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source: branches/1.6/gui/scripts/nanovisviewer.tcl @ 6294

Last change on this file since 6294 was 6294, checked in by gah, 8 years ago
fixes for nanovisviewer
File size: 76.4 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	update idletasks
800	update
801	foreach m $_isomarkers($tf) {
802	$m visible yes
803	}
804	}
805
806	# The colormap may have changed. Resync the slicers with the colormap.
807	set datasets [CurrentDatasets -cutplanes]
808	SendCmd "volume data state $_settings(-volume) $datasets"
809
810	# Adjust the cutplane for only the first component in the topmost volume
811	# (i.e. the first volume designated in the field).
812	set tag [lindex $datasets 0]
813	foreach axis {x y z} {
814	# Turn off cutplanes for all volumes
815	SendCmd "cutplane state 0 $axis"
816	if { $_settings(-${axis}cutplanevisible) } {
817	# Turn on cutplane for this particular volume and set the position
818	SendCmd "cutplane state 1 $axis $tag"
819	set pos [expr {0.01*$_settings(-${axis}cutplaneposition)}]
820	SendCmd "cutplane position $pos $axis $tag"
821	}
822	}
823	}
824
825	#
826	# ReceiveLegend --
827	#
828	# The procedure is the response from the render server to each "legend"
829	# command. The server sends back a "legend" command invoked our
830	# the slave interpreter. The purpose is to collect data of the image
831	# representing the legend in the canvas. In addition, the
832	# active transfer function is displayed.
833	#
834	itcl::body Rappture::NanovisViewer::ReceiveLegend { tf vmin vmax size } {
835	if { ![isconnected] } {
836	return
837	}
838	set bytes [ReceiveBytes $size]
839	$_image(legend) configure -data $bytes
840	ReceiveEcho <<line "<read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
841
842	DrawLegend $tf
843	}
844
845	#
846	# ReceiveData --
847	#
848	# The procedure is the response from the render server to each "data
849	# follows" command. The server sends back a "data" command invoked our
850	# the slave interpreter. The purpose is to collect the min/max of the
851	# volume sent to the render server. Since the client (nanovisviewer)
852	# doesn't parse 3D data formats, we rely on the server (nanovis) to
853	# tell us what the limits are. Once we've received the limits to all
854	# the data we've sent (tracked by _recvdDatasets) we can then determine
855	# what the transfer functions are for these volumes.
856	#
857	#
858	# Note: There is a considerable tradeoff in having the server report
859	# back what the data limits are. It means that much of the code
860	# having to do with transfer-functions has to wait for the data
861	# to come back, since the isomarkers are calculated based upon
862	# the data limits. The client code is much messier because of
863	# this. The alternative is to parse any of the 3D formats on the
864	# client side.
865	#
866	itcl::body Rappture::NanovisViewer::ReceiveData { args } {
867	if { ![isconnected] } {
868	return
869	}
870
871	# Arguments from server are name value pairs. Stuff them in an array.
872	array set info $args
873
874	set tag $info(tag)
875	set parts [split $tag -]
876
877	#
878	# Volumes don't exist until we're told about them.
879	#
880	set dataobj [lindex $parts 0]
881	set _serverDatasets($tag) 1
882	if { $_settings(-volume) && $dataobj == $_first } {
883	SendCmd "volume state 1 $tag"
884	}
885	set _limits($tag-min) $info(min); # Minimum value of the volume.
886	set _limits($tag-max) $info(max); # Maximum value of the volume.
887	set _limits(vmin) $info(vmin); # Overall minimum value.
888	set _limits(vmax) $info(vmax); # Overall maximum value.
889
890	unset _recvdDatasets($tag)
891	if { [array size _recvdDatasets] == 0 } {
892	# The active transfer function is by default the first component of
893	# the first data object. This assumes that the data is always
894	# successfully transferred.
895	updateTransferFunctions
896	}
897	}
898
899	# ----------------------------------------------------------------------
900	# USAGE: Rebuild
901	#
902	# Called automatically whenever something changes that affects the
903	# data in the widget. Clears any existing data and rebuilds the
904	# widget to display new data.
905	# ----------------------------------------------------------------------
906	itcl::body Rappture::NanovisViewer::Rebuild {} {
907	set w [winfo width $itk_component(view)]
908	set h [winfo height $itk_component(view)]
909	if { $w < 2 \|\| $h < 2 } {
910	update
911	$_dispatcher event -idle !rebuild
912	return
913	}
914
915	# Turn on buffering of commands to the server. We don't want to
916	# be preempted by a server disconnect/reconnect (which automatically
917	# generates a new call to Rebuild).
918	StartBufferingCommands
919
920	# Hide all the isomarkers. Can't remove them. Have to remember the
921	# settings since the user may have created/deleted/moved markers.
922
923	update idletasks
924	update
925	foreach tf [array names _isomarkers] {
926	foreach m $_isomarkers($tf) {
927	$m visible no
928	}
929	}
930
931	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
932	set _width $w
933	set _height $h
934	$_arcball resize $w $h
935	DoResize
936	}
937
938	foreach dataobj [get] {
939	foreach cname [$dataobj components] {
940	set tag $dataobj-$cname
941	if { ![info exists _serverDatasets($tag)] } {
942	# Send the data as one huge base64-encoded mess -- yuck!
943	if { [$dataobj type] == "dx" } {
944	set data [$dataobj blob $cname]
945	} else {
946	set data [$dataobj vtkdata $cname]
947	if 0 {
948	set f [open "/tmp/volume.vtk" "w"]
949	fconfigure $f -translation binary -encoding binary
950	puts -nonewline $f $data
951	close $f
952	}
953	}
954	set nbytes [string length $data]
955	if { $_reportClientInfo } {
956	set info {}
957	lappend info "tool_id" [$dataobj hints toolid]
958	lappend info "tool_name" [$dataobj hints toolname]
959	lappend info "tool_title" [$dataobj hints tooltitle]
960	lappend info "tool_command" [$dataobj hints toolcommand]
961	lappend info "tool_revision" [$dataobj hints toolrevision]
962	lappend info "dataset_label" [$dataobj hints label]
963	lappend info "dataset_size" $nbytes
964	lappend info "dataset_tag" $tag
965	SendCmd "clientinfo [list $info]"
966	}
967	SendCmd "volume data follows $nbytes $tag"
968	SendData $data
969	set _recvdDatasets($tag) 1
970	set _serverDatasets($tag) 0
971	}
972	NameTransferFunction $dataobj $cname
973	}
974	}
975	set _first [lindex [get] 0]
976	# Outline seems to need to be reset every update.
