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source: branches/1.3/gui/scripts/vtksurfaceviewer.tcl @ 4759

Last change on this file since 4759 was 4759, checked in by ldelgass, 10 years ago
merge r4756:4758 from trunk
File size: 76.9 KB

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1	# -- mode: tcl; indent-tabs-mode: nil --
2	# ----------------------------------------------------------------------
3	# COMPONENT: vtksurfaceviewer - Vtk 3D boundary surface 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) 2004-2014 HUBzero Foundation, LLC
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
18	option add *VtkSurfaceViewer.width 4i widgetDefault
19	option add VtkSurfaceViewercursor crosshair widgetDefault
20	option add *VtkSurfaceViewer.height 4i widgetDefault
21	option add *VtkSurfaceViewer.foreground black widgetDefault
22	option add *VtkSurfaceViewer.controlBackground gray widgetDefault
23	option add *VtkSurfaceViewer.controlDarkBackground #999999 widgetDefault
24	option add *VtkSurfaceViewer.plotBackground black widgetDefault
25	option add *VtkSurfaceViewer.plotForeground white widgetDefault
26	option add *VtkSurfaceViewer.font \
27	--helvetica-medium-r-normal--12-* widgetDefault
28
29	# must use this name -- plugs into Rappture::resources::load
30	proc VtkSurfaceViewer_init_resources {} {
31	Rappture::resources::register \
32	vtkvis_server Rappture::VtkSurfaceViewer::SetServerList
33	}
34
35	itcl::class Rappture::VtkSurfaceViewer {
36	inherit Rappture::VisViewer
37
38	itk_option define -plotforeground plotForeground Foreground ""
39	itk_option define -plotbackground plotBackground Background ""
40
41	constructor { hostlist args } {
42	Rappture::VisViewer::constructor $hostlist
43	} {
44	# defined below
45	}
46	destructor {
47	# defined below
48	}
49	public proc SetServerList { namelist } {
50	Rappture::VisViewer::SetServerList "vtkvis" $namelist
51	}
52	public method add {dataobj {settings ""}}
53	public method camera {option args}
54	public method delete {args}
55	public method disconnect {}
56	public method download {option args}
57	public method get {args}
58	public method isconnected {}
59	public method parameters {title args} {
60	# do nothing
61	}
62	public method scale {args}
63
64	protected method Connect {}
65	protected method CurrentDatasets {args}
66	protected method Disconnect {}
67	protected method DoResize {}
68	protected method DoRotate {}
69	protected method AdjustSetting {what {value ""}}
70	protected method InitSettings { args }
71	protected method Pan {option x y}
72	protected method Pick {x y}
73	protected method Rebuild {}
74	protected method ReceiveDataset { args }
75	protected method ReceiveImage { args }
76	protected method ReceiveLegend { colormap title vmin vmax size }
77	protected method Rotate {option x y}
78	protected method Zoom {option}
79
80	# The following methods are only used by this class.
81	private method BuildAxisTab {}
82	private method BuildCameraTab {}
83	private method BuildColormap { name }
84	private method BuildDownloadPopup { widget command }
85	private method BuildSurfaceTab {}
86	private method Combo { option }
87	private method DrawLegend {}
88	private method EnterLegend { x y }
89	private method EventuallyResize { w h }
90	private method EventuallyRotate { q }
91	private method EventuallyRequestLegend {}
92	private method GetImage { args }
93	private method GetVtkData { args }
94	private method IsValidObject { dataobj }
95	private method LeaveLegend {}
96	private method MotionLegend { x y }
97	private method PanCamera {}
98	private method RequestLegend {}
99	private method SetLegendTip { x y }
100	private method SetObjectStyle { dataobj comp }
101	private method SetCurrentColormap { color }
102	private method SetOrientation { side }
103	private method UpdateContourList {}
104
105	private variable _arcball ""
106
107	private variable _dlist "" ; # list of data objects
108	private variable _obj2datasets
109	private variable _obj2ovride ; # maps dataobj => style override
110	private variable _datasets ; # contains all the dataobj-component
111	; # datasets in the server
112	private variable _colormaps ; # contains all the colormaps
113	; # in the server.
114	# The name of the current colormap used. The colormap is global to all
115	# heightmaps displayed.
116	private variable _currentColormap ""
117	private variable _currentNumContours -1
118
119	private variable _dataset2style ;# maps dataobj-component to transfunc
120
121	private variable _click ; # info used for rotate operations
122	private variable _limits ; # autoscale min/max for all axes
123	private variable _view ; # view params for 3D view
124	private variable _settings
125	private variable _style; # Array of current component styles.
126	private variable _changed
127	private variable _initialStyle; # Array of initial component styles.
128	private variable _reset 1; # indicates if camera needs to be reset
129	# to starting position.
130
131	private variable _first "" ; # This is the topmost dataset.
132	private variable _start 0
133	private variable _title ""
134	private variable _isolines
135	private variable _contourList ""
136
137	common _downloadPopup; # download options from popup
138	private common _hardcopy
139	private variable _width 0
140	private variable _height 0
141	private variable _resizePending 0
142	private variable _rotatePending 0
143	private variable _legendPending 0
144	private variable _field ""
145	private variable _colorMode "scalar"; # Mode of colormap (vmag or scalar)
146	private variable _fieldNames {}
147	private variable _fields
148	private variable _curFldName ""
149	private variable _curFldLabel ""
150	}
151
152	itk::usual VtkSurfaceViewer {
153	keep -background -foreground -cursor -font
154	keep -plotbackground -plotforeground
155	}
156
157	# ----------------------------------------------------------------------
158	# CONSTRUCTOR
159	# ----------------------------------------------------------------------
160	itcl::body Rappture::VtkSurfaceViewer::constructor {hostlist args} {
161	package require vtk
162	set _serverType "vtkvis"
163
164	# Rebuild event
165	$_dispatcher register !rebuild
166	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
167
168	# Resize event
169	$_dispatcher register !resize
170	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
171
172	# Rotate event
173	$_dispatcher register !rotate
174	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
175
176	# Legend event
177	$_dispatcher register !legend
178	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
179
180	#
181	# Populate parser with commands handle incoming requests
182	#
183	$_parser alias image [itcl::code $this ReceiveImage]
184	$_parser alias dataset [itcl::code $this ReceiveDataset]
185	$_parser alias legend [itcl::code $this ReceiveLegend]
186
187	# Initialize the view to some default parameters.
188	array set _view {
189	qw 0.853553
190	qx -0.353553
191	qy 0.353553
192	qz 0.146447
193	zoom 1.0
194	xpan 0
195	ypan 0
196	ortho 0
197	}
198	set _arcball [blt::arcball create 100 100]
199	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
200	$_arcball quaternion $q
201
202	array set _settings {
203	-axesvisible 1
204	-axislabels 1
205	-axisminorticks 1
206	-background black
207	-colormap BCGYR
208	-colormapvisible 1
209	-field "Default"
210	-isolinecolor white
211	-isolinesvisible 0
212	-legendvisible 1
213	-numcontours 10
214	-surfaceedges 0
215	-surfacelighting 1
216	-surfaceopacity 100
217	-outline 0
218	-surfacevisible 1
219	-surfacewireframe 0
220	-xgrid 0
221	-ygrid 0
222	-zgrid 0
223	}
224	array set _changed {
225	-colormap 0
226	-numcontours 0
227	-surfaceopacity 0
228	}
229
230	itk_component add view {
231	canvas $itk_component(plotarea).view \
232	-highlightthickness 0 -borderwidth 0
233	} {
234	usual
235	ignore -highlightthickness -borderwidth -background
236	}
237
238	itk_component add fieldmenu {
239	menu $itk_component(plotarea).menu -bg black -fg white -relief flat \
240	-tearoff 0
241	} {
242	usual
243	ignore -background -foreground -relief -tearoff
244	}
245	set c $itk_component(view)
246	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
247	bind $c <4> [itcl::code $this Zoom in 0.25]
248	bind $c <5> [itcl::code $this Zoom out 0.25]
249	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
250	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
251	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
252	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
253	bind $c <Enter> "focus %W"
254	bind $c <Control-F1> [itcl::code $this ToggleConsole]
255
256	# Fix the scrollregion in case we go off screen
257	$c configure -scrollregion [$c bbox all]
258
259	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
260	set _map(cwidth) -1
261	set _map(cheight) -1
262	set _map(zoom) 1.0
263	set _map(original) ""
264
265	set f [$itk_component(main) component controls]
266	itk_component add reset {
267	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
268	-highlightthickness 0 \
269	-image [Rappture::icon reset-view] \
270	-command [itcl::code $this Zoom reset]
271	} {
272	usual
273	ignore -highlightthickness
274	}
275	pack $itk_component(reset) -side top -padx 2 -pady 2
276	Rappture::Tooltip::for $itk_component(reset) \
277	"Reset the view to the default zoom level"
278
279	itk_component add zoomin {
280	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
281	-highlightthickness 0 \
282	-image [Rappture::icon zoom-in] \
283	-command [itcl::code $this Zoom in]
284	} {
285	usual
286	ignore -highlightthickness
287	}
288	pack $itk_component(zoomin) -side top -padx 2 -pady 2
289	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
290
291	itk_component add zoomout {
292	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
293	-highlightthickness 0 \
294	-image [Rappture::icon zoom-out] \
295	-command [itcl::code $this Zoom out]
296	} {
297	usual
298	ignore -highlightthickness
299	}
300	pack $itk_component(zoomout) -side top -padx 2 -pady 2
301	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
302
303	itk_component add surface {
304	Rappture::PushButton $f.surface \
305	-onimage [Rappture::icon volume-on] \
306	-offimage [Rappture::icon volume-off] \
307	-variable [itcl::scope _settings(-surfacevisible)] \
308	-command [itcl::code $this AdjustSetting -surfacevisible]
309	}
310	$itk_component(surface) select
311	Rappture::Tooltip::for $itk_component(surface) \
312	"Don't display the surface"
313	pack $itk_component(surface) -padx 2 -pady 2
314
315	if { [catch {
316	BuildSurfaceTab
317	BuildAxisTab
318	BuildCameraTab
319	} errs] != 0 } {
320	puts stderr errs=$errs
321	}
322	# Legend
323
324	set _image(legend) [image create photo]
325	itk_component add legend {
326	canvas $itk_component(plotarea).legend -width 50 -highlightthickness 0
327	} {
328	usual
329	ignore -highlightthickness
330	rename -background -plotbackground plotBackground Background
331	}
332
333	# Hack around the Tk panewindow. The problem is that the requested
334	# size of the 3d view isn't set until an image is retrieved from
335	# the server. So the panewindow uses the tiny size.
