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source: trunk/gui/scripts/vtkstreamlinesviewer.tcl @ 2632

Last change on this file since 2632 was 2632, checked in by ldelgass, 13 years ago
Write temp VTK file as binary in VtkViewer::limits
File size: 84.8 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 _obj2datasets
119	private variable _obj2ovride ; # maps dataobj => style override
120	private variable _datasets ; # contains all the dataobj-component
121	; # datasets in the server
122	private variable _colormaps ; # contains all the colormaps
123	; # in the server.
124	private variable _dataset2style ;# maps dataobj-component to transfunc
125
126	private variable _click ; # info used for rotate operations
127	private variable _limits ; # autoscale min/max for all axes
128	private variable _view ; # view params for 3D view
129	private variable _settings
130	private variable _style; # Array of current component styles.
131	private variable _initialStyle; # Array of initial component styles.
132	private variable _reset 1; # indicates if camera needs to be reset
133	# to starting position.
134
135	private variable _first "" ; # This is the topmost dataset.
136	private variable _start 0
137	private variable _buffering 0
138	private variable _title ""
139	private variable _seeds
140
141	common _downloadPopup; # download options from popup
142	private common _hardcopy
143	private variable _width 0
144	private variable _height 0
145	private variable _resizePending 0
146	private variable _reseedPending 0
147	private variable _rotatePending 0
148	private variable _cutplanePending 0
149	private variable _outline
150	private variable _vectorFields
151	private variable _scalarFields
152	private variable _fields
153	private variable _currentField ""
154	private variable _numSeeds 200
155	private variable _colorMode "vmag";# Mode of colormap (vmag or scalar)
156	}
157
158	itk::usual VtkStreamlinesViewer {
159	keep -background -foreground -cursor -font
160	keep -plotbackground -plotforeground
161	}
162
163	# ----------------------------------------------------------------------
164	# CONSTRUCTOR
165	# ----------------------------------------------------------------------
166	itcl::body Rappture::VtkStreamlinesViewer::constructor {hostlist args} {
167	# Rebuild event
168	$_dispatcher register !rebuild
169	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
170
171	# Resize event
172	$_dispatcher register !resize
173	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
174
175	# Reseed event
176	$_dispatcher register !reseed
177	$_dispatcher dispatch $this !reseed "[itcl::code $this DoReseed]; list"
178
179	# Rotate event
180	$_dispatcher register !rotate
181	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
182
183	# X-Cutplane event
184	$_dispatcher register !xcutplane
185	$_dispatcher dispatch $this !xcutplane \
186	"[itcl::code $this AdjustSetting cutplane-xposition]; list"
187
188	# Y-Cutplane event
189	$_dispatcher register !ycutplane
190	$_dispatcher dispatch $this !ycutplane \
191	"[itcl::code $this AdjustSetting cutplane-yposition]; list"
192
193	# Z-Cutplane event
194	$_dispatcher register !zcutplane
195	$_dispatcher dispatch $this !zcutplane \
196	"[itcl::code $this AdjustSetting cutplane-zposition]; list"
197
198	#
199	# Populate parser with commands handle incoming requests
200	#
201	$_parser alias image [itcl::code $this ReceiveImage]
202	$_parser alias dataset [itcl::code $this ReceiveDataset]
203	$_parser alias legend [itcl::code $this ReceiveLegend]
204
205	array set _outline {
206	id -1
207	afterId -1
208	x1 -1
209	y1 -1
210	x2 -1
211	y2 -1
212	}
213	# Initialize the view to some default parameters.
214	array set _view {
215	qw 1
216	qx 0
217	qy 0
218	qz 0
219	zoom 1.0
220	xpan 0
221	ypan 0
222	ortho 0
223	}
224	set _arcball [blt::arcball create 100 100]
225	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
226	$_arcball quaternion $q
227
228	set _limits(zmin) 0.0
229	set _limits(zmax) 1.0
230
231	array set _settings [subst {
232	axis-xgrid 0
233	axis-ygrid 0
234	axis-zgrid 0
235	axis-xcutplane 0
236	axis-ycutplane 0
237	axis-zcutplane 0
238	axis-xposition 0
239	axis-yposition 0
240	axis-zposition 0
241	axis-visible 1
242	axis-labels 1
243	cutplane-edges 0
244	cutplane-xvisible 0
245	cutplane-yvisible 0
246	cutplane-zvisible 0
247	cutplane-xposition 50
248	cutplane-yposition 50
249	cutplane-zposition 50
250	cutplane-visible 1
251	cutplane-wireframe 0
252	cutplane-opacity 100
253	volume-edges 0
254	volume-lighting 1
255	volume-opacity 40
256	volume-visible 1
257	volume-wireframe 0
258	streamlines-seeds 0
259	streamlines-visible 1
260	streamlines-opacity 100
261	streamlines-numpoints 200
262	streamlines-lighting 1
263	streamlines-scale 1
264	legend-visible 1
265	}]
266
267	itk_component add view {
268	canvas $itk_component(plotarea).view \
269	-highlightthickness 0 -borderwidth 0
270	} {
271	usual
272	ignore -highlightthickness -borderwidth -background
273	}
274
275	set c $itk_component(view)
276	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
277	bind $c <4> [itcl::code $this Zoom in 0.25]
278	bind $c <5> [itcl::code $this Zoom out 0.25]
279	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
280	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
281	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
282	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
283	bind $c <Enter> "focus %W"
284
285	# Fix the scrollregion in case we go off screen
286	$c configure -scrollregion [$c bbox all]
287
288	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
289	set _map(cwidth) -1
290	set _map(cheight) -1
291	set _map(zoom) 1.0
292	set _map(original) ""
293
294	set f [$itk_component(main) component controls]
295	itk_component add reset {
296	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
297	-highlightthickness 0 \
298	-image [Rappture::icon reset-view] \
299	-command [itcl::code $this Zoom reset]
300	} {
301	usual
302	ignore -highlightthickness
303	}
304	pack $itk_component(reset) -side top -padx 2 -pady 2
305	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
306
307	itk_component add zoomin {
308	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
309	-highlightthickness 0 \
310	-image [Rappture::icon zoom-in] \
311	-command [itcl::code $this Zoom in]
312	} {
313	usual
314	ignore -highlightthickness
315	}
316	pack $itk_component(zoomin) -side top -padx 2 -pady 2
317	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
318
319	itk_component add zoomout {
320	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
321	-highlightthickness 0 \
322	-image [Rappture::icon zoom-out] \
323	-command [itcl::code $this Zoom out]
324	} {
325	usual
326	ignore -highlightthickness
327	}
328	pack $itk_component(zoomout) -side top -padx 2 -pady 2
329	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
330
331	itk_component add volume {
332	Rappture::PushButton $f.volume \
333	-onimage [Rappture::icon volume-on] \
334	-offimage [Rappture::icon volume-off] \
335	-variable [itcl::scope _settings(volume-visible)] \
336	-command [itcl::code $this AdjustSetting volume-visible]
337	}
338	$itk_component(volume) select
339	Rappture::Tooltip::for $itk_component(volume) \
340	"Don't display the volume"
341	pack $itk_component(volume) -padx 2 -pady 2
342
343	itk_component add streamlines {
344	Rappture::PushButton $f.streamlines \
345	-onimage [Rappture::icon streamlines-on] \
346	-offimage [Rappture::icon streamlines-off] \
347	-variable [itcl::scope _settings(streamlines-visible)] \
348	-command [itcl::code $this AdjustSetting streamlines-visible] \
349	}
350	$itk_component(streamlines) select
351	Rappture::Tooltip::for $itk_component(streamlines) \
352	"Toggle the streamlines on/off"
353	pack $itk_component(streamlines) -padx 2 -pady 2
354
355	itk_component add cutplane {
356	Rappture::PushButton $f.cutplane \
357	-onimage [Rappture::icon cutbutton] \
358	-offimage [Rappture::icon cutbutton] \
359	-variable [itcl::scope _settings(cutplane-visible)] \
360	-command [itcl::code $this AdjustSetting cutplane-visible]
361	}
362	$itk_component(cutplane) select
363	Rappture::Tooltip::for $itk_component(cutplane) \
364	"Show/Hide cutplanes"
365	pack $itk_component(cutplane) -padx 2 -pady 2
366
367
368	if { [catch {
369	BuildVolumeTab
370	BuildStreamsTab
371	BuildCutplaneTab
372	BuildAxisTab
373	BuildCameraTab
374	} errs] != 0 } {
375	puts stderr errs=$errs
376	}
377	# Legend
378
379	set _image(legend) [image create photo]
380	itk_component add legend {
381	canvas $itk_component(plotarea).legend -width 50 -highlightthickness 0
382	} {
383	usual
384	ignore -highlightthickness
385	rename -background -plotbackground plotBackground Background
386	}
387
388	# Hack around the Tk panewindow. The problem is that the requested
389	# size of the 3d view isn't set until an image is retrieved from
390	# the server. So the panewindow uses the tiny size.
391	set w 10000
392	pack forget $itk_component(view)
393	blt::table $itk_component(plotarea) \
394	0,0 $itk_component(view) -fill both -reqwidth $w
395	blt::table configure $itk_component(plotarea) c1 -resize none
396
397	# Bindings for rotation via mouse
398	bind $itk_component(view) <ButtonPress-1> \
399	[itcl::code $this Rotate click %x %y]
400	bind $itk_component(view) <B1-Motion> \
401	[itcl::code $this Rotate drag %x %y]
402	bind $itk_component(view) <ButtonRelease-1> \
403	[itcl::code $this Rotate release %x %y]
404	bind $itk_component(view) <Configure> \
405	[itcl::code $this EventuallyResize %w %h]
406
407	if 0 {
408	bind $itk_component(view) <Configure> \
409	[itcl::code $this EventuallyResize %w %h]
410	}
411	# Bindings for panning via mouse
412	bind $itk_component(view) <ButtonPress-2> \
413	[itcl::code $this Pan click %x %y]
414	bind $itk_component(view) <B2-Motion> \
415	[itcl::code $this Pan drag %x %y]
416	bind $itk_component(view) <ButtonRelease-2> \
417	[itcl::code $this Pan release %x %y]
418
419	bind $itk_component(view) <ButtonRelease-3> \
420	[itcl::code $this Pick %x %y]
421
422	# Bindings for panning via keyboard
423	bind $itk_component(view) <KeyPress-Left> \
424	[itcl::code $this Pan set -10 0]
425	bind $itk_component(view) <KeyPress-Right> \
426	[itcl::code $this Pan set 10 0]
427	bind $itk_component(view) <KeyPress-Up> \
428	[itcl::code $this Pan set 0 -10]
429	bind $itk_component(view) <KeyPress-Down> \
430	[itcl::code $this Pan set 0 10]
431	bind $itk_component(view) <Shift-KeyPress-Left> \
432	[itcl::code $this Pan set -2 0]
433	bind $itk_component(view) <Shift-KeyPress-Right> \
434	[itcl::code $this Pan set 2 0]
435	bind $itk_component(view) <Shift-KeyPress-Up> \
436	[itcl::code $this Pan set 0 -2]
437	bind $itk_component(view) <Shift-KeyPress-Down> \
438	[itcl::code $this Pan set 0 2]
439
440	# Bindings for zoom via keyboard
441	bind $itk_component(view) <KeyPress-Prior> \
442	[itcl::code $this Zoom out]
443	bind $itk_component(view) <KeyPress-Next> \
444	[itcl::code $this Zoom in]
445
446	bind $itk_component(view) <Enter> "focus $itk_component(view)"
447
448	if {[string equal "x11" [tk windowingsystem]]} {
449	# Bindings for zoom via mouse
450	bind $itk_component(view) <4> [itcl::code $this Zoom out]
451	bind $itk_component(view) <5> [itcl::code $this Zoom in]
452	}
453
454	set _image(download) [image create photo]
455
456	eval itk_initialize $args
457	Connect
458	update
459	}
460
461	# ----------------------------------------------------------------------
462	# DESTRUCTOR
463	# ----------------------------------------------------------------------
464	itcl::body Rappture::VtkStreamlinesViewer::destructor {} {
465	Disconnect
466	$_dispatcher cancel !rebuild
467	$_dispatcher cancel !resize
468	$_dispatcher cancel !reseed
469	$_dispatcher cancel !rotate
470	$_dispatcher cancel !xcutplane
471	$_dispatcher cancel !ycutplane
472	$_dispatcher cancel !zcutplane
473	image delete $_image(plot)
474	image delete $_image(download)
475	catch { blt::arcball destroy $_arcball }
476	}
477
478	itcl::body Rappture::VtkStreamlinesViewer::DoResize {} {
479	if { $_width < 2 } {
480	set _width 500
481	}
482	if { $_height < 2 } {
483	set _height 500
484	}
485	set _start [clock clicks -milliseconds]
486	SendCmd "screen size $_width $_height"
487	RequestLegend
488
489	#SendCmd "imgflush"
490
491	# Must reset camera to have object scaling to take effect.
