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source: branches/1.3/gui/scripts/vtksurfaceviewer.tcl @ 4676

Last change on this file since 4676 was 4676, checked in by ldelgass, 9 years ago
merge r4642 from trunk
File size: 76.8 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 limits { colormap }
60	public method parameters {title args} {
61	# do nothing
62	}
63	public method scale {args}
64
65	protected method Connect {}
66	protected method CurrentDatasets {args}
67	protected method Disconnect {}
68	protected method DoResize {}
69	protected method DoRotate {}
70	protected method AdjustSetting {what {value ""}}
71	protected method InitSettings { args }
72	protected method Pan {option x y}
73	protected method Pick {x y}
74	protected method Rebuild {}
75	protected method ReceiveDataset { args }
76	protected method ReceiveImage { args }
77	protected method ReceiveLegend { colormap title vmin vmax size }
78	protected method Rotate {option x y}
79	protected method Zoom {option}
80
81	# The following methods are only used by this class.
82	private method BuildAxisTab {}
83	private method BuildCameraTab {}
84	private method BuildColormap { name }
85	private method BuildDownloadPopup { widget command }
86	private method BuildSurfaceTab {}
87	private method Combo { option }
88	private method DrawLegend {}
89	private method EnterLegend { x y }
90	private method EventuallyResize { w h }
91	private method EventuallyRotate { q }
92	private method EventuallyRequestLegend {}
93	private method GetImage { args }
94	private method GetVtkData { args }
95	private method IsValidObject { dataobj }
96	private method LeaveLegend {}
97	private method MotionLegend { x y }
98	private method PanCamera {}
99	private method RequestLegend {}
100	private method SetLegendTip { x y }
101	private method SetObjectStyle { dataobj comp }
102	private method SetCurrentColormap { color }
103	private method SetOrientation { side }
104	private method UpdateContourList {}
105
106	private variable _arcball ""
107
108	private variable _dlist "" ; # list of data objects
109	private variable _obj2datasets
110	private variable _obj2ovride ; # maps dataobj => style override
111	private variable _datasets ; # contains all the dataobj-component
112	; # datasets in the server
113	private variable _colormaps ; # contains all the colormaps
114	; # in the server.
115	# The name of the current colormap used. The colormap is global to all
116	# heightmaps displayed.
117	private variable _currentColormap ""
118	private variable _currentNumContours -1
119
120	private variable _dataset2style ;# maps dataobj-component to transfunc
121
122	private variable _click ; # info used for rotate operations
123	private variable _limits ; # autoscale min/max for all axes
124	private variable _view ; # view params for 3D view
125	private variable _settings
126	private variable _style; # Array of current component styles.
127	private variable _changed
128	private variable _initialStyle; # Array of initial component styles.
129	private variable _reset 1; # indicates if camera needs to be reset
130	# to starting position.
131
132	private variable _first "" ; # This is the topmost dataset.
133	private variable _start 0
134	private variable _title ""
135	private variable _isolines
136	private variable _contourList ""
137
138	common _downloadPopup; # download options from popup
139	private common _hardcopy
140	private variable _width 0
141	private variable _height 0
142	private variable _resizePending 0
143	private variable _rotatePending 0
144	private variable _legendPending 0
145	private variable _field ""
146	private variable _colorMode "scalar"; # Mode of colormap (vmag or scalar)
147	private variable _fieldNames {}
148	private variable _fields
149	private variable _curFldName ""
150	private variable _curFldLabel ""
151	}
152
153	itk::usual VtkSurfaceViewer {
154	keep -background -foreground -cursor -font
155	keep -plotbackground -plotforeground
156	}
157
158	# ----------------------------------------------------------------------
159	# CONSTRUCTOR
160	# ----------------------------------------------------------------------
161	itcl::body Rappture::VtkSurfaceViewer::constructor {hostlist args} {
162	package require vtk
163	set _serverType "vtkvis"
164
165	# Rebuild event
166	$_dispatcher register !rebuild
167	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
168
169	# Resize event
170	$_dispatcher register !resize
171	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
172
173	# Rotate event
174	$_dispatcher register !rotate
175	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
176
177	# Legend event
178	$_dispatcher register !legend
179	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
180
181	#
182	# Populate parser with commands handle incoming requests
183	#
184	$_parser alias image [itcl::code $this ReceiveImage]
185	$_parser alias dataset [itcl::code $this ReceiveDataset]
186	$_parser alias legend [itcl::code $this ReceiveLegend]
187
188	# Initialize the view to some default parameters.
189	array set _view {
190	qw 0.853553
191	qx -0.353553
192	qy 0.353553
193	qz 0.146447
194	zoom 1.0
195	xpan 0
196	ypan 0
197	ortho 0
198	}
199	set _arcball [blt::arcball create 100 100]
200	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
201	$_arcball quaternion $q
202
203	array set _settings {
204	-axesvisible 1
205	-axislabelsvisible 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	-xaxisgrid 0
221	-yaxisgrid 0
222	-zaxisgrid 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 -axislabelsvisible
912	foreach axis { x y z } {
913	SendCmd "axis lformat $axis %g"
914	}
915	StopBufferingCommands
916	SendCmd "imgflush"
917	StartBufferingCommands
918	}
919	set _first ""
920	SendCmd "dataset visible 0"
921	foreach dataobj [get -objects] {
922	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
923	set _first $dataobj
924	}
925	set _obj2datasets($dataobj) ""
926	foreach comp [$dataobj components] {
927	set tag $dataobj-$comp
928	if { ![info exists _datasets($tag)] } {
929	set bytes [$dataobj vtkdata $comp]
930	if 0 {
931	set f [open "/tmp/surface.vtk" "w"]
932	puts $f $bytes
933	close $f
934	}
935	set length [string length $bytes]
936	if { $_reportClientInfo } {
937	set info {}
938	lappend info "tool_id" [$dataobj hints toolId]
939	lappend info "tool_name" [$dataobj hints toolName]
940	lappend info "tool_version" [$dataobj hints toolRevision]
941	lappend info "tool_title" [$dataobj hints toolTitle]
942	lappend info "dataset_label" [$dataobj hints label]
943	lappend info "dataset_size" $length
944	lappend info "dataset_tag" $tag
945	SendCmd "clientinfo [list $info]"
946	}
947	append _outbuf "dataset add $tag data follows $length\n"
948	append _outbuf $bytes
949	set _datasets($tag) 1
950	SetObjectStyle $dataobj $comp
951	}
952	lappend _obj2datasets($dataobj) $tag
953	if { [info exists _obj2ovride($dataobj-raise)] } {
954	# Setting dataset visible enables outline
955	# and contour2d
956	SendCmd "dataset visible 1 $tag"
957	}
958	}
959	}
960
961	if { $_first != "" } {
962	$itk_component(field) choices delete 0 end
963	$itk_component(fieldmenu) delete 0 end
964	array unset _fields
965	set _curFldName ""
966	foreach cname [$_first components] {
967	foreach fname [$_first fieldnames $cname] {
968	if { [info exists _fields($fname)] } {
969	continue
970	}
971	foreach { label units components } \
972	[$_first fieldinfo $fname] break
973	$itk_component(field) choices insert end "$fname" "$label"
974	$itk_component(fieldmenu) add radiobutton -label "$label" \
975	-value $label -variable [itcl::scope _curFldLabel] \
976	-selectcolor red \
977	-activebackground $itk_option(-plotbackground) \
978	-activeforeground $itk_option(-plotforeground) \
979	-font "Arial 8" \
980	-command [itcl::code $this Combo invoke]
981	set _fields($fname) [list $label $units $components]
982	if { $_curFldName == "" } {
983	set _curFldName $fname
984	set _curFldLabel $label
985	}
986	}
987	}
988	$itk_component(field) value $_curFldLabel
989	}
990	InitSettings -isolinesvisible -surfacevisible -outline
991	if { $_reset } {
992	# These are settings that rely on a dataset being loaded.
