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source: trunk/gui/scripts/vtksurfaceviewer.tcl @ 4682

Last change on this file since 4682 was 4682, checked in by ldelgass, 10 years ago
Axis fixes for vtksurface viewer
File size: 77.1 KB

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1	# -- mode: tcl; indent-tabs-mode: nil --
2	# ----------------------------------------------------------------------
3	# COMPONENT: vtksurfaceviewer - Vtk 3D boundary surface viewer
4	#
5	# It connects to the Vtk server running on a rendering farm,
6	# transmits data, and displays the results.
7	# ======================================================================
8	# AUTHOR: Michael McLennan, Purdue University
9	# Copyright (c) 2004-2014 HUBzero Foundation, LLC
10	#
11	# See the file "license.terms" for information on usage and
12	# redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
13	# ======================================================================
14	package require Itk
15	package require BLT
16	#package require Img
17
18	option add *VtkSurfaceViewer.width 4i widgetDefault
19	option add VtkSurfaceViewercursor crosshair widgetDefault
20	option add *VtkSurfaceViewer.height 4i widgetDefault
21	option add *VtkSurfaceViewer.foreground black widgetDefault
22	option add *VtkSurfaceViewer.controlBackground gray widgetDefault
23	option add *VtkSurfaceViewer.controlDarkBackground #999999 widgetDefault
24	option add *VtkSurfaceViewer.plotBackground black widgetDefault
25	option add *VtkSurfaceViewer.plotForeground white widgetDefault
26	option add *VtkSurfaceViewer.font \
27	--helvetica-medium-r-normal--12-* widgetDefault
28
29	# must use this name -- plugs into Rappture::resources::load
30	proc VtkSurfaceViewer_init_resources {} {
31	Rappture::resources::register \
32	vtkvis_server Rappture::VtkSurfaceViewer::SetServerList
33	}
34
35	itcl::class Rappture::VtkSurfaceViewer {
36	inherit Rappture::VisViewer
37
38	itk_option define -plotforeground plotForeground Foreground ""
39	itk_option define -plotbackground plotBackground Background ""
40
41	constructor { hostlist args } {
42	Rappture::VisViewer::constructor $hostlist
43	} {
44	# defined below
45	}
46	destructor {
47	# defined below
48	}
49	public proc SetServerList { namelist } {
50	Rappture::VisViewer::SetServerList "vtkvis" $namelist
51	}
52	public method add {dataobj {settings ""}}
53	public method camera {option args}
54	public method delete {args}
55	public method disconnect {}
56	public method download {option args}
57	public method get {args}
58	public method isconnected {}
59	public method limits { colormap }
60	public method parameters {title args} {
61	# do nothing
62	}
63	public method scale {args}
64
65	protected method Connect {}
66	protected method CurrentDatasets {args}
67	protected method Disconnect {}
68	protected method DoResize {}
69	protected method DoRotate {}
70	protected method AdjustSetting {what {value ""}}
71	protected method InitSettings { args }
72	protected method Pan {option x y}
73	protected method Pick {x y}
74	protected method Rebuild {}
75	protected method ReceiveDataset { args }
76	protected method ReceiveImage { args }
77	protected method ReceiveLegend { colormap title vmin vmax size }
78	protected method Rotate {option x y}
79	protected method Zoom {option}
80
81	# The following methods are only used by this class.
82	private method BuildAxisTab {}
83	private method BuildCameraTab {}
84	private method BuildColormap { name }
85	private method BuildDownloadPopup { widget command }
86	private method BuildSurfaceTab {}
87	private method Combo { option }
88	private method DrawLegend {}
89	private method EnterLegend { x y }
90	private method EventuallyResize { w h }
91	private method EventuallyRotate { q }
92	private method EventuallyRequestLegend {}
93	private method GetImage { args }
94	private method GetVtkData { args }
95	private method IsValidObject { dataobj }
96	private method LeaveLegend {}
97	private method MotionLegend { x y }
98	private method PanCamera {}
99	private method RequestLegend {}
100	private method SetLegendTip { x y }
101	private method SetObjectStyle { dataobj comp }
102	private method SetCurrentColormap { color }
103	private method SetOrientation { side }
104	private method UpdateContourList {}
105
106	private variable _arcball ""
107
108	private variable _dlist "" ; # list of data objects
109	private variable _obj2datasets
110	private variable _obj2ovride ; # maps dataobj => style override
111	private variable _datasets ; # contains all the dataobj-component
112	; # datasets in the server
113	private variable _colormaps ; # contains all the colormaps
114	; # in the server.
115	# The name of the current colormap used. The colormap is global to all
116	# heightmaps displayed.
117	private variable _currentColormap ""
118	private variable _currentNumContours -1
119
120	private variable _dataset2style ;# maps dataobj-component to transfunc
121
122	private variable _click ; # info used for rotate operations
123	private variable _limits ; # autoscale min/max for all axes
124	private variable _view ; # view params for 3D view
125	private variable _settings
126	private variable _style; # Array of current component styles.
127	private variable _changed
128	private variable _initialStyle; # Array of initial component styles.
129	private variable _reset 1; # indicates if camera needs to be reset
130	# to starting position.
131
132	private variable _first "" ; # This is the topmost dataset.
133	private variable _start 0
134	private variable _title ""
135	private variable _isolines
136	private variable _contourList ""
137
138	common _downloadPopup; # download options from popup
139	private common _hardcopy
140	private variable _width 0
141	private variable _height 0
142	private variable _resizePending 0
143	private variable _rotatePending 0
144	private variable _legendPending 0
145	private variable _field ""
146	private variable _colorMode "scalar"; # Mode of colormap (vmag or scalar)
147	private variable _fieldNames {}
148	private variable _fields
149	private variable _curFldName ""
150	private variable _curFldLabel ""
151	}
152
153	itk::usual VtkSurfaceViewer {
154	keep -background -foreground -cursor -font
155	keep -plotbackground -plotforeground
156	}
157
158	# ----------------------------------------------------------------------
159	# CONSTRUCTOR
160	# ----------------------------------------------------------------------
161	itcl::body Rappture::VtkSurfaceViewer::constructor {hostlist args} {
162	package require vtk
163	set _serverType "vtkvis"
164
165	# Rebuild event
166	$_dispatcher register !rebuild
167	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
168
169	# Resize event
170	$_dispatcher register !resize
171	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
172
173	# Rotate event
174	$_dispatcher register !rotate
175	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
176
177	# Legend event
178	$_dispatcher register !legend
179	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
180
181	#
182	# Populate parser with commands handle incoming requests
183	#
184	$_parser alias image [itcl::code $this ReceiveImage]
185	$_parser alias dataset [itcl::code $this ReceiveDataset]
186	$_parser alias legend [itcl::code $this ReceiveLegend]
187
188	# Initialize the view to some default parameters.
