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source: trunk/gui/scripts/vtkstreamlinesviewer.tcl @ 2609

Last change on this file since 2609 was 2609, checked in by ldelgass, 13 years ago
Add back missing dataset tag name when setting streamlines lighting. Remove unused proc "name".
File size: 84.2 KB

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1
2	# ----------------------------------------------------------------------
3	# COMPONENT: vtkviewer - Vtk drawing object viewer
4	#
5	# It connects to the Vtk server running on a rendering farm,
6	# transmits data, and displays the results.
7	# ======================================================================
8	# AUTHOR: Michael McLennan, Purdue University
9	# Copyright (c) 2004-2005 Purdue Research Foundation
10	#
11	# See the file "license.terms" for information on usage and
12	# redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
13	# ======================================================================
14	package require Itk
15	package require BLT
16	#package require Img
17	package require vtk
18
19	option add *VtkStreamlinesViewer.width 4i widgetDefault
20	option add VtkStreamlinesViewercursor crosshair widgetDefault
21	option add *VtkStreamlinesViewer.height 4i widgetDefault
22	option add *VtkStreamlinesViewer.foreground black widgetDefault
23	option add *VtkStreamlinesViewer.controlBackground gray widgetDefault
24	option add *VtkStreamlinesViewer.controlDarkBackground #999999 widgetDefault
25	option add *VtkStreamlinesViewer.plotBackground black widgetDefault
26	option add *VtkStreamlinesViewer.plotForeground white widgetDefault
27	option add *VtkStreamlinesViewer.font \
28	--helvetica-medium-r-normal--12-* widgetDefault
29
30	# must use this name -- plugs into Rappture::resources::load
31	proc VtkStreamlinesViewer_init_resources {} {
32	Rappture::resources::register \
33	vtkvis_server Rappture::VtkStreamlinesViewer::SetServerList
34	}
35
36	itcl::class Rappture::VtkStreamlinesViewer {
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 limits { colormap }
61	public method sendto { string }
62	public method parameters {title args} {
63	# do nothing
64	}
65	public method scale {args}
66
67	protected method Connect {}
68	protected method CurrentDatasets {args}
69	protected method Disconnect {}
70	protected method DoResize {}
71	protected method DoReseed {}
72	protected method DoRotate {}
73	protected method AdjustSetting {what {value ""}}
74	protected method InitSettings { args }
75	protected method Pan {option x y}
76	protected method Pick {x y}
77	protected method Rebuild {}
78	protected method ReceiveDataset { args }
79	protected method ReceiveImage { args }
80	protected method ReceiveLegend { colormap title vmin vmax size }
81	protected method Rotate {option x y}
82	protected method SendCmd {string}
83	protected method Zoom {option}
84
85	# The following methods are only used by this class.
86	private method BuildAxisTab {}
87	private method BuildCameraTab {}
88	private method BuildColormap { name colors }
89	private method BuildCutplaneTab {}
90	private method BuildDownloadPopup { widget command }
91	private method BuildStreamsTab {}
92	private method BuildVolumeTab {}
93	private method ConvertToVtkData { dataobj comp }
94	private method DrawLegend { title }
95	private method EnterLegend { x y }
96	private method EventuallyResize { w h }
97	private method EventuallyReseed { numPoints }
98	private method EventuallyRotate { q }
99	private method EventuallySetCutplane { axis args }
100	private method GetImage { args }
101	private method GetVtkData { args }
102	private method IsValidObject { dataobj }
103	private method LeaveLegend {}
104	private method MotionLegend { x y }
105	private method PanCamera {}
106	private method RequestLegend {}
107	private method SetColormap { dataobj comp }
108	private method ChangeColormap { dataobj comp color }
109	private method ColorsToColormap { color }
110	private method SetLegendTip { x y }
111	private method SetObjectStyle { dataobj comp }
112	private method Slice {option args}
113
114	private variable _arcball ""
115	private variable _outbuf ; # buffer for outgoing commands
116
117	private variable _dlist "" ; # list of data objects
118	private variable _allDataObjs
119	private variable _obj2datasets
120	private variable _obj2ovride ; # maps dataobj => style override
121	private variable _datasets ; # contains all the dataobj-component
122	; # datasets in the server
123	private variable _colormaps ; # contains all the colormaps
124	; # in the server.
125	private variable _dataset2style ;# maps dataobj-component to transfunc
126
127	private variable _click ; # info used for rotate operations
128	private variable _limits ; # autoscale min/max for all axes
129	private variable _view ; # view params for 3D view
130	private variable _settings
131	private variable _style; # Array of current component styles.
132	private variable _initialStyle; # Array of initial component styles.
133	private variable _reset 1; # indicates if camera needs to be reset
134	# to starting position.
135
136	private variable _first "" ; # This is the topmost dataset.
137	private variable _start 0
138	private variable _buffering 0
139	private variable _title ""
140	private variable _seeds
141
142	common _downloadPopup; # download options from popup
143	private common _hardcopy
144	private variable _width 0
145	private variable _height 0
146	private variable _resizePending 0
147	private variable _reseedPending 0
148	private variable _rotatePending 0
149	private variable _cutplanePending 0
150	private variable _outline
151	private variable _vectorFields
152	private variable _scalarFields
153	private variable _fields
154	private variable _currentField
155	private variable _numSeeds 200
156	private variable _colorMode "vmag";# Mode of colormap (vmag or scalar)
157	}
158
159	itk::usual VtkStreamlinesViewer {
160	keep -background -foreground -cursor -font
161	keep -plotbackground -plotforeground
162	}
163
164	# ----------------------------------------------------------------------
165	# CONSTRUCTOR
166	# ----------------------------------------------------------------------
167	itcl::body Rappture::VtkStreamlinesViewer::constructor {hostlist args} {
168	# Rebuild event
169	$_dispatcher register !rebuild
170	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
171
172	# Resize event
173	$_dispatcher register !resize
174	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
175
176	# Reseed event
177	$_dispatcher register !reseed
178	$_dispatcher dispatch $this !reseed "[itcl::code $this DoReseed]; list"
179
180	# Rotate event
181	$_dispatcher register !rotate
182	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
183
184	# X-Cutplane event
185	$_dispatcher register !xcutplane
186	$_dispatcher dispatch $this !xcutplane \
187	"[itcl::code $this AdjustSetting cutplane-xposition]; list"
188
189	# Y-Cutplane event
190	$_dispatcher register !ycutplane
191	$_dispatcher dispatch $this !ycutplane \
192	"[itcl::code $this AdjustSetting cutplane-yposition]; list"
193
194	# Z-Cutplane event
195	$_dispatcher register !zcutplane
196	$_dispatcher dispatch $this !zcutplane \
197	"[itcl::code $this AdjustSetting cutplane-zposition]; list"
198
199	#
200	# Populate parser with commands handle incoming requests
201	#
202	$_parser alias image [itcl::code $this ReceiveImage]
203	$_parser alias dataset [itcl::code $this ReceiveDataset]
204	$_parser alias legend [itcl::code $this ReceiveLegend]
205
206	array set _outline {
207	id -1
208	afterId -1
209	x1 -1
210	y1 -1
211	x2 -1
212	y2 -1
213	}
214	# Initialize the view to some default parameters.
215	array set _view {
216	qw 1
217	qx 0
218	qy 0
219	qz 0
220	zoom 1.0
221	xpan 0
222	ypan 0
223	ortho 0
224	}
225	set _arcball [blt::arcball create 100 100]
226	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
227	$_arcball quaternion $q
228
229	set _limits(zmin) 0.0
230	set _limits(zmax) 1.0
231
232	array set _settings [subst {
233	axis-xgrid 0
234	axis-ygrid 0
235	axis-zgrid 0
236	axis-xcutplane 0
237	axis-ycutplane 0
238	axis-zcutplane 0
239	axis-xposition 0
240	axis-yposition 0
241	axis-zposition 0
242	axis-visible 1
243	axis-labels 1
244	cutplane-edges 0
245	cutplane-xvisible 0
246	cutplane-yvisible 0
247	cutplane-zvisible 0
248	cutplane-xposition 50
249	cutplane-yposition 50
250	cutplane-zposition 50
251	cutplane-visible 1
252	cutplane-wireframe 0
253	cutplane-opacity 100
254	volume-edges 0
255	volume-lighting 1
256	volume-opacity 40
257	volume-visible 1
258	volume-wireframe 0
259	streamlines-seeds 0
260	streamlines-visible 1
261	streamlines-opacity 100
262	streamlines-numpoints 200
263	streamlines-lighting 1
264	streamlines-scale 1
265	legend-visible 1
266	}]
267
268	itk_component add view {
269	canvas $itk_component(plotarea).view \
270	-highlightthickness 0 -borderwidth 0
271	} {
272	usual
273	ignore -highlightthickness -borderwidth -background
274	}
275
276	set c $itk_component(view)
277	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
278	bind $c <4> [itcl::code $this Zoom in 0.25]
279	bind $c <5> [itcl::code $this Zoom out 0.25]
280	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
281	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
282	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
283	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
284	bind $c <Enter> "focus %W"
285
286	# Fix the scrollregion in case we go off screen
287	$c configure -scrollregion [$c bbox all]
288
289	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
290	set _map(cwidth) -1
291	set _map(cheight) -1
292	set _map(zoom) 1.0
293	set _map(original) ""
294
295	set f [$itk_component(main) component controls]
296	itk_component add reset {
297	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
298	-highlightthickness 0 \
299	-image [Rappture::icon reset-view] \
300	-command [itcl::code $this Zoom reset]
301	} {
302	usual
303	ignore -highlightthickness
304	}
305	pack $itk_component(reset) -side top -padx 2 -pady 2
306	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
307
308	itk_component add zoomin {
309	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
310	-highlightthickness 0 \
311	-image [Rappture::icon zoom-in] \
312	-command [itcl::code $this Zoom in]
313	} {
314	usual
315	ignore -highlightthickness
316	}
317	pack $itk_component(zoomin) -side top -padx 2 -pady 2
318	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
319
320	itk_component add zoomout {
321	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
322	-highlightthickness 0 \
323	-image [Rappture::icon zoom-out] \
324	-command [itcl::code $this Zoom out]
325	} {
326	usual
327	ignore -highlightthickness
328	}
329	pack $itk_component(zoomout) -side top -padx 2 -pady 2
330	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
331
332	itk_component add volume {
333	Rappture::PushButton $f.volume \
334	-onimage [Rappture::icon volume-on] \
335	-offimage [Rappture::icon volume-off] \
336	-variable [itcl::scope _settings(volume-visible)] \
337	-command [itcl::code $this AdjustSetting volume-visible]
338	}
339	$itk_component(volume) select
340	Rappture::Tooltip::for $itk_component(volume) \
341	"Don't display the volume"
342	pack $itk_component(volume) -padx 2 -pady 2
343
344	itk_component add streamlines {
345	Rappture::PushButton $f.streamlines \
346	-onimage [Rappture::icon streamlines-on] \
347	-offimage [Rappture::icon streamlines-off] \
348	-variable [itcl::scope _settings(streamlines-visible)] \
349	-command [itcl::code $this AdjustSetting streamlines-visible] \
350	}
351	$itk_component(streamlines) select
352	Rappture::Tooltip::for $itk_component(streamlines) \
353	"Toggle the streamlines on/off"
354	pack $itk_component(streamlines) -padx 2 -pady 2
355
356	if { [catch {
357	BuildVolumeTab
358	BuildStreamsTab
359	BuildCutplaneTab
360	BuildAxisTab
361	BuildCameraTab
362	} errs] != 0 } {
363	puts stderr errs=$errs
364	}
365	# Legend
366
367	set _image(legend) [image create photo]
368	itk_component add legend {
369	canvas $itk_component(plotarea).legend -width 50 -highlightthickness 0
370	} {
371	usual
372	ignore -highlightthickness
373	rename -background -plotbackground plotBackground Background
374	}
375
376	# Hack around the Tk panewindow. The problem is that the requested
377	# size of the 3d view isn't set until an image is retrieved from
378	# the server. So the panewindow uses the tiny size.