977	InitSettings -outlinevisible ;#-cutplanesvisible
978	if { $_reset } {
979	#
980	# Reset the camera and other view parameters
981	#
982	set _settings(-qw) $_view(-qw)
983	set _settings(-qx) $_view(-qx)
984	set _settings(-qy) $_view(-qy)
985	set _settings(-qz) $_view(-qz)
986	set _settings(-xpan) $_view(-xpan)
987	set _settings(-ypan) $_view(-ypan)
988	set _settings(-zoom) $_view(-zoom)
989
990	set q [ViewToQuaternion]
991	$_arcball quaternion $q
992	SendCmd "camera orient $q"
993	SendCmd "camera reset"
994	PanCamera
995	SendCmd "camera zoom $_view(-zoom)"
996
997	# Turn off cutplanes for all volumes
998	foreach axis {x y z} {
999	SendCmd "cutplane state 0 $axis"
1000	}
1001
1002	InitSettings -axesvisible -gridvisible \
1003	-light2side -isosurfaceshading -opacity \
1004	-light \
1005	-xcutplanevisible -ycutplanevisible -zcutplanevisible
1006
1007	if {"" != $_first} {
1008	set axis [$_first hints updir]
1009	if { "" != $axis } {
1010	SendCmd "up $axis"
1011	}
1012	set location [$_first hints camera]
1013	if { $location != "" } {
1014	array set _view $location
1015	}
1016	}
1017	set _reset 0
1018	}
1019
1020	# nothing to send -- activate the proper ivol
1021	SendCmd "volume state 0"
1022	if {"" != $_first} {
1023	set datasets [array names _serverDatasets $_first-*]
1024	if { $datasets != "" } {
1025	SendCmd "volume state 1 $datasets"
1026	}
1027	# If the first volume already exists on the server, then make sure
1028	# we display the proper transfer function in the legend.
1029	set cname [lindex [$_first components] 0]
1030	if { [info exists _serverDatasets($_first-$cname)] } {
1031	updateTransferFunctions
1032	}
1033	}
1034	# Actually write the commands to the server socket. If it fails, we don't
1035	# care. We're finished here.
1036	blt::busy hold $itk_component(hull)
1037	StopBufferingCommands
1038	blt::busy release $itk_component(hull)
1039	}
1040
1041	# ----------------------------------------------------------------------
1042	# USAGE: CurrentDatasets ?-cutplanes?
1043	#
1044	# Returns a list of volume server IDs for the current volume being
1045	# displayed. This is normally a single ID, but it might be a list
1046	# of IDs if the current data object has multiple components.
1047	# ----------------------------------------------------------------------
1048	itcl::body Rappture::NanovisViewer::CurrentDatasets {{what -all}} {
1049	set rlist ""
1050	if { $_first == "" } {
1051	return
1052	}
1053	foreach cname [$_first components] {
1054	set tag $_first-$cname
1055	if { [info exists _serverDatasets($tag)] && $_serverDatasets($tag) } {
1056	array set style {
1057	-cutplanes 1
1058	}
1059	array set style [lindex [$_first components -style $cname] 0]
1060	if { $what != "-cutplanes" \|\| $style(-cutplanes) } {
1061	lappend rlist $tag
1062	}
1063	}
1064	}
1065	return $rlist
1066	}
1067
1068	# ----------------------------------------------------------------------
1069	# USAGE: Zoom in
1070	# USAGE: Zoom out
1071	# USAGE: Zoom reset
1072	#
1073	# Called automatically when the user clicks on one of the zoom
1074	# controls for this widget. Changes the zoom for the current view.
1075	# ----------------------------------------------------------------------
1076	itcl::body Rappture::NanovisViewer::Zoom {option} {
1077	switch -- $option {
1078	"in" {
1079	set _view(-zoom) [expr {$_view(-zoom)*1.25}]
1080	set _settings(-zoom) $_view(-zoom)
1081	SendCmd "camera zoom $_view(-zoom)"
1082	}
1083	"out" {
1084	set _view(-zoom) [expr {$_view(-zoom)*0.8}]
1085	set _settings(-zoom) $_view(-zoom)
1086	SendCmd "camera zoom $_view(-zoom)"
1087	}
1088	"reset" {
1089	array set _view {
1090	-qw 0.853553
1091	-qx -0.353553
1092	-qy 0.353553
1093	-qz 0.146447
1094	-xpan 0
1095	-ypan 0
1096	-zoom 1.0
1097	}
1098	if { $_first != "" } {
1099	set location [$_first hints camera]
1100	if { $location != "" } {
1101	array set _view $location
1102	}
1103	}
1104	set q [ViewToQuaternion]
1105	$_arcball quaternion $q
1106	SendCmd "camera orient $q"
1107	SendCmd "camera reset"
1108	set _settings(-qw) $_view(-qw)
1109	set _settings(-qx) $_view(-qx)
1110	set _settings(-qy) $_view(-qy)
1111	set _settings(-qz) $_view(-qz)
1112	set _settings(-xpan) $_view(-xpan)
1113	set _settings(-ypan) $_view(-ypan)
1114	set _settings(-zoom) $_view(-zoom)
1115	}
1116	}
1117	}
1118
1119	itcl::body Rappture::NanovisViewer::PanCamera {} {
1120	set x $_view(-xpan)
1121	set y $_view(-ypan)
1122	SendCmd "camera pan $x $y"
1123	}
1124
1125	# ----------------------------------------------------------------------
1126	# USAGE: Rotate click <x> <y>
1127	# USAGE: Rotate drag <x> <y>
1128	# USAGE: Rotate release <x> <y>
1129	#
1130	# Called automatically when the user clicks/drags/releases in the
1131	# plot area. Moves the plot according to the user's actions.
1132	# ----------------------------------------------------------------------
1133	itcl::body Rappture::NanovisViewer::Rotate {option x y} {
1134	switch -- $option {
1135	click {
1136	$itk_component(view) configure -cursor fleur
1137	set _click(x) $x
1138	set _click(y) $y
1139	}
1140	drag {
1141	if {[array size _click] == 0} {
1142	Rotate click $x $y
1143	} else {
1144	set w [winfo width $itk_component(view)]
1145	set h [winfo height $itk_component(view)]
1146	if {$w <= 0 \|\| $h <= 0} {
1147	return
1148	}
1149
1150	if {[catch {
1151	# this fails sometimes for no apparent reason
1152	set dx [expr {double($x-$_click(x))/$w}]
1153	set dy [expr {double($y-$_click(y))/$h}]
1154	}]} {
1155	return
1156	}
1157
1158	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1159	QuaternionToView $q
1160	set _settings(-qw) $_view(-qw)
1161	set _settings(-qx) $_view(-qx)
1162	set _settings(-qy) $_view(-qy)
1163	set _settings(-qz) $_view(-qz)
1164	SendCmd "camera orient $q"
1165
1166	set _click(x) $x
1167	set _click(y) $y
1168	}
1169	}
1170	release {
1171	Rotate drag $x $y
1172	$itk_component(view) configure -cursor ""
1173	catch {unset _click}
1174	}
1175	default {
1176	error "bad option \"$option\": should be click, drag, release"
1177	}
1178	}
1179	}
1180
1181	# ----------------------------------------------------------------------
1182	# USAGE: $this Pan click x y
1183	# $this Pan drag x y
1184	# $this Pan release x y
1185	#
1186	# Called automatically when the user clicks on one of the zoom
1187	# controls for this widget. Changes the zoom for the current view.