492	#SendCmd "camera reset"
493	#SendCmd "camera zoom $_view(zoom)"
494	set _resizePending 0
495	}
496
497	itcl::body Rappture::VtkStreamlinesViewer::DoRotate {} {
498	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
499	SendCmd "camera orient $q"
500	set _rotatePending 0
501	}
502
503	itcl::body Rappture::VtkStreamlinesViewer::DoReseed {} {
504	foreach dataset [CurrentDatasets -visible] {
505	foreach {dataobj comp} [split $dataset -] break
506	# This command works for either random or fmesh seeds
507	SendCmd "streamlines seed numpts $_numSeeds $dataset"
508	}
509	set _reseedPending 0
510	}
511
512	itcl::body Rappture::VtkStreamlinesViewer::EventuallyResize { w h } {
513	set _width $w
514	set _height $h
515	$_arcball resize $w $h
516	if { !$_resizePending } {
517	set _resizePending 1
518	$_dispatcher event -after 400 !resize
519	}
520	}
521
522	itcl::body Rappture::VtkStreamlinesViewer::EventuallyReseed { numPoints } {
523	set _numSeeds $numPoints
524	if { !$_reseedPending } {
525	set _reseedPending 1
526	$_dispatcher event -after 600 !reseed
527	}
528	}
529
530	set rotate_delay 100
531
532	itcl::body Rappture::VtkStreamlinesViewer::EventuallyRotate { q } {
533	foreach { _view(qw) _view(qx) _view(qy) _view(qz) } $q break
534	if { !$_rotatePending } {
535	set _rotatePending 1
536	global rotate_delay
537	$_dispatcher event -after $rotate_delay !rotate
538	}
539	}
540
541	itcl::body Rappture::VtkStreamlinesViewer::EventuallySetCutplane { axis args } {
542	if { !$_cutplanePending } {
543	set _cutplanePending 1
544	$_dispatcher event -after 100 !${axis}cutplane
545	}
546	}
547
548	# ----------------------------------------------------------------------
549	# USAGE: add <dataobj> ?<settings>?
550	#
551	# Clients use this to add a data object to the plot. The optional
552	# <settings> are used to configure the plot. Allowed settings are
553	# -color, -brightness, -width, -linestyle, and -raise.
554	# ----------------------------------------------------------------------
555	itcl::body Rappture::VtkStreamlinesViewer::add {dataobj {settings ""}} {
556	array set params {
557	-color auto
558	-width 1
559	-linestyle solid
560	-brightness 0
561	-raise 0
562	-description ""
563	-param ""
564	-type ""
565	}
566	array set params $settings
567	set params(-description) ""
568	set params(-param) ""
569	foreach {opt val} $settings {
570	if {![info exists params($opt)]} {
571	error "bad setting \"$opt\": should be [join [lsort [array names params]] {, }]"
572	}
573	set params($opt) $val
574	}
575	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
576	# can't handle -autocolors yet
577	set params(-color) black
578	}
579	set pos [lsearch -exact $dataobj $_dlist]
580	if {$pos < 0} {
581	lappend _dlist $dataobj
582	}
583	set _obj2ovride($dataobj-color) $params(-color)
584	set _obj2ovride($dataobj-width) $params(-width)
585	set _obj2ovride($dataobj-raise) $params(-raise)
586	$_dispatcher event -idle !rebuild
587	}
588
589
590	# ----------------------------------------------------------------------
591	# USAGE: delete ?<dataobj1> <dataobj2> ...?
592	#
593	# Clients use this to delete a dataobj from the plot. If no dataobjs
594	# are specified, then all dataobjs are deleted. No data objects are
595	# deleted. They are only removed from the display list.
596	#
597	# ----------------------------------------------------------------------
598	itcl::body Rappture::VtkStreamlinesViewer::delete {args} {
599	if { [llength $args] == 0} {
600	set args $_dlist
601	}
602	# Delete all specified dataobjs
603	set changed 0
604	foreach dataobj $args {
605	set pos [lsearch -exact $_dlist $dataobj]
606	if { $pos < 0 } {
607	continue; # Don't know anything about it.
608	}
609	# Remove it from the dataobj list.
610	set _dlist [lreplace $_dlist $pos $pos]
611	SendCmd "dataset visible 0"
612	array unset _obj2ovride $dataobj-*
613	array unset _settings $dataobj-*
614	# Append to the end of the dataobj list.
615	lappend _dlist $dataobj
616	set changed 1
617	}
618	# If anything changed, then rebuild the plot
619	if { $changed } {
620	$_dispatcher event -idle !rebuild
621	}
622	}
623
624	# ----------------------------------------------------------------------
625	# USAGE: get ?-objects?
626	# USAGE: get ?-visible?
627	# USAGE: get ?-image view?
628	#
629	# Clients use this to query the list of objects being plotted, in
630	# order from bottom to top of this result. The optional "-image"
631	# flag can also request the internal images being shown.
632	# ----------------------------------------------------------------------
633	itcl::body Rappture::VtkStreamlinesViewer::get {args} {
634	if {[llength $args] == 0} {
635	set args "-objects"
636	}
637
638	set op [lindex $args 0]
639	switch -- $op {
640	"-objects" {
641	# put the dataobj list in order according to -raise options
642	set dlist {}
643	foreach dataobj $_dlist {
644	if { ![IsValidObject $dataobj] } {
645	continue
646	}
647	if {[info exists _obj2ovride($dataobj-raise)] &&
648	$_obj2ovride($dataobj-raise)} {
649	set dlist [linsert $dlist 0 $dataobj]
650	} else {
651	lappend dlist $dataobj
652	}
653	}
654	return $dlist
655	}
656	"-visible" {
657	set dlist {}
658	foreach dataobj $_dlist {
659	if { ![IsValidObject $dataobj] } {
660	continue
661	}
662	if { ![info exists _obj2ovride($dataobj-raise)] } {
663	# No setting indicates that the object isn't visible.
664	continue
665	}
666	# Otherwise use the -raise parameter to put the object to
667	# the front of the list.
668	if { $_obj2ovride($dataobj-raise) } {
669	set dlist [linsert $dlist 0 $dataobj]
670	} else {
671	lappend dlist $dataobj
672	}
673	}
674	return $dlist
675	}
676	-image {
677	if {[llength $args] != 2} {
678	error "wrong # args: should be \"get -image view\""
679	}
680	switch -- [lindex $args end] {
681	view {
682	return $_image(plot)
683	}
684	default {
685	error "bad image name \"[lindex $args end]\": should be view"
686	}
687	}
688	}
689	default {
690	error "bad option \"$op\": should be -objects or -image"
691	}
692	}
693	}
694
695	# ----------------------------------------------------------------------
696	# USAGE: scale ?<data1> <data2> ...?
697	#
698	# Sets the default limits for the overall plot according to the
699	# limits of the data for all of the given <data> objects. This
700	# accounts for all objects--even those not showing on the screen.
701	# Because of this, the limits are appropriate for all objects as
702	# the user scans through data in the ResultSet viewer.
703	# ----------------------------------------------------------------------
704	itcl::body Rappture::VtkStreamlinesViewer::scale {args} {
705	array unset _limits
706	foreach dataobj $args {
707	set string [limits $dataobj]
708	if { $string == "" } {
709	continue
710	}
711	array set bounds $string
712	if {![info exists _limits(xmin)] \|\| $_limits(xmin) > $bounds(xmin)} {
713	set _limits(xmin) $bounds(xmin)
714	}
715	if {![info exists _limits(xmax)] \|\| $_limits(xmax) < $bounds(xmax)} {
716	set _limits(xmax) $bounds(xmax)
717	}
718
719	if {![info exists _limits(ymin)] \|\| $_limits(ymin) > $bounds(ymin)} {
720	set _limits(ymin) $bounds(ymin)
721	}
722	if {![info exists _limits(ymax)] \|\| $_limits(ymax) < $bounds(ymax)} {
723	set _limits(ymax) $bounds(ymax)
724	}
725
726	if {![info exists _limits(zmin)] \|\| $_limits(zmin) > $bounds(zmin)} {
727	set _limits(zmin) $bounds(zmin)
728	}
729	if {![info exists _limits(zmax)] \|\| $_limits(zmax) < $bounds(zmax)} {
730	set _limits(zmax) $bounds(zmax)
731	}
732	}
733	}
734
735	# ----------------------------------------------------------------------
736	# USAGE: download coming
737	# USAGE: download controls <downloadCommand>
738	# USAGE: download now
739	#
740	# Clients use this method to create a downloadable representation
741	# of the plot. Returns a list of the form {ext string}, where
742	# "ext" is the file extension (indicating the type of data) and
743	# "string" is the data itself.
744	# ----------------------------------------------------------------------
745	itcl::body Rappture::VtkStreamlinesViewer::download {option args} {
746	switch $option {
747	coming {
748	if {[catch {
749	blt::winop snap $itk_component(plotarea) $_image(download)
750	}]} {
751	$_image(download) configure -width 1 -height 1
752	$_image(download) put #000000
753	}
754	}
755	controls {
756	set popup .vtkviewerdownload
757	if { ![winfo exists .vtkviewerdownload] } {
758	set inner [BuildDownloadPopup $popup [lindex $args 0]]
759	} else {
760	set inner [$popup component inner]
761	}
762	set _downloadPopup(image_controls) $inner.image_frame
763	set num [llength [get]]
764	set num [expr {($num == 1) ? "1 result" : "$num results"}]
765	set word [Rappture::filexfer::label downloadWord]
766	$inner.summary configure -text "$word $num in the following format:"
767	update idletasks ;# Fix initial sizes
768	return $popup
769	}
770	now {
771	set popup .vtkviewerdownload
772	if {[winfo exists .vtkviewerdownload]} {
773	$popup deactivate
774	}
775	switch -- $_downloadPopup(format) {
776	"image" {
777	return [$this GetImage [lindex $args 0]]
778	}
779	"vtk" {
780	return [$this GetVtkData [lindex $args 0]]
781	}
782	}
783	return ""
784	}
785	default {
786	error "bad option \"$option\": should be coming, controls, now"
787	}
788	}
789	}
790
791	# ----------------------------------------------------------------------
792	# USAGE: Connect ?<host:port>,<host:port>...?
793	#
794	# Clients use this method to establish a connection to a new
795	# server, or to reestablish a connection to the previous server.
796	# Any existing connection is automatically closed.
797	# ----------------------------------------------------------------------
798	itcl::body Rappture::VtkStreamlinesViewer::Connect {} {
799	set _hosts [GetServerList "vtkvis"]
800	if { "" == $_hosts } {
801	return 0
802	}
803	set result [VisViewer::Connect $_hosts]
804	if { $result } {
805	set w [winfo width $itk_component(view)]
806	set h [winfo height $itk_component(view)]
807	EventuallyResize $w $h
808	}
809	return $result
810	}
811
812	#
813	# isconnected --
814	#
815	# Indicates if we are currently connected to the visualization server.