379	set w 10000
380	pack forget $itk_component(view)
381	blt::table $itk_component(plotarea) \
382	0,0 $itk_component(view) -fill both -reqwidth $w
383	blt::table configure $itk_component(plotarea) c1 -resize none
384
385	# Bindings for rotation via mouse
386	bind $itk_component(view) <ButtonPress-1> \
387	[itcl::code $this Rotate click %x %y]
388	bind $itk_component(view) <B1-Motion> \
389	[itcl::code $this Rotate drag %x %y]
390	bind $itk_component(view) <ButtonRelease-1> \
391	[itcl::code $this Rotate release %x %y]
392	bind $itk_component(view) <Configure> \
393	[itcl::code $this EventuallyResize %w %h]
394
395	if 0 {
396	bind $itk_component(view) <Configure> \
397	[itcl::code $this EventuallyResize %w %h]
398	}
399	# Bindings for panning via mouse
400	bind $itk_component(view) <ButtonPress-2> \
401	[itcl::code $this Pan click %x %y]
402	bind $itk_component(view) <B2-Motion> \
403	[itcl::code $this Pan drag %x %y]
404	bind $itk_component(view) <ButtonRelease-2> \
405	[itcl::code $this Pan release %x %y]
406
407	bind $itk_component(view) <ButtonRelease-3> \
408	[itcl::code $this Pick %x %y]
409
410	# Bindings for panning via keyboard
411	bind $itk_component(view) <KeyPress-Left> \
412	[itcl::code $this Pan set -10 0]
413	bind $itk_component(view) <KeyPress-Right> \
414	[itcl::code $this Pan set 10 0]
415	bind $itk_component(view) <KeyPress-Up> \
416	[itcl::code $this Pan set 0 -10]
417	bind $itk_component(view) <KeyPress-Down> \
418	[itcl::code $this Pan set 0 10]
419	bind $itk_component(view) <Shift-KeyPress-Left> \
420	[itcl::code $this Pan set -2 0]
421	bind $itk_component(view) <Shift-KeyPress-Right> \
422	[itcl::code $this Pan set 2 0]
423	bind $itk_component(view) <Shift-KeyPress-Up> \
424	[itcl::code $this Pan set 0 -2]
425	bind $itk_component(view) <Shift-KeyPress-Down> \
426	[itcl::code $this Pan set 0 2]
427
428	# Bindings for zoom via keyboard
429	bind $itk_component(view) <KeyPress-Prior> \
430	[itcl::code $this Zoom out]
431	bind $itk_component(view) <KeyPress-Next> \
432	[itcl::code $this Zoom in]
433
434	bind $itk_component(view) <Enter> "focus $itk_component(view)"
435
436	if {[string equal "x11" [tk windowingsystem]]} {
437	# Bindings for zoom via mouse
438	bind $itk_component(view) <4> [itcl::code $this Zoom out]
439	bind $itk_component(view) <5> [itcl::code $this Zoom in]
440	}
441
442	set _image(download) [image create photo]
443
444	eval itk_initialize $args
445	Connect
446	update
447	}
448
449	# ----------------------------------------------------------------------
450	# DESTRUCTOR
451	# ----------------------------------------------------------------------
452	itcl::body Rappture::VtkStreamlinesViewer::destructor {} {
453	Disconnect
454	$_dispatcher cancel !rebuild
455	$_dispatcher cancel !resize
456	$_dispatcher cancel !reseed
457	$_dispatcher cancel !rotate
458	$_dispatcher cancel !xcutplane
459	$_dispatcher cancel !ycutplane
460	$_dispatcher cancel !zcutplane
461	image delete $_image(plot)
462	image delete $_image(download)
463	catch { blt::arcball destroy $_arcball }
464	}
465
466	itcl::body Rappture::VtkStreamlinesViewer::DoResize {} {
467	if { $_width < 2 } {
468	set _width 500
469	}
470	if { $_height < 2 } {
471	set _height 500
472	}
473	set _start [clock clicks -milliseconds]
474	SendCmd "screen size $_width $_height"
475	RequestLegend
476
477	#SendCmd "imgflush"
478
479	# Must reset camera to have object scaling to take effect.
480	#SendCmd "camera reset"
481	#SendCmd "camera zoom $_view(zoom)"
482	set _resizePending 0
483	}
484
485	itcl::body Rappture::VtkStreamlinesViewer::DoRotate {} {
486	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
487	SendCmd "camera orient $q"
488	set _rotatePending 0
489	}
490
491	itcl::body Rappture::VtkStreamlinesViewer::DoReseed {} {
492	foreach dataset [CurrentDatasets -visible] {
493	foreach {dataobj comp} [split $dataset -] break
494	# This command works for either random or fmesh seeds
495	SendCmd "streamlines seed numpts $_numSeeds $dataset"
496	}
497	set _reseedPending 0
498	}
499
500	itcl::body Rappture::VtkStreamlinesViewer::EventuallyResize { w h } {
501	set _width $w
502	set _height $h
503	$_arcball resize $w $h
504	if { !$_resizePending } {
505	set _resizePending 1
506	$_dispatcher event -after 400 !resize
507	}
508	}
509
510	itcl::body Rappture::VtkStreamlinesViewer::EventuallyReseed { numPoints } {
511	set _numSeeds $numPoints
512	if { !$_reseedPending } {
513	set _reseedPending 1
514	$_dispatcher event -after 600 !reseed
515	}
516	}
517
518	set rotate_delay 100
519
520	itcl::body Rappture::VtkStreamlinesViewer::EventuallyRotate { q } {
521	foreach { _view(qw) _view(qx) _view(qy) _view(qz) } $q break
522	if { !$_rotatePending } {
523	set _rotatePending 1
524	global rotate_delay
525	$_dispatcher event -after $rotate_delay !rotate
526	}
527	}
528
529	itcl::body Rappture::VtkStreamlinesViewer::EventuallySetCutplane { axis args } {
530	if { !$_cutplanePending } {
531	set _cutplanePending 1
532	$_dispatcher event -after 100 !${axis}cutplane
533	}
534	}
535
536	# ----------------------------------------------------------------------
537	# USAGE: add <dataobj> ?<settings>?
538	#
539	# Clients use this to add a data object to the plot. The optional
540	# <settings> are used to configure the plot. Allowed settings are
541	# -color, -brightness, -width, -linestyle, and -raise.
542	# ----------------------------------------------------------------------
543	itcl::body Rappture::VtkStreamlinesViewer::add {dataobj {settings ""}} {
544	array set params {
545	-color auto
546	-width 1
547	-linestyle solid
548	-brightness 0
549	-raise 0
550	-description ""
551	-param ""
552	-type ""
553	}
554	array set params $settings
555	set params(-description) ""
556	set params(-param) ""
557	foreach {opt val} $settings {
558	if {![info exists params($opt)]} {
559	error "bad setting \"$opt\": should be [join [lsort [array names params]] {, }]"
560	}
561	set params($opt) $val
562	}
563	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
564	# can't handle -autocolors yet
565	set params(-color) black
566	}
567	set pos [lsearch -exact $dataobj $_dlist]
568	if {$pos < 0} {
569	lappend _dlist $dataobj
570	}
571	set _allDataObjs($dataobj) 1
572	set _obj2ovride($dataobj-color) $params(-color)
573	set _obj2ovride($dataobj-width) $params(-width)
574	set _obj2ovride($dataobj-raise) $params(-raise)
575	$_dispatcher event -idle !rebuild
576	}
577
578
579	# ----------------------------------------------------------------------
580	# USAGE: delete ?<dataobj1> <dataobj2> ...?
581	#
582	# Clients use this to delete a dataobj from the plot. If no dataobjs
583	# are specified, then all dataobjs are deleted. No data objects are
584	# deleted. They are only removed from the display list.
585	#
586	# ----------------------------------------------------------------------
587	itcl::body Rappture::VtkStreamlinesViewer::delete {args} {
588	if { [llength $args] == 0} {
589	set args $_dlist
590	}
591	# Delete all specified dataobjs
592	set changed 0
593	foreach dataobj $args {
594	set pos [lsearch -exact $_dlist $dataobj]
595	if { $pos < 0 } {
596	continue; # Don't know anything about it.
597	}
598	# Remove it from the dataobj list.
599	set _dlist [lreplace $_dlist $pos $pos]
600	foreach comp [$dataobj components] {
601	SendCmd "dataset visible 0 $dataobj-$comp"
602	}
603	array unset _obj2ovride $dataobj-*
604	array unset _settings $dataobj-*
605	# Append to the end of the dataobj list.
606	lappend _dlist $dataobj
607	set changed 1
608	}
609	# If anything changed, then rebuild the plot
610	if { $changed } {
611	$_dispatcher event -idle !rebuild
612	}
613	}
614
615	# ----------------------------------------------------------------------
616	# USAGE: get ?-objects?
617	# USAGE: get ?-visible?
618	# USAGE: get ?-image view?
619	#
620	# Clients use this to query the list of objects being plotted, in
621	# order from bottom to top of this result. The optional "-image"
622	# flag can also request the internal images being shown.
623	# ----------------------------------------------------------------------
624	itcl::body Rappture::VtkStreamlinesViewer::get {args} {
625	if {[llength $args] == 0} {
626	set args "-objects"
627	}
628
629	set op [lindex $args 0]
630	switch -- $op {
631	"-objects" {
632	# put the dataobj list in order according to -raise options
633	set dlist {}
634	foreach dataobj $_dlist {
635	if { ![IsValidObject $dataobj] } {
636	continue
637	}
638	if {[info exists _obj2ovride($dataobj-raise)] &&
639	$_obj2ovride($dataobj-raise)} {
640	set dlist [linsert $dlist 0 $dataobj]
641	} else {
642	lappend dlist $dataobj
643	}
644	}
645	return $dlist
646	}
647	"-visible" {
648	set dlist {}
649	foreach dataobj $_dlist {
650	if { ![IsValidObject $dataobj] } {
651	continue
652	}
653	if { ![info exists _obj2ovride($dataobj-raise)] } {
654	# No setting indicates that the object isn't visible.
655	continue
656	}
657	# Otherwise use the -raise parameter to put the object to
658	# the front of the list.
659	if { $_obj2ovride($dataobj-raise) } {
660	set dlist [linsert $dlist 0 $dataobj]
661	} else {
662	lappend dlist $dataobj
663	}
664	}
665	return $dlist
666	}
667	-image {
668	if {[llength $args] != 2} {
669	error "wrong # args: should be \"get -image view\""
670	}
671	switch -- [lindex $args end] {
672	view {
673	return $_image(plot)
674	}
675	default {
676	error "bad image name \"[lindex $args end]\": should be view"
677	}
678	}
679	}
680	default {
681	error "bad option \"$op\": should be -objects or -image"
682	}
683	}
684	}
685
686	# ----------------------------------------------------------------------
687	# USAGE: scale ?<data1> <data2> ...?
688	#
689	# Sets the default limits for the overall plot according to the
690	# limits of the data for all of the given <data> objects. This
691	# accounts for all objects--even those not showing on the screen.
692	# Because of this, the limits are appropriate for all objects as
693	# the user scans through data in the ResultSet viewer.
694	# ----------------------------------------------------------------------
695	itcl::body Rappture::VtkStreamlinesViewer::scale {args} {
696	array unset _limits
697	foreach dataobj $args {
698	set string [limits $dataobj]
699	if { $string == "" } {
700	continue
701	}
702	array set bounds $string
703	if {![info exists _limits(xmin)] \|\| $_limits(xmin) > $bounds(xmin)} {
704	set _limits(xmin) $bounds(xmin)
705	}
706	if {![info exists _limits(xmax)] \|\| $_limits(xmax) < $bounds(xmax)} {
707	set _limits(xmax) $bounds(xmax)
708	}
709
710	if {![info exists _limits(ymin)] \|\| $_limits(ymin) > $bounds(ymin)} {
711	set _limits(ymin) $bounds(ymin)
712	}
713	if {![info exists _limits(ymax)] \|\| $_limits(ymax) < $bounds(ymax)} {
714	set _limits(ymax) $bounds(ymax)
715	}
716
717	if {![info exists _limits(zmin)] \|\| $_limits(zmin) > $bounds(zmin)} {
718	set _limits(zmin) $bounds(zmin)
719	}
720	if {![info exists _limits(zmax)] \|\| $_limits(zmax) < $bounds(zmax)} {
721	set _limits(zmax) $bounds(zmax)
722	}
723	}
724	}
725
726	# ----------------------------------------------------------------------
727	# USAGE: download coming
728	# USAGE: download controls <downloadCommand>
729	# USAGE: download now
730	#
731	# Clients use this method to create a downloadable representation
732	# of the plot. Returns a list of the form {ext string}, where
733	# "ext" is the file extension (indicating the type of data) and
734	# "string" is the data itself.
