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source: branches/1.6/gui/scripts/vtksurfaceviewer.tcl @ 6155

Last change on this file since 6155 was 6155, checked in by ldelgass, 8 years ago
merge viewer cleanups from trunk
File size: 78.9 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 Vtkvis server running on a rendering farm,
6	# transmits data, and displays the results.
7	# ======================================================================
8	# AUTHOR: Michael McLennan, Purdue University
9	# Copyright (c) 2004-2016 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 { args } {
42	Rappture::VisViewer::constructor
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	# The following methods are only used by this class.
65	private method AdjustSetting {what {value ""}}
66	private method BuildAxisTab {}
67	private method BuildCameraTab {}
68	private method BuildColormap { name }
69	private method BuildDownloadPopup { widget command }
70	private method BuildSurfaceTab {}
71	private method Combo { option }
72	private method Connect {}
73	private method CurrentDatasets {args}
74	private method Disconnect {}
75	private method DoResize {}
76	private method DoRotate {}
77	private method DrawLegend {}
78	private method EnterLegend { x y }
79	private method EventuallyRequestLegend {}
80	private method EventuallyResize { w h }
81	private method EventuallyRotate { q }
82	private method GetImage { args }
83	private method GetVtkData { args }
84	private method InitSettings { args }
85	private method IsValidObject { dataobj }
86	private method LeaveLegend {}
87	private method MotionLegend { x y }
88	private method Pan {option x y}
89	private method PanCamera {}
90	private method Pick {x y}
91	private method QuaternionToView { q } {
92	foreach { _view(-qw) _view(-qx) _view(-qy) _view(-qz) } $q break
93	}
94	private method Rebuild {}
95	private method ReceiveDataset { args }
96	private method ReceiveImage { args }
97	private method ReceiveLegend { colormap title vmin vmax size }
98	private method RequestLegend {}
99	private method Rotate {option x y}
100	private method SetCurrentColormap { color }
101	private method SetCurrentFieldName { dataobj }
102	private method SetLegendTip { x y }
103	private method SetObjectStyle { dataobj comp }
104	private method SetOrientation { side }
105	private method UpdateContourList {}
106	private method ViewToQuaternion {} {
107	return [list $_view(-qw) $_view(-qx) $_view(-qy) $_view(-qz)]
108	}
109	private method Zoom {option}
110
111	private variable _arcball ""
112
113	private variable _dlist "" ; # list of data objects
114	private variable _obj2ovride ; # maps dataobj => style override
115	private variable _datasets ; # contains all the dataobj-component
116	; # datasets in the server
117	private variable _colormaps ; # contains all the colormaps
118	; # in the server.
119	# The name of the current colormap used. The colormap is global to all
120	# heightmaps displayed.
121	private variable _currentColormap ""
122	private variable _currentNumContours -1
123
124	private variable _click ; # info used for rotate operations
125	private variable _limits ; # autoscale min/max for all axes
126	private variable _view ; # view params for 3D view
127	private variable _settings
128	private variable _changed
129	private variable _reset 1; # Connection to server has been reset.
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	private variable _width 0
137	private variable _height 0
138	private variable _resizePending 0
139	private variable _legendPending 0
140	private variable _rotatePending 0
141	private variable _field ""
142	private variable _colorMode "scalar"; # Mode of colormap (vmag or scalar)
143	private variable _fields
144	private variable _curFldName ""
145	private variable _curFldLabel ""
146
147	private common _downloadPopup; # download options from popup
148	private common _hardcopy
149	}
150
151	itk::usual VtkSurfaceViewer {
152	keep -background -foreground -cursor -font
153	keep -plotbackground -plotforeground
154	}
155
156	# ----------------------------------------------------------------------
157	# CONSTRUCTOR
158	# ----------------------------------------------------------------------
159	itcl::body Rappture::VtkSurfaceViewer::constructor {args} {
160	set _serverType "vtkvis"
161	#DebugOn
162
163	# Rebuild event
164	$_dispatcher register !rebuild
165	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
166
167	# Resize event
168	$_dispatcher register !resize
169	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
170
171	# Legend event
172	$_dispatcher register !legend
173	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
174
175	# Rotate event
176	$_dispatcher register !rotate
177	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
178
179	#
180	# Populate parser with commands handle incoming requests
181	#
182	$_parser alias image [itcl::code $this ReceiveImage]
183	$_parser alias legend [itcl::code $this ReceiveLegend]
184	$_parser alias dataset [itcl::code $this ReceiveDataset]
185
186	# Initialize the view to some default parameters.
187	array set _view {
188	-ortho 0
189	-qw 0.853553
190	-qx -0.353553
191	-qy 0.353553
192	-qz 0.146447
193	-xpan 0
194	-ypan 0
195	-zoom 1.0
196	}
197	set _arcball [blt::arcball create 100 100]
198	$_arcball quaternion [ViewToQuaternion]
199
200	array set _settings {
201	-axesvisible 1
202	-axislabels 1
203	-axisminorticks 1
204	-axismode "static"
205	-background black
206	-colormap BCGYR
207	-colormapvisible 1
208	-field "Default"
209	-isolinecolor white
210	-isolinesvisible 0
211	-legendvisible 1
212	-numcontours 10
213	-outline 0
214	-surfaceedges 0
215	-surfacelighting 1
216	-surfaceopacity 100
217	-surfacevisible 1
218	-surfacewireframe 0
219	-xgrid 0
220	-ygrid 0
221	-zgrid 0
222	}
223	array set _changed {
224	-colormap 0
225	-isolinecolor 0
226	-isolinesvisible 0
227	-numcontours 0
228	-outline 0
229	-surfaceedges 0
230	-surfacelighting 0
231	-surfaceopacity 0
232	-surfacevisible 0
233	-surfacewireframe 0
234	}
235
236	itk_component add view {
237	canvas $itk_component(plotarea).view \
238	-highlightthickness 0 -borderwidth 0
239	} {
240	usual
241	ignore -highlightthickness -borderwidth -background
242	}
243
244	itk_component add fieldmenu {
245	menu $itk_component(plotarea).menu -bg black -fg white -relief flat \
246	-tearoff 0
247	} {
248	usual
249	ignore -background -foreground -relief -tearoff
250	}
251	set c $itk_component(view)
252	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
253	bind $c <4> [itcl::code $this Zoom in 0.25]
254	bind $c <5> [itcl::code $this Zoom out 0.25]
255	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
256	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
257	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
258	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
259	bind $c <Enter> "focus %W"
260	bind $c <Control-F1> [itcl::code $this ToggleConsole]
261
262	# Fix the scrollregion in case we go off screen
263	$c configure -scrollregion [$c bbox all]
264
265	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
266	set _map(cwidth) -1
267	set _map(cheight) -1
268	set _map(zoom) 1.0
269	set _map(original) ""
270
271	set f [$itk_component(main) component controls]
272	itk_component add reset {
273	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
274	-highlightthickness 0 \
275	-image [Rappture::icon reset-view] \
276	-command [itcl::code $this Zoom reset]
277	} {
278	usual
279	ignore -highlightthickness
280	}
281	pack $itk_component(reset) -side top -padx 2 -pady 2
282	Rappture::Tooltip::for $itk_component(reset) \
283	"Reset the view to the default zoom level"
284
285	itk_component add zoomin {
286	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
287	-highlightthickness 0 \
288	-image [Rappture::icon zoom-in] \
289	-command [itcl::code $this Zoom in]
290	} {
291	usual
292	ignore -highlightthickness
293	}
294	pack $itk_component(zoomin) -side top -padx 2 -pady 2
295	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
296
297	itk_component add zoomout {
298	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
299	-highlightthickness 0 \
300	-image [Rappture::icon zoom-out] \
301	-command [itcl::code $this Zoom out]
302	} {
303	usual
304	ignore -highlightthickness
305	}
306	pack $itk_component(zoomout) -side top -padx 2 -pady 2
307	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
308
309	itk_component add surface {
310	Rappture::PushButton $f.surface \
311	-onimage [Rappture::icon volume-on] \
312	-offimage [Rappture::icon volume-off] \
313	-variable [itcl::scope _settings(-surfacevisible)] \
314	-command [itcl::code $this AdjustSetting -surfacevisible]
315	}
316	$itk_component(surface) select
317	Rappture::Tooltip::for $itk_component(surface) \
318	"Hide the surface"
319	pack $itk_component(surface) -padx 2 -pady 2
320
321	if { [catch {
322	BuildSurfaceTab
323	BuildAxisTab
324	BuildCameraTab
325	} errs] != 0 } {
326	puts stderr errs=$errs
327	}
328
329	# Legend
330	set _image(legend) [image create photo]
331	itk_component add legend {
332	canvas $itk_component(plotarea).legend -width 50 -highlightthickness 0
333	} {
334	usual
335	ignore -highlightthickness
336	rename -background -plotbackground plotBackground Background
337	}
338
339	# Hack around the Tk panewindow. The problem is that the requested
340	# size of the 3d view isn't set until an image is retrieved from
341	# the server. So the panewindow uses the tiny size.
