_component add xCutButton {
1863	Rappture::PushButton $inner.xbutton \
1864	-onimage [Rappture::icon x-cutplane] \
1865	-offimage [Rappture::icon x-cutplane] \
1866	-command [itcl::code $this AdjustSetting -xcutplanevisible] \
1867	-variable [itcl::scope _settings(-xcutplanevisible)]
1868	}
1869	Rappture::Tooltip::for $itk_component(xCutButton) \
1870	"Toggle the X cut plane on/off"
1871	#$itk_component(xCutButton) select
1872
1873	itk_component add xCutScale {
1874	::scale $inner.xval -from 100 -to 0 \
1875	-width 10 -orient vertical -showvalue off \
1876	-borderwidth 1 -highlightthickness 0 \
1877	-command [itcl::code $this Slice move x] \
1878	-variable [itcl::scope _settings(-xcutplaneposition)]
1879	} {
1880	usual
1881	ignore -borderwidth -highlightthickness
1882	}
1883	# Set the default cutplane value before disabling the scale.
1884	$itk_component(xCutScale) set 50
1885	$itk_component(xCutScale) configure -state disabled
1886	Rappture::Tooltip::for $itk_component(xCutScale) \
1887	"@[itcl::code $this SlicerTip x]"
1888
1889	# Y-value slicer...
1890	itk_component add yCutButton {
1891	Rappture::PushButton $inner.ybutton \
1892	-onimage [Rappture::icon y-cutplane] \
1893	-offimage [Rappture::icon y-cutplane] \
1894	-command [itcl::code $this AdjustSetting -ycutplanevisible] \
1895	-variable [itcl::scope _settings(-ycutplanevisible)]
1896	}
1897	Rappture::Tooltip::for $itk_component(yCutButton) \
1898	"Toggle the Y cut plane on/off"
1899	#$itk_component(yCutButton) select
1900
1901	itk_component add yCutScale {
1902	::scale $inner.yval -from 100 -to 0 \
1903	-width 10 -orient vertical -showvalue off \
1904	-borderwidth 1 -highlightthickness 0 \
1905	-command [itcl::code $this Slice move y] \
1906	-variable [itcl::scope _settings(-ycutplaneposition)]
1907	} {
1908	usual
1909	ignore -borderwidth -highlightthickness
1910	}
1911	Rappture::Tooltip::for $itk_component(yCutScale) \
1912	"@[itcl::code $this SlicerTip y]"
1913	# Set the default cutplane value before disabling the scale.
1914	$itk_component(yCutScale) set 50
1915	$itk_component(yCutScale) configure -state disabled
1916
1917	# Z-value slicer...
1918	itk_component add zCutButton {
1919	Rappture::PushButton $inner.zbutton \
1920	-onimage [Rappture::icon z-cutplane] \
1921	-offimage [Rappture::icon z-cutplane] \
1922	-command [itcl::code $this AdjustSetting -zcutplanevisible] \
1923	-variable [itcl::scope _settings(-zcutplanevisible)]
1924	}
1925	Rappture::Tooltip::for $itk_component(zCutButton) \
1926	"Toggle the Z cut plane on/off"
1927	#$itk_component(zCutButton) select
1928
1929	itk_component add zCutScale {
1930	::scale $inner.zval -from 100 -to 0 \
1931	-width 10 -orient vertical -showvalue off \
1932	-borderwidth 1 -highlightthickness 0 \
1933	-command [itcl::code $this Slice move z] \
1934	-variable [itcl::scope _settings(-zcutplaneposition)]
1935	} {
1936	usual
1937	ignore -borderwidth -highlightthickness
1938	}
1939	$itk_component(zCutScale) set 50
1940	$itk_component(zCutScale) configure -state disabled
1941	Rappture::Tooltip::for $itk_component(zCutScale) \
1942	"@[itcl::code $this SlicerTip z]"
1943
1944	blt::table $inner \
1945	0,1 $itk_component(xCutScale) \
1946	0,2 $itk_component(yCutScale) \