816	#
817	itcl::body Rappture::VtkStreamlinesViewer::isconnected {} {
818	return [VisViewer::IsConnected]
819	}
820
821	#
822	# disconnect --
823	#
824	itcl::body Rappture::VtkStreamlinesViewer::disconnect {} {
825	Disconnect
826	set _reset 1
827	}
828
829	#
830	# Disconnect --
831	#
832	# Clients use this method to disconnect from the current rendering
833	# server.
834	#
835	itcl::body Rappture::VtkStreamlinesViewer::Disconnect {} {
836	VisViewer::Disconnect
837
838	# disconnected -- no more data sitting on server
839	set _outbuf ""
840	array unset _datasets
841	array unset _data
842	array unset _colormaps
843	array unset _seeds
844	array unset _dataset2style
845	array unset _obj2datasets
846	}
847
848	#
849	# sendto --
850	#
851	itcl::body Rappture::VtkStreamlinesViewer::sendto { bytes } {
852	SendBytes "$bytes\n"
853	}
854
855	#
856	# SendCmd
857	#
858	# Send commands off to the rendering server. If we're currently
859	# sending data objects to the server, buffer the commands to be
860	# sent later.
861	#
862	itcl::body Rappture::VtkStreamlinesViewer::SendCmd {string} {
863	if { $_buffering } {
864	append _outbuf $string "\n"
865	} else {
866	SendBytes "$string\n"
867	}
868	}
869
870	# ----------------------------------------------------------------------
871	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
872	#
873	# Invoked automatically whenever the "image" command comes in from
874	# the rendering server. Indicates that binary image data with the
875	# specified <size> will follow.
876	# ----------------------------------------------------------------------
877	itcl::body Rappture::VtkStreamlinesViewer::ReceiveImage { args } {
878	array set info {
879	-token "???"
880	-bytes 0
881	-type image
882	}
883	array set info $args
884	set bytes [ReceiveBytes $info(-bytes)]
885	if { $info(-type) == "image" } {
886	if 0 {
887	set f [open "last.ppm" "w"]
888	puts $f $bytes
889	close $f
890	}
891	$_image(plot) configure -data $bytes
892	set time [clock seconds]
893	set date [clock format $time]
894	#puts stderr "$date: received image [image width $_image(plot)]x[image height $_image(plot)] image>"
895	if { $_start > 0 } {
896	set finish [clock clicks -milliseconds]
897	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
898	set _start 0
899	}
900	} elseif { $info(type) == "print" } {
901	set tag $this-print-$info(-token)
902	set _hardcopy($tag) $bytes
903	}
904	}
905
906	#
907	# ReceiveDataset --
908	#
909	itcl::body Rappture::VtkStreamlinesViewer::ReceiveDataset { args } {
910	if { ![isconnected] } {
911	return
912	}
913	set option [lindex $args 0]
914	switch -- $option {
915	"scalar" {
916	set option [lindex $args 1]
917	switch -- $option {
918	"world" {
919	foreach { x y z value tag } [lrange $args 2 end] break
920	}
921	"pixel" {
922	foreach { x y value tag } [lrange $args 2 end] break
923	}
924	}
925	}
926	"vector" {
927	set option [lindex $args 1]
928	switch -- $option {
929	"world" {
930	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
931	}
932	"pixel" {
933	foreach { x y vx vy vz tag } [lrange $args 2 end] break
934	}
935	}
936	}
937	"names" {
938	foreach { name } [lindex $args 1] {
939	#puts stderr "Dataset: $name"
940	}
941	}
942	default {
943	error "unknown dataset option \"$option\" from server"
944	}
945	}
946	}
947
948	# ----------------------------------------------------------------------
949	# USAGE: Rebuild
950	#
951	# Called automatically whenever something changes that affects the
952	# data in the widget. Clears any existing data and rebuilds the
953	# widget to display new data.
954	# ----------------------------------------------------------------------
955	itcl::body Rappture::VtkStreamlinesViewer::Rebuild {} {
956	update
957	set w [winfo width $itk_component(view)]
958	set h [winfo height $itk_component(view)]
959	if { $w < 2 \|\| $h < 2 } {
960	$_dispatcher event -idle !rebuild
961	return
962	}
963
964	# Turn on buffering of commands to the server. We don't want to
965	# be preempted by a server disconnect/reconnect (which automatically
966	# generates a new call to Rebuild).
967	set _buffering 1
968
969	set _width $w
970	set _height $h
971	$_arcball resize $w $h
972	DoResize
973	#
974	# Reset the camera and other view parameters
975	#
976	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
977	$_arcball quaternion $q
978	if {$_view(ortho)} {
979	SendCmd "camera mode ortho"
980	} else {
981	SendCmd "camera mode persp"
982	}
983	DoRotate
984	PanCamera
985	set _first ""
986	InitSettings axis-xgrid axis-ygrid axis-zgrid axis-mode \
987	axis-visible axis-labels cutplane-visible \
988	cutplane-xposition cutplane-yposition cutplane-zposition \
989	cutplane-xvisible cutplane-yvisible cutplane-zvisible
990
991	SendCmd "imgflush"
992
993	set _limits(zmin) ""
994	set _limits(zmax) ""
995	set _first ""
996	foreach dataobj [get -objects] {
997	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
998	set _first $dataobj
999	}
1000	set _obj2datasets($dataobj) ""
1001	foreach comp [$dataobj components] {
1002	set tag $dataobj-$comp
1003	if { ![info exists _datasets($tag)] } {
1004	set bytes [$dataobj blob $comp]
1005	set length [string length $bytes]
1006	append _outbuf "dataset add $tag data follows $length\n"
1007	append _outbuf $bytes
1008	set _datasets($tag) 1
1009	SetObjectStyle $dataobj $comp
1010	}
1011	lappend _obj2datasets($dataobj) $tag
1012	if { [info exists _obj2ovride($dataobj-raise)] } {
1013	SendCmd "dataset visible 1 $tag"
1014	} else {
1015	SendCmd "dataset visible 0 $tag"
1016	}
1017	}
1018	}
1019	if {"" != $_first} {
1020	set location [$_first hints camera]
1021	if { $location != "" } {
1022	array set view $location
1023	}
1024
1025	foreach axis { x y z } {
1026	set label [$_first hints ${axis}label]
1027	if { $label != "" } {
1028	SendCmd "axis name $axis $label"
1029	}
1030	set units [$_first hints ${axis}units]
1031	if { $units != "" } {
1032	SendCmd "axis units $axis $units"
1033	}
1034	}
1035	array unset _scalarFields
1036	array unset _vectorFields
1037	set _currentField [$_first hints default]
1038	$itk_component(field) choices delete 0 end
1039	array unset _fields
1040	foreach { name title units } [$_first hints vectors] {
1041	set _vectorFields($title) $name
1042	$itk_component(field) choices insert end "$name" "$title"
1043	set _fields($name) [list $title $units]
1044	}
1045	foreach { name title units } [$_first hints scalars] {
1046	set _scalarFields($title) $name
1047	$itk_component(field) choices insert end "$name" "$title"
1048	set _fields($name) [list $title $units]
1049	}
1050	$itk_component(field) value $_currentField
1051	}
1052
1053	InitSettings streamlines-visible streamlines-palette volume-visible
1054
1055	if { $_reset } {
1056	InitSettings streamlines-seeds streamlines-opacity \
1057	streamlines-numpoints streamlines-lighting \
1058	streamlines-palette streamlines-field \
1059	volume-edges volume-lighting volume-opacity volume-wireframe
1060	Zoom reset
1061	set _reset 0
1062	}
1063
1064	set _buffering 0; # Turn off buffering.
1065
1066	# Actually write the commands to the server socket. If it fails, we don't
1067	# care. We're finished here.
1068	blt::busy hold $itk_component(hull)
1069	SendBytes $_outbuf;
1070	blt::busy release $itk_component(hull)
1071	set _outbuf ""; # Clear the buffer.
1072	}
1073
1074	# ----------------------------------------------------------------------
1075	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1076	#
1077	# Returns a list of server IDs for the current datasets being displayed. This
1078	# is normally a single ID, but it might be a list of IDs if the current data
1079	# object has multiple components.
1080	# ----------------------------------------------------------------------
1081	itcl::body Rappture::VtkStreamlinesViewer::CurrentDatasets {args} {
1082	set flag [lindex $args 0]
1083	switch -- $flag {
1084	"-all" {
1085	if { [llength $args] > 1 } {
1086	error "CurrentDatasets: can't specify dataobj after \"-all\""
1087	}
1088	set dlist [get -objects]
1089	}
1090	"-visible" {
1091	if { [llength $args] > 1 } {
1092	set dlist {}
1093	set args [lrange $args 1 end]
1094	foreach dataobj $args {
1095	if { [info exists _obj2ovride($dataobj-raise)] } {
1096	lappend dlist $dataobj
1097	}
1098	}
1099	} else {
1100	set dlist [get -visible]
1101	}
1102	}
1103	default {
1104	set dlist $args
1105	}
1106	}
1107	set rlist ""
1108	foreach dataobj $dlist {
1109	foreach comp [$dataobj components] {
1110	set tag $dataobj-$comp
1111	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1112	lappend rlist $tag
1113	}
1114	}
1115	}
1116	return $rlist
1117	}
1118
1119	# ----------------------------------------------------------------------
1120	# USAGE: Zoom in
1121	# USAGE: Zoom out
1122	# USAGE: Zoom reset
1123	#
1124	# Called automatically when the user clicks on one of the zoom
1125	# controls for this widget. Changes the zoom for the current view.
1126	# ----------------------------------------------------------------------
1127	itcl::body Rappture::VtkStreamlinesViewer::Zoom {option} {
1128	switch -- $option {
1129	"in" {
1130	set _view(zoom) [expr {$_view(zoom)*1.25}]
1131	SendCmd "camera zoom $_view(zoom)"
1132	}
1133	"out" {
1134	set _view(zoom) [expr {$_view(zoom)*0.8}]
1135	SendCmd "camera zoom $_view(zoom)"
1136	}
1137	"reset" {
1138	array set _view {
1139	qw 1
1140	qx 0
1141	qy 0
1142	qz 0
1143	zoom 1.0
1144	xpan 0
1145	ypan 0
1146	}
1147	SendCmd "camera reset all"
1148	if { $_first != "" } {
1149	set location [$_first hints camera]
1150	if { $location != "" } {
1151	array set _view $location
1152	}
1153	}
1154	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1155	$_arcball quaternion $q
1156	DoRotate
1157	}
1158	}
1159	}
1160
1161	itcl::body Rappture::VtkStreamlinesViewer::PanCamera {} {
1162	set x $_view(xpan)
1163	set y $_view(ypan)
1164	SendCmd "camera pan $x $y"
1165	}
1166
1167
1168	# ----------------------------------------------------------------------
1169	# USAGE: Rotate click <x> <y>
1170	# USAGE: Rotate drag <x> <y>
1171	# USAGE: Rotate release <x> <y>
1172	#
1173	# Called automatically when the user clicks/drags/releases in the
1174	# plot area. Moves the plot according to the user's actions.
1175	# ----------------------------------------------------------------------
1176	itcl::body Rappture::VtkStreamlinesViewer::Rotate {option x y} {
1177	switch -- $option {
1178	"click" {
1179	$itk_component(view) configure -cursor fleur
1180	set _click(x) $x
1181	set _click(y) $y
1182	}
1183	"drag" {
1184	if {[array size _click] == 0} {
1185	Rotate click $x $y
1186	} else {
1187	set w [winfo width $itk_component(view)]
1188	set h [winfo height $itk_component(view)]
1189	if {$w <= 0 \|\| $h <= 0} {
1190	return
1191	}
1192
1193	if {[catch {
1194	# this fails sometimes for no apparent reason
1195	set dx [expr {double($x-$_click(x))/$w}]
1196	set dy [expr {double($y-$_click(y))/$h}]
1197	}]} {
1198	return
1199	}
1200	if { $dx == 0 && $dy == 0 } {
1201	return
1202	}
1203	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1204	EventuallyRotate $q
1205	set _click(x) $x
1206	set _click(y) $y
1207	}
1208	}
1209	"release" {
1210	Rotate drag $x $y
1211	$itk_component(view) configure -cursor ""
1212	catch {unset _click}
1213	}
1214	default {
1215	error "bad option \"$option\": should be click, drag, release"
1216	}
1217	}
1218	}
1219
1220	itcl::body Rappture::VtkStreamlinesViewer::Pick {x y} {
1221	foreach tag [CurrentDatasets -visible] {
1222	SendCmd "dataset getscalar pixel $x $y $tag"
1223	}
1224	}
1225
1226	# ----------------------------------------------------------------------
1227	# USAGE: $this Pan click x y
1228	# $this Pan drag x y
1229	# $this Pan release x y
1230	#
1231	# Called automatically when the user clicks on one of the zoom
1232	# controls for this widget. Changes the zoom for the current view.