342	set w 10000
343	pack forget $itk_component(view)
344	blt::table $itk_component(plotarea) \
345	0,0 $itk_component(view) -fill both -reqwidth $w
346	blt::table configure $itk_component(plotarea) c1 -resize none
347
348	# Bindings for rotation via mouse
349	bind $itk_component(view) <ButtonPress-1> \
350	[itcl::code $this Rotate click %x %y]
351	bind $itk_component(view) <B1-Motion> \
352	[itcl::code $this Rotate drag %x %y]
353	bind $itk_component(view) <ButtonRelease-1> \
354	[itcl::code $this Rotate release %x %y]
355
356	# Bindings for panning via mouse
357	bind $itk_component(view) <ButtonPress-2> \
358	[itcl::code $this Pan click %x %y]
359	bind $itk_component(view) <B2-Motion> \
360	[itcl::code $this Pan drag %x %y]
361	bind $itk_component(view) <ButtonRelease-2> \
362	[itcl::code $this Pan release %x %y]
363
364	#bind $itk_component(view) <ButtonRelease-3> \
365	# [itcl::code $this Pick %x %y]
366
367	# Bindings for panning via keyboard
368	bind $itk_component(view) <KeyPress-Left> \
369	[itcl::code $this Pan set -10 0]
370	bind $itk_component(view) <KeyPress-Right> \
371	[itcl::code $this Pan set 10 0]
372	bind $itk_component(view) <KeyPress-Up> \
373	[itcl::code $this Pan set 0 -10]
374	bind $itk_component(view) <KeyPress-Down> \
375	[itcl::code $this Pan set 0 10]
376	bind $itk_component(view) <Shift-KeyPress-Left> \
377	[itcl::code $this Pan set -2 0]
378	bind $itk_component(view) <Shift-KeyPress-Right> \
379	[itcl::code $this Pan set 2 0]
380	bind $itk_component(view) <Shift-KeyPress-Up> \
381	[itcl::code $this Pan set 0 -2]
382	bind $itk_component(view) <Shift-KeyPress-Down> \
383	[itcl::code $this Pan set 0 2]
384
385	# Bindings for zoom via keyboard
386	bind $itk_component(view) <KeyPress-Prior> \
387	[itcl::code $this Zoom out]
388	bind $itk_component(view) <KeyPress-Next> \
389	[itcl::code $this Zoom in]
390
391	bind $itk_component(view) <Enter> "focus $itk_component(view)"
392
393	if {[string equal "x11" [tk windowingsystem]]} {
394	# Bindings for zoom via mouse
395	bind $itk_component(view) <4> [itcl::code $this Zoom out]
396	bind $itk_component(view) <5> [itcl::code $this Zoom in]
397	}
398
399	set _image(download) [image create photo]
400
401	eval itk_initialize $args
402
403	EnableWaitDialog 900
404	Connect
405	}
406
407	# ----------------------------------------------------------------------
408	# DESTRUCTOR
409	# ----------------------------------------------------------------------
410	itcl::body Rappture::VtkSurfaceViewer::destructor {} {
411	Disconnect
412	image delete $_image(plot)
413	image delete $_image(download)
414	catch { blt::arcball destroy $_arcball }
415	}
416
417	itcl::body Rappture::VtkSurfaceViewer::DoResize {} {
418	if { $_width < 2 } {
419	set _width 500
420	}
421	if { $_height < 2 } {
422	set _height 500
423	}
424	set _start [clock clicks -milliseconds]
425	SendCmd "screen size $_width $_height"
426
427	EventuallyRequestLegend
428	set _resizePending 0
429	}
430
431	itcl::body Rappture::VtkSurfaceViewer::DoRotate {} {
432	SendCmd "camera orient [ViewToQuaternion]"
433	set _rotatePending 0
434	}
435
436	itcl::body Rappture::VtkSurfaceViewer::EventuallyRequestLegend {} {
437	if { !$_legendPending } {
438	set _legendPending 1
439	$_dispatcher event -idle !legend
440	}
441	}
442
443	itcl::body Rappture::VtkSurfaceViewer::EventuallyResize { w h } {
444	set _width $w
445	set _height $h
446	$_arcball resize $w $h
447	if { !$_resizePending } {
448	set _resizePending 1
449	$_dispatcher event -after 400 !resize
450	}
451	}
452
453	set rotate_delay 100
454
455	itcl::body Rappture::VtkSurfaceViewer::EventuallyRotate { q } {
456	QuaternionToView $q
457	if { !$_rotatePending } {
458	set _rotatePending 1
459	global rotate_delay
460	$_dispatcher event -after $rotate_delay !rotate
461	}
462	}
463
464	# ----------------------------------------------------------------------
465	# USAGE: add <dataobj> ?<settings>?
466	#
467	# Clients use this to add a data object to the plot. The optional
468	# <settings> are used to configure the plot. Allowed settings are
469	# -color, -brightness, -width, -linestyle, and -raise.
470	# ----------------------------------------------------------------------
471	itcl::body Rappture::VtkSurfaceViewer::add {dataobj {settings ""}} {
472	if { ![$dataobj isvalid] } {
473	return; # Object doesn't contain valid data.
474	}
475	array set params {
476	-color auto
477	-width 1
478	-linestyle solid
479	-brightness 0
480	-raise 0
481	-description ""
482	-param ""
483	-type ""
484	}
485	array set params $settings
486	set params(-description) ""
487	set params(-param) ""
488	array set params $settings
489
490	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
491	# can't handle -autocolors yet
492	set params(-color) black
493	}
494	set pos [lsearch -exact $_dlist $dataobj]
495	if {$pos < 0} {
496	lappend _dlist $dataobj
497	}
498	set _obj2ovride($dataobj-color) $params(-color)
499	set _obj2ovride($dataobj-width) $params(-width)
500	set _obj2ovride($dataobj-raise) $params(-raise)
501	$_dispatcher event -idle !rebuild
502	}
503
504	# ----------------------------------------------------------------------
505	# USAGE: delete ?<dataobj1> <dataobj2> ...?
506	#
507	# Clients use this to delete a dataobj from the plot. If no dataobjs
508	# are specified, then all dataobjs are deleted. No data objects are
509	# deleted. They are only removed from the display list.
510	# ----------------------------------------------------------------------
511	itcl::body Rappture::VtkSurfaceViewer::delete {args} {
512	if { [llength $args] == 0} {
513	set args $_dlist
514	}
515	# Delete all specified dataobjs
516	set changed 0
517	foreach dataobj $args {
518	set pos [lsearch -exact $_dlist $dataobj]
519	if { $pos < 0 } {
520	continue; # Don't know anything about it.
521	}
522	# Remove it from the dataobj list.
523	set _dlist [lreplace $_dlist $pos $pos]
524	array unset _obj2ovride $dataobj-*
525	array unset _settings $dataobj-*
526	set changed 1
527	}
528	# If anything changed, then rebuild the plot
529	if { $changed } {
530	$_dispatcher event -idle !rebuild
531	}
532	}
533
534	# ----------------------------------------------------------------------
535	# USAGE: get ?-objects?
536	# USAGE: get ?-visible?
537	# USAGE: get ?-image view?
538	#
539	# Clients use this to query the list of objects being plotted, in
540	# order from bottom to top of this result. The optional "-image"
541	# flag can also request the internal images being shown.
542	# ----------------------------------------------------------------------
543	itcl::body Rappture::VtkSurfaceViewer::get {args} {
544	if {[llength $args] == 0} {
545	set args "-objects"
546	}
547
548	set op [lindex $args 0]
549	switch -- $op {
550	"-objects" {
551	# put the dataobj list in order according to -raise options
552	set dlist {}
553	foreach dataobj $_dlist {
554	if { ![IsValidObject $dataobj] } {
555	continue
556	}
557	if {[info exists _obj2ovride($dataobj-raise)] &&
558	$_obj2ovride($dataobj-raise)} {
559	set dlist [linsert $dlist 0 $dataobj]
560	} else {
561	lappend dlist $dataobj
562	}
563	}
564	return $dlist
565	}
566	"-visible" {
567	set dlist {}
568	foreach dataobj $_dlist {
569	if { ![IsValidObject $dataobj] } {
570	continue
571	}
572	if { ![info exists _obj2ovride($dataobj-raise)] } {
573	# No setting indicates that the object isn't visible.
574	continue
575	}
576	# Otherwise use the -raise parameter to put the object to
577	# the front of the list.
578	if { $_obj2ovride($dataobj-raise) } {
579	set dlist [linsert $dlist 0 $dataobj]
580	} else {
581	lappend dlist $dataobj
582	}
583	}
584	return $dlist
585	}
586	-image {
587	if {[llength $args] != 2} {
588	error "wrong # args: should be \"get -image view\""
589	}
590	switch -- [lindex $args end] {
591	view {
592	return $_image(plot)
593	}
594	default {
595	error "bad image name \"[lindex $args end]\": should be view"
596	}
597	}
598	}
599	default {
600	error "bad option \"$op\": should be -objects or -image"
601	}
602	}
603	}
604
605	# ----------------------------------------------------------------------
606	# USAGE: scale ?<data1> <data2> ...?
607	#
608	# Sets the default limits for the overall plot according to the
609	# limits of the data for all of the given <data> objects. This
610	# accounts for all objects--even those not showing on the screen.
611	# Because of this, the limits are appropriate for all objects as
612	# the user scans through data in the ResultSet viewer.
613	# ----------------------------------------------------------------------
614	itcl::body Rappture::VtkSurfaceViewer::scale { args } {
615	foreach dataobj $args {
616	if { ![$dataobj isvalid] } {
617	continue; # Object doesn't contain valid data.