1947	0,3 $itk_component(zCutScale) \
1948	1,1 $itk_component(xCutButton) \
1949	1,2 $itk_component(yCutButton) \
1950	1,3 $itk_component(zCutButton)
1951
1952	# 0,1 $inner.visible -anchor w -pady 2 -cspan 4 \
1953
1954	blt::table configure $inner r0 r1 r2 c* -resize none
1955	blt::table configure $inner r3 c4 -resize expand
1956	blt::table configure $inner c0 -width 2
1957	blt::table configure $inner c1 c2 c3 -padx 2
1958	}
1959
1960	itcl::body Rappture::NanovisViewer::BuildCameraTab {} {
1961	set inner [$itk_component(main) insert end \
1962	-title "Camera Settings" \
1963	-icon [Rappture::icon camera]]
1964	$inner configure -borderwidth 4
1965
1966	label $inner.view_l -text "view" -font "Arial 9"
1967	set f [frame $inner.view]
1968	foreach side { front back left right top bottom } {
1969	button $f.$side -image [Rappture::icon view$side] \
1970	-command [itcl::code $this SetOrientation $side]
1971	Rappture::Tooltip::for $f.$side "Change the view to $side"
1972	pack $f.$side -side left
1973	}
1974
1975	blt::table $inner \
1976	0,0 $inner.view_l -anchor e -pady 2 \
1977	0,1 $inner.view -anchor w -pady 2
1978	blt::table configure $inner r0 -resize none
1979
1980	set row 1
1981	set labels { qw qx qy qz xpan ypan zoom }
1982	foreach tag $labels {
1983	label $inner.${tag}label -text $tag -font "Arial 9"
1984	entry $inner.${tag} -font "Arial 9" -bg white \
1985	-textvariable [itcl::scope _settings(-$tag)]
1986	bind $inner.${tag} <Return> \
1987	[itcl::code $this camera set -${tag}]
1988	bind $inner.${tag} <KP_Enter> \
1989	[itcl::code $this camera set -${tag}]
1990	blt::table $inner \
1991	$row,0 $inner.${tag}label -anchor e -pady 2 \
1992	$row,1 $inner.${tag} -anchor w -pady 2
1993	blt::table configure $inner r$row -resize none
1994	incr row
1995	}
1996
1997	blt::table configure $inner c* -resize none
1998	blt::table configure $inner c2 -resize expand
1999	blt::table configure $inner r$row -resize expand
2000	}
2001
2002	# ----------------------------------------------------------------------
2003	# USAGE: Slice move x\|y\|z <newval>
2004	#
2005	# Called automatically when the user drags the slider to move the
2006	# cut plane that slices 3D data. Gets the current value from the
2007	# slider and moves the cut plane to the appropriate point in the
2008	# data set.
2009	# ----------------------------------------------------------------------
2010	itcl::body Rappture::NanovisViewer::Slice {option args} {
2011	switch -- $option {
2012	move {
2013	if {[llength $args] != 2} {
2014	error "wrong # args: should be \"Slice move x\|y\|z newval\""
2015	}
2016	set axis [lindex $args 0]
2017	set newval [lindex $args 1]
2018
2019	set newpos [expr {0.01*$newval}]
2020	set datasets [CurrentDatasets -cutplanes]
2021	set tag [lindex $datasets 0]
2022	SendCmd "cutplane position $newpos $axis $tag"
2023	}
2024	default {
2025	error "bad option \"$option\": should be axis, move, or volume"
2026	}
2027	}
2028	}
2029
2030	# ----------------------------------------------------------------------
2031	# USAGE: SlicerTip <axis>
2032	#
2033	# Used internally to generate a tooltip for the x/y/z slicer controls.
2034	# Returns a message that includes the current slicer value.