189	array set _view {
190	qw 0.853553
191	qx -0.353553
192	qy 0.353553
193	qz 0.146447
194	zoom 1.0
195	xpan 0
196	ypan 0
197	ortho 0
198	}
199	set _arcball [blt::arcball create 100 100]
200	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
201	$_arcball quaternion $q
202
203	array set _settings {
204	-axesvisible 1
205	-axislabels 1
206	-axisminorticks 1
207	-background black
208	-colormap BCGYR
209	-colormapvisible 1
210	-field "Default"
211	-isolinecolor white
212	-isolinesvisible 0
213	-legendvisible 1
214	-numcontours 10
215	-surfaceedges 0
216	-surfacelighting 1
217	-surfaceopacity 100
218	-outline 0
219	-surfacevisible 1
220	-surfacewireframe 0
221	-xgrid 0
222	-ygrid 0
223	-zgrid 0
224	}
225	array set _changed {
226	-colormap 0
227	-numcontours 0
228	-surfaceopacity 0
229	}
230
231	itk_component add view {
232	canvas $itk_component(plotarea).view \
233	-highlightthickness 0 -borderwidth 0
234	} {
235	usual
236	ignore -highlightthickness -borderwidth -background
237	}
238
239	itk_component add fieldmenu {
240	menu $itk_component(plotarea).menu -bg black -fg white -relief flat \
241	-tearoff 0
242	} {
243	usual
244	ignore -background -foreground -relief -tearoff
245	}
246	set c $itk_component(view)
247	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
248	bind $c <4> [itcl::code $this Zoom in 0.25]
249	bind $c <5> [itcl::code $this Zoom out 0.25]
250	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
251	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
252	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
253	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
254	bind $c <Enter> "focus %W"
255	bind $c <Control-F1> [itcl::code $this ToggleConsole]
256
257	# Fix the scrollregion in case we go off screen
258	$c configure -scrollregion [$c bbox all]
259
260	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
261	set _map(cwidth) -1
262	set _map(cheight) -1
263	set _map(zoom) 1.0
264	set _map(original) ""
265
266	set f [$itk_component(main) component controls]
267	itk_component add reset {
268	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
269	-highlightthickness 0 \
270	-image [Rappture::icon reset-view] \
271	-command [itcl::code $this Zoom reset]
272	} {
273	usual
274	ignore -highlightthickness
275	}
276	pack $itk_component(reset) -side top -padx 2 -pady 2
277	Rappture::Tooltip::for $itk_component(reset) \
278	"Reset the view to the default zoom level"
279
280	itk_component add zoomin {
281	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
282	-highlightthickness 0 \
283	-image [Rappture::icon zoom-in] \
284	-command [itcl::code $this Zoom in]
285	} {
286	usual
287	ignore -highlightthickness
288	}
289	pack $itk_component(zoomin) -side top -padx 2 -pady 2
290	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
291
292	itk_component add zoomout {
293	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
294	-highlightthickness 0 \
295	-image [Rappture::icon zoom-out] \
296	-command [itcl::code $this Zoom out]
297	} {
298	usual
299	ignore -highlightthickness
300	}
301	pack $itk_component(zoomout) -side top -padx 2 -pady 2
302	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
303
304	itk_component add surface {
305	Rappture::PushButton $f.surface \
306	-onimage [Rappture::icon volume-on] \
307	-offimage [Rappture::icon volume-off] \
308	-variable [itcl::scope _settings(-surfacevisible)] \
309	-command [itcl::code $this AdjustSetting -surfacevisible]
310	}
311	$itk_component(surface) select
312	Rappture::Tooltip::for $itk_component(surface) \
313	"Don't display the surface"
314	pack $itk_component(surface) -padx 2 -pady 2
315
316	if { [catch {
317	BuildSurfaceTab
318	BuildAxisTab
319	BuildCameraTab
320	} errs] != 0 } {
321	puts stderr errs=$errs
322	}
323	# Legend
324
325	set _image(legend) [image create photo]
326	itk_component add legend {
327	canvas $itk_component(plotarea).legend -width 50 -highlightthickness 0
328	} {
329	usual
330	ignore -highlightthickness
331	rename -background -plotbackground plotBackground Background
332	}
333
334	# Hack around the Tk panewindow. The problem is that the requested
335	# size of the 3d view isn't set until an image is retrieved from
336	# the server. So the panewindow uses the tiny size.
337	set w 10000
338	pack forget $itk_component(view)
339	blt::table $itk_component(plotarea) \
340	0,0 $itk_component(view) -fill both -reqwidth $w
341	blt::table configure $itk_component(plotarea) c1 -resize none
342
343	# Bindings for rotation via mouse
344	bind $itk_component(view) <ButtonPress-1> \
345	[itcl::code $this Rotate click %x %y]
346	bind $itk_component(view) <B1-Motion> \
347	[itcl::code $this Rotate drag %x %y]
348	bind $itk_component(view) <ButtonRelease-1> \
349	[itcl::code $this Rotate release %x %y]
350
351	# Bindings for panning via mouse
352	bind $itk_component(view) <ButtonPress-2> \
353	[itcl::code $this Pan click %x %y]
354	bind $itk_component(view) <B2-Motion> \
355	[itcl::code $this Pan drag %x %y]
356	bind $itk_component(view) <ButtonRelease-2> \
357	[itcl::code $this Pan release %x %y]
358
359	#bind $itk_component(view) <ButtonRelease-3> \
360	# [itcl::code $this Pick %x %y]
361
362	# Bindings for panning via keyboard
363	bind $itk_component(view) <KeyPress-Left> \
364	[itcl::code $this Pan set -10 0]
365	bind $itk_component(view) <KeyPress-Right> \
366	[itcl::code $this Pan set 10 0]
367	bind $itk_component(view) <KeyPress-Up> \
368	[itcl::code $this Pan set 0 -10]
369	bind $itk_component(view) <KeyPress-Down> \
370	[itcl::code $this Pan set 0 10]
371	bind $itk_component(view) <Shift-KeyPress-Left> \
372	[itcl::code $this Pan set -2 0]
373	bind $itk_component(view) <Shift-KeyPress-Right> \
374	[itcl::code $this Pan set 2 0]
375	bind $itk_component(view) <Shift-KeyPress-Up> \
376	[itcl::code $this Pan set 0 -2]
377	bind $itk_component(view) <Shift-KeyPress-Down> \
378	[itcl::code $this Pan set 0 2]
379
380	# Bindings for zoom via keyboard
381	bind $itk_component(view) <KeyPress-Prior> \
382	[itcl::code $this Zoom out]
383	bind $itk_component(view) <KeyPress-Next> \
384	[itcl::code $this Zoom in]
385
386	bind $itk_component(view) <Enter> "focus $itk_component(view)"
387
388	if {[string equal "x11" [tk windowingsystem]]} {
389	# Bindings for zoom via mouse
390	bind $itk_component(view) <4> [itcl::code $this Zoom out]
391	bind $itk_component(view) <5> [itcl::code $this Zoom in]
392	}
393
394	set _image(download) [image create photo]
395
396	eval itk_initialize $args
397
398	EnableWaitDialog 500
399	Connect
400	}
401
402	# ----------------------------------------------------------------------
403	# DESTRUCTOR
404	# ----------------------------------------------------------------------
405	itcl::body Rappture::VtkSurfaceViewer::destructor {} {
406	Disconnect
407	image delete $_image(plot)
408	image delete $_image(download)
409	catch { blt::arcball destroy $_arcball }
410	}
411
412	itcl::body Rappture::VtkSurfaceViewer::DoResize {} {
413	if { $_width < 2 } {
414	set _width 500
415	}
416	if { $_height < 2 } {
417	set _height 500
418	}
419	set _start [clock clicks -milliseconds]
420	SendCmd "screen size $_width $_height"
421
422	EventuallyRequestLegend
423	set _resizePending 0
424	}
425
426	itcl::body Rappture::VtkSurfaceViewer::DoRotate {} {
427	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
428	SendCmd "camera orient $q"
429	set _rotatePending 0
430	}
431
432	itcl::body Rappture::VtkSurfaceViewer::EventuallyRequestLegend {} {
433	if { !$_legendPending } {
434	set _legendPending 1
435	$_dispatcher event -idle !legend
436	}
437	}
438
439	itcl::body Rappture::VtkSurfaceViewer::EventuallyResize { w h } {
440	set _width $w
441	set _height $h
442	$_arcball resize $w $h
443	if { !$_resizePending } {
444	set _resizePending 1
445	$_dispatcher event -after 400 !resize
446	}
447	}
448
449	set rotate_delay 100
450
451	itcl::body Rappture::VtkSurfaceViewer::EventuallyRotate { q } {
452	foreach { _view(qw) _view(qx) _view(qy) _view(qz) } $q break
453	if { !$_rotatePending } {
454	set _rotatePending 1
455	global rotate_delay
456	$_dispatcher event -after $rotate_delay !rotate
457	}
458	}
459
460	# ----------------------------------------------------------------------
461	# USAGE: add <dataobj> ?<settings>?
