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source: branches/uiuc_vtk_viewers/gui/scripts/vtksurfaceviewer.tcl @ 5033

Last change on this file since 5033 was 4767, checked in by ldelgass, 10 years ago
More syncing of code between clients
File size: 77.0 KB

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1	# -- mode: tcl; indent-tabs-mode: nil --
2	# ----------------------------------------------------------------------
3	# COMPONENT: vtksurfaceviewer - Vtk 3D boundary surface viewer
4	#
5	# It connects to the Vtk server running on a rendering farm,
6	# transmits data, and displays the results.
7	# ======================================================================
8	# AUTHOR: Michael McLennan, Purdue University
9	# Copyright (c) 2004-2014 HUBzero Foundation, LLC
10	#
11	# See the file "license.terms" for information on usage and
12	# redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
13	# ======================================================================
14	package require Itk
15	package require BLT
16	#package require Img
17
18	option add *VtkSurfaceViewer.width 4i widgetDefault
19	option add VtkSurfaceViewercursor crosshair widgetDefault
20	option add *VtkSurfaceViewer.height 4i widgetDefault
21	option add *VtkSurfaceViewer.foreground black widgetDefault
22	option add *VtkSurfaceViewer.controlBackground gray widgetDefault
23	option add *VtkSurfaceViewer.controlDarkBackground #999999 widgetDefault
24	option add *VtkSurfaceViewer.plotBackground black widgetDefault
25	option add *VtkSurfaceViewer.plotForeground white widgetDefault
26	option add *VtkSurfaceViewer.font \
27	--helvetica-medium-r-normal--12-* widgetDefault
28
29	# must use this name -- plugs into Rappture::resources::load
30	proc VtkSurfaceViewer_init_resources {} {
31	Rappture::resources::register \
32	vtkvis_server Rappture::VtkSurfaceViewer::SetServerList
33	}
34
35	itcl::class Rappture::VtkSurfaceViewer {
36	inherit Rappture::VisViewer
37
38	itk_option define -plotforeground plotForeground Foreground ""
39	itk_option define -plotbackground plotBackground Background ""
40
41	constructor { hostlist args } {
42	Rappture::VisViewer::constructor $hostlist
43	} {
44	# defined below
45	}
46	destructor {
47	# defined below
48	}
49	public proc SetServerList { namelist } {
50	Rappture::VisViewer::SetServerList "vtkvis" $namelist
51	}
52	public method add {dataobj {settings ""}}
53	public method camera {option args}
54	public method delete {args}
55	public method disconnect {}
56	public method download {option args}
57	public method get {args}
58	public method isconnected {}
59	public method parameters {title args} {
60	# do nothing
61	}
62	public method scale {args}
63
64	# 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 SetLegendTip { x y }
102	private method SetObjectStyle { dataobj comp }
103	private method SetOrientation { side }
104	private method UpdateContourList {}
105	private method ViewToQuaternion {} {
106	return [list $_view(-qw) $_view(-qx) $_view(-qy) $_view(-qz)]
107	}
108	private method Zoom {option}
109
110	private variable _arcball ""
111
112	private variable _dlist "" ; # list of data objects
113	private variable _obj2datasets
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 _dataset2style ;# maps dataobj-component to transfunc
125
126	private variable _click ; # info used for rotate operations
127	private variable _limits ; # autoscale min/max for all axes
128	private variable _view ; # view params for 3D view
129	private variable _settings
130	private variable _style; # Array of current component styles.
131	private variable _changed
132	private variable _initialStyle; # Array of initial component styles.
133	private variable _reset 1; # indicates if camera needs to be reset
134	# to starting position.
135
136	private variable _first "" ; # This is the topmost dataset.
137	private variable _start 0
138	private variable _title ""
139	private variable _isolines
140	private variable _contourList ""
141
142	common _downloadPopup; # download options from popup
143	private common _hardcopy
144	private variable _width 0
145	private variable _height 0
146	private variable _resizePending 0
147	private variable _rotatePending 0
148	private variable _legendPending 0
149	private variable _field ""
150	private variable _colorMode "scalar"; # Mode of colormap (vmag or scalar)
151	private variable _fieldNames {}
152	private variable _fields
153	private variable _curFldName ""
154	private variable _curFldLabel ""
155	}
156
157	itk::usual VtkSurfaceViewer {
158	keep -background -foreground -cursor -font
159	keep -plotbackground -plotforeground
160	}
161
162	# ----------------------------------------------------------------------
163	# CONSTRUCTOR
164	# ----------------------------------------------------------------------
165	itcl::body Rappture::VtkSurfaceViewer::constructor {hostlist args} {
166	package require vtk
167	set _serverType "vtkvis"
168
169	# Rebuild event
170	$_dispatcher register !rebuild
171	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
172
173	# Resize event
174	$_dispatcher register !resize
175	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
176
177	# Rotate event
178	$_dispatcher register !rotate
179	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
180
181	# Legend event
182	$_dispatcher register !legend
183	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
184
185	#
186	# Populate parser with commands handle incoming requests
187	#
188	$_parser alias image [itcl::code $this ReceiveImage]
189	$_parser alias dataset [itcl::code $this ReceiveDataset]
190	$_parser alias legend [itcl::code $this ReceiveLegend]
191
192	# Initialize the view to some default parameters.
193	array set _view {
194	-ortho 0
195	-qw 0.853553
196	-qx -0.353553
197	-qy 0.353553
198	-qz 0.146447
199	-xpan 0
200	-ypan 0
201	-zoom 1.0
202	}
203	set _arcball [blt::arcball create 100 100]
204	$_arcball quaternion [ViewToQuaternion]
205
206	array set _settings {
207	-axesvisible 1
208	-axislabels 1
209	-axisminorticks 1
210	-axismode "static"
211	-background black
212	-colormap BCGYR
213	-colormapvisible 1
214	-field "Default"
215	-isolinecolor white
216	-isolinesvisible 0
217	-legendvisible 1
218	-numcontours 10
219	-surfaceedges 0
220	-surfacelighting 1
221	-surfaceopacity 100
222	-outline 0
223	-surfacevisible 1
224	-surfacewireframe 0
225	-xgrid 0
226	-ygrid 0
227	-zgrid 0
228	}
229	array set _changed {
230	-colormap 0
231	-numcontours 0
232	-surfaceopacity 0
233	}
234
235	itk_component add view {
236	canvas $itk_component(plotarea).view \
237	-highlightthickness 0 -borderwidth 0
238	} {
239	usual
240	ignore -highlightthickness -borderwidth -background
241	}
242
243	itk_component add fieldmenu {
244	menu $itk_component(plotarea).menu -bg black -fg white -relief flat \
245	-tearoff 0
246	} {
247	usual
248	ignore -background -foreground -relief -tearoff
249	}
250	set c $itk_component(view)
251	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
252	bind $c <4> [itcl::code $this Zoom in 0.25]
253	bind $c <5> [itcl::code $this Zoom out 0.25]
254	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
255	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
256	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
257	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
258	bind $c <Enter> "focus %W"
259	bind $c <Control-F1> [itcl::code $this ToggleConsole]
260
261	# Fix the scrollregion in case we go off screen
262	$c configure -scrollregion [$c bbox all]
263
264	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
265	set _map(cwidth) -1
266	set _map(cheight) -1
267	set _map(zoom) 1.0
268	set _map(original) ""
269
270	set f [$itk_component(main) component controls]
271	itk_component add reset {
272	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
273	-highlightthickness 0 \
274	-image [Rappture::icon reset-view] \
275	-command [itcl::code $this Zoom reset]
276	} {
277	usual
278	ignore -highlightthickness
279	}
280	pack $itk_component(reset) -side top -padx 2 -pady 2
281	Rappture::Tooltip::for $itk_component(reset) \
282	"Reset the view to the default zoom level"
283
284	itk_component add zoomin {
285	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
286	-highlightthickness 0 \
287	-image [Rappture::icon zoom-in] \
288	-command [itcl::code $this Zoom in]
289	} {
290	usual
291	ignore -highlightthickness
292	}
293	pack $itk_component(zoomin) -side top -padx 2 -pady 2
294	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
295
296	itk_component add zoomout {
297	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
298	-highlightthickness 0 \
299	-image [Rappture::icon zoom-out] \
300	-command [itcl::code $this Zoom out]
301	} {
302	usual
303	ignore -highlightthickness
304	}
305	pack $itk_component(zoomout) -side top -padx 2 -pady 2
306	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
307
308	itk_component add surface {
309	Rappture::PushButton $f.surface \
310	-onimage [Rappture::icon volume-on] \
311	-offimage [Rappture::icon volume-off] \
312	-variable [itcl::scope _settings(-surfacevisible)] \
313	-command [itcl::code $this AdjustSetting -surfacevisible]
314	}
315	$itk_component(surface) select
316	Rappture::Tooltip::for $itk_component(surface) \
317	"Hide the surface"
318	pack $itk_component(surface) -padx 2 -pady 2
319
320	if { [catch {
321	BuildSurfaceTab
322	BuildAxisTab
323	BuildCameraTab
324	} errs] != 0 } {
325	puts stderr errs=$errs
326	}
327
328	# Legend
329	set _image(legend) [image create photo]
330	itk_component add legend {
331	canvas $itk_component(plotarea).legend -width 50 -highlightthickness 0
332	} {
333	usual
334	ignore -highlightthickness
335	rename -background -plotbackground plotBackground Background
336	}
337
338	# Hack around the Tk panewindow. The problem is that the requested
339	# size of the 3d view isn't set until an image is retrieved from
340	# the server. So the panewindow uses the tiny size.
