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source: branches/1.3/gui/scripts/vtkvolumeviewer.tcl @ 4335

Last change on this file since 4335 was 4335, checked in by ldelgass, 10 years ago
Disable debug prints
File size: 77.3 KB

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1	# -- mode: tcl; indent-tabs-mode: nil --
2
3	# ----------------------------------------------------------------------
4	# COMPONENT: VtkVolumeViewer - Vtk volume viewer
5	#
6	# It connects to the Vtk server running on a rendering farm,
7	# transmits data, and displays the results.
8	# ======================================================================
9	# AUTHOR: Michael McLennan, Purdue University
10	# Copyright (c) 2004-2012 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 *VtkVolumeViewer.width 4i widgetDefault
20	option add VtkVolumeViewercursor crosshair widgetDefault
21	option add *VtkVolumeViewer.height 4i widgetDefault
22	option add *VtkVolumeViewer.foreground black widgetDefault
23	option add *VtkVolumeViewer.controlBackground gray widgetDefault
24	option add *VtkVolumeViewer.controlDarkBackground #999999 widgetDefault
25	option add *VtkVolumeViewer.plotBackground black widgetDefault
26	option add *VtkVolumeViewer.plotForeground white widgetDefault
27	option add *VtkVolumeViewer.font \
28	--helvetica-medium-r-normal--12-* widgetDefault
29
30	# must use this name -- plugs into Rappture::resources::load
31	proc VtkVolumeViewer_init_resources {} {
32	Rappture::resources::register \
33	vtkvis_server Rappture::VtkVolumeViewer::SetServerList
34	}
35
36	itcl::class Rappture::VtkVolumeViewer {
37	inherit Rappture::VisViewer
38
39	itk_option define -plotforeground plotForeground Foreground ""
40	itk_option define -plotbackground plotBackground Background ""
41
42	constructor { hostlist args } {
43	Rappture::VisViewer::constructor $hostlist
44	} {
45	# defined below
46	}
47	destructor {
48	# defined below
49	}
50	public proc SetServerList { namelist } {
51	Rappture::VisViewer::SetServerList "vtkvis" $namelist
52	}
53	public method add {dataobj {settings ""}}
54	public method camera {option args}
55	public method delete {args}
56	public method disconnect {}
57	public method download {option args}
58	public method get {args}
59	public method isconnected {}
60	public method parameters {title args} {
61	# do nothing
62	}
63	public method scale {args}
64
65	protected method Connect {}
66	protected method CurrentDatasets {args}
67	protected method Disconnect {}
68	protected method DoResize {}
69	protected method DoReseed {}
70	protected method DoRotate {}
71	protected method AdjustSetting {what {value ""}}
72	protected method InitSettings { args }
73	protected method Pan {option x y}
74	protected method Pick {x y}
75	protected method Rebuild {}
76	protected method ReceiveDataset { args }
77	protected method ReceiveImage { args }
78	protected method ReceiveLegend { colormap title vmin vmax size }
79	protected method Rotate {option x y}
80	protected method Zoom {option}
81
82	# The following methods are only used by this class.
83	private method BuildAxisTab {}
84	private method BuildCameraTab {}
85	private method BuildColormap { name colors }
86	private method BuildCutplaneTab {}
87	private method BuildDownloadPopup { widget command }
88	private method BuildVolumeTab {}
89	private method DrawLegend {}
90	private method Combo { option }
91	private method EnterLegend { x y }
92	private method EventuallyResize { w h }
93	private method EventuallyReseed { numPoints }
94	private method EventuallyRotate { q }
95	private method EventuallySetCutplane { axis args }
96	private method GetImage { args }
97	private method GetVtkData { args }
98	private method IsValidObject { dataobj }
99	private method LeaveLegend {}
100	private method MotionLegend { x y }
101	private method PanCamera {}
102	private method RequestLegend {}
103	private method SetColormap { dataobj comp }
104	private method ChangeColormap { dataobj comp color }
105	private method SetLegendTip { x y }
106	private method SetObjectStyle { dataobj comp }
107	private method Slice {option args}
108
109	private variable _arcball ""
110	private variable _dlist "" ; # list of data objects
111	private variable _obj2datasets
112	private variable _obj2ovride ; # maps dataobj => style override
113	private variable _datasets ; # contains all the dataobj-component
114	; # datasets in the server
115	private variable _colormaps ; # contains all the colormaps
116	; # in the server.
117	private variable _dataset2style ;# maps dataobj-component to transfunc
118
119	private variable _click ; # info used for rotate operations
120	private variable _limits ; # autoscale min/max for all axes
121	private variable _view ; # view params for 3D view
122	private variable _settings
123	private variable _style; # Array of current component styles.
124	private variable _initialStyle; # Array of initial component styles.
125	private variable _reset 1; # indicates if camera needs to be reset
126	# to starting position.
127
128	private variable _first "" ; # This is the topmost dataset.
129	private variable _start 0
130	private variable _title ""
131	private variable _seeds
132
133	common _downloadPopup; # download options from popup
134	private common _hardcopy
135	private variable _width 0
136	private variable _height 0
137	private variable _resizePending 0
138	private variable _reseedPending 0
139	private variable _rotatePending 0
140	private variable _cutplanePending 0
141	private variable _legendPending 0
142	private variable _fields
143	private variable _curFldName ""
144	private variable _curFldLabel ""
145	private variable _colorMode "vmag";# Mode of colormap (vmag or scalar)
146	}
147
148	itk::usual VtkVolumeViewer {
149	keep -background -foreground -cursor -font
150	keep -plotbackground -plotforeground
151	}
152
153	# ----------------------------------------------------------------------
154	# CONSTRUCTOR
155	# ----------------------------------------------------------------------
156	itcl::body Rappture::VtkVolumeViewer::constructor {hostlist args} {
157	package require vtk
158	set _serverType "vtkvis"
159
160	# Rebuild event
161	$_dispatcher register !rebuild
162	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
163
164	# Resize event
165	$_dispatcher register !resize
166	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
167
168	# Reseed event
169	$_dispatcher register !reseed
170	$_dispatcher dispatch $this !reseed "[itcl::code $this DoReseed]; list"
171
172	# Rotate event
173	$_dispatcher register !rotate
174	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
175
176	# Legend event
177	$_dispatcher register !legend
178	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
179
180	# X-Cutplane event
181	$_dispatcher register !xcutplane
182	$_dispatcher dispatch $this !xcutplane \
183	"[itcl::code $this AdjustSetting cutplane-xposition]; list"
184
185	# Y-Cutplane event
186	$_dispatcher register !ycutplane
187	$_dispatcher dispatch $this !ycutplane \
188	"[itcl::code $this AdjustSetting cutplane-yposition]; list"
189
190	# Z-Cutplane event
191	$_dispatcher register !zcutplane
192	$_dispatcher dispatch $this !zcutplane \
193	"[itcl::code $this AdjustSetting cutplane-zposition]; list"
194
195	#
196	# Populate parser with commands handle incoming requests
197	#
198	$_parser alias image [itcl::code $this ReceiveImage]
199	$_parser alias dataset [itcl::code $this ReceiveDataset]
200	$_parser alias legend [itcl::code $this ReceiveLegend]
201
202	# Initialize the view to some default parameters.
203	array set _view {
204	qw 0.853553
205	qx -0.353553
206	qy 0.353553
207	qz 0.146447
208	zoom 1.0
209	xpan 0
210	ypan 0
211	ortho 0
212	}
213	set _arcball [blt::arcball create 100 100]
214	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
215	$_arcball quaternion $q
216
217	array set _settings {
218	axis-xgrid 0
219	axis-ygrid 0
220	axis-zgrid 0
221	axesVisible 1
222	axisLabels 1
223	cutplaneEdges 0
224	cutplane-xvisible 1
225	cutplane-yvisible 1
226	cutplane-zvisible 1
227	cutplane-xposition 50
228	cutplane-yposition 50
229	cutplane-zposition 50
230	cutplaneVisible 0
231	cutplaneLighting 1
232	cutplaneWireframe 0
233	cutplane-opacity 100
234	volumeLighting 1
235	volume-material 80
236	volume-opacity 40
237	volume-quality 50
238	volumeVisible 1
239	legendVisible 1
240	}
241
242	itk_component add view {
243	canvas $itk_component(plotarea).view \
244	-highlightthickness 0 -borderwidth 0
245	} {
246	usual
247	ignore -highlightthickness -borderwidth -background
248	}
249
250	itk_component add fieldmenu {
251	menu $itk_component(plotarea).menu -bg black -fg white -relief flat \
252	-tearoff no
253	} {
254	usual
255	ignore -background -foreground -relief -tearoff
256	}
257	set c $itk_component(view)
258	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
259	bind $c <4> [itcl::code $this Zoom in 0.25]
260	bind $c <5> [itcl::code $this Zoom out 0.25]
261	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
262	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
263	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
264	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
265	bind $c <Enter> "focus %W"
266	bind $c <Control-F1> [itcl::code $this ToggleConsole]
267
268	# Fixes the scrollregion in case we go off screen
269	$c configure -scrollregion [$c bbox all]
270
271	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
272	set _map(cwidth) -1
273	set _map(cheight) -1
274	set _map(zoom) 1.0
275	set _map(original) ""
276
277	set f [$itk_component(main) component controls]
278	itk_component add reset {
279	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
280	-highlightthickness 0 \
281	-image [Rappture::icon reset-view] \
282	-command [itcl::code $this Zoom reset]
283	} {
284	usual
285	ignore -highlightthickness
286	}
287	pack $itk_component(reset) -side top -padx 2 -pady 2
288	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
289
290	itk_component add zoomin {
291	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
292	-highlightthickness 0 \
293	-image [Rappture::icon zoom-in] \
294	-command [itcl::code $this Zoom in]
295	} {
296	usual
297	ignore -highlightthickness
298	}
299	pack $itk_component(zoomin) -side top -padx 2 -pady 2
300	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
301
302	itk_component add zoomout {
303	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
304	-highlightthickness 0 \
305	-image [Rappture::icon zoom-out] \
306	-command [itcl::code $this Zoom out]
307	} {
308	usual
309	ignore -highlightthickness
310	}
311	pack $itk_component(zoomout) -side top -padx 2 -pady 2
312	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
313
314	itk_component add volume {
315	Rappture::PushButton $f.volume \
316	-onimage [Rappture::icon volume-on] \
317	-offimage [Rappture::icon volume-off] \
318	-variable [itcl::scope _settings(volumeVisible)] \
319	-command [itcl::code $this AdjustSetting volumeVisible]
320	}
321	$itk_component(volume) select
322	Rappture::Tooltip::for $itk_component(volume) \
323	"Don't display the volume"
324	pack $itk_component(volume) -padx 2 -pady 2
325
326	itk_component add cutplane {
327	Rappture::PushButton $f.cutplane \
328	-onimage [Rappture::icon cutbutton] \
329	-offimage [Rappture::icon cutbutton] \
330	-variable [itcl::scope _settings(cutplaneVisible)] \
331	-command [itcl::code $this AdjustSetting cutplaneVisible]
332	}
333	Rappture::Tooltip::for $itk_component(cutplane) \
334	"Show/Hide cutplanes"
335	pack $itk_component(cutplane) -padx 2 -pady 2
336
337
338	if { [catch {
339	BuildVolumeTab
340	BuildCutplaneTab
341	BuildAxisTab
342	BuildCameraTab
343	} errs] != 0 } {
344	puts stderr errs=$errs
345	}
346	# Legend
347
348	set _image(legend) [image create photo]
349	itk_component add legend {
350	canvas $itk_component(plotarea).legend -width 50 -highlightthickness 0
351	} {
352	usual
353	ignore -highlightthickness
354	rename -background -plotbackground plotBackground Background
355	}
356
357	# Hack around the Tk panewindow. The problem is that the requested
358	# size of the 3d view isn't set until an image is retrieved from
359	# the server. So the panewindow uses the tiny size.