462	#
463	# Clients use this to add a data object to the plot. The optional
464	# <settings> are used to configure the plot. Allowed settings are
465	# -color, -brightness, -width, -linestyle, and -raise.
466	# ----------------------------------------------------------------------
467	itcl::body Rappture::VtkSurfaceViewer::add {dataobj {settings ""}} {
468	if { ![$dataobj isvalid] } {
469	return; # Object doesn't contain valid data.
470	}
471	array set params {
472	-color auto
473	-width 1
474	-linestyle solid
475	-brightness 0
476	-raise 0
477	-description ""
478	-param ""
479	-type ""
480	}
481	array set params $settings
482	set params(-description) ""
483	set params(-param) ""
484	array set params $settings
485
486	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
487	# can't handle -autocolors yet
488	set params(-color) black
489	}
490	set pos [lsearch -exact $_dlist $dataobj]
491	if {$pos < 0} {
492	lappend _dlist $dataobj
493	}
494	set _obj2ovride($dataobj-color) $params(-color)
495	set _obj2ovride($dataobj-width) $params(-width)
496	set _obj2ovride($dataobj-raise) $params(-raise)
497	$_dispatcher event -idle !rebuild
498	}
499
500
501	# ----------------------------------------------------------------------
502	# USAGE: delete ?<dataobj1> <dataobj2> ...?
503	#
504	# Clients use this to delete a dataobj from the plot. If no dataobjs
505	# are specified, then all dataobjs are deleted. No data objects are
506	# deleted. They are only removed from the display list.
507	#
508	# ----------------------------------------------------------------------
509	itcl::body Rappture::VtkSurfaceViewer::delete {args} {
510	if { [llength $args] == 0} {
511	set args $_dlist
512	}
513	# Delete all specified dataobjs
514	set changed 0
515	foreach dataobj $args {
516	set pos [lsearch -exact $_dlist $dataobj]
517	if { $pos < 0 } {
518	continue; # Don't know anything about it.
519	}
520	# Remove it from the dataobj list.
521	set _dlist [lreplace $_dlist $pos $pos]
522	array unset _obj2ovride $dataobj-*
523	array unset _settings $dataobj-*
524	set changed 1
525	}
526	# If anything changed, then rebuild the plot
527	if { $changed } {
528	$_dispatcher event -idle !rebuild
529	}
530	}
531
532	# ----------------------------------------------------------------------
533	# USAGE: get ?-objects?
534	# USAGE: get ?-visible?
535	# USAGE: get ?-image view?
536	#
537	# Clients use this to query the list of objects being plotted, in
538	# order from bottom to top of this result. The optional "-image"
539	# flag can also request the internal images being shown.
540	# ----------------------------------------------------------------------
541	itcl::body Rappture::VtkSurfaceViewer::get {args} {
542	if {[llength $args] == 0} {
543	set args "-objects"
544	}
545
546	set op [lindex $args 0]
547	switch -- $op {
548	"-objects" {
549	# put the dataobj list in order according to -raise options
550	set dlist {}
551	foreach dataobj $_dlist {
552	if { ![IsValidObject $dataobj] } {
553	continue
554	}
555	if {[info exists _obj2ovride($dataobj-raise)] &&
556	$_obj2ovride($dataobj-raise)} {
557	set dlist [linsert $dlist 0 $dataobj]
558	} else {
559	lappend dlist $dataobj
560	}
561	}
562	return $dlist
563	}
564	"-visible" {
565	set dlist {}
566	foreach dataobj $_dlist {
567	if { ![IsValidObject $dataobj] } {
568	continue
569	}
570	if { ![info exists _obj2ovride($dataobj-raise)] } {
571	# No setting indicates that the object isn't visible.
572	continue
573	}
574	# Otherwise use the -raise parameter to put the object to
575	# the front of the list.
576	if { $_obj2ovride($dataobj-raise) } {
577	set dlist [linsert $dlist 0 $dataobj]
578	} else {
579	lappend dlist $dataobj
580	}
581	}
582	return $dlist
583	}
584	-image {
585	if {[llength $args] != 2} {
586	error "wrong # args: should be \"get -image view\""
587	}
588	switch -- [lindex $args end] {
589	view {
590	return $_image(plot)
591	}
592	default {
593	error "bad image name \"[lindex $args end]\": should be view"
594	}
595	}
596	}
597	default {
598	error "bad option \"$op\": should be -objects or -image"
599	}
600	}
601	}
602
603	# ----------------------------------------------------------------------
604	# USAGE: scale ?<data1> <data2> ...?
605	#
606	# Sets the default limits for the overall plot according to the
607	# limits of the data for all of the given <data> objects. This
608	# accounts for all objects--even those not showing on the screen.
609	# Because of this, the limits are appropriate for all objects as
610	# the user scans through data in the ResultSet viewer.
611	# ----------------------------------------------------------------------
612	itcl::body Rappture::VtkSurfaceViewer::scale { args } {
613	foreach dataobj $args {
614	if { ![$dataobj isvalid] } {
615	continue; # Object doesn't contain valid data.
616	}
617	foreach axis { x y z } {
618	set lim [$dataobj limits $axis]
619	if { ![info exists _limits($axis)] } {
620	set _limits($axis) $lim
621	continue
622	}
623	foreach {min max} $lim break
624	foreach {amin amax} $_limits($axis) break
625	if { $amin > $min } {
626	set amin $min
627	}
628	if { $amax < $max } {
629	set amax $max
630	}
631	set _limits($axis) [list $amin $amax]
632	}
633	foreach { fname lim } [$dataobj fieldlimits] {
634	if { ![info exists _limits($fname)] } {
635	set _limits($fname) $lim
636	continue
637	}
638	foreach {min max} $lim break
639	foreach {fmin fmax} $_limits($fname) break
640	if { $fmin > $min } {
641	set fmin $min
642	}
643	if { $fmax < $max } {
644	set fmax $max
645	}
646	set _limits($fname) [list $fmin $fmax]
647	}
648	}
649	}
650
651	# ----------------------------------------------------------------------
652	# USAGE: download coming
653	# USAGE: download controls <downloadCommand>
654	# USAGE: download now
655	#
656	# Clients use this method to create a downloadable representation
657	# of the plot. Returns a list of the form {ext string}, where
658	# "ext" is the file extension (indicating the type of data) and
659	# "string" is the data itself.
660	# ----------------------------------------------------------------------
661	itcl::body Rappture::VtkSurfaceViewer::download {option args} {
662	switch $option {
663	coming {
664	if {[catch {
665	blt::winop snap $itk_component(plotarea) $_image(download)
666	}]} {
667	$_image(download) configure -width 1 -height 1
668	$_image(download) put #000000
669	}
670	}
671	controls {
672	set popup .vtkviewerdownload
673	if { ![winfo exists .vtkviewerdownload] } {
674	set inner [BuildDownloadPopup $popup [lindex $args 0]]
675	} else {
676	set inner [$popup component inner]
677	}
678	set _downloadPopup(image_controls) $inner.image_frame
679	set num [llength [get]]
680	set num [expr {($num == 1) ? "1 result" : "$num results"}]
681	set word [Rappture::filexfer::label downloadWord]
682	$inner.summary configure -text "$word $num in the following format:"
683	update idletasks ;# Fix initial sizes
684	return $popup
685	}
686	now {
687	set popup .vtkviewerdownload
688	if {[winfo exists .vtkviewerdownload]} {
689	$popup deactivate
690	}
691	switch -- $_downloadPopup(format) {
692	"image" {
693	return [$this GetImage [lindex $args 0]]
694	}
695	"vtk" {
696	return [$this GetVtkData [lindex $args 0]]
697	}
698	}
699	return ""
700	}
701	default {
702	error "bad option \"$option\": should be coming, controls, now"
703	}
704	}
705	}
706
707	# ----------------------------------------------------------------------
708	# USAGE: Connect ?<host:port>,<host:port>...?