341	set w 10000
342	pack forget $itk_component(view)
343	blt::table $itk_component(plotarea) \
344	0,0 $itk_component(view) -fill both -reqwidth $w
345	blt::table configure $itk_component(plotarea) c1 -resize none
346
347	# Bindings for rotation via mouse
348	bind $itk_component(view) <ButtonPress-1> \
349	[itcl::code $this Rotate click %x %y]
350	bind $itk_component(view) <B1-Motion> \
351	[itcl::code $this Rotate drag %x %y]
352	bind $itk_component(view) <ButtonRelease-1> \
353	[itcl::code $this Rotate release %x %y]
354
355	# Bindings for panning via mouse
356	bind $itk_component(view) <ButtonPress-2> \
357	[itcl::code $this Pan click %x %y]
358	bind $itk_component(view) <B2-Motion> \
359	[itcl::code $this Pan drag %x %y]
360	bind $itk_component(view) <ButtonRelease-2> \
361	[itcl::code $this Pan release %x %y]
362
363	#bind $itk_component(view) <ButtonRelease-3> \
364	# [itcl::code $this Pick %x %y]
365
366	# Bindings for panning via keyboard
367	bind $itk_component(view) <KeyPress-Left> \
368	[itcl::code $this Pan set -10 0]
369	bind $itk_component(view) <KeyPress-Right> \
370	[itcl::code $this Pan set 10 0]
371	bind $itk_component(view) <KeyPress-Up> \
372	[itcl::code $this Pan set 0 -10]
373	bind $itk_component(view) <KeyPress-Down> \
374	[itcl::code $this Pan set 0 10]
375	bind $itk_component(view) <Shift-KeyPress-Left> \
376	[itcl::code $this Pan set -2 0]
377	bind $itk_component(view) <Shift-KeyPress-Right> \
378	[itcl::code $this Pan set 2 0]
379	bind $itk_component(view) <Shift-KeyPress-Up> \
380	[itcl::code $this Pan set 0 -2]
381	bind $itk_component(view) <Shift-KeyPress-Down> \
382	[itcl::code $this Pan set 0 2]
383
384	# Bindings for zoom via keyboard
385	bind $itk_component(view) <KeyPress-Prior> \
386	[itcl::code $this Zoom out]
387	bind $itk_component(view) <KeyPress-Next> \
388	[itcl::code $this Zoom in]
389
390	bind $itk_component(view) <Enter> "focus $itk_component(view)"
391
392	if {[string equal "x11" [tk windowingsystem]]} {
393	# Bindings for zoom via mouse
394	bind $itk_component(view) <4> [itcl::code $this Zoom out]
395	bind $itk_component(view) <5> [itcl::code $this Zoom in]
396	}
397
398	set _image(download) [image create photo]
399
400	eval itk_initialize $args
401
402	EnableWaitDialog 500
403	Connect
404	}
405
406	# ----------------------------------------------------------------------
407	# DESTRUCTOR
408	# ----------------------------------------------------------------------
409	itcl::body Rappture::VtkSurfaceViewer::destructor {} {
410	Disconnect
411	image delete $_image(plot)
412	image delete $_image(download)
413	catch { blt::arcball destroy $_arcball }
414	}
415
416	itcl::body Rappture::VtkSurfaceViewer::DoResize {} {
417	if { $_width < 2 } {
418	set _width 500
419	}
420	if { $_height < 2 } {
421	set _height 500
422	}
423	set _start [clock clicks -milliseconds]
424	SendCmd "screen size $_width $_height"
425
426	EventuallyRequestLegend
427	set _resizePending 0
428	}
429
430	itcl::body Rappture::VtkSurfaceViewer::DoRotate {} {
431	SendCmd "camera orient [ViewToQuaternion]"
432	set _rotatePending 0
433	}
434
435	itcl::body Rappture::VtkSurfaceViewer::EventuallyRequestLegend {} {
436	if { !$_legendPending } {
437	set _legendPending 1
438	$_dispatcher event -idle !legend
439	}
440	}
441
442	itcl::body Rappture::VtkSurfaceViewer::EventuallyResize { w h } {
443	set _width $w
444	set _height $h
445	$_arcball resize $w $h
446	if { !$_resizePending } {
447	set _resizePending 1
448	$_dispatcher event -after 400 !resize
449	}
450	}
451
452	set rotate_delay 100
453
454	itcl::body Rappture::VtkSurfaceViewer::EventuallyRotate { q } {
455	QuaternionToView $q
456	if { !$_rotatePending } {
457	set _rotatePending 1
458	global rotate_delay
459	$_dispatcher event -after $rotate_delay !rotate
460	}
461	}
462
463	# ----------------------------------------------------------------------
464	# USAGE: add <dataobj> ?<settings>?
465	#
466	# Clients use this to add a data object to the plot. The optional
467	# <settings> are used to configure the plot. Allowed settings are
468	# -color, -brightness, -width, -linestyle, and -raise.
469	# ----------------------------------------------------------------------
470	itcl::body Rappture::VtkSurfaceViewer::add {dataobj {settings ""}} {
471	if { ![$dataobj isvalid] } {
472	return; # Object doesn't contain valid data.
473	}
474	array set params {
475	-color auto
476	-width 1
477	-linestyle solid
478	-brightness 0
479	-raise 0
480	-description ""
481	-param ""
482	-type ""
483	}
484	array set params $settings
485	set params(-description) ""
486	set params(-param) ""
487	array set params $settings
488
489	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
490	# can't handle -autocolors yet
491	set params(-color) black
492	}
493	set pos [lsearch -exact $_dlist $dataobj]
494	if {$pos < 0} {
495	lappend _dlist $dataobj
496	}
497	set _obj2ovride($dataobj-color) $params(-color)
498	set _obj2ovride($dataobj-width) $params(-width)
499	set _obj2ovride($dataobj-raise) $params(-raise)
500	$_dispatcher event -idle !rebuild
501	}
502
503	# ----------------------------------------------------------------------
504	# USAGE: delete ?<dataobj1> <dataobj2> ...?
505	#
506	# Clients use this to delete a dataobj from the plot. If no dataobjs
507	# are specified, then all dataobjs are deleted. No data objects are
508	# deleted. They are only removed from the display list.
509	#
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 result [VisViewer::Connect $_hosts]
722	if { $result } {
723	if { $_reportClientInfo } {
724	# Tell the server the viewer, hub, user and session.
725	# Do this immediately on connect before buffering any commands
726	global env
727
728	set info {}
729	set user "???"
730	if { [info exists env(USER)] } {
731	set user $env(USER)
732	}
733	set session "???"
734	if { [info exists env(SESSION)] } {
735	set session $env(SESSION)
736	}
737	lappend info "version" "$Rappture::version"
738	lappend info "build" "$Rappture::build"
739	lappend info "svnurl" "$Rappture::svnurl"
740	lappend info "installdir" "$Rappture::installdir"
741	lappend info "hub" [exec hostname]
742	lappend info "client" "vtksurfaceviewer"
743	lappend info "user" $user
744	lappend info "session" $session
745	SendCmd "clientinfo [list $info]"
746	}
747
748	set w [winfo width $itk_component(view)]
749	set h [winfo height $itk_component(view)]
750	EventuallyResize $w $h
751	}
752	return $result
753	}
754
755	#
756	# isconnected --
757	#
758	# Indicates if we are currently connected to the visualization server.