618	}
619	foreach axis { x y z } {
620	set lim [$dataobj limits $axis]
621	if { ![info exists _limits($axis)] } {
622	set _limits($axis) $lim
623	continue
624	}
625	foreach {min max} $lim break
626	foreach {amin amax} $_limits($axis) break
627	if { $amin > $min } {
628	set amin $min
629	}
630	if { $amax < $max } {
631	set amax $max
632	}
633	set _limits($axis) [list $amin $amax]
634	}
635	foreach { fname lim } [$dataobj fieldlimits] {
636	if { ![info exists _limits($fname)] } {
637	set _limits($fname) $lim
638	continue
639	}
640	foreach {min max} $lim break
641	foreach {fmin fmax} $_limits($fname) break
642	if { $fmin > $min } {
643	set fmin $min
644	}
645	if { $fmax < $max } {
646	set fmax $max
647	}
648	set _limits($fname) [list $fmin $fmax]
649	}
650	}
651	}
652
653	# ----------------------------------------------------------------------
654	# USAGE: download coming
655	# USAGE: download controls <downloadCommand>
656	# USAGE: download now
657	#
658	# Clients use this method to create a downloadable representation
659	# of the plot. Returns a list of the form {ext string}, where
660	# "ext" is the file extension (indicating the type of data) and
661	# "string" is the data itself.
662	# ----------------------------------------------------------------------
663	itcl::body Rappture::VtkSurfaceViewer::download {option args} {
664	switch $option {
665	coming {
666	if {[catch {
667	blt::winop snap $itk_component(plotarea) $_image(download)
668	}]} {
669	$_image(download) configure -width 1 -height 1
670	$_image(download) put #000000
671	}
672	}
673	controls {
674	set popup .vtkviewerdownload
675	if { ![winfo exists .vtkviewerdownload] } {
676	set inner [BuildDownloadPopup $popup [lindex $args 0]]
677	} else {
678	set inner [$popup component inner]
679	}
680	set _downloadPopup(image_controls) $inner.image_frame
681	set num [llength [get]]
682	set num [expr {($num == 1) ? "1 result" : "$num results"}]
683	set word [Rappture::filexfer::label downloadWord]
684	$inner.summary configure -text "$word $num in the following format:"
685	update idletasks ;# Fix initial sizes
686	return $popup
687	}
688	now {
689	set popup .vtkviewerdownload
690	if {[winfo exists .vtkviewerdownload]} {
691	$popup deactivate
692	}
693	switch -- $_downloadPopup(format) {
694	"image" {
695	return [$this GetImage [lindex $args 0]]
696	}
697	"vtk" {
698	return [$this GetVtkData [lindex $args 0]]
699	}
700	}
701	return ""
702	}
703	default {
704	error "bad option \"$option\": should be coming, controls, now"
705	}
706	}
707	}
708
709	# ----------------------------------------------------------------------
710	# USAGE: Connect ?<host:port>,<host:port>...?
711	#
712	# Clients use this method to establish a connection to a new
713	# server, or to reestablish a connection to the previous server.
714	# Any existing connection is automatically closed.
715	# ----------------------------------------------------------------------
716	itcl::body Rappture::VtkSurfaceViewer::Connect {} {
717	set _hosts [GetServerList "vtkvis"]
718	if { "" == $_hosts } {
719	return 0
720	}
721	set _reset 1
722	set result [VisViewer::Connect $_hosts]
723	if { $result } {
724	if { $_reportClientInfo } {
725	# Tell the server the viewer, hub, user and session.
726	# Do this immediately on connect before buffering any commands
727	global env
728
729	set info {}
730	set user "???"
731	if { [info exists env(USER)] } {
732	set user $env(USER)
733	}
734	set session "???"
735	if { [info exists env(SESSION)] } {
736	set session $env(SESSION)
737	}
738	lappend info "version" "$Rappture::version"
739	lappend info "build" "$Rappture::build"
740	lappend info "svnurl" "$Rappture::svnurl"
741	lappend info "installdir" "$Rappture::installdir"
742	lappend info "hub" [exec hostname]
743	lappend info "client" "vtksurfaceviewer"
744	lappend info "user" $user
745	lappend info "session" $session
746	SendCmd "clientinfo [list $info]"
747	}
748
749	set w [winfo width $itk_component(view)]
750	set h [winfo height $itk_component(view)]
751	EventuallyResize $w $h
752	}
753	return $result
754	}
755
756	#
757	# isconnected --
758	#
759	# Indicates if we are currently connected to the visualization server.
760	#
761	itcl::body Rappture::VtkSurfaceViewer::isconnected {} {
762	return [VisViewer::IsConnected]
763	}
764
765	#
766	# disconnect --
767	#
768	itcl::body Rappture::VtkSurfaceViewer::disconnect {} {
769	Disconnect
770	set _reset 1
771	}
772
773	#
774	# Disconnect --
775	#
776	# Clients use this method to disconnect from the current rendering server.
777	#
778	itcl::body Rappture::VtkSurfaceViewer::Disconnect {} {
779	VisViewer::Disconnect
780
781	$_dispatcher cancel !rebuild
782	$_dispatcher cancel !resize
783	$_dispatcher cancel !rotate
784	$_dispatcher cancel !legend
785	# disconnected -- no more data sitting on server
786	array unset _datasets
787	array unset _colormaps
788	}
789
790	# ----------------------------------------------------------------------
791	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
792	#
793	# Invoked automatically whenever the "image" command comes in from
794	# the rendering server. Indicates that binary image data with the
795	# specified <size> will follow.
796	# ----------------------------------------------------------------------
797	itcl::body Rappture::VtkSurfaceViewer::ReceiveImage { args } {
798	array set info {
799	-token "???"
800	-bytes 0
801	-type image
802	}
803	array set info $args
804	set bytes [ReceiveBytes $info(-bytes)]
805	if { $info(-type) == "image" } {
806	if 0 {
807	set f [open "last.ppm" "w"]
808	fconfigure $f -encoding binary
809	puts -nonewline $f $bytes
810	close $f
811	}
812	$_image(plot) configure -data $bytes
813	#set time [clock seconds]
814	#set date [clock format $time]
815	#set w [image width $_image(plot)]
816	#set h [image height $_image(plot)]
817	#puts stderr "$date: received image ${w}x${h} image"
818	if { $_start > 0 } {
819	set finish [clock clicks -milliseconds]
820	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
821	set _start 0
822	}
823	} elseif { $info(type) == "print" } {
824	set tag $this-print-$info(-token)
825	set _hardcopy($tag) $bytes
826	}
827	}
828
829	#
830	# ReceiveDataset --
831	#
832	itcl::body Rappture::VtkSurfaceViewer::ReceiveDataset { args } {
833	if { ![isconnected] } {
834	return
835	}
836	set option [lindex $args 0]
837	switch -- $option {
838	"scalar" {
839	set option [lindex $args 1]
840	switch -- $option {
841	"world" {
842	foreach { x y z value tag } [lrange $args 2 end] break
843	}
844	"pixel" {
845	foreach { x y value tag } [lrange $args 2 end] break
846	}
847	}
848	}
849	"vector" {
850	set option [lindex $args 1]
851	switch -- $option {
852	"world" {
853	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
854	}
855	"pixel" {
856	foreach { x y vx vy vz tag } [lrange $args 2 end] break
857	}
858	}
859	}
860	"names" {
861	foreach { name } [lindex $args 1] {
862	#puts stderr "Dataset: $name"
863	}
864	}
865	default {
866	error "unknown dataset option \"$option\" from server"
867	}
868	}
869	}
870
871	# ----------------------------------------------------------------------
872	# USAGE: Rebuild
873	#
874	# Called automatically whenever something changes that affects the
875	# data in the widget. Clears any existing data and rebuilds the
876	# widget to display new data.
877	# ----------------------------------------------------------------------
878	itcl::body Rappture::VtkSurfaceViewer::Rebuild {} {
879	set w [winfo width $itk_component(view)]
880	set h [winfo height $itk_component(view)]
881	if { $w < 2 \|\| $h < 2 } {
882	update
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	# Reset the camera and other view parameters
898	$_arcball quaternion [ViewToQuaternion]
899	if {$_view(-ortho)} {
900	SendCmd "camera mode ortho"
901	} else {
902	SendCmd "camera mode persp"
903	}
904	DoRotate
905	PanCamera
906	set _first ""
907	InitSettings -background \
908	-xgrid -ygrid -zgrid -axismode \
909	-axesvisible -axislabels -axisminorticks
910	#SendCmd "axis lformat all %g"
911	StopBufferingCommands
912	SendCmd "imgflush"
913	StartBufferingCommands
914	}
915	set _first ""
916	SendCmd "dataset visible 0"
917	eval scale $_dlist
918	foreach dataobj [get -objects] {
919	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
920	set _first $dataobj
921	SetCurrentFieldName $dataobj
922	}
923	foreach comp [$dataobj components] {
924	set tag $dataobj-$comp
925	if { ![info exists _datasets($tag)] } {
926	set bytes [$dataobj vtkdata $comp]
927	if 0 {
928	set f [open "/tmp/surface.vtk" "w"]
929	fconfigure $f -translation binary -encoding binary
930	puts -nonewline $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	SendCmd "dataset add $tag data follows $length"
947	SendData $bytes
948	set _datasets($tag) 1
949	SetObjectStyle $dataobj $comp
950	}
951	if { [info exists _obj2ovride($dataobj-raise)] } {
952	SendCmd "polydata visible 1 $tag"
953	}
954	}
955	}
956
957	InitSettings -isolinesvisible -surfacevisible -outline
958	if { $_reset } {
959	# These are settings that rely on a dataset being loaded.