1188	# ----------------------------------------------------------------------
1189	itcl::body Rappture::NanovisViewer::Pan {option x y} {
1190	# Experimental stuff
1191	set w [winfo width $itk_component(view)]
1192	set h [winfo height $itk_component(view)]
1193	if { $option == "set" } {
1194	set x [expr $x / double($w)]
1195	set y [expr $y / double($h)]
1196	set _view(-xpan) [expr $_view(-xpan) + $x]
1197	set _view(-ypan) [expr $_view(-ypan) + $y]
1198	PanCamera
1199	set _settings(-xpan) $_view(-xpan)
1200	set _settings(-ypan) $_view(-ypan)
1201	return
1202	}
1203	if { $option == "click" } {
1204	set _click(x) $x
1205	set _click(y) $y
1206	$itk_component(view) configure -cursor hand1
1207	}
1208	if { $option == "drag" \|\| $option == "release" } {
1209	set dx [expr ($_click(x) - $x)/double($w)]
1210	set dy [expr ($_click(y) - $y)/double($h)]
1211	set _click(x) $x
1212	set _click(y) $y
1213	set _view(-xpan) [expr $_view(-xpan) - $dx]
1214	set _view(-ypan) [expr $_view(-ypan) - $dy]
1215	PanCamera
1216	set _settings(-xpan) $_view(-xpan)
1217	set _settings(-ypan) $_view(-ypan)
1218	}
1219	if { $option == "release" } {
1220	$itk_component(view) configure -cursor ""
1221	}
1222	}
1223
1224	# ----------------------------------------------------------------------
1225	# USAGE: InitSettings <what> ?<value>?
1226	#
1227	# Used internally to update rendering settings whenever parameters
1228	# change in the popup settings panel. Sends the new settings off
1229	# to the back end.
1230	# ----------------------------------------------------------------------
1231	itcl::body Rappture::NanovisViewer::InitSettings { args } {
1232	foreach arg $args {
1233	AdjustSetting $arg
1234	}
1235	}
1236
1237	# ----------------------------------------------------------------------
1238	# USAGE: AdjustSetting <what> ?<value>?
1239	#
1240	# Used internally to update rendering settings whenever parameters
1241	# change in the popup settings panel. Sends the new settings off
1242	# to the back end.
1243	# ----------------------------------------------------------------------
1244	itcl::body Rappture::NanovisViewer::AdjustSetting {what {value ""}} {
1245	if {![isconnected]} {
1246	return
1247	}
1248	switch -- $what {
1249	"-axesvisible" {
1250	SendCmd "axis visible $_settings($what)"
1251	}
1252	"-background" {
1253	set bgcolor [$itk_component(background) value]
1254	array set fgcolors {
1255	"black" "white"
1256	"white" "black"
1257	"grey" "black"
1258	}
1259	configure -plotbackground $bgcolor \
1260	-plotforeground $fgcolors($bgcolor)
1261	#DrawLegend $_current
1262	}
1263	"-colormap" {
1264	set color [$itk_component(colormap) value]
1265	set _settings($what) $color
1266	# Only set the colormap on the first volume. Ignore the others.
1267	#ResetColormap $color
1268	}
1269	"-cutplanesvisible" {
1270	set bool $_settings($what)
1271	# We only set cutplanes on the first dataset.
1272	set datasets [CurrentDatasets -cutplanes]
1273	set tag [lindex $datasets 0]
1274	SendCmd "cutplane visible $bool $tag"
1275	}
1276	"-gridvisible" {
1277	SendCmd "grid visible $_settings($what)"
1278	}
1279	"-isosurfaceshading" {
1280	set val $_settings($what)
1281	SendCmd "volume shading isosurface $val"
1282	}
1283	"-legendvisible" {
1284	if { $_settings($what) } {
1285	blt::table $itk_component(plotarea) \
1286	0,0 $itk_component(view) -fill both \
1287	1,0 $itk_component(legend) -fill x
1288	blt::table configure $itk_component(plotarea) r1 -resize none
1289	} else {
1290	blt::table forget $itk_component(legend)
1291	}
1292	}
1293	"-light" {
1294	set val $_settings($what)
1295	set diffuse [expr {0.01*$val}]
1296	set ambient [expr {1.0-$diffuse}]
1297	set specularLevel 0.3
1298	set specularExp 90.0
1299	SendCmd "volume shading ambient $ambient"
1300	SendCmd "volume shading diffuse $diffuse"
1301	SendCmd "volume shading specularLevel $specularLevel"
1302	SendCmd "volume shading specularExp $specularExp"
1303	}
1304	"-light2side" {
1305	set val $_settings($what)
1306	SendCmd "volume shading light2side $val"
1307	}
1308	"-opacity" {
1309	set val $_settings($what)
1310	set sval [expr { 0.01 * double($val) }]
1311	SendCmd "volume shading opacity $sval"
1312	}
1313	"-outlinevisible" {
1314	SendCmd "volume outline state $_settings($what)"
1315	}
1316	"-thickness" {
1317	if { [array names _activeTfs] > 0 } {
1318	set val $_settings($what)
1319	# Scale values between 0.00001 and 0.01000
1320	set sval [expr {0.0001*double($val)}]
1321	foreach tf [array names _activeTfs] {
1322	set _settings($tf${what}) $sval
1323	set _activeTfs($tf) 0
1324	}
1325	updateTransferFunctions
1326	}
1327	}
1328	"-volume" {
1329	set datasets [CurrentDatasets -cutplanes]
1330	SendCmd "volume data state $_settings($what) $datasets"
1331	}
1332	"-xcutplaneposition" - "-ycutplaneposition" - "-zcutplaneposition" {
1333	set axis [string range $what 1 1]
1334	set pos [expr $_settings($what) * 0.01]
1335	# We only set cutplanes on the first dataset.
1336	set datasets [CurrentDatasets -cutplanes]
1337	set tag [lindex $datasets 0]
1338	SendCmd "cutplane position $pos $axis $tag"
1339	}
1340	"-xcutplanevisible" - "-ycutplanevisible" - "-zcutplanevisible" {
1341	set axis [string range $what 1 1]
1342	set bool $_settings($what)
1343	# We only set cutplanes on the first dataset.