759	#
760	itcl::body Rappture::VtkSurfaceViewer::isconnected {} {
761	return [VisViewer::IsConnected]
762	}
763
764	#
765	# disconnect --
766	#
767	itcl::body Rappture::VtkSurfaceViewer::disconnect {} {
768	Disconnect
769	set _reset 1
770	}
771
772	#
773	# Disconnect --
774	#
775	# Clients use this method to disconnect from the current rendering
776	# 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	set _outbuf ""
787	array unset _datasets
788	array unset _data
789	array unset _colormaps
790	array unset _dataset2style
791	array unset _obj2datasets
792	}
793
794	# ----------------------------------------------------------------------
795	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
796	#
797	# Invoked automatically whenever the "image" command comes in from
798	# the rendering server. Indicates that binary image data with the
799	# specified <size> will follow.
800	# ----------------------------------------------------------------------
801	itcl::body Rappture::VtkSurfaceViewer::ReceiveImage { args } {
802	array set info {
803	-token "???"
804	-bytes 0
805	-type image
806	}
807	array set info $args
808	set bytes [ReceiveBytes $info(-bytes)]
809	if { $info(-type) == "image" } {
810	if 0 {
811	set f [open "last.ppm" "w"]
812	fconfigure $f -encoding binary
813	puts -nonewline $f $bytes
814	close $f
815	}
816	$_image(plot) configure -data $bytes
817	#set time [clock seconds]
818	#set date [clock format $time]
819	#set w [image width $_image(plot)]
820	#set h [image height $_image(plot)]
821	#puts stderr "$date: received image ${w}x${h} image"
822	if { $_start > 0 } {
823	set finish [clock clicks -milliseconds]
824	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
825	set _start 0
826	}
827	} elseif { $info(type) == "print" } {
828	set tag $this-print-$info(-token)
829	set _hardcopy($tag) $bytes
830	}
831	}
832
833	#
834	# ReceiveDataset --
835	#
836	itcl::body Rappture::VtkSurfaceViewer::ReceiveDataset { args } {
837	if { ![isconnected] } {
838	return
839	}
840	set option [lindex $args 0]
841	switch -- $option {
842	"scalar" {
843	set option [lindex $args 1]
844	switch -- $option {
845	"world" {
846	foreach { x y z value tag } [lrange $args 2 end] break
847	}
848	"pixel" {
849	foreach { x y value tag } [lrange $args 2 end] break
850	}
851	}
852	}
853	"vector" {
854	set option [lindex $args 1]
855	switch -- $option {
856	"world" {
857	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
858	}
859	"pixel" {
860	foreach { x y vx vy vz tag } [lrange $args 2 end] break
861	}
862	}
863	}
864	"names" {
865	foreach { name } [lindex $args 1] {
866	#puts stderr "Dataset: $name"
867	}
868	}
869	default {
870	error "unknown dataset option \"$option\" from server"
871	}
872	}
873	}
874
875	# ----------------------------------------------------------------------
876	# USAGE: Rebuild
877	#
878	# Called automatically whenever something changes that affects the
879	# data in the widget. Clears any existing data and rebuilds the
880	# widget to display new data.
881	# ----------------------------------------------------------------------
882	itcl::body Rappture::VtkSurfaceViewer::Rebuild {} {
883	set w [winfo width $itk_component(view)]
884	set h [winfo height $itk_component(view)]
885	if { $w < 2 \|\| $h < 2 } {
886	$_dispatcher event -idle !rebuild
887	return
888	}
889
890	# Turn on buffering of commands to the server. We don't want to
891	# be preempted by a server disconnect/reconnect (which automatically
892	# generates a new call to Rebuild).
893	StartBufferingCommands
894
895	if { $_reset } {
896	set _width $w
897	set _height $h
898	$_arcball resize $w $h
899	DoResize
900	# Reset the camera and other view parameters
901	$_arcball quaternion [ViewToQuaternion]
902	if {$_view(-ortho)} {
903	SendCmd "camera mode ortho"
904	} else {
905	SendCmd "camera mode persp"
906	}
907	DoRotate
908	PanCamera
909	set _first ""
910	InitSettings -xgrid -ygrid -zgrid -axismode \
911	-axesvisible -axislabels -axisminorticks
912	#SendCmd "axis lformat all %g"
913	StopBufferingCommands
914	SendCmd "imgflush"
915	StartBufferingCommands
916	}
917	set _first ""
918	SendCmd "dataset visible 0"
919	foreach dataobj [get -objects] {
920	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
921	set _first $dataobj
922	}
923	set _obj2datasets($dataobj) ""
924	foreach comp [$dataobj components] {
925	set tag $dataobj-$comp
926	if { ![info exists _datasets($tag)] } {
927	set bytes [$dataobj vtkdata $comp]
928	if 0 {
929	set f [open "/tmp/surface.vtk" "w"]
930	fconfigure $f -translation binary -encoding binary
931	puts -nonewline $f $bytes
932	close $f
933	}
934	set length [string length $bytes]
935	if { $_reportClientInfo } {
936	set info {}
937	lappend info "tool_id" [$dataobj hints toolid]
938	lappend info "tool_name" [$dataobj hints toolname]
939	lappend info "tool_title" [$dataobj hints tooltitle]
940	lappend info "tool_command" [$dataobj hints toolcommand]
941	lappend info "tool_revision" [$dataobj hints toolrevision]
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	SendCmd "dataset add $tag data follows $length"
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	-xpan 0
1095	-ypan 0
1096	-zoom 1.0
1097	}
1098	if { $_first != "" } {
1099	set location [$_first hints camera]
1100	if { $location != "" } {
1101	array set _view $location
1102	}
1103	}
1104	$_arcball quaternion [ViewToQuaternion]
1105	DoRotate
1106	SendCmd "camera reset"
1107	}
1108	}
1109	}
1110
1111	itcl::body Rappture::VtkSurfaceViewer::PanCamera {} {
1112	set x $_view(-xpan)
1113	set y $_view(-ypan)
1114	SendCmd "camera pan $x $y"
1115	}
1116
1117	# ----------------------------------------------------------------------
1118	# USAGE: Rotate click <x> <y>
1119	# USAGE: Rotate drag <x> <y>
1120	# USAGE: Rotate release <x> <y>
1121	#
1122	# Called automatically when the user clicks/drags/releases in the
1123	# plot area. Moves the plot according to the user's actions.
1124	# ----------------------------------------------------------------------
1125	itcl::body Rappture::VtkSurfaceViewer::Rotate {option x y} {
1126	switch -- $option {
1127	"click" {
1128	$itk_component(view) configure -cursor fleur
1129	set _click(x) $x
1130	set _click(y) $y
1131	}
1132	"drag" {
1133	if {[array size _click] == 0} {
1134	Rotate click $x $y
1135	} else {
1136	set w [winfo width $itk_component(view)]
1137	set h [winfo height $itk_component(view)]
1138	if {$w <= 0 \|\| $h <= 0} {
1139	return
1140	}
1141
1142	if {[catch {
1143	# this fails sometimes for no apparent reason
1144	set dx [expr {double($x-$_click(x))/$w}]
1145	set dy [expr {double($y-$_click(y))/$h}]
1146	}]} {
1147	return
1148	}
1149	if { $dx == 0 && $dy == 0 } {
1150	return
1151	}
1152	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1153	EventuallyRotate $q
1154	set _click(x) $x
1155	set _click(y) $y
1156	}
1157	}
1158	"release" {
1159	Rotate drag $x $y
1160	$itk_component(view) configure -cursor ""
1161	catch {unset _click}
1162	}
1163	default {
1164	error "bad option \"$option\": should be click, drag, release"
1165	}
1166	}
1167	}
1168
1169	itcl::body Rappture::VtkSurfaceViewer::Pick {x y} {
1170	foreach tag [CurrentDatasets -visible] {
1171	SendCmd "dataset getscalar pixel $x $y $tag"
1172	}
1173	}
1174
1175	# ----------------------------------------------------------------------
1176	# USAGE: $this Pan click x y
1177	# $this Pan drag x y
1178	# $this Pan release x y
1179	#
1180	# Called automatically when the user clicks on one of the zoom
1181	# controls for this widget. Changes the zoom for the current view.