1233	# ----------------------------------------------------------------------
1234	itcl::body Rappture::VtkStreamlinesViewer::Pan {option x y} {
1235	switch -- $option {
1236	"set" {
1237	set w [winfo width $itk_component(view)]
1238	set h [winfo height $itk_component(view)]
1239	set x [expr $x / double($w)]
1240	set y [expr $y / double($h)]
1241	set _view(xpan) [expr $_view(xpan) + $x]
1242	set _view(ypan) [expr $_view(ypan) + $y]
1243	PanCamera
1244	return
1245	}
1246	"click" {
1247	set _click(x) $x
1248	set _click(y) $y
1249	$itk_component(view) configure -cursor hand1
1250	}
1251	"drag" {
1252	if { ![info exists _click(x)] } {
1253	set _click(x) $x
1254	}
1255	if { ![info exists _click(y)] } {
1256	set _click(y) $y
1257	}
1258	set w [winfo width $itk_component(view)]
1259	set h [winfo height $itk_component(view)]
1260	set dx [expr ($_click(x) - $x)/double($w)]
1261	set dy [expr ($_click(y) - $y)/double($h)]
1262	set _click(x) $x
1263	set _click(y) $y
1264	set _view(xpan) [expr $_view(xpan) - $dx]
1265	set _view(ypan) [expr $_view(ypan) - $dy]
1266	PanCamera
1267	}
1268	"release" {
1269	Pan drag $x $y
1270	$itk_component(view) configure -cursor ""
1271	}
1272	default {
1273	error "unknown option \"$option\": should set, click, drag, or release"
1274	}
1275	}
1276	}
1277
1278	# ----------------------------------------------------------------------
1279	# USAGE: InitSettings <what> ?<value>?
1280	#
1281	# Used internally to update rendering settings whenever parameters
1282	# change in the popup settings panel. Sends the new settings off
1283	# to the back end.
1284	# ----------------------------------------------------------------------
1285	itcl::body Rappture::VtkStreamlinesViewer::InitSettings { args } {
1286	foreach spec $args {
1287	if { [info exists _settings($_first-$spec)] } {
1288	# Reset global setting with dataobj specific setting
1289	set _settings($spec) $_settings($_first-$spec)
1290	}
1291	AdjustSetting $spec
1292	}
1293	}
1294
1295	#
1296	# AdjustSetting --
1297	#
1298	# Changes/updates a specific setting in the widget. There are
1299	# usually user-setable option. Commands are sent to the render
1300	# server.
1301	#
1302	itcl::body Rappture::VtkStreamlinesViewer::AdjustSetting {what {value ""}} {
1303	if { ![isconnected] } {
1304	return
1305	}
1306	switch -- $what {
1307	"volume-opacity" {
1308	set val $_settings(volume-opacity)
1309	set sval [expr { 0.01 * double($val) }]
1310	foreach dataset [CurrentDatasets -visible] {
1311	SendCmd "polydata opacity $sval $dataset"
1312	}
1313	}
1314	"volume-wireframe" {
1315	set bool $_settings(volume-wireframe)
1316	foreach dataset [CurrentDatasets -visible] {
1317	SendCmd "polydata wireframe $bool $dataset"
1318	}
1319	}
1320	"volume-visible" {
1321	set bool $_settings(volume-visible)
1322	foreach dataset [CurrentDatasets -visible] {
1323	SendCmd "polydata visible $bool $dataset"
1324	}
1325	if { $bool } {
1326	Rappture::Tooltip::for $itk_component(volume) \
1327	"Hide the volume"
1328	} else {
1329	Rappture::Tooltip::for $itk_component(volume) \
1330	"Show the volume"
1331	}
1332	}
1333	"volume-lighting" {
1334	set bool $_settings(volume-lighting)
1335	foreach dataset [CurrentDatasets -visible] {
1336	SendCmd "polydata lighting $bool $dataset"
1337	}
1338	}
1339	"volume-edges" {
1340	set bool $_settings(volume-edges)
1341	foreach dataset [CurrentDatasets -visible] {
1342	SendCmd "polydata edges $bool $dataset"
1343	}
1344	}
1345	"axis-visible" {
1346	set bool $_settings(axis-visible)
1347	SendCmd "axis visible all $bool"
1348	}
1349	"axis-labels" {
1350	set bool $_settings(axis-labels)
1351	SendCmd "axis labels all $bool"
1352	}
1353	"axis-xgrid" - "axis-ygrid" - "axis-zgrid" {
1354	set axis [string range $what 5 5]
1355	set bool $_settings($what)
1356	SendCmd "axis grid $axis $bool"
1357	}
1358	"axis-mode" {
1359	set mode [$itk_component(axismode) value]
1360	set mode [$itk_component(axismode) translate $mode]
1361	set _settings($what) $mode
1362	SendCmd "axis flymode $mode"
1363	}
1364	"cutplane-edges" {
1365	set bool $_settings($what)
1366	foreach dataset [CurrentDatasets -visible] {
1367	SendCmd "cutplane edges $bool $dataset"
1368	}
1369	}
1370	"cutplane-visible" {
1371	set bool $_settings($what)
1372	foreach dataset [CurrentDatasets -visible] {
1373	SendCmd "cutplane visible $bool $dataset"
1374	}
1375	}
1376	"cutplane-wireframe" {
1377	set bool $_settings($what)
1378	foreach dataset [CurrentDatasets -visible] {
1379	SendCmd "cutplane wireframe $bool $dataset"
1380	}
1381	}
1382	"cutplane-lighting" {
1383	set bool $_settings($what)
1384	foreach dataset [CurrentDatasets -visible] {
1385	SendCmd "cutplane lighting $bool $dataset"
1386	}
1387	}
1388	"cutplane-opacity" {
1389	set val $_settings($what)
1390	set sval [expr { 0.01 * double($val) }]
1391	foreach dataset [CurrentDatasets -visible] {
1392	SendCmd "cutplane opacity $sval $dataset"
1393	}
1394	}
1395	"cutplane-xvisible" - "cutplane-yvisible" - "cutplane-zvisible" {
1396	set axis [string range $what 9 9]
1397	set bool $_settings($what)
1398	if { $bool } {
1399	$itk_component(${axis}CutScale) configure -state normal \
1400	-troughcolor white
1401	} else {
1402	$itk_component(${axis}CutScale) configure -state disabled \
1403	-troughcolor grey82
1404	}
1405	SendCmd "cutplane axis $axis $bool"
1406	}
1407	"cutplane-xposition" - "cutplane-yposition" - "cutplane-zposition" {
1408	set axis [string range $what 9 9]
1409	set pos [expr $_settings($what) * 0.01]
1410	SendCmd "cutplane slice ${axis} ${pos}"
1411	set _cutplanePending 0
1412	}
1413	"streamlines-seeds" {
1414	set bool $_settings($what)
1415	foreach dataset [CurrentDatasets -visible] {
1416	SendCmd "streamlines seed visible $bool $dataset"
1417	}
1418	}
1419	"streamlines-numpoints" {
1420	set density $_settings($what)
1421	EventuallyReseed $density
1422	}
1423	"streamlines-visible" {
1424	set bool $_settings($what)
1425	foreach dataset [CurrentDatasets -visible] {
1426	SendCmd "streamlines visible $bool $dataset"
1427	}
1428	if { $bool } {
1429	Rappture::Tooltip::for $itk_component(streamlines) \
1430	"Hide the streamlines"
1431	} else {
1432	Rappture::Tooltip::for $itk_component(streamlines) \
1433	"Show the streamlines"
1434	}
1435	}
1436	"streamlines-mode" {
1437	set mode [$itk_component(streammode) value]
1438	set _settings(streamlines-mode) $mode
1439	foreach dataset [CurrentDatasets -visible] {
1440	switch -- $mode {
1441	"lines" {
1442	SendCmd "streamlines lines $dataset"
1443	}
1444	"ribbons" {
1445	SendCmd "streamlines ribbons 3 0 $dataset"
1446	}
1447	"tubes" {
1448	SendCmd "streamlines tubes 5 3 $dataset"
1449	}
1450	}
1451	}
1452	}
1453	"streamlines-palette" {
1454	set palette [$itk_component(palette) value]
1455	set _settings(streamlines-palette) $palette
1456	foreach dataset [CurrentDatasets -visible $_first] {
1457	foreach {dataobj comp} [split $dataset -] break
1458	ChangeColormap $dataobj $comp $palette
1459	}
1460	RequestLegend
1461	}
1462	"streamlines-opacity" {
1463	set val $_settings(streamlines-opacity)
1464	set sval [expr { 0.01 * double($val) }]
1465	foreach dataset [CurrentDatasets -visible $_first] {
1466	SendCmd "streamlines opacity $sval $dataset"
1467	}
1468	}
1469	"streamlines-scale" {
1470	set val $_settings(streamlines-scale)
1471	set sval [expr { 0.01 * double($val) }]
1472	foreach dataset [CurrentDatasets -visible $_first] {
1473	SendCmd "streamlines scale $sval $sval $sval $dataset"
1474	}
1475	}
1476	"streamlines-lighting" {
1477	set bool $_settings(streamlines-lighting)
1478	foreach dataset [CurrentDatasets -visible $_first] {
1479	SendCmd "streamlines lighting $bool $dataset"
1480	}
1481	}
1482	"streamlines-field" {
1483	set new [$itk_component(field) value]
1484	set value [$itk_component(field) translate $new]
1485	set _settings(streamlines-field) $value
1486	if { [info exists _scalarFields($new)] } {
1487	set name $_scalarFields($new)
1488	set _colorMode scalar
1489	set _currentField $new
1490	} elseif { [info exists _vectorFields($new)] } {
1491	set name $_vectorFields($new)
1492	set _colorMode vmag
1493	set _currentField $new
1494	} else {
1495	puts stderr "unknown field \"$new\""
1496	return
1497	}
1498	foreach dataset [CurrentDatasets -visible] {
1499	SendCmd "streamlines colormode $_colorMode ${name} $dataset"
1500	SendCmd "cutplane colormode $_colorMode ${name} $dataset"
1501	}
1502	RequestLegend
1503	}
1504	default {
1505	error "don't know how to fix $what"
1506	}
1507	}
1508	}
1509
1510	#
1511	# RequestLegend --
1512	#
1513	# Request a new legend from the server. The size of the legend
1514	# is determined from the height of the canvas. It will be rotated
1515	# to be vertical when drawn.
1516	#
1517	itcl::body Rappture::VtkStreamlinesViewer::RequestLegend {} {
1518	set font "Arial 8"
1519	set lineht [font metrics $font -linespace]
1520	set c $itk_component(legend)
1521	set w 12
1522	set h [expr {$_height - 3 * ($lineht + 2)}]
1523	if { $h < 1} {
1524	return
1525	}
1526	if { [info exists _scalarFields($_currentField)] } {
1527	set name $_scalarFields($_currentField)
1528	} elseif { [info exists _vectorFields($_currentField)] } {
1529	set name $_vectorFields($_currentField)
1530	} else {
1531	return
1532	}
1533	# Set the legend on the first streamlines dataset.