1344	set datasets [CurrentDatasets -cutplanes]
1345	set tag [lindex $datasets 0]
1346	SendCmd "cutplane state $bool $axis $tag"
1347	if { $bool } {
1348	$itk_component(${axis}CutScale) configure -state normal \
1349	-troughcolor white
1350	} else {
1351	$itk_component(${axis}CutScale) configure -state disabled \
1352	-troughcolor grey82
1353	}
1354	}
1355	default {
1356	error "don't know how to fix $what"
1357	}
1358	}
1359	}
1360
1361	# ----------------------------------------------------------------------
1362	# USAGE: FixLegend
1363	#
1364	# Used internally to update the legend area whenever it changes size
1365	# or when the field changes. Asks the server to send a new legend
1366	# for the current field.
1367	# ----------------------------------------------------------------------
1368	itcl::body Rappture::NanovisViewer::FixLegend {} {
1369	set _resizeLegendPending 0
1370	set lineht [font metrics $itk_option(-font) -linespace]
1371	set w [expr {$_width-20}]
1372	set h [expr {[winfo height $itk_component(legend)]-20-$lineht}]
1373	if {$w > 0 && $h > 0 && [array names _activeTfs] > 0 && $_first != "" } {
1374	set tag [lindex [CurrentDatasets] 0]
1375	if { [info exists _dataset2style($tag)] } {
1376	SendCmd "legend $_dataset2style($tag) $w $h"
1377	}
1378	}
1379	}
1380
1381	#
1382	# NameTransferFunction --
1383	#
1384	# Creates a transfer function name based on the <style> settings in the
1385	# library run.xml file. This placeholder will be used later to create
1386	# and send the actual transfer function once the data info has been sent
1387	# to us by the render server. [We won't know the volume limits until the
1388	# server parses the 3D data and sends back the limits via ReceiveData.]
1389	#
1390	# FIXME: The current way we generate transfer-function names completely
1391	# ignores the -markers option. The problem is that we are forced
1392	# to compute the name from an increasing complex set of values:
1393	# color, levels, markers.
1394	#
1395	itcl::body Rappture::NanovisViewer::NameTransferFunction { dataobj cname } {
1396	array set style {
1397	-color BCGYR
1398	-levels 6
1399	}
1400	set tag $dataobj-$cname
1401	array set style [lindex [$dataobj components -style $cname] 0]
1402	set tf "$style(-color):$style(-levels)"
1403	set _dataset2style($tag) $tf
1404	lappend _style2datasets($tf) $tag
1405	return $tf
1406	}
1407
1408	#
1409	# ComputeTransferFunction --
1410	#
1411	# Computes and sends the transfer function to the render server. It's
1412	# assumed that the volume data limits are known and that the global
1413	# transfer-functions slider values have been set up. Both parts are
1414	# needed to compute the relative value (location) of the marker, and
1415	# the alpha map of the transfer function.
1416	#
1417	itcl::body Rappture::NanovisViewer::ComputeTransferFunction { tf } {
1418	array set style {
1419	-color BCGYR
1420	-levels 6
1421	}
1422
1423	foreach {dataobj cname} [split [lindex $_style2datasets($tf) 0] -] break
1424	array set style [lindex [$dataobj components -style $cname] 0]
1425
1426	# We have to parse the style attributes for a volume using this
1427	# transfer-function once. This sets up the initial isomarkers for the
1428	# transfer function. The user may add/delete markers, so we have to
1429	# maintain a list of markers for each transfer-function. We use the one
1430	# of the volumes (the first in the list) using the transfer-function as a
1431	# reference.
1432	#
1433	# FIXME: The current way we generate transfer-function names completely
1434	# ignores the -markers option. The problem is that we are forced
1435	# to compute the name from an increasing complex set of values:
1436	# color, levels, markers.
1437	if { ![info exists _isomarkers($tf)] } {
1438	# Have to defer creation of isomarkers until we have data limits
1439	if { [info exists style(-markers)] &&
1440	[llength $style(-markers)] > 0 } {
1441	ParseMarkersOption $tf $style(-markers)
1442	} else {
1443	ParseLevelsOption $tf $style(-levels)
1444	}
1445	}
1446	set cmap [ColorsToColormap $style(-color)]
1447
1448	# Transfer function should be normalized with [0,1] range
1449	# The volume shading opacity setting is used to scale opacity
1450	# in the volume shader.
1451	set max 1.0
1452
1453	set isovalues {}
1454	foreach m $_isomarkers($tf) {
1455	lappend isovalues [$m relval]
1456	}
1457	# Sort the isovalues
1458	set isovalues [lsort -real $isovalues]
1459
1460	if { ![info exists _settings($tf-thickness)]} {
1461	set _settings($tf-thickness) 0.005
1462	}
1463	set delta $_settings($tf-thickness)
1464
1465	set first [lindex $isovalues 0]
1466	set last [lindex $isovalues end]
1467	set amap ""
1468	if { $first == "" \|\| $first != 0.0 } {
1469	lappend amap 0.0 0.0
1470	}
1471	foreach x $isovalues {
1472	set x1 [expr {$x-$delta-0.00001}]
1473	set x2 [expr {$x-$delta}]
1474	set x3 [expr {$x+$delta}]
1475	set x4 [expr {$x+$delta+0.00001}]
1476	if { $x1 < 0.0 } {
1477	set x1 0.0
1478	} elseif { $x1 > 1.0 } {
1479	set x1 1.0
1480	}
1481	if { $x2 < 0.0 } {
1482	set x2 0.0
1483	} elseif { $x2 > 1.0 } {
1484	set x2 1.0
1485	}
1486	if { $x3 < 0.0 } {
1487	set x3 0.0
1488	} elseif { $x3 > 1.0 } {
1489	set x3 1.0
1490	}
1491	if { $x4 < 0.0 } {
1492	set x4 0.0
1493	} elseif { $x4 > 1.0 } {
1494	set x4 1.0
1495	}
1496	# add spikes in the middle
1497	lappend amap $x1 0.0
1498	lappend amap $x2 $max
1499	lappend amap $x3 $max
1500	lappend amap $x4 0.0
1501	}
1502	if { $last == "" \|\| $last != 1.0 } {
1503	lappend amap 1.0 0.0
1504	}
1505	SendCmd "transfunc define $tf { $cmap } { $amap }"
1506	}
1507
1508	# ----------------------------------------------------------------------
1509	# CONFIGURATION OPTION: -plotbackground
1510	# ----------------------------------------------------------------------
1511	itcl::configbody Rappture::NanovisViewer::plotbackground {
1512	if { [isconnected] } {
1513	set color $itk_option(-plotbackground)
1514	set rgb [Color2RGB $color]
1515	SendCmd "screen bgcolor $rgb"
1516	$itk_component(legend) configure -background $color
1517	}
1518	}
1519
1520	# ----------------------------------------------------------------------
1521	# CONFIGURATION OPTION: -plotforeground
1522	# ----------------------------------------------------------------------
1523	itcl::configbody Rappture::NanovisViewer::plotforeground {
1524	if { [isconnected] } {
1525	set color $itk_option(-plotforeground)
1526	set rgb [Color2RGB $color]
1527	SendCmd "volume outline color $rgb"
1528	SendCmd "grid axiscolor $rgb"
1529	SendCmd "grid linecolor $rgb"
1530	$itk_component(legend) itemconfigure text -fill $color
1531	}
1532	}
1533
1534	# ----------------------------------------------------------------------
1535	# CONFIGURATION OPTION: -plotoutline
1536	# ----------------------------------------------------------------------
1537	itcl::configbody Rappture::NanovisViewer::plotoutline {
1538	# Must check if we are connected because this routine is called from the
1539	# class body when the -plotoutline itk_option is defined. At that point
1540	# the NanovisViewer class constructor hasn't been called, so we can't
1541	# start sending commands to visualization server.