993	InitSettings \
994	-surfacelighting \
995	-field \
996	-surfaceedges -surfacelighting -surfaceopacity \
997	-surfacewireframe \
998	-numcontours
999
1000	Zoom reset
1001	foreach axis { x y z } {
1002	# Another problem fixed by a <view>. We looking into a data
1003	# object for the name of the axes. This should be global to
1004	# the viewer itself.
1005	set label [$_first hints ${axis}label]
1006	if { $label == "" } {
1007	set label [string toupper $axis]
1008	}
1009	# May be a space in the axis label.
1010	SendCmd [list axis name $axis $label]
1011	}
1012	if { [array size _fields] < 2 } {
1013	catch {blt::table forget $itk_component(field) $itk_component(field_l)}
1014	}
1015	set _reset 0
1016	}
1017
1018	# Actually write the commands to the server socket. If it fails, we don't
1019	# care. We're finished here.
1020	blt::busy hold $itk_component(hull)
1021	StopBufferingCommands; # Turn off buffering and send commands.
1022	blt::busy release $itk_component(hull)
1023	}
1024
1025	# ----------------------------------------------------------------------
1026	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1027	#
1028	# Returns a list of server IDs for the current datasets being displayed. This
1029	# is normally a single ID, but it might be a list of IDs if the current data
1030	# object has multiple components.
1031	# ----------------------------------------------------------------------
1032	itcl::body Rappture::VtkSurfaceViewer::CurrentDatasets {args} {
1033	set flag [lindex $args 0]
1034	switch -- $flag {
1035	"-all" {
1036	if { [llength $args] > 1 } {
1037	error "CurrentDatasets: can't specify dataobj after \"-all\""
1038	}
1039	set dlist [get -objects]
1040	}
1041	"-visible" {
1042	if { [llength $args] > 1 } {
1043	set dlist {}
1044	set args [lrange $args 1 end]
1045	foreach dataobj $args {
1046	if { [info exists _obj2ovride($dataobj-raise)] } {
1047	lappend dlist $dataobj
1048	}
1049	}
1050	} else {
1051	set dlist [get -visible]
1052	}
1053	}
1054	default {
1055	set dlist $args
1056	}
1057	}
1058	set rlist ""
1059	foreach dataobj $dlist {
1060	foreach comp [$dataobj components] {
1061	set tag $dataobj-$comp
1062	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1063	lappend rlist $tag
1064	}
1065	}
1066	}
1067	return $rlist
1068	}
1069
1070	# ----------------------------------------------------------------------
1071	# USAGE: Zoom in
1072	# USAGE: Zoom out
1073	# USAGE: Zoom reset
1074	#
1075	# Called automatically when the user clicks on one of the zoom
1076	# controls for this widget. Changes the zoom for the current view.
1077	# ----------------------------------------------------------------------
1078	itcl::body Rappture::VtkSurfaceViewer::Zoom {option} {
1079	switch -- $option {
1080	"in" {
1081	set _view(zoom) [expr {$_view(zoom)*1.25}]
1082	SendCmd "camera zoom $_view(zoom)"
1083	}
1084	"out" {
1085	set _view(zoom) [expr {$_view(zoom)*0.8}]
1086	SendCmd "camera zoom $_view(zoom)"
1087	}
1088	"reset" {
1089	array set _view {
1090	qw 0.853553
1091	qx -0.353553
1092	qy 0.353553
1093	qz 0.146447
1094	zoom 1.0
1095	xpan 0
1096	ypan 0
1097	}
1098	if { $_first != "" } {
1099	set location [$_first hints camera]
1100	if { $location != "" } {
1101	array set _view $location
1102	}
1103	}
1104	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1105	$_arcball quaternion $q
1106	DoRotate
1107	SendCmd "camera reset"
1108	}
1109	}
1110	}
1111
1112	itcl::body Rappture::VtkSurfaceViewer::PanCamera {} {
1113	set x $_view(xpan)
1114	set y $_view(ypan)
1115	SendCmd "camera pan $x $y"
1116	}
1117
1118
1119	# ----------------------------------------------------------------------
1120	# USAGE: Rotate click <x> <y>
1121	# USAGE: Rotate drag <x> <y>
1122	# USAGE: Rotate release <x> <y>
1123	#
1124	# Called automatically when the user clicks/drags/releases in the
1125	# plot area. Moves the plot according to the user's actions.
1126	# ----------------------------------------------------------------------
1127	itcl::body Rappture::VtkSurfaceViewer::Rotate {option x y} {
1128	switch -- $option {
1129	"click" {
1130	$itk_component(view) configure -cursor fleur
1131	set _click(x) $x
1132	set _click(y) $y
1133	}
1134	"drag" {
1135	if {[array size _click] == 0} {
1136	Rotate click $x $y
1137	} else {
1138	set w [winfo width $itk_component(view)]
1139	set h [winfo height $itk_component(view)]
1140	if {$w <= 0 \|\| $h <= 0} {
1141	return
1142	}
1143
1144	if {[catch {
1145	# this fails sometimes for no apparent reason
1146	set dx [expr {double($x-$_click(x))/$w}]
1147	set dy [expr {double($y-$_click(y))/$h}]
1148	}]} {
1149	return
1150	}
1151	if { $dx == 0 && $dy == 0 } {
1152	return
1153	}
1154	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1155	EventuallyRotate $q
1156	set _click(x) $x
1157	set _click(y) $y
1158	}
1159	}
1160	"release" {
1161	Rotate drag $x $y
1162	$itk_component(view) configure -cursor ""
1163	catch {unset _click}
1164	}
1165	default {
1166	error "bad option \"$option\": should be click, drag, release"
1167	}
1168	}
1169	}
1170
1171	itcl::body Rappture::VtkSurfaceViewer::Pick {x y} {
1172	foreach tag [CurrentDatasets -visible] {
1173	SendCmdNoSplash "dataset getscalar pixel $x $y $tag"
1174	}
1175	}
1176
1177	# ----------------------------------------------------------------------
1178	# USAGE: $this Pan click x y
1179	# $this Pan drag x y
1180	# $this Pan release x y
1181	#
1182	# Called automatically when the user clicks on one of the zoom
1183	# controls for this widget. Changes the zoom for the current view.