336	set w 10000
337	pack forget $itk_component(view)
338	blt::table $itk_component(plotarea) \
339	0,0 $itk_component(view) -fill both -reqwidth $w
340	blt::table configure $itk_component(plotarea) c1 -resize none
341
342	# Bindings for rotation via mouse
343	bind $itk_component(view) <ButtonPress-1> \
344	[itcl::code $this Rotate click %x %y]
345	bind $itk_component(view) <B1-Motion> \
346	[itcl::code $this Rotate drag %x %y]
347	bind $itk_component(view) <ButtonRelease-1> \
348	[itcl::code $this Rotate release %x %y]
349
350	# Bindings for panning via mouse
351	bind $itk_component(view) <ButtonPress-2> \
352	[itcl::code $this Pan click %x %y]
353	bind $itk_component(view) <B2-Motion> \
354	[itcl::code $this Pan drag %x %y]
355	bind $itk_component(view) <ButtonRelease-2> \
356	[itcl::code $this Pan release %x %y]
357
358	#bind $itk_component(view) <ButtonRelease-3> \
359	# [itcl::code $this Pick %x %y]
360
361	# Bindings for panning via keyboard
362	bind $itk_component(view) <KeyPress-Left> \
363	[itcl::code $this Pan set -10 0]
364	bind $itk_component(view) <KeyPress-Right> \
365	[itcl::code $this Pan set 10 0]
366	bind $itk_component(view) <KeyPress-Up> \
367	[itcl::code $this Pan set 0 -10]
368	bind $itk_component(view) <KeyPress-Down> \
369	[itcl::code $this Pan set 0 10]
370	bind $itk_component(view) <Shift-KeyPress-Left> \
371	[itcl::code $this Pan set -2 0]
372	bind $itk_component(view) <Shift-KeyPress-Right> \
373	[itcl::code $this Pan set 2 0]
374	bind $itk_component(view) <Shift-KeyPress-Up> \
375	[itcl::code $this Pan set 0 -2]
376	bind $itk_component(view) <Shift-KeyPress-Down> \
377	[itcl::code $this Pan set 0 2]
378
379	# Bindings for zoom via keyboard
380	bind $itk_component(view) <KeyPress-Prior> \
381	[itcl::code $this Zoom out]
382	bind $itk_component(view) <KeyPress-Next> \
383	[itcl::code $this Zoom in]
384
385	bind $itk_component(view) <Enter> "focus $itk_component(view)"
386
387	if {[string equal "x11" [tk windowingsystem]]} {
388	# Bindings for zoom via mouse
389	bind $itk_component(view) <4> [itcl::code $this Zoom out]
390	bind $itk_component(view) <5> [itcl::code $this Zoom in]
391	}
392
393	set _image(download) [image create photo]
394
395	eval itk_initialize $args
396
397	EnableWaitDialog 500
398	Connect
399	}
400
401	# ----------------------------------------------------------------------
402	# DESTRUCTOR
403	# ----------------------------------------------------------------------
404	itcl::body Rappture::VtkSurfaceViewer::destructor {} {
405	Disconnect
406	image delete $_image(plot)
407	image delete $_image(download)
408	catch { blt::arcball destroy $_arcball }
409	}
410
411	itcl::body Rappture::VtkSurfaceViewer::DoResize {} {
412	if { $_width < 2 } {
413	set _width 500
414	}
415	if { $_height < 2 } {
416	set _height 500
417	}
418	set _start [clock clicks -milliseconds]
419	SendCmd "screen size $_width $_height"
420
421	EventuallyRequestLegend
422	set _resizePending 0
423	}
424
425	itcl::body Rappture::VtkSurfaceViewer::DoRotate {} {
426	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
427	SendCmd "camera orient $q"
428	set _rotatePending 0
429	}
430
431	itcl::body Rappture::VtkSurfaceViewer::EventuallyRequestLegend {} {
432	if { !$_legendPending } {
433	set _legendPending 1
434	$_dispatcher event -idle !legend
435	}
436	}
437
438	itcl::body Rappture::VtkSurfaceViewer::EventuallyResize { w h } {
439	set _width $w
440	set _height $h
441	$_arcball resize $w $h
442	if { !$_resizePending } {
443	set _resizePending 1
444	$_dispatcher event -after 400 !resize
445	}
446	}
447
448	set rotate_delay 100
449
450	itcl::body Rappture::VtkSurfaceViewer::EventuallyRotate { q } {
451	foreach { _view(qw) _view(qx) _view(qy) _view(qz) } $q break
452	if { !$_rotatePending } {
453	set _rotatePending 1
454	global rotate_delay
455	$_dispatcher event -after $rotate_delay !rotate
456	}
457	}
458
459	# ----------------------------------------------------------------------
460	# USAGE: add <dataobj> ?<settings>?
461	#
462	# Clients use this to add a data object to the plot. The optional
463	# <settings> are used to configure the plot. Allowed settings are
464	# -color, -brightness, -width, -linestyle, and -raise.
465	# ----------------------------------------------------------------------
466	itcl::body Rappture::VtkSurfaceViewer::add {dataobj {settings ""}} {
467	if { ![$dataobj isvalid] } {
468	return; # Object doesn't contain valid data.
469	}
470	array set params {
471	-color auto
472	-width 1
473	-linestyle solid
474	-brightness 0
475	-raise 0
476	-description ""
477	-param ""
478	-type ""
479	}
480	array set params $settings
481	set params(-description) ""
482	set params(-param) ""
483	array set params $settings
484
485	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
486	# can't handle -autocolors yet
487	set params(-color) black
488	}
489	set pos [lsearch -exact $_dlist $dataobj]
490	if {$pos < 0} {
491	lappend _dlist $dataobj
492	}
493	set _obj2ovride($dataobj-color) $params(-color)
494	set _obj2ovride($dataobj-width) $params(-width)
495	set _obj2ovride($dataobj-raise) $params(-raise)
496	$_dispatcher event -idle !rebuild
497	}
498
499
500	# ----------------------------------------------------------------------
501	# USAGE: delete ?<dataobj1> <dataobj2> ...?
502	#
503	# Clients use this to delete a dataobj from the plot. If no dataobjs
504	# are specified, then all dataobjs are deleted. No data objects are
505	# deleted. They are only removed from the display list.
506	#
507	# ----------------------------------------------------------------------
508	itcl::body Rappture::VtkSurfaceViewer::delete {args} {
509	if { [llength $args] == 0} {
510	set args $_dlist
511	}
512	# Delete all specified dataobjs
513	set changed 0
514	foreach dataobj $args {
515	set pos [lsearch -exact $_dlist $dataobj]
516	if { $pos < 0 } {
517	continue; # Don't know anything about it.
518	}
519	# Remove it from the dataobj list.
520	set _dlist [lreplace $_dlist $pos $pos]
521	array unset _obj2ovride $dataobj-*
522	array unset _settings $dataobj-*
523	set changed 1
524	}
525	# If anything changed, then rebuild the plot
526	if { $changed } {
527	$_dispatcher event -idle !rebuild
528	}
529	}
530
531	# ----------------------------------------------------------------------
532	# USAGE: get ?-objects?
533	# USAGE: get ?-visible?
534	# USAGE: get ?-image view?
535	#
536	# Clients use this to query the list of objects being plotted, in
537	# order from bottom to top of this result. The optional "-image"
538	# flag can also request the internal images being shown.
539	# ----------------------------------------------------------------------
540	itcl::body Rappture::VtkSurfaceViewer::get {args} {
541	if {[llength $args] == 0} {
542	set args "-objects"
543	}
544
545	set op [lindex $args 0]
546	switch -- $op {
547	"-objects" {
548	# put the dataobj list in order according to -raise options
549	set dlist {}
550	foreach dataobj $_dlist {
551	if { ![IsValidObject $dataobj] } {
552	continue
553	}
554	if {[info exists _obj2ovride($dataobj-raise)] &&
555	$_obj2ovride($dataobj-raise)} {
556	set dlist [linsert $dlist 0 $dataobj]
557	} else {
558	lappend dlist $dataobj
559	}
560	}
561	return $dlist
562	}
563	"-visible" {
564	set dlist {}
565	foreach dataobj $_dlist {
566	if { ![IsValidObject $dataobj] } {
567	continue
568	}
569	if { ![info exists _obj2ovride($dataobj-raise)] } {
570	# No setting indicates that the object isn't visible.
571	continue
572	}
573	# Otherwise use the -raise parameter to put the object to
574	# the front of the list.
575	if { $_obj2ovride($dataobj-raise) } {
576	set dlist [linsert $dlist 0 $dataobj]
577	} else {
578	lappend dlist $dataobj
579	}
580	}
581	return $dlist
582	}
583	-image {
584	if {[llength $args] != 2} {
585	error "wrong # args: should be \"get -image view\""
586	}
587	switch -- [lindex $args end] {
588	view {
589	return $_image(plot)
590	}
591	default {
592	error "bad image name \"[lindex $args end]\": should be view"
593	}
594	}
595	}
596	default {
597	error "bad option \"$op\": should be -objects or -image"
598	}
599	}
600	}
601
602	# ----------------------------------------------------------------------
603	# USAGE: scale ?<data1> <data2> ...?
604	#
605	# Sets the default limits for the overall plot according to the
606	# limits of the data for all of the given <data> objects. This
607	# accounts for all objects--even those not showing on the screen.
608	# Because of this, the limits are appropriate for all objects as
609	# the user scans through data in the ResultSet viewer.
610	# ----------------------------------------------------------------------
611	itcl::body Rappture::VtkSurfaceViewer::scale { args } {
612	foreach dataobj $args {
613	if { ![$dataobj isvalid] } {
614	continue; # Object doesn't contain valid data.
