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source: trunk/gui/scripts/vtksurfaceviewer.tcl @ 5157

Last change on this file since 5157 was 5157, checked in by ldelgass, 9 years ago
Surface viewer fixes (based on changes from isosurface viewer)
File size: 79.3 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; # Connection to server has been reset.
134
135	private variable _first "" ; # This is the topmost dataset.
136	private variable _start 0
137	private variable _title ""
138	private variable _isolines
139	private variable _contourList ""
140
141	common _downloadPopup; # download options from popup
142	private common _hardcopy
143	private variable _width 0
144	private variable _height 0
145	private variable _resizePending 0
146	private variable _rotatePending 0
147	private variable _legendPending 0
148	private variable _field ""
149	private variable _colorMode "scalar"; # Mode of colormap (vmag or scalar)
150	private variable _fieldNames {}
151	private variable _fields
152	private variable _curFldName ""
153	private variable _curFldLabel ""
154	}
155
156	itk::usual VtkSurfaceViewer {
157	keep -background -foreground -cursor -font
158	keep -plotbackground -plotforeground
159	}
160
161	# ----------------------------------------------------------------------
162	# CONSTRUCTOR
163	# ----------------------------------------------------------------------
164	itcl::body Rappture::VtkSurfaceViewer::constructor {hostlist args} {
165	package require vtk
166	set _serverType "vtkvis"
167
168	# Rebuild event
169	$_dispatcher register !rebuild
170	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
171
172	# Resize event
173	$_dispatcher register !resize
174	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
175
176	# Rotate event
177	$_dispatcher register !rotate
178	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
179
180	# Legend event
181	$_dispatcher register !legend
182	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
183
184	#
185	# Populate parser with commands handle incoming requests
186	#
187	$_parser alias image [itcl::code $this ReceiveImage]
188	$_parser alias dataset [itcl::code $this ReceiveDataset]
189	$_parser alias legend [itcl::code $this ReceiveLegend]
190
191	# Initialize the view to some default parameters.
192	array set _view {
193	-ortho 0
194	-qw 0.853553
195	-qx -0.353553
196	-qy 0.353553
197	-qz 0.146447
198	-xpan 0
199	-ypan 0
200	-zoom 1.0
201	}
202	set _arcball [blt::arcball create 100 100]
203	$_arcball quaternion [ViewToQuaternion]
204
205	array set _settings {
206	-axesvisible 1
207	-axislabels 1
208	-axisminorticks 1
209	-axismode "static"
210	-background black
211	-colormap BCGYR
212	-colormapvisible 1
213	-field "Default"
214	-isolinecolor white
215	-isolinesvisible 0
216	-legendvisible 1
217	-numcontours 10
218	-outline 0
219	-surfaceedges 0
220	-surfacelighting 1
221	-surfaceopacity 100
222	-surfacevisible 1
223	-surfacewireframe 0
224	-xgrid 0
225	-ygrid 0
226	-zgrid 0
227	}
228	array set _changed {
229	-colormap 0
230	-isolinecolor 0
231	-isolinesvisible 0
232	-numcontours 0
233	-outline 0
234	-surfaceedges 0
235	-surfacelighting 0
236	-surfaceopacity 0
237	-surfacevisible 0
238	-surfacewireframe 0
239	}
240
241	itk_component add view {
242	canvas $itk_component(plotarea).view \
243	-highlightthickness 0 -borderwidth 0
244	} {
245	usual
246	ignore -highlightthickness -borderwidth -background
247	}
248
249	itk_component add fieldmenu {
250	menu $itk_component(plotarea).menu -bg black -fg white -relief flat \
251	-tearoff 0
252	} {
253	usual
254	ignore -background -foreground -relief -tearoff
255	}
256	set c $itk_component(view)
257	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
258	bind $c <4> [itcl::code $this Zoom in 0.25]
259	bind $c <5> [itcl::code $this Zoom out 0.25]
260	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
261	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
262	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
263	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
264	bind $c <Enter> "focus %W"
265	bind $c <Control-F1> [itcl::code $this ToggleConsole]
266
267	# Fix the scrollregion in case we go off screen
268	$c configure -scrollregion [$c bbox all]
269
270	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
271	set _map(cwidth) -1
272	set _map(cheight) -1
273	set _map(zoom) 1.0
274	set _map(original) ""
275
276	set f [$itk_component(main) component controls]
277	itk_component add reset {
278	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
279	-highlightthickness 0 \
280	-image [Rappture::icon reset-view] \
281	-command [itcl::code $this Zoom reset]
282	} {
283	usual
284	ignore -highlightthickness
285	}
286	pack $itk_component(reset) -side top -padx 2 -pady 2
287	Rappture::Tooltip::for $itk_component(reset) \
288	"Reset the view to the default zoom level"
289
290	itk_component add zoomin {
291	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
292	-highlightthickness 0 \
293	-image [Rappture::icon zoom-in] \
294	-command [itcl::code $this Zoom in]
295	} {
296	usual
297	ignore -highlightthickness
298	}
299	pack $itk_component(zoomin) -side top -padx 2 -pady 2
300	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
301
302	itk_component add zoomout {
303	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
304	-highlightthickness 0 \
305	-image [Rappture::icon zoom-out] \
306	-command [itcl::code $this Zoom out]
307	} {
308	usual
309	ignore -highlightthickness
310	}
311	pack $itk_component(zoomout) -side top -padx 2 -pady 2
312	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
313
314	itk_component add surface {
315	Rappture::PushButton $f.surface \
316	-onimage [Rappture::icon volume-on] \
317	-offimage [Rappture::icon volume-off] \
318	-variable [itcl::scope _settings(-surfacevisible)] \
319	-command [itcl::code $this AdjustSetting -surfacevisible]
320	}
321	$itk_component(surface) select
322	Rappture::Tooltip::for $itk_component(surface) \
323	"Hide the surface"
324	pack $itk_component(surface) -padx 2 -pady 2
325
326	if { [catch {
327	BuildSurfaceTab
328	BuildAxisTab
329	BuildCameraTab
330	} errs] != 0 } {
331	puts stderr errs=$errs
332	}
333
334	# Legend
335	set _image(legend) [image create photo]
336	itk_component add legend {
337	canvas $itk_component(plotarea).legend -width 50 -highlightthickness 0
338	} {
339	usual
340	ignore -highlightthickness
341	rename -background -plotbackground plotBackground Background
342	}
343
344	# Hack around the Tk panewindow. The problem is that the requested
345	# size of the 3d view isn't set until an image is retrieved from
346	# the server. So the panewindow uses the tiny size.
347	set w 10000
348	pack forget $itk_component(view)
349	blt::table $itk_component(plotarea) \
350	0,0 $itk_component(view) -fill both -reqwidth $w
351	blt::table configure $itk_component(plotarea) c1 -resize none
352
353	# Bindings for rotation via mouse
354	bind $itk_component(view) <ButtonPress-1> \
355	[itcl::code $this Rotate click %x %y]
356	bind $itk_component(view) <B1-Motion> \
357	[itcl::code $this Rotate drag %x %y]
358	bind $itk_component(view) <ButtonRelease-1> \
359	[itcl::code $this Rotate release %x %y]
360
361	# Bindings for panning via mouse
362	bind $itk_component(view) <ButtonPress-2> \
363	[itcl::code $this Pan click %x %y]
364	bind $itk_component(view) <B2-Motion> \
365	[itcl::code $this Pan drag %x %y]
366	bind $itk_component(view) <ButtonRelease-2> \
367	[itcl::code $this Pan release %x %y]
368
369	#bind $itk_component(view) <ButtonRelease-3> \
370	# [itcl::code $this Pick %x %y]
371
372	# Bindings for panning via keyboard
373	bind $itk_component(view) <KeyPress-Left> \
374	[itcl::code $this Pan set -10 0]
375	bind $itk_component(view) <KeyPress-Right> \
376	[itcl::code $this Pan set 10 0]
377	bind $itk_component(view) <KeyPress-Up> \
378	[itcl::code $this Pan set 0 -10]
379	bind $itk_component(view) <KeyPress-Down> \
380	[itcl::code $this Pan set 0 10]
381	bind $itk_component(view) <Shift-KeyPress-Left> \
382	[itcl::code $this Pan set -2 0]
383	bind $itk_component(view) <Shift-KeyPress-Right> \
384	[itcl::code $this Pan set 2 0]
385	bind $itk_component(view) <Shift-KeyPress-Up> \
386	[itcl::code $this Pan set 0 -2]
387	bind $itk_component(view) <Shift-KeyPress-Down> \
388	[itcl::code $this Pan set 0 2]
389
390	# Bindings for zoom via keyboard
391	bind $itk_component(view) <KeyPress-Prior> \
392	[itcl::code $this Zoom out]
393	bind $itk_component(view) <KeyPress-Next> \
394	[itcl::code $this Zoom in]
395
396	bind $itk_component(view) <Enter> "focus $itk_component(view)"
397
398	if {[string equal "x11" [tk windowingsystem]]} {
399	# Bindings for zoom via mouse
400	bind $itk_component(view) <4> [itcl::code $this Zoom out]
401	bind $itk_component(view) <5> [itcl::code $this Zoom in]
402	}
403
404	set _image(download) [image create photo]
405
406	eval itk_initialize $args
407
408	EnableWaitDialog 900
409	Connect
410	}
411
412	# ----------------------------------------------------------------------
413	# DESTRUCTOR
414	# ----------------------------------------------------------------------
415	itcl::body Rappture::VtkSurfaceViewer::destructor {} {
416	Disconnect
417	image delete $_image(plot)
418	image delete $_image(download)
419	catch { blt::arcball destroy $_arcball }
420	}
421
422	itcl::body Rappture::VtkSurfaceViewer::DoResize {} {
423	if { $_width < 2 } {
424	set _width 500
425	}
426	if { $_height < 2 } {
427	set _height 500
428	}
429	set _start [clock clicks -milliseconds]
430	SendCmd "screen size $_width $_height"
431
432	EventuallyRequestLegend
433	set _resizePending 0
434	}
435
436	itcl::body Rappture::VtkSurfaceViewer::DoRotate {} {
437	SendCmd "camera orient [ViewToQuaternion]"
438	set _rotatePending 0
439	}
440
441	itcl::body Rappture::VtkSurfaceViewer::EventuallyRequestLegend {} {
442	if { !$_legendPending } {
443	set _legendPending 1
444	$_dispatcher event -idle !legend
445	}
446	}
447
448	itcl::body Rappture::VtkSurfaceViewer::EventuallyResize { w h } {
449	set _width $w
450	set _height $h
451	$_arcball resize $w $h
452	if { !$_resizePending } {
453	set _resizePending 1
454	$_dispatcher event -after 400 !resize
455	}
456	}
457
458	set rotate_delay 100
459
460	itcl::body Rappture::VtkSurfaceViewer::EventuallyRotate { q } {
461	QuaternionToView $q
462	if { !$_rotatePending } {
463	set _rotatePending 1
464	global rotate_delay
465	$_dispatcher event -after $rotate_delay !rotate
466	}
467	}
468
469	# ----------------------------------------------------------------------
470	# USAGE: add <dataobj> ?<settings>?