709	#
710	# Clients use this method to establish a connection to a new
711	# server, or to reestablish a connection to the previous server.
712	# Any existing connection is automatically closed.
713	# ----------------------------------------------------------------------
714	itcl::body Rappture::VtkSurfaceViewer::Connect {} {
715	set _hosts [GetServerList "vtkvis"]
716	if { "" == $_hosts } {
717	return 0
718	}
719	set result [VisViewer::Connect $_hosts]
720	if { $result } {
721	if { $_reportClientInfo } {
722	# Tell the server the viewer, hub, user and session.
723	# Do this immediately on connect before buffering any commands
724	global env
725
726	set info {}
727	set user "???"
728	if { [info exists env(USER)] } {
729	set user $env(USER)
730	}
731	set session "???"
732	if { [info exists env(SESSION)] } {
733	set session $env(SESSION)
734	}
735	lappend info "version" "$Rappture::version"
736	lappend info "build" "$Rappture::build"
737	lappend info "svnurl" "$Rappture::svnurl"
738	lappend info "installdir" "$Rappture::installdir"
739	lappend info "hub" [exec hostname]
740	lappend info "client" "vtksurfaceviewer"
741	lappend info "user" $user
742	lappend info "session" $session
743	SendCmd "clientinfo [list $info]"
744	}
745
746	set w [winfo width $itk_component(view)]
747	set h [winfo height $itk_component(view)]
748	EventuallyResize $w $h
749	}
750	return $result
751	}
752
753	#
754	# isconnected --
755	#
756	# Indicates if we are currently connected to the visualization server.
757	#
758	itcl::body Rappture::VtkSurfaceViewer::isconnected {} {
759	return [VisViewer::IsConnected]
760	}
761
762	#
763	# disconnect --
764	#
765	itcl::body Rappture::VtkSurfaceViewer::disconnect {} {
766	Disconnect
767	set _reset 1
768	}
769
770	#
771	# Disconnect --
772	#
773	# Clients use this method to disconnect from the current rendering
774	# server.
775	#
776	itcl::body Rappture::VtkSurfaceViewer::Disconnect {} {
777	VisViewer::Disconnect
778
779	$_dispatcher cancel !rebuild
780	$_dispatcher cancel !resize
781	$_dispatcher cancel !rotate
782	$_dispatcher cancel !legend
783	# disconnected -- no more data sitting on server
784	set _outbuf ""
785	array unset _datasets
786	array unset _data
787	array unset _colormaps
788	array unset _seeds
789	array unset _dataset2style
790	array unset _obj2datasets
791	}
792
793	# ----------------------------------------------------------------------
794	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
795	#
796	# Invoked automatically whenever the "image" command comes in from
797	# the rendering server. Indicates that binary image data with the
798	# specified <size> will follow.
799	# ----------------------------------------------------------------------
800	itcl::body Rappture::VtkSurfaceViewer::ReceiveImage { args } {
801	array set info {
802	-token "???"
803	-bytes 0
804	-type image
805	}
806	array set info $args
807	set bytes [ReceiveBytes $info(-bytes)]
808	if { $info(-type) == "image" } {
809	if 0 {
810	set f [open "last.ppm" "w"]
811	puts $f $bytes
812	close $f
813	}
814	$_image(plot) configure -data $bytes
815	#set time [clock seconds]
816	#set date [clock format $time]
817	#set w [image width $_image(plot)]
818	#set h [image height $_image(plot)]
819	#puts stderr "$date: received image ${w}x${h} image"
820	if { $_start > 0 } {
821	set finish [clock clicks -milliseconds]
822	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
823	set _start 0
824	}
825	} elseif { $info(type) == "print" } {
826	set tag $this-print-$info(-token)
827	set _hardcopy($tag) $bytes
828	}
829	}
830
831	#
832	# ReceiveDataset --
833	#
834	itcl::body Rappture::VtkSurfaceViewer::ReceiveDataset { args } {
835	if { ![isconnected] } {
836	return
837	}
838	set option [lindex $args 0]
839	switch -- $option {
840	"scalar" {
841	set option [lindex $args 1]
842	switch -- $option {
843	"world" {
844	foreach { x y z value tag } [lrange $args 2 end] break
845	}
846	"pixel" {
847	foreach { x y value tag } [lrange $args 2 end] break
848	}
849	}
850	}
851	"vector" {
852	set option [lindex $args 1]
853	switch -- $option {
854	"world" {
855	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
856	}
857	"pixel" {
858	foreach { x y vx vy vz tag } [lrange $args 2 end] break
859	}
860	}
861	}
862	"names" {
863	foreach { name } [lindex $args 1] {
864	#puts stderr "Dataset: $name"
865	}
866	}
867	default {
868	error "unknown dataset option \"$option\" from server"
869	}
870	}
871	}
872
873	# ----------------------------------------------------------------------
874	# USAGE: Rebuild
875	#
876	# Called automatically whenever something changes that affects the
877	# data in the widget. Clears any existing data and rebuilds the
878	# widget to display new data.
879	# ----------------------------------------------------------------------
880	itcl::body Rappture::VtkSurfaceViewer::Rebuild {} {
881	set w [winfo width $itk_component(view)]
882	set h [winfo height $itk_component(view)]
883	if { $w < 2 \|\| $h < 2 } {
884	$_dispatcher event -idle !rebuild
885	return
886	}
887
888	# Turn on buffering of commands to the server. We don't want to
889	# be preempted by a server disconnect/reconnect (which automatically
890	# generates a new call to Rebuild).
891	StartBufferingCommands
892
893	if { $_reset } {
894	set _width $w
895	set _height $h
896	$_arcball resize $w $h
897	DoResize
898	#
899	# Reset the camera and other view parameters
900	#
901	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
902	$_arcball quaternion $q
903	if {$_view(ortho)} {
904	SendCmd "camera mode ortho"
905	} else {
906	SendCmd "camera mode persp"
907	}
908	DoRotate
909	PanCamera
910	set _first ""
911	InitSettings -xaxisgrid -yaxisgrid -zaxisgrid -axismode \
912	-axesvisible -axislabels -axisminorticks
913	#SendCmd "axis lformat all %g"
914	StopBufferingCommands
915	SendCmd "imgflush"
916	StartBufferingCommands
917	}
918	set _first ""
919	SendCmd "dataset visible 0"
920	foreach dataobj [get -objects] {
921	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
922	set _first $dataobj
923	}
924	set _obj2datasets($dataobj) ""
925	foreach comp [$dataobj components] {
926	set tag $dataobj-$comp
927	if { ![info exists _datasets($tag)] } {
928	set bytes [$dataobj vtkdata $comp]
929	if 0 {
930	set f [open "/tmp/surface.vtk" "w"]
931	puts $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" [$dataobj hints toolName]
939	lappend info "tool_version" [$dataobj hints toolRevision]
940	lappend info "tool_title" [$dataobj hints toolTitle]
941	lappend info "dataset_label" [$dataobj hints label]
942	lappend info "dataset_size" $length
943	lappend info "dataset_tag" $tag
944	SendCmd "clientinfo [list $info]"
945	}
946	append _outbuf "dataset add $tag data follows $length\n"
947	append _outbuf $bytes
948	set _datasets($tag) 1
949	SetObjectStyle $dataobj $comp
950	}
951	lappend _obj2datasets($dataobj) $tag
952	if { [info exists _obj2ovride($dataobj-raise)] } {
953	# Setting dataset visible enables outline
954	# and contour2d
955	SendCmd "dataset visible 1 $tag"
956	}
957	}
958	}
959
960	if { $_first != "" } {
961	$itk_component(field) choices delete 0 end
962	$itk_component(fieldmenu) delete 0 end
963	array unset _fields
964	set _curFldName ""
965	foreach cname [$_first components] {
966	foreach fname [$_first fieldnames $cname] {
967	if { [info exists _fields($fname)] } {
968	continue
969	}
970	foreach { label units components } \
971	[$_first fieldinfo $fname] break
972	$itk_component(field) choices insert end "$fname" "$label"
973	$itk_component(fieldmenu) add radiobutton -label "$label" \
974	-value $label -variable [itcl::scope _curFldLabel] \
975	-selectcolor red \
976	-activebackground $itk_option(-plotbackground) \
977	-activeforeground $itk_option(-plotforeground) \
978	-font "Arial 8" \
979	-command [itcl::code $this Combo invoke]
980	set _fields($fname) [list $label $units $components]
981	if { $_curFldName == "" } {
982	set _curFldName $fname
983	set _curFldLabel $label
984	}
985	}
986	}
987	$itk_component(field) value $_curFldLabel
988	}
989	InitSettings -isolinesvisible -surfacevisible -outline
990	if { $_reset } {
991	# These are settings that rely on a dataset being loaded.