615	}
616	foreach axis { x y z } {
617	set lim [$dataobj limits $axis]
618	if { ![info exists _limits($axis)] } {
619	set _limits($axis) $lim
620	continue
621	}
622	foreach {min max} $lim break
623	foreach {amin amax} $_limits($axis) break
624	if { $amin > $min } {
625	set amin $min
626	}
627	if { $amax < $max } {
628	set amax $max
629	}
630	set _limits($axis) [list $amin $amax]
631	}
632	foreach { fname lim } [$dataobj fieldlimits] {
633	if { ![info exists _limits($fname)] } {
634	set _limits($fname) $lim
635	continue
636	}
637	foreach {min max} $lim break
638	foreach {fmin fmax} $_limits($fname) break
639	if { $fmin > $min } {
640	set fmin $min
641	}
642	if { $fmax < $max } {
643	set fmax $max
644	}
645	set _limits($fname) [list $fmin $fmax]
646	}
647	}
648	}
649
650	# ----------------------------------------------------------------------
651	# USAGE: download coming
652	# USAGE: download controls <downloadCommand>
653	# USAGE: download now
654	#
655	# Clients use this method to create a downloadable representation
656	# of the plot. Returns a list of the form {ext string}, where
657	# "ext" is the file extension (indicating the type of data) and
658	# "string" is the data itself.
659	# ----------------------------------------------------------------------
660	itcl::body Rappture::VtkSurfaceViewer::download {option args} {
661	switch $option {
662	coming {
663	if {[catch {
664	blt::winop snap $itk_component(plotarea) $_image(download)
665	}]} {
666	$_image(download) configure -width 1 -height 1
667	$_image(download) put #000000
668	}
669	}
670	controls {
671	set popup .vtkviewerdownload
672	if { ![winfo exists .vtkviewerdownload] } {
673	set inner [BuildDownloadPopup $popup [lindex $args 0]]
674	} else {
675	set inner [$popup component inner]
676	}
677	set _downloadPopup(image_controls) $inner.image_frame
678	set num [llength [get]]
679	set num [expr {($num == 1) ? "1 result" : "$num results"}]
680	set word [Rappture::filexfer::label downloadWord]
681	$inner.summary configure -text "$word $num in the following format:"
682	update idletasks ;# Fix initial sizes
683	return $popup
684	}
685	now {
686	set popup .vtkviewerdownload
687	if {[winfo exists .vtkviewerdownload]} {
688	$popup deactivate
689	}
690	switch -- $_downloadPopup(format) {
691	"image" {
692	return [$this GetImage [lindex $args 0]]
693	}
694	"vtk" {
695	return [$this GetVtkData [lindex $args 0]]
696	}
697	}
698	return ""
699	}
700	default {
701	error "bad option \"$option\": should be coming, controls, now"
702	}
703	}
704	}
705
706	# ----------------------------------------------------------------------
707	# USAGE: Connect ?<host:port>,<host:port>...?
708	#
709	# Clients use this method to establish a connection to a new
710	# server, or to reestablish a connection to the previous server.
711	# Any existing connection is automatically closed.
712	# ----------------------------------------------------------------------
713	itcl::body Rappture::VtkSurfaceViewer::Connect {} {
714	set _hosts [GetServerList "vtkvis"]
715	if { "" == $_hosts } {
716	return 0
717	}
718	set result [VisViewer::Connect $_hosts]
719	if { $result } {
720	if { $_reportClientInfo } {
721	# Tell the server the viewer, hub, user and session.
722	# Do this immediately on connect before buffering any commands
723	global env
724
725	set info {}
726	set user "???"
727	if { [info exists env(USER)] } {
728	set user $env(USER)
729	}
730	set session "???"
731	if { [info exists env(SESSION)] } {
732	set session $env(SESSION)
733	}
734	lappend info "version" "$Rappture::version"
735	lappend info "build" "$Rappture::build"
736	lappend info "svnurl" "$Rappture::svnurl"
737	lappend info "installdir" "$Rappture::installdir"
738	lappend info "hub" [exec hostname]
739	lappend info "client" "vtksurfaceviewer"
740	lappend info "user" $user
741	lappend info "session" $session
742	SendCmd "clientinfo [list $info]"
743	}
744
745	set w [winfo width $itk_component(view)]
746	set h [winfo height $itk_component(view)]
747	EventuallyResize $w $h
748	}
749	return $result
750	}
751
752	#
753	# isconnected --
754	#
755	# Indicates if we are currently connected to the visualization server.
756	#
757	itcl::body Rappture::VtkSurfaceViewer::isconnected {} {
758	return [VisViewer::IsConnected]
759	}
760
761	#
762	# disconnect --
763	#
764	itcl::body Rappture::VtkSurfaceViewer::disconnect {} {
765	Disconnect
766	set _reset 1
767	}
768
769	#
770	# Disconnect --
771	#
772	# Clients use this method to disconnect from the current rendering
773	# server.
774	#
775	itcl::body Rappture::VtkSurfaceViewer::Disconnect {} {
776	VisViewer::Disconnect
777
778	$_dispatcher cancel !rebuild
779	$_dispatcher cancel !resize
780	$_dispatcher cancel !rotate
781	$_dispatcher cancel !legend
782	# disconnected -- no more data sitting on server
783	set _outbuf ""
784	array unset _datasets
785	array unset _data
786	array unset _colormaps
787	array unset _seeds
788	array unset _dataset2style
789	array unset _obj2datasets
790	}
791
792	# ----------------------------------------------------------------------
793	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
794	#
795	# Invoked automatically whenever the "image" command comes in from
796	# the rendering server. Indicates that binary image data with the
797	# specified <size> will follow.
798	# ----------------------------------------------------------------------
799	itcl::body Rappture::VtkSurfaceViewer::ReceiveImage { args } {
800	array set info {
801	-token "???"
802	-bytes 0
803	-type image
804	}
805	array set info $args
806	set bytes [ReceiveBytes $info(-bytes)]
807	if { $info(-type) == "image" } {
808	if 0 {
809	set f [open "last.ppm" "w"]
810	puts $f $bytes
811	close $f
812	}
813	$_image(plot) configure -data $bytes
814	#set time [clock seconds]
815	#set date [clock format $time]
816	#set w [image width $_image(plot)]
817	#set h [image height $_image(plot)]
818	#puts stderr "$date: received image ${w}x${h} image"
819	if { $_start > 0 } {
820	set finish [clock clicks -milliseconds]
821	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
822	set _start 0
823	}
824	} elseif { $info(type) == "print" } {
825	set tag $this-print-$info(-token)
826	set _hardcopy($tag) $bytes
827	}
828	}
829
830	#
831	# ReceiveDataset --
832	#
833	itcl::body Rappture::VtkSurfaceViewer::ReceiveDataset { args } {
834	if { ![isconnected] } {
835	return
836	}
837	set option [lindex $args 0]
838	switch -- $option {
839	"scalar" {
840	set option [lindex $args 1]
841	switch -- $option {
842	"world" {
843	foreach { x y z value tag } [lrange $args 2 end] break
844	}
845	"pixel" {
846	foreach { x y value tag } [lrange $args 2 end] break
847	}
848	}
849	}
850	"vector" {
851	set option [lindex $args 1]
852	switch -- $option {
853	"world" {
854	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
855	}
856	"pixel" {
857	foreach { x y vx vy vz tag } [lrange $args 2 end] break
858	}
859	}
860	}
861	"names" {
862	foreach { name } [lindex $args 1] {
863	#puts stderr "Dataset: $name"
864	}
865	}
866	default {
867	error "unknown dataset option \"$option\" from server"
868	}
869	}
870	}
871
872	# ----------------------------------------------------------------------
873	# USAGE: Rebuild
874	#
875	# Called automatically whenever something changes that affects the
876	# data in the widget. Clears any existing data and rebuilds the
877	# widget to display new data.
878	# ----------------------------------------------------------------------
879	itcl::body Rappture::VtkSurfaceViewer::Rebuild {} {
880	set w [winfo width $itk_component(view)]
881	set h [winfo height $itk_component(view)]
882	if { $w < 2 \|\| $h < 2 } {
883	$_dispatcher event -idle !rebuild
884	return
885	}
886
887	# Turn on buffering of commands to the server. We don't want to
888	# be preempted by a server disconnect/reconnect (which automatically
889	# generates a new call to Rebuild).
890	StartBufferingCommands
891
892	if { $_reset } {
893	set _width $w
894	set _height $h
895	$_arcball resize $w $h
896	DoResize
897	#
898	# Reset the camera and other view parameters
899	#
900	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
901	$_arcball quaternion $q
902	if {$_view(ortho)} {
903	SendCmd "camera mode ortho"
904	} else {
905	SendCmd "camera mode persp"
906	}
907	DoRotate
908	PanCamera
909	set _first ""
910	InitSettings -xaxisgrid -yaxisgrid -zaxisgrid -axismode \
911	-axesvisible -axislabels -axisminorticks
912	#SendCmd "axis lformat all %g"
913	StopBufferingCommands
914	SendCmd "imgflush"
915	StartBufferingCommands
916	}
917	set _first ""
918	SendCmd "dataset visible 0"
919	foreach dataobj [get -objects] {
920	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
921	set _first $dataobj
922	}
923	set _obj2datasets($dataobj) ""
924	foreach comp [$dataobj components] {
925	set tag $dataobj-$comp
926	if { ![info exists _datasets($tag)] } {
927	set bytes [$dataobj vtkdata $comp]
928	if 0 {
929	set f [open "/tmp/surface.vtk" "w"]
930	puts $f $bytes
931	close $f
932	}
933	set length [string length $bytes]
934	if { $_reportClientInfo } {
935	set info {}
936	lappend info "tool_id" [$dataobj hints toolid]
937	lappend info "tool_name" [$dataobj hints toolname]
938	lappend info "tool_title" [$dataobj hints tooltitle]
939	lappend info "tool_command" [$dataobj hints toolcommand]
940	lappend info "tool_revision" [$dataobj hints toolrevision]
941	lappend info "dataset_label" [$dataobj hints label]
942	lappend info "dataset_size" $length
943	lappend info "dataset_tag" $tag
944	SendCmd "clientinfo [list $info]"
945	}
946	append _outbuf "dataset add $tag data follows $length\n"
947	append _outbuf $bytes
948	set _datasets($tag) 1
949	SetObjectStyle $dataobj $comp
950	}
951	lappend _obj2datasets($dataobj) $tag
952	if { [info exists _obj2ovride($dataobj-raise)] } {
953	# Setting dataset visible enables outline
954	# and contour2d
955	SendCmd "dataset visible 1 $tag"
956	}
957	}
958	}
959
960	if { $_first != "" } {
961	$itk_component(field) choices delete 0 end
962	$itk_component(fieldmenu) delete 0 end
963	array unset _fields
964	set _curFldName ""
965	foreach cname [$_first components] {
966	foreach fname [$_first fieldnames $cname] {
967	if { [info exists _fields($fname)] } {
968	continue
969	}
970	foreach { label units components } \
971	[$_first fieldinfo $fname] break
972	$itk_component(field) choices insert end "$fname" "$label"
973	$itk_component(fieldmenu) add radiobutton -label "$label" \
974	-value $label -variable [itcl::scope _curFldLabel] \
975	-selectcolor red \
976	-activebackground $itk_option(-plotbackground) \
977	-activeforeground $itk_option(-plotforeground) \
978	-font "Arial 8" \
979	-command [itcl::code $this Combo invoke]
980	set _fields($fname) [list $label $units $components]
981	if { $_curFldName == "" } {
982	set _curFldName $fname
983	set _curFldLabel $label
984	}
985	}
986	}
987	$itk_component(field) value $_curFldLabel
988	}
989	InitSettings -isolinesvisible -surfacevisible -outline
990	if { $_reset } {
991	# These are settings that rely on a dataset being loaded.