1542	if { [isconnected] } {
1543	if {"" == $itk_option(-plotoutline)} {
1544	SendCmd "volume outline state off"
1545	} else {
1546	SendCmd "volume outline state on"
1547	SendCmd "volume outline color [Color2RGB $itk_option(-plotoutline)]"
1548	}
1549	}
1550	}
1551
1552	#
1553	# The -levels option takes a single value that represents the number
1554	# of evenly distributed markers based on the current data range. Each
1555	# marker is a relative value from 0.0 to 1.0.
1556	#
1557	itcl::body Rappture::NanovisViewer::ParseLevelsOption { tf levels } {
1558	set c $itk_component(legend)
1559	regsub -all "," $levels " " levels
1560	if {[string is int $levels]} {
1561	for {set i 1} { $i <= $levels } {incr i} {
1562	set x [expr {double($i)/($levels+1)}]
1563	set m [Rappture::IsoMarker \#auto $c $this $tf]
1564	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1565	$m relval $x
1566	lappend _isomarkers($tf) $m
1567	}
1568	} else {
1569	foreach x $levels {
1570	set m [Rappture::IsoMarker \#auto $c $this $tf]
1571	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1572	$m relval $x
1573	lappend _isomarkers($tf) $m
1574	}
1575	}
1576	}
1577
1578	#
1579	# The -markers option takes a list of zero or more values (the values
1580	# may be separated either by spaces or commas) that have the following
1581	# format:
1582	#
1583	# N% Percent of current total data range. Converted to
1584	# to a relative value between 0.0 and 1.0.
1585	# N Absolute value of marker. If the marker is outside of
1586	# the current range, it will be displayed on the outer
1587	# edge of the legends, but it range it represents will
1588	# not be seen.
1589	#
1590	itcl::body Rappture::NanovisViewer::ParseMarkersOption { tf markers } {
1591	set c $itk_component(legend)
1592	regsub -all "," $markers " " markers
1593	foreach marker $markers {
1594	set n [scan $marker "%g%s" value suffix]
1595	if { $n == 2 && $suffix == "%" } {
1596	# ${n}% : Set relative value.
1597	set value [expr {$value * 0.01}]
1598	set m [Rappture::IsoMarker \#auto $c $this $tf]
1599	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1600	$m relval $value
1601	lappend _isomarkers($tf) $m
1602	} else {
1603	# ${n} : Set absolute value.
1604	set m [Rappture::IsoMarker \#auto $c $this $tf]
1605	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1606	$m absval $value
1607	lappend _isomarkers($tf) $m
1608	}
1609	}
1610	}
1611
1612	itcl::body Rappture::NanovisViewer::updateTransferFunctions {} {
1613	$_dispatcher event -idle !send_transfunc
1614	}
1615
1616	itcl::body Rappture::NanovisViewer::AddIsoMarker { x y } {
1617	if { $_first == "" } {
1618	error "active transfer function isn't set"
1619	}
1620	set tag [lindex [CurrentDatasets] 0]
1621	set tf $_dataset2style($tag)
1622	set c $itk_component(legend)
1623	set m [Rappture::IsoMarker \#auto $c $this $tf]
1624	$itk_component(legend) itemconfigure labels -fill $itk_option(-plotforeground)
1625	set w [winfo width $c]
1626	$m relval [expr {double($x-10)/($w-20)}]
1627	lappend _isomarkers($tf) $m
1628	updateTransferFunctions
1629	return 1
1630	}
1631
1632	itcl::body Rappture::NanovisViewer::removeDuplicateMarker { marker x } {
1633	set tf [$marker transferfunc]
1634	set bool 0
1635	if { [info exists _isomarkers($tf)] } {
1636	set list {}
1637	set marker [namespace tail $marker]
1638	foreach m $_isomarkers($tf) {
1639	set sx [$m screenpos]
1640	if { $m != $marker } {
1641	if { $x >= ($sx-3) && $x <= ($sx+3) } {
1642	$marker relval [$m relval]
1643	itcl::delete object $m
1644	bell
1645	set bool 1
1646	continue
1647	}
1648	}
1649	lappend list $m
1650	}
1651	set _isomarkers($tf) $list
1652	updateTransferFunctions
1653	}
1654	return $bool
1655	}
1656
1657	itcl::body Rappture::NanovisViewer::overMarker { marker x } {
1658	set tf [$marker transferfunc]
1659	if { [info exists _isomarkers($tf)] } {
1660	set marker [namespace tail $marker]
1661	foreach m $_isomarkers($tf) {
1662	set sx [$m screenpos]
1663	if { $m != $marker } {
1664	set bool [expr { $x >= ($sx-3) && $x <= ($sx+3) }]
1665	$m activate $bool
1666	}
1667	}
1668	}
1669	return ""
1670	}
1671
1672	itcl::body Rappture::NanovisViewer::limits { tf } {
1673	set _limits(min) 0.0
1674	set _limits(max) 1.0
1675	if { ![info exists _style2datasets($tf)] } {
1676	return [array get _limits]
1677	}
1678	set min ""; set max ""
1679	foreach tag $_style2datasets($tf) {
1680	if { ![info exists _serverDatasets($tag)] } {
1681	continue
1682	}
1683	if { ![info exists _limits($tag-min)] } {
1684	continue
1685	}
1686	if { $min == "" \|\| $min > $_limits($tag-min) } {
1687	set min $_limits($tag-min)
1688	}
1689	if { $max == "" \|\| $max < $_limits($tag-max) } {
1690	set max $_limits($tag-max)
1691	}
1692	}
1693	if { $min != "" } {
1694	set _limits(min) $min
1695	}
1696	if { $max != "" } {
1697	set _limits(max) $max
1698	}
1699	return [array get _limits]
1700	}
1701
1702	itcl::body Rappture::NanovisViewer::BuildViewTab {} {
1703	set fg [option get $itk_component(hull) font Font]
1704	#set bfg [option get $itk_component(hull) boldFont Font]
1705
1706	set inner [$itk_component(main) insert end \
1707	-title "View Settings" \
1708	-icon [Rappture::icon wrench]]
1709	$inner configure -borderwidth 4
1710
1711	checkbutton $inner.axes \
1712	-text "Axes" \
1713	-variable [itcl::scope _settings(-axesvisible)] \