735	# ----------------------------------------------------------------------
736	itcl::body Rappture::VtkStreamlinesViewer::download {option args} {
737	switch $option {
738	coming {
739	if {[catch {
740	blt::winop snap $itk_component(plotarea) $_image(download)
741	}]} {
742	$_image(download) configure -width 1 -height 1
743	$_image(download) put #000000
744	}
745	}
746	controls {
747	set popup .vtkviewerdownload
748	if { ![winfo exists .vtkviewerdownload] } {
749	set inner [BuildDownloadPopup $popup [lindex $args 0]]
750	} else {
751	set inner [$popup component inner]
752	}
753	set _downloadPopup(image_controls) $inner.image_frame
754	set num [llength [get]]
755	set num [expr {($num == 1) ? "1 result" : "$num results"}]
756	set word [Rappture::filexfer::label downloadWord]
757	$inner.summary configure -text "$word $num in the following format:"
758	update idletasks ;# Fix initial sizes
759	return $popup
760	}
761	now {
762	set popup .vtkviewerdownload
763	if {[winfo exists .vtkviewerdownload]} {
764	$popup deactivate
765	}
766	switch -- $_downloadPopup(format) {
767	"image" {
768	return [$this GetImage [lindex $args 0]]
769	}
770	"vtk" {
771	return [$this GetVtkData [lindex $args 0]]
772	}
773	}
774	return ""
775	}
776	default {
777	error "bad option \"$option\": should be coming, controls, now"
778	}
779	}
780	}
781
782	# ----------------------------------------------------------------------
783	# USAGE: Connect ?<host:port>,<host:port>...?
784	#
785	# Clients use this method to establish a connection to a new
786	# server, or to reestablish a connection to the previous server.
787	# Any existing connection is automatically closed.
788	# ----------------------------------------------------------------------
789	itcl::body Rappture::VtkStreamlinesViewer::Connect {} {
790	set _hosts [GetServerList "vtkvis"]
791	if { "" == $_hosts } {
792	return 0
793	}
794	set result [VisViewer::Connect $_hosts]
795	if { $result } {
796	set w [winfo width $itk_component(view)]
797	set h [winfo height $itk_component(view)]
798	EventuallyResize $w $h
799	}
800	return $result
801	}
802
803	#
804	# isconnected --
805	#
806	# Indicates if we are currently connected to the visualization server.
807	#
808	itcl::body Rappture::VtkStreamlinesViewer::isconnected {} {
809	return [VisViewer::IsConnected]
810	}
811
812	#
813	# disconnect --
814	#
815	itcl::body Rappture::VtkStreamlinesViewer::disconnect {} {
816	Disconnect
817	set _reset 1
818	}
819
820	#
821	# Disconnect --
822	#
823	# Clients use this method to disconnect from the current rendering
824	# server.
825	#
826	itcl::body Rappture::VtkStreamlinesViewer::Disconnect {} {
827	VisViewer::Disconnect
828
829	# disconnected -- no more data sitting on server
830	set _outbuf ""
831	array unset _datasets
832	array unset _data
833	array unset _colormaps
834	}
835
836	#
837	# sendto --
838	#
839	itcl::body Rappture::VtkStreamlinesViewer::sendto { bytes } {
840	SendBytes "$bytes\n"
841	}
842
843	#
844	# SendCmd
845	#
846	# Send commands off to the rendering server. If we're currently
847	# sending data objects to the server, buffer the commands to be
848	# sent later.
849	#
850	itcl::body Rappture::VtkStreamlinesViewer::SendCmd {string} {
851	if { $_buffering } {
852	append _outbuf $string "\n"
853	} else {
854	SendBytes "$string\n"
855	}
856	}
857
858	# ----------------------------------------------------------------------
859	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
860	#
861	# Invoked automatically whenever the "image" command comes in from
862	# the rendering server. Indicates that binary image data with the
863	# specified <size> will follow.
864	# ----------------------------------------------------------------------
865	itcl::body Rappture::VtkStreamlinesViewer::ReceiveImage { args } {
866	array set info {
867	-token "???"
868	-bytes 0
869	-type image
870	}
871	array set info $args
872	set bytes [ReceiveBytes $info(-bytes)]
873	if { $info(-type) == "image" } {
874	if 0 {
875	set f [open "last.ppm" "w"]
876	puts $f $bytes
877	close $f
878	}
879	$_image(plot) configure -data $bytes
880	set time [clock seconds]
881	set date [clock format $time]
882	#puts stderr "$date: received image [image width $_image(plot)]x[image height $_image(plot)] image>"
883	if { $_start > 0 } {
884	set finish [clock clicks -milliseconds]
885	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
886	set _start 0
887	}
888	} elseif { $info(type) == "print" } {
889	set tag $this-print-$info(-token)
890	set _hardcopy($tag) $bytes
891	}
892	}
893
894	#
895	# ReceiveDataset --
896	#
897	itcl::body Rappture::VtkStreamlinesViewer::ReceiveDataset { args } {
898	if { ![isconnected] } {
899	return
900	}
901	set option [lindex $args 0]
902	switch -- $option {
903	"scalar" {
904	set option [lindex $args 1]
905	switch -- $option {
906	"world" {
907	foreach { x y z value tag } [lrange $args 2 end] break
908	}
909	"pixel" {
910	foreach { x y value tag } [lrange $args 2 end] break
911	}
912	}
913	}
914	"vector" {
915	set option [lindex $args 1]
916	switch -- $option {
917	"world" {
918	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
919	}
920	"pixel" {
921	foreach { x y vx vy vz tag } [lrange $args 2 end] break
922	}
923	}
924	}
925	"names" {
926	foreach { name } [lindex $args 1] {
927	#puts stderr "Dataset: $name"
928	}
929	}
930	default {
931	error "unknown dataset option \"$option\" from server"
932	}
933	}
934	}
935
936	# ----------------------------------------------------------------------
937	# USAGE: Rebuild
938	#
939	# Called automatically whenever something changes that affects the
940	# data in the widget. Clears any existing data and rebuilds the
941	# widget to display new data.
942	# ----------------------------------------------------------------------
943	itcl::body Rappture::VtkStreamlinesViewer::Rebuild {} {
944	update
945	set w [winfo width $itk_component(view)]
946	set h [winfo height $itk_component(view)]
947	if { $w < 2 \|\| $h < 2 } {
948	$_dispatcher event -idle !rebuild
949	return
950	}
951
952	# Turn on buffering of commands to the server. We don't want to
953	# be preempted by a server disconnect/reconnect (which automatically
954	# generates a new call to Rebuild).
955	set _buffering 1
956
957	set _width $w
958	set _height $h
959	$_arcball resize $w $h
960	DoResize
961	#
962	# Reset the camera and other view parameters
963	#
964	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
965	$_arcball quaternion $q
966	if {$_view(ortho)} {
967	SendCmd "camera mode ortho"
968	} else {
969	SendCmd "camera mode persp"
970	}
971	DoRotate
972	PanCamera
973	set _first ""
974	InitSettings axis-xgrid axis-ygrid axis-zgrid axis-mode \
975	axis-visible axis-labels
976
977	SendCmd "imgflush"
978
979	set _limits(zmin) ""
980	set _limits(zmax) ""
981	set _first ""
982	puts stderr "objects=[get -objects]"
983	foreach dataobj [get -objects] {
984	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
985	set _first $dataobj
986	}
987	set _obj2datasets($dataobj) ""
988	foreach comp [$dataobj components] {
989	set tag $dataobj-$comp
990	if { ![info exists _datasets($tag)] } {
991	set bytes [$dataobj blob $comp]
992	set length [string length $bytes]
993	append _outbuf "dataset add $tag data follows $length\n"
994	append _outbuf $bytes
995	set _datasets($tag) 1
996	SetObjectStyle $dataobj $comp
997	}
998	lappend _obj2datasets($dataobj) $tag
999	if { [info exists _obj2ovride($dataobj-raise)] } {
1000	SendCmd "dataset visible 1 $tag"
1001	} else {
1002	SendCmd "dataset visible 0 $tag"
1003	}
1004	}
1005	}
1006	if {"" != $_first} {
1007	set location [$_first hints camera]
1008	if { $location != "" } {
1009	array set view $location
1010	}
1011
1012	foreach axis { x y z } {
1013	set label [$_first hints ${axis}label]
1014	if { $label != "" } {
1015	SendCmd "axis name $axis $label"
1016	}
1017	set units [$_first hints ${axis}units]
1018	if { $units != "" } {
1019	SendCmd "axis units $axis $units"
1020	}
1021	}
1022	array unset _scalarFields
1023	array unset _vectorFields
1024	set _currentField [$_first hints default]
1025	$itk_component(field) choices delete 0 end
1026	array unset _fields
1027	foreach { name title units } [$_first hints vectors] {
1028	set _vectorFields($title) $name
1029	$itk_component(field) choices insert end "$name" "$title"
1030	set _fields($name) [list $title $units]
1031	}
1032	foreach { name title units } [$_first hints scalars] {
1033	set _scalarFields($title) $name
1034	$itk_component(field) choices insert end "$name" "$title"
1035	set _fields($name) [list $title $units]
1036	}
1037	$itk_component(field) value $_currentField
1038	}
1039
1040	InitSettings streamlines-visible streamlines-palette volume-visible
1041
1042	if { $_reset } {
1043	InitSettings streamlines-seeds streamlines-opacity \
1044	streamlines-numpoints streamlines-lighting \
1045	streamlines-palette streamlines-field \
1046	volume-edges volume-lighting volume-opacity volume-wireframe \
1047	cutplane-xvisible cutplane-yvisible cutplane-zvisible \
1048	cutplane-xposition cutplane-yposition cutplane-zposition
1049	Zoom reset
1050	set _reset 0
1051	}
1052
1053	set _buffering 0; # Turn off buffering.
1054
1055	# Actually write the commands to the server socket. If it fails, we don't
1056	# care. We're finished here.
1057	blt::busy hold $itk_component(hull)
1058	SendBytes $_outbuf;
1059	blt::busy release $itk_component(hull)
1060	set _outbuf ""; # Clear the buffer.
1061	}
1062
1063	# ----------------------------------------------------------------------
1064	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1065	#
1066	# Returns a list of server IDs for the current datasets being displayed. This
1067	# is normally a single ID, but it might be a list of IDs if the current data
1068	# object has multiple components.
1069	# ----------------------------------------------------------------------
1070	itcl::body Rappture::VtkStreamlinesViewer::CurrentDatasets {args} {
1071	set flag [lindex $args 0]
1072	switch -- $flag {
1073	"-all" {
1074	if { [llength $args] > 1 } {
1075	error "CurrentDatasets: can't specify dataobj after \"-all\""
1076	}
1077	set dlist [get -objects]
1078	}
1079	"-visible" {
1080	if { [llength $args] > 1 } {
1081	set dlist {}
1082	set args [lrange $args 1 end]
1083	foreach dataobj $args {
1084	if { [info exists _obj2ovride($dataobj-raise)] } {
1085	lappend dlist $dataobj
1086	}
1087	}
1088	} else {
1089	set dlist [get -visible]
1090	}
1091	}
1092	default {
1093	set dlist $args
1094	}
1095	}
1096	set rlist ""
1097	foreach dataobj $dlist {
1098	foreach comp [$dataobj components] {
1099	set tag $dataobj-$comp
1100	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1101	lappend rlist $tag
1102	}
1103	}
1104	}
1105	return $rlist
1106	}
1107
1108	# ----------------------------------------------------------------------
1109	# USAGE: Zoom in
1110	# USAGE: Zoom out
1111	# USAGE: Zoom reset
1112	#
1113	# Called automatically when the user clicks on one of the zoom
1114	# controls for this widget. Changes the zoom for the current view.