992	InitSettings \
993	-surfacelighting \
994	-field \
995	-surfaceedges -surfacelighting -surfaceopacity \
996	-surfacewireframe \
997	-numcontours
998
999	Zoom reset
1000	foreach axis { x y z } {
1001	# Another problem fixed by a <view>. We looking into a data
1002	# object for the name of the axes. This should be global to
1003	# the viewer itself.
1004	set label [$_first hints ${axis}label]
1005	if { $label == "" } {
1006	set label [string toupper $axis]
1007	}
1008	# May be a space in the axis label.
1009	SendCmd [list axis name $axis $label]
1010	}
1011	if { [array size _fields] < 2 } {
1012	catch {blt::table forget $itk_component(field) $itk_component(field_l)}
1013	}
1014	set _reset 0
1015	}
1016
1017	# Actually write the commands to the server socket. If it fails, we don't
1018	# care. We're finished here.
1019	blt::busy hold $itk_component(hull)
1020	StopBufferingCommands; # Turn off buffering and send commands.
1021	blt::busy release $itk_component(hull)
1022	}
1023
1024	# ----------------------------------------------------------------------
1025	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1026	#
1027	# Returns a list of server IDs for the current datasets being displayed. This
1028	# is normally a single ID, but it might be a list of IDs if the current data
1029	# object has multiple components.
1030	# ----------------------------------------------------------------------
1031	itcl::body Rappture::VtkSurfaceViewer::CurrentDatasets {args} {
1032	set flag [lindex $args 0]
1033	switch -- $flag {
1034	"-all" {
1035	if { [llength $args] > 1 } {
1036	error "CurrentDatasets: can't specify dataobj after \"-all\""
1037	}
1038	set dlist [get -objects]
1039	}
1040	"-visible" {
1041	if { [llength $args] > 1 } {
1042	set dlist {}
1043	set args [lrange $args 1 end]
1044	foreach dataobj $args {
1045	if { [info exists _obj2ovride($dataobj-raise)] } {
1046	lappend dlist $dataobj
1047	}
1048	}
1049	} else {
1050	set dlist [get -visible]
1051	}
1052	}
1053	default {
1054	set dlist $args
1055	}
1056	}
1057	set rlist ""
1058	foreach dataobj $dlist {
1059	foreach comp [$dataobj components] {
1060	set tag $dataobj-$comp
1061	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1062	lappend rlist $tag
1063	}
1064	}
1065	}
1066	return $rlist
1067	}
1068
1069	# ----------------------------------------------------------------------
1070	# USAGE: Zoom in
1071	# USAGE: Zoom out
1072	# USAGE: Zoom reset
1073	#
1074	# Called automatically when the user clicks on one of the zoom
1075	# controls for this widget. Changes the zoom for the current view.
1076	# ----------------------------------------------------------------------
1077	itcl::body Rappture::VtkSurfaceViewer::Zoom {option} {
1078	switch -- $option {
1079	"in" {
1080	set _view(zoom) [expr {$_view(zoom)*1.25}]
1081	SendCmd "camera zoom $_view(zoom)"
1082	}
1083	"out" {
1084	set _view(zoom) [expr {$_view(zoom)*0.8}]
1085	SendCmd "camera zoom $_view(zoom)"
1086	}
1087	"reset" {
1088	array set _view {
1089	qw 0.853553
1090	qx -0.353553
1091	qy 0.353553
1092	qz 0.146447
1093	zoom 1.0
1094	xpan 0
1095	ypan 0
1096	}
1097	if { $_first != "" } {
1098	set location [$_first hints camera]
1099	if { $location != "" } {
1100	array set _view $location
1101	}
1102	}
1103	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1104	$_arcball quaternion $q
1105	DoRotate
1106	SendCmd "camera reset"
1107	}
1108	}
1109	}
1110
1111	itcl::body Rappture::VtkSurfaceViewer::PanCamera {} {
1112	set x $_view(xpan)
1113	set y $_view(ypan)
1114	SendCmd "camera pan $x $y"
1115	}
1116
1117
1118	# ----------------------------------------------------------------------
1119	# USAGE: Rotate click <x> <y>
1120	# USAGE: Rotate drag <x> <y>
1121	# USAGE: Rotate release <x> <y>
1122	#
1123	# Called automatically when the user clicks/drags/releases in the
1124	# plot area. Moves the plot according to the user's actions.
1125	# ----------------------------------------------------------------------
1126	itcl::body Rappture::VtkSurfaceViewer::Rotate {option x y} {
1127	switch -- $option {
1128	"click" {
1129	$itk_component(view) configure -cursor fleur
1130	set _click(x) $x
1131	set _click(y) $y
1132	}
1133	"drag" {
1134	if {[array size _click] == 0} {
1135	Rotate click $x $y
1136	} else {
1137	set w [winfo width $itk_component(view)]
1138	set h [winfo height $itk_component(view)]
1139	if {$w <= 0 \|\| $h <= 0} {
1140	return
1141	}
1142
1143	if {[catch {
1144	# this fails sometimes for no apparent reason
1145	set dx [expr {double($x-$_click(x))/$w}]
1146	set dy [expr {double($y-$_click(y))/$h}]
1147	}]} {
1148	return
1149	}
1150	if { $dx == 0 && $dy == 0 } {
1151	return
1152	}
1153	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1154	EventuallyRotate $q
1155	set _click(x) $x
1156	set _click(y) $y
1157	}
1158	}
1159	"release" {
1160	Rotate drag $x $y
1161	$itk_component(view) configure -cursor ""
1162	catch {unset _click}
1163	}
1164	default {
1165	error "bad option \"$option\": should be click, drag, release"
1166	}
1167	}
1168	}
1169
1170	itcl::body Rappture::VtkSurfaceViewer::Pick {x y} {
1171	foreach tag [CurrentDatasets -visible] {
1172	SendCmdNoSplash "dataset getscalar pixel $x $y $tag"
1173	}
1174	}
1175
1176	# ----------------------------------------------------------------------
1177	# USAGE: $this Pan click x y
1178	# $this Pan drag x y
1179	# $this Pan release x y
1180	#
1181	# Called automatically when the user clicks on one of the zoom
1182	# controls for this widget. Changes the zoom for the current view.
1183	# ----------------------------------------------------------------------
1184	itcl::body Rappture::VtkSurfaceViewer::Pan {option x y} {
1185	switch -- $option {
1186	"set" {
1187	set w [winfo width $itk_component(view)]
1188	set h [winfo height $itk_component(view)]
1189	set x [expr $x / double($w)]
1190	set y [expr $y / double($h)]
1191	set _view(xpan) [expr $_view(xpan) + $x]
1192	set _view(ypan) [expr $_view(ypan) + $y]
1193	PanCamera
1194	return
1195	}
1196	"click" {
1197	set _click(x) $x
1198	set _click(y) $y
1199	$itk_component(view) configure -cursor hand1
1200	}
1201	"drag" {
1202	if { ![info exists _click(x)] } {
1203	set _click(x) $x
1204	}
1205	if { ![info exists _click(y)] } {
1206	set _click(y) $y
1207	}
1208	set w [winfo width $itk_component(view)]
1209	set h [winfo height $itk_component(view)]
1210	set dx [expr ($_click(x) - $x)/double($w)]
1211	set dy [expr ($_click(y) - $y)/double($h)]
1212	set _click(x) $x
1213	set _click(y) $y
1214	set _view(xpan) [expr $_view(xpan) - $dx]
1215	set _view(ypan) [expr $_view(ypan) - $dy]
1216	PanCamera
1217	}
1218	"release" {
1219	Pan drag $x $y
1220	$itk_component(view) configure -cursor ""
1221	}
1222	default {
1223	error "unknown option \"$option\": should set, click, drag, or release"
1224	}
1225	}
1226	}
1227
1228	# ----------------------------------------------------------------------
1229	# USAGE: InitSettings <what> ?<value>?
1230	#
1231	# Used internally to update rendering settings whenever parameters
1232	# change in the popup settings panel. Sends the new settings off
1233	# to the back end.
1234	# ----------------------------------------------------------------------
1235	itcl::body Rappture::VtkSurfaceViewer::InitSettings { args } {
1236	foreach spec $args {
1237	if { [info exists _settings($_first-$spec)] } {
1238	# Reset global setting with dataobj specific setting
1239	set _settings($spec) $_settings($_first-$spec)
1240	}
1241	AdjustSetting $spec
1242	}
1243	}
1244
1245	#
1246	# AdjustSetting --
1247	#
1248	# Changes/updates a specific setting in the widget. There are
1249	# usually user-setable option. Commands are sent to the render
1250	# server.