471	#
472	# Clients use this to add a data object to the plot. The optional
473	# <settings> are used to configure the plot. Allowed settings are
474	# -color, -brightness, -width, -linestyle, and -raise.
475	# ----------------------------------------------------------------------
476	itcl::body Rappture::VtkSurfaceViewer::add {dataobj {settings ""}} {
477	if { ![$dataobj isvalid] } {
478	return; # Object doesn't contain valid data.
479	}
480	array set params {
481	-color auto
482	-width 1
483	-linestyle solid
484	-brightness 0
485	-raise 0
486	-description ""
487	-param ""
488	-type ""
489	}
490	array set params $settings
491	set params(-description) ""
492	set params(-param) ""
493	array set params $settings
494
495	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
496	# can't handle -autocolors yet
497	set params(-color) black
498	}
499	set pos [lsearch -exact $_dlist $dataobj]
500	if {$pos < 0} {
501	lappend _dlist $dataobj
502	}
503	set _obj2ovride($dataobj-color) $params(-color)
504	set _obj2ovride($dataobj-width) $params(-width)
505	set _obj2ovride($dataobj-raise) $params(-raise)
506	$_dispatcher event -idle !rebuild
507	}
508
509	# ----------------------------------------------------------------------
510	# USAGE: delete ?<dataobj1> <dataobj2> ...?
511	#
512	# Clients use this to delete a dataobj from the plot. If no dataobjs
513	# are specified, then all dataobjs are deleted. No data objects are
514	# deleted. They are only removed from the display list.
515	#
516	# ----------------------------------------------------------------------
517	itcl::body Rappture::VtkSurfaceViewer::delete {args} {
518	if { [llength $args] == 0} {
519	set args $_dlist
520	}
521	# Delete all specified dataobjs
522	set changed 0
523	foreach dataobj $args {
524	set pos [lsearch -exact $_dlist $dataobj]
525	if { $pos < 0 } {
526	continue; # Don't know anything about it.
527	}
528	# Remove it from the dataobj list.
529	set _dlist [lreplace $_dlist $pos $pos]
530	array unset _obj2ovride $dataobj-*
531	array unset _settings $dataobj-*
532	set changed 1
533	}
534	# If anything changed, then rebuild the plot
535	if { $changed } {
536	$_dispatcher event -idle !rebuild
537	}
538	}
539
540	# ----------------------------------------------------------------------
541	# USAGE: get ?-objects?
542	# USAGE: get ?-visible?
543	# USAGE: get ?-image view?
544	#
545	# Clients use this to query the list of objects being plotted, in
546	# order from bottom to top of this result. The optional "-image"
547	# flag can also request the internal images being shown.
548	# ----------------------------------------------------------------------
549	itcl::body Rappture::VtkSurfaceViewer::get {args} {
550	if {[llength $args] == 0} {
551	set args "-objects"
552	}
553
554	set op [lindex $args 0]
555	switch -- $op {
556	"-objects" {
557	# put the dataobj list in order according to -raise options
558	set dlist {}
559	foreach dataobj $_dlist {
560	if { ![IsValidObject $dataobj] } {
561	continue
562	}
563	if {[info exists _obj2ovride($dataobj-raise)] &&
564	$_obj2ovride($dataobj-raise)} {
565	set dlist [linsert $dlist 0 $dataobj]
566	} else {
567	lappend dlist $dataobj
568	}
569	}
570	return $dlist
571	}
572	"-visible" {
573	set dlist {}
574	foreach dataobj $_dlist {
575	if { ![IsValidObject $dataobj] } {
576	continue
577	}
578	if { ![info exists _obj2ovride($dataobj-raise)] } {
579	# No setting indicates that the object isn't visible.
580	continue
581	}
582	# Otherwise use the -raise parameter to put the object to
583	# the front of the list.
584	if { $_obj2ovride($dataobj-raise) } {
585	set dlist [linsert $dlist 0 $dataobj]
586	} else {
587	lappend dlist $dataobj
588	}
589	}
590	return $dlist
591	}
592	-image {
593	if {[llength $args] != 2} {
594	error "wrong # args: should be \"get -image view\""
595	}
596	switch -- [lindex $args end] {
597	view {
598	return $_image(plot)
599	}
600	default {
601	error "bad image name \"[lindex $args end]\": should be view"
602	}
603	}
604	}
605	default {
606	error "bad option \"$op\": should be -objects or -image"
607	}
608	}
609	}
610
611	# ----------------------------------------------------------------------
612	# USAGE: scale ?<data1> <data2> ...?
613	#
614	# Sets the default limits for the overall plot according to the
615	# limits of the data for all of the given <data> objects. This
616	# accounts for all objects--even those not showing on the screen.
617	# Because of this, the limits are appropriate for all objects as
618	# the user scans through data in the ResultSet viewer.
619	# ----------------------------------------------------------------------
620	itcl::body Rappture::VtkSurfaceViewer::scale { args } {
621	foreach dataobj $args {
622	if { ![$dataobj isvalid] } {
623	continue; # Object doesn't contain valid data.
624	}
625	foreach axis { x y z } {
626	set lim [$dataobj limits $axis]
627	if { ![info exists _limits($axis)] } {
628	set _limits($axis) $lim
629	continue
630	}
631	foreach {min max} $lim break
632	foreach {amin amax} $_limits($axis) break
633	if { $amin > $min } {
634	set amin $min
635	}
636	if { $amax < $max } {
637	set amax $max
638	}
639	set _limits($axis) [list $amin $amax]
640	}
641	foreach { fname lim } [$dataobj fieldlimits] {
642	if { ![info exists _limits($fname)] } {
643	set _limits($fname) $lim
644	continue
645	}
646	foreach {min max} $lim break
647	foreach {fmin fmax} $_limits($fname) break
648	if { $fmin > $min } {
649	set fmin $min
650	}
651	if { $fmax < $max } {
652	set fmax $max
653	}
654	set _limits($fname) [list $fmin $fmax]
655	}
656	}
657	}
658
659	# ----------------------------------------------------------------------
660	# USAGE: download coming
661	# USAGE: download controls <downloadCommand>
662	# USAGE: download now
663	#
664	# Clients use this method to create a downloadable representation
665	# of the plot. Returns a list of the form {ext string}, where
666	# "ext" is the file extension (indicating the type of data) and
667	# "string" is the data itself.
668	# ----------------------------------------------------------------------
669	itcl::body Rappture::VtkSurfaceViewer::download {option args} {
670	switch $option {
671	coming {
672	if {[catch {
673	blt::winop snap $itk_component(plotarea) $_image(download)
674	}]} {
675	$_image(download) configure -width 1 -height 1
676	$_image(download) put #000000
677	}
678	}
679	controls {
680	set popup .vtkviewerdownload
681	if { ![winfo exists .vtkviewerdownload] } {
682	set inner [BuildDownloadPopup $popup [lindex $args 0]]
683	} else {
684	set inner [$popup component inner]
685	}
686	set _downloadPopup(image_controls) $inner.image_frame
687	set num [llength [get]]
688	set num [expr {($num == 1) ? "1 result" : "$num results"}]
689	set word [Rappture::filexfer::label downloadWord]
690	$inner.summary configure -text "$word $num in the following format:"
691	update idletasks ;# Fix initial sizes
692	return $popup
693	}
694	now {
695	set popup .vtkviewerdownload
696	if {[winfo exists .vtkviewerdownload]} {
697	$popup deactivate
698	}
699	switch -- $_downloadPopup(format) {
700	"image" {
701	return [$this GetImage [lindex $args 0]]
702	}
703	"vtk" {
704	return [$this GetVtkData [lindex $args 0]]
705	}
706	}
707	return ""
708	}
709	default {
710	error "bad option \"$option\": should be coming, controls, now"
711	}
712	}
713	}
714
715	# ----------------------------------------------------------------------
716	# USAGE: Connect ?<host:port>,<host:port>...?
717	#
718	# Clients use this method to establish a connection to a new
719	# server, or to reestablish a connection to the previous server.
720	# Any existing connection is automatically closed.
721	# ----------------------------------------------------------------------
722	itcl::body Rappture::VtkSurfaceViewer::Connect {} {
723	set _hosts [GetServerList "vtkvis"]
724	if { "" == $_hosts } {
725	return 0
726	}
727	set _reset 1
728	set result [VisViewer::Connect $_hosts]
729	if { $result } {
730	if { $_reportClientInfo } {
731	# Tell the server the viewer, hub, user and session.
732	# Do this immediately on connect before buffering any commands
733	global env
734
735	set info {}
736	set user "???"