1184	# ----------------------------------------------------------------------
1185	itcl::body Rappture::VtkSurfaceViewer::Pan {option x y} {
1186	switch -- $option {
1187	"set" {
1188	set w [winfo width $itk_component(view)]
1189	set h [winfo height $itk_component(view)]
1190	set x [expr $x / double($w)]
1191	set y [expr $y / double($h)]
1192	set _view(xpan) [expr $_view(xpan) + $x]
1193	set _view(ypan) [expr $_view(ypan) + $y]
1194	PanCamera
1195	return
1196	}
1197	"click" {
1198	set _click(x) $x
1199	set _click(y) $y
1200	$itk_component(view) configure -cursor hand1
1201	}
1202	"drag" {
1203	if { ![info exists _click(x)] } {
1204	set _click(x) $x
1205	}
1206	if { ![info exists _click(y)] } {
1207	set _click(y) $y
1208	}
1209	set w [winfo width $itk_component(view)]
1210	set h [winfo height $itk_component(view)]
1211	set dx [expr ($_click(x) - $x)/double($w)]
1212	set dy [expr ($_click(y) - $y)/double($h)]
1213	set _click(x) $x
1214	set _click(y) $y
1215	set _view(xpan) [expr $_view(xpan) - $dx]
1216	set _view(ypan) [expr $_view(ypan) - $dy]
1217	PanCamera
1218	}
1219	"release" {
1220	Pan drag $x $y
1221	$itk_component(view) configure -cursor ""
1222	}
1223	default {
1224	error "unknown option \"$option\": should set, click, drag, or release"
1225	}
1226	}
1227	}
1228
1229	# ----------------------------------------------------------------------
1230	# USAGE: InitSettings <what> ?<value>?
1231	#
1232	# Used internally to update rendering settings whenever parameters
1233	# change in the popup settings panel. Sends the new settings off
1234	# to the back end.
1235	# ----------------------------------------------------------------------
1236	itcl::body Rappture::VtkSurfaceViewer::InitSettings { args } {
1237	foreach spec $args {
1238	if { [info exists _settings($_first-$spec)] } {
1239	# Reset global setting with dataobj specific setting
1240	set _settings($spec) $_settings($_first-$spec)
1241	}
1242	AdjustSetting $spec
1243	}
1244	}
1245
1246	#
1247	# AdjustSetting --
1248	#
1249	# Changes/updates a specific setting in the widget. There are
1250	# usually user-setable option. Commands are sent to the render
1251	# server.
1252	#
1253	itcl::body Rappture::VtkSurfaceViewer::AdjustSetting {what {value ""}} {
1254	if { ![isconnected] } {
1255	return
1256	}
1257	switch -- $what {
1258	"-background" {
1259	set bgcolor [$itk_component(background) value]
1260	array set fgcolors {
1261	"black" "white"
1262	"white" "black"
1263	"grey" "black"
1264	}
1265	configure -plotbackground $bgcolor \
1266	-plotforeground $fgcolors($bgcolor)
1267	$itk_component(view) delete "legend"
1268	DrawLegend
1269	}
1270	"-axesvisible" {
1271	set bool $_settings(-axesvisible)
1272	SendCmd "axis visible all $bool"
1273	}
1274	"-axislabelsvisible" {
1275	set bool $_settings(-axislabelsvisible)
1276	SendCmd "axis labels all $bool"
1277	}
1278	"-xaxisgrid" - "-yaxisgrid" - "-zaxisgrid" {
1279	set axis [string tolower [string range $what 1 1]]
1280	set bool $_settings($what)
1281	SendCmd "axis grid $axis $bool"
1282	}
1283	"-axismode" {
1284	set mode [$itk_component(axisMode) value]
1285	set mode [$itk_component(axisMode) translate $mode]
1286	set _settings($what) $mode
1287	SendCmd "axis flymode $mode"
1288	}
1289	"-colormap" {
1290	set _changed($what) 1
1291	StartBufferingCommands
1292	set color [$itk_component(colormap) value]
1293	set _settings($what) $color
1294	if { $color == "none" } {
1295	if { $_settings(-colormapvisible) } {
1296	SendCmd "contour2d colormode constant {}"
1297	SendCmd "polydata colormode constant {}"
1298	set _settings(-colormapvisible) 0
1299	}
1300	} else {
1301	if { !$_settings(-colormapvisible) } {
1302	#SendCmd "contour2d colormode $_colorMode $_curFldName"
1303	SendCmd "polydata colormode $_colorMode $_curFldName"
1304	set _settings(-colormapvisible) 1
1305	}
1306	SetCurrentColormap $color
1307	if {$_settings(-colormapdiscrete)} {
1308	set numColors [expr $_settings(-numcontours) + 1]
1309	SendCmd "colormap res $numColors $color"
1310	}
1311	}
1312	StopBufferingCommands
1313	EventuallyRequestLegend
1314	}
1315	"-colormapdiscrete" {
1316	set bool $_settings($what)
1317	set numColors [expr $_settings(-numcontours) + 1]
1318	StartBufferingCommands
1319	if {$bool} {
1320	SendCmd "colormap res $numColors"
1321	# Discrete colormap requires preinterp on
1322	SendCmd "polydata preinterp on"
1323	} else {
1324	SendCmd "colormap res default"
1325	# FIXME: add setting for preinterp (default on)
1326	SendCmd "polydata preinterp on"
1327	}
1328	StopBufferingCommands
1329	EventuallyRequestLegend
1330	}
1331	"-numcontours" {
1332	set _settings($what) [$itk_component(numcontours) value]
1333	set _currentNumContours $_settings($what)
1334	UpdateContourList
1335	set _changed($what) 1
1336	SendCmd "contour2d contourlist [list $_contourList]"
1337	if {$_settings(-colormapdiscrete)} {
1338	set numColors [expr $_settings($what) + 1]
1339	SendCmd "colormap res $numColors"
1340	EventuallyRequestLegend
1341	} else {
1342	DrawLegend
1343	}
1344	}
1345	"-surfacewireframe" {
1346	set bool $_settings($what)
1347	SendCmd "polydata wireframe $bool"
1348	}
1349	"-isolinesvisible" {
1350	set bool $_settings($what)
1351	SendCmd "contour2d visible $bool"
1352	DrawLegend
1353	}
1354	"-surfacevisible" {
1355	set bool $_settings($what)
1356	SendCmd "polydata visible $bool"
1357	if { $bool } {
1358	Rappture::Tooltip::for $itk_component(surface) \
1359	"Hide the surface"
1360	} else {
1361	Rappture::Tooltip::for $itk_component(surface) \
1362	"Show the surface"
1363	}
1364	DrawLegend
1365	}
1366	"-surfacelighting" {
1367	set bool $_settings($what)
1368	SendCmd "polydata lighting $bool"
1369	}
1370	"-surfaceedges" {
1371	set bool $_settings($what)
1372	SendCmd "polydata edges $bool"
1373	}
1374	"-outline" {
1375	set bool $_settings($what)
1376	SendCmd "outline visible $bool"
1377	}
1378	"-isolinecolor" {
1379	set color [$itk_component(isolineColor) value]
1380	set _settings($what) $color
1381	SendCmd "contour2d linecolor [Color2RGB $color]"
1382	DrawLegend
1383	}
1384	"-surfaceopacity" {
1385	set val $_settings($what)
1386	set sval [expr { 0.01 * double($val) }]
1387	SendCmd "polydata opacity $sval"
1388	}
1389	"-field" {
1390	set label [$itk_component(field) value]
1391	set fname [$itk_component(field) translate $label]
1392	set _settings($what) $fname
1393	if { [info exists _fields($fname)] } {
1394	foreach { label units components } $_fields($fname) break
1395	if { $components > 1 } {
1396	set _colorMode vmag
1397	} else {
1398	set _colorMode scalar
1399	}
1400	set _curFldName $fname
1401	set _curFldLabel $label
1402	} else {
1403	puts stderr "unknown field \"$fname\""
1404	return
1405	}
1406	SendCmd "dataset scalar $_curFldName"
1407	if { ![info exists _limits($_curFldName)] } {
1408	SendCmd "dataset maprange all"
1409	} else {
1410	SendCmd "dataset maprange explicit $_limits($_curFldName) $_curFldName"
1411	}
1412	#SendCmd "contour2d colormode $_colorMode $_curFldName"
1413	SendCmd "polydata colormode $_colorMode $_curFldName"
1414	SendCmd "camera reset"
1415	UpdateContourList
1416	DrawLegend
1417	}
1418	"-legendvisible" {
1419	if { !$_settings($what) } {
1420	$itk_component(view) delete legend
1421	}
1422	DrawLegend
1423	}
1424	default {
1425	error "don't know how to fix $what"
1426	}
1427	}
1428	}
1429
1430
1431	#
1432	# RequestLegend --
1433	#
1434	# Request a new legend from the server. The size of the legend
1435	# is determined from the height of the canvas.