360	set w 10000
361	pack forget $itk_component(view)
362	blt::table $itk_component(plotarea) \
363	0,0 $itk_component(view) -fill both -reqwidth $w
364	blt::table configure $itk_component(plotarea) c1 -resize none
365
366	# Bindings for rotation via mouse
367	bind $itk_component(view) <ButtonPress-1> \
368	[itcl::code $this Rotate click %x %y]
369	bind $itk_component(view) <B1-Motion> \
370	[itcl::code $this Rotate drag %x %y]
371	bind $itk_component(view) <ButtonRelease-1> \
372	[itcl::code $this Rotate release %x %y]
373	bind $itk_component(view) <Configure> \
374	[itcl::code $this EventuallyResize %w %h]
375
376	if 0 {
377	bind $itk_component(view) <Configure> \
378	[itcl::code $this EventuallyResize %w %h]
379	}
380	# Bindings for panning via mouse
381	bind $itk_component(view) <ButtonPress-2> \
382	[itcl::code $this Pan click %x %y]
383	bind $itk_component(view) <B2-Motion> \
384	[itcl::code $this Pan drag %x %y]
385	bind $itk_component(view) <ButtonRelease-2> \
386	[itcl::code $this Pan release %x %y]
387
388	#bind $itk_component(view) <ButtonRelease-3> \
389	# [itcl::code $this Pick %x %y]
390
391	# Bindings for panning via keyboard
392	bind $itk_component(view) <KeyPress-Left> \
393	[itcl::code $this Pan set -10 0]
394	bind $itk_component(view) <KeyPress-Right> \
395	[itcl::code $this Pan set 10 0]
396	bind $itk_component(view) <KeyPress-Up> \
397	[itcl::code $this Pan set 0 -10]
398	bind $itk_component(view) <KeyPress-Down> \
399	[itcl::code $this Pan set 0 10]
400	bind $itk_component(view) <Shift-KeyPress-Left> \
401	[itcl::code $this Pan set -2 0]
402	bind $itk_component(view) <Shift-KeyPress-Right> \
403	[itcl::code $this Pan set 2 0]
404	bind $itk_component(view) <Shift-KeyPress-Up> \
405	[itcl::code $this Pan set 0 -2]
406	bind $itk_component(view) <Shift-KeyPress-Down> \
407	[itcl::code $this Pan set 0 2]
408
409	# Bindings for zoom via keyboard
410	bind $itk_component(view) <KeyPress-Prior> \
411	[itcl::code $this Zoom out]
412	bind $itk_component(view) <KeyPress-Next> \
413	[itcl::code $this Zoom in]
414
415	bind $itk_component(view) <Enter> "focus $itk_component(view)"
416
417	if {[string equal "x11" [tk windowingsystem]]} {
418	# Bindings for zoom via mouse
419	bind $itk_component(view) <4> [itcl::code $this Zoom out]
420	bind $itk_component(view) <5> [itcl::code $this Zoom in]
421	}
422
423	set _image(download) [image create photo]
424
425	eval itk_initialize $args
426	Connect
427	update
428	}
429
430	# ----------------------------------------------------------------------
431	# DESTRUCTOR
432	# ----------------------------------------------------------------------
433	itcl::body Rappture::VtkVolumeViewer::destructor {} {
434	Disconnect
435	image delete $_image(plot)
436	image delete $_image(download)
437	catch { blt::arcball destroy $_arcball }
438	}
439
440	itcl::body Rappture::VtkVolumeViewer::DoResize {} {
441	if { $_width < 2 } {
442	set _width 500
443	}
444	if { $_height < 2 } {
445	set _height 500
446	}
447	set _start [clock clicks -milliseconds]
448	SendCmd "screen size $_width $_height"
449
450	set _legendPending 1
451	set _resizePending 0
452	}
453
454	itcl::body Rappture::VtkVolumeViewer::DoRotate {} {
455	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
456	SendCmd "camera orient $q"
457	set _rotatePending 0
458	}
459
460	itcl::body Rappture::VtkVolumeViewer::EventuallyResize { w h } {
461	set _width $w
462	set _height $h
463	$_arcball resize $w $h
464	if { !$_resizePending } {
465	set _resizePending 1
466	$_dispatcher event -after 400 !resize
467	}
468	}
469
470	itcl::body Rappture::VtkVolumeViewer::EventuallyReseed { numPoints } {
471	set _numSeeds $numPoints
472	if { !$_reseedPending } {
473	set _reseedPending 1
474	$_dispatcher event -after 600 !reseed
475	}
476	}
477
478	set rotate_delay 100
479
480	itcl::body Rappture::VtkVolumeViewer::EventuallyRotate { q } {
481	foreach { _view(qw) _view(qx) _view(qy) _view(qz) } $q break
482	if { !$_rotatePending } {
483	set _rotatePending 1
484	global rotate_delay
485	$_dispatcher event -after $rotate_delay !rotate
486	}
487	}
488
489	itcl::body Rappture::VtkVolumeViewer::EventuallySetCutplane { axis args } {
490	if { !$_cutplanePending } {
491	set _cutplanePending 1
492	$_dispatcher event -after 100 !${axis}cutplane
493	}
494	}
495
496	# ----------------------------------------------------------------------
497	# USAGE: add <dataobj> ?<settings>?
498	#
499	# Clients use this to add a data object to the plot. The optional
500	# <settings> are used to configure the plot. Allowed settings are
501	# -color, -brightness, -width, -linestyle, and -raise.
502	# ----------------------------------------------------------------------
503	itcl::body Rappture::VtkVolumeViewer::add {dataobj {settings ""}} {
504	array set params {
505	-color auto
506	-width 1
507	-linestyle solid
508	-brightness 0
509	-raise 0
510	-description ""
511	-param ""
512	-type ""
513	}
514	array set params $settings
515	set params(-description) ""
516	set params(-param) ""
517	array set params $settings
518
519	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
520	# can't handle -autocolors yet
521	set params(-color) black
522	}
523	set pos [lsearch -exact $_dlist $dataobj]
524	if {$pos < 0} {
525	lappend _dlist $dataobj
526	}
527	set _obj2ovride($dataobj-color) $params(-color)
528	set _obj2ovride($dataobj-width) $params(-width)
529	set _obj2ovride($dataobj-raise) $params(-raise)
530	$_dispatcher event -idle !rebuild
531	}
532
533
534	# ----------------------------------------------------------------------
535	# USAGE: delete ?<dataobj1> <dataobj2> ...?
536	#
537	# Clients use this to delete a dataobj from the plot. If no dataobjs
538	# are specified, then all dataobjs are deleted. No data objects are
539	# deleted. They are only removed from the display list.
540	#
541	# ----------------------------------------------------------------------
542	itcl::body Rappture::VtkVolumeViewer::delete {args} {
543	if { [llength $args] == 0} {
544	set args $_dlist
545	}
546	# Delete all specified dataobjs
547	set changed 0
548	foreach dataobj $args {
549	set pos [lsearch -exact $_dlist $dataobj]
550	if { $pos < 0 } {
551	continue; # Don't know anything about it.
552	}
553	# Remove it from the dataobj list.
554	set _dlist [lreplace $_dlist $pos $pos]
555	array unset _obj2ovride $dataobj-*
556	array unset _settings $dataobj-*
557	set changed 1
558	}
559	# If anything changed, then rebuild the plot
560	if { $changed } {
561	$_dispatcher event -idle !rebuild
562	}
563	}
564
565	# ----------------------------------------------------------------------
566	# USAGE: get ?-objects?
567	# USAGE: get ?-visible?
568	# USAGE: get ?-image view?
569	#
570	# Clients use this to query the list of objects being plotted, in
571	# order from bottom to top of this result. The optional "-image"
572	# flag can also request the internal images being shown.
573	# ----------------------------------------------------------------------
574	itcl::body Rappture::VtkVolumeViewer::get {args} {
575	if {[llength $args] == 0} {
576	set args "-objects"
577	}
578
579	set op [lindex $args 0]
580	switch -- $op {
581	"-objects" {
582	# put the dataobj list in order according to -raise options
583	set dlist {}
584	foreach dataobj $_dlist {
585	if { ![IsValidObject $dataobj] } {
586	continue
587	}
588	if {[info exists _obj2ovride($dataobj-raise)] &&
589	$_obj2ovride($dataobj-raise)} {
590	set dlist [linsert $dlist 0 $dataobj]
591	} else {
592	lappend dlist $dataobj
593	}
594	}
595	return $dlist
596	}
597	"-visible" {
598	set dlist {}
599	foreach dataobj $_dlist {
600	if { ![IsValidObject $dataobj] } {
601	continue
602	}
603	if { ![info exists _obj2ovride($dataobj-raise)] } {
604	# No setting indicates that the object isn't visible.