737	if { [info exists env(USER)] } {
738	set user $env(USER)
739	}
740	set session "???"
741	if { [info exists env(SESSION)] } {
742	set session $env(SESSION)
743	}
744	lappend info "version" "$Rappture::version"
745	lappend info "build" "$Rappture::build"
746	lappend info "svnurl" "$Rappture::svnurl"
747	lappend info "installdir" "$Rappture::installdir"
748	lappend info "hub" [exec hostname]
749	lappend info "client" "vtksurfaceviewer"
750	lappend info "user" $user
751	lappend info "session" $session
752	SendCmd "clientinfo [list $info]"
753	}
754
755	set w [winfo width $itk_component(view)]
756	set h [winfo height $itk_component(view)]
757	EventuallyResize $w $h
758	}
759	return $result
760	}
761
762	#
763	# isconnected --
764	#
765	# Indicates if we are currently connected to the visualization server.
766	#
767	itcl::body Rappture::VtkSurfaceViewer::isconnected {} {
768	return [VisViewer::IsConnected]
769	}
770
771	#
772	# disconnect --
773	#
774	itcl::body Rappture::VtkSurfaceViewer::disconnect {} {
775	Disconnect
776	set _reset 1
777	}
778
779	#
780	# Disconnect --
781	#
782	# Clients use this method to disconnect from the current rendering
783	# server.
784	#
785	itcl::body Rappture::VtkSurfaceViewer::Disconnect {} {
786	VisViewer::Disconnect
787
788	$_dispatcher cancel !rebuild
789	$_dispatcher cancel !resize
790	$_dispatcher cancel !rotate
791	$_dispatcher cancel !legend
792	# disconnected -- no more data sitting on server
793	array unset _datasets
794	array unset _data
795	array unset _colormaps
796	array unset _dataset2style
797	array unset _obj2datasets
798	}
799
800	# ----------------------------------------------------------------------
801	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
802	#
803	# Invoked automatically whenever the "image" command comes in from
804	# the rendering server. Indicates that binary image data with the
805	# specified <size> will follow.
806	# ----------------------------------------------------------------------
807	itcl::body Rappture::VtkSurfaceViewer::ReceiveImage { args } {
808	array set info {
809	-token "???"
810	-bytes 0
811	-type image
812	}
813	array set info $args
814	set bytes [ReceiveBytes $info(-bytes)]
815	if { $info(-type) == "image" } {
816	if 0 {
817	set f [open "last.ppm" "w"]
818	fconfigure $f -encoding binary
819	puts -nonewline $f $bytes
820	close $f
821	}
822	$_image(plot) configure -data $bytes
823	#set time [clock seconds]
824	#set date [clock format $time]
825	#set w [image width $_image(plot)]
826	#set h [image height $_image(plot)]
827	#puts stderr "$date: received image ${w}x${h} image"
828	if { $_start > 0 } {
829	set finish [clock clicks -milliseconds]
830	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
831	set _start 0
832	}
833	} elseif { $info(type) == "print" } {
834	set tag $this-print-$info(-token)
835	set _hardcopy($tag) $bytes
836	}
837	}
838
839	#
840	# ReceiveDataset --
841	#
842	itcl::body Rappture::VtkSurfaceViewer::ReceiveDataset { args } {
843	if { ![isconnected] } {
844	return
845	}
846	set option [lindex $args 0]
847	switch -- $option {
848	"scalar" {
849	set option [lindex $args 1]
850	switch -- $option {
851	"world" {
852	foreach { x y z value tag } [lrange $args 2 end] break
853	}
854	"pixel" {
855	foreach { x y value tag } [lrange $args 2 end] break
856	}
857	}
858	}
859	"vector" {
860	set option [lindex $args 1]
861	switch -- $option {
862	"world" {
863	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
864	}
865	"pixel" {
866	foreach { x y vx vy vz tag } [lrange $args 2 end] break
867	}
868	}
869	}
870	"names" {
871	foreach { name } [lindex $args 1] {
872	#puts stderr "Dataset: $name"
873	}
874	}
875	default {
876	error "unknown dataset option \"$option\" from server"
877	}
878	}
879	}
880
881	# ----------------------------------------------------------------------
882	# USAGE: Rebuild
883	#
884	# Called automatically whenever something changes that affects the
885	# data in the widget. Clears any existing data and rebuilds the
886	# widget to display new data.
887	# ----------------------------------------------------------------------
888	itcl::body Rappture::VtkSurfaceViewer::Rebuild {} {
889	set w [winfo width $itk_component(view)]
890	set h [winfo height $itk_component(view)]
891	if { $w < 2 \|\| $h < 2 } {
892	update
893	$_dispatcher event -idle !rebuild
894	return
895	}
896
897	# Turn on buffering of commands to the server. We don't want to
898	# be preempted by a server disconnect/reconnect (which automatically
899	# generates a new call to Rebuild).
900	StartBufferingCommands
901
902	if { $_reset } {
903	set _width $w
904	set _height $h
905	$_arcball resize $w $h
906	DoResize
907	# Reset the camera and other view parameters
908	$_arcball quaternion [ViewToQuaternion]
909	if {$_view(-ortho)} {
910	SendCmd "camera mode ortho"
911	} else {
912	SendCmd "camera mode persp"
913	}
914	DoRotate
915	PanCamera
916	set _first ""
917	InitSettings -xgrid -ygrid -zgrid -axismode \
918	-axesvisible -axislabels -axisminorticks
919	#SendCmd "axis lformat all %g"
920	StopBufferingCommands
921	SendCmd "imgflush"
922	StartBufferingCommands
923	}
924	set _first ""
925	SendCmd "dataset visible 0"
926	foreach dataobj [get -objects] {
927	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
928	set _first $dataobj
929	}
930	set _obj2datasets($dataobj) ""
931	foreach comp [$dataobj components] {
932	set tag $dataobj-$comp
933	if { ![info exists _datasets($tag)] } {
934	set bytes [$dataobj vtkdata $comp]
935	if 0 {
936	set f [open "/tmp/surface.vtk" "w"]
937	fconfigure $f -translation binary -encoding binary
938	puts -nonewline $f $bytes
939	close $f
940	}
941	set length [string length $bytes]
942	if { $_reportClientInfo } {
943	set info {}
944	lappend info "tool_id" [$dataobj hints toolid]
945	lappend info "tool_name" [$dataobj hints toolname]
946	lappend info "tool_title" [$dataobj hints tooltitle]
947	lappend info "tool_command" [$dataobj hints toolcommand]
948	lappend info "tool_revision" [$dataobj hints toolrevision]
949	lappend info "dataset_label" [$dataobj hints label]
950	lappend info "dataset_size" $length
951	lappend info "dataset_tag" $tag
952	SendCmd "clientinfo [list $info]"
953	}
954	SendCmd "dataset add $tag data follows $length"
955	SendData $bytes
956	set _datasets($tag) 1
957	SetObjectStyle $dataobj $comp
958	}
959	lappend _obj2datasets($dataobj) $tag
960	if { [info exists _obj2ovride($dataobj-raise)] } {
961	SendCmd "polydata visible 1 $tag"
962	}
963	}
964	}
965
966	if { $_first != "" } {
967	$itk_component(field) choices delete 0 end
968	$itk_component(fieldmenu) delete 0 end
969	array unset _fields
970	set _curFldName ""
971	foreach cname [$_first components] {
972	foreach fname [$_first fieldnames $cname] {
973	if { [info exists _fields($fname)] } {
974	continue
975	}
976	foreach { label units components } \
977	[$_first fieldinfo $fname] break
978	$itk_component(field) choices insert end "$fname" "$label"
979	$itk_component(fieldmenu) add radiobutton -label "$label" \
980	-value $label -variable [itcl::scope _curFldLabel] \
981	-selectcolor red \
982	-activebackground $itk_option(-plotbackground) \
983	-activeforeground $itk_option(-plotforeground) \
984	-font "Arial 8" \
985	-command [itcl::code $this Combo invoke]
986	set _fields($fname) [list $label $units $components]
987	if { $_curFldName == "" } {
988	set _curFldName $fname
989	set _curFldLabel $label
990	}
991	}
992	}
993	$itk_component(field) value $_curFldLabel
994	}
995	InitSettings -isolinesvisible -surfacevisible -outline
996	if { $_reset } {
997	# These are settings that rely on a dataset being loaded.
998	InitSettings \
999	-surfacelighting \
1000	-field \
1001	-surfaceedges -surfacelighting -surfaceopacity \
1002	-surfacewireframe \
1003	-numcontours
1004
1005	Zoom reset
1006	foreach axis { x y z } {
1007	set label ""
1008	if { $_first != "" } {
1009	set label [$_first hints ${axis}label]
1010	}
1011	if { $label == "" } {
1012	set label [string toupper $axis]
1013	}
1014	# May be a space in the axis label.
1015	SendCmd [list axis name $axis $label]
1016	}
1017	if { [array size _fields] < 2 } {
1018	catch {blt::table forget $itk_component(field) $itk_component(field_l)}
1019	}
1020	set _reset 0
1021	}
1022
1023	# Actually write the commands to the server socket. If it fails, we don't
1024	# care. We're finished here.
1025	blt::busy hold $itk_component(hull)
1026	StopBufferingCommands; # Turn off buffering and send commands.
1027	blt::busy release $itk_component(hull)
1028	}
1029
1030	# ----------------------------------------------------------------------
1031	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1032	#
1033	# Returns a list of server IDs for the current datasets being displayed. This
1034	# is normally a single ID, but it might be a list of IDs if the current data
1035	# object has multiple components.