1251	#
1252	itcl::body Rappture::VtkSurfaceViewer::AdjustSetting {what {value ""}} {
1253	if { ![isconnected] } {
1254	return
1255	}
1256	switch -- $what {
1257	"-background" {
1258	set bgcolor [$itk_component(background) value]
1259	array set fgcolors {
1260	"black" "white"
1261	"white" "black"
1262	"grey" "black"
1263	}
1264	configure -plotbackground $bgcolor \
1265	-plotforeground $fgcolors($bgcolor)
1266	$itk_component(view) delete "legend"
1267	DrawLegend
1268	}
1269	"-axesvisible" {
1270	set bool $_settings($what)
1271	SendCmd "axis visible all $bool"
1272	}
1273	"-axislabels" {
1274	set bool $_settings($what)
1275	SendCmd "axis labels all $bool"
1276	}
1277	"-axisminorticks" {
1278	set bool $_settings($what)
1279	SendCmd "axis minticks all $bool"
1280	}
1281	"-xaxisgrid" - "-yaxisgrid" - "-zaxisgrid" {
1282	set axis [string tolower [string range $what 1 1]]
1283	set bool $_settings($what)
1284	SendCmd "axis grid $axis $bool"
1285	}
1286	"-axismode" {
1287	set mode [$itk_component(axisMode) value]
1288	set mode [$itk_component(axisMode) translate $mode]
1289	set _settings($what) $mode
1290	SendCmd "axis flymode $mode"
1291	}
1292	"-colormap" {
1293	set _changed($what) 1
1294	StartBufferingCommands
1295	set color [$itk_component(colormap) value]
1296	set _settings($what) $color
1297	if { $color == "none" } {
1298	if { $_settings(-colormapvisible) } {
1299	SendCmd "contour2d colormode constant {}"
1300	SendCmd "polydata colormode constant {}"
1301	set _settings(-colormapvisible) 0
1302	}
1303	} else {
1304	if { !$_settings(-colormapvisible) } {
1305	#SendCmd "contour2d colormode $_colorMode $_curFldName"
1306	SendCmd "polydata colormode $_colorMode $_curFldName"
1307	set _settings(-colormapvisible) 1
1308	}
1309	SetCurrentColormap $color
1310	if {$_settings(-colormapdiscrete)} {
1311	set numColors [expr $_settings(-numcontours) + 1]
1312	SendCmd "colormap res $numColors $color"
1313	}
1314	}
1315	StopBufferingCommands
1316	EventuallyRequestLegend
1317	}
1318	"-colormapdiscrete" {
1319	set bool $_settings($what)
1320	set numColors [expr $_settings(-numcontours) + 1]
1321	StartBufferingCommands
1322	if {$bool} {
1323	SendCmd "colormap res $numColors"
1324	# Discrete colormap requires preinterp on
1325	SendCmd "polydata preinterp on"
1326	} else {
1327	SendCmd "colormap res default"
1328	# FIXME: add setting for preinterp (default on)
1329	SendCmd "polydata preinterp on"
1330	}
1331	StopBufferingCommands
1332	EventuallyRequestLegend
1333	}
1334	"-numcontours" {
1335	set _settings($what) [$itk_component(numcontours) value]
1336	set _currentNumContours $_settings($what)
1337	UpdateContourList
1338	set _changed($what) 1
1339	SendCmd "contour2d contourlist [list $_contourList]"
1340	if {$_settings(-colormapdiscrete)} {
1341	set numColors [expr $_settings($what) + 1]
1342	SendCmd "colormap res $numColors"
1343	EventuallyRequestLegend
1344	} else {
1345	DrawLegend
1346	}
1347	}
1348	"-surfacewireframe" {
1349	set bool $_settings($what)
1350	SendCmd "polydata wireframe $bool"
1351	}
1352	"-isolinesvisible" {
1353	set bool $_settings($what)
1354	SendCmd "contour2d visible $bool"
1355	DrawLegend
1356	}
1357	"-surfacevisible" {
1358	set bool $_settings($what)
1359	SendCmd "polydata visible $bool"
1360	if { $bool } {
1361	Rappture::Tooltip::for $itk_component(surface) \
1362	"Hide the surface"
1363	} else {
1364	Rappture::Tooltip::for $itk_component(surface) \
1365	"Show the surface"
1366	}
1367	DrawLegend
1368	}
1369	"-surfacelighting" {
1370	set bool $_settings($what)
1371	SendCmd "polydata lighting $bool"
1372	}
1373	"-surfaceedges" {
1374	set bool $_settings($what)
1375	SendCmd "polydata edges $bool"
1376	}
1377	"-outline" {
1378	set bool $_settings($what)
1379	SendCmd "outline visible $bool"
1380	}
1381	"-isolinecolor" {
1382	set color [$itk_component(isolineColor) value]
1383	set _settings($what) $color
1384	SendCmd "contour2d linecolor [Color2RGB $color]"
1385	DrawLegend
1386	}
1387	"-surfaceopacity" {
1388	set val $_settings($what)
1389	set sval [expr { 0.01 * double($val) }]
1390	SendCmd "polydata opacity $sval"
1391	}
1392	"-field" {
1393	set label [$itk_component(field) value]
1394	set fname [$itk_component(field) translate $label]
1395	set _settings($what) $fname
1396	if { [info exists _fields($fname)] } {
1397	foreach { label units components } $_fields($fname) break
1398	if { $components > 1 } {
1399	set _colorMode vmag
1400	} else {
1401	set _colorMode scalar
1402	}
1403	set _curFldName $fname
1404	set _curFldLabel $label
1405	} else {
1406	puts stderr "unknown field \"$fname\""
1407	return
1408	}
1409	SendCmd "dataset scalar $_curFldName"
1410	if { ![info exists _limits($_curFldName)] } {
1411	SendCmd "dataset maprange all"
1412	} else {
1413	SendCmd "dataset maprange explicit $_limits($_curFldName) $_curFldName"
1414	}
1415	#SendCmd "contour2d colormode $_colorMode $_curFldName"
1416	SendCmd "polydata colormode $_colorMode $_curFldName"
1417	SendCmd "camera reset"
1418	UpdateContourList
1419	DrawLegend
1420	}
1421	"-legendvisible" {
1422	if { !$_settings($what) } {
1423	$itk_component(view) delete legend
1424	}
1425	DrawLegend
1426	}
1427	default {
1428	error "don't know how to fix $what"
1429	}
1430	}
1431	}
1432
1433
1434	#
1435	# RequestLegend --
1436	#
1437	# Request a new legend from the server. The size of the legend
1438	# is determined from the height of the canvas.
1439	#
1440	# This should be called when
1441	# 1. A new current colormap is set.
1442	# 2. Window is resized.
1443	# 3. The limits of the data have changed. (Just need a redraw).
1444	# 4. Number of isolines have changed. (Just need a redraw).
1445	# 5. Legend becomes visible (Just need a redraw).
1446	#
1447	itcl::body Rappture::VtkSurfaceViewer::RequestLegend {} {
1448	set _legendPending 0
1449	if { ![info exists _fields($_curFldName)] } {
1450	return
1451	}
1452	set fname $_curFldName
1453	set font "Arial 8"
1454	set lineht [font metrics $font -linespace]
1455	set w 12
1456	set h [expr {$_height - 2 * ($lineht + 2)}]
1457	if { $h < 1 } {
1458	return
1459	}
1460	if { [string match "component*" $fname] } {
1461	set title ""
1462	} else {
1463	if { [info exists _fields($fname)] } {
1464	foreach { title units } $_fields($fname) break
1465	if { $units != "" } {
1466	set title [format "%s (%s)" $title $units]
1467	}
1468	} else {
1469	set title $fname
1470	}
1471	}
1472	# If there's a title too, subtract one more line
1473	if { $title != "" } {
1474	incr h -$lineht
1475	}
1476	# Set the legend on the first heightmap dataset.