960	InitSettings \
961	-surfacelighting \
962	-field \
963	-surfaceedges -surfacelighting -surfaceopacity \
964	-surfacewireframe \
965	-numcontours
966
967	Zoom reset
968	foreach axis { x y z } {
969	set label ""
970	if { $_first != "" } {
971	set label [$_first hints ${axis}label]
972	}
973	if { $label == "" } {
974	set label [string toupper $axis]
975	}
976	# There may be a space in the axis label.
977	SendCmd [list axis name $axis $label]
978	}
979	if { [array size _fields] < 2 } {
980	catch {blt::table forget $itk_component(field) $itk_component(field_l)}
981	}
982	set _reset 0
983	}
984	# Redraw the legend even if we're using the same colormap. The position
985	# of the isolines may have changed because the range of data changed.
986	DrawLegend
987
988	# Actually write the commands to the server socket. If it fails, we don't
989	# care. We're finished here.
990	blt::busy hold $itk_component(hull)
991	StopBufferingCommands; # Turn off buffering and send commands.
992	blt::busy release $itk_component(hull)
993	}
994
995	# ----------------------------------------------------------------------
996	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
997	#
998	# Returns a list of server IDs for the current datasets being displayed. This
999	# is normally a single ID, but it might be a list of IDs if the current data
1000	# object has multiple components.
1001	# ----------------------------------------------------------------------
1002	itcl::body Rappture::VtkSurfaceViewer::CurrentDatasets {args} {
1003	set flag [lindex $args 0]
1004	switch -- $flag {
1005	"-all" {
1006	if { [llength $args] > 1 } {
1007	error "CurrentDatasets: can't specify dataobj after \"-all\""
1008	}
1009	set dlist [get -objects]
1010	}
1011	"-visible" {
1012	if { [llength $args] > 1 } {
1013	set dlist {}
1014	set args [lrange $args 1 end]
1015	foreach dataobj $args {
1016	if { [info exists _obj2ovride($dataobj-raise)] } {
1017	lappend dlist $dataobj
1018	}
1019	}
1020	} else {
1021	set dlist [get -visible]
1022	}
1023	}
1024	default {
1025	set dlist $args
1026	}
1027	}
1028	set rlist ""
1029	foreach dataobj $dlist {
1030	foreach comp [$dataobj components] {
1031	set tag $dataobj-$comp
1032	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1033	lappend rlist $tag
1034	}
1035	}
1036	}
1037	return $rlist
1038	}
1039
1040	# ----------------------------------------------------------------------
1041	# USAGE: Zoom in
1042	# USAGE: Zoom out
1043	# USAGE: Zoom reset
1044	#
1045	# Called automatically when the user clicks on one of the zoom
1046	# controls for this widget. Changes the zoom for the current view.
1047	# ----------------------------------------------------------------------
1048	itcl::body Rappture::VtkSurfaceViewer::Zoom {option} {
1049	switch -- $option {
1050	"in" {
1051	set _view(-zoom) [expr {$_view(-zoom)*1.25}]
1052	SendCmd "camera zoom $_view(-zoom)"
1053	}
1054	"out" {
1055	set _view(-zoom) [expr {$_view(-zoom)*0.8}]
1056	SendCmd "camera zoom $_view(-zoom)"
1057	}
1058	"reset" {
1059	array set _view {
1060	-qw 0.853553
1061	-qx -0.353553
1062	-qy 0.353553
1063	-qz 0.146447
1064	-xpan 0
1065	-ypan 0
1066	-zoom 1.0
1067	}
1068	if { $_first != "" } {
1069	set location [$_first hints camera]
1070	if { $location != "" } {
1071	array set _view $location
1072	}
1073	}
1074	$_arcball quaternion [ViewToQuaternion]
1075	DoRotate
1076	SendCmd "camera reset"
1077	}
1078	}
1079	}
1080
1081	itcl::body Rappture::VtkSurfaceViewer::PanCamera {} {
1082	set x $_view(-xpan)
1083	set y $_view(-ypan)
1084	SendCmd "camera pan $x $y"
1085	}
1086
1087	# ----------------------------------------------------------------------
1088	# USAGE: Rotate click <x> <y>
1089	# USAGE: Rotate drag <x> <y>
1090	# USAGE: Rotate release <x> <y>
1091	#
1092	# Called automatically when the user clicks/drags/releases in the
1093	# plot area. Moves the plot according to the user's actions.
1094	# ----------------------------------------------------------------------
1095	itcl::body Rappture::VtkSurfaceViewer::Rotate {option x y} {
1096	switch -- $option {
1097	"click" {
1098	$itk_component(view) configure -cursor fleur
1099	set _click(x) $x
1100	set _click(y) $y
1101	}
1102	"drag" {
1103	if {[array size _click] == 0} {
1104	Rotate click $x $y
1105	} else {
1106	set w [winfo width $itk_component(view)]
1107	set h [winfo height $itk_component(view)]
1108	if {$w <= 0 \|\| $h <= 0} {
1109	return
1110	}
1111
1112	if {[catch {
1113	# this fails sometimes for no apparent reason
1114	set dx [expr {double($x-$_click(x))/$w}]
1115	set dy [expr {double($y-$_click(y))/$h}]
1116	}]} {
1117	return
1118	}
1119	if { $dx == 0 && $dy == 0 } {
1120	return
1121	}
1122	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1123	EventuallyRotate $q
1124	set _click(x) $x
1125	set _click(y) $y
1126	}
1127	}
1128	"release" {
1129	Rotate drag $x $y
1130	$itk_component(view) configure -cursor ""
1131	catch {unset _click}
1132	}
1133	default {
1134	error "bad option \"$option\": should be click, drag, release"
1135	}
1136	}
1137	}
1138
1139	itcl::body Rappture::VtkSurfaceViewer::Pick {x y} {
1140	foreach tag [CurrentDatasets -visible] {
1141	SendCmd "dataset getscalar pixel $x $y $tag"
1142	}
1143	}
1144
1145	# ----------------------------------------------------------------------
1146	# USAGE: $this Pan click x y
1147	# $this Pan drag x y
1148	# $this Pan release x y
1149	#
1150	# Called automatically when the user clicks on one of the zoom
1151	# controls for this widget. Changes the zoom for the current view.
1152	# ----------------------------------------------------------------------
1153	itcl::body Rappture::VtkSurfaceViewer::Pan {option x y} {
1154	switch -- $option {
1155	"set" {
1156	set w [winfo width $itk_component(view)]
1157	set h [winfo height $itk_component(view)]
1158	set x [expr $x / double($w)]
1159	set y [expr $y / double($h)]
1160	set _view(-xpan) [expr $_view(-xpan) + $x]
1161	set _view(-ypan) [expr $_view(-ypan) + $y]
1162	PanCamera
1163	return
1164	}
1165	"click" {
1166	set _click(x) $x
1167	set _click(y) $y
1168	$itk_component(view) configure -cursor hand1
1169	}
1170	"drag" {
1171	if { ![info exists _click(x)] } {
1172	set _click(x) $x
1173	}
1174	if { ![info exists _click(y)] } {
1175	set _click(y) $y
1176	}
1177	set w [winfo width $itk_component(view)]
1178	set h [winfo height $itk_component(view)]
1179	set dx [expr ($_click(x) - $x)/double($w)]
1180	set dy [expr ($_click(y) - $y)/double($h)]
1181	set _click(x) $x
1182	set _click(y) $y
1183	set _view(-xpan) [expr $_view(-xpan) - $dx]
1184	set _view(-ypan) [expr $_view(-ypan) - $dy]
1185	PanCamera
1186	}
1187	"release" {
1188	Pan drag $x $y
1189	$itk_component(view) configure -cursor ""
1190	}
1191	default {
1192	error "unknown option \"$option\": should set, click, drag, or release"
1193	}
1194	}
1195	}
1196
1197	# ----------------------------------------------------------------------
1198	# USAGE: InitSettings <what> ?<value>?
1199	#
1200	# Used internally to update rendering settings whenever parameters
1201	# change in the popup settings panel. Sends the new settings off
1202	# to the back end.
1203	# ----------------------------------------------------------------------
1204	itcl::body Rappture::VtkSurfaceViewer::InitSettings { args } {
1205	foreach spec $args {
1206	if { [info exists _settings($_first${spec})] } {
1207	# Reset global setting with dataobj specific setting
1208	set _settings($spec) $_settings($_first${spec})
1209	}
1210	AdjustSetting $spec
1211	}
1212	}
1213
1214	#
1215	# AdjustSetting --
1216	#
1217	# Changes/updates a specific setting in the widget. There are
1218	# usually user-setable option. Commands are sent to the render
1219	# server.