1182	# ----------------------------------------------------------------------
1183	itcl::body Rappture::VtkSurfaceViewer::Pan {option x y} {
1184	switch -- $option {
1185	"set" {
1186	set w [winfo width $itk_component(view)]
1187	set h [winfo height $itk_component(view)]
1188	set x [expr $x / double($w)]
1189	set y [expr $y / double($h)]
1190	set _view(-xpan) [expr $_view(-xpan) + $x]
1191	set _view(-ypan) [expr $_view(-ypan) + $y]
1192	PanCamera
1193	return
1194	}
1195	"click" {
1196	set _click(x) $x
1197	set _click(y) $y
1198	$itk_component(view) configure -cursor hand1
1199	}
1200	"drag" {
1201	if { ![info exists _click(x)] } {
1202	set _click(x) $x
1203	}
1204	if { ![info exists _click(y)] } {
1205	set _click(y) $y
1206	}
1207	set w [winfo width $itk_component(view)]
1208	set h [winfo height $itk_component(view)]
1209	set dx [expr ($_click(x) - $x)/double($w)]
1210	set dy [expr ($_click(y) - $y)/double($h)]
1211	set _click(x) $x
1212	set _click(y) $y
1213	set _view(-xpan) [expr $_view(-xpan) - $dx]
1214	set _view(-ypan) [expr $_view(-ypan) - $dy]
1215	PanCamera
1216	}
1217	"release" {
1218	Pan drag $x $y
1219	$itk_component(view) configure -cursor ""
1220	}
1221	default {
1222	error "unknown option \"$option\": should set, click, drag, or release"
1223	}
1224	}
1225	}
1226
1227	# ----------------------------------------------------------------------
1228	# USAGE: InitSettings <what> ?<value>?
1229	#
1230	# Used internally to update rendering settings whenever parameters
1231	# change in the popup settings panel. Sends the new settings off
1232	# to the back end.
1233	# ----------------------------------------------------------------------
1234	itcl::body Rappture::VtkSurfaceViewer::InitSettings { args } {
1235	foreach spec $args {
1236	if { [info exists _settings($_first-$spec)] } {
1237	# Reset global setting with dataobj specific setting
1238	set _settings($spec) $_settings($_first-$spec)
1239	}
1240	AdjustSetting $spec
1241	}
1242	}
1243
1244	#
1245	# AdjustSetting --
1246	#
1247	# Changes/updates a specific setting in the widget. There are
1248	# usually user-setable option. Commands are sent to the render
1249	# server.
1250	#
1251	itcl::body Rappture::VtkSurfaceViewer::AdjustSetting {what {value ""}} {
1252	if { ![isconnected] } {
1253	return
1254	}
1255	switch -- $what {
1256	"-axesvisible" {
1257	set bool $_settings($what)
1258	SendCmd "axis visible all $bool"
1259	}
1260	"-axislabels" {
1261	set bool $_settings($what)
1262	SendCmd "axis labels all $bool"
1263	}
1264	"-axisminorticks" {
1265	set bool $_settings($what)
1266	SendCmd "axis minticks all $bool"
1267	}
1268	"-axismode" {
1269	set mode [$itk_component(axisMode) value]
1270	set mode [$itk_component(axisMode) translate $mode]
1271	set _settings($what) $mode
1272	SendCmd "axis flymode $mode"
1273	}
1274	"-background" {
1275	set bgcolor [$itk_component(background) value]
1276	array set fgcolors {
1277	"black" "white"
1278	"white" "black"
1279	"grey" "black"
1280	}
1281	configure -plotbackground $bgcolor \
1282	-plotforeground $fgcolors($bgcolor)
1283	$itk_component(view) delete "legend"
1284	DrawLegend
1285	}
1286	"-colormap" {
1287	set _changed($what) 1
1288	StartBufferingCommands
1289	set color [$itk_component(colormap) value]
1290	set _settings($what) $color
1291	if { $color == "none" } {
1292	if { $_settings(-colormapvisible) } {
1293	SendCmd "contour2d colormode constant {}"
1294	SendCmd "polydata colormode constant {}"
1295	set _settings(-colormapvisible) 0
1296	}
1297	} else {
1298	if { !$_settings(-colormapvisible) } {
1299	#SendCmd "contour2d colormode $_colorMode $_curFldName"
1300	SendCmd "polydata colormode $_colorMode $_curFldName"
1301	set _settings(-colormapvisible) 1
1302	}
1303	SetCurrentColormap $color
1304	if {$_settings(-colormapdiscrete)} {
1305	set numColors [expr $_settings(-numcontours) + 1]
1306	SendCmd "colormap res $numColors $color"
1307	}
1308	}
1309	StopBufferingCommands
1310	EventuallyRequestLegend
1311	}
1312	"-colormapdiscrete" {
1313	set bool $_settings($what)
1314	set numColors [expr $_settings(-numcontours) + 1]
1315	StartBufferingCommands
1316	if {$bool} {
1317	SendCmd "colormap res $numColors"
1318	# Discrete colormap requires preinterp on
1319	SendCmd "polydata preinterp on"
1320	} else {
1321	SendCmd "colormap res default"
1322	# FIXME: add setting for preinterp (default on)
1323	SendCmd "polydata preinterp on"
1324	}
1325	StopBufferingCommands
1326	EventuallyRequestLegend
1327	}
1328	"-field" {
1329	set label [$itk_component(field) value]
1330	set fname [$itk_component(field) translate $label]
1331	set _settings($what) $fname
1332	if { [info exists _fields($fname)] } {
1333	foreach { label units components } $_fields($fname) break
1334	if { $components > 1 } {
1335	set _colorMode vmag
1336	} else {
1337	set _colorMode scalar
1338	}
1339	set _curFldName $fname
1340	set _curFldLabel $label
1341	} else {
1342	puts stderr "unknown field \"$fname\""
1343	return
1344	}
1345	SendCmd "dataset scalar $_curFldName"
1346	if { ![info exists _limits($_curFldName)] } {
1347	SendCmd "dataset maprange all"
1348	} else {
1349	SendCmd "dataset maprange explicit $_limits($_curFldName) $_curFldName"
1350	}
1351	#SendCmd "contour2d colormode $_colorMode $_curFldName"
1352	SendCmd "polydata colormode $_colorMode $_curFldName"
1353	SendCmd "camera reset"
1354	UpdateContourList
1355	DrawLegend
1356	}
1357	"-isolinecolor" {
1358	set color [$itk_component(isolineColor) value]
1359	set _settings($what) $color
1360	SendCmd "contour2d linecolor [Color2RGB $color]"
1361	DrawLegend
1362	}
1363	"-isolinesvisible" {
1364	set bool $_settings($what)
1365	SendCmd "contour2d visible $bool"
1366	DrawLegend
1367	}
1368	"-legendvisible" {
1369	if { !$_settings($what) } {
1370	$itk_component(view) delete legend
1371	}
1372	DrawLegend
1373	}
1374	"-numcontours" {
1375	set _settings($what) [$itk_component(numcontours) value]
1376	set _currentNumContours $_settings($what)
1377	UpdateContourList
1378	set _changed($what) 1
1379	SendCmd "contour2d contourlist [list $_contourList]"
1380	if {$_settings(-colormapdiscrete)} {
1381	set numColors [expr $_settings($what) + 1]
1382	SendCmd "colormap res $numColors"
1383	EventuallyRequestLegend
1384	} else {
1385	DrawLegend
1386	}
1387	}
1388	"-outline" {
1389	set bool $_settings($what)
1390	SendCmd "outline visible $bool"
1391	}
1392	"-surfaceedges" {
1393	set bool $_settings($what)
1394	SendCmd "polydata edges $bool"
1395	}
1396	"-surfacelighting" {
1397	set bool $_settings($what)
1398	SendCmd "polydata lighting $bool"
1399	}
1400	"-surfaceopacity" {
1401	set val $_settings($what)
1402	set sval [expr { 0.01 * double($val) }]
1403	SendCmd "polydata opacity $sval"
1404	}
1405	"-surfacevisible" {
1406	set bool $_settings($what)
1407	SendCmd "polydata visible $bool"
1408	if { $bool } {
1409	Rappture::Tooltip::for $itk_component(surface) \
1410	"Hide the surface"
1411	} else {
1412	Rappture::Tooltip::for $itk_component(surface) \
1413	"Show the surface"
1414	}
1415	DrawLegend
1416	}
1417	"-surfacewireframe" {
1418	set bool $_settings($what)
1419	SendCmd "polydata wireframe $bool"
1420	}
1421	"-xgrid" - "-ygrid" - "-zgrid" {
1422	set axis [string tolower [string range $what 1 1]]
1423	set bool $_settings($what)
1424	SendCmd "axis grid $axis $bool"
1425	}
1426	default {
1427	error "don't know how to fix $what"
1428	}
1429	}
1430	}
1431
1432	#
1433	# RequestLegend --
1434	#
1435	# Request a new legend from the server. The size of the legend
1436	# is determined from the height of the canvas.