1036	# ----------------------------------------------------------------------
1037	itcl::body Rappture::VtkSurfaceViewer::CurrentDatasets {args} {
1038	set flag [lindex $args 0]
1039	switch -- $flag {
1040	"-all" {
1041	if { [llength $args] > 1 } {
1042	error "CurrentDatasets: can't specify dataobj after \"-all\""
1043	}
1044	set dlist [get -objects]
1045	}
1046	"-visible" {
1047	if { [llength $args] > 1 } {
1048	set dlist {}
1049	set args [lrange $args 1 end]
1050	foreach dataobj $args {
1051	if { [info exists _obj2ovride($dataobj-raise)] } {
1052	lappend dlist $dataobj
1053	}
1054	}
1055	} else {
1056	set dlist [get -visible]
1057	}
1058	}
1059	default {
1060	set dlist $args
1061	}
1062	}
1063	set rlist ""
1064	foreach dataobj $dlist {
1065	foreach comp [$dataobj components] {
1066	set tag $dataobj-$comp
1067	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1068	lappend rlist $tag
1069	}
1070	}
1071	}
1072	return $rlist
1073	}
1074
1075	# ----------------------------------------------------------------------
1076	# USAGE: Zoom in
1077	# USAGE: Zoom out
1078	# USAGE: Zoom reset
1079	#
1080	# Called automatically when the user clicks on one of the zoom
1081	# controls for this widget. Changes the zoom for the current view.
1082	# ----------------------------------------------------------------------
1083	itcl::body Rappture::VtkSurfaceViewer::Zoom {option} {
1084	switch -- $option {
1085	"in" {
1086	set _view(-zoom) [expr {$_view(-zoom)*1.25}]
1087	SendCmd "camera zoom $_view(-zoom)"
1088	}
1089	"out" {
1090	set _view(-zoom) [expr {$_view(-zoom)*0.8}]
1091	SendCmd "camera zoom $_view(-zoom)"
1092	}
1093	"reset" {
1094	array set _view {
1095	-qw 0.853553
1096	-qx -0.353553
1097	-qy 0.353553
1098	-qz 0.146447
1099	-xpan 0
1100	-ypan 0
1101	-zoom 1.0
1102	}
1103	if { $_first != "" } {
1104	set location [$_first hints camera]
1105	if { $location != "" } {
1106	array set _view $location
1107	}
1108	}
1109	$_arcball quaternion [ViewToQuaternion]
1110	DoRotate
1111	SendCmd "camera reset"
1112	}
1113	}
1114	}
1115
1116	itcl::body Rappture::VtkSurfaceViewer::PanCamera {} {
1117	set x $_view(-xpan)
1118	set y $_view(-ypan)
1119	SendCmd "camera pan $x $y"
1120	}
1121
1122	# ----------------------------------------------------------------------
1123	# USAGE: Rotate click <x> <y>
1124	# USAGE: Rotate drag <x> <y>
1125	# USAGE: Rotate release <x> <y>
1126	#
1127	# Called automatically when the user clicks/drags/releases in the
1128	# plot area. Moves the plot according to the user's actions.
1129	# ----------------------------------------------------------------------
1130	itcl::body Rappture::VtkSurfaceViewer::Rotate {option x y} {
1131	switch -- $option {
1132	"click" {
1133	$itk_component(view) configure -cursor fleur
1134	set _click(x) $x
1135	set _click(y) $y
1136	}
1137	"drag" {
1138	if {[array size _click] == 0} {
1139	Rotate click $x $y
1140	} else {
1141	set w [winfo width $itk_component(view)]
1142	set h [winfo height $itk_component(view)]
1143	if {$w <= 0 \|\| $h <= 0} {
1144	return
1145	}
1146
1147	if {[catch {
1148	# this fails sometimes for no apparent reason
1149	set dx [expr {double($x-$_click(x))/$w}]
1150	set dy [expr {double($y-$_click(y))/$h}]
1151	}]} {
1152	return
1153	}
1154	if { $dx == 0 && $dy == 0 } {
1155	return
1156	}
1157	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1158	EventuallyRotate $q
1159	set _click(x) $x
1160	set _click(y) $y
1161	}
1162	}
1163	"release" {
1164	Rotate drag $x $y
1165	$itk_component(view) configure -cursor ""
1166	catch {unset _click}
1167	}
1168	default {
1169	error "bad option \"$option\": should be click, drag, release"
1170	}
1171	}
1172	}
1173
1174	itcl::body Rappture::VtkSurfaceViewer::Pick {x y} {
1175	foreach tag [CurrentDatasets -visible] {
1176	SendCmd "dataset getscalar pixel $x $y $tag"
1177	}
1178	}
1179
1180	# ----------------------------------------------------------------------
1181	# USAGE: $this Pan click x y
1182	# $this Pan drag x y
1183	# $this Pan release x y
1184	#
1185	# Called automatically when the user clicks on one of the zoom
1186	# controls for this widget. Changes the zoom for the current view.
1187	# ----------------------------------------------------------------------
1188	itcl::body Rappture::VtkSurfaceViewer::Pan {option x y} {
1189	switch -- $option {
1190	"set" {
1191	set w [winfo width $itk_component(view)]
1192	set h [winfo height $itk_component(view)]
1193	set x [expr $x / double($w)]
1194	set y [expr $y / double($h)]
1195	set _view(-xpan) [expr $_view(-xpan) + $x]
1196	set _view(-ypan) [expr $_view(-ypan) + $y]
1197	PanCamera
1198	return
1199	}
1200	"click" {
1201	set _click(x) $x
1202	set _click(y) $y
1203	$itk_component(view) configure -cursor hand1
1204	}
1205	"drag" {
1206	if { ![info exists _click(x)] } {
1207	set _click(x) $x
1208	}
1209	if { ![info exists _click(y)] } {
1210	set _click(y) $y
1211	}
1212	set w [winfo width $itk_component(view)]
1213	set h [winfo height $itk_component(view)]
1214	set dx [expr ($_click(x) - $x)/double($w)]
1215	set dy [expr ($_click(y) - $y)/double($h)]
1216	set _click(x) $x
1217	set _click(y) $y
1218	set _view(-xpan) [expr $_view(-xpan) - $dx]
1219	set _view(-ypan) [expr $_view(-ypan) - $dy]
1220	PanCamera
1221	}
1222	"release" {
1223	Pan drag $x $y
1224	$itk_component(view) configure -cursor ""
1225	}
1226	default {
1227	error "unknown option \"$option\": should set, click, drag, or release"
1228	}
1229	}
1230	}
1231
1232	# ----------------------------------------------------------------------
1233	# USAGE: InitSettings <what> ?<value>?
1234	#
1235	# Used internally to update rendering settings whenever parameters
1236	# change in the popup settings panel. Sends the new settings off
1237	# to the back end.
1238	# ----------------------------------------------------------------------
1239	itcl::body Rappture::VtkSurfaceViewer::InitSettings { args } {
1240	foreach spec $args {
1241	if { [info exists _settings($_first-$spec)] } {
1242	# Reset global setting with dataobj specific setting
1243	set _settings($spec) $_settings($_first-$spec)
1244	}
1245	AdjustSetting $spec
1246	}
1247	}
1248
1249	#
1250	# AdjustSetting --
1251	#
1252	# Changes/updates a specific setting in the widget. There are
1253	# usually user-setable option. Commands are sent to the render
1254	# server.