605	continue
606	}
607	# Otherwise use the -raise parameter to put the object to
608	# the front of the list.
609	if { $_obj2ovride($dataobj-raise) } {
610	set dlist [linsert $dlist 0 $dataobj]
611	} else {
612	lappend dlist $dataobj
613	}
614	}
615	return $dlist
616	}
617	-image {
618	if {[llength $args] != 2} {
619	error "wrong # args: should be \"get -image view\""
620	}
621	switch -- [lindex $args end] {
622	view {
623	return $_image(plot)
624	}
625	default {
626	error "bad image name \"[lindex $args end]\": should be view"
627	}
628	}
629	}
630	default {
631	error "bad option \"$op\": should be -objects or -image"
632	}
633	}
634	}
635
636	# ----------------------------------------------------------------------
637	# USAGE: scale ?<data1> <data2> ...?
638	#
639	# Sets the default limits for the overall plot according to the
640	# limits of the data for all of the given <data> objects. This
641	# accounts for all objects--even those not showing on the screen.
642	# Because of this, the limits are appropriate for all objects as
643	# the user scans through data in the ResultSet viewer.
644	# ----------------------------------------------------------------------
645	itcl::body Rappture::VtkVolumeViewer::scale {args} {
646	foreach dataobj $args {
647	foreach axis { x y z } {
648	set lim [$dataobj limits $axis]
649	if { ![info exists _limits($axis)] } {
650	set _limits($axis) $lim
651	continue
652	}
653	foreach {min max} $lim break
654	foreach {amin amax} $_limits($axis) break
655	if { $amin > $min } {
656	set amin $min
657	}
658	if { $amax < $max } {
659	set amax $max
660	}
661	set _limits($axis) [list $amin $amax]
662	}
663	foreach { fname lim } [$dataobj fieldlimits] {
664	if { ![info exists _limits($fname)] } {
665	set _limits($fname) $lim
666	continue
667	}
668	foreach {min max} $lim break
669	foreach {fmin fmax} $_limits($fname) break
670	if { $fmin > $min } {
671	set fmin $min
672	}
673	if { $fmax < $max } {
674	set fmax $max
675	}
676	set _limits($fname) [list $fmin $fmax]
677	}
678	}
679	}
680
681	# ----------------------------------------------------------------------
682	# USAGE: download coming
683	# USAGE: download controls <downloadCommand>
684	# USAGE: download now
685	#
686	# Clients use this method to create a downloadable representation
687	# of the plot. Returns a list of the form {ext string}, where
688	# "ext" is the file extension (indicating the type of data) and
689	# "string" is the data itself.
690	# ----------------------------------------------------------------------
691	itcl::body Rappture::VtkVolumeViewer::download {option args} {
692	switch $option {
693	coming {
694	if {[catch {
695	blt::winop snap $itk_component(plotarea) $_image(download)
696	}]} {
697	$_image(download) configure -width 1 -height 1
698	$_image(download) put #000000
699	}
700	}
701	controls {
702	set popup .vtkviewerdownload
703	if { ![winfo exists .vtkviewerdownload] } {
704	set inner [BuildDownloadPopup $popup [lindex $args 0]]
705	} else {
706	set inner [$popup component inner]
707	}
708	set _downloadPopup(image_controls) $inner.image_frame
709	set num [llength [get]]
710	set num [expr {($num == 1) ? "1 result" : "$num results"}]
711	set word [Rappture::filexfer::label downloadWord]
712	$inner.summary configure -text "$word $num in the following format:"
713	update idletasks ;# Fix initial sizes
714	return $popup
715	}
716	now {
717	set popup .vtkviewerdownload
718	if {[winfo exists .vtkviewerdownload]} {
719	$popup deactivate
720	}
721	switch -- $_downloadPopup(format) {
722	"image" {
723	return [$this GetImage [lindex $args 0]]
724	}
725	"vtk" {
726	return [$this GetVtkData [lindex $args 0]]
727	}
728	}
729	return ""
730	}
731	default {
732	error "bad option \"$option\": should be coming, controls, now"
733	}
734	}
735	}
736
737	# ----------------------------------------------------------------------
738	# USAGE: Connect ?<host:port>,<host:port>...?
739	#
740	# Clients use this method to establish a connection to a new
741	# server, or to reestablish a connection to the previous server.
742	# Any existing connection is automatically closed.
743	# ----------------------------------------------------------------------
744	itcl::body Rappture::VtkVolumeViewer::Connect {} {
745	set _hosts [GetServerList "vtkvis"]
746	if { "" == $_hosts } {
747	return 0
748	}
749	set result [VisViewer::Connect $_hosts]
750	if { $result } {
751	if { $_reportClientInfo } {
752	# Tell the server the viewer, hub, user and session.
753	# Do this immediately on connect before buffing any commands
754	global env
755
756	set info {}
757	set user "???"
758	if { [info exists env(USER)] } {
759	set user $env(USER)
760	}
761	set session "???"
762	if { [info exists env(SESSION)] } {
763	set session $env(SESSION)
764	}
765	lappend info "hub" [exec hostname]
766	lappend info "client" "vtkvolumeviewer"
767	lappend info "user" $user
768	lappend info "session" $session
769	SendCmd "clientinfo [list $info]"
770	}
771
772	set w [winfo width $itk_component(view)]
773	set h [winfo height $itk_component(view)]
774	EventuallyResize $w $h
775	}
776	return $result
777	}
778
779	#
780	# isconnected --
781	#
782	# Indicates if we are currently connected to the visualization server.
783	#
784	itcl::body Rappture::VtkVolumeViewer::isconnected {} {
785	return [VisViewer::IsConnected]
786	}
787
788	#
789	# disconnect --
790	#
791	itcl::body Rappture::VtkVolumeViewer::disconnect {} {
792	Disconnect
793	set _reset 1
794	}
795
796	#
797	# Disconnect --
798	#
799	# Clients use this method to disconnect from the current rendering
800	# server.
801	#
802	itcl::body Rappture::VtkVolumeViewer::Disconnect {} {
803	VisViewer::Disconnect
804
805	$_dispatcher cancel !rebuild
806	$_dispatcher cancel !resize
807	$_dispatcher cancel !reseed
808	$_dispatcher cancel !rotate
809	$_dispatcher cancel !xcutplane
810	$_dispatcher cancel !ycutplane
811	$_dispatcher cancel !zcutplane
812	$_dispatcher cancel !legend
813	# disconnected -- no more data sitting on server
814	set _outbuf ""
815	array unset _datasets
816	array unset _data
817	array unset _colormaps
818	array unset _seeds
819	array unset _dataset2style
820	array unset _obj2datasets
821	}
822
823	# ----------------------------------------------------------------------
824	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
825	#
826	# Invoked automatically whenever the "image" command comes in from
827	# the rendering server. Indicates that binary image data with the
828	# specified <size> will follow.
829	# ----------------------------------------------------------------------
830	itcl::body Rappture::VtkVolumeViewer::ReceiveImage { args } {
831	array set info {
832	-token "???"
833	-bytes 0
834	-type image
835	}
836	array set info $args
837	set bytes [ReceiveBytes $info(-bytes)]
838	StopWaiting
839	if { $info(-type) == "image" } {
840	if 0 {
841	set f [open "last.ppm" "w"]
842	puts $f $bytes
843	close $f
844	}
845	$_image(plot) configure -data $bytes
846	set time [clock seconds]
847	set date [clock format $time]
848	#puts stderr "$date: received image [image width $_image(plot)]x[image height $_image(plot)] image>"
849	if { $_start > 0 } {
850	set finish [clock clicks -milliseconds]
851	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
852	set _start 0
853	}
854	} elseif { $info(type) == "print" } {
855	set tag $this-print-$info(-token)
856	set _hardcopy($tag) $bytes
857	}
858	if { $_legendPending } {
859	RequestLegend
860	}
861	}
862
863	#
864	# ReceiveDataset --
865	#
866	itcl::body Rappture::VtkVolumeViewer::ReceiveDataset { args } {
867	if { ![isconnected] } {
868	return
869	}
870	set option [lindex $args 0]
871	switch -- $option {
872	"scalar" {
873	set option [lindex $args 1]
874	switch -- $option {
875	"world" {
876	foreach { x y z value tag } [lrange $args 2 end] break
877	}
878	"pixel" {
879	foreach { x y value tag } [lrange $args 2 end] break
880	}
881	}
882	}
883	"vector" {
884	set option [lindex $args 1]
885	switch -- $option {
886	"world" {
887	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
888	}
889	"pixel" {
890	foreach { x y vx vy vz tag } [lrange $args 2 end] break
891	}
892	}
893	}
894	"names" {
895	foreach { name } [lindex $args 1] {
896	#puts stderr "Dataset: $name"
897	}
898	}
899	default {
900	error "unknown dataset option \"$option\" from server"
901	}
902	}
903	}
904
905	# ----------------------------------------------------------------------
906	# USAGE: Rebuild
907	#
908	# Called automatically whenever something changes that affects the
909	# data in the widget. Clears any existing data and rebuilds the
910	# widget to display new data.
911	# ----------------------------------------------------------------------
912	itcl::body Rappture::VtkVolumeViewer::Rebuild {} {
913	update
914	set w [winfo width $itk_component(view)]
915	set h [winfo height $itk_component(view)]
916	if { $w < 2 \|\| $h < 2 } {
917	$_dispatcher event -idle !rebuild
918	return
919	}
920
921	# Turn on buffering of commands to the server. We don't want to
922	# be preempted by a server disconnect/reconnect (which automatically
923	# generates a new call to Rebuild).