1436	#
1437	# This should be called when
1438	# 1. A new current colormap is set.
1439	# 2. Window is resized.
1440	# 3. The limits of the data have changed. (Just need a redraw).
1441	# 4. Number of isolines have changed. (Just need a redraw).
1442	# 5. Legend becomes visible (Just need a redraw).
1443	#
1444	itcl::body Rappture::VtkSurfaceViewer::RequestLegend {} {
1445	set _legendPending 0
1446	if { ![info exists _fields($_curFldName)] } {
1447	return
1448	}
1449	set fname $_curFldName
1450	set font "Arial 8"
1451	set lineht [font metrics $font -linespace]
1452	set w 12
1453	set h [expr {$_height - 2 * ($lineht + 2)}]
1454	if { $h < 1 } {
1455	return
1456	}
1457	if { [string match "component*" $fname] } {
1458	set title ""
1459	} else {
1460	if { [info exists _fields($fname)] } {
1461	foreach { title units } $_fields($fname) break
1462	if { $units != "" } {
1463	set title [format "%s (%s)" $title $units]
1464	}
1465	} else {
1466	set title $fname
1467	}
1468	}
1469	# If there's a title too, subtract one more line
1470	if { $title != "" } {
1471	incr h -$lineht
1472	}
1473	# Set the legend on the first heightmap dataset.
1474	if { $_currentColormap != "" } {
1475	set cmap $_currentColormap
1476	SendCmdNoWait "legend $cmap scalar $_curFldName {} $w $h 0"
1477	}
1478	}
1479
1480	# ----------------------------------------------------------------------
1481	# CONFIGURATION OPTION: -plotbackground
1482	# ----------------------------------------------------------------------
1483	itcl::configbody Rappture::VtkSurfaceViewer::plotbackground {
1484	if { [isconnected] } {
1485	set rgb [Color2RGB $itk_option(-plotbackground)]
1486	SendCmd "screen bgcolor $rgb"
1487	}
1488	}
1489
1490	# ----------------------------------------------------------------------
1491	# CONFIGURATION OPTION: -plotforeground
1492	# ----------------------------------------------------------------------
1493	itcl::configbody Rappture::VtkSurfaceViewer::plotforeground {
1494	if { [isconnected] } {
1495	set rgb [Color2RGB $itk_option(-plotforeground)]
1496	SendCmd "axis color all $rgb"
1497	SendCmd "outline color $rgb"
1498	}
1499	}
1500
1501	itcl::body Rappture::VtkSurfaceViewer::limits { dataobj } {
1502	foreach { limits(xmin) limits(xmax) } [$dataobj limits x] break
1503	foreach { limits(ymin) limits(ymax) } [$dataobj limits y] break
1504	foreach { limits(zmin) limits(zmax) } [$dataobj limits z] break
1505	foreach { limits(vmin) limits(vmax) } [$dataobj limits v] break
1506	return [array get limits]
1507	}
1508
1509	itcl::body Rappture::VtkSurfaceViewer::BuildSurfaceTab {} {
1510
1511	set fg [option get $itk_component(hull) font Font]
1512	#set bfg [option get $itk_component(hull) boldFont Font]
1513
1514	set inner [$itk_component(main) insert end \
1515	-title "Surface Settings" \
1516	-icon [Rappture::icon volume-on]]
1517	$inner configure -borderwidth 4
1518
1519	checkbutton $inner.surface \
1520	-text "Surface" \
1521	-variable [itcl::scope _settings(-surfacevisible)] \
1522	-command [itcl::code $this AdjustSetting -surfacevisible] \
1523	-font "Arial 9"
1524
1525	checkbutton $inner.isolines \
1526	-text "Isolines" \
1527	-variable [itcl::scope _settings(-isolinesvisible)] \
1528	-command [itcl::code $this AdjustSetting -isolinesvisible] \
1529	-font "Arial 9"
1530
1531	checkbutton $inner.colormapDiscrete \
1532	-text "Discrete Colormap" \
1533	-variable [itcl::scope _settings(-colormapdiscrete)] \
1534	-command [itcl::code $this AdjustSetting -colormapdiscrete] \
1535	-font "Arial 9"
1536
1537	checkbutton $inner.wireframe \
1538	-text "Wireframe" \
1539	-variable [itcl::scope _settings(-surfacewireframe)] \
1540	-command [itcl::code $this AdjustSetting -surfacewireframe] \
1541	-font "Arial 9"
1542
1543	checkbutton $inner.lighting \
1544	-text "Enable Lighting" \
1545	-variable [itcl::scope _settings(-surfacelighting)] \
1546	-command [itcl::code $this AdjustSetting -surfacelighting] \
1547	-font "Arial 9"
1548
1549	checkbutton $inner.edges \
1550	-text "Edges" \
1551	-variable [itcl::scope _settings(-surfaceedges)] \
1552	-command [itcl::code $this AdjustSetting -surfaceedges] \
1553	-font "Arial 9"
1554
1555	checkbutton $inner.outline \
1556	-text "Outline" \
1557	-variable [itcl::scope _settings(-outline)] \
1558	-command [itcl::code $this AdjustSetting -outline] \
1559	-font "Arial 9"
1560
1561	checkbutton $inner.legend \
1562	-text "Legend" \
1563	-variable [itcl::scope _settings(-legendvisible)] \
1564	-command [itcl::code $this AdjustSetting -legendvisible] \
1565	-font "Arial 9"
1566
1567	label $inner.linecolor_l -text "Isolines" -font "Arial 9"
1568	itk_component add isolineColor {
1569	Rappture::Combobox $inner.linecolor -width 10 -editable 0
1570	}
1571	$inner.linecolor choices insert end \
1572	"black" "black" \
1573	"blue" "blue" \
1574	"cyan" "cyan" \
1575	"green" "green" \
1576	"grey" "grey" \
1577	"magenta" "magenta" \
1578	"orange" "orange" \
1579	"red" "red" \
1580	"white" "white" \
1581	"none" "none"
1582
1583	$itk_component(isolineColor) value "white"
1584	bind $inner.linecolor <<Value>> \
1585	[itcl::code $this AdjustSetting -isolinecolor]
1586
1587	label $inner.background_l -text "Background" -font "Arial 9"