1255	#
1256	itcl::body Rappture::VtkSurfaceViewer::AdjustSetting {what {value ""}} {
1257	if { ![isconnected] } {
1258	return
1259	}
1260	switch -- $what {
1261	"-axesvisible" {
1262	set bool $_settings($what)
1263	SendCmd "axis visible all $bool"
1264	}
1265	"-axislabels" {
1266	set bool $_settings($what)
1267	SendCmd "axis labels all $bool"
1268	}
1269	"-axisminorticks" {
1270	set bool $_settings($what)
1271	SendCmd "axis minticks all $bool"
1272	}
1273	"-axismode" {
1274	set mode [$itk_component(axisMode) value]
1275	set mode [$itk_component(axisMode) translate $mode]
1276	set _settings($what) $mode
1277	SendCmd "axis flymode $mode"
1278	}
1279	"-background" {
1280	set bgcolor [$itk_component(background) value]
1281	array set fgcolors {
1282	"black" "white"
1283	"white" "black"
1284	"grey" "black"
1285	}
1286	configure -plotbackground $bgcolor \
1287	-plotforeground $fgcolors($bgcolor)
1288	$itk_component(view) delete "legend"
1289	DrawLegend
1290	}
1291	"-colormap" {
1292	set _changed($what) 1
1293	StartBufferingCommands
1294	set color [$itk_component(colormap) value]
1295	set _settings($what) $color
1296	if { $color == "none" } {
1297	if { $_settings(-colormapvisible) } {
1298	SendCmd "contour2d colormode constant {}"
1299	SendCmd "polydata colormode constant {}"
1300	set _settings(-colormapvisible) 0
1301	}
1302	} else {
1303	if { !$_settings(-colormapvisible) } {
1304	#SendCmd "contour2d colormode $_colorMode $_curFldName"
1305	SendCmd "polydata colormode $_colorMode $_curFldName"
1306	set _settings(-colormapvisible) 1
1307	}
1308	SetCurrentColormap $color
1309	if {$_settings(-colormapdiscrete)} {
1310	set numColors [expr $_settings(-numcontours) + 1]
1311	SendCmd "colormap res $numColors $color"
1312	}
1313	}
1314	StopBufferingCommands
1315	EventuallyRequestLegend
1316	}
1317	"-colormapdiscrete" {
1318	set bool $_settings($what)
1319	set numColors [expr $_settings(-numcontours) + 1]
1320	StartBufferingCommands
1321	if {$bool} {
1322	SendCmd "colormap res $numColors"
1323	# Discrete colormap requires preinterp on
1324	SendCmd "polydata preinterp on"
1325	} else {
1326	SendCmd "colormap res default"
1327	# FIXME: add setting for preinterp (default on)
1328	SendCmd "polydata preinterp on"
1329	}
1330	StopBufferingCommands
1331	EventuallyRequestLegend
1332	}
1333	"-field" {
1334	set label [$itk_component(field) value]
1335	set fname [$itk_component(field) translate $label]
1336	set _settings($what) $fname
1337	if { [info exists _fields($fname)] } {
1338	foreach { label units components } $_fields($fname) break
1339	if { $components > 1 } {
1340	set _colorMode vmag
1341	} else {
1342	set _colorMode scalar
1343	}
1344	set _curFldName $fname
1345	set _curFldLabel $label
1346	} else {
1347	puts stderr "unknown field \"$fname\""
1348	return
1349	}
1350	SendCmd "dataset scalar $_curFldName"
1351	if { ![info exists _limits($_curFldName)] } {
1352	SendCmd "dataset maprange all"
1353	} else {
1354	SendCmd "dataset maprange explicit $_limits($_curFldName) $_curFldName"
1355	}
1356	#SendCmd "contour2d colormode $_colorMode $_curFldName"
1357	SendCmd "polydata colormode $_colorMode $_curFldName"
1358	SendCmd "camera reset"
1359	UpdateContourList
1360	DrawLegend
1361	}
1362	"-isolinecolor" {
1363	set _changed($what) 1
1364	set color [$itk_component(isolineColor) value]
1365	set _settings($what) $color
1366	SendCmd "contour2d linecolor [Color2RGB $color]"
1367	DrawLegend
1368	}
1369	"-isolinesvisible" {
1370	set _changed($what) 1
1371	set bool $_settings($what)
1372	SendCmd "contour2d visible 0"
1373	if { $bool } {
1374	foreach tag [CurrentDatasets -visible] {
1375	SendCmd "contour2d visible $bool $tag"
1376	}
1377	}
1378	DrawLegend
1379	}
1380	"-legendvisible" {
1381	if { !$_settings($what) } {
1382	$itk_component(view) delete legend
1383	}
1384	DrawLegend
1385	}
1386	"-numcontours" {
1387	set _settings($what) [$itk_component(numcontours) value]
1388	set _currentNumContours $_settings($what)
1389	UpdateContourList
1390	set _changed($what) 1
1391	SendCmd "contour2d contourlist [list $_contourList]"
1392	if {$_settings(-colormapdiscrete)} {
1393	set numColors [expr $_settings($what) + 1]
1394	SendCmd "colormap res $numColors"
1395	EventuallyRequestLegend
1396	} else {
1397	DrawLegend
1398	}
1399	}
1400	"-outline" {
1401	set _changed($what) 1
1402	set bool $_settings($what)
1403	SendCmd "outline visible 0"
1404	if { $bool } {
1405	foreach tag [CurrentDatasets -visible] {
1406	SendCmd "outline visible $bool $tag"
1407	}
1408	}
1409	}
1410	"-surfaceedges" {
1411	set _changed($what) 1
1412	set bool $_settings($what)
1413	SendCmd "polydata edges $bool"
1414	}
1415	"-surfacelighting" {
1416	set _changed($what) 1
1417	set bool $_settings($what)
1418	SendCmd "polydata lighting $bool"
1419	}
1420	"-surfaceopacity" {
1421	set _changed($what) 1
1422	set val $_settings($what)
1423	set sval [expr { 0.01 * double($val) }]
1424	SendCmd "polydata opacity $sval"
1425	}
1426	"-surfacevisible" {
1427	set _changed($what) 1
1428	set bool $_settings($what)
1429	SendCmd "polydata visible 0"
1430	if { $bool } {
1431	foreach tag [CurrentDatasets -visible] {
1432	SendCmd "polydata visible $bool $tag"
1433	}
1434	Rappture::Tooltip::for $itk_component(surface) \
1435	"Hide the surface"
1436	} else {
1437	Rappture::Tooltip::for $itk_component(surface) \
1438	"Show the surface"
1439	}
1440	DrawLegend
1441	}
1442	"-surfacewireframe" {
1443	set _changed($what) 1
1444	set bool $_settings($what)
1445	SendCmd "polydata wireframe $bool"
1446	}
1447	"-xgrid" - "-ygrid" - "-zgrid" {
1448	set axis [string tolower [string range $what 1 1]]
1449	set bool $_settings($what)
1450	SendCmd "axis grid $axis $bool"
1451	}
1452	default {
1453	error "don't know how to fix $what"
1454	}
1455	}
1456	}
1457
1458	#
1459	# RequestLegend --
1460	#
1461	# Request a new legend from the server. The size of the legend
1462	# is determined from the height of the canvas.
1463	#
1464	# This should be called when
1465	# 1. A new current colormap is set.
1466	# 2. Window is resized.
1467	# 3. The limits of the data have changed. (Just need a redraw).
1468	# 4. Number of isolines have changed. (Just need a redraw).
1469	# 5. Legend becomes visible (Just need a redraw).
1470	#
1471	itcl::body Rappture::VtkSurfaceViewer::RequestLegend {} {
1472	set _legendPending 0
1473	if { ![info exists _fields($_curFldName)] } {
1474	return
1475	}
1476	set fname $_curFldName
1477	set font "Arial 8"
1478	set lineht [font metrics $font -linespace]
1479	set w 12
1480	set h [expr {$_height - 2 * ($lineht + 2)}]
1481	if { $h < 1 } {
1482	return
1483	}
1484	if { [string match "component*" $fname] } {
1485	set title ""
1486	} else {
1487	if { [info exists _fields($fname)] } {
1488	foreach { title units } $_fields($fname) break
1489	if { $units != "" } {
1490	set title [format "%s (%s)" $title $units]
1491	}
1492	} else {
1493	set title $fname
1494	}
1495	}
1496	# If there's a title too, subtract one more line
1497	if { $title != "" } {
1498	incr h -$lineht
1499	}
1500	# Set the legend on the first heightmap dataset.
1501	if { $_currentColormap != "" } {
1502	set cmap $_currentColormap
1503	if { ![info exists _colormaps($cmap)] } {
1504	BuildColormap $cmap
1505	set _colormaps($cmap) 1
1506	}
1507	#SendCmd "legend $cmap scalar $_curFldName {} $w $h 0"
1508	SendCmd "legend2 $cmap $w $h"
1509	}
1510	}
1511
1512	# ----------------------------------------------------------------------
1513	# CONFIGURATION OPTION: -plotbackground
1514	# ----------------------------------------------------------------------
1515	itcl::configbody Rappture::VtkSurfaceViewer::plotbackground {
1516	if { [isconnected] } {
1517	set rgb [Color2RGB $itk_option(-plotbackground)]
1518	SendCmd "screen bgcolor $rgb"
1519	}
1520	}
1521
1522	# ----------------------------------------------------------------------
1523	# CONFIGURATION OPTION: -plotforeground
1524	# ----------------------------------------------------------------------
1525	itcl::configbody Rappture::VtkSurfaceViewer::plotforeground {
1526	if { [isconnected] } {
1527	set rgb [Color2RGB $itk_option(-plotforeground)]
1528	SendCmd "axis color all $rgb"
1529	SendCmd "outline color $rgb"
1530	}
1531	}
1532
1533	itcl::body Rappture::VtkSurfaceViewer::BuildSurfaceTab {} {
1534
1535	set fg [option get $itk_component(hull) font Font]
1536	#set bfg [option get $itk_component(hull) boldFont Font]
1537
1538	set inner [$itk_component(main) insert end \
1539	-title "Surface Settings" \
1540	-icon [Rappture::icon volume-on]]
1541	$inner configure -borderwidth 4
1542
1543	checkbutton $inner.surface \
1544	-text "Surface" \
1545	-variable [itcl::scope _settings(-surfacevisible)] \
1546	-command [itcl::code $this AdjustSetting -surfacevisible] \
1547	-font "Arial 9"
1548
1549	checkbutton $inner.isolines \
1550	-text "Isolines" \
1551	-variable [itcl::scope _settings(-isolinesvisible)] \
1552	-command [itcl::code $this AdjustSetting -isolinesvisible] \
1553	-font "Arial 9"
1554
1555	checkbutton $inner.colormapDiscrete \
1556	-text "Discrete Colormap" \
1557	-variable [itcl::scope _settings(-colormapdiscrete)] \
1558	-command [itcl::code $this AdjustSetting -colormapdiscrete] \
1559	-font "Arial 9"
1560
1561	checkbutton $inner.wireframe \
1562	-text "Wireframe" \
1563	-variable [itcl::scope _settings(-surfacewireframe)] \
1564	-command [itcl::code $this AdjustSetting -surfacewireframe] \
1565	-font "Arial 9"
1566
1567	checkbutton $inner.lighting \
1568	-text "Enable Lighting" \
1569	-variable [itcl::scope _settings(-surfacelighting)] \
1570	-command [itcl::code $this AdjustSetting -surfacelighting] \
1571	-font "Arial 9"
1572
1573	checkbutton $inner.edges \
1574	-text "Edges" \
1575	-variable [itcl::scope _settings(-surfaceedges)] \
1576	-command [itcl::code $this AdjustSetting -surfaceedges] \
1577	-font "Arial 9"
1578
1579	checkbutton $inner.outline \