1220	#
1221	itcl::body Rappture::VtkSurfaceViewer::AdjustSetting {what {value ""}} {
1222	if { ![isconnected] } {
1223	return
1224	}
1225	switch -- $what {
1226	"-axesvisible" {
1227	set bool $_settings($what)
1228	SendCmd "axis visible all $bool"
1229	}
1230	"-axislabels" {
1231	set bool $_settings($what)
1232	SendCmd "axis labels all $bool"
1233	}
1234	"-axisminorticks" {
1235	set bool $_settings($what)
1236	SendCmd "axis minticks all $bool"
1237	}
1238	"-axismode" {
1239	set mode [$itk_component(axisMode) value]
1240	set mode [$itk_component(axisMode) translate $mode]
1241	set _settings($what) $mode
1242	SendCmd "axis flymode $mode"
1243	}
1244	"-background" {
1245	set bgcolor [$itk_component(background) value]
1246	array set fgcolors {
1247	"black" "white"
1248	"white" "black"
1249	"grey" "black"
1250	}
1251	configure -plotbackground $bgcolor \
1252	-plotforeground $fgcolors($bgcolor)
1253	$itk_component(view) delete "legend"
1254	DrawLegend
1255	}
1256	"-colormap" {
1257	set _changed($what) 1
1258	StartBufferingCommands
1259	set color [$itk_component(colormap) value]
1260	set _settings($what) $color
1261	if { $color == "none" } {
1262	if { $_settings(-colormapvisible) } {
1263	SendCmd "contour2d colormode constant {}"
1264	SendCmd "polydata colormode constant {}"
1265	set _settings(-colormapvisible) 0
1266	}
1267	} else {
1268	if { !$_settings(-colormapvisible) } {
1269	#SendCmd "contour2d colormode $_colorMode $_curFldName"
1270	SendCmd "polydata colormode $_colorMode $_curFldName"
1271	set _settings(-colormapvisible) 1
1272	}
1273	SetCurrentColormap $color
1274	if {$_settings(-colormapdiscrete)} {
1275	set numColors [expr $_settings(-numcontours) + 1]
1276	SendCmd "colormap res $numColors $color"
1277	}
1278	}
1279	StopBufferingCommands
1280	EventuallyRequestLegend
1281	}
1282	"-colormapdiscrete" {
1283	set bool $_settings($what)
1284	set numColors [expr $_settings(-numcontours) + 1]
1285	StartBufferingCommands
1286	if {$bool} {
1287	SendCmd "colormap res $numColors"
1288	# Discrete colormap requires preinterp on
1289	SendCmd "polydata preinterp on"
1290	} else {
1291	SendCmd "colormap res default"
1292	# FIXME: add setting for preinterp (default on)
1293	SendCmd "polydata preinterp on"
1294	}
1295	StopBufferingCommands
1296	EventuallyRequestLegend
1297	}
1298	"-field" {
1299	set label [$itk_component(field) value]
1300	set fname [$itk_component(field) translate $label]
1301	set _settings($what) $fname
1302	if { [info exists _fields($fname)] } {
1303	foreach { label units components } $_fields($fname) break
1304	if { $components > 1 } {
1305	set _colorMode vmag
1306	} else {
1307	set _colorMode scalar
1308	}
1309	set _curFldName $fname
1310	set _curFldLabel $label
1311	} else {
1312	puts stderr "unknown field \"$fname\""
1313	return
1314	}
1315	SendCmd "dataset scalar $_curFldName"
1316	if { ![info exists _limits($_curFldName)] } {
1317	SendCmd "dataset maprange all"
1318	} else {
1319	SendCmd "dataset maprange explicit $_limits($_curFldName) $_curFldName"
1320	}
1321	#SendCmd "contour2d colormode $_colorMode $_curFldName"
1322	SendCmd "polydata colormode $_colorMode $_curFldName"
1323	UpdateContourList
1324	SendCmd "contour2d contourlist [list $_contourList]"
1325	SendCmd "camera reset"
1326	DrawLegend
1327	}
1328	"-isolinecolor" {
1329	set _changed($what) 1
1330	set color [$itk_component(isolineColor) value]
1331	set _settings($what) $color
1332	SendCmd "contour2d linecolor [Color2RGB $color]"
1333	DrawLegend
1334	}
1335	"-isolinesvisible" {
1336	set _changed($what) 1
1337	set bool $_settings($what)
1338	SendCmd "contour2d visible 0"
1339	if { $bool } {
1340	foreach tag [CurrentDatasets -visible] {
1341	SendCmd "contour2d visible $bool $tag"
1342	}
1343	}
1344	DrawLegend
1345	}
1346	"-legendvisible" {
1347	if { !$_settings($what) } {
1348	$itk_component(view) delete legend
1349	}
1350	DrawLegend
1351	}
1352	"-numcontours" {
1353	set _settings($what) [$itk_component(numcontours) value]
1354	set _currentNumContours $_settings($what)
1355	UpdateContourList
1356	set _changed($what) 1
1357	SendCmd "contour2d contourlist [list $_contourList]"
1358	if {$_settings(-colormapdiscrete)} {
1359	set numColors [expr $_settings($what) + 1]
1360	SendCmd "colormap res $numColors"
1361	EventuallyRequestLegend
1362	} else {
1363	DrawLegend
1364	}
1365	}
1366	"-outline" {
1367	set _changed($what) 1
1368	set bool $_settings($what)
1369	SendCmd "outline visible 0"
1370	if { $bool } {
1371	foreach tag [CurrentDatasets -visible] {
1372	SendCmd "outline visible $bool $tag"
1373	}
1374	}
1375	}
1376	"-surfaceedges" {
1377	set _changed($what) 1
1378	set bool $_settings($what)
1379	SendCmd "polydata edges $bool"
1380	}
1381	"-surfacelighting" {
1382	set _changed($what) 1
1383	set bool $_settings($what)
1384	SendCmd "polydata lighting $bool"
1385	}
1386	"-surfaceopacity" {
1387	set _changed($what) 1
1388	set val $_settings($what)
1389	set sval [expr { 0.01 * double($val) }]
1390	SendCmd "polydata opacity $sval"
1391	}
1392	"-surfacevisible" {
1393	set _changed($what) 1
1394	set bool $_settings($what)
1395	SendCmd "polydata visible 0"
1396	if { $bool } {
1397	foreach tag [CurrentDatasets -visible] {
1398	SendCmd "polydata visible $bool $tag"
1399	}
1400	Rappture::Tooltip::for $itk_component(surface) \
1401	"Hide the surface"
1402	} else {
1403	Rappture::Tooltip::for $itk_component(surface) \
1404	"Show the surface"
1405	}
1406	DrawLegend
1407	}
1408	"-surfacewireframe" {
1409	set _changed($what) 1
1410	set bool $_settings($what)
1411	SendCmd "polydata wireframe $bool"
1412	}
1413	"-xgrid" - "-ygrid" - "-zgrid" {
1414	set axis [string tolower [string range $what 1 1]]
1415	set bool $_settings($what)
1416	SendCmd "axis grid $axis $bool"
1417	}
1418	default {
1419	error "don't know how to fix $what"
1420	}
1421	}
1422	}
1423
1424	#
1425	# RequestLegend --
1426	#
1427	# Request a new legend from the server. The size of the legend
1428	# is determined from the height of the canvas.
1429	#
1430	# This should be called when
1431	# 1. A new current colormap is set.
1432	# 2. Window is resized.
1433	# 3. The limits of the data have changed. (Just need a redraw).
1434	# 4. Number of isolines have changed. (Just need a redraw).
1435	# 5. Legend becomes visible (Just need a redraw).
1436	#
1437	itcl::body Rappture::VtkSurfaceViewer::RequestLegend {} {
1438	set _legendPending 0
1439	if { ![info exists _fields($_curFldName)] } {
1440	return
1441	}
1442	set fname $_curFldName
1443	set font "Arial 8"
1444	set lineht [font metrics $font -linespace]
1445	set w 12
1446	set h [expr {$_height - 2 * ($lineht + 2)}]
1447	if { $h < 1 } {
1448	return
1449	}
1450	if { [string match "component*" $fname] } {
1451	set title ""
1452	} else {
1453	if { [info exists _fields($fname)] } {
1454	foreach { title units } $_fields($fname) break
1455	if { $units != "" } {
1456	set title [format "%s (%s)" $title $units]
1457	}
1458	} else {
1459	set title $fname
1460	}
1461	}
1462	# If there's a title too, subtract one more line
1463	if { $title != "" } {
1464	incr h -$lineht
1465	}
1466	# Set the legend on the first dataset.