1714	-command [itcl::code $this AdjustSetting -axesvisible] \
1715	-font "Arial 9"
1716
1717	checkbutton $inner.grid \
1718	-text "Grid" \
1719	-variable [itcl::scope _settings(-gridvisible)] \
1720	-command [itcl::code $this AdjustSetting -gridvisible] \
1721	-font "Arial 9"
1722
1723	checkbutton $inner.outline \
1724	-text "Outline" \
1725	-variable [itcl::scope _settings(-outlinevisible)] \
1726	-command [itcl::code $this AdjustSetting -outlinevisible] \
1727	-font "Arial 9"
1728
1729	checkbutton $inner.legend \
1730	-text "Legend" \
1731	-variable [itcl::scope _settings(-legendvisible)] \
1732	-command [itcl::code $this AdjustSetting -legendvisible] \
1733	-font "Arial 9"
1734
1735	checkbutton $inner.volume \
1736	-text "Volume" \
1737	-variable [itcl::scope _settings(-volume)] \
1738	-command [itcl::code $this AdjustSetting -volume] \
1739	-font "Arial 9"
1740
1741	label $inner.background_l -text "Background" -font "Arial 9"
1742	itk_component add background {
1743	Rappture::Combobox $inner.background -width 10 -editable no
1744	}
1745	$inner.background choices insert end \
1746	"black" "black" \
1747	"white" "white" \
1748	"grey" "grey"
1749
1750	$itk_component(background) value $_settings(-background)
1751	bind $inner.background <<Value>> \
1752	[itcl::code $this AdjustSetting -background]
1753
1754	blt::table $inner \
1755	0,0 $inner.axes -cspan 2 -anchor w \
1756	1,0 $inner.grid -cspan 2 -anchor w \
1757	2,0 $inner.outline -cspan 2 -anchor w \
1758	3,0 $inner.volume -cspan 2 -anchor w \
1759	4,0 $inner.legend -cspan 2 -anchor w \
1760	5,0 $inner.background_l -anchor e -pady 2 \
1761	5,1 $inner.background -fill x
1762
1763	blt::table configure $inner r* -resize none
1764	blt::table configure $inner r6 -resize expand
1765	}
1766
1767	itcl::body Rappture::NanovisViewer::BuildVolumeTab {} {
1768	set inner [$itk_component(main) insert end \
1769	-title "Volume Settings" \
1770	-icon [Rappture::icon volume-on]]
1771	$inner configure -borderwidth 4
1772
1773	set fg [option get $itk_component(hull) font Font]
1774	#set bfg [option get $itk_component(hull) boldFont Font]
1775
1776	checkbutton $inner.vol -text "Show volume" -font $fg \
1777	-variable [itcl::scope _settings(-volume)] \
1778	-command [itcl::code $this AdjustSetting -volume]
1779	label $inner.shading -text "Shading:" -font $fg
1780
1781	checkbutton $inner.isosurface -text "Isosurface shading" -font $fg \
1782	-variable [itcl::scope _settings(-isosurfaceshading)] \
1783	-command [itcl::code $this AdjustSetting -isosurfaceshading]
1784
1785	checkbutton $inner.light2side -text "Two-sided lighting" -font $fg \
1786	-variable [itcl::scope _settings(-light2side)] \
1787	-command [itcl::code $this AdjustSetting -light2side]
1788
1789	label $inner.dim -text "Glow" -font $fg
1790	::scale $inner.light -from 0 -to 100 -orient horizontal \
1791	-variable [itcl::scope _settings(-light)] \
1792	-width 10 \
1793	-showvalue off -command [itcl::code $this AdjustSetting -light]
1794	label $inner.bright -text "Surface" -font $fg
1795
1796	# Opacity
1797	label $inner.clear -text "Clear" -font $fg
1798	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1799	-variable [itcl::scope _settings(-opacity)] \
1800	-width 10 \
1801	-showvalue off -command [itcl::code $this AdjustSetting -opacity]
1802	label $inner.opaque -text "Opaque" -font $fg
1803
1804	# Tooth thickness
1805	label $inner.thin -text "Thin" -font $fg
1806	::scale $inner.thickness -from 0 -to 1000 -orient horizontal \
1807	-variable [itcl::scope _settings(-thickness)] \
1808	-width 10 \
1809	-showvalue off -command [itcl::code $this AdjustSetting -thickness]
1810	label $inner.thick -text "Thick" -font $fg
1811
1812	# Colormap
1813	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1814	itk_component add colormap {
1815	Rappture::Combobox $inner.colormap -width 10 -editable no
1816	}
1817
1818	$inner.colormap choices insert end [GetColormapList -includeNone]
1819	$itk_component(colormap) value "BCGYR"
1820	bind $inner.colormap <<Value>> \
1821	[itcl::code $this AdjustSetting -colormap]
1822
1823	blt::table $inner \
1824	0,0 $inner.vol -cspan 4 -anchor w -pady 2 \
1825	1,0 $inner.shading -cspan 4 -anchor w -pady {10 2} \
1826	2,0 $inner.light2side -cspan 4 -anchor w -pady 2 \
1827	3,0 $inner.dim -anchor e -pady 2 \
1828	3,1 $inner.light -cspan 2 -pady 2 -fill x \
1829	3,3 $inner.bright -anchor w -pady 2 \
1830	4,0 $inner.clear -anchor e -pady 2 \
1831	4,1 $inner.opacity -cspan 2 -pady 2 -fill x \
1832	4,3 $inner.opaque -anchor w -pady 2 \
1833	5,0 $inner.thin -anchor e -pady 2 \
1834	5,1 $inner.thickness -cspan 2 -pady 2 -fill x\
1835	5,3 $inner.thick -anchor w -pady 2
1836
1837	blt::table configure $inner c0 c1 c3 r* -resize none
1838	blt::table configure $inner r6 -resize expand
1839	}
1840
1841	itcl::body Rappture::NanovisViewer::BuildCutplanesTab {} {
1842	set inner [$itk_component(main) insert end \
1843	-title "Cutplane Settings" \
1844	-icon [Rappture::icon cutbutton]]
1845	$inner configure -borderwidth 4
1846
1847	checkbutton $inner.visible \
1848	-text "Show Cutplanes" \
1849	-variable [itcl::scope _settings(-cutplanesvisible)] \
1850	-command [itcl::code $this AdjustSetting -cutplanesvisible] \
1851	-font "Arial 9"
1852
1853	# X-value slicer...