1115	# ----------------------------------------------------------------------
1116	itcl::body Rappture::VtkStreamlinesViewer::Zoom {option} {
1117	switch -- $option {
1118	"in" {
1119	set _view(zoom) [expr {$_view(zoom)*1.25}]
1120	SendCmd "camera zoom $_view(zoom)"
1121	}
1122	"out" {
1123	set _view(zoom) [expr {$_view(zoom)*0.8}]
1124	SendCmd "camera zoom $_view(zoom)"
1125	}
1126	"reset" {
1127	array set _view {
1128	qw 1
1129	qx 0
1130	qy 0
1131	qz 0
1132	zoom 1.0
1133	xpan 0
1134	ypan 0
1135	}
1136	SendCmd "camera reset all"
1137	if { $_first != "" } {
1138	set location [$_first hints camera]
1139	if { $location != "" } {
1140	array set _view $location
1141	}
1142	}
1143	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1144	$_arcball quaternion $q
1145	DoRotate
1146	}
1147	}
1148	}
1149
1150	itcl::body Rappture::VtkStreamlinesViewer::PanCamera {} {
1151	set x $_view(xpan)
1152	set y $_view(ypan)
1153	SendCmd "camera pan $x $y"
1154	}
1155
1156
1157	# ----------------------------------------------------------------------
1158	# USAGE: Rotate click <x> <y>
1159	# USAGE: Rotate drag <x> <y>
1160	# USAGE: Rotate release <x> <y>
1161	#
1162	# Called automatically when the user clicks/drags/releases in the
1163	# plot area. Moves the plot according to the user's actions.
1164	# ----------------------------------------------------------------------
1165	itcl::body Rappture::VtkStreamlinesViewer::Rotate {option x y} {
1166	switch -- $option {
1167	"click" {
1168	$itk_component(view) configure -cursor fleur
1169	set _click(x) $x
1170	set _click(y) $y
1171	}
1172	"drag" {
1173	if {[array size _click] == 0} {
1174	Rotate click $x $y
1175	} else {
1176	set w [winfo width $itk_component(view)]
1177	set h [winfo height $itk_component(view)]
1178	if {$w <= 0 \|\| $h <= 0} {
1179	return
1180	}
1181
1182	if {[catch {
1183	# this fails sometimes for no apparent reason
1184	set dx [expr {double($x-$_click(x))/$w}]
1185	set dy [expr {double($y-$_click(y))/$h}]
1186	}]} {
1187	return
1188	}
1189	if { $dx == 0 && $dy == 0 } {
1190	return
1191	}
1192	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1193	EventuallyRotate $q
1194	set _click(x) $x
1195	set _click(y) $y
1196	}
1197	}
1198	"release" {
1199	Rotate drag $x $y
1200	$itk_component(view) configure -cursor ""
1201	catch {unset _click}
1202	}
1203	default {
1204	error "bad option \"$option\": should be click, drag, release"
1205	}
1206	}
1207	}
1208
1209	itcl::body Rappture::VtkStreamlinesViewer::Pick {x y} {
1210	foreach tag [CurrentDatasets -visible] {
1211	SendCmd "dataset getscalar pixel $x $y $tag"
1212	}
1213	}
1214
1215	# ----------------------------------------------------------------------
1216	# USAGE: $this Pan click x y
1217	# $this Pan drag x y
1218	# $this Pan release x y
1219	#
1220	# Called automatically when the user clicks on one of the zoom
1221	# controls for this widget. Changes the zoom for the current view.
1222	# ----------------------------------------------------------------------
1223	itcl::body Rappture::VtkStreamlinesViewer::Pan {option x y} {
1224	switch -- $option {
1225	"set" {
1226	set w [winfo width $itk_component(view)]
1227	set h [winfo height $itk_component(view)]
1228	set x [expr $x / double($w)]
1229	set y [expr $y / double($h)]
1230	set _view(xpan) [expr $_view(xpan) + $x]
1231	set _view(ypan) [expr $_view(ypan) + $y]
1232	PanCamera
1233	return
1234	}
1235	"click" {
1236	set _click(x) $x
1237	set _click(y) $y
1238	$itk_component(view) configure -cursor hand1
1239	}
1240	"drag" {
1241	if { ![info exists _click(x)] } {
1242	set _click(x) $x
1243	}
1244	if { ![info exists _click(y)] } {
1245	set _click(y) $y
1246	}
1247	set w [winfo width $itk_component(view)]
1248	set h [winfo height $itk_component(view)]
1249	set dx [expr ($_click(x) - $x)/double($w)]
1250	set dy [expr ($_click(y) - $y)/double($h)]
1251	set _click(x) $x
1252	set _click(y) $y
1253	set _view(xpan) [expr $_view(xpan) - $dx]
1254	set _view(ypan) [expr $_view(ypan) - $dy]
1255	PanCamera
1256	}
1257	"release" {
1258	Pan drag $x $y
1259	$itk_component(view) configure -cursor ""
1260	}
1261	default {
1262	error "unknown option \"$option\": should set, click, drag, or release"
1263	}
1264	}
1265	}
1266
1267	# ----------------------------------------------------------------------
1268	# USAGE: InitSettings <what> ?<value>?
1269	#
1270	# Used internally to update rendering settings whenever parameters
1271	# change in the popup settings panel. Sends the new settings off
1272	# to the back end.
1273	# ----------------------------------------------------------------------
1274	itcl::body Rappture::VtkStreamlinesViewer::InitSettings { args } {
1275	foreach spec $args {
1276	if { [info exists _settings($_first-$spec)] } {
1277	# Reset global setting with dataobj specific setting
1278	set _settings($spec) $_settings($_first-$spec)
1279	}
1280	AdjustSetting $spec
1281	}
1282	}
1283
1284	#
1285	# AdjustSetting --
1286	#
1287	# Changes/updates a specific setting in the widget. There are
1288	# usually user-setable option. Commands are sent to the render
1289	# server.
1290	#
1291	itcl::body Rappture::VtkStreamlinesViewer::AdjustSetting {what {value ""}} {
1292	if { ![isconnected] } {
1293	return
1294	}
1295	switch -- $what {
1296	"volume-opacity" {
1297	set val $_settings(volume-opacity)
1298	set sval [expr { 0.01 * double($val) }]
1299	foreach dataset [CurrentDatasets -visible] {
1300	SendCmd "polydata opacity $sval $dataset"
1301	}
1302	}
1303	"volume-wireframe" {
1304	set bool $_settings(volume-wireframe)
1305	foreach dataset [CurrentDatasets -visible] {
1306	SendCmd "polydata wireframe $bool $dataset"
1307	}
1308	}
1309	"volume-visible" {
1310	set bool $_settings(volume-visible)
1311	foreach dataset [CurrentDatasets -visible] {
1312	SendCmd "polydata visible $bool $dataset"
1313	}
1314	if { $bool } {
1315	Rappture::Tooltip::for $itk_component(volume) \
1316	"Hide the volume"
1317	} else {
1318	Rappture::Tooltip::for $itk_component(volume) \
1319	"Show the volume"
1320	}
1321	}
1322	"volume-lighting" {
1323	set bool $_settings(volume-lighting)
1324	foreach dataset [CurrentDatasets -visible] {
1325	SendCmd "polydata lighting $bool $dataset"
1326	}
1327	}
1328	"volume-edges" {
1329	set bool $_settings(volume-edges)
1330	foreach dataset [CurrentDatasets -visible] {
1331	SendCmd "polydata edges $bool $dataset"
1332	}
1333	}
1334	"axis-visible" {
1335	set bool $_settings(axis-visible)
1336	SendCmd "axis visible all $bool"
1337	}
1338	"axis-labels" {
1339	set bool $_settings(axis-labels)
1340	SendCmd "axis labels all $bool"
1341	}
1342	"axis-xgrid" - "axis-ygrid" - "axis-zgrid" {
1343	set axis [string range $what 5 5]
1344	set bool $_settings($what)
1345	SendCmd "axis grid $axis $bool"
1346	}
1347	"axis-mode" {
1348	set mode [$itk_component(axismode) value]
1349	set mode [$itk_component(axismode) translate $mode]
1350	set _settings($what) $mode
1351	SendCmd "axis flymode $mode"
1352	}
1353	"cutplane-edges" {
1354	set bool $_settings($what)
1355	foreach dataset [CurrentDatasets -visible] {
1356	SendCmd "cutplane edges $bool $dataset"
1357	}
1358	}
1359	"cutplane-visible" {
1360	set bool $_settings($what)
1361	foreach dataset [CurrentDatasets -visible] {
1362	SendCmd "cutplane visible $bool $dataset"
1363	}
1364	}
1365	"cutplane-wireframe" {
1366	set bool $_settings($what)
1367	foreach dataset [CurrentDatasets -visible] {
1368	SendCmd "cutplane wireframe $bool $dataset"
1369	}
1370	}
1371	"cutplane-lighting" {
1372	set bool $_settings($what)
1373	foreach dataset [CurrentDatasets -visible] {
1374	SendCmd "cutplane lighting $bool $dataset"
1375	}
1376	}
1377	"cutplane-opacity" {
1378	set val $_settings($what)
1379	set sval [expr { 0.01 * double($val) }]
1380	foreach dataset [CurrentDatasets -visible] {
1381	SendCmd "cutplane opacity $sval $dataset"
1382	}
1383	}
1384	"cutplane-xvisible" - "cutplane-yvisible" - "cutplane-zvisible" {
1385	set axis [string range $what 9 9]
1386	set bool $_settings($what)
1387	if { $bool } {
1388	$itk_component(${axis}CutScale) configure -state normal \
1389	-troughcolor white
1390	} else {
1391	$itk_component(${axis}CutScale) configure -state disabled \
1392	-troughcolor grey82
1393	}
1394	SendCmd "cutplane axis $axis $bool"
1395	SendCmd "cutplane colormode $_colorMode"
1396	}
1397	"cutplane-xposition" - "cutplane-yposition" - "cutplane-zposition" {
1398	set axis [string range $what 9 9]
1399	set pos [expr $_settings($what) * 0.01]
1400	SendCmd "cutplane slice ${axis} ${pos}"
1401	set _cutplanePending 0
1402	}
1403	"streamlines-seeds" {
1404	set bool $_settings($what)
1405	foreach dataset [CurrentDatasets -visible] {
1406	SendCmd "streamlines seed visible $bool $dataset"
1407	}
1408	}
1409	"streamlines-numpoints" {
1410	set density $_settings($what)
1411	EventuallyReseed $density
1412	}
1413	"streamlines-visible" {
1414	set bool $_settings($what)
1415	foreach dataset [CurrentDatasets -visible] {
1416	SendCmd "streamlines visible $bool $dataset"
1417	}
1418	if { $bool } {
1419	Rappture::Tooltip::for $itk_component(streamlines) \
1420	"Hide the streamlines"
1421	} else {
1422	Rappture::Tooltip::for $itk_component(streamlines) \
1423	"Show the streamlines"
1424	}
1425	}
1426	"streamlines-mode" {
1427	set mode [$itk_component(streammode) value]
1428	set _settings(streamlines-mode) $mode
1429	foreach dataset [CurrentDatasets -visible] {
1430	switch -- $mode {
1431	"lines" {
1432	SendCmd "streamlines lines $dataset"
1433	}
1434	"ribbons" {
1435	SendCmd "streamlines ribbons 3 0 $dataset"
1436	}
1437	"tubes" {
1438	SendCmd "streamlines tubes 5 3 $dataset"
1439	}
1440	}
1441	}
1442	}
1443	"streamlines-palette" {
1444	set palette [$itk_component(palette) value]
1445	set _settings(streamlines-palette) $palette
1446	foreach dataset [CurrentDatasets -visible $_first] {
1447	foreach {dataobj comp} [split $dataset -] break
1448	ChangeColormap $dataobj $comp $palette
1449	}
1450	RequestLegend
1451	}
1452	"streamlines-opacity" {
1453	set val $_settings(streamlines-opacity)
1454	set sval [expr { 0.01 * double($val) }]
1455	foreach dataset [CurrentDatasets -visible $_first] {
1456	SendCmd "streamlines opacity $sval $dataset"
1457	}
1458	}
1459	"streamlines-scale" {
1460	set val $_settings(streamlines-scale)
1461	set sval [expr { 0.01 * double($val) }]
1462	foreach dataset [CurrentDatasets -visible $_first] {
1463	SendCmd "streamlines scale $sval $sval $sval $dataset"
1464	}
1465	}
1466	"streamlines-lighting" {
1467	set bool $_settings(streamlines-lighting)
1468	foreach dataset [CurrentDatasets -visible $_first] {
1469	SendCmd "streamlines lighting $bool $dataset"
1470	}
1471	}
1472	"streamlines-field" {
1473	set new [$itk_component(field) value]
1474	set value [$itk_component(axismode) translate $new]
1475	set _settings(streamlines-field) $value
1476	if { [info exists _scalarFields($new)] } {
1477	set name $_scalarFields($new)
1478	set _colorMode scalar
1479	set fieldType scalar
1480	set _currentField $new
1481	} elseif { [info exists _vectorFields($new)] } {
1482	set name $_vectorFields($new)
1483	set _colorMode vmag
1484	set fieldType vector
1485	set _currentField $new
1486	} else {
1487	puts stderr "unknown field \"$new\""
1488	return
1489	}
1490	foreach dataset [CurrentDatasets -visible] {
1491	SendCmd "dataset ${fieldType} ${name} $dataset"
1492	SendCmd "streamlines colormode $_colorMode $dataset"
1493	SendCmd "cutplane colormode $_colorMode $dataset"
1494	}
1495	RequestLegend
1496	}
1497	default {
1498	error "don't know how to fix $what"
1499	}
1500	}
1501	}
1502
1503	#
1504	# RequestLegend --
1505	#
1506	# Request a new legend from the server. The size of the legend
1507	# is determined from the height of the canvas. It will be rotated
1508	# to be vertical when drawn.