924	StartBufferingCommands
925
926	set _legendPending 1
927
928	if { $_reset } {
929	set _width $w
930	set _height $h
931	$_arcball resize $w $h
932	DoResize
933	#
934	# Reset the camera and other view parameters
935	#
936	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
937	$_arcball quaternion $q
938	if {$_view(ortho)} {
939	SendCmd "camera mode ortho"
940	} else {
941	SendCmd "camera mode persp"
942	}
943	DoRotate
944	InitSettings axis-xgrid axis-ygrid axis-zgrid axisFlyMode \
945	axesVisible axisLabels
946	PanCamera
947	}
948	set _first ""
949
950	SendCmd "imgflush"
951	set _first ""
952
953	SendCmd "dataset visible 0"
954	foreach dataobj [get -objects] {
955	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
956	set _first $dataobj
957	}
958	set _obj2datasets($dataobj) ""
959	foreach comp [$dataobj components] {
960	set tag $dataobj-$comp
961	if { ![info exists _datasets($tag)] } {
962	set bytes [$dataobj vtkdata $comp]
963	set length [string length $bytes]
964	if { $_reportClientInfo } {
965	set info {}
966	lappend info "tool_id" [$dataobj hints toolId]
967	lappend info "tool_name" [$dataobj hints toolName]
968	lappend info "tool_version" [$dataobj hints toolRevision]
969	lappend info "tool_title" [$dataobj hints toolTitle]
970	lappend info "dataset_label" [$dataobj hints label]
971	lappend info "dataset_size" $length
972	lappend info "dataset_tag" $tag
973	SendCmd [list "clientinfo" $info]
974	}
975	append _outbuf "dataset add $tag data follows $length\n"
976	append _outbuf $bytes
977	set _datasets($tag) 1
978	SetObjectStyle $dataobj $comp
979	}
980	lappend _obj2datasets($dataobj) $tag
981	if { [info exists _obj2ovride($dataobj-raise)] } {
982	SendCmd "dataset visible 1 $tag"
983	}
984	break
985	}
986	}
987	if {"" != $_first} {
988	set location [$_first hints camera]
989	if { $location != "" } {
990	array set view $location
991	}
992
993	foreach axis { x y z } {
994	set label [$_first hints ${axis}label]
995	if { $label != "" } {
996	SendCmd "axis name $axis $label"
997	}
998	set units [$_first hints ${axis}units]
999	if { $units != "" } {
1000	SendCmd "axis units $axis $units"
1001	}
1002	}
1003	$itk_component(field) choices delete 0 end
1004	$itk_component(fieldmenu) delete 0 end
1005	array unset _fields
1006	set _curFldName ""
1007	foreach cname [$_first components] {
1008	foreach fname [$_first fieldnames $cname] {
1009	if { [info exists _fields($fname)] } {
1010	continue
1011	}
1012	foreach { label units components } \
1013	[$_first fieldinfo $fname] break
1014	# Only scalar fields are valid
1015	if {$components == 1} {
1016	$itk_component(field) choices insert end "$fname" "$label"
1017	$itk_component(fieldmenu) add radiobutton -label "$label" \
1018	-value $label -variable [itcl::scope _curFldLabel] \
1019	-selectcolor red \
1020	-activebackground $itk_option(-plotbackground) \
1021	-activeforeground $itk_option(-plotforeground) \
1022	-font "Arial 8" \
1023	-command [itcl::code $this Combo invoke]
1024	set _fields($fname) [list $label $units $components]
1025	if { $_curFldName == "" } {
1026	set _curFldName $fname
1027	set _curFldLabel $label
1028	}
1029	}
1030	}
1031	}
1032	$itk_component(field) value $_curFldLabel
1033	}
1034
1035	InitSettings volume-palette volume-material volume-quality volumeVisible \
1036	cutplaneVisible \
1037	cutplane-xposition cutplane-yposition cutplane-zposition \
1038	cutplane-xvisible cutplane-yvisible cutplane-zvisible
1039
1040	if { $_reset } {
1041	InitSettings volumeLighting
1042	Zoom reset
1043	set _reset 0
1044	}
1045	# Actually write the commands to the server socket. If it fails, we don't
1046	# care. We're finished here.
1047	blt::busy hold $itk_component(hull)
1048	StopBufferingCommands
1049	blt::busy release $itk_component(hull)
1050	}
1051
1052	# ----------------------------------------------------------------------
1053	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1054	#
1055	# Returns a list of server IDs for the current datasets being displayed. This
1056	# is normally a single ID, but it might be a list of IDs if the current data
1057	# object has multiple components.
1058	# ----------------------------------------------------------------------
1059	itcl::body Rappture::VtkVolumeViewer::CurrentDatasets {args} {
1060	set flag [lindex $args 0]
1061	switch -- $flag {
1062	"-all" {
1063	if { [llength $args] > 1 } {
1064	error "CurrentDatasets: can't specify dataobj after \"-all\""
1065	}
1066	set dlist [get -objects]
1067	}
1068	"-visible" {
1069	if { [llength $args] > 1 } {
1070	set dlist {}
1071	set args [lrange $args 1 end]
1072	foreach dataobj $args {
1073	if { [info exists _obj2ovride($dataobj-raise)] } {
1074	lappend dlist $dataobj
1075	}
1076	}
1077	} else {
1078	set dlist [get -visible]
1079	}
1080	}
1081	default {
1082	set dlist $args
1083	}
1084	}
1085	set rlist ""
1086	foreach dataobj $dlist {
1087	foreach comp [$dataobj components] {
1088	set tag $dataobj-$comp
1089	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1090	lappend rlist $tag
1091	}
1092	}
1093	}
1094	return $rlist
1095	}
1096
1097	# ----------------------------------------------------------------------
1098	# USAGE: Zoom in
1099	# USAGE: Zoom out
1100	# USAGE: Zoom reset
1101	#
1102	# Called automatically when the user clicks on one of the zoom
1103	# controls for this widget. Changes the zoom for the current view.
1104	# ----------------------------------------------------------------------
1105	itcl::body Rappture::VtkVolumeViewer::Zoom {option} {
1106	switch -- $option {
1107	"in" {
1108	set _view(zoom) [expr {$_view(zoom)*1.25}]
1109	SendCmd "camera zoom $_view(zoom)"
1110	}
1111	"out" {
1112	set _view(zoom) [expr {$_view(zoom)*0.8}]
1113	SendCmd "camera zoom $_view(zoom)"
1114	}
1115	"reset" {
1116	array set _view {
1117	qw 0.853553
1118	qx -0.353553
1119	qy 0.353553
1120	qz 0.146447
1121	zoom 1.0
1122	xpan 0
1123	ypan 0
1124	}
1125	if { $_first != "" } {
1126	set location [$_first hints camera]
1127	if { $location != "" } {
1128	array set _view $location
1129	}
1130	}
1131	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1132	$_arcball quaternion $q
1133	DoRotate
1134	SendCmd "camera reset"
1135	}
1136	}
1137	}
1138
1139	itcl::body Rappture::VtkVolumeViewer::PanCamera {} {
1140	set x $_view(xpan)
1141	set y $_view(ypan)
1142	SendCmd "camera pan $x $y"
1143	}
1144
1145
1146	# ----------------------------------------------------------------------
1147	# USAGE: Rotate click <x> <y>
1148	# USAGE: Rotate drag <x> <y>
1149	# USAGE: Rotate release <x> <y>
1150	#
1151	# Called automatically when the user clicks/drags/releases in the
1152	# plot area. Moves the plot according to the user's actions.
1153	# ----------------------------------------------------------------------
1154	itcl::body Rappture::VtkVolumeViewer::Rotate {option x y} {
1155	switch -- $option {
1156	"click" {
1157	$itk_component(view) configure -cursor fleur
1158	set _click(x) $x
1159	set _click(y) $y
1160	}
1161	"drag" {
1162	if {[array size _click] == 0} {
1163	Rotate click $x $y
1164	} else {
1165	set w [winfo width $itk_component(view)]
1166	set h [winfo height $itk_component(view)]
1167	if {$w <= 0 \|\| $h <= 0} {
1168	return
1169	}
1170
1171	if {[catch {
1172	# this fails sometimes for no apparent reason
1173	set dx [expr {double($x-$_click(x))/$w}]
1174	set dy [expr {double($y-$_click(y))/$h}]
1175	}]} {
1176	return
1177	}
1178	if { $dx == 0 && $dy == 0 } {
1179	return
1180	}
1181	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1182	EventuallyRotate $q
1183	set _click(x) $x
1184	set _click(y) $y
1185	}
1186	}
1187	"release" {
1188	Rotate drag $x $y
1189	$itk_component(view) configure -cursor ""
1190	catch {unset _click}
1191	}
1192	default {
1193	error "bad option \"$option\": should be click, drag, release"
1194	}
1195	}
1196	}
1197
1198	itcl::body Rappture::VtkVolumeViewer::Pick {x y} {
1199	foreach tag [CurrentDatasets -visible] {
1200	SendCmd "dataset getscalar pixel $x $y $tag"
1201	}
1202	}
1203
1204	# ----------------------------------------------------------------------
1205	# USAGE: $this Pan click x y
1206	# $this Pan drag x y
1207	# $this Pan release x y
1208	#
1209	# Called automatically when the user clicks on one of the zoom
1210	# controls for this widget. Changes the zoom for the current view.
1211	# ----------------------------------------------------------------------
1212	itcl::body Rappture::VtkVolumeViewer::Pan {option x y} {
1213	switch -- $option {
1214	"set" {
1215	set w [winfo width $itk_component(view)]
1216	set h [winfo height $itk_component(view)]
1217	set x [expr $x / double($w)]
1218	set y [expr $y / double($h)]
1219	set _view(xpan) [expr $_view(xpan) + $x]
1220	set _view(ypan) [expr $_view(ypan) + $y]
1221	PanCamera
1222	return
1223	}
1224	"click" {
1225	set _click(x) $x
1226	set _click(y) $y
1227	$itk_component(view) configure -cursor hand1
1228	}
1229	"drag" {
1230	if { ![info exists _click(x)] } {
1231	set _click(x) $x
1232	}
1233	if { ![info exists _click(y)] } {
1234	set _click(y) $y
1235	}
1236	set w [winfo width $itk_component(view)]
1237	set h [winfo height $itk_component(view)]
1238	set dx [expr ($_click(x) - $x)/double($w)]
1239	set dy [expr ($_click(y) - $y)/double($h)]
1240	set _click(x) $x
1241	set _click(y) $y
1242	set _view(xpan) [expr $_view(xpan) - $dx]
1243	set _view(ypan) [expr $_view(ypan) - $dy]
1244	PanCamera
1245	}
1246	"release" {
1247	Pan drag $x $y
1248	$itk_component(view) configure -cursor ""
1249	}
1250	default {
1251	error "unknown option \"$option\": should set, click, drag, or release"
1252	}
1253	}
1254	}
1255
1256	# ----------------------------------------------------------------------
1257	# USAGE: InitSettings <what> ?<value>?