1477	if { $_currentColormap != "" } {
1478	set cmap $_currentColormap
1479	SendCmdNoWait "legend $cmap scalar $_curFldName {} $w $h 0"
1480	}
1481	}
1482
1483	# ----------------------------------------------------------------------
1484	# CONFIGURATION OPTION: -plotbackground
1485	# ----------------------------------------------------------------------
1486	itcl::configbody Rappture::VtkSurfaceViewer::plotbackground {
1487	if { [isconnected] } {
1488	set rgb [Color2RGB $itk_option(-plotbackground)]
1489	SendCmd "screen bgcolor $rgb"
1490	}
1491	}
1492
1493	# ----------------------------------------------------------------------
1494	# CONFIGURATION OPTION: -plotforeground
1495	# ----------------------------------------------------------------------
1496	itcl::configbody Rappture::VtkSurfaceViewer::plotforeground {
1497	if { [isconnected] } {
1498	set rgb [Color2RGB $itk_option(-plotforeground)]
1499	SendCmd "axis color all $rgb"
1500	SendCmd "outline color $rgb"
1501	}
1502	}
1503
1504	itcl::body Rappture::VtkSurfaceViewer::BuildSurfaceTab {} {
1505
1506	set fg [option get $itk_component(hull) font Font]
1507	#set bfg [option get $itk_component(hull) boldFont Font]
1508
1509	set inner [$itk_component(main) insert end \
1510	-title "Surface Settings" \
1511	-icon [Rappture::icon volume-on]]
1512	$inner configure -borderwidth 4
1513
1514	checkbutton $inner.surface \
1515	-text "Surface" \
1516	-variable [itcl::scope _settings(-surfacevisible)] \
1517	-command [itcl::code $this AdjustSetting -surfacevisible] \
1518	-font "Arial 9"
1519
1520	checkbutton $inner.isolines \
1521	-text "Isolines" \
1522	-variable [itcl::scope _settings(-isolinesvisible)] \
1523	-command [itcl::code $this AdjustSetting -isolinesvisible] \
1524	-font "Arial 9"
1525
1526	checkbutton $inner.colormapDiscrete \
1527	-text "Discrete Colormap" \
1528	-variable [itcl::scope _settings(-colormapdiscrete)] \
1529	-command [itcl::code $this AdjustSetting -colormapdiscrete] \
1530	-font "Arial 9"
1531
1532	checkbutton $inner.wireframe \
1533	-text "Wireframe" \
1534	-variable [itcl::scope _settings(-surfacewireframe)] \
1535	-command [itcl::code $this AdjustSetting -surfacewireframe] \
1536	-font "Arial 9"
1537
1538	checkbutton $inner.lighting \
1539	-text "Enable Lighting" \
1540	-variable [itcl::scope _settings(-surfacelighting)] \
1541	-command [itcl::code $this AdjustSetting -surfacelighting] \
1542	-font "Arial 9"
1543
1544	checkbutton $inner.edges \
1545	-text "Edges" \
1546	-variable [itcl::scope _settings(-surfaceedges)] \
1547	-command [itcl::code $this AdjustSetting -surfaceedges] \
1548	-font "Arial 9"
1549
1550	checkbutton $inner.outline \
1551	-text "Outline" \
1552	-variable [itcl::scope _settings(-outline)] \
1553	-command [itcl::code $this AdjustSetting -outline] \
1554	-font "Arial 9"
1555
1556	checkbutton $inner.legend \
1557	-text "Legend" \
1558	-variable [itcl::scope _settings(-legendvisible)] \
1559	-command [itcl::code $this AdjustSetting -legendvisible] \
1560	-font "Arial 9"
1561
1562	label $inner.linecolor_l -text "Isolines" -font "Arial 9"
1563	itk_component add isolineColor {
1564	Rappture::Combobox $inner.linecolor -width 10 -editable 0
1565	}
1566	$inner.linecolor choices insert end \
1567	"black" "black" \
1568	"blue" "blue" \
1569	"cyan" "cyan" \
1570	"green" "green" \
1571	"grey" "grey" \
1572	"magenta" "magenta" \
1573	"orange" "orange" \
1574	"red" "red" \
1575	"white" "white" \
1576	"none" "none"
1577
1578	$itk_component(isolineColor) value "white"
1579	bind $inner.linecolor <<Value>> \
1580	[itcl::code $this AdjustSetting -isolinecolor]
1581
1582	label $inner.background_l -text "Background" -font "Arial 9"
1583	itk_component add background {
1584	Rappture::Combobox $inner.background -width 10 -editable 0
1585	}
1586	$inner.background choices insert end \
1587	"black" "black" \
1588	"white" "white" \
1589	"grey" "grey"
1590
1591	$itk_component(background) value $_settings(-background)
1592	bind $inner.background <<Value>> \
1593	[itcl::code $this AdjustSetting -background]
1594
1595	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1596	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1597	-variable [itcl::scope _settings(-surfaceopacity)] \
1598	-width 10 \
1599	-showvalue off \
1600	-command [itcl::code $this AdjustSetting -surfaceopacity]
1601
1602	itk_component add field_l {
1603	label $inner.field_l -text "Field" -font "Arial 9"
1604	} {
1605	ignore -font
1606	}
1607	itk_component add field {
1608	Rappture::Combobox $inner.field -width 10 -editable 0
1609	}
1610	bind $inner.field <<Value>> \
1611	[itcl::code $this AdjustSetting -field]
1612
1613	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1614	itk_component add colormap {
1615	Rappture::Combobox $inner.colormap -width 10 -editable 0
1616	}
1617	$inner.colormap choices insert end [GetColormapList]
1618
1619	$itk_component(colormap) value "BCGYR"
1620	bind $inner.colormap <<Value>> \
1621	[itcl::code $this AdjustSetting -colormap]
1622
1623	label $inner.numcontours_l -text "Number of Isolines" -font "Arial 9"
1624	itk_component add numcontours {
1625	Rappture::Spinint $inner.numcontours \
1626	-min 0 -max 50 -font "arial 9"
1627	}
1628	$itk_component(numcontours) value $_settings(-numcontours)
1629	bind $itk_component(numcontours) <<Value>> \
1630	[itcl::code $this AdjustSetting -numcontours]
1631
1632	blt::table $inner \
1633	0,0 $inner.field_l -anchor w -pady 2 \
1634	0,1 $inner.field -anchor w -pady 2 -fill x \
1635	1,0 $inner.colormap_l -anchor w -pady 2 \
1636	1,1 $inner.colormap -anchor w -pady 2 -fill x \
1637	2,0 $inner.linecolor_l -anchor w -pady 2 \
1638	2,1 $inner.linecolor -anchor w -pady 2 -fill x \
1639	3,0 $inner.background_l -anchor w -pady 2 \
1640	3,1 $inner.background -anchor w -pady 2 -fill x \
1641	4,0 $inner.numcontours_l -anchor w -pady 2 \
1642	4,1 $inner.numcontours -anchor w -pady 2 \
1643	5,0 $inner.colormapDiscrete -anchor w -pady 2 -cspan 2 \
1644	6,0 $inner.isolines -anchor w -pady 2 -cspan 2 \
1645	7,0 $inner.wireframe -anchor w -pady 2 -cspan 2 \
1646	8,0 $inner.lighting -anchor w -pady 2 -cspan 2 \
1647	9,0 $inner.edges -anchor w -pady 2 -cspan 2 \
1648	10,0 $inner.outline -anchor w -pady 2 -cspan 2 \
1649	11,0 $inner.legend -anchor w -pady 2 \
1650	12,0 $inner.opacity_l -anchor w -pady 2 \
1651	12,1 $inner.opacity -fill x -pady 2 -fill x \
1652
1653	blt::table configure $inner r* c* -resize none
1654	blt::table configure $inner r13 c1 -resize expand
1655	}
1656
1657	itcl::body Rappture::VtkSurfaceViewer::BuildAxisTab {} {
1658
1659	set fg [option get $itk_component(hull) font Font]
1660	#set bfg [option get $itk_component(hull) boldFont Font]
1661
1662	set inner [$itk_component(main) insert end \
1663	-title "Axis Settings" \
1664	-icon [Rappture::icon axis2]]
1665	$inner configure -borderwidth 4
1666
1667	checkbutton $inner.visible \
1668	-text "Axes" \
1669	-variable [itcl::scope _settings(-axesvisible)] \
1670	-command [itcl::code $this AdjustSetting -axesvisible] \
1671	-font "Arial 9"
1672
1673	checkbutton $inner.labels \
1674	-text "Axis Labels" \
1675	-variable [itcl::scope _settings(-axislabels)] \
1676	-command [itcl::code $this AdjustSetting -axislabels] \
1677	-font "Arial 9"
1678	label $inner.grid_l -text "Grid" -font "Arial 9"
1679	checkbutton $inner.xgrid \
1680	-text "X" \
1681	-variable [itcl::scope _settings(-xaxisgrid)] \
1682	-command [itcl::code $this AdjustSetting -xaxisgrid] \
1683	-font "Arial 9"
1684	checkbutton $inner.ygrid \
1685	-text "Y" \
1686	-variable [itcl::scope _settings(-yaxisgrid)] \
1687	-command [itcl::code $this AdjustSetting -yaxisgrid] \
1688	-font "Arial 9"
1689	checkbutton $inner.zgrid \
1690	-text "Z" \
1691	-variable [itcl::scope _settings(-zaxisgrid)] \
1692	-command [itcl::code $this AdjustSetting -zaxisgrid] \
1693	-font "Arial 9"
1694	checkbutton $inner.minorticks \
1695	-text "Minor Ticks" \
1696	-variable [itcl::scope _settings(-axisminorticks)] \
1697	-command [itcl::code $this AdjustSetting -axisminorticks] \
1698	-font "Arial 9"
1699
1700	label $inner.mode_l -text "Mode" -font "Arial 9"
1701
1702	itk_component add axisMode {
1703	Rappture::Combobox $inner.mode -width 10 -editable 0
1704	}
1705	$inner.mode choices insert end \
1706	"static_triad" "static" \
1707	"closest_triad" "closest" \
1708	"furthest_triad" "farthest" \
1709	"outer_edges" "outer"
1710	$itk_component(axisMode) value "static"
1711	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting -axismode]
1712
1713	blt::table $inner \
1714	0,0 $inner.visible -anchor w -cspan 4 \
1715	1,0 $inner.labels -anchor w -cspan 4 \
1716	2,0 $inner.minorticks -anchor w -cspan 4 \
1717	4,0 $inner.grid_l -anchor w \
1718	4,1 $inner.xgrid -anchor w \
1719	4,2 $inner.ygrid -anchor w \
1720	4,3 $inner.zgrid -anchor w \
1721	5,0 $inner.mode_l -anchor w -padx { 2 0 } \
1722	5,1 $inner.mode -fill x -cspan 3
1723
1724	blt::table configure $inner r* c* -resize none
1725	blt::table configure $inner r7 c6 -resize expand
1726	blt::table configure $inner r3 -height 0.125i
1727	}
1728
1729	itcl::body Rappture::VtkSurfaceViewer::BuildCameraTab {} {
1730	set inner [$itk_component(main) insert end \
1731	-title "Camera Settings" \
1732	-icon [Rappture::icon camera]]
1733	$inner configure -borderwidth 4
1734
1735	label $inner.view_l -text "view" -font "Arial 9"
1736	set f [frame $inner.view]
1737	foreach side { front back left right top bottom } {
1738	button $f.$side -image [Rappture::icon view$side] \
1739	-command [itcl::code $this SetOrientation $side]
1740	Rappture::Tooltip::for $f.$side "Change the view to $side"
1741	pack $f.$side -side left
1742	}
1743
1744	blt::table $inner \
1745	0,0 $inner.view_l -anchor e -pady 2 \
1746	0,1 $inner.view -anchor w -pady 2
1747
1748	set labels { qx qy qz qw xpan ypan zoom }
1749	set row 1
1750	foreach tag $labels {
1751	label $inner.${tag}label -text $tag -font "Arial 9"
1752	entry $inner.${tag} -font "Arial 9" -bg white \
1753	-textvariable [itcl::scope _view($tag)]
1754	bind $inner.${tag} <Return> \
1755	[itcl::code $this camera set ${tag}]
1756	bind $inner.${tag} <KP_Enter> \
1757	[itcl::code $this camera set ${tag}]
1758	blt::table $inner \
1759	$row,0 $inner.${tag}label -anchor e -pady 2 \
1760	$row,1 $inner.${tag} -anchor w -pady 2
1761	blt::table configure $inner r$row -resize none
1762	incr row
1763	}
1764	checkbutton $inner.ortho \
1765	-text "Orthographic Projection" \
1766	-variable [itcl::scope _view(ortho)] \
1767	-command [itcl::code $this camera set ortho] \
1768	-font "Arial 9"
1769	blt::table $inner \
1770	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1771	blt::table configure $inner r$row -resize none
1772	incr row
1773
1774	blt::table configure $inner c* r* -resize none
1775	blt::table configure $inner c2 -resize expand
1776	blt::table configure $inner r$row -resize expand
1777	}
1778
1779	#
1780	# camera --
1781	#
1782	itcl::body Rappture::VtkSurfaceViewer::camera {option args} {
1783	switch -- $option {
1784	"show" {
1785	puts [array get _view]
1786	}
1787	"set" {
1788	set who [lindex $args 0]
1789	set x $_view($who)
1790	set code [catch { string is double $x } result]
1791	if { $code != 0 \|\| !$result } {
1792	return
1793	}
1794	switch -- $who {
1795	"ortho" {
1796	if {$_view(ortho)} {
1797	SendCmd "camera mode ortho"
1798	} else {
1799	SendCmd "camera mode persp"
1800	}
1801	}
1802	"xpan" - "ypan" {
1803	PanCamera
1804	}
1805	"qx" - "qy" - "qz" - "qw" {
1806	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1807	$_arcball quaternion $q
1808	EventuallyRotate $q
1809	}
1810	"zoom" {
1811	SendCmd "camera zoom $_view(zoom)"
1812	}
1813	}
1814	}
1815	}
1816	}
1817
1818	itcl::body Rappture::VtkSurfaceViewer::GetVtkData { args } {
1819	set bytes ""
1820	foreach dataobj [get] {
1821	foreach cname [$dataobj components] {
1822	set tag $dataobj-$cname
1823	set contents [$dataobj vtkdata $cname]
1824	append bytes "$contents\n"
1825	}
1826	}
1827	return [list .vtk $bytes]
1828	}
1829
1830	itcl::body Rappture::VtkSurfaceViewer::GetImage { args } {
1831	if { [image width $_image(download)] > 0 &&
1832	[image height $_image(download)] > 0 } {
1833	set bytes [$_image(download) data -format "jpeg -quality 100"]
1834	set bytes [Rappture::encoding::decode -as b64 $bytes]
1835	return [list .jpg $bytes]
1836	}
1837	return ""
1838	}
1839
1840	itcl::body Rappture::VtkSurfaceViewer::BuildDownloadPopup { popup command } {
1841	Rappture::Balloon $popup \
1842	-title "[Rappture::filexfer::label downloadWord] as..."