1588	itk_component add background {
1589	Rappture::Combobox $inner.background -width 10 -editable 0
1590	}
1591	$inner.background choices insert end \
1592	"black" "black" \
1593	"white" "white" \
1594	"grey" "grey"
1595
1596	$itk_component(background) value $_settings(-background)
1597	bind $inner.background <<Value>> \
1598	[itcl::code $this AdjustSetting -background]
1599
1600	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1601	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1602	-variable [itcl::scope _settings(-surfaceopacity)] \
1603	-width 10 \
1604	-showvalue off \
1605	-command [itcl::code $this AdjustSetting -surfaceopacity]
1606
1607	itk_component add field_l {
1608	label $inner.field_l -text "Field" -font "Arial 9"
1609	} {
1610	ignore -font
1611	}
1612	itk_component add field {
1613	Rappture::Combobox $inner.field -width 10 -editable 0
1614	}
1615	bind $inner.field <<Value>> \
1616	[itcl::code $this AdjustSetting -field]
1617
1618	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1619	itk_component add colormap {
1620	Rappture::Combobox $inner.colormap -width 10 -editable 0
1621	}
1622	$inner.colormap choices insert end [GetColormapList]
1623
1624	$itk_component(colormap) value "BCGYR"
1625	bind $inner.colormap <<Value>> \
1626	[itcl::code $this AdjustSetting -colormap]
1627
1628	label $inner.numcontours_l -text "Number of Isolines" -font "Arial 9"
1629	itk_component add numcontours {
1630	Rappture::Spinint $inner.numcontours \
1631	-min 0 -max 50 -font "arial 9"
1632	}
1633	$itk_component(numcontours) value $_settings(-numcontours)
1634	bind $itk_component(numcontours) <<Value>> \
1635	[itcl::code $this AdjustSetting -numcontours]
1636
1637	blt::table $inner \
1638	0,0 $inner.field_l -anchor w -pady 2 \
1639	0,1 $inner.field -anchor w -pady 2 -fill x \
1640	1,0 $inner.colormap_l -anchor w -pady 2 \
1641	1,1 $inner.colormap -anchor w -pady 2 -fill x \
1642	2,0 $inner.linecolor_l -anchor w -pady 2 \
1643	2,1 $inner.linecolor -anchor w -pady 2 -fill x \
1644	3,0 $inner.background_l -anchor w -pady 2 \
1645	3,1 $inner.background -anchor w -pady 2 -fill x \
1646	4,0 $inner.numcontours_l -anchor w -pady 2 \
1647	4,1 $inner.numcontours -anchor w -pady 2 \
1648	5,0 $inner.colormapDiscrete -anchor w -pady 2 -cspan 2 \
1649	6,0 $inner.isolines -anchor w -pady 2 -cspan 2 \
1650	7,0 $inner.wireframe -anchor w -pady 2 -cspan 2 \
1651	8,0 $inner.lighting -anchor w -pady 2 -cspan 2 \
1652	9,0 $inner.edges -anchor w -pady 2 -cspan 2 \
1653	10,0 $inner.outline -anchor w -pady 2 -cspan 2 \
1654	11,0 $inner.legend -anchor w -pady 2 \
1655	12,0 $inner.opacity_l -anchor w -pady 2 \
1656	12,1 $inner.opacity -fill x -pady 2 -fill x \
1657
1658	blt::table configure $inner r* c* -resize none
1659	blt::table configure $inner r13 c1 -resize expand
1660	}
1661
1662	itcl::body Rappture::VtkSurfaceViewer::BuildAxisTab {} {
1663
1664	set fg [option get $itk_component(hull) font Font]
1665	#set bfg [option get $itk_component(hull) boldFont Font]
1666
1667	set inner [$itk_component(main) insert end \
1668	-title "Axis Settings" \
1669	-icon [Rappture::icon axis2]]
1670	$inner configure -borderwidth 4
1671
1672	checkbutton $inner.visible \
1673	-text "Show Axes" \
1674	-variable [itcl::scope _settings(-axesvisible)] \
1675	-command [itcl::code $this AdjustSetting -axesvisible] \
1676	-font "Arial 9"
1677
1678	checkbutton $inner.labels \
1679	-text "Show Axis Labels" \
1680	-variable [itcl::scope _settings(-axislabelsvisible)] \
1681	-command [itcl::code $this AdjustSetting -axislabelsvisible] \
1682	-font "Arial 9"
1683
1684	checkbutton $inner.gridx \
1685	-text "Show X Grid" \
1686	-variable [itcl::scope _settings(-xaxisgrid)] \
1687	-command [itcl::code $this AdjustSetting -xaxisgrid] \
1688	-font "Arial 9"
1689	checkbutton $inner.gridy \
1690	-text "Show Y Grid" \
1691	-variable [itcl::scope _settings(-yaxisgrid)] \
1692	-command [itcl::code $this AdjustSetting -yaxisgrid] \
1693	-font "Arial 9"
1694	checkbutton $inner.gridz \
1695	-text "Show Z Grid" \
1696	-variable [itcl::scope _settings(-zaxisgrid)] \
1697	-command [itcl::code $this AdjustSetting -zaxisgrid] \
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 2 \
1715	1,0 $inner.labels -anchor w -cspan 2 \
1716	2,0 $inner.gridx -anchor w -cspan 2 \
1717	3,0 $inner.gridy -anchor w -cspan 2 \
1718	4,0 $inner.gridz -anchor w -cspan 2 \
1719	5,0 $inner.mode_l -anchor w -cspan 2 -padx { 2 0 } \
1720	6,0 $inner.mode -fill x -cspan 2
1721
1722	blt::table configure $inner r* c* -resize none
1723	blt::table configure $inner r7 c1 -resize expand
1724	}
1725
1726
1727	itcl::body Rappture::VtkSurfaceViewer::BuildCameraTab {} {
1728	set inner [$itk_component(main) insert end \
1729	-title "Camera Settings" \
1730	-icon [Rappture::icon camera]]
1731	$inner configure -borderwidth 4
1732
1733	label $inner.view_l -text "view" -font "Arial 9"
1734	set f [frame $inner.view]
1735	foreach side { front back left right top bottom } {
1736	button $f.$side -image [Rappture::icon view$side] \
1737	-command [itcl::code $this SetOrientation $side]
1738	Rappture::Tooltip::for $f.$side "Change the view to $side"
1739	pack $f.$side -side left
1740	}
1741
1742	blt::table $inner \