1437	#
1438	# This should be called when
1439	# 1. A new current colormap is set.
1440	# 2. Window is resized.
1441	# 3. The limits of the data have changed. (Just need a redraw).
1442	# 4. Number of isolines have changed. (Just need a redraw).
1443	# 5. Legend becomes visible (Just need a redraw).
1444	#
1445	itcl::body Rappture::VtkSurfaceViewer::RequestLegend {} {
1446	set _legendPending 0
1447	if { ![info exists _fields($_curFldName)] } {
1448	return
1449	}
1450	set fname $_curFldName
1451	set font "Arial 8"
1452	set lineht [font metrics $font -linespace]
1453	set w 12
1454	set h [expr {$_height - 2 * ($lineht + 2)}]
1455	if { $h < 1 } {
1456	return
1457	}
1458	if { [string match "component*" $fname] } {
1459	set title ""
1460	} else {
1461	if { [info exists _fields($fname)] } {
1462	foreach { title units } $_fields($fname) break
1463	if { $units != "" } {
1464	set title [format "%s (%s)" $title $units]
1465	}
1466	} else {
1467	set title $fname
1468	}
1469	}
1470	# If there's a title too, subtract one more line
1471	if { $title != "" } {
1472	incr h -$lineht
1473	}
1474	# Set the legend on the first heightmap dataset.
1475	if { $_currentColormap != "" } {
1476	set cmap $_currentColormap
1477	SendCmdNoWait "legend $cmap scalar $_curFldName {} $w $h 0"
1478	}
1479	}
1480
1481	# ----------------------------------------------------------------------
1482	# CONFIGURATION OPTION: -plotbackground
1483	# ----------------------------------------------------------------------
1484	itcl::configbody Rappture::VtkSurfaceViewer::plotbackground {
1485	if { [isconnected] } {
1486	set rgb [Color2RGB $itk_option(-plotbackground)]
1487	SendCmd "screen bgcolor $rgb"
1488	}
1489	}
1490
1491	# ----------------------------------------------------------------------
1492	# CONFIGURATION OPTION: -plotforeground
1493	# ----------------------------------------------------------------------
1494	itcl::configbody Rappture::VtkSurfaceViewer::plotforeground {
1495	if { [isconnected] } {
1496	set rgb [Color2RGB $itk_option(-plotforeground)]
1497	SendCmd "axis color all $rgb"
1498	SendCmd "outline color $rgb"
1499	}
1500	}
1501
1502	itcl::body Rappture::VtkSurfaceViewer::BuildSurfaceTab {} {
1503
1504	set fg [option get $itk_component(hull) font Font]
1505	#set bfg [option get $itk_component(hull) boldFont Font]
1506
1507	set inner [$itk_component(main) insert end \
1508	-title "Surface Settings" \
1509	-icon [Rappture::icon volume-on]]
1510	$inner configure -borderwidth 4
1511
1512	checkbutton $inner.surface \
1513	-text "Surface" \
1514	-variable [itcl::scope _settings(-surfacevisible)] \
1515	-command [itcl::code $this AdjustSetting -surfacevisible] \
1516	-font "Arial 9"
1517
1518	checkbutton $inner.isolines \
1519	-text "Isolines" \
1520	-variable [itcl::scope _settings(-isolinesvisible)] \
1521	-command [itcl::code $this AdjustSetting -isolinesvisible] \
1522	-font "Arial 9"
1523
1524	checkbutton $inner.colormapDiscrete \
1525	-text "Discrete Colormap" \
1526	-variable [itcl::scope _settings(-colormapdiscrete)] \
1527	-command [itcl::code $this AdjustSetting -colormapdiscrete] \
1528	-font "Arial 9"
1529
1530	checkbutton $inner.wireframe \
1531	-text "Wireframe" \
1532	-variable [itcl::scope _settings(-surfacewireframe)] \
1533	-command [itcl::code $this AdjustSetting -surfacewireframe] \
1534	-font "Arial 9"
1535
1536	checkbutton $inner.lighting \
1537	-text "Enable Lighting" \
1538	-variable [itcl::scope _settings(-surfacelighting)] \
1539	-command [itcl::code $this AdjustSetting -surfacelighting] \
1540	-font "Arial 9"
1541
1542	checkbutton $inner.edges \
1543	-text "Edges" \
1544	-variable [itcl::scope _settings(-surfaceedges)] \
1545	-command [itcl::code $this AdjustSetting -surfaceedges] \
1546	-font "Arial 9"
1547
1548	checkbutton $inner.outline \
1549	-text "Outline" \
1550	-variable [itcl::scope _settings(-outline)] \
1551	-command [itcl::code $this AdjustSetting -outline] \
1552	-font "Arial 9"
1553
1554	checkbutton $inner.legend \
1555	-text "Legend" \
1556	-variable [itcl::scope _settings(-legendvisible)] \
1557	-command [itcl::code $this AdjustSetting -legendvisible] \
1558	-font "Arial 9"
1559
1560	label $inner.linecolor_l -text "Isolines" -font "Arial 9"
1561	itk_component add isolineColor {
1562	Rappture::Combobox $inner.linecolor -width 10 -editable 0
1563	}
1564	$inner.linecolor choices insert end \
1565	"black" "black" \
1566	"blue" "blue" \
1567	"cyan" "cyan" \
1568	"green" "green" \
1569	"grey" "grey" \
1570	"magenta" "magenta" \
1571	"orange" "orange" \
1572	"red" "red" \
1573	"white" "white" \
1574	"none" "none"
1575
1576	$itk_component(isolineColor) value "white"
1577	bind $inner.linecolor <<Value>> \
1578	[itcl::code $this AdjustSetting -isolinecolor]
1579
1580	label $inner.background_l -text "Background" -font "Arial 9"
1581	itk_component add background {
1582	Rappture::Combobox $inner.background -width 10 -editable 0
1583	}
1584	$inner.background choices insert end \
1585	"black" "black" \
1586	"white" "white" \
1587	"grey" "grey"
1588
1589	$itk_component(background) value $_settings(-background)
1590	bind $inner.background <<Value>> \
1591	[itcl::code $this AdjustSetting -background]
1592
1593	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1594	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1595	-variable [itcl::scope _settings(-surfaceopacity)] \
1596	-width 10 \
1597	-showvalue off \
1598	-command [itcl::code $this AdjustSetting -surfaceopacity]
1599
1600	itk_component add field_l {
1601	label $inner.field_l -text "Field" -font "Arial 9"
1602	} {
1603	ignore -font
1604	}
1605	itk_component add field {
1606	Rappture::Combobox $inner.field -width 10 -editable 0
1607	}
1608	bind $inner.field <<Value>> \
1609	[itcl::code $this AdjustSetting -field]
1610
1611	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1612	itk_component add colormap {
1613	Rappture::Combobox $inner.colormap -width 10 -editable 0
1614	}
1615	$inner.colormap choices insert end [GetColormapList]
1616
1617	$itk_component(colormap) value "BCGYR"
1618	bind $inner.colormap <<Value>> \
1619	[itcl::code $this AdjustSetting -colormap]
1620
1621	label $inner.numcontours_l -text "Number of Isolines" -font "Arial 9"
1622	itk_component add numcontours {
1623	Rappture::Spinint $inner.numcontours \
1624	-min 0 -max 50 -font "arial 9"
1625	}
1626	$itk_component(numcontours) value $_settings(-numcontours)
1627	bind $itk_component(numcontours) <<Value>> \
1628	[itcl::code $this AdjustSetting -numcontours]
1629
1630	blt::table $inner \
1631	0,0 $inner.field_l -anchor w -pady 2 \
1632	0,1 $inner.field -anchor w -pady 2 -fill x \
1633	1,0 $inner.colormap_l -anchor w -pady 2 \
1634	1,1 $inner.colormap -anchor w -pady 2 -fill x \
1635	2,0 $inner.linecolor_l -anchor w -pady 2 \
1636	2,1 $inner.linecolor -anchor w -pady 2 -fill x \