992	InitSettings \
993	-surfacelighting \
994	-field \
995	-surfaceedges -surfacelighting -surfaceopacity \
996	-surfacewireframe \
997	-numcontours
998
999	Zoom reset
1000	foreach axis { x y z } {
1001	# Another problem fixed by a <view>. We looking into a data
1002	# object for the name of the axes. This should be global to
1003	# the viewer itself.
1004	set label [$_first hints ${axis}label]
1005	if { $label == "" } {
1006	set label [string toupper $axis]
1007	}
1008	# May be a space in the axis label.
1009	SendCmd [list axis name $axis $label]
1010	}
1011	if { [array size _fields] < 2 } {
1012	catch {blt::table forget $itk_component(field) $itk_component(field_l)}
1013	}
1014	set _reset 0
1015	}
1016
1017	# Actually write the commands to the server socket. If it fails, we don't
1018	# care. We're finished here.
1019	blt::busy hold $itk_component(hull)
1020	StopBufferingCommands; # Turn off buffering and send commands.
1021	blt::busy release $itk_component(hull)
1022	}
1023
1024	# ----------------------------------------------------------------------
1025	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1026	#
1027	# Returns a list of server IDs for the current datasets being displayed. This
1028	# is normally a single ID, but it might be a list of IDs if the current data
1029	# object has multiple components.
1030	# ----------------------------------------------------------------------
1031	itcl::body Rappture::VtkSurfaceViewer::CurrentDatasets {args} {
1032	set flag [lindex $args 0]
1033	switch -- $flag {
1034	"-all" {
1035	if { [llength $args] > 1 } {
1036	error "CurrentDatasets: can't specify dataobj after \"-all\""
1037	}
1038	set dlist [get -objects]
1039	}
1040	"-visible" {
1041	if { [llength $args] > 1 } {
1042	set dlist {}
1043	set args [lrange $args 1 end]
1044	foreach dataobj $args {
1045	if { [info exists _obj2ovride($dataobj-raise)] } {
1046	lappend dlist $dataobj
1047	}
1048	}
1049	} else {
1050	set dlist [get -visible]
1051	}
1052	}
1053	default {
1054	set dlist $args
1055	}
1056	}
1057	set rlist ""
1058	foreach dataobj $dlist {
1059	foreach comp [$dataobj components] {
1060	set tag $dataobj-$comp
1061	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1062	lappend rlist $tag
1063	}
1064	}
1065	}
1066	return $rlist
1067	}
1068
1069	# ----------------------------------------------------------------------
1070	# USAGE: Zoom in
1071	# USAGE: Zoom out
1072	# USAGE: Zoom reset
1073	#
1074	# Called automatically when the user clicks on one of the zoom
1075	# controls for this widget. Changes the zoom for the current view.
1076	# ----------------------------------------------------------------------
1077	itcl::body Rappture::VtkSurfaceViewer::Zoom {option} {
1078	switch -- $option {
1079	"in" {
1080	set _view(zoom) [expr {$_view(zoom)*1.25}]
1081	SendCmd "camera zoom $_view(zoom)"
1082	}
1083	"out" {
1084	set _view(zoom) [expr {$_view(zoom)*0.8}]
1085	SendCmd "camera zoom $_view(zoom)"
1086	}
1087	"reset" {
1088	array set _view {
1089	qw 0.853553
1090	qx -0.353553
1091	qy 0.353553
1092	qz 0.146447
1093	zoom 1.0
1094	xpan 0
1095	ypan 0
1096	}
1097	if { $_first != "" } {
1098	set location [$_first hints camera]
1099	if { $location != "" } {
1100	array set _view $location
1101	}
1102	}
1103	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1104	$_arcball quaternion $q
1105	DoRotate
1106	SendCmd "camera reset"
1107	}
1108	}
1109	}
1110
1111	itcl::body Rappture::VtkSurfaceViewer::PanCamera {} {
1112	set x $_view(xpan)
1113	set y $_view(ypan)
1114	SendCmd "camera pan $x $y"
1115	}
1116
1117
1118	# ----------------------------------------------------------------------
1119	# USAGE: Rotate click <x> <y>
1120	# USAGE: Rotate drag <x> <y>
1121	# USAGE: Rotate release <x> <y>
1122	#
1123	# Called automatically when the user clicks/drags/releases in the
1124	# plot area. Moves the plot according to the user's actions.
1125	# ----------------------------------------------------------------------
1126	itcl::body Rappture::VtkSurfaceViewer::Rotate {option x y} {
1127	switch -- $option {
1128	"click" {
1129	$itk_component(view) configure -cursor fleur
1130	set _click(x) $x
1131	set _click(y) $y
1132	}
1133	"drag" {
1134	if {[array size _click] == 0} {
1135	Rotate click $x $y
1136	} else {
1137	set w [winfo width $itk_component(view)]
1138	set h [winfo height $itk_component(view)]
1139	if {$w <= 0 \|\| $h <= 0} {
1140	return
1141	}
1142
1143	if {[catch {
1144	# this fails sometimes for no apparent reason
1145	set dx [expr {double($x-$_click(x))/$w}]
1146	set dy [expr {double($y-$_click(y))/$h}]
1147	}]} {
1148	return
1149	}
1150	if { $dx == 0 && $dy == 0 } {
1151	return
1152	}
1153	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1154	EventuallyRotate $q
1155	set _click(x) $x
1156	set _click(y) $y
1157	}
1158	}
1159	"release" {
1160	Rotate drag $x $y
1161	$itk_component(view) configure -cursor ""
1162	catch {unset _click}
1163	}
1164	default {
1165	error "bad option \"$option\": should be click, drag, release"
1166	}
1167	}
1168	}
1169
1170	itcl::body Rappture::VtkSurfaceViewer::Pick {x y} {
1171	foreach tag [CurrentDatasets -visible] {
1172	SendCmdNoSplash "dataset getscalar pixel $x $y $tag"
1173	}
1174	}
1175
1176	# ----------------------------------------------------------------------
1177	# USAGE: $this Pan click x y
1178	# $this Pan drag x y
1179	# $this Pan release x y
1180	#
1181	# Called automatically when the user clicks on one of the zoom
1182	# controls for this widget. Changes the zoom for the current view.