1467	if { $_currentColormap != "" } {
1468	set cmap $_currentColormap
1469	if { ![info exists _colormaps($cmap)] } {
1470	BuildColormap $cmap
1471	set _colormaps($cmap) 1
1472	}
1473	#SendCmd "legend $cmap scalar $_curFldName {} $w $h 0"
1474	SendCmd "legend2 $cmap $w $h"
1475	}
1476	}
1477
1478	# ----------------------------------------------------------------------
1479	# CONFIGURATION OPTION: -plotbackground
1480	# ----------------------------------------------------------------------
1481	itcl::configbody Rappture::VtkSurfaceViewer::plotbackground {
1482	if { [isconnected] } {
1483	set rgb [Color2RGB $itk_option(-plotbackground)]
1484	SendCmd "screen bgcolor $rgb"
1485	}
1486	}
1487
1488	# ----------------------------------------------------------------------
1489	# CONFIGURATION OPTION: -plotforeground
1490	# ----------------------------------------------------------------------
1491	itcl::configbody Rappture::VtkSurfaceViewer::plotforeground {
1492	if { [isconnected] } {
1493	set rgb [Color2RGB $itk_option(-plotforeground)]
1494	SendCmd "axis color all $rgb"
1495	SendCmd "outline color $rgb"
1496	}
1497	}
1498
1499	itcl::body Rappture::VtkSurfaceViewer::BuildSurfaceTab {} {
1500
1501	set fg [option get $itk_component(hull) font Font]
1502	#set bfg [option get $itk_component(hull) boldFont Font]
1503
1504	set inner [$itk_component(main) insert end \
1505	-title "Surface Settings" \
1506	-icon [Rappture::icon volume-on]]
1507	$inner configure -borderwidth 4
1508
1509	checkbutton $inner.surface \
1510	-text "Surface" \
1511	-variable [itcl::scope _settings(-surfacevisible)] \
1512	-command [itcl::code $this AdjustSetting -surfacevisible] \
1513	-font "Arial 9"
1514
1515	checkbutton $inner.isolines \
1516	-text "Isolines" \
1517	-variable [itcl::scope _settings(-isolinesvisible)] \
1518	-command [itcl::code $this AdjustSetting -isolinesvisible] \
1519	-font "Arial 9"
1520
1521	checkbutton $inner.colormapDiscrete \
1522	-text "Discrete Colormap" \
1523	-variable [itcl::scope _settings(-colormapdiscrete)] \
1524	-command [itcl::code $this AdjustSetting -colormapdiscrete] \
1525	-font "Arial 9"
1526
1527	checkbutton $inner.wireframe \
1528	-text "Wireframe" \
1529	-variable [itcl::scope _settings(-surfacewireframe)] \
1530	-command [itcl::code $this AdjustSetting -surfacewireframe] \
1531	-font "Arial 9"
1532
1533	checkbutton $inner.lighting \
1534	-text "Enable Lighting" \
1535	-variable [itcl::scope _settings(-surfacelighting)] \
1536	-command [itcl::code $this AdjustSetting -surfacelighting] \
1537	-font "Arial 9"
1538
1539	checkbutton $inner.edges \
1540	-text "Edges" \
1541	-variable [itcl::scope _settings(-surfaceedges)] \
1542	-command [itcl::code $this AdjustSetting -surfaceedges] \
1543	-font "Arial 9"
1544
1545	checkbutton $inner.outline \
1546	-text "Outline" \
1547	-variable [itcl::scope _settings(-outline)] \
1548	-command [itcl::code $this AdjustSetting -outline] \
1549	-font "Arial 9"
1550
1551	checkbutton $inner.legend \
1552	-text "Legend" \
1553	-variable [itcl::scope _settings(-legendvisible)] \
1554	-command [itcl::code $this AdjustSetting -legendvisible] \
1555	-font "Arial 9"
1556
1557	label $inner.linecolor_l -text "Isolines" -font "Arial 9"
1558	itk_component add isolineColor {
1559	Rappture::Combobox $inner.linecolor -width 10 -editable 0
1560	}
1561	$inner.linecolor choices insert end \
1562	"black" "black" \
1563	"blue" "blue" \
1564	"cyan" "cyan" \
1565	"green" "green" \
1566	"grey" "grey" \
1567	"magenta" "magenta" \
1568	"orange" "orange" \
1569	"red" "red" \
1570	"white" "white" \
1571	"none" "none"
1572
1573	$itk_component(isolineColor) value "white"
1574	bind $inner.linecolor <<Value>> \
1575	[itcl::code $this AdjustSetting -isolinecolor]
1576
1577	label $inner.background_l -text "Background" -font "Arial 9"
1578	itk_component add background {
1579	Rappture::Combobox $inner.background -width 10 -editable 0
1580	}
1581	$inner.background choices insert end \
1582	"black" "black" \
1583	"white" "white" \
1584	"grey" "grey"
1585
1586	$itk_component(background) value $_settings(-background)
1587	bind $inner.background <<Value>> \
1588	[itcl::code $this AdjustSetting -background]
1589
1590	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1591	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1592	-variable [itcl::scope _settings(-surfaceopacity)] \
1593	-width 10 \
1594	-showvalue off \
1595	-command [itcl::code $this AdjustSetting -surfaceopacity]
1596
1597	itk_component add field_l {
1598	label $inner.field_l -text "Field" -font "Arial 9"
1599	} {
1600	ignore -font
1601	}
1602	itk_component add field {
1603	Rappture::Combobox $inner.field -width 10 -editable 0
1604	}
1605	bind $inner.field <<Value>> \
1606	[itcl::code $this AdjustSetting -field]
1607
1608	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1609	itk_component add colormap {
1610	Rappture::Combobox $inner.colormap -width 10 -editable 0
1611	}
1612	$inner.colormap choices insert end [GetColormapList]
1613
1614	$itk_component(colormap) value "BCGYR"
1615	bind $inner.colormap <<Value>> \
1616	[itcl::code $this AdjustSetting -colormap]
1617
1618	label $inner.numcontours_l -text "Number of Isolines" -font "Arial 9"
1619	itk_component add numcontours {
1620	Rappture::Spinint $inner.numcontours \
1621	-min 0 -max 50 -font "arial 9"
1622	}
1623	$itk_component(numcontours) value $_settings(-numcontours)
1624	bind $itk_component(numcontours) <<Value>> \
1625	[itcl::code $this AdjustSetting -numcontours]
1626
1627	blt::table $inner \
1628	0,0 $inner.field_l -anchor w -pady 2 \
1629	0,1 $inner.field -anchor w -pady 2 -fill x \
1630	1,0 $inner.colormap_l -anchor w -pady 2 \
1631	1,1 $inner.colormap -anchor w -pady 2 -fill x \
1632	2,0 $inner.linecolor_l -anchor w -pady 2 \
1633	2,1 $inner.linecolor -anchor w -pady 2 -fill x \
1634	3,0 $inner.background_l -anchor w -pady 2 \
1635	3,1 $inner.background -anchor w -pady 2 -fill x \
1636	4,0 $inner.numcontours_l -anchor w -pady 2 \
1637	4,1 $inner.numcontours -anchor w -pady 2 \
1638	5,0 $inner.colormapDiscrete -anchor w -pady 2 -cspan 2 \
1639	6,0 $inner.isolines -anchor w -pady 2 -cspan 2 \
1640	7,0 $inner.wireframe -anchor w -pady 2 -cspan 2 \
1641	8,0 $inner.lighting -anchor w -pady 2 -cspan 2 \
1642	9,0 $inner.edges -anchor w -pady 2 -cspan 2 \
1643	10,0 $inner.outline -anchor w -pady 2 -cspan 2 \
1644	11,0 $inner.legend -anchor w -pady 2 \
1645	12,0 $inner.opacity_l -anchor w -pady 2 \
1646	12,1 $inner.opacity -fill x -pady 2 -fill x \
1647
1648	blt::table configure $inner r* c* -resize none
1649	blt::table configure $inner r13 c1 -resize expand
1650	}
1651
1652	itcl::body Rappture::VtkSurfaceViewer::BuildAxisTab {} {
1653
1654	set fg [option get $itk_component(hull) font Font]
1655	#set bfg [option get $itk_component(hull) boldFont Font]
1656
1657	set inner [$itk_component(main) insert end \
1658	-title "Axis Settings" \
1659	-icon [Rappture::icon axis2]]
1660	$inner configure -borderwidth 4
1661
1662	checkbutton $inner.visible \
1663	-text "Axes" \
1664	-variable [itcl::scope _settings(-axesvisible)] \
1665	-command [itcl::code $this AdjustSetting -axesvisible] \
1666	-font "Arial 9"
1667
1668	checkbutton $inner.labels \
1669	-text "Axis Labels" \
1670	-variable [itcl::scope _settings(-axislabels)] \
1671	-command [itcl::code $this AdjustSetting -axislabels] \
1672	-font "Arial 9"
1673	label $inner.grid_l -text "Grid" -font "Arial 9"
1674	checkbutton $inner.xgrid \
1675	-text "X" \
1676	-variable [itcl::scope _settings(-xgrid)] \
1677	-command [itcl::code $this AdjustSetting -xgrid] \
1678	-font "Arial 9"
1679	checkbutton $inner.ygrid \
1680	-text "Y" \
1681	-variable [itcl::scope _settings(-ygrid)] \
1682	-command [itcl::code $this AdjustSetting -ygrid] \
1683	-font "Arial 9"
1684	checkbutton $inner.zgrid \
1685	-text "Z" \
1686	-variable [itcl::scope _settings(-zgrid)] \
1687	-command [itcl::code $this AdjustSetting -zgrid] \
1688	-font "Arial 9"
1689	checkbutton $inner.minorticks \
1690	-text "Minor Ticks" \
1691	-variable [itcl::scope _settings(-axisminorticks)] \
1692	-command [itcl::code $this AdjustSetting -axisminorticks] \
1693	-font "Arial 9"
1694
1695	label $inner.mode_l -text "Mode" -font "Arial 9"
1696
1697	itk_component add axisMode {
1698	Rappture::Combobox $inner.mode -width 10 -editable 0
1699	}
1700	$inner.mode choices insert end \
1701	"static_triad" "static" \
1702	"closest_triad" "closest" \
1703	"furthest_triad" "farthest" \
1704	"outer_edges" "outer"
1705	$itk_component(axisMode) value $_settings(-axismode)
1706	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting -axismode]
1707
1708	blt::table $inner \
1709	0,0 $inner.visible -anchor w -cspan 4 \
1710	1,0 $inner.labels -anchor w -cspan 4 \
1711	2,0 $inner.minorticks -anchor w -cspan 4 \
1712	4,0 $inner.grid_l -anchor w \
1713	4,1 $inner.xgrid -anchor w \
1714	4,2 $inner.ygrid -anchor w \
1715	4,3 $inner.zgrid -anchor w \
1716	5,0 $inner.mode_l -anchor w -padx { 2 0 } \
1717	5,1 $inner.mode -fill x -cspan 3
1718
1719	blt::table configure $inner r* c* -resize none
1720	blt::table configure $inner r7 c6 -resize expand
1721	blt::table configure $inner r3 -height 0.125i
1722	}
1723
1724	itcl::body Rappture::VtkSurfaceViewer::BuildCameraTab {} {
1725	set inner [$itk_component(main) insert end \
1726	-title "Camera Settings" \
1727	-icon [Rappture::icon camera]]
1728	$inner configure -borderwidth 4
1729
1730	label $inner.view_l -text "view" -font "Arial 9"
1731	set f [frame $inner.view]
1732	foreach side { front back left right top bottom } {
1733	button $f.$side -image [Rappture::icon view$side] \
1734	-command [itcl::code $this SetOrientation $side]
1735	Rappture::Tooltip::for $f.$side "Change the view to $side"
1736	pack $f.$side -side left
1737	}
1738
1739	blt::table $inner \
1740	0,0 $inner.view_l -anchor e -pady 2 \
1741	0,1 $inner.view -anchor w -pady 2
1742	blt::table configure $inner r0 -resize none
1743
1744	set labels { qx qy qz qw xpan ypan zoom }
1745	set row 1
1746	foreach tag $labels {
1747	label $inner.${tag}label -text $tag -font "Arial 9"
1748	entry $inner.${tag} -font "Arial 9" -bg white \
1749	-textvariable [itcl::scope _view(-$tag)]
1750	bind $inner.${tag} <Return> \
1751	[itcl::code $this camera set -${tag}]
1752	bind $inner.${tag} <KP_Enter> \
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* -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 what [lindex $args 0]
1785	set x $_view($what)
1786	set code [catch { string is double $x } result]
1787	if { $code != 0 \|\| !$result } {
1788	return
1789	}
1790	switch -- $what {
1791	"-ortho" {
1792	if {$_view($what)} {
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 [ViewToQuaternion]
1803	$_arcball quaternion $q
1804	EventuallyRotate $q
1805	}
1806	"-zoom" {
1807	SendCmd "camera zoom $_view($what)"
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
1897	# This is too complicated. We want to set the colormap, number of
1898	# isolines and opacity for the dataset. They can be the default values,
1899	# the style hints loaded with the dataset, or set by user controls. As
1900	# datasets get loaded, they first use the defaults that are overidden
1901	# by the style hints. If the user changes the global controls, then that
1902	# overrides everything else. I don't know what it means when global
1903	# controls are specified as style hints by each dataset. It complicates
1904	# the code to handle aberrant cases.