1509	#
1510	itcl::body Rappture::VtkStreamlinesViewer::RequestLegend {} {
1511	set font "Arial 8"
1512	set lineht [font metrics $font -linespace]
1513	set c $itk_component(legend)
1514	set w 12
1515	set h [expr {$_height - 3 * ($lineht + 2)}]
1516	if { $h < 1} {
1517	return
1518	}
1519	# Set the legend on the first streamlines dataset.
1520	foreach dataset [CurrentDatasets -visible $_first] {
1521	foreach {dataobj comp} [split $dataset -] break
1522	if { [info exists _dataset2style($dataset)] } {
1523	SendCmd "legend $_dataset2style($dataset) $_colorMode {} $w $h 0"
1524	break;
1525	}
1526	}
1527	}
1528
1529	#
1530	# ChangeColormap --
1531	#
1532	itcl::body Rappture::VtkStreamlinesViewer::ChangeColormap {dataobj comp color} {
1533	set tag $dataobj-$comp
1534	if { ![info exist _style($tag)] } {
1535	error "no initial colormap"
1536	}
1537	array set style $_style($tag)
1538	set style(-color) $color
1539	set _style($tag) [array get style]
1540	SetColormap $dataobj $comp
1541	}
1542
1543	#
1544	# SetColormap --
1545	#
1546	itcl::body Rappture::VtkStreamlinesViewer::SetColormap { dataobj comp } {
1547	array set style {
1548	-color BGYOR
1549	-levels 6
1550	-opacity 1.0
1551	}
1552	set tag $dataobj-$comp
1553	if { ![info exists _initialStyle($tag)] } {
1554	# Save the initial component style.
1555	set _initialStyle($tag) [$dataobj style $comp]
1556	}
1557
1558	# Override defaults with initial style defined in xml.
1559	array set style $_initialStyle($tag)
1560
1561	if { ![info exists _style($tag)] } {
1562	set _style($tag) [array get style]
1563	}
1564	# Override initial style with current style.
1565	array set style $_style($tag)
1566
1567	set name "$style(-color):$style(-levels):$style(-opacity)"
1568	if { ![info exists _colormaps($name)] } {
1569	BuildColormap $name [array get style]
1570	set _colormaps($name) 1
1571	}
1572	if { ![info exists _dataset2style($tag)] \|\|
1573	$_dataset2style($tag) != $name } {
1574	SendCmd "streamlines colormap $name $tag"
1575	SendCmd "cutplane colormap $name $tag"
1576	set _dataset2style($tag) $name
1577	}
1578	}
1579
1580	itcl::body Rappture::VtkStreamlinesViewer::ColorsToColormap { colors } {
1581	switch -- $colors {
1582	"grey-to-blue" {
1583	return {
1584	0.0 0.200 0.200 0.200
1585	0.14285714285714285 0.400 0.400 0.400
1586	0.2857142857142857 0.600 0.600 0.600
1587	0.42857142857142855 0.900 0.900 0.900
1588	0.5714285714285714 0.800 1.000 1.000
1589	0.7142857142857143 0.600 1.000 1.000
1590	0.8571428571428571 0.400 0.900 1.000
1591	1.0 0.000 0.600 0.800
1592	}
1593	}
1594	"blue-to-grey" {
1595	return {
1596	0.0 0.000 0.600 0.800
1597	0.14285714285714285 0.400 0.900 1.000
1598	0.2857142857142857 0.600 1.000 1.000
1599	0.42857142857142855 0.800 1.000 1.000
1600	0.5714285714285714 0.900 0.900 0.900
1601	0.7142857142857143 0.600 0.600 0.600
1602	0.8571428571428571 0.400 0.400 0.400
1603	1.0 0.200 0.200 0.200
1604	}
1605	}
1606	"blue" {
1607	return {
1608	0.0 0.900 1.000 1.000
1609	0.1111111111111111 0.800 0.983 1.000
1610	0.2222222222222222 0.700 0.950 1.000
1611	0.3333333333333333 0.600 0.900 1.000
1612	0.4444444444444444 0.500 0.833 1.000
1613	0.5555555555555556 0.400 0.750 1.000
1614	0.6666666666666666 0.300 0.650 1.000
1615	0.7777777777777778 0.200 0.533 1.000
1616	0.8888888888888888 0.100 0.400 1.000
1617	1.0 0.000 0.250 1.000
1618	}
1619	}
1620	"brown-to-blue" {
1621	return {
1622	0.0 0.200 0.100 0.000
1623	0.09090909090909091 0.400 0.187 0.000
1624	0.18181818181818182 0.600 0.379 0.210
1625	0.2727272727272727 0.800 0.608 0.480
1626	0.36363636363636365 0.850 0.688 0.595
1627	0.45454545454545453 0.950 0.855 0.808
1628	0.5454545454545454 0.800 0.993 1.000
1629	0.6363636363636364 0.600 0.973 1.000
1630	0.7272727272727273 0.400 0.940 1.000
1631	0.8181818181818182 0.200 0.893 1.000
1632	0.9090909090909091 0.000 0.667 0.800
1633	1.0 0.000 0.480 0.600
1634	}
1635	}
1636	"blue-to-brown" {
1637	return {
1638	0.0 0.000 0.480 0.600
1639	0.09090909090909091 0.000 0.667 0.800
1640	0.18181818181818182 0.200 0.893 1.000
1641	0.2727272727272727 0.400 0.940 1.000
1642	0.36363636363636365 0.600 0.973 1.000
1643	0.45454545454545453 0.800 0.993 1.000
1644	0.5454545454545454 0.950 0.855 0.808
1645	0.6363636363636364 0.850 0.688 0.595
1646	0.7272727272727273 0.800 0.608 0.480
1647	0.8181818181818182 0.600 0.379 0.210
1648	0.9090909090909091 0.400 0.187 0.000
1649	1.0 0.200 0.100 0.000
1650	}
1651	}
1652	"blue-to-orange" {
1653	return {
1654	0.0 0.000 0.167 1.000
1655	0.09090909090909091 0.100 0.400 1.000
1656	0.18181818181818182 0.200 0.600 1.000
1657	0.2727272727272727 0.400 0.800 1.000
1658	0.36363636363636365 0.600 0.933 1.000
1659	0.45454545454545453 0.800 1.000 1.000
1660	0.5454545454545454 1.000 1.000 0.800
1661	0.6363636363636364 1.000 0.933 0.600
1662	0.7272727272727273 1.000 0.800 0.400
1663	0.8181818181818182 1.000 0.600 0.200
1664	0.9090909090909091 1.000 0.400 0.100
1665	1.0 1.000 0.167 0.000
1666	}
1667	}
1668	"orange-to-blue" {
1669	return {
1670	0.0 1.000 0.167 0.000
1671	0.09090909090909091 1.000 0.400 0.100
1672	0.18181818181818182 1.000 0.600 0.200
1673	0.2727272727272727 1.000 0.800 0.400
1674	0.36363636363636365 1.000 0.933 0.600
1675	0.45454545454545453 1.000 1.000 0.800
1676	0.5454545454545454 0.800 1.000 1.000
1677	0.6363636363636364 0.600 0.933 1.000
1678	0.7272727272727273 0.400 0.800 1.000
1679	0.8181818181818182 0.200 0.600 1.000
1680	0.9090909090909091 0.100 0.400 1.000
1681	1.0 0.000 0.167 1.000
1682	}
1683	}
1684	"rainbow" {
1685	set clist {
1686	"#EE82EE"
1687	"#4B0082"
1688	"blue"
1689	"#008000"
1690	"yellow"
1691	"#FFA500"
1692	"red"
1693	}
1694	}
1695	"BGYOR" {
1696	set clist {
1697	"blue"
1698	"#008000"
1699	"yellow"
1700	"#FFA500"
1701	"red"
1702	}
1703	}
1704	"ROYGB" {
1705	set clist {
1706	"red"
1707	"#FFA500"
1708	"yellow"
1709	"#008000"
1710	"blue"
1711	}
1712	}
1713	"RYGCB" {
1714	set clist {
1715	"red"
1716	"yellow"
1717	"green"
1718	"cyan"
1719	"blue"
1720	}
1721	}
1722	"BCGYR" {
1723	set clist {
1724	"blue"
1725	"cyan"
1726	"green"
1727	"yellow"
1728	"red"
1729	}
1730	}
1731	"spectral" {
1732	return {
1733	0.0 0.150 0.300 1.000
1734	0.1 0.250 0.630 1.000
1735	0.2 0.450 0.850 1.000
1736	0.3 0.670 0.970 1.000
1737	0.4 0.880 1.000 1.000
1738	0.5 1.000 1.000 0.750
1739	0.6 1.000 0.880 0.600
1740	0.7 1.000 0.680 0.450
1741	0.8 0.970 0.430 0.370
1742	0.9 0.850 0.150 0.196
1743	1.0 0.650 0.000 0.130
1744	}
1745	}
1746	"green-to-magenta" {
1747	return {
1748	0.0 0.000 0.316 0.000
1749	0.06666666666666667 0.000 0.526 0.000
1750	0.13333333333333333 0.000 0.737 0.000
1751	0.2 0.000 0.947 0.000
1752	0.26666666666666666 0.316 1.000 0.316
1753	0.3333333333333333 0.526 1.000 0.526
1754	0.4 0.737 1.000 0.737
1755	0.4666666666666667 1.000 1.000 1.000
1756	0.5333333333333333 1.000 0.947 1.000
1757	0.6 1.000 0.737 1.000
1758	0.6666666666666666 1.000 0.526 1.000
1759	0.7333333333333333 1.000 0.316 1.000
1760	0.8 0.947 0.000 0.947
1761	0.8666666666666667 0.737 0.000 0.737
1762	0.9333333333333333 0.526 0.000 0.526
1763	1.0 0.316 0.000 0.316
1764	}
1765	}
1766	"greyscale" {
1767	return {
1768	0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0
1769	}
1770	}
1771	"nanohub" {
1772	set clist "white yellow green cyan blue magenta"
1773	}
1774	default {
1775	set clist $colors
1776	}
1777	}
1778	set cmap {}
1779	for {set i 0} {$i < [llength $clist]} {incr i} {
1780	set x [expr {double($i)/([llength $clist]-1)}]
1781	set color [lindex $clist $i]
1782	append cmap "$x [Color2RGB $color] "
1783	}
1784	return $cmap
1785	}
1786
1787	#
1788	# BuildColormap --
1789	#
1790	itcl::body Rappture::VtkStreamlinesViewer::BuildColormap { name styles } {
1791	array set style $styles
1792	set cmap [ColorsToColormap $style(-color)]
1793	if { [llength $cmap] == 0 } {
1794	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
1795	}
1796	if { ![info exists _settings(volume-opacity)] } {
1797	set _settings(volume-opacity) $style(-opacity)
1798	}
1799	set max $_settings(volume-opacity)
1800
1801	set wmap "0.0 1.0 1.0 1.0"
1802	SendCmd "colormap add $name { $cmap } { $wmap }"
1803	}
1804
1805	# ----------------------------------------------------------------------
1806	# CONFIGURATION OPTION: -plotbackground
1807	# ----------------------------------------------------------------------
1808	itcl::configbody Rappture::VtkStreamlinesViewer::plotbackground {
1809	if { [isconnected] } {
1810	foreach {r g b} [Color2RGB $itk_option(-plotbackground)] break
1811	SendCmd "screen bgcolor $r $g $b"
1812	}
1813	}
1814
1815	# ----------------------------------------------------------------------
1816	# CONFIGURATION OPTION: -plotforeground
1817	# ----------------------------------------------------------------------
1818	itcl::configbody Rappture::VtkStreamlinesViewer::plotforeground {
1819	if { [isconnected] } {
1820	foreach {r g b} [Color2RGB $itk_option(-plotforeground)] break
1821	#fix this!