1258	#
1259	# Used internally to update rendering settings whenever parameters
1260	# change in the popup settings panel. Sends the new settings off
1261	# to the back end.
1262	# ----------------------------------------------------------------------
1263	itcl::body Rappture::VtkVolumeViewer::InitSettings { args } {
1264	foreach spec $args {
1265	if { [info exists _settings($_first-$spec)] } {
1266	# Reset global setting with dataobj specific setting
1267	set _settings($spec) $_settings($_first-$spec)
1268	}
1269	AdjustSetting $spec
1270	}
1271	}
1272
1273	#
1274	# AdjustSetting --
1275	#
1276	# Changes/updates a specific setting in the widget. There are
1277	# usually user-setable option. Commands are sent to the render
1278	# server.
1279	#
1280	itcl::body Rappture::VtkVolumeViewer::AdjustSetting {what {value ""}} {
1281	if { ![isconnected] } {
1282	return
1283	}
1284	switch -- $what {
1285	"volumeVisible" {
1286	set bool $_settings(volumeVisible)
1287	foreach dataset [CurrentDatasets -visible] {
1288	SendCmd "volume visible $bool $dataset"
1289	}
1290	if { $bool } {
1291	Rappture::Tooltip::for $itk_component(volume) \
1292	"Hide the volume"
1293	} else {
1294	Rappture::Tooltip::for $itk_component(volume) \
1295	"Show the volume"
1296	}
1297	}
1298	"volume-material" {
1299	set val $_settings(volume-material)
1300	set diffuse [expr {0.01*$val}]
1301	set specular [expr {0.01*$val}]
1302	#set power [expr {sqrt(160*$val+1.0)}]
1303	set power [expr {$val+1.0}]
1304	foreach dataset [CurrentDatasets -visible] {
1305	SendCmd "volume shading diffuse $diffuse $dataset"
1306	SendCmd "volume shading specular $specular $power $dataset"
1307	}
1308	}
1309	"volumeLighting" {
1310	set bool $_settings(volumeLighting)
1311	foreach dataset [CurrentDatasets -visible] {
1312	SendCmd "volume lighting $bool $dataset"
1313	}
1314	}
1315	"volume-quality" {
1316	set val $_settings(volume-quality)
1317	set val [expr {0.01*$val}]
1318	foreach dataset [CurrentDatasets -visible] {
1319	SendCmd "volume quality $val $dataset"
1320	}
1321	}
1322	"axesVisible" {
1323	set bool $_settings(axesVisible)
1324	SendCmd "axis visible all $bool"
1325	}
1326	"axisLabels" {
1327	set bool $_settings(axisLabels)
1328	SendCmd "axis labels all $bool"
1329	}
1330	"axis-xgrid" - "axis-ygrid" - "axis-zgrid" {
1331	set axis [string range $what 5 5]
1332	set bool $_settings($what)
1333	SendCmd "axis grid $axis $bool"
1334	}
1335	"axisFlyMode" {
1336	set mode [$itk_component(axismode) value]
1337	set mode [$itk_component(axismode) translate $mode]
1338	set _settings($what) $mode
1339	SendCmd "axis flymode $mode"
1340	}
1341	"cutplaneEdges" {
1342	set bool $_settings($what)
1343	foreach dataset [CurrentDatasets -visible] {
1344	SendCmd "cutplane edges $bool $dataset"
1345	}
1346	}
1347	"cutplaneVisible" {
1348	set bool $_settings($what)
1349	foreach dataset [CurrentDatasets -visible] {
1350	SendCmd "cutplane visible $bool $dataset"
1351	}
1352	}
1353	"cutplaneWireframe" {
1354	set bool $_settings($what)
1355	foreach dataset [CurrentDatasets -visible] {
1356	SendCmd "cutplane wireframe $bool $dataset"
1357	}
1358	}
1359	"cutplaneLighting" {
1360	set bool $_settings($what)
1361	foreach dataset [CurrentDatasets -visible] {
1362	SendCmd "cutplane lighting $bool $dataset"
1363	}
1364	}
1365	"cutplane-opacity" {
1366	set val $_settings($what)
1367	set sval [expr { 0.01 * double($val) }]
1368	foreach dataset [CurrentDatasets -visible] {
1369	SendCmd "cutplane opacity $sval $dataset"
1370	}
1371	}
1372	"cutplane-xvisible" - "cutplane-yvisible" - "cutplane-zvisible" {
1373	set axis [string range $what 9 9]
1374	set bool $_settings($what)
1375	if { $bool } {
1376	$itk_component(${axis}CutScale) configure -state normal \
1377	-troughcolor white
1378	} else {
1379	$itk_component(${axis}CutScale) configure -state disabled \
1380	-troughcolor grey82
1381	}
1382	foreach dataset [CurrentDatasets -visible] {
1383	SendCmd "cutplane axis $axis $bool $dataset"
1384	}
1385	}
1386	"cutplane-xposition" - "cutplane-yposition" - "cutplane-zposition" {
1387	set axis [string range $what 9 9]
1388	set pos [expr $_settings($what) * 0.01]
1389	foreach dataset [CurrentDatasets -visible] {
1390	SendCmd "cutplane slice ${axis} ${pos} $dataset"
1391	}
1392	set _cutplanePending 0
1393	}
1394	"volume-palette" {
1395	set palette [$itk_component(palette) value]
1396	set _settings(volume-palette) $palette
1397	foreach dataset [CurrentDatasets -visible $_first] {
1398	foreach {dataobj comp} [split $dataset -] break
1399	ChangeColormap $dataobj $comp $palette
1400	}
1401	set _legendPending 1
1402	}
1403	"volume-palette" {
1404	set palette [$itk_component(palette) value]
1405	set _settings(volume-palette) $palette
1406	foreach dataset [CurrentDatasets -visible $_first] {
1407	foreach {dataobj comp} [split $dataset -] break
1408	ChangeColormap $dataobj $comp $palette
1409	}
1410	set _legendPending 1
1411	}
1412	"field" {
1413	set label [$itk_component(field) value]
1414	set fname [$itk_component(field) translate $label]
1415	set _settings(field) $fname
1416	if { [info exists _fields($fname)] } {
1417	foreach { label units components } $_fields($fname) break
1418	if { $components > 1 } {
1419	puts stderr "Can't use a vector field in a volume"
1420	return
1421	} else {
1422	set _colorMode scalar
1423	}
1424	set _curFldName $fname
1425	set _curFldLabel $label
1426	} else {
1427	puts stderr "unknown field \"$fname\""
1428	return
1429	}
1430	foreach dataset [CurrentDatasets -visible $_first] {
1431	#SendCmd "volume colormode $_colorMode ${fname} $dataset"
1432	SendCmd "cutplane colormode $_colorMode ${fname} $dataset"
1433	}
1434	SendCmd "camera reset"
1435	DrawLegend
1436	}
1437	default {
1438	error "don't know how to fix $what"
1439	}
1440	}
1441	}
1442
1443	#
1444	# RequestLegend --
1445	#
1446	# Request a new legend from the server. The size of the legend
1447	# is determined from the height of the canvas. It will be rotated
1448	# to be vertical when drawn.
1449	#
1450	itcl::body Rappture::VtkVolumeViewer::RequestLegend {} {
1451	set font "Arial 8"
1452	set lineht [font metrics $font -linespace]
1453	set c $itk_component(legend)
1454	set w 12
1455	set h [expr {$_height - 3 * ($lineht + 2)}]
1456	if { $h < 1} {
1457	return
1458	}
1459	# Set the legend on the first volume dataset.
1460	foreach dataset [CurrentDatasets -visible $_first] {
1461	foreach {dataobj comp} [split $dataset -] break
1462	if { [info exists _dataset2style($dataset)] } {
1463	SendCmdNoWait \
1464	"legend $_dataset2style($dataset) $_colorMode $_curFldName {} $w $h 0"
1465	break;
1466	}
1467	}
1468	}
1469
1470	#
1471	# ChangeColormap --
1472	#
1473	itcl::body Rappture::VtkVolumeViewer::ChangeColormap {dataobj comp color} {
1474	set tag $dataobj-$comp
1475	if { ![info exist _style($tag)] } {
1476	error "no initial colormap"
1477	}
1478	array set style $_style($tag)
1479	set style(-color) $color
1480	set _style($tag) [array get style]
1481	SetColormap $dataobj $comp
1482	}
1483
1484	#
1485	# SetColormap --
1486	#
1487	itcl::body Rappture::VtkVolumeViewer::SetColormap { dataobj comp } {
1488	array set style {
1489	-color BCGYR
1490	-levels 6
1491	-opacity 1.0
1492	}
1493	set tag $dataobj-$comp
1494	if { ![info exists _initialStyle($tag)] } {
1495	# Save the initial component style.
1496	set _initialStyle($tag) [$dataobj style $comp]
1497	}
1498
1499	# Override defaults with initial style defined in xml.
1500	array set style $_initialStyle($tag)
1501
1502	if { ![info exists _style($tag)] } {
1503	set _style($tag) [array get style]
1504	}
1505	# Override initial style with current style.