1637	3,0 $inner.background_l -anchor w -pady 2 \
1638	3,1 $inner.background -anchor w -pady 2 -fill x \
1639	4,0 $inner.numcontours_l -anchor w -pady 2 \
1640	4,1 $inner.numcontours -anchor w -pady 2 \
1641	5,0 $inner.colormapDiscrete -anchor w -pady 2 -cspan 2 \
1642	6,0 $inner.isolines -anchor w -pady 2 -cspan 2 \
1643	7,0 $inner.wireframe -anchor w -pady 2 -cspan 2 \
1644	8,0 $inner.lighting -anchor w -pady 2 -cspan 2 \
1645	9,0 $inner.edges -anchor w -pady 2 -cspan 2 \
1646	10,0 $inner.outline -anchor w -pady 2 -cspan 2 \
1647	11,0 $inner.legend -anchor w -pady 2 \
1648	12,0 $inner.opacity_l -anchor w -pady 2 \
1649	12,1 $inner.opacity -fill x -pady 2 -fill x \
1650
1651	blt::table configure $inner r* c* -resize none
1652	blt::table configure $inner r13 c1 -resize expand
1653	}
1654
1655	itcl::body Rappture::VtkSurfaceViewer::BuildAxisTab {} {
1656
1657	set fg [option get $itk_component(hull) font Font]
1658	#set bfg [option get $itk_component(hull) boldFont Font]
1659
1660	set inner [$itk_component(main) insert end \
1661	-title "Axis Settings" \
1662	-icon [Rappture::icon axis2]]
1663	$inner configure -borderwidth 4
1664
1665	checkbutton $inner.visible \
1666	-text "Axes" \
1667	-variable [itcl::scope _settings(-axesvisible)] \
1668	-command [itcl::code $this AdjustSetting -axesvisible] \
1669	-font "Arial 9"
1670
1671	checkbutton $inner.labels \
1672	-text "Axis Labels" \
1673	-variable [itcl::scope _settings(-axislabels)] \
1674	-command [itcl::code $this AdjustSetting -axislabels] \
1675	-font "Arial 9"
1676	label $inner.grid_l -text "Grid" -font "Arial 9"
1677	checkbutton $inner.xgrid \
1678	-text "X" \
1679	-variable [itcl::scope _settings(-xgrid)] \
1680	-command [itcl::code $this AdjustSetting -xgrid] \
1681	-font "Arial 9"
1682	checkbutton $inner.ygrid \
1683	-text "Y" \
1684	-variable [itcl::scope _settings(-ygrid)] \
1685	-command [itcl::code $this AdjustSetting -ygrid] \
1686	-font "Arial 9"
1687	checkbutton $inner.zgrid \
1688	-text "Z" \
1689	-variable [itcl::scope _settings(-zgrid)] \
1690	-command [itcl::code $this AdjustSetting -zgrid] \
1691	-font "Arial 9"
1692	checkbutton $inner.minorticks \
1693	-text "Minor Ticks" \
1694	-variable [itcl::scope _settings(-axisminorticks)] \
1695	-command [itcl::code $this AdjustSetting -axisminorticks] \
1696	-font "Arial 9"
1697
1698	label $inner.mode_l -text "Mode" -font "Arial 9"
1699
1700	itk_component add axisMode {
1701	Rappture::Combobox $inner.mode -width 10 -editable 0
1702	}
1703	$inner.mode choices insert end \
1704	"static_triad" "static" \
1705	"closest_triad" "closest" \
1706	"furthest_triad" "farthest" \
1707	"outer_edges" "outer"
1708	$itk_component(axisMode) value $_settings(-axismode)
1709	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting -axismode]
1710
1711	blt::table $inner \
1712	0,0 $inner.visible -anchor w -cspan 4 \
1713	1,0 $inner.labels -anchor w -cspan 4 \
1714	2,0 $inner.minorticks -anchor w -cspan 4 \
1715	4,0 $inner.grid_l -anchor w \
1716	4,1 $inner.xgrid -anchor w \
1717	4,2 $inner.ygrid -anchor w \
1718	4,3 $inner.zgrid -anchor w \
1719	5,0 $inner.mode_l -anchor w -padx { 2 0 } \
1720	5,1 $inner.mode -fill x -cspan 3
1721
1722	blt::table configure $inner r* c* -resize none
1723	blt::table configure $inner r7 c6 -resize expand
1724	blt::table configure $inner r3 -height 0.125i
1725	}
1726
1727	itcl::body Rappture::VtkSurfaceViewer::BuildCameraTab {} {
1728	set inner [$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	blt::table configure $inner r0 -resize none
1746
1747	set labels { qx qy qz qw xpan ypan zoom }
1748	set row 1
1749	foreach tag $labels {
1750	label $inner.${tag}label -text $tag -font "Arial 9"
1751	entry $inner.${tag} -font "Arial 9" -bg white \
1752	-textvariable [itcl::scope _view(-$tag)]
1753	bind $inner.${tag} <Return> \
1754	[itcl::code $this camera set -${tag}]
1755	bind $inner.${tag} <KP_Enter> \
1756	[itcl::code $this camera set -${tag}]
1757	blt::table $inner \
1758	$row,0 $inner.${tag}label -anchor e -pady 2 \
1759	$row,1 $inner.${tag} -anchor w -pady 2
1760	blt::table configure $inner r$row -resize none
1761	incr row
1762	}
1763	checkbutton $inner.ortho \
1764	-text "Orthographic Projection" \
1765	-variable [itcl::scope _view(-ortho)] \
1766	-command [itcl::code $this camera set -ortho] \
1767	-font "Arial 9"
1768	blt::table $inner \
1769	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1770	blt::table configure $inner r$row -resize none
1771	incr row
1772
1773	blt::table configure $inner c* -resize none
1774	blt::table configure $inner c2 -resize expand
1775	blt::table configure $inner r$row -resize expand
1776	}
1777
1778	#
1779	# camera --
1780	#
1781	itcl::body Rappture::VtkSurfaceViewer::camera {option args} {
1782	switch -- $option {
1783	"show" {
1784	puts [array get _view]
1785	}
1786	"set" {
1787	set what [lindex $args 0]
1788	set x $_view($what)
1789	set code [catch { string is double $x } result]
1790	if { $code != 0 \|\| !$result } {
1791	return
1792	}
1793	switch -- $what {
1794	"-ortho" {
1795	if {$_view($what)} {
1796	SendCmd "camera mode ortho"
1797	} else {
1798	SendCmd "camera mode persp"
1799	}
1800	}
1801	"-xpan" - "-ypan" {
1802	PanCamera
1803	}
1804	"-qx" - "-qy" - "-qz" - "-qw" {
1805	set q [ViewToQuaternion]
1806	$_arcball quaternion $q
1807	EventuallyRotate $q
1808	}
1809	"-zoom" {
1810	SendCmd "camera zoom $_view($what)"
1811	}
1812	}
1813	}
1814	}
1815	}
1816
1817	itcl::body Rappture::VtkSurfaceViewer::GetVtkData { args } {
1818	set bytes ""
1819	foreach dataobj [get] {
1820	foreach cname [$dataobj components] {
1821	set tag $dataobj-$cname
1822	set contents [$dataobj vtkdata $cname]
1823	append bytes "$contents\n"
1824	}
1825	}
1826	return [list .vtk $bytes]
1827	}
1828
1829	itcl::body Rappture::VtkSurfaceViewer::GetImage { args } {
1830	if { [image width $_image(download)] > 0 &&
1831	[image height $_image(download)] > 0 } {
1832	set bytes [$_image(download) data -format "jpeg -quality 100"]
1833	set bytes [Rappture::encoding::decode -as b64 $bytes]
1834	return [list .jpg $bytes]
1835	}
1836	return ""
1837	}
1838
1839	itcl::body Rappture::VtkSurfaceViewer::BuildDownloadPopup { popup command } {
1840	Rappture::Balloon $popup \
1841	-title "[Rappture::filexfer::label downloadWord] as..."
1842	set inner [$popup component inner]
1843	label $inner.summary -text "" -anchor w
1844	radiobutton $inner.vtk_button -text "VTK data file" \
1845	-variable [itcl::scope _downloadPopup(format)] \
1846	-font "Arial 9 " \
1847	-value vtk
1848	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
1849	radiobutton $inner.image_button -text "Image File" \
1850	-variable [itcl::scope _downloadPopup(format)] \
1851	-font "Arial 9 " \
1852	-value image
1853	Rappture::Tooltip::for $inner.image_button \
1854	"Save as digital image."