1534	foreach dataset [CurrentDatasets -visible $_first] {
1535	foreach {dataobj comp} [split $dataset -] break
1536	if { [info exists _dataset2style($dataset)] } {
1537	SendCmd "legend $_dataset2style($dataset) $_colorMode $name {} $w $h 0"
1538	break;
1539	}
1540	}
1541	}
1542
1543	#
1544	# ChangeColormap --
1545	#
1546	itcl::body Rappture::VtkStreamlinesViewer::ChangeColormap {dataobj comp color} {
1547	set tag $dataobj-$comp
1548	if { ![info exist _style($tag)] } {
1549	error "no initial colormap"
1550	}
1551	array set style $_style($tag)
1552	set style(-color) $color
1553	set _style($tag) [array get style]
1554	SetColormap $dataobj $comp
1555	}
1556
1557	#
1558	# SetColormap --
1559	#
1560	itcl::body Rappture::VtkStreamlinesViewer::SetColormap { dataobj comp } {
1561	array set style {
1562	-color BGYOR
1563	-levels 6
1564	-opacity 1.0
1565	}
1566	set tag $dataobj-$comp
1567	if { ![info exists _initialStyle($tag)] } {
1568	# Save the initial component style.
1569	set _initialStyle($tag) [$dataobj style $comp]
1570	}
1571
1572	# Override defaults with initial style defined in xml.
1573	array set style $_initialStyle($tag)
1574
1575	if { ![info exists _style($tag)] } {
1576	set _style($tag) [array get style]
1577	}
1578	# Override initial style with current style.
1579	array set style $_style($tag)
1580
1581	set name "$style(-color):$style(-levels):$style(-opacity)"
1582	if { ![info exists _colormaps($name)] } {
1583	BuildColormap $name [array get style]
1584	set _colormaps($name) 1
1585	}
1586	if { ![info exists _dataset2style($tag)] \|\|
1587	$_dataset2style($tag) != $name } {
1588	SendCmd "streamlines colormap $name $tag"
1589	SendCmd "cutplane colormap $name $tag"
1590	set _dataset2style($tag) $name
1591	}
1592	}
1593
1594	itcl::body Rappture::VtkStreamlinesViewer::ColorsToColormap { colors } {
1595	switch -- $colors {
1596	"grey-to-blue" {
1597	return {
1598	0.0 0.200 0.200 0.200
1599	0.14285714285714285 0.400 0.400 0.400
1600	0.2857142857142857 0.600 0.600 0.600
1601	0.42857142857142855 0.900 0.900 0.900
1602	0.5714285714285714 0.800 1.000 1.000
1603	0.7142857142857143 0.600 1.000 1.000
1604	0.8571428571428571 0.400 0.900 1.000
1605	1.0 0.000 0.600 0.800
1606	}
1607	}
1608	"blue-to-grey" {
1609	return {
1610	0.0 0.000 0.600 0.800
1611	0.14285714285714285 0.400 0.900 1.000
1612	0.2857142857142857 0.600 1.000 1.000
1613	0.42857142857142855 0.800 1.000 1.000
1614	0.5714285714285714 0.900 0.900 0.900
1615	0.7142857142857143 0.600 0.600 0.600
1616	0.8571428571428571 0.400 0.400 0.400
1617	1.0 0.200 0.200 0.200
1618	}
1619	}
1620	"blue" {
1621	return {
1622	0.0 0.900 1.000 1.000
1623	0.1111111111111111 0.800 0.983 1.000
1624	0.2222222222222222 0.700 0.950 1.000
1625	0.3333333333333333 0.600 0.900 1.000
1626	0.4444444444444444 0.500 0.833 1.000
1627	0.5555555555555556 0.400 0.750 1.000
1628	0.6666666666666666 0.300 0.650 1.000
1629	0.7777777777777778 0.200 0.533 1.000
1630	0.8888888888888888 0.100 0.400 1.000
1631	1.0 0.000 0.250 1.000
1632	}
1633	}
1634	"brown-to-blue" {
1635	return {
1636	0.0 0.200 0.100 0.000
1637	0.09090909090909091 0.400 0.187 0.000
1638	0.18181818181818182 0.600 0.379 0.210
1639	0.2727272727272727 0.800 0.608 0.480
1640	0.36363636363636365 0.850 0.688 0.595
1641	0.45454545454545453 0.950 0.855 0.808
1642	0.5454545454545454 0.800 0.993 1.000
1643	0.6363636363636364 0.600 0.973 1.000
1644	0.7272727272727273 0.400 0.940 1.000
1645	0.8181818181818182 0.200 0.893 1.000
1646	0.9090909090909091 0.000 0.667 0.800
1647	1.0 0.000 0.480 0.600
1648	}
1649	}
1650	"blue-to-brown" {
1651	return {
1652	0.0 0.000 0.480 0.600
1653	0.09090909090909091 0.000 0.667 0.800
1654	0.18181818181818182 0.200 0.893 1.000
1655	0.2727272727272727 0.400 0.940 1.000
1656	0.36363636363636365 0.600 0.973 1.000
1657	0.45454545454545453 0.800 0.993 1.000
1658	0.5454545454545454 0.950 0.855 0.808
1659	0.6363636363636364 0.850 0.688 0.595
1660	0.7272727272727273 0.800 0.608 0.480
1661	0.8181818181818182 0.600 0.379 0.210
1662	0.9090909090909091 0.400 0.187 0.000
1663	1.0 0.200 0.100 0.000
1664	}
1665	}
1666	"blue-to-orange" {
1667	return {
1668	0.0 0.000 0.167 1.000
1669	0.09090909090909091 0.100 0.400 1.000
1670	0.18181818181818182 0.200 0.600 1.000
1671	0.2727272727272727 0.400 0.800 1.000
1672	0.36363636363636365 0.600 0.933 1.000
1673	0.45454545454545453 0.800 1.000 1.000
1674	0.5454545454545454 1.000 1.000 0.800
1675	0.6363636363636364 1.000 0.933 0.600
1676	0.7272727272727273 1.000 0.800 0.400
1677	0.8181818181818182 1.000 0.600 0.200
1678	0.9090909090909091 1.000 0.400 0.100
1679	1.0 1.000 0.167 0.000
1680	}
1681	}
1682	"orange-to-blue" {
1683	return {
1684	0.0 1.000 0.167 0.000
1685	0.09090909090909091 1.000 0.400 0.100
1686	0.18181818181818182 1.000 0.600 0.200
1687	0.2727272727272727 1.000 0.800 0.400
1688	0.36363636363636365 1.000 0.933 0.600
1689	0.45454545454545453 1.000 1.000 0.800
1690	0.5454545454545454 0.800 1.000 1.000
1691	0.6363636363636364 0.600 0.933 1.000
1692	0.7272727272727273 0.400 0.800 1.000
1693	0.8181818181818182 0.200 0.600 1.000
1694	0.9090909090909091 0.100 0.400 1.000
1695	1.0 0.000 0.167 1.000
1696	}
1697	}
1698	"rainbow" {
1699	set clist {
1700	"#EE82EE"
1701	"#4B0082"
1702	"blue"
1703	"#008000"
1704	"yellow"
1705	"#FFA500"
1706	"red"
1707	}
1708	}
1709	"BGYOR" {
1710	set clist {
1711	"blue"
1712	"#008000"
1713	"yellow"
1714	"#FFA500"
1715	"red"
1716	}
1717	}
1718	"ROYGB" {
1719	set clist {
1720	"red"
1721	"#FFA500"
1722	"yellow"
1723	"#008000"
1724	"blue"
1725	}
1726	}
1727	"RYGCB" {
1728	set clist {
1729	"red"
1730	"yellow"
1731	"green"
1732	"cyan"
1733	"blue"
1734	}
1735	}
1736	"BCGYR" {
1737	set clist {
1738	"blue"
1739	"cyan"
1740	"green"
1741	"yellow"
1742	"red"
1743	}
1744	}
1745	"spectral" {
1746	return {
1747	0.0 0.150 0.300 1.000
1748	0.1 0.250 0.630 1.000
1749	0.2 0.450 0.850 1.000
1750	0.3 0.670 0.970 1.000
1751	0.4 0.880 1.000 1.000
1752	0.5 1.000 1.000 0.750
1753	0.6 1.000 0.880 0.600
1754	0.7 1.000 0.680 0.450
1755	0.8 0.970 0.430 0.370
1756	0.9 0.850 0.150 0.196
1757	1.0 0.650 0.000 0.130
1758	}
1759	}
1760	"green-to-magenta" {
1761	return {
1762	0.0 0.000 0.316 0.000
1763	0.06666666666666667 0.000 0.526 0.000
1764	0.13333333333333333 0.000 0.737 0.000
1765	0.2 0.000 0.947 0.000
1766	0.26666666666666666 0.316 1.000 0.316
1767	0.3333333333333333 0.526 1.000 0.526
1768	0.4 0.737 1.000 0.737
1769	0.4666666666666667 1.000 1.000 1.000
1770	0.5333333333333333 1.000 0.947 1.000
1771	0.6 1.000 0.737 1.000
1772	0.6666666666666666 1.000 0.526 1.000
1773	0.7333333333333333 1.000 0.316 1.000
1774	0.8 0.947 0.000 0.947
1775	0.8666666666666667 0.737 0.000 0.737
1776	0.9333333333333333 0.526 0.000 0.526
1777	1.0 0.316 0.000 0.316
1778	}
1779	}
1780	"greyscale" {
1781	return {
1782	0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0
1783	}
1784	}
1785	"nanohub" {
1786	set clist "white yellow green cyan blue magenta"
1787	}
1788	default {
1789	set clist $colors
1790	}
1791	}
1792	set cmap {}
1793	for {set i 0} {$i < [llength $clist]} {incr i} {
1794	set x [expr {double($i)/([llength $clist]-1)}]
1795	set color [lindex $clist $i]
1796	append cmap "$x [Color2RGB $color] "
1797	}
1798	return $cmap
1799	}
1800
1801	#
1802	# BuildColormap --
1803	#
1804	itcl::body Rappture::VtkStreamlinesViewer::BuildColormap { name styles } {
1805	array set style $styles
1806	set cmap [ColorsToColormap $style(-color)]
1807	if { [llength $cmap] == 0 } {
1808	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
1809	}
1810	if { ![info exists _settings(volume-opacity)] } {
1811	set _settings(volume-opacity) $style(-opacity)
1812	}
1813	set max $_settings(volume-opacity)
1814
1815	set wmap "0.0 1.0 1.0 1.0"
1816	SendCmd "colormap add $name { $cmap } { $wmap }"
1817	}
1818
1819	# ----------------------------------------------------------------------
1820	# CONFIGURATION OPTION: -plotbackground
1821	# ----------------------------------------------------------------------
1822	itcl::configbody Rappture::VtkStreamlinesViewer::plotbackground {
1823	if { [isconnected] } {
1824	foreach {r g b} [Color2RGB $itk_option(-plotbackground)] break
1825	SendCmd "screen bgcolor $r $g $b"
1826	}
1827	}
1828
1829	# ----------------------------------------------------------------------
1830	# CONFIGURATION OPTION: -plotforeground
1831	# ----------------------------------------------------------------------
1832	itcl::configbody Rappture::VtkStreamlinesViewer::plotforeground {
1833	if { [isconnected] } {
1834	foreach {r g b} [Color2RGB $itk_option(-plotforeground)] break
1835	#fix this!