1506	array set style $_style($tag)
1507
1508	set name "$style(-color):$style(-levels):$style(-opacity)"
1509	if { ![info exists _colormaps($name)] } {
1510	BuildColormap $name [array get style]
1511	set _colormaps($name) 1
1512	}
1513	if { ![info exists _dataset2style($tag)] \|\|
1514	$_dataset2style($tag) != $name } {
1515	SendCmd "volume colormap $name $tag"
1516	SendCmd "cutplane colormap $name-opaque $tag"
1517	set _dataset2style($tag) $name
1518	}
1519	}
1520
1521	#
1522	# BuildColormap --
1523	#
1524	itcl::body Rappture::VtkVolumeViewer::BuildColormap { name styles } {
1525	array set style $styles
1526	set cmap [ColorsToColormap $style(-color)]
1527	if { [llength $cmap] == 0 } {
1528	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
1529	}
1530	if { ![info exists _settings(volume-opacity)] } {
1531	set _settings(volume-opacity) $style(-opacity)
1532	}
1533	set max $_settings(volume-opacity)
1534
1535	set opaqueWmap "0.0 1.0 1.0 1.0"
1536	#set wmap "0.0 0.0 0.1 0.0 0.2 0.8 0.98 0.8 0.99 0.0 1.0 0.0"
1537	# Approximate cubic opacity curve
1538	set wmap "0.0 0.0 0.1 0.001 0.2 0.008 0.3 0.027 0.4 0.064 0.5 0.125 0.6 0.216 0.7 0.343 0.8 0.512 0.9 0.729 1.0 1.0"
1539	SendCmd "colormap add $name { $cmap } { $wmap }"
1540	SendCmd "colormap add $name-opaque { $cmap } { $opaqueWmap }"
1541	}
1542
1543	# ----------------------------------------------------------------------
1544	# CONFIGURATION OPTION: -plotbackground
1545	# ----------------------------------------------------------------------
1546	itcl::configbody Rappture::VtkVolumeViewer::plotbackground {
1547	if { [isconnected] } {
1548	foreach {r g b} [Color2RGB $itk_option(-plotbackground)] break
1549	SendCmd "screen bgcolor $r $g $b"
1550	}
1551	}
1552
1553	# ----------------------------------------------------------------------
1554	# CONFIGURATION OPTION: -plotforeground
1555	# ----------------------------------------------------------------------
1556	itcl::configbody Rappture::VtkVolumeViewer::plotforeground {
1557	if { [isconnected] } {
1558	foreach {r g b} [Color2RGB $itk_option(-plotforeground)] break
1559	#fix this!
1560	#SendCmd "color background $r $g $b"
1561	}
1562	}
1563
1564	itcl::body Rappture::VtkVolumeViewer::BuildVolumeTab {} {
1565
1566	set fg [option get $itk_component(hull) font Font]
1567	#set bfg [option get $itk_component(hull) boldFont Font]
1568
1569	set inner [$itk_component(main) insert end \
1570	-title "Volume Settings" \
1571	-icon [Rappture::icon volume-on]]
1572	$inner configure -borderwidth 4
1573
1574	checkbutton $inner.volume \
1575	-text "Show Volume" \
1576	-variable [itcl::scope _settings(volumeVisible)] \
1577	-command [itcl::code $this AdjustSetting volumeVisible] \
1578	-font "Arial 9"
1579
1580	checkbutton $inner.lighting \
1581	-text "Enable Lighting" \
1582	-variable [itcl::scope _settings(volumeLighting)] \
1583	-command [itcl::code $this AdjustSetting volumeLighting] \
1584	-font "Arial 9"
1585
1586	label $inner.dim_l -text "Dim" -font "Arial 9"
1587	::scale $inner.material -from 0 -to 100 -orient horizontal \
1588	-variable [itcl::scope _settings(volume-material)] \
1589	-width 10 \
1590	-showvalue off -command [itcl::code $this AdjustSetting volume-material]
1591	label $inner.bright_l -text "Bright" -font "Arial 9"
1592
1593	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1594	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1595	-variable [itcl::scope _settings(volume-opacity)] \
1596	-width 10 \
1597	-showvalue off \
1598	-command [itcl::code $this AdjustSetting volume-opacity]
1599
1600	label $inner.quality_l -text "Quality" -font "Arial 9"
1601	::scale $inner.quality -from 0 -to 100 -orient horizontal \
1602	-variable [itcl::scope _settings(volume-quality)] \
1603	-width 10 \
1604	-showvalue off -command [itcl::code $this AdjustSetting volume-quality]
1605
1606	itk_component add field_l {
1607	label $inner.field_l -text "Field" -font "Arial 9"
1608	} {
1609	ignore -font
1610	}
1611	itk_component add field {
1612	Rappture::Combobox $inner.field -width 10 -editable no
1613	}
1614	bind $inner.field <<Value>> \
1615	[itcl::code $this AdjustSetting field]
1616
1617	label $inner.palette_l -text "Palette" -font "Arial 9"
1618	itk_component add palette {
1619	Rappture::Combobox $inner.palette -width 10 -editable no
1620	}
1621	$inner.palette choices insert end \
1622	"BCGYR" "BCGYR" \
1623	"BGYOR" "BGYOR" \
1624	"blue" "blue" \
1625	"blue-to-brown" "blue-to-brown" \
1626	"blue-to-orange" "blue-to-orange" \
1627	"blue-to-grey" "blue-to-grey" \
1628	"green-to-magenta" "green-to-magenta" \
1629	"greyscale" "greyscale" \
1630	"nanohub" "nanohub" \
1631	"rainbow" "rainbow" \
1632	"spectral" "spectral" \
1633	"ROYGB" "ROYGB" \
1634	"RYGCB" "RYGCB" \
1635	"brown-to-blue" "brown-to-blue" \
1636	"grey-to-blue" "grey-to-blue" \
1637	"orange-to-blue" "orange-to-blue"
1638
1639	$itk_component(palette) value "BCGYR"
1640	bind $inner.palette <<Value>> \
1641	[itcl::code $this AdjustSetting volume-palette]
1642
1643	blt::table $inner \
1644	0,0 $inner.field_l -anchor w -pady 2 \
1645	0,1 $inner.field -anchor w -pady 2 -cspan 2 \
1646	1,0 $inner.volume -anchor w -pady 2 -cspan 4 \
1647	2,0 $inner.lighting -anchor w -pady 2 -cspan 4 \
1648	3,0 $inner.dim_l -anchor e -pady 2 \
1649	3,1 $inner.material -fill x -pady 2 \
1650	3,2 $inner.bright_l -anchor w -pady 2 \
1651	4,0 $inner.quality_l -anchor w -pady 2 -cspan 2 \
1652	5,0 $inner.quality -fill x -pady 2 -cspan 2 \
1653	7,0 $inner.palette_l -anchor w -pady 2 \
1654	7,1 $inner.palette -anchor w -pady 2 -cspan 2 \
1655
1656	blt::table configure $inner r* c* -resize none
1657	blt::table configure $inner r8 -resize expand
1658	}
1659
1660	itcl::body Rappture::VtkVolumeViewer::BuildAxisTab {} {
1661
1662	set fg [option get $itk_component(hull) font Font]
1663	#set bfg [option get $itk_component(hull) boldFont Font]
1664
1665	set inner [$itk_component(main) insert end \
1666	-title "Axis Settings" \
1667	-icon [Rappture::icon axis1]]
1668	$inner configure -borderwidth 4
1669
1670	checkbutton $inner.visible \
1671	-text "Show Axes" \
1672	-variable [itcl::scope _settings(axesVisible)] \
1673	-command [itcl::code $this AdjustSetting axesVisible] \
1674	-font "Arial 9"
1675
1676	checkbutton $inner.labels \
1677	-text "Show Axis Labels" \
1678	-variable [itcl::scope _settings(axisLabels)] \
1679	-command [itcl::code $this AdjustSetting axisLabels] \
1680	-font "Arial 9"
1681
1682	checkbutton $inner.gridx \
1683	-text "Show X Grid" \
1684	-variable [itcl::scope _settings(axis-xgrid)] \
1685	-command [itcl::code $this AdjustSetting axis-xgrid] \
1686	-font "Arial 9"
1687	checkbutton $inner.gridy \
1688	-text "Show Y Grid" \
1689	-variable [itcl::scope _settings(axis-ygrid)] \
1690	-command [itcl::code $this AdjustSetting axis-ygrid] \
1691	-font "Arial 9"
1692	checkbutton $inner.gridz \
1693	-text "Show Z Grid" \
1694	-variable [itcl::scope _settings(axis-zgrid)] \
1695	-command [itcl::code $this AdjustSetting axis-zgrid] \
1696	-font "Arial 9"
1697
1698	label $inner.mode_l -text "Mode" -font "Arial 9"
1699
1700	itk_component add axismode {
1701	Rappture::Combobox $inner.mode -width 10 -editable no
1702	}
1703	$inner.mode choices insert end \
1704	"static_triad" "static" \
1705	"closest_triad" "closest" \
1706	"furthest_triad" "furthest" \
1707	"outer_edges" "outer"
1708	$itk_component(axismode) value "static"
1709	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting axisFlyMode]
1710
1711	blt::table $inner \
1712	0,0 $inner.visible -anchor w -cspan 2 \
1713	1,0 $inner.labels -anchor w -cspan 2 \
1714	2,0 $inner.gridx -anchor w -cspan 2 \
1715	3,0 $inner.gridy -anchor w -cspan 2 \
1716	4,0 $inner.gridz -anchor w -cspan 2 \
1717	5,0 $inner.mode_l -anchor w -cspan 2 -padx { 2 0 } \
1718	6,0 $inner.mode -fill x -cspan 2
1719
1720	blt::table configure $inner r* c* -resize none
1721	blt::table configure $inner r7 c1 -resize expand
1722	}
1723
1724
1725	itcl::body Rappture::VtkVolumeViewer::BuildCameraTab {} {
1726	set inner [$itk_component(main) insert end \
1727	-title "Camera Settings" \
1728	-icon [Rappture::icon camera]]
1729	$inner configure -borderwidth 4
1730
1731	set labels { qx qy qz qw xpan ypan zoom }
1732	set row 0
1733	foreach tag $labels {
1734	label $inner.${tag}label -text $tag -font "Arial 9"
1735	entry $inner.${tag} -font "Arial 9" -bg white \
1736	-textvariable [itcl::scope _view($tag)]
1737	bind $inner.${tag} <KeyPress-Return> \
1738	[itcl::code $this camera set ${tag}]
1739	blt::table $inner \
1740	$row,0 $inner.${tag}label -anchor e -pady 2 \
1741	$row,1 $inner.${tag} -anchor w -pady 2
1742	blt::table configure $inner r$row -resize none
1743	incr row
1744	}
1745	checkbutton $inner.ortho \
1746	-text "Orthographic Projection" \
1747	-variable [itcl::scope _view(ortho)] \
1748	-command [itcl::code $this camera set ortho] \
1749	-font "Arial 9"
1750	blt::table $inner \
1751	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1752	blt::table configure $inner r$row -resize none
1753	incr row
1754
1755	blt::table configure $inner c0 c1 -resize none
1756	blt::table configure $inner c2 -resize expand
1757	blt::table configure $inner r$row -resize expand
1758	}
1759
1760	itcl::body Rappture::VtkVolumeViewer::BuildCutplaneTab {} {
1761
1762	set fg [option get $itk_component(hull) font Font]
1763
1764	set inner [$itk_component(main) insert end \
1765	-title "Cutplane Settings" \
1766	-icon [Rappture::icon cutbutton]]
1767
1768	$inner configure -borderwidth 4
1769
1770	checkbutton $inner.visible \
1771	-text "Show Cutplanes" \
1772	-variable [itcl::scope _settings(cutplaneVisible)] \
1773	-command [itcl::code $this AdjustSetting cutplaneVisible] \
1774	-font "Arial 9"
1775
1776	checkbutton $inner.wireframe \
1777	-text "Show Wireframe" \
1778	-variable [itcl::scope _settings(cutplaneWireframe)] \
1779	-command [itcl::code $this AdjustSetting cutplaneWireframe] \
1780	-font "Arial 9"
1781
1782	checkbutton $inner.lighting \
1783	-text "Enable Lighting" \
1784	-variable [itcl::scope _settings(cutplaneLighting)] \
1785	-command [itcl::code $this AdjustSetting cutplaneLighting] \
1786	-font "Arial 9"
1787
1788	checkbutton $inner.edges \
1789	-text "Show Edges" \
1790	-variable [itcl::scope _settings(cutplaneEdges)] \
1791	-command [itcl::code $this AdjustSetting cutplaneEdges] \
1792	-font "Arial 9"
1793
1794	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1795	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1796	-variable [itcl::scope _settings(cutplane-opacity)] \
1797	-width 10 \
1798	-showvalue off \
1799	-command [itcl::code $this AdjustSetting cutplane-opacity]
1800	$inner.opacity set $_settings(cutplane-opacity)
1801
1802	# X-value slicer...