1905
1906	if { $_changed(-surfaceedges) } {
1907	set style(-edges) $_settings(-surfaceedges)
1908	}
1909	if { $_changed(-surfacelighting) } {
1910	set style(-lighting) $_settings(-surfacelighting)
1911	}
1912	if { $_changed(-surfaceopacity) } {
1913	set style(-opacity) [expr $_settings(-surfaceopacity) * 0.01]
1914	}
1915	if { $_changed(-surfacewireframe) } {
1916	set style(-wireframe) $_settings(-surfacewireframe)
1917	}
1918	if { $_changed(-numcontours) } {
1919	set style(-levels) $_settings(-numcontours)
1920	}
1921	if { $_changed(-colormap) } {
1922	set style(-color) $_settings(-colormap)
1923	}
1924	if { $_currentColormap == "" } {
1925	SetCurrentColormap $style(-color)
1926	$itk_component(colormap) value $style(-color)
1927	}
1928	if { $_currentNumContours != $style(-levels) } {
1929	set _currentNumContours $style(-levels)
1930	set _settings(-numcontours) $_currentNumContours
1931	$itk_component(numcontours) value $_currentNumContours
1932	UpdateContourList
1933	DrawLegend
1934	}
1935	foreach setting {-outline -isolinesvisible -surfacevisible -isolinecolor} {
1936	if {$_changed($setting)} {
1937	# User-modified UI setting overrides style
1938	set style($setting) $_settings($setting)
1939	} else {
1940	# Set UI control to style setting (tool provided or default)
1941	set _settings($setting) $style($setting)
1942	}
1943	}
1944
1945	SendCmd "outline add $tag"
1946	SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
1947	SendCmd "outline visible $style(-outline) $tag"
1948
1949	SendCmd "polydata add $tag"
1950	if { $_curFldName != "" } {
1951	SendCmd "polydata colormode $_colorMode $_curFldName $tag"
1952	}
1953	SendCmd "polydata edges $style(-edges) $tag"
1954	set _settings(-surfaceedges) $style(-edges)
1955	#SendCmd "polydata color [Color2RGB $settings(-color)] $tag"
1956	SendCmd "polydata lighting $style(-lighting) $tag"
1957	set _settings(-surfacelighting) $style(-lighting)
1958	SendCmd "polydata linecolor [Color2RGB $style(-edgecolor)] $tag"
1959	SendCmd "polydata linewidth $style(-linewidth) $tag"
1960	SendCmd "polydata opacity $style(-opacity) $tag"
1961	set _settings(-surfaceopacity) [expr $style(-opacity) * 100.0]
1962	SetCurrentColormap $style(-color)
1963	SendCmd "polydata wireframe $style(-wireframe) $tag"
1964	set _settings(-surfacewireframe) $style(-wireframe)
1965
1966	SendCmd [list contour2d add contourlist $_contourList $tag]
1967	SendCmd "contour2d colormode constant {} $tag"
1968	SendCmd "contour2d color [Color2RGB $style(-isolinecolor)] $tag"
1969	}
1970
1971	itcl::body Rappture::VtkSurfaceViewer::IsValidObject { dataobj } {
1972	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
1973	return 0
1974	}
1975	return 1
1976	}
1977
1978	#
1979	# EnterLegend --
1980	#
1981	itcl::body Rappture::VtkSurfaceViewer::EnterLegend { x y } {
1982	SetLegendTip $x $y
1983	}
1984
1985	#
1986	# MotionLegend --
1987	#
1988	itcl::body Rappture::VtkSurfaceViewer::MotionLegend { x y } {
1989	Rappture::Tooltip::tooltip cancel
1990	set c $itk_component(view)
1991	set cw [winfo width $c]
1992	set ch [winfo height $c]
1993	if { $x >= 0 && $x < $cw && $y >= 0 && $y < $ch } {
1994	SetLegendTip $x $y
1995	}
1996	}
1997
1998	#
1999	# LeaveLegend --
2000	#
2001	itcl::body Rappture::VtkSurfaceViewer::LeaveLegend { } {
2002	Rappture::Tooltip::tooltip cancel
2003	.rappturetooltip configure -icon ""
2004	}
2005
2006	#
2007	# SetLegendTip --
2008	#
2009	itcl::body Rappture::VtkSurfaceViewer::SetLegendTip { x y } {
2010	set fname $_curFldName
2011	set c $itk_component(view)
2012	set w [winfo width $c]
2013	set h [winfo height $c]
2014
2015	set font "Arial 8"
2016	set lineht [font metrics $font -linespace]
2017
2018	set ih [image height $_image(legend)]
2019	set iy [expr $y - ($lineht + 2)]
2020
2021	if { [string match "component*" $fname] } {
2022	set title ""
2023	} else {
2024	if { [info exists _fields($fname)] } {
2025	foreach { title units } $_fields($fname) break
2026	if { $units != "" } {
2027	set title [format "%s (%s)" $title $units]
2028	}
2029	} else {
2030	set title $fname
2031	}
2032	}
2033	# If there's a legend title, increase the offset by the line height.
2034	if { $title != "" } {
2035	incr iy -$lineht
2036	}
2037	# Make a swatch of the selected color
2038	if { [catch { $_image(legend) get 10 $iy } pixel] != 0 } {
2039	return
2040	}
2041	if { ![info exists _image(swatch)] } {
2042	set _image(swatch) [image create photo -width 24 -height 24]
2043	}
2044	set color [eval format "\#%02x%02x%02x" $pixel]
2045	$_image(swatch) put black -to 0 0 23 23
2046	$_image(swatch) put $color -to 1 1 22 22
2047	.rappturetooltip configure -icon $_image(swatch)
2048
2049	# Compute the value of the point
2050	if { [info exists _limits($_curFldName)] } {
2051	foreach { vmin vmax } $_limits($_curFldName) break
2052	set t [expr 1.0 - (double($iy) / double($ih-1))]
2053	set value [expr $t * ($vmax - $vmin) + $vmin]
2054	} else {
2055	set value 0.0
2056	}
2057	set tx [expr $x + 15]
2058	set ty [expr $y - 5]
2059	if { [info exists _isolines($y)] } {
2060	Rappture::Tooltip::text $c [format "$title %g (isoline)" $_isolines($y)]
2061	} else {
2062	Rappture::Tooltip::text $c [format "$title %g" $value]
2063	}
2064	Rappture::Tooltip::tooltip show $c +$tx,+$ty
2065	}
2066
2067	#
2068	# ReceiveLegend --
2069	#
2070	# Invoked automatically whenever the "legend" command comes in from
2071	# the rendering server. Indicates that binary image data with the
2072	# specified <size> will follow.
2073	#
2074	itcl::body Rappture::VtkSurfaceViewer::ReceiveLegend { colormap title min max size } {
2075	DebugTrace "Enter"
2076	set _title $title
2077	regsub {\(mag\)} $title "" _title
2078	if { [IsConnected] } {
2079	set bytes [ReceiveBytes $size]
2080	if { ![info exists _image(legend)] } {
2081	set _image(legend) [image create photo]
2082	}
2083	$_image(legend) configure -data $bytes
2084	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2085	if { [catch {DrawLegend} errs] != 0 } {
2086	global errorInfo
2087	puts stderr "errs=$errs errorInfo=$errorInfo"
2088	}
2089	}
2090	}
2091
2092	#
2093	# DrawLegend --
2094	#
2095	# Draws the legend on the canvas on the right side of the plot area.