1743	0,0 $inner.view_l -anchor e -pady 2 \
1744	0,1 $inner.view -anchor w -pady 2
1745
1746	set labels { qx qy qz qw xpan ypan zoom }
1747	set row 1
1748	foreach tag $labels {
1749	label $inner.${tag}label -text $tag -font "Arial 9"
1750	entry $inner.${tag} -font "Arial 9" -bg white \
1751	-textvariable [itcl::scope _view($tag)]
1752	bind $inner.${tag} <KeyPress-Return> \
1753	[itcl::code $this camera set ${tag}]
1754	blt::table $inner \
1755	$row,0 $inner.${tag}label -anchor e -pady 2 \
1756	$row,1 $inner.${tag} -anchor w -pady 2
1757	blt::table configure $inner r$row -resize none
1758	incr row
1759	}
1760	checkbutton $inner.ortho \
1761	-text "Orthographic Projection" \
1762	-variable [itcl::scope _view(ortho)] \
1763	-command [itcl::code $this camera set ortho] \
1764	-font "Arial 9"
1765	blt::table $inner \
1766	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1767	blt::table configure $inner r$row -resize none
1768	incr row
1769
1770	blt::table configure $inner c* r* -resize none
1771	blt::table configure $inner c2 -resize expand
1772	blt::table configure $inner r$row -resize expand
1773	}
1774
1775	#
1776	# camera --
1777	#
1778	itcl::body Rappture::VtkSurfaceViewer::camera {option args} {
1779	switch -- $option {
1780	"show" {
1781	puts [array get _view]
1782	}
1783	"set" {
1784	set who [lindex $args 0]
1785	set x $_view($who)
1786	set code [catch { string is double $x } result]
1787	if { $code != 0 \|\| !$result } {
1788	return
1789	}
1790	switch -- $who {
1791	"ortho" {
1792	if {$_view(ortho)} {
1793	SendCmd "camera mode ortho"
1794	} else {
1795	SendCmd "camera mode persp"
1796	}
1797	}
1798	"xpan" - "ypan" {
1799	PanCamera
1800	}
1801	"qx" - "qy" - "qz" - "qw" {
1802	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1803	$_arcball quaternion $q
1804	EventuallyRotate $q
1805	}
1806	"zoom" {
1807	SendCmd "camera zoom $_view(zoom)"
1808	}
1809	}
1810	}
1811	}
1812	}
1813
1814	itcl::body Rappture::VtkSurfaceViewer::GetVtkData { args } {
1815	set bytes ""
1816	foreach dataobj [get] {
1817	foreach cname [$dataobj components] {
1818	set tag $dataobj-$cname
1819	set contents [$dataobj vtkdata $cname]
1820	append bytes "$contents\n"
1821	}
1822	}
1823	return [list .vtk $bytes]
1824	}
1825
1826	itcl::body Rappture::VtkSurfaceViewer::GetImage { args } {
1827	if { [image width $_image(download)] > 0 &&
1828	[image height $_image(download)] > 0 } {
1829	set bytes [$_image(download) data -format "jpeg -quality 100"]
1830	set bytes [Rappture::encoding::decode -as b64 $bytes]
1831	return [list .jpg $bytes]
1832	}
1833	return ""
1834	}
1835
1836	itcl::body Rappture::VtkSurfaceViewer::BuildDownloadPopup { popup command } {
1837	Rappture::Balloon $popup \
1838	-title "[Rappture::filexfer::label downloadWord] as..."
1839	set inner [$popup component inner]
1840	label $inner.summary -text "" -anchor w
1841	radiobutton $inner.vtk_button -text "VTK data file" \
1842	-variable [itcl::scope _downloadPopup(format)] \
1843	-font "Arial 9 " \
1844	-value vtk
1845	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
1846	radiobutton $inner.image_button -text "Image File" \
1847	-variable [itcl::scope _downloadPopup(format)] \
1848	-font "Arial 9 " \
1849	-value image
1850	Rappture::Tooltip::for $inner.image_button \
1851	"Save as digital image."
1852
1853	button $inner.ok -text "Save" \
1854	-highlightthickness 0 -pady 2 -padx 3 \
1855	-command $command \
1856	-compound left \
1857	-image [Rappture::icon download]
1858
1859	button $inner.cancel -text "Cancel" \
1860	-highlightthickness 0 -pady 2 -padx 3 \
1861	-command [list $popup deactivate] \
1862	-compound left \
1863	-image [Rappture::icon cancel]
1864
1865	blt::table $inner \
1866	0,0 $inner.summary -cspan 2 \
1867	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
1868	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
1869	4,1 $inner.cancel -width .9i -fill y \
1870	4,0 $inner.ok -padx 2 -width .9i -fill y
1871	blt::table configure $inner r3 -height 4
1872	blt::table configure $inner r4 -pady 4
1873	raise $inner.image_button
1874	$inner.vtk_button invoke
1875	return $inner
1876	}
1877
1878	itcl::body Rappture::VtkSurfaceViewer::SetObjectStyle { dataobj comp } {
1879	# Parse style string.
1880	set tag $dataobj-$comp
1881	array set style {
1882	-color BCGYR
1883	-edgecolor black
1884	-edges 0
1885	-isolinecolor white
1886	-isolinesvisible 0
1887	-levels 10
1888	-lighting 1
1889	-linewidth 1.0
1890	-opacity 1.0
1891	-outline 0
1892	-surfacevisible 1
1893	-wireframe 0
1894	}
1895	array set style [$dataobj style $comp]
1896	if { $dataobj != $_first \|\| $style(-levels) == 1 } {
1897	set style(-opacity) 1
1898	}
1899
1900	# This is too complicated. We want to set the colormap, number of
1901	# isolines and opacity for the dataset. They can be the default values,
1902	# the style hints loaded with the dataset, or set by user controls. As
1903	# datasets get loaded, they first use the defaults that are overidden
1904	# by the style hints. If the user changes the global controls, then that
1905	# overrides everything else. I don't know what it means when global
1906	# controls are specified as style hints by each dataset. It complicates
1907	# the code to handle aberrant cases.