1822	#SendCmd "color background $r $g $b"
1823	}
1824	}
1825
1826	itcl::body Rappture::VtkStreamlinesViewer::limits { dataobj } {
1827	return
1828	array unset _limits $dataobj-*
1829	foreach comp [$dataobj components] {
1830	set tag $dataobj-$comp
1831	if { ![info exists _limits($tag)] } {
1832	set data [$dataobj blob $comp]
1833	set tmpfile file[pid].vtk
1834	set f [open "$tmpfile" "w"]
1835	fconfigure $f -translation binary
1836	puts $f $data
1837	close $f
1838	set reader [vtkDataSetReader $tag-xvtkDataSetReader]
1839	$reader SetFileName $tmpfile
1840	$reader ReadAllScalarsOn
1841	$reader ReadAllVectorsOn
1842	$reader ReadAllFieldsOn
1843	$reader Update
1844	set output [$reader GetOutput]
1845	set _limits($tag) [$output GetBounds]
1846	set pointData [$output GetPointData]
1847	puts stderr "\#scalars=[$reader GetNumberOfScalarsInFile]"
1848	puts stderr "\#fielddata=[$reader GetNumberOfFieldDataInFile]"
1849	puts stderr "fielddataname=[$reader GetFieldDataNameInFile 0]"
1850	set fieldData [$output GetFieldData]
1851	set pointData [$output GetPointData]
1852	puts stderr "field \#arrays=[$fieldData GetNumberOfArrays]"
1853	for { set i 0 } { $i < [$fieldData GetNumberOfArrays] } { incr i } {
1854	puts stderr [$fieldData GetArrayName $i]
1855	}
1856	puts stderr "point \#arrays=[$pointData GetNumberOfArrays]"
1857	for { set i 0 } { $i < [$pointData GetNumberOfArrays] } { incr i } {
1858	set name [$pointData GetArrayName $i]
1859	if { ![info exists _fields($name)] } {
1860	$itk_component(field) choices insert end "$name" "$name"
1861	set _fields($name) 1
1862	}
1863	}
1864	puts stderr "field \#components=[$fieldData GetNumberOfComponents]"
1865	puts stderr "point \#components=[$pointData GetNumberOfComponents]"
1866	puts stderr "field \#tuples=[$fieldData GetNumberOfTuples]"
1867	puts stderr "point \#tuples=[$pointData GetNumberOfTuples]"
1868	puts stderr "point \#scalars=[$pointData GetScalars]"
1869	puts stderr vectors=[$pointData GetVectors]
1870	rename $output ""
1871	rename $reader ""
1872	file delete $tmpfile
1873	}
1874	foreach { xMin xMax yMin yMax zMin zMax} $_limits($tag) break
1875	if {![info exists limits(xmin)] \|\| $limits(xmin) > $xMin} {
1876	set limits(xmin) $xMin
1877	}
1878	if {![info exists limits(xmax)] \|\| $limits(xmax) < $xMax} {
1879	set limits(xmax) $xMax
1880	}
1881	if {![info exists limits(ymin)] \|\| $limits(ymin) > $yMin} {
1882	set limits(ymin) $xMin
1883	}
1884	if {![info exists limits(ymax)] \|\| $limits(ymax) < $yMax} {
1885	set limits(ymax) $yMax
1886	}
1887	if {![info exists limits(zmin)] \|\| $limits(zmin) > $zMin} {
1888	set limits(zmin) $zMin
1889	}
1890	if {![info exists limits(zmax)] \|\| $limits(zmax) < $zMax} {
1891	set limits(zmax) $zMax
1892	}
1893	}
1894	return [array get limits]
1895	}
1896
1897	itcl::body Rappture::VtkStreamlinesViewer::BuildVolumeTab {} {
1898
1899	set fg [option get $itk_component(hull) font Font]
1900	#set bfg [option get $itk_component(hull) boldFont Font]
1901
1902	set inner [$itk_component(main) insert end \
1903	-title "Volume Settings" \
1904	-icon [Rappture::icon volume-on]]
1905	$inner configure -borderwidth 4
1906
1907	checkbutton $inner.volume \
1908	-text "Show Volume" \
1909	-variable [itcl::scope _settings(volume-visible)] \
1910	-command [itcl::code $this AdjustSetting volume-visible] \
1911	-font "Arial 9"
1912
1913	checkbutton $inner.wireframe \
1914	-text "Show Wireframe" \
1915	-variable [itcl::scope _settings(volume-wireframe)] \
1916	-command [itcl::code $this AdjustSetting volume-wireframe] \
1917	-font "Arial 9"
1918
1919	checkbutton $inner.lighting \
1920	-text "Enable Lighting" \
1921	-variable [itcl::scope _settings(volume-lighting)] \
1922	-command [itcl::code $this AdjustSetting volume-lighting] \
1923	-font "Arial 9"
1924
1925	checkbutton $inner.edges \
1926	-text "Show Edges" \
1927	-variable [itcl::scope _settings(volume-edges)] \
1928	-command [itcl::code $this AdjustSetting volume-edges] \
1929	-font "Arial 9"
1930
1931	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1932	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1933	-variable [itcl::scope _settings(volume-opacity)] \
1934	-width 10 \
1935	-showvalue off \
1936	-command [itcl::code $this AdjustSetting volume-opacity]
1937
1938	blt::table $inner \
1939	0,0 $inner.volume -anchor w -pady 2 \
1940	1,0 $inner.wireframe -anchor w -pady 2 \
1941	2,0 $inner.lighting -anchor w -pady 2 \
1942	3,0 $inner.edges -anchor w -pady 2 \
1943	4,0 $inner.opacity_l -anchor w -pady 2 \
1944	5,0 $inner.opacity -fill x -pady 2
1945
1946	blt::table configure $inner r* c* -resize none
1947	blt::table configure $inner r6 c1 -resize expand
1948	}
1949
1950
1951	itcl::body Rappture::VtkStreamlinesViewer::BuildStreamsTab {} {
1952
1953	set fg [option get $itk_component(hull) font Font]
1954	#set bfg [option get $itk_component(hull) boldFont Font]
1955
1956	set inner [$itk_component(main) insert end \
1957	-title "Streams Settings" \
1958	-icon [Rappture::icon streamlines-on]]
1959	$inner configure -borderwidth 4
1960
1961	checkbutton $inner.streamlines \
1962	-text "Show Streamlines" \
1963	-variable [itcl::scope _settings(streamlines-visible)] \
1964	-command [itcl::code $this AdjustSetting streamlines-visible] \
1965	-font "Arial 9"
1966
1967	checkbutton $inner.lighting \
1968	-text "Enable Lighting" \
1969	-variable [itcl::scope _settings(streamlines-lighting)] \
1970	-command [itcl::code $this AdjustSetting streamlines-lighting] \
1971	-font "Arial 9"
1972
1973	checkbutton $inner.seeds \
1974	-text "Show Seeds" \
1975	-variable [itcl::scope _settings(streamlines-seeds)] \
1976	-command [itcl::code $this AdjustSetting streamlines-seeds] \
1977	-font "Arial 9"
1978
1979	label $inner.mode_l -text "Mode" -font "Arial 9"
1980	itk_component add streammode {
1981	Rappture::Combobox $inner.mode -width 10 -editable no
1982	}
1983	$inner.mode choices insert end \
1984	"lines" "lines" \
1985	"ribbons" "ribbons" \
1986	"tubes" "tubes"
1987	$itk_component(streammode) value "lines"
1988	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting streamlines-mode]
1989
1990	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1991	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1992	-variable [itcl::scope _settings(streamlines-opacity)] \
1993	-width 10 \
1994	-showvalue off \
1995	-command [itcl::code $this AdjustSetting streamlines-opacity]
1996
1997	label $inner.density_l -text "Number of Seeds" -font "Arial 9"
1998	::scale $inner.density -from 1 -to 1000 -orient horizontal \
1999	-variable [itcl::scope _settings(streamlines-numpoints)] \
2000	-width 10 \
2001	-showvalue on \
2002	-command [itcl::code $this AdjustSetting streamlines-numpoints]
2003
2004	label $inner.scale_l -text "Scale" -font "Arial 9"
2005	::scale $inner.scale -from 1 -to 100 -orient horizontal \
2006	-variable [itcl::scope _settings(streamlines-scale)] \
2007	-width 10 \
2008	-showvalue off \
2009	-command [itcl::code $this AdjustSetting streamlines-scale]
2010
2011	label $inner.field_l -text "Field" -font "Arial 9"
2012	itk_component add field {
2013	Rappture::Combobox $inner.field -width 10 -editable no
2014	}
2015	bind $inner.field <<Value>> \
2016	[itcl::code $this AdjustSetting streamlines-field]
2017
2018	label $inner.palette_l -text "Palette" -font "Arial 9"
2019	itk_component add palette {
2020	Rappture::Combobox $inner.palette -width 10 -editable no
2021	}
2022	$inner.palette choices insert end \
2023	"BCGYR" "BCGYR" \
2024	"BGYOR" "BGYOR" \
2025	"blue" "blue" \
2026	"blue-to-brown" "blue-to-brown" \
2027	"blue-to-orange" "blue-to-orange" \
2028	"blue-to-grey" "blue-to-grey" \
2029	"green-to-magenta" "green-to-magenta" \
2030	"greyscale" "greyscale" \
2031	"nanohub" "nanohub" \
2032	"rainbow" "rainbow" \
2033	"spectral" "spectral" \
2034	"ROYGB" "ROYGB" \
2035	"RYGCB" "RYGCB" \
2036	"brown-to-blue" "brown-to-blue" \
2037	"grey-to-blue" "grey-to-blue" \
2038	"orange-to-blue" "orange-to-blue"
2039
2040	$itk_component(palette) value "BCGYR"
2041	bind $inner.palette <<Value>> \
2042	[itcl::code $this AdjustSetting streamlines-palette]
2043
2044	blt::table $inner \
2045	0,0 $inner.streamlines -anchor w -pady 2 -cspan 2 \
2046	1,0 $inner.lighting -anchor w -pady 2 -cspan 2 \
2047	2,0 $inner.seeds -anchor w -pady 2 -cspan 2 \
2048	3,0 $inner.density_l -anchor w -pady 2 -cspan 2 \
2049	4,0 $inner.density -fill x -pady 2 -cspan 2 \
2050	5,0 $inner.mode_l -anchor w -pady 2 \
2051	5,1 $inner.mode -anchor w -pady 2 \
2052	6,0 $inner.opacity_l -anchor w -pady 2 -cspan 2 \
2053	7,0 $inner.opacity -fill x -pady 2 -cspan 2 \
2054	8,0 $inner.field_l -anchor w -pady 2 \
2055	8,1 $inner.field -anchor w -pady 2 \
2056	9,0 $inner.palette_l -anchor w -pady 2 \
2057	9,1 $inner.palette -anchor w -pady 2 \
2058
2059
2060	blt::table configure $inner r* c* -resize none
2061	blt::table configure $inner r10 c1 c2 -resize expand
2062	}
2063
2064	itcl::body Rappture::VtkStreamlinesViewer::BuildAxisTab {} {
2065
2066	set fg [option get $itk_component(hull) font Font]
2067	#set bfg [option get $itk_component(hull) boldFont Font]
2068
2069	set inner [$itk_component(main) insert end \
2070	-title "Axis Settings" \
2071	-icon [Rappture::icon axis1]]
2072	$inner configure -borderwidth 4
2073
2074	checkbutton $inner.visible \
2075	-text "Show Axes" \
2076	-variable [itcl::scope _settings(axis-visible)] \
2077	-command [itcl::code $this AdjustSetting axis-visible] \
2078	-font "Arial 9"
2079
2080	checkbutton $inner.labels \
2081	-text "Show Axis Labels" \
2082	-variable [itcl::scope _settings(axis-labels)] \
2083	-command [itcl::code $this AdjustSetting axis-labels] \
2084	-font "Arial 9"
2085
2086	checkbutton $inner.gridx \
2087	-text "Show X Grid" \
2088	-variable [itcl::scope _settings(axis-xgrid)] \
2089	-command [itcl::code $this AdjustSetting axis-xgrid] \
2090	-font "Arial 9"
2091	checkbutton $inner.gridy \
2092	-text "Show Y Grid" \
2093	-variable [itcl::scope _settings(axis-ygrid)] \
2094	-command [itcl::code $this AdjustSetting axis-ygrid] \
2095	-font "Arial 9"
2096	checkbutton $inner.gridz \
2097	-text "Show Z Grid" \
2098	-variable [itcl::scope _settings(axis-zgrid)] \