1183	# ----------------------------------------------------------------------
1184	itcl::body Rappture::VtkSurfaceViewer::Pan {option x y} {
1185	switch -- $option {
1186	"set" {
1187	set w [winfo width $itk_component(view)]
1188	set h [winfo height $itk_component(view)]
1189	set x [expr $x / double($w)]
1190	set y [expr $y / double($h)]
1191	set _view(xpan) [expr $_view(xpan) + $x]
1192	set _view(ypan) [expr $_view(ypan) + $y]
1193	PanCamera
1194	return
1195	}
1196	"click" {
1197	set _click(x) $x
1198	set _click(y) $y
1199	$itk_component(view) configure -cursor hand1
1200	}
1201	"drag" {
1202	if { ![info exists _click(x)] } {
1203	set _click(x) $x
1204	}
1205	if { ![info exists _click(y)] } {
1206	set _click(y) $y
1207	}
1208	set w [winfo width $itk_component(view)]
1209	set h [winfo height $itk_component(view)]
1210	set dx [expr ($_click(x) - $x)/double($w)]
1211	set dy [expr ($_click(y) - $y)/double($h)]
1212	set _click(x) $x
1213	set _click(y) $y
1214	set _view(xpan) [expr $_view(xpan) - $dx]
1215	set _view(ypan) [expr $_view(ypan) - $dy]
1216	PanCamera
1217	}
1218	"release" {
1219	Pan drag $x $y
1220	$itk_component(view) configure -cursor ""
1221	}
1222	default {
1223	error "unknown option \"$option\": should set, click, drag, or release"
1224	}
1225	}
1226	}
1227
1228	# ----------------------------------------------------------------------
1229	# USAGE: InitSettings <what> ?<value>?
1230	#
1231	# Used internally to update rendering settings whenever parameters
1232	# change in the popup settings panel. Sends the new settings off
1233	# to the back end.
1234	# ----------------------------------------------------------------------
1235	itcl::body Rappture::VtkSurfaceViewer::InitSettings { args } {
1236	foreach spec $args {
1237	if { [info exists _settings($_first-$spec)] } {
1238	# Reset global setting with dataobj specific setting
1239	set _settings($spec) $_settings($_first-$spec)
1240	}
1241	AdjustSetting $spec
1242	}
1243	}
1244
1245	#
1246	# AdjustSetting --
1247	#
1248	# Changes/updates a specific setting in the widget. There are
1249	# usually user-setable option. Commands are sent to the render
1250	# server.
1251	#
1252	itcl::body Rappture::VtkSurfaceViewer::AdjustSetting {what {value ""}} {
1253	if { ![isconnected] } {
1254	return
1255	}
1256	switch -- $what {
1257	"-background" {
1258	set bgcolor [$itk_component(background) value]
1259	array set fgcolors {
1260	"black" "white"
1261	"white" "black"
1262	"grey" "black"
1263	}
1264	configure -plotbackground $bgcolor \
1265	-plotforeground $fgcolors($bgcolor)
1266	$itk_component(view) delete "legend"
1267	DrawLegend
1268	}
1269	"-axesvisible" {
1270	set bool $_settings($what)
1271	SendCmd "axis visible all $bool"
1272	}
1273	"-axislabels" {
1274	set bool $_settings($what)
1275	SendCmd "axis labels all $bool"
1276	}
1277	"-axisminorticks" {
1278	set bool $_settings($what)
1279	SendCmd "axis minticks all $bool"
1280	}
1281	"-xaxisgrid" - "-yaxisgrid" - "-zaxisgrid" {
1282	set axis [string tolower [string range $what 1 1]]
1283	set bool $_settings($what)
1284	SendCmd "axis grid $axis $bool"
1285	}
1286	"-axismode" {
1287	set mode [$itk_component(axisMode) value]
1288	set mode [$itk_component(axisMode) translate $mode]
1289	set _settings($what) $mode
1290	SendCmd "axis flymode $mode"
1291	}
1292	"-colormap" {
1293	set _changed($what) 1
1294	StartBufferingCommands
1295	set color [$itk_component(colormap) value]
1296	set _settings($what) $color
1297	if { $color == "none" } {
1298	if { $_settings(-colormapvisible) } {
1299	SendCmd "contour2d colormode constant {}"
1300	SendCmd "polydata colormode constant {}"
1301	set _settings(-colormapvisible) 0
1302	}
1303	} else {
1304	if { !$_settings(-colormapvisible) } {
1305	#SendCmd "contour2d colormode $_colorMode $_curFldName"
1306	SendCmd "polydata colormode $_colorMode $_curFldName"
1307	set _settings(-colormapvisible) 1
1308	}
1309	SetCurrentColormap $color
1310	if {$_settings(-colormapdiscrete)} {
1311	set numColors [expr $_settings(-numcontours) + 1]
1312	SendCmd "colormap res $numColors $color"
1313	}
1314	}
1315	StopBufferingCommands
1316	EventuallyRequestLegend
1317	}
1318	"-colormapdiscrete" {
1319	set bool $_settings($what)
1320	set numColors [expr $_settings(-numcontours) + 1]
1321	StartBufferingCommands
1322	if {$bool} {
1323	SendCmd "colormap res $numColors"
1324	# Discrete colormap requires preinterp on
1325	SendCmd "polydata preinterp on"
1326	} else {
1327	SendCmd "colormap res default"
1328	# FIXME: add setting for preinterp (default on)
1329	SendCmd "polydata preinterp on"
1330	}
1331	StopBufferingCommands
1332	EventuallyRequestLegend
1333	}
1334	"-numcontours" {
1335	set _settings($what) [$itk_component(numcontours) value]
1336	set _currentNumContours $_settings($what)
1337	UpdateContourList
1338	set _changed($what) 1
1339	SendCmd "contour2d contourlist [list $_contourList]"
1340	if {$_settings(-colormapdiscrete)} {
1341	set numColors [expr $_settings($what) + 1]
1342	SendCmd "colormap res $numColors"
1343	EventuallyRequestLegend
1344	} else {
1345	DrawLegend
1346	}
1347	}
1348	"-surfacewireframe" {
1349	set bool $_settings($what)
1350	SendCmd "polydata wireframe $bool"
1351	}
1352	"-isolinesvisible" {
1353	set bool $_settings($what)
1354	SendCmd "contour2d visible $bool"
1355	DrawLegend
1356	}
1357	"-surfacevisible" {
1358	set bool $_settings($what)
1359	SendCmd "polydata visible $bool"
1360	if { $bool } {
1361	Rappture::Tooltip::for $itk_component(surface) \
1362	"Hide the surface"
1363	} else {
1364	Rappture::Tooltip::for $itk_component(surface) \
1365	"Show the surface"
1366	}
1367	DrawLegend
1368	}
1369	"-surfacelighting" {
1370	set bool $_settings($what)
1371	SendCmd "polydata lighting $bool"
1372	}
1373	"-surfaceedges" {
1374	set bool $_settings($what)
1375	SendCmd "polydata edges $bool"
1376	}
1377	"-outline" {
1378	set bool $_settings($what)
1379	SendCmd "outline visible $bool"
1380	}
1381	"-isolinecolor" {
1382	set color [$itk_component(isolineColor) value]
1383	set _settings($what) $color
1384	SendCmd "contour2d linecolor [Color2RGB $color]"
1385	DrawLegend
1386	}
1387	"-surfaceopacity" {
1388	set val $_settings($what)
1389	set sval [expr { 0.01 * double($val) }]
1390	SendCmd "polydata opacity $sval"
1391	}
1392	"-field" {
1393	set label [$itk_component(field) value]
1394	set fname [$itk_component(field) translate $label]
1395	set _settings($what) $fname
1396	if { [info exists _fields($fname)] } {
1397	foreach { label units components } $_fields($fname) break
1398	if { $components > 1 } {
1399	set _colorMode vmag
1400	} else {
1401	set _colorMode scalar
1402	}
1403	set _curFldName $fname
1404	set _curFldLabel $label
1405	} else {
1406	puts stderr "unknown field \"$fname\""
1407	return
1408	}
1409	SendCmd "dataset scalar $_curFldName"
1410	if { ![info exists _limits($_curFldName)] } {
1411	SendCmd "dataset maprange all"
1412	} else {
1413	SendCmd "dataset maprange explicit $_limits($_curFldName) $_curFldName"
1414	}
1415	#SendCmd "contour2d colormode $_colorMode $_curFldName"
1416	SendCmd "polydata colormode $_colorMode $_curFldName"
1417	SendCmd "camera reset"
1418	UpdateContourList
1419	DrawLegend
1420	}
1421	"-legendvisible" {
1422	if { !$_settings($what) } {
1423	$itk_component(view) delete legend
1424	}
1425	DrawLegend
1426	}
1427	default {
1428	error "don't know how to fix $what"
1429	}
1430	}
1431	}
1432
1433
1434	#
1435	# RequestLegend --
1436	#
1437	# Request a new legend from the server. The size of the legend
1438	# is determined from the height of the canvas.