1908
1909	if { $_changed(-surfaceopacity) } {
1910	set style(-opacity) [expr $_settings(-surfaceopacity) * 0.01]
1911	}
1912	if { $_changed(-numcontours) } {
1913	set style(-levels) $_settings(-numcontours)
1914	}
1915	if { $_changed(-colormap) } {
1916	set style(-color) $_settings(-colormap)
1917	}
1918	if { $_currentColormap == "" } {
1919	SetCurrentColormap $style(-color)
1920	$itk_component(colormap) value $style(-color)
1921	}
1922	if { $_currentNumContours != $style(-levels) } {
1923	set _currentNumContours $style(-levels)
1924	set _settings(-numcontours) $_currentNumContours
1925	$itk_component(numcontours) value $_currentNumContours
1926	UpdateContourList
1927	DrawLegend
1928	}
1929	set _settings(-isolinesvisible) $style(-isolinesvisible)
1930	set _settings(-surfacevisible) $style(-surfacevisible)
1931
1932	SendCmd "outline add $tag"
1933	SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
1934	SendCmd "outline visible $style(-outline) $tag"
1935	set _settings(-outline) $style(-outline)
1936
1937	SendCmd "polydata add $tag"
1938	SendCmd "polydata edges $style(-edges) $tag"
1939	set _settings(-surfaceedges) $style(-edges)
1940	#SendCmd "polydata color [Color2RGB $settings(-color)] $tag"
1941	SendCmd "polydata lighting $style(-lighting) $tag"
1942	set _settings(-surfacelighting) $style(-lighting)
1943	SendCmd "polydata linecolor [Color2RGB $style(-edgecolor)] $tag"
1944	SendCmd "polydata linewidth $style(-linewidth) $tag"
1945	SendCmd "polydata opacity $style(-opacity) $tag"
1946	set _settings(-surfaceopacity) [expr $style(-opacity) * 100.0]
1947	SetCurrentColormap $style(-color)
1948	SendCmd "polydata wireframe $style(-wireframe) $tag"
1949	set _settings(-surfacewireframe) $style(-wireframe)
1950
1951	SendCmd [list contour2d add contourlist $_contourList $tag]
1952	SendCmd "contour2d colormode constant {} $tag"
1953	SendCmd "contour2d color [Color2RGB $style(-isolinecolor)] $tag"
1954	}
1955
1956	itcl::body Rappture::VtkSurfaceViewer::IsValidObject { dataobj } {
1957	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
1958	return 0
1959	}
1960	return 1
1961	}
1962
1963	#
1964	# EnterLegend --
1965	#
1966	itcl::body Rappture::VtkSurfaceViewer::EnterLegend { x y } {
1967	SetLegendTip $x $y
1968	}
1969
1970	#
1971	# MotionLegend --
1972	#
1973	itcl::body Rappture::VtkSurfaceViewer::MotionLegend { x y } {
1974	Rappture::Tooltip::tooltip cancel
1975	set c $itk_component(view)
1976	set cw [winfo width $c]
1977	set ch [winfo height $c]
1978	if { $x >= 0 && $x < $cw && $y >= 0 && $y < $ch } {
1979	SetLegendTip $x $y
1980	}
1981	}
1982
1983	#
1984	# LeaveLegend --
1985	#
1986	itcl::body Rappture::VtkSurfaceViewer::LeaveLegend { } {
1987	Rappture::Tooltip::tooltip cancel
1988	.rappturetooltip configure -icon ""
1989	}
1990
1991	#
1992	# SetLegendTip --
1993	#
1994	itcl::body Rappture::VtkSurfaceViewer::SetLegendTip { x y } {
1995	set fname $_curFldName
1996	set c $itk_component(view)
1997	set w [winfo width $c]
1998	set h [winfo height $c]
1999
2000	set font "Arial 8"
2001	set lineht [font metrics $font -linespace]
2002
2003	set ih [image height $_image(legend)]
2004	set iy [expr $y - ($lineht + 2)]
2005
2006	if { [string match "component*" $fname] } {
2007	set title ""
2008	} else {
2009	if { [info exists _fields($fname)] } {
2010	foreach { title units } $_fields($fname) break
2011	if { $units != "" } {
2012	set title [format "%s (%s)" $title $units]
2013	}
2014	} else {
2015	set title $fname
2016	}
2017	}
2018	# If there's a legend title, increase the offset by the line height.
2019	if { $title != "" } {
2020	incr iy -$lineht
2021	}
2022	# Make a swatch of the selected color
2023	if { [catch { $_image(legend) get 10 $iy } pixel] != 0 } {
2024	return
2025	}
2026	if { ![info exists _image(swatch)] } {
2027	set _image(swatch) [image create photo -width 24 -height 24]
2028	}
2029	set color [eval format "\#%02x%02x%02x" $pixel]
2030	$_image(swatch) put black -to 0 0 23 23
2031	$_image(swatch) put $color -to 1 1 22 22
2032	.rappturetooltip configure -icon $_image(swatch)
2033
2034	# Compute the value of the point
2035	if { [info exists _limits($_curFldName)] } {
2036	foreach { vmin vmax } $_limits($_curFldName) break
2037	set t [expr 1.0 - (double($iy) / double($ih-1))]
2038	set value [expr $t * ($vmax - $vmin) + $vmin]
2039	} else {
2040	set value 0.0
2041	}
2042	set tx [expr $x + 15]
2043	set ty [expr $y - 5]
2044	if { [info exists _isolines($y)] } {
2045	Rappture::Tooltip::text $c [format "$title %g (isoline)" $_isolines($y)]
2046	} else {
2047	Rappture::Tooltip::text $c [format "$title %g" $value]
2048	}
2049	Rappture::Tooltip::tooltip show $c +$tx,+$ty
2050	}
2051
2052	#
2053	# ReceiveLegend --
2054	#
2055	# Invoked automatically whenever the "legend" command comes in from
2056	# the rendering server. Indicates that binary image data with the
2057	# specified <size> will follow.
2058	#
2059	itcl::body Rappture::VtkSurfaceViewer::ReceiveLegend { colormap title min max size } {
2060	#puts stderr "ReceiveLegend colormap=$colormap title=$title range=$min,$max size=$size"
2061	set _title $title
2062	regsub {\(mag\)} $title "" _title
2063	if { [IsConnected] } {
2064	set bytes [ReceiveBytes $size]
2065	if { ![info exists _image(legend)] } {
2066	set _image(legend) [image create photo]
2067	}
2068	$_image(legend) configure -data $bytes
2069	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2070	if { [catch {DrawLegend} errs] != 0 } {
2071	global errorInfo
2072	puts stderr "errs=$errs errorInfo=$errorInfo"
2073	}
2074	}
2075	}
2076
2077	#
2078	# DrawLegend --
2079	#
2080	# Draws the legend in the own canvas on the right side of the plot area.
2081	#
2082	itcl::body Rappture::VtkSurfaceViewer::DrawLegend {} {
2083	set fname $_curFldName
2084	set c $itk_component(view)
2085	set w [winfo width $c]
2086	set h [winfo height $c]
2087	set font "Arial 8"
2088	set lineht [font metrics $font -linespace]
2089
2090	if { [string match "component*" $fname] } {
2091	set title ""
2092	} else {
2093	if { [info exists _fields($fname)] } {
2094	foreach { title units } $_fields($fname) break
2095	if { $units != "" } {
2096	set title [format "%s (%s)" $title $units]
2097	}
2098	} else {
2099	set title $fname
2100	}
2101	}
2102	set x [expr $w - 2]
2103	if { !$_settings(-legendvisible) } {
2104	$c delete legend
2105	return
2106	}
2107	if { [$c find withtag "legend"] == "" } {
2108	set y 2
2109	# If there's a legend title, create a text item for the title.