1836	#SendCmd "color background $r $g $b"
1837	}
1838	}
1839
1840	itcl::body Rappture::VtkStreamlinesViewer::limits { dataobj } {
1841	return
1842	array unset _limits $dataobj-*
1843	foreach comp [$dataobj components] {
1844	set tag $dataobj-$comp
1845	if { ![info exists _limits($tag)] } {
1846	set data [$dataobj blob $comp]
1847	set tmpfile file[pid].vtk
1848	set f [open "$tmpfile" "w"]
1849	fconfigure $f -translation binary -encoding binary
1850	puts $f $data
1851	close $f
1852	set reader [vtkDataSetReader $tag-xvtkDataSetReader]
1853	$reader SetFileName $tmpfile
1854	$reader ReadAllScalarsOn
1855	$reader ReadAllVectorsOn
1856	$reader ReadAllFieldsOn
1857	$reader Update
1858	set output [$reader GetOutput]
1859	set _limits($tag) [$output GetBounds]
1860	set pointData [$output GetPointData]
1861	puts stderr "\#scalars=[$reader GetNumberOfScalarsInFile]"
1862	puts stderr "\#fielddata=[$reader GetNumberOfFieldDataInFile]"
1863	puts stderr "fielddataname=[$reader GetFieldDataNameInFile 0]"
1864	set fieldData [$output GetFieldData]
1865	set pointData [$output GetPointData]
1866	puts stderr "field \#arrays=[$fieldData GetNumberOfArrays]"
1867	for { set i 0 } { $i < [$fieldData GetNumberOfArrays] } { incr i } {
1868	puts stderr [$fieldData GetArrayName $i]
1869	}
1870	puts stderr "point \#arrays=[$pointData GetNumberOfArrays]"
1871	for { set i 0 } { $i < [$pointData GetNumberOfArrays] } { incr i } {
1872	set name [$pointData GetArrayName $i]
1873	if { ![info exists _fields($name)] } {
1874	$itk_component(field) choices insert end "$name" "$name"
1875	set _fields($name) 1
1876	}
1877	}
1878	puts stderr "field \#components=[$fieldData GetNumberOfComponents]"
1879	puts stderr "point \#components=[$pointData GetNumberOfComponents]"
1880	puts stderr "field \#tuples=[$fieldData GetNumberOfTuples]"
1881	puts stderr "point \#tuples=[$pointData GetNumberOfTuples]"
1882	puts stderr "point \#scalars=[$pointData GetScalars]"
1883	puts stderr vectors=[$pointData GetVectors]
1884	rename $output ""
1885	rename $reader ""
1886	file delete $tmpfile
1887	}
1888	foreach { xMin xMax yMin yMax zMin zMax} $_limits($tag) break
1889	if {![info exists limits(xmin)] \|\| $limits(xmin) > $xMin} {
1890	set limits(xmin) $xMin
1891	}
1892	if {![info exists limits(xmax)] \|\| $limits(xmax) < $xMax} {
1893	set limits(xmax) $xMax
1894	}
1895	if {![info exists limits(ymin)] \|\| $limits(ymin) > $yMin} {
1896	set limits(ymin) $xMin
1897	}
1898	if {![info exists limits(ymax)] \|\| $limits(ymax) < $yMax} {
1899	set limits(ymax) $yMax
1900	}
1901	if {![info exists limits(zmin)] \|\| $limits(zmin) > $zMin} {
1902	set limits(zmin) $zMin
1903	}
1904	if {![info exists limits(zmax)] \|\| $limits(zmax) < $zMax} {
1905	set limits(zmax) $zMax
1906	}
1907	}
1908	return [array get limits]
1909	}
1910
1911	itcl::body Rappture::VtkStreamlinesViewer::BuildVolumeTab {} {
1912
1913	set fg [option get $itk_component(hull) font Font]
1914	#set bfg [option get $itk_component(hull) boldFont Font]
1915
1916	set inner [$itk_component(main) insert end \
1917	-title "Volume Settings" \
1918	-icon [Rappture::icon volume-on]]
1919	$inner configure -borderwidth 4
1920
1921	checkbutton $inner.volume \
1922	-text "Show Volume" \
1923	-variable [itcl::scope _settings(volume-visible)] \
1924	-command [itcl::code $this AdjustSetting volume-visible] \
1925	-font "Arial 9"
1926
1927	checkbutton $inner.wireframe \
1928	-text "Show Wireframe" \
1929	-variable [itcl::scope _settings(volume-wireframe)] \
1930	-command [itcl::code $this AdjustSetting volume-wireframe] \
1931	-font "Arial 9"
1932
1933	checkbutton $inner.lighting \
1934	-text "Enable Lighting" \
1935	-variable [itcl::scope _settings(volume-lighting)] \
1936	-command [itcl::code $this AdjustSetting volume-lighting] \
1937	-font "Arial 9"
1938
1939	checkbutton $inner.edges \
1940	-text "Show Edges" \
1941	-variable [itcl::scope _settings(volume-edges)] \
1942	-command [itcl::code $this AdjustSetting volume-edges] \
1943	-font "Arial 9"
1944
1945	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1946	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1947	-variable [itcl::scope _settings(volume-opacity)] \
1948	-width 10 \
1949	-showvalue off \
1950	-command [itcl::code $this AdjustSetting volume-opacity]
1951
1952	blt::table $inner \
1953	0,0 $inner.volume -anchor w -pady 2 \
1954	1,0 $inner.wireframe -anchor w -pady 2 \
1955	2,0 $inner.lighting -anchor w -pady 2 \
1956	3,0 $inner.edges -anchor w -pady 2 \
1957	4,0 $inner.opacity_l -anchor w -pady 2 \
1958	5,0 $inner.opacity -fill x -pady 2
1959
1960	blt::table configure $inner r* c* -resize none
1961	blt::table configure $inner r6 c1 -resize expand
1962	}
1963
1964
1965	itcl::body Rappture::VtkStreamlinesViewer::BuildStreamsTab {} {
1966
1967	set fg [option get $itk_component(hull) font Font]
1968	#set bfg [option get $itk_component(hull) boldFont Font]
1969
1970	set inner [$itk_component(main) insert end \
1971	-title "Streams Settings" \
1972	-icon [Rappture::icon streamlines-on]]
1973	$inner configure -borderwidth 4
1974
1975	checkbutton $inner.streamlines \
1976	-text "Show Streamlines" \
1977	-variable [itcl::scope _settings(streamlines-visible)] \
1978	-command [itcl::code $this AdjustSetting streamlines-visible] \
1979	-font "Arial 9"
1980
1981	checkbutton $inner.lighting \
1982	-text "Enable Lighting" \
1983	-variable [itcl::scope _settings(streamlines-lighting)] \
1984	-command [itcl::code $this AdjustSetting streamlines-lighting] \
1985	-font "Arial 9"
1986
1987	checkbutton $inner.seeds \
1988	-text "Show Seeds" \
1989	-variable [itcl::scope _settings(streamlines-seeds)] \
1990	-command [itcl::code $this AdjustSetting streamlines-seeds] \
1991	-font "Arial 9"
1992
1993	label $inner.mode_l -text "Mode" -font "Arial 9"
1994	itk_component add streammode {
1995	Rappture::Combobox $inner.mode -width 10 -editable no
1996	}
1997	$inner.mode choices insert end \
1998	"lines" "lines" \
1999	"ribbons" "ribbons" \
2000	"tubes" "tubes"
2001	$itk_component(streammode) value "lines"
2002	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting streamlines-mode]
2003
2004	label $inner.opacity_l -text "Opacity" -font "Arial 9"
2005	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
2006	-variable [itcl::scope _settings(streamlines-opacity)] \
2007	-width 10 \
2008	-showvalue off \
2009	-command [itcl::code $this AdjustSetting streamlines-opacity]
2010
2011	label $inner.density_l -text "Number of Seeds" -font "Arial 9"
2012	::scale $inner.density -from 1 -to 1000 -orient horizontal \
2013	-variable [itcl::scope _settings(streamlines-numpoints)] \
2014	-width 10 \
2015	-showvalue on \
2016	-command [itcl::code $this AdjustSetting streamlines-numpoints]
2017
2018	label $inner.scale_l -text "Scale" -font "Arial 9"
2019	::scale $inner.scale -from 1 -to 100 -orient horizontal \
2020	-variable [itcl::scope _settings(streamlines-scale)] \
2021	-width 10 \
2022	-showvalue off \
2023	-command [itcl::code $this AdjustSetting streamlines-scale]
2024
2025	label $inner.field_l -text "Field" -font "Arial 9"
2026	itk_component add field {
2027	Rappture::Combobox $inner.field -width 10 -editable no
2028	}
2029	bind $inner.field <<Value>> \
2030	[itcl::code $this AdjustSetting streamlines-field]
2031
2032	label $inner.palette_l -text "Palette" -font "Arial 9"
2033	itk_component add palette {
2034	Rappture::Combobox $inner.palette -width 10 -editable no
2035	}
2036	$inner.palette choices insert end \
2037	"BCGYR" "BCGYR" \
2038	"BGYOR" "BGYOR" \
2039	"blue" "blue" \
2040	"blue-to-brown" "blue-to-brown" \
2041	"blue-to-orange" "blue-to-orange" \
2042	"blue-to-grey" "blue-to-grey" \
2043	"green-to-magenta" "green-to-magenta" \
2044	"greyscale" "greyscale" \
2045	"nanohub" "nanohub" \
2046	"rainbow" "rainbow" \
2047	"spectral" "spectral" \
2048	"ROYGB" "ROYGB" \
2049	"RYGCB" "RYGCB" \
2050	"brown-to-blue" "brown-to-blue" \
2051	"grey-to-blue" "grey-to-blue" \
2052	"orange-to-blue" "orange-to-blue"
2053
2054	$itk_component(palette) value "BCGYR"
2055	bind $inner.palette <<Value>> \
2056	[itcl::code $this AdjustSetting streamlines-palette]
2057
2058	blt::table $inner \
2059	0,0 $inner.streamlines -anchor w -pady 2 -cspan 2 \
2060	1,0 $inner.lighting -anchor w -pady 2 -cspan 2 \
2061	2,0 $inner.seeds -anchor w -pady 2 -cspan 2 \
2062	3,0 $inner.density_l -anchor w -pady 2 -cspan 2 \
2063	4,0 $inner.density -fill x -pady 2 -cspan 2 \
2064	5,0 $inner.mode_l -anchor w -pady 2 \
2065	5,1 $inner.mode -anchor w -pady 2 \
2066	6,0 $inner.opacity_l -anchor w -pady 2 -cspan 2 \
2067	7,0 $inner.opacity -fill x -pady 2 -cspan 2 \
2068	8,0 $inner.field_l -anchor w -pady 2 \
2069	8,1 $inner.field -anchor w -pady 2 \
2070	9,0 $inner.palette_l -anchor w -pady 2 \
2071	9,1 $inner.palette -anchor w -pady 2 \
2072
2073
2074	blt::table configure $inner r* c* -resize none
2075	blt::table configure $inner r10 c1 c2 -resize expand
2076	}
2077
2078	itcl::body Rappture::VtkStreamlinesViewer::BuildAxisTab {} {
2079
2080	set fg [option get $itk_component(hull) font Font]
2081	#set bfg [option get $itk_component(hull) boldFont Font]
2082
2083	set inner [$itk_component(main) insert end \
2084	-title "Axis Settings" \
2085	-icon [Rappture::icon axis1]]
2086	$inner configure -borderwidth 4
2087
2088	checkbutton $inner.visible \
2089	-text "Show Axes" \
2090	-variable [itcl::scope _settings(axis-visible)] \
2091	-command [itcl::code $this AdjustSetting axis-visible] \
2092	-font "Arial 9"
2093
2094	checkbutton $inner.labels \
2095	-text "Show Axis Labels" \
2096	-variable [itcl::scope _settings(axis-labels)] \
2097	-command [itcl::code $this AdjustSetting axis-labels] \
2098	-font "Arial 9"
2099
2100	checkbutton $inner.gridx \
2101	-text "Show X Grid" \
2102	-variable [itcl::scope _settings(axis-xgrid)] \
2103	-command [itcl::code $this AdjustSetting axis-xgrid] \
2104	-font "Arial 9"
2105	checkbutton $inner.gridy \
2106	-text "Show Y Grid" \
2107	-variable [itcl::scope _settings(axis-ygrid)] \
2108	-command [itcl::code $this AdjustSetting axis-ygrid] \
2109	-font "Arial 9"
2110	checkbutton $inner.gridz \
2111	-text "Show Z Grid" \
2112	-variable [itcl::scope _settings(axis-zgrid)] \