1843	set inner [$popup component inner]
1844	label $inner.summary -text "" -anchor w
1845	radiobutton $inner.vtk_button -text "VTK data file" \
1846	-variable [itcl::scope _downloadPopup(format)] \
1847	-font "Arial 9 " \
1848	-value vtk
1849	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
1850	radiobutton $inner.image_button -text "Image File" \
1851	-variable [itcl::scope _downloadPopup(format)] \
1852	-font "Arial 9 " \
1853	-value image
1854	Rappture::Tooltip::for $inner.image_button \
1855	"Save as digital image."
1856
1857	button $inner.ok -text "Save" \
1858	-highlightthickness 0 -pady 2 -padx 3 \
1859	-command $command \
1860	-compound left \
1861	-image [Rappture::icon download]
1862
1863	button $inner.cancel -text "Cancel" \
1864	-highlightthickness 0 -pady 2 -padx 3 \
1865	-command [list $popup deactivate] \
1866	-compound left \
1867	-image [Rappture::icon cancel]
1868
1869	blt::table $inner \
1870	0,0 $inner.summary -cspan 2 \
1871	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
1872	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
1873	4,1 $inner.cancel -width .9i -fill y \
1874	4,0 $inner.ok -padx 2 -width .9i -fill y
1875	blt::table configure $inner r3 -height 4
1876	blt::table configure $inner r4 -pady 4
1877	raise $inner.image_button
1878	$inner.vtk_button invoke
1879	return $inner
1880	}
1881
1882	itcl::body Rappture::VtkSurfaceViewer::SetObjectStyle { dataobj comp } {
1883	# Parse style string.
1884	set tag $dataobj-$comp
1885	array set style {
1886	-color BCGYR
1887	-edgecolor black
1888	-edges 0
1889	-isolinecolor white
1890	-isolinesvisible 0
1891	-levels 10
1892	-lighting 1
1893	-linewidth 1.0
1894	-opacity 1.0
1895	-outline 0
1896	-surfacevisible 1
1897	-wireframe 0
1898	}
1899	array set style [$dataobj style $comp]
1900	if { $dataobj != $_first \|\| $style(-levels) == 1 } {
1901	set style(-opacity) 1
1902	}
1903
1904	# This is too complicated. We want to set the colormap, number of
1905	# isolines and opacity for the dataset. They can be the default values,
1906	# the style hints loaded with the dataset, or set by user controls. As
1907	# datasets get loaded, they first use the defaults that are overidden
1908	# by the style hints. If the user changes the global controls, then that
1909	# overrides everything else. I don't know what it means when global
1910	# controls are specified as style hints by each dataset. It complicates
1911	# the code to handle aberrant cases.
1912
1913	if { $_changed(-surfaceopacity) } {
1914	set style(-opacity) [expr $_settings(-surfaceopacity) * 0.01]
1915	}
1916	if { $_changed(-numcontours) } {
1917	set style(-levels) $_settings(-numcontours)
1918	}
1919	if { $_changed(-colormap) } {
1920	set style(-color) $_settings(-colormap)
1921	}
1922	if { $_currentColormap == "" } {
1923	SetCurrentColormap $style(-color)
1924	$itk_component(colormap) value $style(-color)
1925	}
1926	if { $_currentNumContours != $style(-levels) } {
1927	set _currentNumContours $style(-levels)
1928	set _settings(-numcontours) $_currentNumContours
1929	$itk_component(numcontours) value $_currentNumContours
1930	UpdateContourList
1931	DrawLegend
1932	}
1933	set _settings(-isolinesvisible) $style(-isolinesvisible)
1934	set _settings(-surfacevisible) $style(-surfacevisible)
1935
1936	SendCmd "outline add $tag"
1937	SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
1938	SendCmd "outline visible $style(-outline) $tag"
1939	set _settings(-outline) $style(-outline)
1940
1941	SendCmd "polydata add $tag"
1942	SendCmd "polydata edges $style(-edges) $tag"
1943	set _settings(-surfaceedges) $style(-edges)
1944	#SendCmd "polydata color [Color2RGB $settings(-color)] $tag"
1945	SendCmd "polydata lighting $style(-lighting) $tag"
1946	set _settings(-surfacelighting) $style(-lighting)
1947	SendCmd "polydata linecolor [Color2RGB $style(-edgecolor)] $tag"
1948	SendCmd "polydata linewidth $style(-linewidth) $tag"
1949	SendCmd "polydata opacity $style(-opacity) $tag"
1950	set _settings(-surfaceopacity) [expr $style(-opacity) * 100.0]
1951	SetCurrentColormap $style(-color)
1952	SendCmd "polydata wireframe $style(-wireframe) $tag"
1953	set _settings(-surfacewireframe) $style(-wireframe)
1954
1955	SendCmd [list contour2d add contourlist $_contourList $tag]
1956	SendCmd "contour2d colormode constant {} $tag"
1957	SendCmd "contour2d color [Color2RGB $style(-isolinecolor)] $tag"
1958	}
1959
1960	itcl::body Rappture::VtkSurfaceViewer::IsValidObject { dataobj } {
1961	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
1962	return 0
1963	}
1964	return 1
1965	}
1966
1967	#
1968	# EnterLegend --
1969	#
1970	itcl::body Rappture::VtkSurfaceViewer::EnterLegend { x y } {
1971	SetLegendTip $x $y
1972	}
1973
1974	#
1975	# MotionLegend --
1976	#
1977	itcl::body Rappture::VtkSurfaceViewer::MotionLegend { x y } {
1978	Rappture::Tooltip::tooltip cancel
1979	set c $itk_component(view)
1980	set cw [winfo width $c]
1981	set ch [winfo height $c]
1982	if { $x >= 0 && $x < $cw && $y >= 0 && $y < $ch } {
1983	SetLegendTip $x $y
1984	}
1985	}
1986
1987	#
1988	# LeaveLegend --
1989	#
1990	itcl::body Rappture::VtkSurfaceViewer::LeaveLegend { } {
1991	Rappture::Tooltip::tooltip cancel
1992	.rappturetooltip configure -icon ""
1993	}
1994
1995	#
1996	# SetLegendTip --
1997	#
1998	itcl::body Rappture::VtkSurfaceViewer::SetLegendTip { x y } {
1999	set fname $_curFldName
2000	set c $itk_component(view)
2001	set w [winfo width $c]
2002	set h [winfo height $c]
2003
2004	set font "Arial 8"
2005	set lineht [font metrics $font -linespace]
2006
2007	set ih [image height $_image(legend)]
2008	set iy [expr $y - ($lineht + 2)]
2009
2010	if { [string match "component*" $fname] } {
2011	set title ""
2012	} else {
2013	if { [info exists _fields($fname)] } {
2014	foreach { title units } $_fields($fname) break
2015	if { $units != "" } {
2016	set title [format "%s (%s)" $title $units]
2017	}
2018	} else {
2019	set title $fname
2020	}
2021	}
2022	# If there's a legend title, increase the offset by the line height.