1580	-text "Outline" \
1581	-variable [itcl::scope _settings(-outline)] \
1582	-command [itcl::code $this AdjustSetting -outline] \
1583	-font "Arial 9"
1584
1585	checkbutton $inner.legend \
1586	-text "Legend" \
1587	-variable [itcl::scope _settings(-legendvisible)] \
1588	-command [itcl::code $this AdjustSetting -legendvisible] \
1589	-font "Arial 9"
1590
1591	label $inner.linecolor_l -text "Isolines" -font "Arial 9"
1592	itk_component add isolineColor {
1593	Rappture::Combobox $inner.linecolor -width 10 -editable 0
1594	}
1595	$inner.linecolor choices insert end \
1596	"black" "black" \
1597	"blue" "blue" \
1598	"cyan" "cyan" \
1599	"green" "green" \
1600	"grey" "grey" \
1601	"magenta" "magenta" \
1602	"orange" "orange" \
1603	"red" "red" \
1604	"white" "white" \
1605	"none" "none"
1606
1607	$itk_component(isolineColor) value "white"
1608	bind $inner.linecolor <<Value>> \
1609	[itcl::code $this AdjustSetting -isolinecolor]
1610
1611	label $inner.background_l -text "Background" -font "Arial 9"
1612	itk_component add background {
1613	Rappture::Combobox $inner.background -width 10 -editable 0
1614	}
1615	$inner.background choices insert end \
1616	"black" "black" \
1617	"white" "white" \
1618	"grey" "grey"
1619
1620	$itk_component(background) value $_settings(-background)
1621	bind $inner.background <<Value>> \
1622	[itcl::code $this AdjustSetting -background]
1623
1624	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1625	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1626	-variable [itcl::scope _settings(-surfaceopacity)] \
1627	-width 10 \
1628	-showvalue off \
1629	-command [itcl::code $this AdjustSetting -surfaceopacity]
1630
1631	itk_component add field_l {
1632	label $inner.field_l -text "Field" -font "Arial 9"
1633	} {
1634	ignore -font
1635	}
1636	itk_component add field {
1637	Rappture::Combobox $inner.field -width 10 -editable 0
1638	}
1639	bind $inner.field <<Value>> \
1640	[itcl::code $this AdjustSetting -field]
1641
1642	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1643	itk_component add colormap {
1644	Rappture::Combobox $inner.colormap -width 10 -editable 0
1645	}
1646	$inner.colormap choices insert end [GetColormapList]
1647
1648	$itk_component(colormap) value "BCGYR"
1649	bind $inner.colormap <<Value>> \
1650	[itcl::code $this AdjustSetting -colormap]
1651
1652	label $inner.numcontours_l -text "Number of Isolines" -font "Arial 9"
1653	itk_component add numcontours {
1654	Rappture::Spinint $inner.numcontours \
1655	-min 0 -max 50 -font "arial 9"
1656	}
1657	$itk_component(numcontours) value $_settings(-numcontours)
1658	bind $itk_component(numcontours) <<Value>> \
1659	[itcl::code $this AdjustSetting -numcontours]
1660
1661	blt::table $inner \
1662	0,0 $inner.field_l -anchor w -pady 2 \
1663	0,1 $inner.field -anchor w -pady 2 -fill x \
1664	1,0 $inner.colormap_l -anchor w -pady 2 \
1665	1,1 $inner.colormap -anchor w -pady 2 -fill x \
1666	2,0 $inner.linecolor_l -anchor w -pady 2 \
1667	2,1 $inner.linecolor -anchor w -pady 2 -fill x \
1668	3,0 $inner.background_l -anchor w -pady 2 \
1669	3,1 $inner.background -anchor w -pady 2 -fill x \
1670	4,0 $inner.numcontours_l -anchor w -pady 2 \
1671	4,1 $inner.numcontours -anchor w -pady 2 \
1672	5,0 $inner.colormapDiscrete -anchor w -pady 2 -cspan 2 \
1673	6,0 $inner.isolines -anchor w -pady 2 -cspan 2 \
1674	7,0 $inner.wireframe -anchor w -pady 2 -cspan 2 \
1675	8,0 $inner.lighting -anchor w -pady 2 -cspan 2 \
1676	9,0 $inner.edges -anchor w -pady 2 -cspan 2 \
1677	10,0 $inner.outline -anchor w -pady 2 -cspan 2 \
1678	11,0 $inner.legend -anchor w -pady 2 \
1679	12,0 $inner.opacity_l -anchor w -pady 2 \
1680	12,1 $inner.opacity -fill x -pady 2 -fill x \
1681
1682	blt::table configure $inner r* c* -resize none
1683	blt::table configure $inner r13 c1 -resize expand
1684	}
1685
1686	itcl::body Rappture::VtkSurfaceViewer::BuildAxisTab {} {
1687
1688	set fg [option get $itk_component(hull) font Font]
1689	#set bfg [option get $itk_component(hull) boldFont Font]
1690
1691	set inner [$itk_component(main) insert end \
1692	-title "Axis Settings" \
1693	-icon [Rappture::icon axis2]]
1694	$inner configure -borderwidth 4
1695
1696	checkbutton $inner.visible \
1697	-text "Axes" \
1698	-variable [itcl::scope _settings(-axesvisible)] \
1699	-command [itcl::code $this AdjustSetting -axesvisible] \
1700	-font "Arial 9"
1701
1702	checkbutton $inner.labels \
1703	-text "Axis Labels" \
1704	-variable [itcl::scope _settings(-axislabels)] \
1705	-command [itcl::code $this AdjustSetting -axislabels] \
1706	-font "Arial 9"
1707	label $inner.grid_l -text "Grid" -font "Arial 9"
1708	checkbutton $inner.xgrid \
1709	-text "X" \
1710	-variable [itcl::scope _settings(-xgrid)] \
1711	-command [itcl::code $this AdjustSetting -xgrid] \
1712	-font "Arial 9"
1713	checkbutton $inner.ygrid \
1714	-text "Y" \
1715	-variable [itcl::scope _settings(-ygrid)] \
1716	-command [itcl::code $this AdjustSetting -ygrid] \
1717	-font "Arial 9"
1718	checkbutton $inner.zgrid \
1719	-text "Z" \
1720	-variable [itcl::scope _settings(-zgrid)] \
1721	-command [itcl::code $this AdjustSetting -zgrid] \
1722	-font "Arial 9"
1723	checkbutton $inner.minorticks \
1724	-text "Minor Ticks" \
1725	-variable [itcl::scope _settings(-axisminorticks)] \
1726	-command [itcl::code $this AdjustSetting -axisminorticks] \
1727	-font "Arial 9"
1728
1729	label $inner.mode_l -text "Mode" -font "Arial 9"
1730
1731	itk_component add axisMode {
1732	Rappture::Combobox $inner.mode -width 10 -editable 0
1733	}
1734	$inner.mode choices insert end \
1735	"static_triad" "static" \
1736	"closest_triad" "closest" \
1737	"furthest_triad" "farthest" \
1738	"outer_edges" "outer"
1739	$itk_component(axisMode) value $_settings(-axismode)
1740	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting -axismode]
1741
1742	blt::table $inner \
1743	0,0 $inner.visible -anchor w -cspan 4 \
1744	1,0 $inner.labels -anchor w -cspan 4 \
1745	2,0 $inner.minorticks -anchor w -cspan 4 \
1746	4,0 $inner.grid_l -anchor w \
1747	4,1 $inner.xgrid -anchor w \
1748	4,2 $inner.ygrid -anchor w \
1749	4,3 $inner.zgrid -anchor w \
1750	5,0 $inner.mode_l -anchor w -padx { 2 0 } \
1751	5,1 $inner.mode -fill x -cspan 3
1752
1753	blt::table configure $inner r* c* -resize none
1754	blt::table configure $inner r7 c6 -resize expand
1755	blt::table configure $inner r3 -height 0.125i
1756	}
1757
1758	itcl::body Rappture::VtkSurfaceViewer::BuildCameraTab {} {
1759	set inner [$itk_component(main) insert end \
1760	-title "Camera Settings" \
1761	-icon [Rappture::icon camera]]
1762	$inner configure -borderwidth 4
1763
1764	label $inner.view_l -text "view" -font "Arial 9"
1765	set f [frame $inner.view]
1766	foreach side { front back left right top bottom } {
1767	button $f.$side -image [Rappture::icon view$side] \
1768	-command [itcl::code $this SetOrientation $side]
1769	Rappture::Tooltip::for $f.$side "Change the view to $side"
1770	pack $f.$side -side left
1771	}
1772
1773	blt::table $inner \
1774	0,0 $inner.view_l -anchor e -pady 2 \
1775	0,1 $inner.view -anchor w -pady 2
1776	blt::table configure $inner r0 -resize none
1777
1778	set labels { qx qy qz qw xpan ypan zoom }
1779	set row 1
1780	foreach tag $labels {
1781	label $inner.${tag}label -text $tag -font "Arial 9"
1782	entry $inner.${tag} -font "Arial 9" -bg white \
1783	-textvariable [itcl::scope _view(-$tag)]
1784	bind $inner.${tag} <Return> \
1785	[itcl::code $this camera set -${tag}]
1786	bind $inner.${tag} <KP_Enter> \
1787	[itcl::code $this camera set -${tag}]
1788	blt::table $inner \
1789	$row,0 $inner.${tag}label -anchor e -pady 2 \
1790	$row,1 $inner.${tag} -anchor w -pady 2
1791	blt::table configure $inner r$row -resize none
1792	incr row
1793	}
1794	checkbutton $inner.ortho \
1795	-text "Orthographic Projection" \
1796	-variable [itcl::scope _view(-ortho)] \
1797	-command [itcl::code $this camera set -ortho] \
1798	-font "Arial 9"
1799	blt::table $inner \
1800	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1801	blt::table configure $inner r$row -resize none
1802	incr row
1803
1804	blt::table configure $inner c* -resize none
1805	blt::table configure $inner c2 -resize expand
1806	blt::table configure $inner r$row -resize expand
1807	}
1808
1809	#
1810	# camera --
1811	#
1812	itcl::body Rappture::VtkSurfaceViewer::camera {option args} {
1813	switch -- $option {
1814	"show" {
1815	puts [array get _view]
1816	}
1817	"set" {
1818	set what [lindex $args 0]
1819	set x $_view($what)
1820	set code [catch { string is double $x } result]
1821	if { $code != 0 \|\| !$result } {
1822	return
1823	}
1824	switch -- $what {
1825	"-ortho" {
1826	if {$_view($what)} {
1827	SendCmd "camera mode ortho"
1828	} else {
1829	SendCmd "camera mode persp"
1830	}
1831	}
1832	"-xpan" - "-ypan" {
1833	PanCamera
1834	}
1835	"-qx" - "-qy" - "-qz" - "-qw" {
1836	set q [ViewToQuaternion]
1837	$_arcball quaternion $q
1838	EventuallyRotate $q
1839	}
1840	"-zoom" {
1841	SendCmd "camera zoom $_view($what)"
1842	}
1843	}
1844	}
1845	}
1846	}
1847
1848	itcl::body Rappture::VtkSurfaceViewer::GetVtkData { args } {
1849	set bytes ""
1850	foreach dataobj [get] {
1851	foreach cname [$dataobj components] {
1852	set tag $dataobj-$cname
1853	set contents [$dataobj vtkdata $cname]
1854	append bytes "$contents\n"
1855	}
1856	}
1857	return [list .vtk $bytes]
1858	}
1859
1860	itcl::body Rappture::VtkSurfaceViewer::GetImage { args } {
1861	if { [image width $_image(download)] > 0 &&
1862	[image height $_image(download)] > 0 } {
1863	set bytes [$_image(download) data -format "jpeg -quality 100"]
1864	set bytes [Rappture::encoding::decode -as b64 $bytes]
1865	return [list .jpg $bytes]
1866	}
1867	return ""
1868	}
1869
1870	itcl::body Rappture::VtkSurfaceViewer::BuildDownloadPopup { popup command } {
1871	Rappture::Balloon $popup \
1872	-title "[Rappture::filexfer::label downloadWord] as..."