1855
1856	button $inner.ok -text "Save" \
1857	-highlightthickness 0 -pady 2 -padx 3 \
1858	-command $command \
1859	-compound left \
1860	-image [Rappture::icon download]
1861
1862	button $inner.cancel -text "Cancel" \
1863	-highlightthickness 0 -pady 2 -padx 3 \
1864	-command [list $popup deactivate] \
1865	-compound left \
1866	-image [Rappture::icon cancel]
1867
1868	blt::table $inner \
1869	0,0 $inner.summary -cspan 2 \
1870	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
1871	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
1872	4,1 $inner.cancel -width .9i -fill y \
1873	4,0 $inner.ok -padx 2 -width .9i -fill y
1874	blt::table configure $inner r3 -height 4
1875	blt::table configure $inner r4 -pady 4
1876	raise $inner.image_button
1877	$inner.vtk_button invoke
1878	return $inner
1879	}
1880
1881	itcl::body Rappture::VtkSurfaceViewer::SetObjectStyle { dataobj comp } {
1882	# Parse style string.
1883	set tag $dataobj-$comp
1884	array set style {
1885	-color BCGYR
1886	-edgecolor black
1887	-edges 0
1888	-isolinecolor white
1889	-isolinesvisible 0
1890	-levels 10
1891	-lighting 1
1892	-linewidth 1.0
1893	-opacity 1.0
1894	-outline 0
1895	-surfacevisible 1
1896	-wireframe 0
1897	}
1898	array set style [$dataobj style $comp]
1899	if { $dataobj != $_first \|\| $style(-levels) == 1 } {
1900	set style(-opacity) 1.0
1901	}
1902
1903	# This is too complicated. We want to set the colormap, number of
1904	# isolines and opacity for the dataset. They can be the default values,
1905	# the style hints loaded with the dataset, or set by user controls. As
1906	# datasets get loaded, they first use the defaults that are overidden
1907	# by the style hints. If the user changes the global controls, then that
1908	# overrides everything else. I don't know what it means when global
1909	# controls are specified as style hints by each dataset. It complicates
1910	# the code to handle aberrant cases.
1911
1912	if { $_changed(-surfaceopacity) } {
1913	set style(-opacity) [expr $_settings(-surfaceopacity) * 0.01]
1914	}
1915	if { $_changed(-numcontours) } {
1916	set style(-levels) $_settings(-numcontours)
1917	}
1918	if { $_changed(-colormap) } {
1919	set style(-color) $_settings(-colormap)
1920	}
1921	if { $_currentColormap == "" } {
1922	SetCurrentColormap $style(-color)
1923	$itk_component(colormap) value $style(-color)
1924	}
1925	if { $_currentNumContours != $style(-levels) } {
1926	set _currentNumContours $style(-levels)
1927	set _settings(-numcontours) $_currentNumContours
1928	$itk_component(numcontours) value $_currentNumContours
1929	UpdateContourList
1930	DrawLegend
1931	}
1932	set _settings(-isolinesvisible) $style(-isolinesvisible)
1933	set _settings(-surfacevisible) $style(-surfacevisible)
1934
1935	SendCmd "outline add $tag"
1936	SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
1937	SendCmd "outline visible $style(-outline) $tag"
1938	set _settings(-outline) $style(-outline)
1939
1940	SendCmd "polydata add $tag"
1941	SendCmd "polydata edges $style(-edges) $tag"
1942	set _settings(-surfaceedges) $style(-edges)
1943	#SendCmd "polydata color [Color2RGB $settings(-color)] $tag"
1944	SendCmd "polydata lighting $style(-lighting) $tag"
1945	set _settings(-surfacelighting) $style(-lighting)
1946	SendCmd "polydata linecolor [Color2RGB $style(-edgecolor)] $tag"
1947	SendCmd "polydata linewidth $style(-linewidth) $tag"
1948	SendCmd "polydata opacity $style(-opacity) $tag"
1949	set _settings(-surfaceopacity) [expr $style(-opacity) * 100.0]
1950	SetCurrentColormap $style(-color)
1951	SendCmd "polydata wireframe $style(-wireframe) $tag"
1952	set _settings(-surfacewireframe) $style(-wireframe)
1953
1954	SendCmd [list contour2d add contourlist $_contourList $tag]
1955	SendCmd "contour2d colormode constant {} $tag"
1956	SendCmd "contour2d color [Color2RGB $style(-isolinecolor)] $tag"
1957	}
1958
1959	itcl::body Rappture::VtkSurfaceViewer::IsValidObject { dataobj } {
1960	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
1961	return 0
1962	}
1963	return 1
1964	}
1965
1966	#
1967	# EnterLegend --
1968	#
1969	itcl::body Rappture::VtkSurfaceViewer::EnterLegend { x y } {
1970	SetLegendTip $x $y
1971	}
1972
1973	#
1974	# MotionLegend --
1975	#
1976	itcl::body Rappture::VtkSurfaceViewer::MotionLegend { x y } {
1977	Rappture::Tooltip::tooltip cancel
1978	set c $itk_component(view)
1979	set cw [winfo width $c]
1980	set ch [winfo height $c]
1981	if { $x >= 0 && $x < $cw && $y >= 0 && $y < $ch } {
1982	SetLegendTip $x $y
1983	}
1984	}
1985
1986	#
1987	# LeaveLegend --
1988	#
1989	itcl::body Rappture::VtkSurfaceViewer::LeaveLegend { } {
1990	Rappture::Tooltip::tooltip cancel
1991	.rappturetooltip configure -icon ""
1992	}
1993
1994	#
1995	# SetLegendTip --
1996	#
1997	itcl::body Rappture::VtkSurfaceViewer::SetLegendTip { x y } {
1998	set fname $_curFldName
1999	set c $itk_component(view)
2000	set w [winfo width $c]
2001	set h [winfo height $c]
2002
2003	set font "Arial 8"
2004	set lineht [font metrics $font -linespace]
2005
2006	set ih [image height $_image(legend)]
2007	set iy [expr $y - ($lineht + 2)]
2008
2009	if { [string match "component*" $fname] } {
2010	set title ""
2011	} else {
2012	if { [info exists _fields($fname)] } {
2013	foreach { title units } $_fields($fname) break
2014	if { $units != "" } {
2015	set title [format "%s (%s)" $title $units]
2016	}
2017	} else {
2018	set title $fname
2019	}
2020	}
2021	# If there's a legend title, increase the offset by the line height.
2022	if { $title != "" } {
2023	incr iy -$lineht
2024	}
2025	# Make a swatch of the selected color
2026	if { [catch { $_image(legend) get 10 $iy } pixel] != 0 } {
2027	return
2028	}
2029	if { ![info exists _image(swatch)] } {
2030	set _image(swatch) [image create photo -width 24 -height 24]
2031	}
2032	set color [eval format "\#%02x%02x%02x" $pixel]
2033	$_image(swatch) put black -to 0 0 23 23
2034	$_image(swatch) put $color -to 1 1 22 22
2035	.rappturetooltip configure -icon $_image(swatch)
2036
2037	# Compute the value of the point
2038	if { [info exists _limits($_curFldName)] } {
2039	foreach { vmin vmax } $_limits($_curFldName) break
2040	set t [expr 1.0 - (double($iy) / double($ih-1))]
2041	set value [expr $t * ($vmax - $vmin) + $vmin]
2042	} else {
2043	set value 0.0
2044	}
2045	set tx [expr $x + 15]
2046	set ty [expr $y - 5]
2047	if { [info exists _isolines($y)] } {
2048	Rappture::Tooltip::text $c [format "$title %g (isoline)" $_isolines($y)]
2049	} else {
2050	Rappture::Tooltip::text $c [format "$title %g" $value]
2051	}
2052	Rappture::Tooltip::tooltip show $c +$tx,+$ty
2053	}
2054
2055	#
2056	# ReceiveLegend --
2057	#
2058	# Invoked automatically whenever the "legend" command comes in from
2059	# the rendering server. Indicates that binary image data with the
2060	# specified <size> will follow.
2061	#
2062	itcl::body Rappture::VtkSurfaceViewer::ReceiveLegend { colormap title min max size } {
2063	#puts stderr "ReceiveLegend colormap=$colormap title=$title range=$min,$max size=$size"
2064	set _title $title
2065	regsub {\(mag\)} $title "" _title
2066	if { [IsConnected] } {
2067	set bytes [ReceiveBytes $size]
2068	if { ![info exists _image(legend)] } {
2069	set _image(legend) [image create photo]
2070	}
2071	$_image(legend) configure -data $bytes
2072	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2073	if { [catch {DrawLegend} errs] != 0 } {
2074	global errorInfo
2075	puts stderr "errs=$errs errorInfo=$errorInfo"
2076	}
2077	}
2078	}
2079
2080	#
2081	# DrawLegend --
2082	#
2083	# Draws the legend in the own canvas on the right side of the plot area.