1803	itk_component add xCutButton {
1804	Rappture::PushButton $inner.xbutton \
1805	-onimage [Rappture::icon x-cutplane] \
1806	-offimage [Rappture::icon x-cutplane] \
1807	-command [itcl::code $this AdjustSetting cutplane-xvisible] \
1808	-variable [itcl::scope _settings(cutplane-xvisible)]
1809	}
1810	Rappture::Tooltip::for $itk_component(xCutButton) \
1811	"Toggle the X-axis cutplane on/off"
1812	$itk_component(xCutButton) select
1813
1814	itk_component add xCutScale {
1815	::scale $inner.xval -from 100 -to 0 \
1816	-width 10 -orient vertical -showvalue yes \
1817	-borderwidth 1 -highlightthickness 0 \
1818	-command [itcl::code $this EventuallySetCutplane x] \
1819	-variable [itcl::scope _settings(cutplane-xposition)]
1820	} {
1821	usual
1822	ignore -borderwidth -highlightthickness
1823	}
1824	# Set the default cutplane value before disabling the scale.
1825	$itk_component(xCutScale) set 50
1826	$itk_component(xCutScale) configure -state disabled
1827	Rappture::Tooltip::for $itk_component(xCutScale) \
1828	"@[itcl::code $this Slice tooltip x]"
1829
1830	# Y-value slicer...
1831	itk_component add yCutButton {
1832	Rappture::PushButton $inner.ybutton \
1833	-onimage [Rappture::icon y-cutplane] \
1834	-offimage [Rappture::icon y-cutplane] \
1835	-command [itcl::code $this AdjustSetting cutplane-yvisible] \
1836	-variable [itcl::scope _settings(cutplane-yvisible)]
1837	}
1838	Rappture::Tooltip::for $itk_component(yCutButton) \
1839	"Toggle the Y-axis cutplane on/off"
1840	$itk_component(yCutButton) select
1841
1842	itk_component add yCutScale {
1843	::scale $inner.yval -from 100 -to 0 \
1844	-width 10 -orient vertical -showvalue yes \
1845	-borderwidth 1 -highlightthickness 0 \
1846	-command [itcl::code $this EventuallySetCutplane y] \
1847	-variable [itcl::scope _settings(cutplane-yposition)]
1848	} {
1849	usual
1850	ignore -borderwidth -highlightthickness
1851	}
1852	Rappture::Tooltip::for $itk_component(yCutScale) \
1853	"@[itcl::code $this Slice tooltip y]"
1854	# Set the default cutplane value before disabling the scale.
1855	$itk_component(yCutScale) set 50
1856	$itk_component(yCutScale) configure -state disabled
1857
1858	# Z-value slicer...
1859	itk_component add zCutButton {
1860	Rappture::PushButton $inner.zbutton \
1861	-onimage [Rappture::icon z-cutplane] \
1862	-offimage [Rappture::icon z-cutplane] \
1863	-command [itcl::code $this AdjustSetting cutplane-zvisible] \
1864	-variable [itcl::scope _settings(cutplane-zvisible)]
1865	}
1866	Rappture::Tooltip::for $itk_component(zCutButton) \
1867	"Toggle the Z-axis cutplane on/off"
1868	$itk_component(zCutButton) select
1869
1870	itk_component add zCutScale {
1871	::scale $inner.zval -from 100 -to 0 \
1872	-width 10 -orient vertical -showvalue yes \
1873	-borderwidth 1 -highlightthickness 0 \
1874	-command [itcl::code $this EventuallySetCutplane z] \
1875	-variable [itcl::scope _settings(cutplane-zposition)]
1876	} {
1877	usual
1878	ignore -borderwidth -highlightthickness
1879	}
1880	$itk_component(zCutScale) set 50
1881	$itk_component(zCutScale) configure -state disabled
1882	Rappture::Tooltip::for $itk_component(zCutScale) \
1883	"@[itcl::code $this Slice tooltip z]"
1884
1885	blt::table $inner \
1886	0,0 $inner.visible -anchor w -pady 2 -cspan 4 \
1887	1,0 $inner.lighting -anchor w -pady 2 -cspan 4 \
1888	2,0 $inner.wireframe -anchor w -pady 2 -cspan 4 \
1889	3,0 $inner.edges -anchor w -pady 2 -cspan 4 \
1890	4,0 $inner.opacity_l -anchor w -pady 2 -cspan 3 \
1891	5,0 $inner.opacity -fill x -pady 2 -cspan 3 \
1892	6,0 $itk_component(xCutButton) -anchor e -padx 2 -pady 2 \
1893	7,0 $itk_component(xCutScale) -fill y \
1894	6,1 $itk_component(yCutButton) -anchor e -padx 2 -pady 2 \
1895	7,1 $itk_component(yCutScale) -fill y \
1896	6,2 $itk_component(zCutButton) -anchor e -padx 2 -pady 2 \
1897	7,2 $itk_component(zCutScale) -fill y \
1898
1899	blt::table configure $inner r* c* -resize none
1900	blt::table configure $inner r7 c3 -resize expand
1901	}
1902
1903	#
1904	# camera --
1905	#
1906	itcl::body Rappture::VtkVolumeViewer::camera {option args} {
1907	switch -- $option {
1908	"show" {
1909	puts [array get _view]
1910	}
1911	"set" {
1912	set who [lindex $args 0]
1913	set x $_view($who)
1914	set code [catch { string is double $x } result]
1915	if { $code != 0 \|\| !$result } {
1916	return
1917	}
1918	switch -- $who {
1919	"ortho" {
1920	if {$_view(ortho)} {
1921	SendCmd "camera mode ortho"
1922	} else {
1923	SendCmd "camera mode persp"
1924	}
1925	}
1926	"xpan" - "ypan" {
1927	PanCamera
1928	}
1929	"qx" - "qy" - "qz" - "qw" {
1930	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1931	$_arcball quaternion $q
1932	EventuallyRotate $q
1933	}
1934	"zoom" {
1935	SendCmd "camera zoom $_view(zoom)"
1936	}
1937	}
1938	}
1939	}
1940	}
1941
1942	itcl::body Rappture::VtkVolumeViewer::GetVtkData { args } {
1943	set bytes ""
1944	foreach dataobj [get] {
1945	foreach comp [$dataobj components] {
1946	set tag $dataobj-$comp
1947	set contents [$dataobj vtkdata $comp]
1948	append bytes "$contents\n"
1949	}
1950	}
1951	return [list .vtk $bytes]
1952	}
1953
1954	itcl::body Rappture::VtkVolumeViewer::GetImage { args } {
1955	if { [image width $_image(download)] > 0 &&
1956	[image height $_image(download)] > 0 } {
1957	set bytes [$_image(download) data -format "jpeg -quality 100"]
1958	set bytes [Rappture::encoding::decode -as b64 $bytes]
1959	return [list .jpg $bytes]
1960	}
1961	return ""
1962	}
1963
1964	itcl::body Rappture::VtkVolumeViewer::BuildDownloadPopup { popup command } {
1965	Rappture::Balloon $popup \
1966	-title "[Rappture::filexfer::label downloadWord] as..."
1967	set inner [$popup component inner]
1968	label $inner.summary -text "" -anchor w
1969	radiobutton $inner.vtk_button -text "VTK data file" \
1970	-variable [itcl::scope _downloadPopup(format)] \
1971	-font "Helvetica 9 " \
1972	-value vtk
1973	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
1974	radiobutton $inner.image_button -text "Image File" \
1975	-variable [itcl::scope _downloadPopup(format)] \
1976	-value image
1977	Rappture::Tooltip::for $inner.image_button \
1978	"Save as digital image."
1979
1980	button $inner.ok -text "Save" \
1981	-highlightthickness 0 -pady 2 -padx 3 \
1982	-command $command \
1983	-compound left \
1984	-image [Rappture::icon download]
1985
1986	button $inner.cancel -text "Cancel" \
1987	-highlightthickness 0 -pady 2 -padx 3 \
1988	-command [list $popup deactivate] \
1989	-compound left \
1990	-image [Rappture::icon cancel]
1991
1992	blt::table $inner \
1993	0,0 $inner.summary -cspan 2 \
1994	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
1995	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
1996	4,1 $inner.cancel -width .9i -fill y \
1997	4,0 $inner.ok -padx 2 -width .9i -fill y
1998	blt::table configure $inner r3 -height 4
1999	blt::table configure $inner r4 -pady 4
2000	raise $inner.image_button
2001	$inner.vtk_button invoke
2002	return $inner
2003	}
2004
2005	itcl::body Rappture::VtkVolumeViewer::SetObjectStyle { dataobj comp } {
2006	# Parse style string.