2113	-command [itcl::code $this AdjustSetting axis-zgrid] \
2114	-font "Arial 9"
2115
2116	label $inner.mode_l -text "Mode" -font "Arial 9"
2117
2118	itk_component add axismode {
2119	Rappture::Combobox $inner.mode -width 10 -editable no
2120	}
2121	$inner.mode choices insert end \
2122	"static_triad" "static" \
2123	"closest_triad" "closest" \
2124	"furthest_triad" "furthest" \
2125	"outer_edges" "outer"
2126	$itk_component(axismode) value "static"
2127	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting axis-mode]
2128
2129	blt::table $inner \
2130	0,0 $inner.visible -anchor w -cspan 2 \
2131	1,0 $inner.labels -anchor w -cspan 2 \
2132	2,0 $inner.gridx -anchor w -cspan 2 \
2133	3,0 $inner.gridy -anchor w -cspan 2 \
2134	4,0 $inner.gridz -anchor w -cspan 2 \
2135	5,0 $inner.mode_l -anchor w -cspan 2 -padx { 2 0 } \
2136	6,0 $inner.mode -fill x -cspan 2
2137
2138	blt::table configure $inner r* c* -resize none
2139	blt::table configure $inner r7 c1 -resize expand
2140	}
2141
2142
2143	itcl::body Rappture::VtkStreamlinesViewer::BuildCameraTab {} {
2144	set inner [$itk_component(main) insert end \
2145	-title "Camera Settings" \
2146	-icon [Rappture::icon camera]]
2147	$inner configure -borderwidth 4
2148
2149	set labels { qx qy qz qw xpan ypan zoom }
2150	set row 0
2151	foreach tag $labels {
2152	label $inner.${tag}label -text $tag -font "Arial 9"
2153	entry $inner.${tag} -font "Arial 9" -bg white \
2154	-textvariable [itcl::scope _view($tag)]
2155	bind $inner.${tag} <KeyPress-Return> \
2156	[itcl::code $this camera set ${tag}]
2157	blt::table $inner \
2158	$row,0 $inner.${tag}label -anchor e -pady 2 \
2159	$row,1 $inner.${tag} -anchor w -pady 2
2160	blt::table configure $inner r$row -resize none
2161	incr row
2162	}
2163	checkbutton $inner.ortho \
2164	-text "Orthographic Projection" \
2165	-variable [itcl::scope _view(ortho)] \
2166	-command [itcl::code $this camera set ortho] \
2167	-font "Arial 9"
2168	blt::table $inner \
2169	$row,0 $inner.ortho -columnspan 2 -anchor w -pady 2
2170	blt::table configure $inner r$row -resize none
2171	incr row
2172
2173	blt::table configure $inner c0 c1 -resize none
2174	blt::table configure $inner c2 -resize expand
2175	blt::table configure $inner r$row -resize expand
2176	}
2177
2178	itcl::body Rappture::VtkStreamlinesViewer::BuildCutplaneTab {} {
2179
2180	set fg [option get $itk_component(hull) font Font]
2181
2182	set inner [$itk_component(main) insert end \
2183	-title "Cutplane Settings" \
2184	-icon [Rappture::icon cutbutton]]
2185
2186	$inner configure -borderwidth 4
2187
2188	checkbutton $inner.visible \
2189	-text "Show Cutplanes" \
2190	-variable [itcl::scope _settings(cutplane-visible)] \
2191	-command [itcl::code $this AdjustSetting cutplane-visible] \
2192	-font "Arial 9"
2193
2194	checkbutton $inner.wireframe \
2195	-text "Show Wireframe" \
2196	-variable [itcl::scope _settings(cutplane-wireframe)] \
2197	-command [itcl::code $this AdjustSetting cutplane-wireframe] \
2198	-font "Arial 9"
2199
2200	checkbutton $inner.lighting \
2201	-text "Enable Lighting" \
2202	-variable [itcl::scope _settings(cutplane-lighting)] \
2203	-command [itcl::code $this AdjustSetting cutplane-lighting] \
2204	-font "Arial 9"
2205
2206	checkbutton $inner.edges \
2207	-text "Show Edges" \
2208	-variable [itcl::scope _settings(cutplane-edges)] \
2209	-command [itcl::code $this AdjustSetting cutplane-edges] \
2210	-font "Arial 9"
2211
2212	label $inner.opacity_l -text "Opacity" -font "Arial 9"
2213	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
2214	-variable [itcl::scope _settings(cutplane-opacity)] \
2215	-width 10 \
2216	-showvalue off \
2217	-command [itcl::code $this AdjustSetting cutplane-opacity]
2218	$inner.opacity set $_settings(cutplane-opacity)
2219
2220	# X-value slicer...
2221	itk_component add xCutButton {
2222	Rappture::PushButton $inner.xbutton \
2223	-onimage [Rappture::icon x-cutplane] \
2224	-offimage [Rappture::icon x-cutplane] \
2225	-command [itcl::code $this AdjustSetting cutplane-xvisible] \
2226	-variable [itcl::scope _settings(cutplane-xvisible)]
2227	}
2228	Rappture::Tooltip::for $itk_component(xCutButton) \
2229	"Toggle the X-axis cutplane on/off"
2230
2231	itk_component add xCutScale {
2232	::scale $inner.xval -from 100 -to 1 \
2233	-width 10 -orient vertical -showvalue yes \
2234	-borderwidth 1 -highlightthickness 0 \
2235	-command [itcl::code $this EventuallySetCutplane x] \
2236	-variable [itcl::scope _settings(cutplane-xposition)]
2237	} {
2238	usual
2239	ignore -borderwidth -highlightthickness
2240	}
2241	# Set the default cutplane value before disabling the scale.
2242	$itk_component(xCutScale) set 50
2243	$itk_component(xCutScale) configure -state disabled
2244	Rappture::Tooltip::for $itk_component(xCutScale) \
2245	"@[itcl::code $this Slice tooltip x]"
2246
2247	# Y-value slicer...
2248	itk_component add yCutButton {
2249	Rappture::PushButton $inner.ybutton \
2250	-onimage [Rappture::icon y-cutplane] \
2251	-offimage [Rappture::icon y-cutplane] \
2252	-command [itcl::code $this AdjustSetting cutplane-yvisible] \
2253	-variable [itcl::scope _settings(cutplane-yvisible)]
2254	}
2255	Rappture::Tooltip::for $itk_component(yCutButton) \
2256	"Toggle the Y-axis cutplane on/off"
2257
2258	itk_component add yCutScale {
2259	::scale $inner.yval -from 100 -to 1 \
2260	-width 10 -orient vertical -showvalue yes \
2261	-borderwidth 1 -highlightthickness 0 \
2262	-command [itcl::code $this EventuallySetCutplane y] \
2263	-variable [itcl::scope _settings(cutplane-yposition)]
2264	} {
2265	usual
2266	ignore -borderwidth -highlightthickness
2267	}
2268	Rappture::Tooltip::for $itk_component(yCutScale) \
2269	"@[itcl::code $this Slice tooltip y]"
2270	# Set the default cutplane value before disabling the scale.
2271	$itk_component(yCutScale) set 50
2272	$itk_component(yCutScale) configure -state disabled
2273
2274	# Z-value slicer...
2275	itk_component add zCutButton {
2276	Rappture::PushButton $inner.zbutton \
2277	-onimage [Rappture::icon z-cutplane] \
2278	-offimage [Rappture::icon z-cutplane] \
2279	-command [itcl::code $this AdjustSetting cutplane-zvisible] \
2280	-variable [itcl::scope _settings(cutplane-zvisible)]
2281	}
2282	Rappture::Tooltip::for $itk_component(zCutButton) \
2283	"Toggle the Z-axis cutplane on/off"
2284
2285	itk_component add zCutScale {
2286	::scale $inner.zval -from 100 -to 1 \
2287	-width 10 -orient vertical -showvalue yes \
2288	-borderwidth 1 -highlightthickness 0 \
2289	-command [itcl::code $this EventuallySetCutplane z] \
2290	-variable [itcl::scope _settings(cutplane-zposition)]
2291	} {
2292	usual
2293	ignore -borderwidth -highlightthickness
2294	}
2295	$itk_component(zCutScale) set 50
2296	$itk_component(zCutScale) configure -state disabled
2297	#$itk_component(zCutScale) configure -state disabled
2298	Rappture::Tooltip::for $itk_component(zCutScale) \
2299	"@[itcl::code $this Slice tooltip z]"
2300
2301	blt::table $inner \
2302	0,0 $inner.visible -anchor w -pady 2 -cspan 4 \
2303	1,0 $inner.lighting -anchor w -pady 2 -cspan 4 \
2304	2,0 $inner.wireframe -anchor w -pady 2 -cspan 4 \
2305	3,0 $inner.edges -anchor w -pady 2 -cspan 4 \
2306	4,0 $inner.opacity_l -anchor w -pady 2 -cspan 3 \
2307	5,0 $inner.opacity -fill x -pady 2 -cspan 3 \
2308	6,0 $itk_component(xCutButton) -anchor e -padx 2 -pady 2 \
2309	7,0 $itk_component(xCutScale) -fill y \
2310	6,1 $itk_component(yCutButton) -anchor e -padx 2 -pady 2 \
2311	7,1 $itk_component(yCutScale) -fill y \
2312	6,2 $itk_component(zCutButton) -anchor e -padx 2 -pady 2 \
2313	7,2 $itk_component(zCutScale) -fill y \
2314
2315	blt::table configure $inner r* c* -resize none
2316	blt::table configure $inner r7 c3 -resize expand
2317	}
2318
2319
2320
2321	#
2322	# camera --
2323	#
2324	itcl::body Rappture::VtkStreamlinesViewer::camera {option args} {
2325	switch -- $option {
2326	"show" {
2327	puts [array get _view]
2328	}
2329	"set" {
2330	set who [lindex $args 0]
2331	set x $_view($who)
2332	set code [catch { string is double $x } result]
2333	if { $code != 0 \|\| !$result } {
2334	return
2335	}
2336	switch -- $who {
2337	"ortho" {
2338	if {$_view(ortho)} {
2339	SendCmd "camera mode ortho"
2340	} else {
2341	SendCmd "camera mode persp"
2342	}
2343	}
2344	"xpan" - "ypan" {
2345	PanCamera
2346	}
2347	"qx" - "qy" - "qz" - "qw" {
2348	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2349	$_arcball quaternion $q
2350	EventuallyRotate $q
2351	}
2352	"zoom" {
2353	SendCmd "camera zoom $_view(zoom)"
2354	}
2355	}
2356	}
2357	}
2358	}
2359
2360	itcl::body Rappture::VtkStreamlinesViewer::ConvertToVtkData { dataobj comp } {
2361	foreach { x1 x2 xN y1 y2 yN } [$dataobj mesh $comp] break
2362	set values [$dataobj values $comp]
2363	append out "# vtk DataFile Version 2.0 \n"
2364	append out "Test data \n"
2365	append out "ASCII \n"
2366	append out "DATASET STRUCTURED_POINTS \n"
2367	append out "DIMENSIONS $xN $yN 1 \n"
2368	append out "ORIGIN 0 0 0 \n"
2369	append out "SPACING 1 1 1 \n"
2370	append out "POINT_DATA [expr $xN * $yN] \n"
2371	append out "SCALARS field float 1 \n"
2372	append out "LOOKUP_TABLE default \n"
2373	append out [join $values "\n"]
2374	append out "\n"
2375	return $out
2376	}
2377
2378
2379	itcl::body Rappture::VtkStreamlinesViewer::GetVtkData { args } {
2380	set bytes ""
2381	foreach dataobj [get] {
2382	foreach comp [$dataobj components] {
2383	set tag $dataobj-$comp
2384	#set contents [ConvertToVtkData $dataobj $comp]
2385	set contents [$dataobj blob $comp]
2386	append bytes "$contents\n\n"
2387	}
2388	}
2389	return [list .vtk $bytes]
2390	}
2391
2392	itcl::body Rappture::VtkStreamlinesViewer::GetImage { args } {
2393	if { [image width $_image(download)] > 0 &&
2394	[image height $_image(download)] > 0 } {
2395	set bytes [$_image(download) data -format "jpeg -quality 100"]
2396	set bytes [Rappture::encoding::decode -as b64 $bytes]
2397	return [list .jpg $bytes]
2398	}
2399	return ""
2400	}
2401
2402	itcl::body Rappture::VtkStreamlinesViewer::BuildDownloadPopup { popup command } {
2403	Rappture::Balloon $popup \
2404	-title "[Rappture::filexfer::label downloadWord] as..."