2023	if { $title != "" } {
2024	incr iy -$lineht
2025	}
2026	# Make a swatch of the selected color
2027	if { [catch { $_image(legend) get 10 $iy } pixel] != 0 } {
2028	return
2029	}
2030	if { ![info exists _image(swatch)] } {
2031	set _image(swatch) [image create photo -width 24 -height 24]
2032	}
2033	set color [eval format "\#%02x%02x%02x" $pixel]
2034	$_image(swatch) put black -to 0 0 23 23
2035	$_image(swatch) put $color -to 1 1 22 22
2036	.rappturetooltip configure -icon $_image(swatch)
2037
2038	# Compute the value of the point
2039	if { [info exists _limits($_curFldName)] } {
2040	foreach { vmin vmax } $_limits($_curFldName) break
2041	set t [expr 1.0 - (double($iy) / double($ih-1))]
2042	set value [expr $t * ($vmax - $vmin) + $vmin]
2043	} else {
2044	set value 0.0
2045	}
2046	set tx [expr $x + 15]
2047	set ty [expr $y - 5]
2048	if { [info exists _isolines($y)] } {
2049	Rappture::Tooltip::text $c [format "$title %g (isoline)" $_isolines($y)]
2050	} else {
2051	Rappture::Tooltip::text $c [format "$title %g" $value]
2052	}
2053	Rappture::Tooltip::tooltip show $c +$tx,+$ty
2054	}
2055
2056	#
2057	# ReceiveLegend --
2058	#
2059	# Invoked automatically whenever the "legend" command comes in from
2060	# the rendering server. Indicates that binary image data with the
2061	# specified <size> will follow.
2062	#
2063	itcl::body Rappture::VtkSurfaceViewer::ReceiveLegend { colormap title min max size } {
2064	#puts stderr "ReceiveLegend colormap=$colormap title=$title range=$min,$max size=$size"
2065	set _title $title
2066	regsub {\(mag\)} $title "" _title
2067	if { [IsConnected] } {
2068	set bytes [ReceiveBytes $size]
2069	if { ![info exists _image(legend)] } {
2070	set _image(legend) [image create photo]
2071	}
2072	$_image(legend) configure -data $bytes
2073	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2074	if { [catch {DrawLegend} errs] != 0 } {
2075	global errorInfo
2076	puts stderr "errs=$errs errorInfo=$errorInfo"
2077	}
2078	}
2079	}
2080
2081	#
2082	# DrawLegend --
2083	#
2084	# Draws the legend in the own canvas on the right side of the plot area.
2085	#
2086	itcl::body Rappture::VtkSurfaceViewer::DrawLegend {} {
2087	set fname $_curFldName
2088	set c $itk_component(view)
2089	set w [winfo width $c]
2090	set h [winfo height $c]
2091	set font "Arial 8"
2092	set lineht [font metrics $font -linespace]
2093
2094	if { [string match "component*" $fname] } {
2095	set title ""
2096	} else {
2097	if { [info exists _fields($fname)] } {
2098	foreach { title units } $_fields($fname) break
2099	if { $units != "" } {
2100	set title [format "%s (%s)" $title $units]
2101	}
2102	} else {
2103	set title $fname
2104	}
2105	}
2106	set x [expr $w - 2]
2107	if { !$_settings(-legendvisible) } {
2108	$c delete legend
2109	return
2110	}
2111	if { [$c find withtag "legend"] == "" } {
2112	set y 2
2113	# If there's a legend title, create a text item for the title.
2114	$c create text $x $y \
2115	-anchor ne \
2116	-fill $itk_option(-plotforeground) -tags "title legend" \
2117	-font $font
2118	if { $title != "" } {
2119	incr y $lineht
2120	}
2121	$c create text $x $y \
2122	-anchor ne \
2123	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2124	-font $font
2125	incr y $lineht
2126	$c create image $x $y \
2127	-anchor ne \
2128	-image $_image(legend) -tags "colormap legend"
2129	$c create rectangle $x $y 1 1 \
2130	-fill "" -outline "" -tags "sensor legend"
2131	$c create text $x [expr {$h-2}] \
2132	-anchor se \
2133	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2134	-font $font
2135	$c bind sensor <Enter> [itcl::code $this EnterLegend %x %y]
2136	$c bind sensor <Leave> [itcl::code $this LeaveLegend]
2137	$c bind sensor <Motion> [itcl::code $this MotionLegend %x %y]
2138	}
2139	$c delete isoline
2140	set x2 $x
2141	set iw [image width $_image(legend)]
2142	set ih [image height $_image(legend)]
2143	set x1 [expr $x2 - ($iw*12)/10]
2144	set color $_settings(-isolinecolor)
2145	# Draw the isolines on the legend.
2146	array unset _isolines
2147	if { $color != "none" && [info exists _limits($_curFldName)] &&
2148	$_settings(-isolinesvisible) && $_settings(-numcontours) > 0 } {
2149
2150	foreach { vmin vmax } $_limits($_curFldName) break
2151	set range [expr double($vmax - $vmin)]
2152	if { $range <= 0.0 } {
2153	set range 1.0; # Min is greater or equal to max.
2154	}
2155	set tags "isoline legend"
2156	set offset [expr 2 + $lineht]
2157	if { $title != "" } {
2158	incr offset $lineht
2159	}
2160	foreach value $_contourList {
2161	set norm [expr 1.0 - (($value - $vmin) / $range)]
2162	set y1 [expr int(round(($norm * $ih) + $offset))]
2163	for { set off 0 } { $off < 3 } { incr off } {
2164	set _isolines([expr $y1 + $off]) $value
2165	set _isolines([expr $y1 - $off]) $value
2166	}
2167	$c create line $x1 $y1 $x2 $y1 -fill $color -tags $tags
2168	}
2169	}
2170
2171	$c bind title <ButtonPress> [itcl::code $this Combo post]
2172	$c bind title <Enter> [itcl::code $this Combo activate]
2173	$c bind title <Leave> [itcl::code $this Combo deactivate]
2174	# Reset the item coordinates according the current size of the plot.
2175	$c itemconfigure title -text $title
2176	if { [info exists _limits($_curFldName)] } {
2177	foreach { vmin vmax } $_limits($_curFldName) break
2178	$c itemconfigure vmin -text [format %g $vmin]
2179	$c itemconfigure vmax -text [format %g $vmax]
2180	}
2181	set y 2
2182	# If there's a legend title, move the title to the correct position
2183	if { $title != "" } {
2184	$c itemconfigure title -text $title
2185	$c coords title $x $y
2186	incr y $lineht
2187	$c raise title
2188	}
2189	$c coords vmax $x $y
2190	incr y $lineht
2191	$c coords colormap $x $y
2192	$c coords sensor [expr $x - $iw] $y $x [expr $y + $ih]
2193	$c raise sensor
2194	$c coords vmin $x [expr {$h - 2}]
2195	}
2196
2197	# ----------------------------------------------------------------------
2198	# USAGE: _dropdown post
2199	# USAGE: _dropdown unpost
2200	# USAGE: _dropdown select
2201	#
2202	# Used internally to handle the dropdown list for this combobox. The
2203	# post/unpost options are invoked when the list is posted or unposted
2204	# to manage the relief of the controlling button. The select option
2205	# is invoked whenever there is a selection from the list, to assign
2206	# the value back to the gauge.
2207	# ----------------------------------------------------------------------
2208	itcl::body Rappture::VtkSurfaceViewer::Combo {option} {
2209	set c $itk_component(view)
2210	switch -- $option {
2211	post {
2212	foreach { x1 y1 x2 y2 } [$c bbox title] break
2213	set cw [winfo width $itk_component(view)]
2214	set mw [winfo reqwidth $itk_component(fieldmenu)]
2215	set x1 [expr $cw - $mw]
2216	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2217	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2218	tk_popup $itk_component(fieldmenu) $x $y
2219	}
2220	activate {
2221	$c itemconfigure title -fill red
2222	}
2223	deactivate {
2224	$c itemconfigure title -fill $itk_option(-plotforeground)
2225	}
2226	invoke {
2227	$itk_component(field) value $_curFldLabel
2228	AdjustSetting -field
2229	}
2230	default {
2231	error "bad option \"$option\": should be post, unpost, select"
2232	}
2233	}
2234	}
2235
2236	#
2237	# SetCurrentColormap --
2238	#
2239	itcl::body Rappture::VtkSurfaceViewer::SetCurrentColormap { name } {
2240	# Keep track of the colormaps that we build.
2241	if { ![info exists _colormaps($name)] } {
2242	BuildColormap $name
2243	set _colormaps($name) 1
2244	}
2245	set _currentColormap $name
2246	SendCmd "contour2d colormap $_currentColormap"
2247	SendCmd "polydata colormap $_currentColormap"
2248	}
2249
2250	#
2251	# BuildColormap --
2252	#
2253	# Build the designated colormap on the server.
2254	#
2255	itcl::body Rappture::VtkSurfaceViewer::BuildColormap { name } {
2256	set cmap [ColorsToColormap $name]
2257	if { [llength $cmap] == 0 } {
2258	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
2259	}
2260	set wmap "0.0 1.0 1.0 1.0"
2261	SendCmd "colormap add $name { $cmap } { $wmap }"
2262	}
2263
2264	itcl::body Rappture::VtkSurfaceViewer::SetOrientation { side } {
2265	array set positions {
2266	front "1 0 0 0"
2267	back "0 0 1 0"
2268	left "0.707107 0 -0.707107 0"
2269	right "0.707107 0 0.707107 0"
2270	top "0.707107 -0.707107 0 0"
2271	bottom "0.707107 0.707107 0 0"
2272	}
2273	foreach name { qw qx qy qz } value $positions($side) {
2274	set _view($name) $value
2275	}
2276	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2277	$_arcball quaternion $q
2278	SendCmd "camera orient $q"
2279	SendCmd "camera reset"
2280	set _view(xpan) 0
2281	set _view(ypan) 0
2282	set _view(zoom) 1.0
2283	}
2284
2285	itcl::body Rappture::VtkSurfaceViewer::UpdateContourList {} {
2286	if { ![info exists _limits($_curFldName)] } {
2287	return
2288	}
2289	if { $_currentNumContours < 1 } {
2290	set _contourList ""
2291	return
2292	}
2293	foreach { vmin vmax } $_limits($_curFldName) break
2294	set v [blt::vector create \#auto]
2295	$v seq $vmin $vmax [expr $_currentNumContours+2]
2296	$v delete end 0
2297	set _contourList [$v range 0 end]
2298	blt::vector destroy $v
2299	}
2300

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