2099	-command [itcl::code $this AdjustSetting axis-zgrid] \
2100	-font "Arial 9"
2101
2102	label $inner.mode_l -text "Mode" -font "Arial 9"
2103
2104	itk_component add axismode {
2105	Rappture::Combobox $inner.mode -width 10 -editable no
2106	}
2107	$inner.mode choices insert end \
2108	"static_triad" "static" \
2109	"closest_triad" "closest" \
2110	"furthest_triad" "furthest" \
2111	"outer_edges" "outer"
2112	$itk_component(axismode) value "static"
2113	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting axis-mode]
2114
2115	blt::table $inner \
2116	0,0 $inner.visible -anchor w -cspan 2 \
2117	1,0 $inner.labels -anchor w -cspan 2 \
2118	2,0 $inner.gridx -anchor w -cspan 2 \
2119	3,0 $inner.gridy -anchor w -cspan 2 \
2120	4,0 $inner.gridz -anchor w -cspan 2 \
2121	5,0 $inner.mode_l -anchor w -cspan 2 -padx { 2 0 } \
2122	6,0 $inner.mode -fill x -cspan 2
2123
2124	blt::table configure $inner r* c* -resize none
2125	blt::table configure $inner r7 c1 -resize expand
2126	}
2127
2128
2129	itcl::body Rappture::VtkStreamlinesViewer::BuildCameraTab {} {
2130	set inner [$itk_component(main) insert end \
2131	-title "Camera Settings" \
2132	-icon [Rappture::icon camera]]
2133	$inner configure -borderwidth 4
2134
2135	set labels { qx qy qz qw xpan ypan zoom }
2136	set row 0
2137	foreach tag $labels {
2138	label $inner.${tag}label -text $tag -font "Arial 9"
2139	entry $inner.${tag} -font "Arial 9" -bg white \
2140	-textvariable [itcl::scope _view($tag)]
2141	bind $inner.${tag} <KeyPress-Return> \
2142	[itcl::code $this camera set ${tag}]
2143	blt::table $inner \
2144	$row,0 $inner.${tag}label -anchor e -pady 2 \
2145	$row,1 $inner.${tag} -anchor w -pady 2
2146	blt::table configure $inner r$row -resize none
2147	incr row
2148	}
2149	checkbutton $inner.ortho \
2150	-text "Orthographic Projection" \
2151	-variable [itcl::scope _view(ortho)] \
2152	-command [itcl::code $this camera set ortho] \
2153	-font "Arial 9"
2154	blt::table $inner \
2155	$row,0 $inner.ortho -columnspan 2 -anchor w -pady 2
2156	blt::table configure $inner r$row -resize none
2157	incr row
2158
2159	blt::table configure $inner c0 c1 -resize none
2160	blt::table configure $inner c2 -resize expand
2161	blt::table configure $inner r$row -resize expand
2162	}
2163
2164	itcl::body Rappture::VtkStreamlinesViewer::BuildCutplaneTab {} {
2165
2166	set fg [option get $itk_component(hull) font Font]
2167
2168	set inner [$itk_component(main) insert end \
2169	-title "Cutplane Settings" \
2170	-icon [Rappture::icon cutbutton]]
2171
2172	$inner configure -borderwidth 4
2173
2174	checkbutton $inner.visible \
2175	-text "Show Cutplanes" \
2176	-variable [itcl::scope _settings(cutplane-visible)] \
2177	-command [itcl::code $this AdjustSetting cutplane-visible] \
2178	-font "Arial 9"
2179
2180	checkbutton $inner.wireframe \
2181	-text "Show Wireframe" \
2182	-variable [itcl::scope _settings(cutplane-wireframe)] \
2183	-command [itcl::code $this AdjustSetting cutplane-wireframe] \
2184	-font "Arial 9"
2185
2186	checkbutton $inner.lighting \
2187	-text "Enable Lighting" \
2188	-variable [itcl::scope _settings(cutplane-lighting)] \
2189	-command [itcl::code $this AdjustSetting cutplane-lighting] \
2190	-font "Arial 9"
2191
2192	checkbutton $inner.edges \
2193	-text "Show Edges" \
2194	-variable [itcl::scope _settings(cutplane-edges)] \
2195	-command [itcl::code $this AdjustSetting cutplane-edges] \
2196	-font "Arial 9"
2197
2198	label $inner.opacity_l -text "Opacity" -font "Arial 9"
2199	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
2200	-variable [itcl::scope _settings(cutplane-opacity)] \
2201	-width 10 \
2202	-showvalue off \
2203	-command [itcl::code $this AdjustSetting cutplane-opacity]
2204	$inner.opacity set $_settings(cutplane-opacity)
2205
2206	# X-value slicer...
2207	itk_component add xCutButton {
2208	Rappture::PushButton $inner.xbutton \
2209	-onimage [Rappture::icon x-cutplane] \
2210	-offimage [Rappture::icon x-cutplane] \
2211	-command [itcl::code $this AdjustSetting cutplane-xvisible] \
2212	-variable [itcl::scope _settings(cutplane-xvisible)]
2213	}
2214	Rappture::Tooltip::for $itk_component(xCutButton) \
2215	"Toggle the X-axis cutplane on/off"
2216
2217	itk_component add xCutScale {
2218	::scale $inner.xval -from 100 -to 1 \
2219	-width 10 -orient vertical -showvalue yes \
2220	-borderwidth 1 -highlightthickness 0 \
2221	-command [itcl::code $this EventuallySetCutplane x] \
2222	-variable [itcl::scope _settings(cutplane-xposition)]
2223	} {
2224	usual
2225	ignore -borderwidth -highlightthickness
2226	}
2227	# Set the default cutplane value before disabling the scale.
2228	$itk_component(xCutScale) set 50
2229	$itk_component(xCutScale) configure -state disabled
2230	Rappture::Tooltip::for $itk_component(xCutScale) \
2231	"@[itcl::code $this Slice tooltip x]"
2232
2233	# Y-value slicer...
2234	itk_component add yCutButton {
2235	Rappture::PushButton $inner.ybutton \
2236	-onimage [Rappture::icon y-cutplane] \
2237	-offimage [Rappture::icon y-cutplane] \
2238	-command [itcl::code $this AdjustSetting cutplane-yvisible] \
2239	-variable [itcl::scope _settings(cutplane-yvisible)]
2240	}
2241	Rappture::Tooltip::for $itk_component(yCutButton) \
2242	"Toggle the Y-axis cutplane on/off"
2243
2244	itk_component add yCutScale {
2245	::scale $inner.yval -from 100 -to 1 \
2246	-width 10 -orient vertical -showvalue yes \
2247	-borderwidth 1 -highlightthickness 0 \
2248	-command [itcl::code $this EventuallySetCutplane y] \
2249	-variable [itcl::scope _settings(cutplane-yposition)]
2250	} {
2251	usual
2252	ignore -borderwidth -highlightthickness
2253	}
2254	Rappture::Tooltip::for $itk_component(yCutScale) \
2255	"@[itcl::code $this Slice tooltip y]"
2256	# Set the default cutplane value before disabling the scale.
2257	$itk_component(yCutScale) set 50
2258	$itk_component(yCutScale) configure -state disabled
2259
2260	# Z-value slicer...
2261	itk_component add zCutButton {
2262	Rappture::PushButton $inner.zbutton \
2263	-onimage [Rappture::icon z-cutplane] \
2264	-offimage [Rappture::icon z-cutplane] \
2265	-command [itcl::code $this AdjustSetting cutplane-zvisible] \
2266	-variable [itcl::scope _settings(cutplane-zvisible)]
2267	}
2268	Rappture::Tooltip::for $itk_component(zCutButton) \
2269	"Toggle the Z-axis cutplane on/off"
2270
2271	itk_component add zCutScale {
2272	::scale $inner.zval -from 100 -to 1 \
2273	-width 10 -orient vertical -showvalue yes \
2274	-borderwidth 1 -highlightthickness 0 \
2275	-command [itcl::code $this EventuallySetCutplane z] \
2276	-variable [itcl::scope _settings(cutplane-zposition)]
2277	} {
2278	usual
2279	ignore -borderwidth -highlightthickness
2280	}
2281	$itk_component(zCutScale) set 50
2282	$itk_component(zCutScale) configure -state disabled
2283	#$itk_component(zCutScale) configure -state disabled
2284	Rappture::Tooltip::for $itk_component(zCutScale) \
2285	"@[itcl::code $this Slice tooltip z]"
2286
2287	blt::table $inner \
2288	0,0 $inner.visible -anchor w -pady 2 -cspan 4 \
2289	1,0 $inner.lighting -anchor w -pady 2 -cspan 4 \
2290	2,0 $inner.wireframe -anchor w -pady 2 -cspan 4 \
2291	3,0 $inner.edges -anchor w -pady 2 -cspan 4 \
2292	4,0 $inner.opacity_l -anchor w -pady 2 -cspan 3 \
2293	5,0 $inner.opacity -fill x -pady 2 -cspan 3 \
2294	6,0 $itk_component(xCutButton) -anchor e -padx 2 -pady 2 \
2295	7,0 $itk_component(xCutScale) -fill y \
2296	6,1 $itk_component(yCutButton) -anchor e -padx 2 -pady 2 \
2297	7,1 $itk_component(yCutScale) -fill y \
2298	6,2 $itk_component(zCutButton) -anchor e -padx 2 -pady 2 \
2299	7,2 $itk_component(zCutScale) -fill y \
2300
2301	blt::table configure $inner r* c* -resize none
2302	blt::table configure $inner r7 c3 -resize expand
2303	}
2304
2305
2306
2307	#
2308	# camera --
2309	#
2310	itcl::body Rappture::VtkStreamlinesViewer::camera {option args} {
2311	switch -- $option {
2312	"show" {
2313	puts [array get _view]
2314	}
2315	"set" {
2316	set who [lindex $args 0]
2317	set x $_view($who)
2318	set code [catch { string is double $x } result]
2319	if { $code != 0 \|\| !$result } {
2320	return
2321	}
2322	switch -- $who {
2323	"ortho" {
2324	if {$_view(ortho)} {
2325	SendCmd "camera mode ortho"
2326	} else {
2327	SendCmd "camera mode persp"
2328	}
2329	}
2330	"xpan" - "ypan" {
2331	PanCamera
2332	}
2333	"qx" - "qy" - "qz" - "qw" {
2334	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2335	$_arcball quaternion $q
2336	EventuallyRotate $q
2337	}
2338	"zoom" {
2339	SendCmd "camera zoom $_view(zoom)"
2340	}
2341	}
2342	}
2343	}
2344	}
2345
2346	itcl::body Rappture::VtkStreamlinesViewer::ConvertToVtkData { dataobj comp } {
2347	foreach { x1 x2 xN y1 y2 yN } [$dataobj mesh $comp] break
2348	set values [$dataobj values $comp]
2349	append out "# vtk DataFile Version 2.0 \n"
2350	append out "Test data \n"
2351	append out "ASCII \n"
2352	append out "DATASET STRUCTURED_POINTS \n"
2353	append out "DIMENSIONS $xN $yN 1 \n"
2354	append out "ORIGIN 0 0 0 \n"
2355	append out "SPACING 1 1 1 \n"
2356	append out "POINT_DATA [expr $xN * $yN] \n"
2357	append out "SCALARS field float 1 \n"
2358	append out "LOOKUP_TABLE default \n"
2359	append out [join $values "\n"]
2360	append out "\n"
2361	return $out
2362	}
2363
2364
2365	itcl::body Rappture::VtkStreamlinesViewer::GetVtkData { args } {
2366	set bytes ""
2367	foreach dataobj [get] {
2368	foreach comp [$dataobj components] {
2369	set tag $dataobj-$comp
2370	#set contents [ConvertToVtkData $dataobj $comp]
2371	set contents [$dataobj blob $comp]
2372	append bytes "$contents\n\n"
2373	}
2374	}
2375	return [list .vtk $bytes]
2376	}
2377
2378	itcl::body Rappture::VtkStreamlinesViewer::GetImage { args } {
2379	if { [image width $_image(download)] > 0 &&
2380	[image height $_image(download)] > 0 } {
2381	set bytes [$_image(download) data -format "jpeg -quality 100"]
2382	set bytes [Rappture::encoding::decode -as b64 $bytes]
2383	return [list .jpg $bytes]
2384	}
2385	return ""
2386	}
2387
2388	itcl::body Rappture::VtkStreamlinesViewer::BuildDownloadPopup { popup command } {
2389	Rappture::Balloon $popup \
2390	-title "[Rappture::filexfer::label downloadWord] as..."