1854	itk_component add xCutButton {
1855	Rappture::PushButton $inner.xbutton \
1856	-onimage [Rappture::icon x-cutplane] \
1857	-offimage [Rappture::icon x-cutplane] \
1858	-command [itcl::code $this AdjustSetting -xcutplanevisible] \
1859	-variable [itcl::scope _settings(-xcutplanevisible)]
1860	}
1861	Rappture::Tooltip::for $itk_component(xCutButton) \
1862	"Toggle the X cut plane on/off"
1863	#$itk_component(xCutButton) select
1864
1865	itk_component add xCutScale {
1866	::scale $inner.xval -from 100 -to 0 \
1867	-width 10 -orient vertical -showvalue off \
1868	-borderwidth 1 -highlightthickness 0 \
1869	-command [itcl::code $this Slice move x] \
1870	-variable [itcl::scope _settings(-xcutplaneposition)]
1871	} {
1872	usual
1873	ignore -borderwidth -highlightthickness
1874	}
1875	# Set the default cutplane value before disabling the scale.
1876	$itk_component(xCutScale) set 50
1877	$itk_component(xCutScale) configure -state disabled
1878	Rappture::Tooltip::for $itk_component(xCutScale) \
1879	"@[itcl::code $this SlicerTip x]"
1880
1881	# Y-value slicer...
1882	itk_component add yCutButton {
1883	Rappture::PushButton $inner.ybutton \
1884	-onimage [Rappture::icon y-cutplane] \
1885	-offimage [Rappture::icon y-cutplane] \
1886	-command [itcl::code $this AdjustSetting -ycutplanevisible] \
1887	-variable [itcl::scope _settings(-ycutplanevisible)]
1888	}
1889	Rappture::Tooltip::for $itk_component(yCutButton) \
1890	"Toggle the Y cut plane on/off"
1891	#$itk_component(yCutButton) select
1892
1893	itk_component add yCutScale {
1894	::scale $inner.yval -from 100 -to 0 \
1895	-width 10 -orient vertical -showvalue off \
1896	-borderwidth 1 -highlightthickness 0 \
1897	-command [itcl::code $this Slice move y] \
1898	-variable [itcl::scope _settings(-ycutplaneposition)]
1899	} {
1900	usual
1901	ignore -borderwidth -highlightthickness
1902	}
1903	Rappture::Tooltip::for $itk_component(yCutScale) \
1904	"@[itcl::code $this SlicerTip y]"
1905	# Set the default cutplane value before disabling the scale.
1906	$itk_component(yCutScale) set 50
1907	$itk_component(yCutScale) configure -state disabled
1908
1909	# Z-value slicer...
1910	itk_component add zCutButton {
1911	Rappture::PushButton $inner.zbutton \
1912	-onimage [Rappture::icon z-cutplane] \
1913	-offimage [Rappture::icon z-cutplane] \
1914	-command [itcl::code $this AdjustSetting -zcutplanevisible] \
1915	-variable [itcl::scope _settings(-zcutplanevisible)]
1916	}
1917	Rappture::Tooltip::for $itk_component(zCutButton) \
1918	"Toggle the Z cut plane on/off"
1919	#$itk_component(zCutButton) select
1920
1921	itk_component add zCutScale {
1922	::scale $inner.zval -from 100 -to 0 \
1923	-width 10 -orient vertical -showvalue off \
1924	-borderwidth 1 -highlightthickness 0 \
1925	-command [itcl::code $this Slice move z] \
1926	-variable [itcl::scope _settings(-zcutplaneposition)]
1927	} {
1928	usual
1929	ignore -borderwidth -highlightthickness
1930	}
1931	$itk_component(zCutScale) set 50
1932	$itk_component(zCutScale) configure -state disabled
1933	Rappture::Tooltip::for $itk_component(zCutScale) \
1934	"@[itcl::code $this SlicerTip z]"
1935
1936	blt::table $inner \
1937	0,1 $itk_component(xCutScale) \
1938	0,2 $itk_component(yCutScale) \
1939	0,3 $itk_component(zCutScale) \
1940	1,1 $itk_component(xCutButton) \
1941	1,2 $itk_component(yCutButton) \
1942	1,3 $itk_component(zCutButton)
1943
1944	# 0,1 $inner.visible -anchor w -pady 2 -cspan 4 \
1945
1946	blt::table configure $inner r0 r1 r2 c* -resize none
1947	blt::table configure $inner r3 c4 -resize expand
1948	blt::table configure $inner c0 -width 2
1949	blt::table configure $inner c1 c2 c3 -padx 2
1950	}
1951
1952	itcl::body Rappture::NanovisViewer::BuildCameraTab {} {
1953	set inner [$itk_component(main) insert end \
1954	-title "Camera Settings" \
1955	-icon [Rappture::icon camera]]
1956	$inner configure -borderwidth 4
1957
1958	label $inner.view_l -text "view" -font "Arial 9"
1959	set f [frame $inner.view]
1960	foreach side { front back left right top bottom } {
1961	button $f.$side -image [Rappture::icon view$side] \
1962	-command [itcl::code $this SetOrientation $side]
1963	Rappture::Tooltip::for $f.$side "Change the view to $side"
1964	pack $f.$side -side left
1965	}
1966
1967	blt::table $inner \
1968	0,0 $inner.view_l -anchor e -pady 2 \
1969	0,1 $inner.view -anchor w -pady 2
1970	blt::table configure $inner r0 -resize none
1971
1972	set row 1
1973	set labels { qw qx qy qz xpan ypan zoom }
1974	foreach tag $labels {
1975	label $inner.${tag}label -text $tag -font "Arial 9"
1976	entry $inner.${tag} -font "Arial 9" -bg white \
1977	-textvariable [itcl::scope _settings(-$tag)]
1978	bind $inner.${tag} <Return> \
1979	[itcl::code $this camera set -${tag}]
1980	bind $inner.${tag} <KP_Enter> \
1981	[itcl::code $this camera set -${tag}]
1982	blt::table $inner \
1983	$row,0 $inner.${tag}label -anchor e -pady 2 \
1984	$row,1 $inner.${tag} -anchor w -pady 2
1985	blt::table configure $inner r$row -resize none
1986	incr row
1987	}
1988
1989	blt::table configure $inner c* -resize none
1990	blt::table configure $inner c2 -resize expand
1991	blt::table configure $inner r$row -resize expand
1992	}
1993
1994	# ----------------------------------------------------------------------
1995	# USAGE: Slice move x\|y\|z <newval>
1996	#
1997	# Called automatically when the user drags the slider to move the
1998	# cut plane that slices 3D data. Gets the current value from the
1999	# slider and moves the cut plane to the appropriate point in the
2000	# data set.