1439	#
1440	# This should be called when
1441	# 1. A new current colormap is set.
1442	# 2. Window is resized.
1443	# 3. The limits of the data have changed. (Just need a redraw).
1444	# 4. Number of isolines have changed. (Just need a redraw).
1445	# 5. Legend becomes visible (Just need a redraw).
1446	#
1447	itcl::body Rappture::VtkSurfaceViewer::RequestLegend {} {
1448	set _legendPending 0
1449	if { ![info exists _fields($_curFldName)] } {
1450	return
1451	}
1452	set fname $_curFldName
1453	set font "Arial 8"
1454	set lineht [font metrics $font -linespace]
1455	set w 12
1456	set h [expr {$_height - 2 * ($lineht + 2)}]
1457	if { $h < 1 } {
1458	return
1459	}
1460	if { [string match "component*" $fname] } {
1461	set title ""
1462	} else {
1463	if { [info exists _fields($fname)] } {
1464	foreach { title units } $_fields($fname) break
1465	if { $units != "" } {
1466	set title [format "%s (%s)" $title $units]
1467	}
1468	} else {
1469	set title $fname
1470	}
1471	}
1472	# If there's a title too, subtract one more line
1473	if { $title != "" } {
1474	incr h -$lineht
1475	}
1476	# Set the legend on the first heightmap dataset.
1477	if { $_currentColormap != "" } {
1478	set cmap $_currentColormap
1479	SendCmdNoWait "legend $cmap scalar $_curFldName {} $w $h 0"
1480	}
1481	}
1482
1483	# ----------------------------------------------------------------------
1484	# CONFIGURATION OPTION: -plotbackground
1485	# ----------------------------------------------------------------------
1486	itcl::configbody Rappture::VtkSurfaceViewer::plotbackground {
1487	if { [isconnected] } {
1488	set rgb [Color2RGB $itk_option(-plotbackground)]
1489	SendCmd "screen bgcolor $rgb"
1490	}
1491	}
1492
1493	# ----------------------------------------------------------------------
1494	# CONFIGURATION OPTION: -plotforeground
1495	# ----------------------------------------------------------------------
1496	itcl::configbody Rappture::VtkSurfaceViewer::plotforeground {
1497	if { [isconnected] } {
1498	set rgb [Color2RGB $itk_option(-plotforeground)]
1499	SendCmd "axis color all $rgb"
1500	SendCmd "outline color $rgb"
1501	}
1502	}
1503
1504	itcl::body Rappture::VtkSurfaceViewer::limits { dataobj } {
1505	foreach { limits(xmin) limits(xmax) } [$dataobj limits x] break
1506	foreach { limits(ymin) limits(ymax) } [$dataobj limits y] break
1507	foreach { limits(zmin) limits(zmax) } [$dataobj limits z] break
1508	foreach { limits(vmin) limits(vmax) } [$dataobj limits v] break
1509	return [array get limits]
1510	}
1511
1512	itcl::body Rappture::VtkSurfaceViewer::BuildSurfaceTab {} {
1513
1514	set fg [option get $itk_component(hull) font Font]
1515	#set bfg [option get $itk_component(hull) boldFont Font]
1516
1517	set inner [$itk_component(main) insert end \
1518	-title "Surface Settings" \
1519	-icon [Rappture::icon volume-on]]
1520	$inner configure -borderwidth 4
1521
1522	checkbutton $inner.surface \
1523	-text "Surface" \
1524	-variable [itcl::scope _settings(-surfacevisible)] \
1525	-command [itcl::code $this AdjustSetting -surfacevisible] \
1526	-font "Arial 9"
1527
1528	checkbutton $inner.isolines \
1529	-text "Isolines" \
1530	-variable [itcl::scope _settings(-isolinesvisible)] \
1531	-command [itcl::code $this AdjustSetting -isolinesvisible] \
1532	-font "Arial 9"
1533
1534	checkbutton $inner.colormapDiscrete \
1535	-text "Discrete Colormap" \
1536	-variable [itcl::scope _settings(-colormapdiscrete)] \
1537	-command [itcl::code $this AdjustSetting -colormapdiscrete] \
1538	-font "Arial 9"
1539
1540	checkbutton $inner.wireframe \
1541	-text "Wireframe" \
1542	-variable [itcl::scope _settings(-surfacewireframe)] \
1543	-command [itcl::code $this AdjustSetting -surfacewireframe] \
1544	-font "Arial 9"
1545
1546	checkbutton $inner.lighting \
1547	-text "Enable Lighting" \
1548	-variable [itcl::scope _settings(-surfacelighting)] \
1549	-command [itcl::code $this AdjustSetting -surfacelighting] \
1550	-font "Arial 9"
1551
1552	checkbutton $inner.edges \
1553	-text "Edges" \
1554	-variable [itcl::scope _settings(-surfaceedges)] \
1555	-command [itcl::code $this AdjustSetting -surfaceedges] \
1556	-font "Arial 9"
1557
1558	checkbutton $inner.outline \
1559	-text "Outline" \
1560	-variable [itcl::scope _settings(-outline)] \
1561	-command [itcl::code $this AdjustSetting -outline] \
1562	-font "Arial 9"
1563
1564	checkbutton $inner.legend \
1565	-text "Legend" \
1566	-variable [itcl::scope _settings(-legendvisible)] \
1567	-command [itcl::code $this AdjustSetting -legendvisible] \
1568	-font "Arial 9"
1569
1570	label $inner.linecolor_l -text "Isolines" -font "Arial 9"
1571	itk_component add isolineColor {
1572	Rappture::Combobox $inner.linecolor -width 10 -editable 0
1573	}
1574	$inner.linecolor choices insert end \
1575	"black" "black" \
1576	"blue" "blue" \
1577	"cyan" "cyan" \
1578	"green" "green" \
1579	"grey" "grey" \
1580	"magenta" "magenta" \
1581	"orange" "orange" \
1582	"red" "red" \
1583	"white" "white" \
1584	"none" "none"
1585
1586	$itk_component(isolineColor) value "white"
1587	bind $inner.linecolor <<Value>> \
1588	[itcl::code $this AdjustSetting -isolinecolor]
1589
1590	label $inner.background_l -text "Background" -font "Arial 9"
1591	itk_component add background {
1592	Rappture::Combobox $inner.background -width 10 -editable 0
1593	}
1594	$inner.background choices insert end \
1595	"black" "black" \
1596	"white" "white" \
1597	"grey" "grey"
1598
1599	$itk_component(background) value $_settings(-background)
1600	bind $inner.background <<Value>> \
1601	[itcl::code $this AdjustSetting -background]
1602
1603	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1604	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1605	-variable [itcl::scope _settings(-surfaceopacity)] \
1606	-width 10 \
1607	-showvalue off \
1608	-command [itcl::code $this AdjustSetting -surfaceopacity]
1609
1610	itk_component add field_l {
1611	label $inner.field_l -text "Field" -font "Arial 9"
1612	} {
1613	ignore -font
1614	}
1615	itk_component add field {
1616	Rappture::Combobox $inner.field -width 10 -editable 0
1617	}
1618	bind $inner.field <<Value>> \