2391	set inner [$popup component inner]
2392	label $inner.summary -text "" -anchor w
2393	radiobutton $inner.vtk_button -text "VTK data file" \
2394	-variable [itcl::scope _downloadPopup(format)] \
2395	-font "Helvetica 9 " \
2396	-value vtk
2397	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
2398	radiobutton $inner.image_button -text "Image File" \
2399	-variable [itcl::scope _downloadPopup(format)] \
2400	-value image
2401	Rappture::Tooltip::for $inner.image_button \
2402	"Save as digital image."
2403
2404	button $inner.ok -text "Save" \
2405	-highlightthickness 0 -pady 2 -padx 3 \
2406	-command $command \
2407	-compound left \
2408	-image [Rappture::icon download]
2409
2410	button $inner.cancel -text "Cancel" \
2411	-highlightthickness 0 -pady 2 -padx 3 \
2412	-command [list $popup deactivate] \
2413	-compound left \
2414	-image [Rappture::icon cancel]
2415
2416	blt::table $inner \
2417	0,0 $inner.summary -cspan 2 \
2418	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2419	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2420	4,1 $inner.cancel -width .9i -fill y \
2421	4,0 $inner.ok -padx 2 -width .9i -fill y
2422	blt::table configure $inner r3 -height 4
2423	blt::table configure $inner r4 -pady 4
2424	raise $inner.image_button
2425	$inner.vtk_button invoke
2426	return $inner
2427	}
2428
2429	itcl::body Rappture::VtkStreamlinesViewer::SetObjectStyle { dataobj comp } {
2430	# Parse style string.
2431	set tag $dataobj-$comp
2432	set style [$dataobj style $comp]
2433	array set settings {
2434	-color \#808080
2435	-edges 0
2436	-edgecolor black
2437	-linewidth 1.0
2438	-opacity 0.4
2439	-wireframe 0
2440	-lighting 1
2441	-seeds 1
2442	-seedcolor white
2443	-visible 1
2444	}
2445	if { $dataobj != $_first } {
2446	set settings(-opacity) 1
2447	}
2448	array set settings $style
2449	SendCmd "streamlines add $tag"
2450	SendCmd "streamlines seed visible off $tag"
2451	set seeds [$dataobj hints seeds]
2452	if { $seeds != "" && ![info exists _seeds($dataobj)] } {
2453	set length [string length $seeds]
2454	SendCmd "streamlines seed fmesh 200 data follows $length $tag"
2455	SendCmd "$seeds"
2456	set _seeds($dataobj) 1
2457	}
2458	SendCmd "cutplane add $tag"
2459	SendCmd "cutplane colormode $_colorMode $tag"
2460	SendCmd "cutplane edges 0 $tag"
2461	SendCmd "cutplane wireframe 0 $tag"
2462	SendCmd "cutplane lighting 1 $tag"
2463	SendCmd "cutplane linewidth 1 $tag"
2464	#SendCmd "cutplane linecolor 1 1 1 $tag"
2465	#SendCmd "cutplane visible $tag"
2466	foreach axis { x y z } {
2467	SendCmd "cutplane slice $axis 1.0 $tag"
2468	SendCmd "cutplane axis $axis 0 $tag"
2469	}
2470
2471	SendCmd "polydata add $tag"
2472	SendCmd "polydata edges $settings(-edges) $tag"
2473	set _settings(volume-edges) $settings(-edges)
2474	SendCmd "polydata color [Color2RGB $settings(-color)] $tag"
2475	SendCmd "polydata lighting $settings(-lighting) $tag"
2476	set _settings(volume-lighting) $settings(-lighting)
2477	SendCmd "polydata linecolor [Color2RGB $settings(-edgecolor)] $tag"
2478	SendCmd "polydata linewidth $settings(-linewidth) $tag"
2479	SendCmd "polydata opacity $settings(-opacity) $tag"
2480	set _settings(volume-opacity) $settings(-opacity)
2481	SendCmd "polydata wireframe $settings(-wireframe) $tag"
2482	set _settings(volume-wireframe) $settings(-wireframe)
2483	set _settings(volume-opacity) [expr $settings(-opacity) * 100.0]
2484	SetColormap $dataobj $comp
2485	}
2486
2487	itcl::body Rappture::VtkStreamlinesViewer::IsValidObject { dataobj } {
2488	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2489	return 0
2490	}
2491	return 1
2492	}
2493
2494	# ----------------------------------------------------------------------
2495	# USAGE: ReceiveLegend <colormap> <title> <vmin> <vmax> <size>
2496	#
2497	# Invoked automatically whenever the "legend" command comes in from
2498	# the rendering server. Indicates that binary image data with the
2499	# specified <size> will follow.
2500	# ----------------------------------------------------------------------
2501	itcl::body Rappture::VtkStreamlinesViewer::ReceiveLegend { colormap title vmin vmax size } {
2502	#puts stderr "ReceiveLegend colormap=$colormap title=$title range=$vmin,$vmax size=$size"
2503	set _limits(vmin) $vmin
2504	set _limits(vmax) $vmax
2505	set _title $title
2506	regsub {\(mag\)} $title "" _title
2507	if { [IsConnected] } {
2508	set bytes [ReceiveBytes $size]
2509	if { ![info exists _image(legend)] } {
2510	set _image(legend) [image create photo]
2511	}
2512	$_image(legend) configure -data $bytes
2513	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2514	DrawLegend $_title
2515	}
2516	}
2517
2518	#
2519	# DrawLegend --
2520	#
2521	# Draws the legend in it's own canvas which resides to the right
2522	# of the contour plot area.
2523	#
2524	itcl::body Rappture::VtkStreamlinesViewer::DrawLegend { name } {
2525	set c $itk_component(view)
2526	set w [winfo width $c]
2527	set h [winfo height $c]
2528	set font "Arial 8"
2529	set lineht [font metrics $font -linespace]
2530
2531	if { [info exists _fields($name)] } {
2532	foreach { title units } $_fields($name) break
2533	if { $units != "" } {
2534	set title [format "%s (%s)" $title $units]
2535	}
2536	} else {
2537	set title $name
2538	}
2539	if { $_settings(legend-visible) } {
2540	set x [expr $w - 2]
2541	if { [$c find withtag "legend"] == "" } {
2542	set y 2
2543	$c create text $x $y \
2544	-anchor ne \
2545	-fill $itk_option(-plotforeground) -tags "title legend" \
2546	-font $font
2547	incr y $lineht
2548	$c create text $x $y \
2549	-anchor ne \
2550	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2551	-font $font
2552	incr y $lineht
2553	$c create image $x $y \
2554	-anchor ne \
2555	-image $_image(legend) -tags "colormap legend"
2556	$c create text $x [expr {$h-2}] \
2557	-anchor se \
2558	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2559	-font $font
2560	#$c bind colormap <Enter> [itcl::code $this EnterLegend %x %y]
2561	$c bind colormap <Leave> [itcl::code $this LeaveLegend]
2562	$c bind colormap <Motion> [itcl::code $this MotionLegend %x %y]
2563	}
2564	# Reset the item coordinates according the current size of the plot.
2565	$c itemconfigure title -text $title
2566	if { $_limits(vmin) != "" } {
2567	$c itemconfigure vmin -text [format %g $_limits(vmin)]
2568	}
2569	if { $_limits(vmax) != "" } {
2570	$c itemconfigure vmax -text [format %g $_limits(vmax)]
2571	}
2572	set y 2
2573	$c coords title $x $y
2574	incr y $lineht
2575	$c coords vmax $x $y
2576	incr y $lineht
2577	$c coords colormap $x $y
2578	$c coords vmin $x [expr {$h - 2}]
2579	}
2580	}
2581
2582	#
2583	# EnterLegend --
2584	#
2585	itcl::body Rappture::VtkStreamlinesViewer::EnterLegend { x y } {
2586	SetLegendTip $x $y
2587	}
2588
2589	#
2590	# MotionLegend --
2591	#
2592	itcl::body Rappture::VtkStreamlinesViewer::MotionLegend { x y } {
2593	Rappture::Tooltip::tooltip cancel
2594	set c $itk_component(view)
2595	SetLegendTip $x $y
2596	}
2597
2598	#
2599	# LeaveLegend --
2600	#
2601	itcl::body Rappture::VtkStreamlinesViewer::LeaveLegend { } {
2602	Rappture::Tooltip::tooltip cancel
2603	.rappturetooltip configure -icon ""
2604	}
2605
2606	#
2607	# SetLegendTip --
2608	#
2609	itcl::body Rappture::VtkStreamlinesViewer::SetLegendTip { x y } {
2610	set c $itk_component(view)
2611	set w [winfo width $c]
2612	set h [winfo height $c]
2613	set font "Arial 8"
2614	set lineht [font metrics $font -linespace]
2615
2616	set imgHeight [image height $_image(legend)]
2617	set coords [$c coords colormap]
2618	set imgX [expr $w - [image width $_image(legend)] - 2]
2619	set imgY [expr $y - 2 * ($lineht + 2)]
2620
2621	if { [info exists _fields($_title)] } {
2622	foreach { title units } $_fields($_title) break
2623	if { $units != "" } {
2624	set title [format "%s (%s)" $title $units]
2625	}
2626	} else {
2627	set title $_title
2628	}
2629	# Make a swatch of the selected color
2630	if { [catch { $_image(legend) get 10 $imgY } pixel] != 0 } {
2631	#puts stderr "out of range: $imgY"
2632	return
2633	}
2634	if { ![info exists _image(swatch)] } {
2635	set _image(swatch) [image create photo -width 24 -height 24]
2636	}
2637	set color [eval format "\#%02x%02x%02x" $pixel]
2638	$_image(swatch) put black -to 0 0 23 23
2639	$_image(swatch) put $color -to 1 1 22 22
2640	.rappturetooltip configure -icon $_image(swatch)
2641
2642	# Compute the value of the point
2643	set t [expr 1.0 - (double($imgY) / double($imgHeight-1))]
2644	set value [expr $t * ($_limits(vmax) - $_limits(vmin)) + $_limits(vmin)]
2645	set tipx [expr $x + 15]
2646	set tipy [expr $y - 5]
2647	Rappture::Tooltip::text $c "$title $value"
2648	Rappture::Tooltip::tooltip show $c +$tipx,+$tipy
2649	}
2650
2651
2652	# ----------------------------------------------------------------------
2653	# USAGE: Slice move x\|y\|z <newval>
2654	#
2655	# Called automatically when the user drags the slider to move the
2656	# cut plane that slices 3D data. Gets the current value from the
2657	# slider and moves the cut plane to the appropriate point in the
2658	# data set.
2659	# ----------------------------------------------------------------------
2660	itcl::body Rappture::VtkStreamlinesViewer::Slice {option args} {
2661	switch -- $option {
2662	"move" {
2663	set axis [lindex $args 0]
2664	set oldval $_settings(axis-${axis}position)
2665	set newval [lindex $args 1]
2666	if {[llength $args] != 2} {
2667	error "wrong # args: should be \"Slice move x\|y\|z newval\""
2668	}
2669	set newpos [expr {0.01*$newval}]
2670	SendCmd "cutplane slice $axis $newpos"
2671	}
2672	"tooltip" {
2673	set axis [lindex $args 0]
2674	set val [$itk_component(${axis}CutScale) get]
2675	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
2676	}
2677	default {
2678	error "bad option \"$option\": should be axis, move, or tooltip"
2679	}
2680	}
2681	}

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