2405	set inner [$popup component inner]
2406	label $inner.summary -text "" -anchor w
2407	radiobutton $inner.vtk_button -text "VTK data file" \
2408	-variable [itcl::scope _downloadPopup(format)] \
2409	-font "Helvetica 9 " \
2410	-value vtk
2411	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
2412	radiobutton $inner.image_button -text "Image File" \
2413	-variable [itcl::scope _downloadPopup(format)] \
2414	-value image
2415	Rappture::Tooltip::for $inner.image_button \
2416	"Save as digital image."
2417
2418	button $inner.ok -text "Save" \
2419	-highlightthickness 0 -pady 2 -padx 3 \
2420	-command $command \
2421	-compound left \
2422	-image [Rappture::icon download]
2423
2424	button $inner.cancel -text "Cancel" \
2425	-highlightthickness 0 -pady 2 -padx 3 \
2426	-command [list $popup deactivate] \
2427	-compound left \
2428	-image [Rappture::icon cancel]
2429
2430	blt::table $inner \
2431	0,0 $inner.summary -cspan 2 \
2432	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2433	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2434	4,1 $inner.cancel -width .9i -fill y \
2435	4,0 $inner.ok -padx 2 -width .9i -fill y
2436	blt::table configure $inner r3 -height 4
2437	blt::table configure $inner r4 -pady 4
2438	raise $inner.image_button
2439	$inner.vtk_button invoke
2440	return $inner
2441	}
2442
2443	itcl::body Rappture::VtkStreamlinesViewer::SetObjectStyle { dataobj comp } {
2444	# Parse style string.
2445	set tag $dataobj-$comp
2446	set style [$dataobj style $comp]
2447	array set settings {
2448	-color \#808080
2449	-edges 0
2450	-edgecolor black
2451	-linewidth 1.0
2452	-opacity 0.4
2453	-wireframe 0
2454	-lighting 1
2455	-seeds 1
2456	-seedcolor white
2457	-visible 1
2458	}
2459	if { $dataobj != $_first } {
2460	set settings(-opacity) 1
2461	}
2462	array set settings $style
2463	SendCmd "streamlines add $tag"
2464	SendCmd "streamlines seed visible off $tag"
2465	set seeds [$dataobj hints seeds]
2466	if { $seeds != "" && ![info exists _seeds($dataobj)] } {
2467	set length [string length $seeds]
2468	SendCmd "streamlines seed fmesh 200 data follows $length $tag"
2469	SendCmd "$seeds"
2470	set _seeds($dataobj) 1
2471	}
2472	SendCmd "cutplane add $tag"
2473	SendCmd "cutplane edges 0 $tag"
2474	SendCmd "cutplane wireframe 0 $tag"
2475	SendCmd "cutplane lighting 1 $tag"
2476	SendCmd "cutplane linewidth 1 $tag"
2477	#SendCmd "cutplane linecolor 1 1 1 $tag"
2478	#SendCmd "cutplane visible $tag"
2479	foreach axis { x y z } {
2480	SendCmd "cutplane slice $axis 1.0 $tag"
2481	SendCmd "cutplane axis $axis 0 $tag"
2482	}
2483
2484	SendCmd "polydata add $tag"
2485	SendCmd "polydata edges $settings(-edges) $tag"
2486	set _settings(volume-edges) $settings(-edges)
2487	SendCmd "polydata color [Color2RGB $settings(-color)] $tag"
2488	SendCmd "polydata lighting $settings(-lighting) $tag"
2489	set _settings(volume-lighting) $settings(-lighting)
2490	SendCmd "polydata linecolor [Color2RGB $settings(-edgecolor)] $tag"
2491	SendCmd "polydata linewidth $settings(-linewidth) $tag"
2492	SendCmd "polydata opacity $settings(-opacity) $tag"
2493	set _settings(volume-opacity) $settings(-opacity)
2494	SendCmd "polydata wireframe $settings(-wireframe) $tag"
2495	set _settings(volume-wireframe) $settings(-wireframe)
2496	set _settings(volume-opacity) [expr $settings(-opacity) * 100.0]
2497	SetColormap $dataobj $comp
2498	}
2499
2500	itcl::body Rappture::VtkStreamlinesViewer::IsValidObject { dataobj } {
2501	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2502	return 0
2503	}
2504	return 1
2505	}
2506
2507	# ----------------------------------------------------------------------
2508	# USAGE: ReceiveLegend <colormap> <title> <vmin> <vmax> <size>
2509	#
2510	# Invoked automatically whenever the "legend" command comes in from
2511	# the rendering server. Indicates that binary image data with the
2512	# specified <size> will follow.
2513	# ----------------------------------------------------------------------
2514	itcl::body Rappture::VtkStreamlinesViewer::ReceiveLegend { colormap title vmin vmax size } {
2515	#puts stderr "ReceiveLegend colormap=$colormap title=$title range=$vmin,$vmax size=$size"
2516	set _limits(vmin) $vmin
2517	set _limits(vmax) $vmax
2518	set _title $title
2519	regsub {\(mag\)} $title "" _title
2520	if { [IsConnected] } {
2521	set bytes [ReceiveBytes $size]
2522	if { ![info exists _image(legend)] } {
2523	set _image(legend) [image create photo]
2524	}
2525	$_image(legend) configure -data $bytes
2526	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2527	DrawLegend $_title
2528	}
2529	}
2530
2531	#
2532	# DrawLegend --
2533	#
2534	# Draws the legend in it's own canvas which resides to the right
2535	# of the contour plot area.
2536	#
2537	itcl::body Rappture::VtkStreamlinesViewer::DrawLegend { name } {
2538	set c $itk_component(view)
2539	set w [winfo width $c]
2540	set h [winfo height $c]
2541	set font "Arial 8"
2542	set lineht [font metrics $font -linespace]
2543
2544	if { [info exists _fields($name)] } {
2545	foreach { title units } $_fields($name) break
2546	if { $units != "" } {
2547	set title [format "%s (%s)" $title $units]
2548	}
2549	} else {
2550	set title $name
2551	}
2552	if { $_settings(legend-visible) } {
2553	set x [expr $w - 2]
2554	if { [$c find withtag "legend"] == "" } {
2555	set y 2
2556	$c create text $x $y \
2557	-anchor ne \
2558	-fill $itk_option(-plotforeground) -tags "title legend" \
2559	-font $font
2560	incr y $lineht
2561	$c create text $x $y \
2562	-anchor ne \
2563	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2564	-font $font
2565	incr y $lineht
2566	$c create image $x $y \
2567	-anchor ne \
2568	-image $_image(legend) -tags "colormap legend"
2569	$c create text $x [expr {$h-2}] \
2570	-anchor se \
2571	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2572	-font $font
2573	#$c bind colormap <Enter> [itcl::code $this EnterLegend %x %y]
2574	$c bind colormap <Leave> [itcl::code $this LeaveLegend]
2575	$c bind colormap <Motion> [itcl::code $this MotionLegend %x %y]
2576	}
2577	# Reset the item coordinates according the current size of the plot.
2578	$c itemconfigure title -text $title
2579	if { $_limits(vmin) != "" } {
2580	$c itemconfigure vmin -text [format %g $_limits(vmin)]
2581	}
2582	if { $_limits(vmax) != "" } {
2583	$c itemconfigure vmax -text [format %g $_limits(vmax)]
2584	}
2585	set y 2
2586	$c coords title $x $y
2587	incr y $lineht
2588	$c coords vmax $x $y
2589	incr y $lineht
2590	$c coords colormap $x $y
2591	$c coords vmin $x [expr {$h - 2}]
2592	}
2593	}
2594
2595	#
2596	# EnterLegend --
2597	#
2598	itcl::body Rappture::VtkStreamlinesViewer::EnterLegend { x y } {
2599	SetLegendTip $x $y
2600	}
2601
2602	#
2603	# MotionLegend --
2604	#
2605	itcl::body Rappture::VtkStreamlinesViewer::MotionLegend { x y } {
2606	Rappture::Tooltip::tooltip cancel
2607	set c $itk_component(view)
2608	SetLegendTip $x $y
2609	}
2610
2611	#
2612	# LeaveLegend --
2613	#
2614	itcl::body Rappture::VtkStreamlinesViewer::LeaveLegend { } {
2615	Rappture::Tooltip::tooltip cancel
2616	.rappturetooltip configure -icon ""
2617	}
2618
2619	#
2620	# SetLegendTip --
2621	#
2622	itcl::body Rappture::VtkStreamlinesViewer::SetLegendTip { x y } {
2623	set c $itk_component(view)
2624	set w [winfo width $c]
2625	set h [winfo height $c]
2626	set font "Arial 8"
2627	set lineht [font metrics $font -linespace]
2628
2629	set imgHeight [image height $_image(legend)]
2630	set coords [$c coords colormap]
2631	set imgX [expr $w - [image width $_image(legend)] - 2]
2632	set imgY [expr $y - 2 * ($lineht + 2)]
2633
2634	if { [info exists _fields($_title)] } {
2635	foreach { title units } $_fields($_title) break
2636	if { $units != "" } {
2637	set title [format "%s (%s)" $title $units]
2638	}
2639	} else {
2640	set title $_title
2641	}
2642	# Make a swatch of the selected color
2643	if { [catch { $_image(legend) get 10 $imgY } pixel] != 0 } {
2644	#puts stderr "out of range: $imgY"
2645	return
2646	}
2647	if { ![info exists _image(swatch)] } {
2648	set _image(swatch) [image create photo -width 24 -height 24]
2649	}
2650	set color [eval format "\#%02x%02x%02x" $pixel]
2651	$_image(swatch) put black -to 0 0 23 23
2652	$_image(swatch) put $color -to 1 1 22 22
2653	.rappturetooltip configure -icon $_image(swatch)
2654
2655	# Compute the value of the point
2656	if { [info exists _limits(vmax)] && [info exists _limits(vmin)] } {
2657	set t [expr 1.0 - (double($imgY) / double($imgHeight-1))]
2658	set value [expr $t * ($_limits(vmax) - $_limits(vmin)) + $_limits(vmin)]
2659	} else {
2660	set value 0.0
2661	}
2662	set tipx [expr $x + 15]
2663	set tipy [expr $y - 5]
2664	Rappture::Tooltip::text $c "$title $value"
2665	Rappture::Tooltip::tooltip show $c +$tipx,+$tipy
2666	}
2667
2668
2669	# ----------------------------------------------------------------------
2670	# USAGE: Slice move x\|y\|z <newval>
2671	#
2672	# Called automatically when the user drags the slider to move the
2673	# cut plane that slices 3D data. Gets the current value from the
2674	# slider and moves the cut plane to the appropriate point in the
2675	# data set.
2676	# ----------------------------------------------------------------------
2677	itcl::body Rappture::VtkStreamlinesViewer::Slice {option args} {
2678	switch -- $option {
2679	"move" {
2680	set axis [lindex $args 0]
2681	set oldval $_settings(axis-${axis}position)
2682	set newval [lindex $args 1]
2683	if {[llength $args] != 2} {
2684	error "wrong # args: should be \"Slice move x\|y\|z newval\""
2685	}
2686	set newpos [expr {0.01*$newval}]
2687	SendCmd "cutplane slice $axis $newpos"
2688	}
2689	"tooltip" {
2690	set axis [lindex $args 0]
2691	set val [$itk_component(${axis}CutScale) get]
2692	return "Move the [string toupper $axis] cut plane.\nCurrently: $axis = $val%"
2693	}
2694	default {
2695	error "bad option \"$option\": should be axis, move, or tooltip"
2696	}
2697	}
2698	}

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