2096	#
2097	itcl::body Rappture::VtkSurfaceViewer::DrawLegend {} {
2098	set fname $_curFldName
2099	set c $itk_component(view)
2100	set w [winfo width $c]
2101	set h [winfo height $c]
2102	set font "Arial 8"
2103	set lineht [font metrics $font -linespace]
2104
2105	if { [string match "component*" $fname] } {
2106	set title ""
2107	} else {
2108	if { [info exists _fields($fname)] } {
2109	foreach { title units } $_fields($fname) break
2110	if { $units != "" } {
2111	set title [format "%s (%s)" $title $units]
2112	}
2113	} else {
2114	set title $fname
2115	}
2116	}
2117	set x [expr $w - 2]
2118	if { !$_settings(-legendvisible) } {
2119	$c delete legend
2120	return
2121	}
2122	if { [$c find withtag "legend"] == "" } {
2123	set y 2
2124	# If there's a legend title, create a text item for the title.
2125	$c create text $x $y \
2126	-anchor ne \
2127	-fill $itk_option(-plotforeground) -tags "title legend" \
2128	-font $font
2129	if { $title != "" } {
2130	incr y $lineht
2131	}
2132	$c create text $x $y \
2133	-anchor ne \
2134	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2135	-font $font
2136	incr y $lineht
2137	$c create image $x $y \
2138	-anchor ne \
2139	-image $_image(legend) -tags "colormap legend"
2140	$c create rectangle $x $y 1 1 \
2141	-fill "" -outline "" -tags "sensor legend"
2142	$c create text $x [expr {$h-2}] \
2143	-anchor se \
2144	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2145	-font $font
2146	$c bind sensor <Enter> [itcl::code $this EnterLegend %x %y]
2147	$c bind sensor <Leave> [itcl::code $this LeaveLegend]
2148	$c bind sensor <Motion> [itcl::code $this MotionLegend %x %y]
2149	}
2150	$c delete isoline
2151	set x2 $x
2152	set iw [image width $_image(legend)]
2153	set ih [image height $_image(legend)]
2154	set x1 [expr $x2 - ($iw*12)/10]
2155	set color $_settings(-isolinecolor)
2156	# Draw the isolines on the legend.
2157	array unset _isolines
2158	if { $color != "none" && [info exists _limits($_curFldName)] &&
2159	$_settings(-isolinesvisible) && $_settings(-numcontours) > 0 } {
2160
2161	foreach { vmin vmax } $_limits($_curFldName) break
2162	set range [expr double($vmax - $vmin)]
2163	if { $range <= 0.0 } {
2164	set range 1.0; # Min is greater or equal to max.
2165	}
2166	set tags "isoline legend"
2167	set offset [expr 2 + $lineht]
2168	if { $title != "" } {
2169	incr offset $lineht
2170	}
2171	foreach value $_contourList {
2172	set norm [expr 1.0 - (($value - $vmin) / $range)]
2173	set y1 [expr int(round(($norm * $ih) + $offset))]
2174	for { set off 0 } { $off < 3 } { incr off } {
2175	set _isolines([expr $y1 + $off]) $value
2176	set _isolines([expr $y1 - $off]) $value
2177	}
2178	$c create line $x1 $y1 $x2 $y1 -fill $color -tags $tags
2179	}
2180	}
2181
2182	$c bind title <ButtonPress> [itcl::code $this Combo post]
2183	$c bind title <Enter> [itcl::code $this Combo activate]
2184	$c bind title <Leave> [itcl::code $this Combo deactivate]
2185	# Reset the item coordinates according the current size of the plot.
2186	$c itemconfigure title -text $title
2187	if { [info exists _limits($_curFldName)] } {
2188	foreach { vmin vmax } $_limits($_curFldName) break
2189	$c itemconfigure vmin -text [format %g $vmin]
2190	$c itemconfigure vmax -text [format %g $vmax]
2191	}
2192	set y 2
2193	# If there's a legend title, move the title to the correct position
2194	if { $title != "" } {
2195	$c itemconfigure title -text $title
2196	$c coords title $x $y
2197	incr y $lineht
2198	$c raise title
2199	}
2200	$c coords vmax $x $y
2201	incr y $lineht
2202	$c coords colormap $x $y
2203	$c coords sensor [expr $x - $iw] $y $x [expr $y + $ih]
2204	$c raise sensor
2205	$c coords vmin $x [expr {$h - 2}]
2206	}
2207
2208	# ----------------------------------------------------------------------
2209	# USAGE: _dropdown post
2210	# USAGE: _dropdown unpost
2211	# USAGE: _dropdown select
2212	#
2213	# Used internally to handle the dropdown list for this combobox. The
2214	# post/unpost options are invoked when the list is posted or unposted
2215	# to manage the relief of the controlling button. The select option
2216	# is invoked whenever there is a selection from the list, to assign
2217	# the value back to the gauge.
2218	# ----------------------------------------------------------------------
2219	itcl::body Rappture::VtkSurfaceViewer::Combo {option} {
2220	set c $itk_component(view)
2221	switch -- $option {
2222	post {
2223	foreach { x1 y1 x2 y2 } [$c bbox title] break
2224	set cw [winfo width $itk_component(view)]
2225	set mw [winfo reqwidth $itk_component(fieldmenu)]
2226	set x1 [expr $cw - $mw]
2227	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2228	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2229	tk_popup $itk_component(fieldmenu) $x $y
2230	}
2231	activate {
2232	$c itemconfigure title -fill red
2233	}
2234	deactivate {
2235	$c itemconfigure title -fill $itk_option(-plotforeground)
2236	}
2237	invoke {
2238	$itk_component(field) value $_curFldLabel
2239	AdjustSetting -field
2240	}
2241	default {
2242	error "bad option \"$option\": should be post, unpost, select"
2243	}
2244	}
2245	}
2246
2247	#
2248	# SetCurrentColormap --
2249	#
2250	itcl::body Rappture::VtkSurfaceViewer::SetCurrentColormap { name } {
2251	# Keep track of the colormaps that we build.
2252	if { ![info exists _colormaps($name)] } {
2253	BuildColormap $name
2254	set _colormaps($name) 1
2255	}
2256	set _currentColormap $name
2257	SendCmd "contour2d colormap $_currentColormap"
2258	SendCmd "polydata colormap $_currentColormap"
2259	}
2260
2261	#
2262	# BuildColormap --
2263	#
2264	# Build the designated colormap on the server.
2265	#
2266	itcl::body Rappture::VtkSurfaceViewer::BuildColormap { name } {
2267	set cmap [ColorsToColormap $name]
2268	if { [llength $cmap] == 0 } {
2269	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
2270	}
2271	set amap "0.0 1.0 1.0 1.0"
2272	SendCmd "colormap add $name { $cmap } { $amap }"
2273	}
2274
2275	itcl::body Rappture::VtkSurfaceViewer::SetOrientation { side } {
2276	array set positions {
2277	front "1 0 0 0"
2278	back "0 0 1 0"
2279	left "0.707107 0 -0.707107 0"
2280	right "0.707107 0 0.707107 0"
2281	top "0.707107 -0.707107 0 0"
2282	bottom "0.707107 0.707107 0 0"
2283	}
2284	foreach name { -qw -qx -qy -qz } value $positions($side) {
2285	set _view($name) $value
2286	}
2287	set q [ViewToQuaternion]
2288	$_arcball quaternion $q
2289	SendCmd "camera orient $q"
2290	SendCmd "camera reset"
2291	set _view(-xpan) 0
2292	set _view(-ypan) 0
2293	set _view(-zoom) 1.0
2294	}
2295
2296	itcl::body Rappture::VtkSurfaceViewer::UpdateContourList {} {
2297	if { ![info exists _limits($_curFldName)] } {
2298	return
2299	}
2300	if { $_currentNumContours < 1 } {
2301	set _contourList ""
2302	return
2303	}
2304	foreach { vmin vmax } $_limits($_curFldName) break
2305	set v [blt::vector create \#auto]
2306	$v seq $vmin $vmax [expr $_currentNumContours+2]
2307	$v delete end 0
2308	set _contourList [$v range 0 end]
2309	blt::vector destroy $v
2310	}
2311
2312	itcl::body Rappture::VtkSurfaceViewer::SetCurrentFieldName { dataobj } {
2313	set _first $dataobj
2314	$itk_component(field) choices delete 0 end
2315	$itk_component(fieldmenu) delete 0 end
2316	array unset _fields
2317	set _curFldName ""
2318	foreach cname [$_first components] {
2319	foreach fname [$_first fieldnames $cname] {
2320	if { [info exists _fields($fname)] } {
2321	continue
2322	}
2323	foreach { label units components } \
2324	[$_first fieldinfo $fname] break
2325	$itk_component(field) choices insert end "$fname" "$label"
2326	$itk_component(fieldmenu) add radiobutton -label "$label" \
2327	-value $label -variable [itcl::scope _curFldLabel] \
2328	-selectcolor red \
2329	-activebackground $itk_option(-plotbackground) \
2330	-activeforeground $itk_option(-plotforeground) \
2331	-font "Arial 8" \
2332	-command [itcl::code $this Combo invoke]
2333	set _fields($fname) [list $label $units $components]
2334	if { $_curFldName == "" } {
2335	set _curFldName $fname
2336	set _curFldLabel $label
2337	}
2338	}
2339	}
2340	$itk_component(field) value $_curFldLabel
2341	}

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