2110	$c create text $x $y \
2111	-anchor ne \
2112	-fill $itk_option(-plotforeground) -tags "title legend" \
2113	-font $font
2114	if { $title != "" } {
2115	incr y $lineht
2116	}
2117	$c create text $x $y \
2118	-anchor ne \
2119	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2120	-font $font
2121	incr y $lineht
2122	$c create image $x $y \
2123	-anchor ne \
2124	-image $_image(legend) -tags "colormap legend"
2125	$c create rectangle $x $y 1 1 \
2126	-fill "" -outline "" -tags "sensor legend"
2127	$c create text $x [expr {$h-2}] \
2128	-anchor se \
2129	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2130	-font $font
2131	$c bind sensor <Enter> [itcl::code $this EnterLegend %x %y]
2132	$c bind sensor <Leave> [itcl::code $this LeaveLegend]
2133	$c bind sensor <Motion> [itcl::code $this MotionLegend %x %y]
2134	}
2135	$c delete isoline
2136	set x2 $x
2137	set iw [image width $_image(legend)]
2138	set ih [image height $_image(legend)]
2139	set x1 [expr $x2 - ($iw*12)/10]
2140	set color $_settings(-isolinecolor)
2141	# Draw the isolines on the legend.
2142	array unset _isolines
2143	if { $color != "none" && [info exists _limits($_curFldName)] &&
2144	$_settings(-isolinesvisible) && $_settings(-numcontours) > 0 } {
2145
2146	foreach { vmin vmax } $_limits($_curFldName) break
2147	set range [expr double($vmax - $vmin)]
2148	if { $range <= 0.0 } {
2149	set range 1.0; # Min is greater or equal to max.
2150	}
2151	set tags "isoline legend"
2152	set offset [expr 2 + $lineht]
2153	if { $title != "" } {
2154	incr offset $lineht
2155	}
2156	foreach value $_contourList {
2157	set norm [expr 1.0 - (($value - $vmin) / $range)]
2158	set y1 [expr int(round(($norm * $ih) + $offset))]
2159	for { set off 0 } { $off < 3 } { incr off } {
2160	set _isolines([expr $y1 + $off]) $value
2161	set _isolines([expr $y1 - $off]) $value
2162	}
2163	$c create line $x1 $y1 $x2 $y1 -fill $color -tags $tags
2164	}
2165	}
2166
2167	$c bind title <ButtonPress> [itcl::code $this Combo post]
2168	$c bind title <Enter> [itcl::code $this Combo activate]
2169	$c bind title <Leave> [itcl::code $this Combo deactivate]
2170	# Reset the item coordinates according the current size of the plot.
2171	$c itemconfigure title -text $title
2172	if { [info exists _limits($_curFldName)] } {
2173	foreach { vmin vmax } $_limits($_curFldName) break
2174	$c itemconfigure vmin -text [format %g $vmin]
2175	$c itemconfigure vmax -text [format %g $vmax]
2176	}
2177	set y 2
2178	# If there's a legend title, move the title to the correct position
2179	if { $title != "" } {
2180	$c itemconfigure title -text $title
2181	$c coords title $x $y
2182	incr y $lineht
2183	$c raise title
2184	}
2185	$c coords vmax $x $y
2186	incr y $lineht
2187	$c coords colormap $x $y
2188	$c coords sensor [expr $x - $iw] $y $x [expr $y + $ih]
2189	$c raise sensor
2190	$c coords vmin $x [expr {$h - 2}]
2191	}
2192
2193	# ----------------------------------------------------------------------
2194	# USAGE: _dropdown post
2195	# USAGE: _dropdown unpost
2196	# USAGE: _dropdown select
2197	#
2198	# Used internally to handle the dropdown list for this combobox. The
2199	# post/unpost options are invoked when the list is posted or unposted
2200	# to manage the relief of the controlling button. The select option
2201	# is invoked whenever there is a selection from the list, to assign
2202	# the value back to the gauge.
2203	# ----------------------------------------------------------------------
2204	itcl::body Rappture::VtkSurfaceViewer::Combo {option} {
2205	set c $itk_component(view)
2206	switch -- $option {
2207	post {
2208	foreach { x1 y1 x2 y2 } [$c bbox title] break
2209	set cw [winfo width $itk_component(view)]
2210	set mw [winfo reqwidth $itk_component(fieldmenu)]
2211	set x1 [expr $cw - $mw]
2212	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2213	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2214	tk_popup $itk_component(fieldmenu) $x $y
2215	}
2216	activate {
2217	$c itemconfigure title -fill red
2218	}
2219	deactivate {
2220	$c itemconfigure title -fill $itk_option(-plotforeground)
2221	}
2222	invoke {
2223	$itk_component(field) value $_curFldLabel
2224	AdjustSetting -field
2225	}
2226	default {
2227	error "bad option \"$option\": should be post, unpost, select"
2228	}
2229	}
2230	}
2231
2232	#
2233	# SetCurrentColormap --
2234	#
2235	itcl::body Rappture::VtkSurfaceViewer::SetCurrentColormap { name } {
2236	# Keep track of the colormaps that we build.
2237	if { ![info exists _colormaps($name)] } {
2238	BuildColormap $name
2239	set _colormaps($name) 1
2240	}
2241	set _currentColormap $name
2242	SendCmd "contour2d colormap $_currentColormap"
2243	SendCmd "polydata colormap $_currentColormap"
2244	}
2245
2246	#
2247	# BuildColormap --
2248	#
2249	# Build the designated colormap on the server.
2250	#
2251	itcl::body Rappture::VtkSurfaceViewer::BuildColormap { name } {
2252	set cmap [ColorsToColormap $name]
2253	if { [llength $cmap] == 0 } {
2254	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
2255	}
2256	set wmap "0.0 1.0 1.0 1.0"
2257	SendCmd "colormap add $name { $cmap } { $wmap }"
2258	}
2259
2260	itcl::body Rappture::VtkSurfaceViewer::SetOrientation { side } {
2261	array set positions {
2262	front "1 0 0 0"
2263	back "0 0 1 0"
2264	left "0.707107 0 -0.707107 0"
2265	right "0.707107 0 0.707107 0"
2266	top "0.707107 -0.707107 0 0"
2267	bottom "0.707107 0.707107 0 0"
2268	}
2269	foreach name { qw qx qy qz } value $positions($side) {
2270	set _view($name) $value
2271	}
2272	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2273	$_arcball quaternion $q
2274	SendCmd "camera orient $q"
2275	SendCmd "camera reset"
2276	set _view(xpan) 0
2277	set _view(ypan) 0
2278	set _view(zoom) 1.0
2279	}
2280
2281	itcl::body Rappture::VtkSurfaceViewer::UpdateContourList {} {
2282	if { ![info exists _limits($_curFldName)] } {
2283	return
2284	}
2285	if { $_currentNumContours < 1 } {
2286	set _contourList ""
2287	return
2288	}
2289	foreach { vmin vmax } $_limits($_curFldName) break
2290	set v [blt::vector create \#auto]
2291	$v seq $vmin $vmax [expr $_currentNumContours+2]
2292	$v delete end 0
2293	set _contourList [$v range 0 end]
2294	blt::vector destroy $v
2295	}
2296

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