2035	# ----------------------------------------------------------------------
2036	itcl::body Rappture::NanovisViewer::SlicerTip {axis} {
2037	set val [$itk_component(${axis}CutScale) get]
2038	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
2039	}
2040
2041	itcl::body Rappture::NanovisViewer::DoResize {} {
2042	$_arcball resize $_width $_height
2043	SendCmd "screen size $_width $_height"
2044	set _resizePending 0
2045	}
2046
2047	itcl::body Rappture::NanovisViewer::EventuallyResize { w h } {
2048	set _width $w
2049	set _height $h
2050	$_arcball resize $w $h
2051	if { !$_resizePending } {
2052	$_dispatcher event -idle !resize
2053	set _resizePending 1
2054	}
2055	}
2056
2057	itcl::body Rappture::NanovisViewer::EventuallyRedrawLegend {} {
2058	if { !$_resizeLegendPending } {
2059	$_dispatcher event -idle !legend
2060	set _resizeLegendPending 1
2061	}
2062	}
2063
2064	# camera --
2065	#
2066	itcl::body Rappture::NanovisViewer::camera {option args} {
2067	switch -- $option {
2068	"show" {
2069	puts [array get _view]
2070	}
2071	"set" {
2072	set what [lindex $args 0]
2073	set x $_settings($what)
2074	set code [catch { string is double $x } result]
2075	if { $code != 0 \|\| !$result } {
2076	set _settings($what) $_view($what)
2077	return
2078	}
2079	switch -- $what {
2080	"-xpan" - "-ypan" {
2081	set _view($what) $_settings($what)
2082	PanCamera
2083	}
2084	"-qx" - "-qy" - "-qz" - "-qw" {
2085	set _view($what) $_settings($what)
2086	set q [ViewToQuaternion]
2087	$_arcball quaternion $q
2088	SendCmd "camera orient $q"
2089	}
2090	"-zoom" {
2091	set _view($what) $_settings($what)
2092	SendCmd "camera zoom $_view($what)"
2093	}
2094	}
2095	}
2096	}
2097	}
2098
2099	itcl::body Rappture::NanovisViewer::GetVtkData { args } {
2100	# FIXME: We can only put one component of one dataset in a single
2101	# VTK file. To download all components/results, we would need
2102	# to put them in an archive (e.g. zip or tar file)
2103	if { $_first != ""} {
2104	set cname [lindex [$_first components] 0]
2105	set bytes [$_first vtkdata $cname]
2106	return [list .vtk $bytes]
2107	}
2108	puts stderr "Failed to get vtkdata"
2109	return ""
2110	}
2111
2112	itcl::body Rappture::NanovisViewer::GetImage { args } {
2113	if { [image width $_image(download)] > 0 &&
2114	[image height $_image(download)] > 0 } {
2115	set bytes [$_image(download) data -format "jpeg -quality 100"]
2116	set bytes [Rappture::encoding::decode -as b64 $bytes]
2117	return [list .jpg $bytes]
2118	}
2119	return ""
2120	}
2121
2122	itcl::body Rappture::NanovisViewer::BuildDownloadPopup { popup command } {
2123	Rappture::Balloon $popup \
2124	-title "[Rappture::filexfer::label downloadWord] as..."
2125	set inner [$popup component inner]
2126	label $inner.summary -text "" -anchor w
2127
2128	radiobutton $inner.vtk_button -text "VTK data file" \
2129	-variable [itcl::scope _downloadPopup(format)] \
2130	-font "Arial 9" \
2131	-value vtk
2132	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
2133
2134	radiobutton $inner.image_button -text "Image File" \
2135	-variable [itcl::scope _downloadPopup(format)] \
2136	-font "Arial 9 " \
2137	-value image
2138	Rappture::Tooltip::for $inner.image_button \
2139	"Save as digital image."
2140
2141	button $inner.ok -text "Save" \
2142	-highlightthickness 0 -pady 2 -padx 3 \
2143	-command $command \
2144	-compound left \
2145	-image [Rappture::icon download]
2146
2147	button $inner.cancel -text "Cancel" \
2148	-highlightthickness 0 -pady 2 -padx 3 \
2149	-command [list $popup deactivate] \
2150	-compound left \
2151	-image [Rappture::icon cancel]
2152
2153	blt::table $inner \
2154	0,0 $inner.summary -cspan 2 \
2155	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2156	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2157	4,1 $inner.cancel -width .9i -fill y \
2158	4,0 $inner.ok -padx 2 -width .9i -fill y
2159	blt::table configure $inner r3 -height 4
2160	blt::table configure $inner r4 -pady 4
2161	raise $inner.image_button
2162	$inner.vtk_button invoke
2163	return $inner
2164	}
2165
2166	itcl::body Rappture::NanovisViewer::SetOrientation { side } {
2167	array set positions {
2168	front "1 0 0 0"
2169	back "0 0 1 0"
2170	left "0.707107 0 -0.707107 0"
2171	right "0.707107 0 0.707107 0"
2172	top "0.707107 -0.707107 0 0"
2173	bottom "0.707107 0.707107 0 0"
2174	}
2175	foreach name { -qw -qx -qy -qz } value $positions($side) {
2176	set _view($name) $value
2177	}
2178	set q [ViewToQuaternion]
2179	$_arcball quaternion $q
2180	SendCmd "camera orient $q"
2181	SendCmd "camera reset"
2182	set _view(-xpan) 0
2183	set _view(-ypan) 0
2184	set _view(-zoom) 1.0
2185	set _settings(-xpan) $_view(-xpan)
2186	set _settings(-ypan) $_view(-ypan)
2187	set _settings(-zoom) $_view(-zoom)
2188	}

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