2084	#
2085	itcl::body Rappture::VtkSurfaceViewer::DrawLegend {} {
2086	set fname $_curFldName
2087	set c $itk_component(view)
2088	set w [winfo width $c]
2089	set h [winfo height $c]
2090	set font "Arial 8"
2091	set lineht [font metrics $font -linespace]
2092
2093	if { [string match "component*" $fname] } {
2094	set title ""
2095	} else {
2096	if { [info exists _fields($fname)] } {
2097	foreach { title units } $_fields($fname) break
2098	if { $units != "" } {
2099	set title [format "%s (%s)" $title $units]
2100	}
2101	} else {
2102	set title $fname
2103	}
2104	}
2105	set x [expr $w - 2]
2106	if { !$_settings(-legendvisible) } {
2107	$c delete legend
2108	return
2109	}
2110	if { [$c find withtag "legend"] == "" } {
2111	set y 2
2112	# If there's a legend title, create a text item for the title.
2113	$c create text $x $y \
2114	-anchor ne \
2115	-fill $itk_option(-plotforeground) -tags "title legend" \
2116	-font $font
2117	if { $title != "" } {
2118	incr y $lineht
2119	}
2120	$c create text $x $y \
2121	-anchor ne \
2122	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2123	-font $font
2124	incr y $lineht
2125	$c create image $x $y \
2126	-anchor ne \
2127	-image $_image(legend) -tags "colormap legend"
2128	$c create rectangle $x $y 1 1 \
2129	-fill "" -outline "" -tags "sensor legend"
2130	$c create text $x [expr {$h-2}] \
2131	-anchor se \
2132	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2133	-font $font
2134	$c bind sensor <Enter> [itcl::code $this EnterLegend %x %y]
2135	$c bind sensor <Leave> [itcl::code $this LeaveLegend]
2136	$c bind sensor <Motion> [itcl::code $this MotionLegend %x %y]
2137	}
2138	$c delete isoline
2139	set x2 $x
2140	set iw [image width $_image(legend)]
2141	set ih [image height $_image(legend)]
2142	set x1 [expr $x2 - ($iw*12)/10]
2143	set color $_settings(-isolinecolor)
2144	# Draw the isolines on the legend.
2145	array unset _isolines
2146	if { $color != "none" && [info exists _limits($_curFldName)] &&
2147	$_settings(-isolinesvisible) && $_settings(-numcontours) > 0 } {
2148
2149	foreach { vmin vmax } $_limits($_curFldName) break
2150	set range [expr double($vmax - $vmin)]
2151	if { $range <= 0.0 } {
2152	set range 1.0; # Min is greater or equal to max.
2153	}
2154	set tags "isoline legend"
2155	set offset [expr 2 + $lineht]
2156	if { $title != "" } {
2157	incr offset $lineht
2158	}
2159	foreach value $_contourList {
2160	set norm [expr 1.0 - (($value - $vmin) / $range)]
2161	set y1 [expr int(round(($norm * $ih) + $offset))]
2162	for { set off 0 } { $off < 3 } { incr off } {
2163	set _isolines([expr $y1 + $off]) $value
2164	set _isolines([expr $y1 - $off]) $value
2165	}
2166	$c create line $x1 $y1 $x2 $y1 -fill $color -tags $tags
2167	}
2168	}
2169
2170	$c bind title <ButtonPress> [itcl::code $this Combo post]
2171	$c bind title <Enter> [itcl::code $this Combo activate]
2172	$c bind title <Leave> [itcl::code $this Combo deactivate]
2173	# Reset the item coordinates according the current size of the plot.
2174	$c itemconfigure title -text $title
2175	if { [info exists _limits($_curFldName)] } {
2176	foreach { vmin vmax } $_limits($_curFldName) break
2177	$c itemconfigure vmin -text [format %g $vmin]
2178	$c itemconfigure vmax -text [format %g $vmax]
2179	}
2180	set y 2
2181	# If there's a legend title, move the title to the correct position
2182	if { $title != "" } {
2183	$c itemconfigure title -text $title
2184	$c coords title $x $y
2185	incr y $lineht
2186	$c raise title
2187	}
2188	$c coords vmax $x $y
2189	incr y $lineht
2190	$c coords colormap $x $y
2191	$c coords sensor [expr $x - $iw] $y $x [expr $y + $ih]
2192	$c raise sensor
2193	$c coords vmin $x [expr {$h - 2}]
2194	}
2195
2196	# ----------------------------------------------------------------------
2197	# USAGE: _dropdown post
2198	# USAGE: _dropdown unpost
2199	# USAGE: _dropdown select
2200	#
2201	# Used internally to handle the dropdown list for this combobox. The
2202	# post/unpost options are invoked when the list is posted or unposted
2203	# to manage the relief of the controlling button. The select option
2204	# is invoked whenever there is a selection from the list, to assign
2205	# the value back to the gauge.
2206	# ----------------------------------------------------------------------
2207	itcl::body Rappture::VtkSurfaceViewer::Combo {option} {
2208	set c $itk_component(view)
2209	switch -- $option {
2210	post {
2211	foreach { x1 y1 x2 y2 } [$c bbox title] break
2212	set cw [winfo width $itk_component(view)]
2213	set mw [winfo reqwidth $itk_component(fieldmenu)]
2214	set x1 [expr $cw - $mw]
2215	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2216	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2217	tk_popup $itk_component(fieldmenu) $x $y
2218	}
2219	activate {
2220	$c itemconfigure title -fill red
2221	}
2222	deactivate {
2223	$c itemconfigure title -fill $itk_option(-plotforeground)
2224	}
2225	invoke {
2226	$itk_component(field) value $_curFldLabel
2227	AdjustSetting -field
2228	}
2229	default {
2230	error "bad option \"$option\": should be post, unpost, select"
2231	}
2232	}
2233	}
2234
2235	#
2236	# SetCurrentColormap --
2237	#
2238	itcl::body Rappture::VtkSurfaceViewer::SetCurrentColormap { name } {
2239	# Keep track of the colormaps that we build.
2240	if { ![info exists _colormaps($name)] } {
2241	BuildColormap $name
2242	set _colormaps($name) 1
2243	}
2244	set _currentColormap $name
2245	SendCmd "contour2d colormap $_currentColormap"
2246	SendCmd "polydata colormap $_currentColormap"
2247	}
2248
2249	#
2250	# BuildColormap --
2251	#
2252	# Build the designated colormap on the server.
2253	#
2254	itcl::body Rappture::VtkSurfaceViewer::BuildColormap { name } {
2255	set cmap [ColorsToColormap $name]
2256	if { [llength $cmap] == 0 } {
2257	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
2258	}
2259	set wmap "0.0 1.0 1.0 1.0"
2260	SendCmd "colormap add $name { $cmap } { $wmap }"
2261	}
2262
2263	itcl::body Rappture::VtkSurfaceViewer::SetOrientation { side } {
2264	array set positions {
2265	front "1 0 0 0"
2266	back "0 0 1 0"
2267	left "0.707107 0 -0.707107 0"
2268	right "0.707107 0 0.707107 0"
2269	top "0.707107 -0.707107 0 0"
2270	bottom "0.707107 0.707107 0 0"
2271	}
2272	foreach name { -qw -qx -qy -qz } value $positions($side) {
2273	set _view($name) $value
2274	}
2275	set q [ViewToQuaternion]
2276	$_arcball quaternion $q
2277	SendCmd "camera orient $q"
2278	SendCmd "camera reset"
2279	set _view(-xpan) 0
2280	set _view(-ypan) 0
2281	set _view(-zoom) 1.0
2282	}
2283
2284	itcl::body Rappture::VtkSurfaceViewer::UpdateContourList {} {
2285	if { ![info exists _limits($_curFldName)] } {
2286	return
2287	}
2288	if { $_currentNumContours < 1 } {
2289	set _contourList ""
2290	return
2291	}
2292	foreach { vmin vmax } $_limits($_curFldName) break
2293	set v [blt::vector create \#auto]
2294	$v seq $vmin $vmax [expr $_currentNumContours+2]
2295	$v delete end 0
2296	set _contourList [$v range 0 end]
2297	blt::vector destroy $v
2298	}

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