1873	set inner [$popup component inner]
1874	label $inner.summary -text "" -anchor w
1875	radiobutton $inner.vtk_button -text "VTK data file" \
1876	-variable [itcl::scope _downloadPopup(format)] \
1877	-font "Arial 9 " \
1878	-value vtk
1879	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
1880	radiobutton $inner.image_button -text "Image File" \
1881	-variable [itcl::scope _downloadPopup(format)] \
1882	-font "Arial 9 " \
1883	-value image
1884	Rappture::Tooltip::for $inner.image_button \
1885	"Save as digital image."
1886
1887	button $inner.ok -text "Save" \
1888	-highlightthickness 0 -pady 2 -padx 3 \
1889	-command $command \
1890	-compound left \
1891	-image [Rappture::icon download]
1892
1893	button $inner.cancel -text "Cancel" \
1894	-highlightthickness 0 -pady 2 -padx 3 \
1895	-command [list $popup deactivate] \
1896	-compound left \
1897	-image [Rappture::icon cancel]
1898
1899	blt::table $inner \
1900	0,0 $inner.summary -cspan 2 \
1901	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
1902	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
1903	4,1 $inner.cancel -width .9i -fill y \
1904	4,0 $inner.ok -padx 2 -width .9i -fill y
1905	blt::table configure $inner r3 -height 4
1906	blt::table configure $inner r4 -pady 4
1907	raise $inner.image_button
1908	$inner.vtk_button invoke
1909	return $inner
1910	}
1911
1912	itcl::body Rappture::VtkSurfaceViewer::SetObjectStyle { dataobj comp } {
1913	# Parse style string.
1914	set tag $dataobj-$comp
1915	array set style {
1916	-color BCGYR
1917	-edgecolor black
1918	-edges 0
1919	-isolinecolor white
1920	-isolinesvisible 0
1921	-levels 10
1922	-lighting 1
1923	-linewidth 1.0
1924	-opacity 1.0
1925	-outline 0
1926	-surfacevisible 1
1927	-wireframe 0
1928	}
1929	array set style [$dataobj style $comp]
1930	if { $dataobj != $_first \|\| $style(-levels) == 1 } {
1931	set style(-opacity) 1.0
1932	}
1933
1934	# This is too complicated. We want to set the colormap, number of
1935	# isolines and opacity for the dataset. They can be the default values,
1936	# the style hints loaded with the dataset, or set by user controls. As
1937	# datasets get loaded, they first use the defaults that are overidden
1938	# by the style hints. If the user changes the global controls, then that
1939	# overrides everything else. I don't know what it means when global
1940	# controls are specified as style hints by each dataset. It complicates
1941	# the code to handle aberrant cases.
1942
1943	if { $_changed(-surfaceedges) } {
1944	set style(-edges) $_settings(-surfaceedges)
1945	}
1946	if { $_changed(-surfacelighting) } {
1947	set style(-lighting) $_settings(-surfacelighting)
1948	}
1949	if { $_changed(-surfaceopacity) } {
1950	set style(-opacity) [expr $_settings(-surfaceopacity) * 0.01]
1951	}
1952	if { $_changed(-surfacewireframe) } {
1953	set style(-wireframe) $_settings(-surfacewireframe)
1954	}
1955	if { $_changed(-numcontours) } {
1956	set style(-levels) $_settings(-numcontours)
1957	}
1958	if { $_changed(-colormap) } {
1959	set style(-color) $_settings(-colormap)
1960	}
1961	if { $_currentColormap == "" } {
1962	SetCurrentColormap $style(-color)
1963	$itk_component(colormap) value $style(-color)
1964	}
1965	if { $_currentNumContours != $style(-levels) } {
1966	set _currentNumContours $style(-levels)
1967	set _settings(-numcontours) $_currentNumContours
1968	$itk_component(numcontours) value $_currentNumContours
1969	UpdateContourList
1970	DrawLegend
1971	}
1972	foreach setting {-outline -isolinesvisible -surfacevisible -isolinecolor} {
1973	if {$_changed($setting)} {
1974	# User-modified UI setting overrides style
1975	set style($setting) $_settings($setting)
1976	} else {
1977	# Set UI control to style setting (tool provided or default)
1978	set _settings($setting) $style($setting)
1979	}
1980	}
1981
1982	SendCmd "outline add $tag"
1983	SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
1984	SendCmd "outline visible $style(-outline) $tag"
1985
1986	SendCmd "polydata add $tag"
1987	SendCmd "polydata edges $style(-edges) $tag"
1988	set _settings(-surfaceedges) $style(-edges)
1989	#SendCmd "polydata color [Color2RGB $settings(-color)] $tag"
1990	SendCmd "polydata lighting $style(-lighting) $tag"
1991	set _settings(-surfacelighting) $style(-lighting)
1992	SendCmd "polydata linecolor [Color2RGB $style(-edgecolor)] $tag"
1993	SendCmd "polydata linewidth $style(-linewidth) $tag"
1994	SendCmd "polydata opacity $style(-opacity) $tag"
1995	set _settings(-surfaceopacity) [expr $style(-opacity) * 100.0]
1996	SetCurrentColormap $style(-color)
1997	SendCmd "polydata wireframe $style(-wireframe) $tag"
1998	set _settings(-surfacewireframe) $style(-wireframe)
1999
2000	SendCmd [list contour2d add contourlist $_contourList $tag]
2001	SendCmd "contour2d colormode constant {} $tag"
2002	SendCmd "contour2d color [Color2RGB $style(-isolinecolor)] $tag"
2003	}
2004
2005	itcl::body Rappture::VtkSurfaceViewer::IsValidObject { dataobj } {
2006	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2007	return 0
2008	}
2009	return 1
2010	}
2011
2012	#
2013	# EnterLegend --
2014	#
2015	itcl::body Rappture::VtkSurfaceViewer::EnterLegend { x y } {
2016	SetLegendTip $x $y
2017	}
2018
2019	#
2020	# MotionLegend --
2021	#
2022	itcl::body Rappture::VtkSurfaceViewer::MotionLegend { x y } {
2023	Rappture::Tooltip::tooltip cancel
2024	set c $itk_component(view)
2025	set cw [winfo width $c]
2026	set ch [winfo height $c]
2027	if { $x >= 0 && $x < $cw && $y >= 0 && $y < $ch } {
2028	SetLegendTip $x $y
2029	}
2030	}
2031
2032	#
2033	# LeaveLegend --
2034	#
2035	itcl::body Rappture::VtkSurfaceViewer::LeaveLegend { } {
2036	Rappture::Tooltip::tooltip cancel
2037	.rappturetooltip configure -icon ""
2038	}
2039
2040	#
2041	# SetLegendTip --
2042	#
2043	itcl::body Rappture::VtkSurfaceViewer::SetLegendTip { x y } {
2044	set fname $_curFldName
2045	set c $itk_component(view)
2046	set w [winfo width $c]
2047	set h [winfo height $c]
2048
2049	set font "Arial 8"
2050	set lineht [font metrics $font -linespace]
2051
2052	set ih [image height $_image(legend)]
2053	set iy [expr $y - ($lineht + 2)]
2054
2055	if { [string match "component*" $fname] } {
2056	set title ""
2057	} else {
2058	if { [info exists _fields($fname)] } {
2059	foreach { title units } $_fields($fname) break
2060	if { $units != "" } {
2061	set title [format "%s (%s)" $title $units]
2062	}
2063	} else {
2064	set title $fname
2065	}
2066	}
2067	# If there's a legend title, increase the offset by the line height.