2007	set tag $dataobj-$comp
2008	set style [$dataobj style $comp]
2009	array set settings {
2010	-color \#808080
2011	-edges 0
2012	-edgecolor black
2013	-linewidth 1.0
2014	-opacity 0.4
2015	-wireframe 0
2016	-lighting 1
2017	-seeds 1
2018	-seedcolor white
2019	-visible 1
2020	}
2021	if { $dataobj != $_first } {
2022	set settings(-opacity) 1
2023	}
2024	array set settings $style
2025	SendCmd "volume add $tag"
2026	SendCmd "cutplane add $tag"
2027	SendCmd "cutplane visible 0 $tag"
2028
2029	SendCmd "volume lighting $settings(-lighting) $tag"
2030	set _settings(volumeLighting) $settings(-lighting)
2031	SetColormap $dataobj $comp
2032	}
2033
2034	itcl::body Rappture::VtkVolumeViewer::IsValidObject { dataobj } {
2035	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2036	return 0
2037	}
2038	return 1
2039	}
2040
2041	# ----------------------------------------------------------------------
2042	# USAGE: ReceiveLegend <colormap> <title> <vmin> <vmax> <size>
2043	#
2044	# Invoked automatically whenever the "legend" command comes in from
2045	# the rendering server. Indicates that binary image data with the
2046	# specified <size> will follow.
2047	# ----------------------------------------------------------------------
2048	itcl::body Rappture::VtkVolumeViewer::ReceiveLegend { colormap title vmin vmax size } {
2049	set _legendPending 0
2050	#puts stderr "ReceiveLegend colormap=$colormap title=$title range=$vmin,$vmax size=$size"
2051	if { [IsConnected] } {
2052	set bytes [ReceiveBytes $size]
2053	if { ![info exists _image(legend)] } {
2054	set _image(legend) [image create photo]
2055	}
2056	$_image(legend) configure -data $bytes
2057	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2058	if { [catch {DrawLegend} errs] != 0 } {
2059	puts stderr errs=$errs
2060	}
2061	}
2062	}
2063
2064	#
2065	# DrawLegend --
2066	#
2067	# Draws the legend in it's own canvas which resides to the right
2068	# of the contour plot area.
2069	#
2070	itcl::body Rappture::VtkVolumeViewer::DrawLegend { } {
2071	set fname $_curFldName
2072	set c $itk_component(view)
2073	set w [winfo width $c]
2074	set h [winfo height $c]
2075	set font "Arial 8"
2076	set lineht [font metrics $font -linespace]
2077
2078	if { [info exists _fields($fname)] } {
2079	foreach { title units } $_fields($fname) break
2080	if { $units != "" } {
2081	set title [format "%s (%s)" $title $units]
2082	}
2083	} else {
2084	set title $fname
2085	}
2086	if { $_settings(legendVisible) } {
2087	set x [expr $w - 2]
2088	if { [$c find withtag "legend"] == "" } {
2089	set y 2
2090	$c create text $x $y \
2091	-anchor ne \
2092	-fill $itk_option(-plotforeground) -tags "title legend" \
2093	-font $font
2094	incr y $lineht
2095	$c create text $x $y \
2096	-anchor ne \
2097	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2098	-font $font
2099	incr y $lineht
2100	$c create image $x $y \
2101	-anchor ne \
2102	-image $_image(legend) -tags "colormap legend"
2103	$c create text $x [expr {$h-2}] \
2104	-anchor se \
2105	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2106	-font $font
2107	#$c bind colormap <Enter> [itcl::code $this EnterLegend %x %y]
2108	$c bind colormap <Leave> [itcl::code $this LeaveLegend]
2109	$c bind colormap <Motion> [itcl::code $this MotionLegend %x %y]
2110	}
2111	$c bind title <ButtonPress> [itcl::code $this Combo post]
2112	$c bind title <Enter> [itcl::code $this Combo activate]
2113	$c bind title <Leave> [itcl::code $this Combo deactivate]
2114	# Reset the item coordinates according the current size of the plot.
2115	$c itemconfigure title -text $title
2116	if { [info exists _limits($_curFldName)] } {
2117	foreach { vmin vmax } $_limits($_curFldName) break
2118	$c itemconfigure vmin -text [format %g $vmin]
2119	$c itemconfigure vmax -text [format %g $vmax]
2120	}
2121	set y 2
2122	$c coords title $x $y
2123	incr y $lineht
2124	$c coords vmax $x $y
2125	incr y $lineht
2126	$c coords colormap $x $y
2127	$c coords vmin $x [expr {$h - 2}]
2128	}
2129	}
2130
2131	#
2132	# EnterLegend --
2133	#
2134	itcl::body Rappture::VtkVolumeViewer::EnterLegend { x y } {
2135	SetLegendTip $x $y
2136	}
2137
2138	#
2139	# MotionLegend --
2140	#
2141	itcl::body Rappture::VtkVolumeViewer::MotionLegend { x y } {
2142	Rappture::Tooltip::tooltip cancel
2143	set c $itk_component(view)
2144	SetLegendTip $x $y
2145	}
2146
2147	#
2148	# LeaveLegend --
2149	#
2150	itcl::body Rappture::VtkVolumeViewer::LeaveLegend { } {
2151	Rappture::Tooltip::tooltip cancel
2152	.rappturetooltip configure -icon ""
2153	}
2154
2155	#
2156	# SetLegendTip --
2157	#
2158	itcl::body Rappture::VtkVolumeViewer::SetLegendTip { x y } {
2159	set c $itk_component(view)
2160	set w [winfo width $c]
2161	set h [winfo height $c]
2162	set font "Arial 8"
2163	set lineht [font metrics $font -linespace]
2164
2165	set imgHeight [image height $_image(legend)]
2166	set coords [$c coords colormap]
2167	set imgX [expr $w - [image width $_image(legend)] - 2]
2168	set imgY [expr $y - 2 * ($lineht + 2)]
2169
2170	if { [info exists _fields($_title)] } {
2171	foreach { title units } $_fields($_title) break
2172	if { $units != "" } {
2173	set title [format "%s (%s)" $title $units]
2174	}
2175	} else {
2176	set title $_title
2177	}
2178	# Make a swatch of the selected color
2179	if { [catch { $_image(legend) get 10 $imgY } pixel] != 0 } {
2180	#puts stderr "out of range: $imgY"
2181	return
2182	}
2183	if { ![info exists _image(swatch)] } {
2184	set _image(swatch) [image create photo -width 24 -height 24]
2185	}
2186	set color [eval format "\#%02x%02x%02x" $pixel]
2187	$_image(swatch) put black -to 0 0 23 23
2188	$_image(swatch) put $color -to 1 1 22 22
2189	.rappturetooltip configure -icon $_image(swatch)
2190
2191	# Compute the value of the point
2192	if { [info exists _limits($_curFldName)] } {
2193	foreach { vmin vmax } $_limits($_curFldName) break
2194	set t [expr 1.0 - (double($imgY) / double($imgHeight-1))]
2195	set value [expr $t * ($vmax - $vmin) + $vmin]
2196	} else {
2197	set value 0.0
2198	}
2199	set tipx [expr $x + 15]
2200	set tipy [expr $y - 5]
2201	Rappture::Tooltip::text $c "$title $value"
2202	Rappture::Tooltip::tooltip show $c +$tipx,+$tipy
2203	}
2204
2205
2206	# ----------------------------------------------------------------------
2207	# USAGE: Slice move x\|y\|z <newval>
2208	#
2209	# Called automatically when the user drags the slider to move the
2210	# cut plane that slices 3D data. Gets the current value from the
2211	# slider and moves the cut plane to the appropriate point in the
2212	# data set.
2213	# ----------------------------------------------------------------------
2214	itcl::body Rappture::VtkVolumeViewer::Slice {option args} {
2215	switch -- $option {
2216	"move" {
2217	set axis [lindex $args 0]
2218	set newval [lindex $args 1]
2219	if {[llength $args] != 2} {
2220	error "wrong # args: should be \"Slice move x\|y\|z newval\""
2221	}
2222	set newpos [expr {0.01*$newval}]
2223	SendCmd "cutplane slice $axis $newpos"
2224	}
2225	"tooltip" {
2226	set axis [lindex $args 0]
2227	set val [$itk_component(${axis}CutScale) get]
2228	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
2229	}
2230	default {
2231	error "bad option \"$option\": should be axis, move, or tooltip"
2232	}
2233	}
2234	}
2235
2236
2237	# ----------------------------------------------------------------------
2238	# USAGE: _dropdown post
2239	# USAGE: _dropdown unpost
2240	# USAGE: _dropdown select
2241	#
2242	# Used internally to handle the dropdown list for this combobox. The
2243	# post/unpost options are invoked when the list is posted or unposted
2244	# to manage the relief of the controlling button. The select option
2245	# is invoked whenever there is a selection from the list, to assign
2246	# the value back to the gauge.
2247	# ----------------------------------------------------------------------
2248	itcl::body Rappture::VtkVolumeViewer::Combo {option} {
2249	set c $itk_component(view)
2250	switch -- $option {
2251	post {
2252	foreach { x1 y1 x2 y2 } [$c bbox title] break
2253	set x1 [expr [winfo width $itk_component(view)] - [winfo reqwidth $itk_component(fieldmenu)]]
2254	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2255	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2256	#puts stderr "combo x=$x y=$y"
2257	tk_popup $itk_component(fieldmenu) $x $y
2258	}
2259	activate {
2260	$c itemconfigure title -fill red
2261	}
2262	deactivate {
2263	$c itemconfigure title -fill white
2264	}
2265	invoke {
2266	$itk_component(field) value _curFldLabel
2267	AdjustSetting field
2268	}
2269	default {
2270	error "bad option \"$option\": should be post, unpost, select"
2271	}
2272	}
2273	}
2274

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