2001	# ----------------------------------------------------------------------
2002	itcl::body Rappture::NanovisViewer::Slice {option args} {
2003	switch -- $option {
2004	move {
2005	if {[llength $args] != 2} {
2006	error "wrong # args: should be \"Slice move x\|y\|z newval\""
2007	}
2008	set axis [lindex $args 0]
2009	set newval [lindex $args 1]
2010
2011	set newpos [expr {0.01*$newval}]
2012	set datasets [CurrentDatasets -cutplanes]
2013	set tag [lindex $datasets 0]
2014	SendCmd "cutplane position $newpos $axis $tag"
2015	}
2016	default {
2017	error "bad option \"$option\": should be axis, move, or volume"
2018	}
2019	}
2020	}
2021
2022	# ----------------------------------------------------------------------
2023	# USAGE: SlicerTip <axis>
2024	#
2025	# Used internally to generate a tooltip for the x/y/z slicer controls.
2026	# Returns a message that includes the current slicer value.
2027	# ----------------------------------------------------------------------
2028	itcl::body Rappture::NanovisViewer::SlicerTip {axis} {
2029	set val [$itk_component(${axis}CutScale) get]
2030	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
2031	}
2032
2033	itcl::body Rappture::NanovisViewer::DoResize {} {
2034	$_arcball resize $_width $_height
2035	SendCmd "screen size $_width $_height"
2036	set _resizePending 0
2037	}
2038
2039	itcl::body Rappture::NanovisViewer::EventuallyResize { w h } {
2040	set _width $w
2041	set _height $h
2042	$_arcball resize $w $h
2043	if { !$_resizePending } {
2044	$_dispatcher event -idle !resize
2045	set _resizePending 1
2046	}
2047	}
2048
2049	itcl::body Rappture::NanovisViewer::EventuallyRedrawLegend {} {
2050	if { !$_resizeLegendPending } {
2051	$_dispatcher event -idle !legend
2052	set _resizeLegendPending 1
2053	}
2054	}
2055
2056	# camera --
2057	#
2058	itcl::body Rappture::NanovisViewer::camera {option args} {
2059	switch -- $option {
2060	"show" {
2061	puts [array get _view]
2062	}
2063	"set" {
2064	set what [lindex $args 0]
2065	set x $_settings($what)
2066	set code [catch { string is double $x } result]
2067	if { $code != 0 \|\| !$result } {
2068	set _settings($what) $_view($what)
2069	return
2070	}
2071	switch -- $what {
2072	"-xpan" - "-ypan" {
2073	set _view($what) $_settings($what)
2074	PanCamera
2075	}
2076	"-qx" - "-qy" - "-qz" - "-qw" {
2077	set _view($what) $_settings($what)
2078	set q [ViewToQuaternion]
2079	$_arcball quaternion $q
2080	SendCmd "camera orient $q"
2081	}
2082	"-zoom" {
2083	set _view($what) $_settings($what)
2084	SendCmd "camera zoom $_view($what)"
2085	}
2086	}
2087	}
2088	}
2089	}
2090
2091	itcl::body Rappture::NanovisViewer::GetVtkData { args } {
2092	# FIXME: We can only put one component of one dataset in a single
2093	# VTK file. To download all components/results, we would need
2094	# to put them in an archive (e.g. zip or tar file)
2095	if { $_first != ""} {
2096	set cname [lindex [$_first components] 0]
2097	set bytes [$_first vtkdata $cname]
2098	return [list .vtk $bytes]
2099	}
2100	puts stderr "Failed to get vtkdata"
2101	return ""
2102	}
2103
2104	itcl::body Rappture::NanovisViewer::GetImage { args } {
2105	if { [image width $_image(download)] > 0 &&
2106	[image height $_image(download)] > 0 } {
2107	set bytes [$_image(download) data -format "jpeg -quality 100"]
2108	set bytes [Rappture::encoding::decode -as b64 $bytes]
2109	return [list .jpg $bytes]
2110	}
2111	return ""
2112	}
2113
2114	itcl::body Rappture::NanovisViewer::BuildDownloadPopup { popup command } {
2115	Rappture::Balloon $popup \
2116	-title "[Rappture::filexfer::label downloadWord] as..."
2117	set inner [$popup component inner]
2118	label $inner.summary -text "" -anchor w
2119
2120	radiobutton $inner.vtk_button -text "VTK data file" \
2121	-variable [itcl::scope _downloadPopup(format)] \
2122	-font "Arial 9" \
2123	-value vtk
2124	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
2125
2126	radiobutton $inner.image_button -text "Image File" \
2127	-variable [itcl::scope _downloadPopup(format)] \
2128	-font "Arial 9 " \
2129	-value image
2130	Rappture::Tooltip::for $inner.image_button \
2131	"Save as digital image."
2132
2133	button $inner.ok -text "Save" \
2134	-highlightthickness 0 -pady 2 -padx 3 \
2135	-command $command \
2136	-compound left \
2137	-image [Rappture::icon download]
2138
2139	button $inner.cancel -text "Cancel" \
2140	-highlightthickness 0 -pady 2 -padx 3 \
2141	-command [list $popup deactivate] \
2142	-compound left \
2143	-image [Rappture::icon cancel]
2144
2145	blt::table $inner \
2146	0,0 $inner.summary -cspan 2 \
2147	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2148	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2149	4,1 $inner.cancel -width .9i -fill y \
2150	4,0 $inner.ok -padx 2 -width .9i -fill y
2151	blt::table configure $inner r3 -height 4
2152	blt::table configure $inner r4 -pady 4
2153	raise $inner.image_button
2154	$inner.vtk_button invoke
2155	return $inner
2156	}
2157
2158	itcl::body Rappture::NanovisViewer::SetOrientation { side } {
2159	array set positions {
2160	front "1 0 0 0"
2161	back "0 0 1 0"
2162	left "0.707107 0 -0.707107 0"
2163	right "0.707107 0 0.707107 0"
2164	top "0.707107 -0.707107 0 0"
2165	bottom "0.707107 0.707107 0 0"
2166	}
2167	foreach name { -qw -qx -qy -qz } value $positions($side) {
2168	set _view($name) $value
2169	}
2170	set q [ViewToQuaternion]
2171	$_arcball quaternion $q
2172	SendCmd "camera orient $q"
2173	SendCmd "camera reset"
2174	set _view(-xpan) 0
2175	set _view(-ypan) 0
2176	set _view(-zoom) 1.0
2177	set _settings(-xpan) $_view(-xpan)
2178	set _settings(-ypan) $_view(-ypan)
2179	set _settings(-zoom) $_view(-zoom)
2180	}

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