2068	if { $title != "" } {
2069	incr iy -$lineht
2070	}
2071	# Make a swatch of the selected color
2072	if { [catch { $_image(legend) get 10 $iy } pixel] != 0 } {
2073	return
2074	}
2075	if { ![info exists _image(swatch)] } {
2076	set _image(swatch) [image create photo -width 24 -height 24]
2077	}
2078	set color [eval format "\#%02x%02x%02x" $pixel]
2079	$_image(swatch) put black -to 0 0 23 23
2080	$_image(swatch) put $color -to 1 1 22 22
2081	.rappturetooltip configure -icon $_image(swatch)
2082
2083	# Compute the value of the point
2084	if { [info exists _limits($_curFldName)] } {
2085	foreach { vmin vmax } $_limits($_curFldName) break
2086	set t [expr 1.0 - (double($iy) / double($ih-1))]
2087	set value [expr $t * ($vmax - $vmin) + $vmin]
2088	} else {
2089	set value 0.0
2090	}
2091	set tx [expr $x + 15]
2092	set ty [expr $y - 5]
2093	if { [info exists _isolines($y)] } {
2094	Rappture::Tooltip::text $c [format "$title %g (isoline)" $_isolines($y)]
2095	} else {
2096	Rappture::Tooltip::text $c [format "$title %g" $value]
2097	}
2098	Rappture::Tooltip::tooltip show $c +$tx,+$ty
2099	}
2100
2101	#
2102	# ReceiveLegend --
2103	#
2104	# Invoked automatically whenever the "legend" command comes in from
2105	# the rendering server. Indicates that binary image data with the
2106	# specified <size> will follow.
2107	#
2108	itcl::body Rappture::VtkSurfaceViewer::ReceiveLegend { colormap title min max size } {
2109	#puts stderr "ReceiveLegend colormap=$colormap title=$title range=$min,$max size=$size"
2110	set _title $title
2111	regsub {\(mag\)} $title "" _title
2112	if { [IsConnected] } {
2113	set bytes [ReceiveBytes $size]
2114	if { ![info exists _image(legend)] } {
2115	set _image(legend) [image create photo]
2116	}
2117	$_image(legend) configure -data $bytes
2118	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2119	if { [catch {DrawLegend} errs] != 0 } {
2120	global errorInfo
2121	puts stderr "errs=$errs errorInfo=$errorInfo"
2122	}
2123	}
2124	}
2125
2126	#
2127	# DrawLegend --
2128	#
2129	# Draws the legend in the own canvas on the right side of the plot area.
2130	#
2131	itcl::body Rappture::VtkSurfaceViewer::DrawLegend {} {
2132	set fname $_curFldName
2133	set c $itk_component(view)
2134	set w [winfo width $c]
2135	set h [winfo height $c]
2136	set font "Arial 8"
2137	set lineht [font metrics $font -linespace]
2138
2139	if { [string match "component*" $fname] } {
2140	set title ""
2141	} else {
2142	if { [info exists _fields($fname)] } {
2143	foreach { title units } $_fields($fname) break
2144	if { $units != "" } {
2145	set title [format "%s (%s)" $title $units]
2146	}
2147	} else {
2148	set title $fname
2149	}
2150	}
2151	set x [expr $w - 2]
2152	if { !$_settings(-legendvisible) } {
2153	$c delete legend
2154	return
2155	}
2156	if { [$c find withtag "legend"] == "" } {
2157	set y 2
2158	# If there's a legend title, create a text item for the title.
2159	$c create text $x $y \
2160	-anchor ne \
2161	-fill $itk_option(-plotforeground) -tags "title legend" \
2162	-font $font
2163	if { $title != "" } {
2164	incr y $lineht
2165	}
2166	$c create text $x $y \
2167	-anchor ne \
2168	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2169	-font $font
2170	incr y $lineht
2171	$c create image $x $y \
2172	-anchor ne \
2173	-image $_image(legend) -tags "colormap legend"
2174	$c create rectangle $x $y 1 1 \
2175	-fill "" -outline "" -tags "sensor legend"
2176	$c create text $x [expr {$h-2}] \
2177	-anchor se \
2178	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2179	-font $font
2180	$c bind sensor <Enter> [itcl::code $this EnterLegend %x %y]
2181	$c bind sensor <Leave> [itcl::code $this LeaveLegend]
2182	$c bind sensor <Motion> [itcl::code $this MotionLegend %x %y]
2183	}
2184	$c delete isoline
2185	set x2 $x
2186	set iw [image width $_image(legend)]
2187	set ih [image height $_image(legend)]
2188	set x1 [expr $x2 - ($iw*12)/10]
2189	set color $_settings(-isolinecolor)
2190	# Draw the isolines on the legend.
2191	array unset _isolines
2192	if { $color != "none" && [info exists _limits($_curFldName)] &&
2193	$_settings(-isolinesvisible) && $_settings(-numcontours) > 0 } {
2194
2195	foreach { vmin vmax } $_limits($_curFldName) break
2196	set range [expr double($vmax - $vmin)]
2197	if { $range <= 0.0 } {
2198	set range 1.0; # Min is greater or equal to max.
2199	}
2200	set tags "isoline legend"
2201	set offset [expr 2 + $lineht]
2202	if { $title != "" } {
2203	incr offset $lineht
2204	}
2205	foreach value $_contourList {
2206	set norm [expr 1.0 - (($value - $vmin) / $range)]
2207	set y1 [expr int(round(($norm * $ih) + $offset))]
2208	for { set off 0 } { $off < 3 } { incr off } {
2209	set _isolines([expr $y1 + $off]) $value
2210	set _isolines([expr $y1 - $off]) $value
2211	}
2212	$c create line $x1 $y1 $x2 $y1 -fill $color -tags $tags
2213	}
2214	}
2215
2216	$c bind title <ButtonPress> [itcl::code $this Combo post]
2217	$c bind title <Enter> [itcl::code $this Combo activate]
2218	$c bind title <Leave> [itcl::code $this Combo deactivate]
2219	# Reset the item coordinates according the current size of the plot.
2220	$c itemconfigure title -text $title
2221	if { [info exists _limits($_curFldName)] } {
2222	foreach { vmin vmax } $_limits($_curFldName) break
2223	$c itemconfigure vmin -text [format %g $vmin]
2224	$c itemconfigure vmax -text [format %g $vmax]
2225	}
2226	set y 2
2227	# If there's a legend title, move the title to the correct position
2228	if { $title != "" } {
2229	$c itemconfigure title -text $title
2230	$c coords title $x $y
2231	incr y $lineht
2232	$c raise title
2233	}
2234	$c coords vmax $x $y
2235	incr y $lineht
2236	$c coords colormap $x $y
2237	$c coords sensor [expr $x - $iw] $y $x [expr $y + $ih]
2238	$c raise sensor
2239	$c coords vmin $x [expr {$h - 2}]
2240	}
2241
2242	# ----------------------------------------------------------------------
2243	# USAGE: _dropdown post
2244	# USAGE: _dropdown unpost
2245	# USAGE: _dropdown select
2246	#
2247	# Used internally to handle the dropdown list for this combobox. The
2248	# post/unpost options are invoked when the list is posted or unposted
2249	# to manage the relief of the controlling button. The select option
2250	# is invoked whenever there is a selection from the list, to assign
2251	# the value back to the gauge.
2252	# ----------------------------------------------------------------------
2253	itcl::body Rappture::VtkSurfaceViewer::Combo {option} {
2254	set c $itk_component(view)
2255	switch -- $option {
2256	post {
2257	foreach { x1 y1 x2 y2 } [$c bbox title] break
2258	set cw [winfo width $itk_component(view)]
2259	set mw [winfo reqwidth $itk_component(fieldmenu)]
2260	set x1 [expr $cw - $mw]
2261	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2262	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2263	tk_popup $itk_component(fieldmenu) $x $y
2264	}
2265	activate {
2266	$c itemconfigure title -fill red
2267	}
2268	deactivate {
2269	$c itemconfigure title -fill $itk_option(-plotforeground)
2270	}
2271	invoke {
2272	$itk_component(field) value $_curFldLabel
2273	AdjustSetting -field
2274	}
2275	default {
2276	error "bad option \"$option\": should be post, unpost, select"
2277	}
2278	}
2279	}
2280
2281	#
2282	# SetCurrentColormap --
2283	#
2284	itcl::body Rappture::VtkSurfaceViewer::SetCurrentColormap { name } {
2285	# Keep track of the colormaps that we build.
2286	if { ![info exists _colormaps($name)] } {
2287	BuildColormap $name
2288	set _colormaps($name) 1
2289	}
2290	set _currentColormap $name
2291	SendCmd "contour2d colormap $_currentColormap"
2292	SendCmd "polydata colormap $_currentColormap"
2293	}
2294
2295	#
2296	# BuildColormap --
2297	#
2298	# Build the designated colormap on the server.
2299	#
2300	itcl::body Rappture::VtkSurfaceViewer::BuildColormap { name } {
2301	set cmap [ColorsToColormap $name]
2302	if { [llength $cmap] == 0 } {
2303	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
2304	}
2305	set wmap "0.0 1.0 1.0 1.0"
2306	SendCmd "colormap add $name { $cmap } { $wmap }"
2307	}
2308
2309	itcl::body Rappture::VtkSurfaceViewer::SetOrientation { side } {
2310	array set positions {
2311	front "1 0 0 0"
2312	back "0 0 1 0"
2313	left "0.707107 0 -0.707107 0"
2314	right "0.707107 0 0.707107 0"
2315	top "0.707107 -0.707107 0 0"
2316	bottom "0.707107 0.707107 0 0"
2317	}
2318	foreach name { -qw -qx -qy -qz } value $positions($side) {
2319	set _view($name) $value
2320	}
2321	set q [ViewToQuaternion]
2322	$_arcball quaternion $q
2323	SendCmd "camera orient $q"
2324	SendCmd "camera reset"
2325	set _view(-xpan) 0
2326	set _view(-ypan) 0
2327	set _view(-zoom) 1.0
2328	}
2329
2330	itcl::body Rappture::VtkSurfaceViewer::UpdateContourList {} {
2331	if { ![info exists _limits($_curFldName)] } {
2332	return
2333	}
2334	if { $_currentNumContours < 1 } {
2335	set _contourList ""
2336	return
2337	}
2338	foreach { vmin vmax } $_limits($_curFldName) break
2339	set v [blt::vector create \#auto]
2340	$v seq $vmin $vmax [expr $_currentNumContours+2]
2341	$v delete end 0
2342	set _contourList [$v range 0 end]
2343	blt::vector destroy $v
2344	}

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