1619	[itcl::code $this AdjustSetting -field]
1620
1621	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1622	itk_component add colormap {
1623	Rappture::Combobox $inner.colormap -width 10 -editable 0
1624	}
1625	$inner.colormap choices insert end [GetColormapList]
1626
1627	$itk_component(colormap) value "BCGYR"
1628	bind $inner.colormap <<Value>> \
1629	[itcl::code $this AdjustSetting -colormap]
1630
1631	label $inner.numcontours_l -text "Number of Isolines" -font "Arial 9"
1632	itk_component add numcontours {
1633	Rappture::Spinint $inner.numcontours \
1634	-min 0 -max 50 -font "arial 9"
1635	}
1636	$itk_component(numcontours) value $_settings(-numcontours)
1637	bind $itk_component(numcontours) <<Value>> \
1638	[itcl::code $this AdjustSetting -numcontours]
1639
1640	blt::table $inner \
1641	0,0 $inner.field_l -anchor w -pady 2 \
1642	0,1 $inner.field -anchor w -pady 2 -fill x \
1643	1,0 $inner.colormap_l -anchor w -pady 2 \
1644	1,1 $inner.colormap -anchor w -pady 2 -fill x \
1645	2,0 $inner.linecolor_l -anchor w -pady 2 \
1646	2,1 $inner.linecolor -anchor w -pady 2 -fill x \
1647	3,0 $inner.background_l -anchor w -pady 2 \
1648	3,1 $inner.background -anchor w -pady 2 -fill x \
1649	4,0 $inner.numcontours_l -anchor w -pady 2 \
1650	4,1 $inner.numcontours -anchor w -pady 2 \
1651	5,0 $inner.colormapDiscrete -anchor w -pady 2 -cspan 2 \
1652	6,0 $inner.isolines -anchor w -pady 2 -cspan 2 \
1653	7,0 $inner.wireframe -anchor w -pady 2 -cspan 2 \
1654	8,0 $inner.lighting -anchor w -pady 2 -cspan 2 \
1655	9,0 $inner.edges -anchor w -pady 2 -cspan 2 \
1656	10,0 $inner.outline -anchor w -pady 2 -cspan 2 \
1657	11,0 $inner.legend -anchor w -pady 2 \
1658	12,0 $inner.opacity_l -anchor w -pady 2 \
1659	12,1 $inner.opacity -fill x -pady 2 -fill x \
1660
1661	blt::table configure $inner r* c* -resize none
1662	blt::table configure $inner r13 c1 -resize expand
1663	}
1664
1665	itcl::body Rappture::VtkSurfaceViewer::BuildAxisTab {} {
1666
1667	set fg [option get $itk_component(hull) font Font]
1668	#set bfg [option get $itk_component(hull) boldFont Font]
1669
1670	set inner [$itk_component(main) insert end \
1671	-title "Axis Settings" \
1672	-icon [Rappture::icon axis2]]
1673	$inner configure -borderwidth 4
1674
1675	checkbutton $inner.visible \
1676	-text "Axes" \
1677	-variable [itcl::scope _settings(-axesvisible)] \
1678	-command [itcl::code $this AdjustSetting -axesvisible] \
1679	-font "Arial 9"
1680
1681	checkbutton $inner.labels \
1682	-text "Axis Labels" \
1683	-variable [itcl::scope _settings(-axislabels)] \
1684	-command [itcl::code $this AdjustSetting -axislabels] \
1685	-font "Arial 9"
1686	label $inner.grid_l -text "Grid" -font "Arial 9"
1687	checkbutton $inner.xgrid \
1688	-text "X" \
1689	-variable [itcl::scope _settings(-xaxisgrid)] \
1690	-command [itcl::code $this AdjustSetting -xaxisgrid] \
1691	-font "Arial 9"
1692	checkbutton $inner.ygrid \
1693	-text "Y" \
1694	-variable [itcl::scope _settings(-yaxisgrid)] \
1695	-command [itcl::code $this AdjustSetting -yaxisgrid] \
1696	-font "Arial 9"
1697	checkbutton $inner.zgrid \
1698	-text "Z" \
1699	-variable [itcl::scope _settings(-zaxisgrid)] \
1700	-command [itcl::code $this AdjustSetting -zaxisgrid] \
1701	-font "Arial 9"
1702	checkbutton $inner.minorticks \
1703	-text "Minor Ticks" \
1704	-variable [itcl::scope _settings(-axisminorticks)] \
1705	-command [itcl::code $this AdjustSetting -axisminorticks] \
1706	-font "Arial 9"
1707
1708	label $inner.mode_l -text "Mode" -font "Arial 9"
1709
1710	itk_component add axisMode {
1711	Rappture::Combobox $inner.mode -width 10 -editable 0
1712	}
1713	$inner.mode choices insert end \
1714	"static_triad" "static" \
1715	"closest_triad" "closest" \
1716	"furthest_triad" "farthest" \
1717	"outer_edges" "outer"
1718	$itk_component(axisMode) value "static"
1719	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting -axismode]
1720
1721	blt::table $inner \
1722	0,0 $inner.visible -anchor w -cspan 4 \
1723	1,0 $inner.labels -anchor w -cspan 4 \
1724	2,0 $inner.minorticks -anchor w -cspan 4 \
1725	4,0 $inner.grid_l -anchor w \
1726	4,1 $inner.xgrid -anchor w \
1727	4,2 $inner.ygrid -anchor w \
1728	4,3 $inner.zgrid -anchor w \
1729	5,0 $inner.mode_l -anchor w -padx { 2 0 } \
1730	5,1 $inner.mode -fill x -cspan 3
1731
1732	blt::table configure $inner r* c* -resize none
1733	blt::table configure $inner r7 c6 -resize expand
1734	blt::table configure $inner r3 -height 0.125i
1735	}
1736
1737	itcl::body Rappture::VtkSurfaceViewer::BuildCameraTab {} {
1738	set inner [$itk_component(main) insert end \
1739	-title "Camera Settings" \
1740	-icon [Rappture::icon camera]]
1741	$inner configure -borderwidth 4
1742
1743	label $inner.view_l -text "view" -font "Arial 9"
1744	set f [frame $inner.view]
1745	foreach side { front back left right top bottom } {
1746	button $f.$side -image [Rappture::icon view$side] \
1747	-command [itcl::code $this SetOrientation $side]
1748	Rappture::Tooltip::for $f.$side "Change the view to $side"
1749	pack $f.$side -side left
1750	}
1751
1752	blt::table $inner \
1753	0,0 $inner.view_l -anchor e -pady 2 \
1754	0,1 $inner.view -anchor w -pady 2
1755
1756	set labels { qx qy qz qw xpan ypan zoom }
1757	set row 1
1758	foreach tag $labels {
1759	label $inner.${tag}label -text $tag -font "Arial 9"
1760	entry $inner.${tag} -font "Arial 9" -bg white \
1761	-textvariable [itcl::scope _view($tag)]
1762	bind $inner.${tag} <KeyPress-Return> \
1763	[itcl::code $this camera set ${tag}]
1764	blt::table $inner \
1765	$row,0 $inner.${tag}label -anchor e -pady 2 \
1766	$row,1 $inner.${tag} -anchor w -pady 2
1767	blt::table configure $inner r$row -resize none
1768	incr row
1769	}
1770	checkbutton $inner.ortho \
1771	-text "Orthographic Projection" \
1772	-variable [itcl::scope _view(ortho)] \
1773	-command [itcl::code $this camera set ortho] \
1774	-font "Arial 9"
1775	blt::table $inner \
1776	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1777	blt::table configure $inner r$row -resize none
1778	incr row
1779
1780	blt::table configure $inner c* r* -resize none
1781	blt::table configure $inner c2 -resize expand
1782	blt::table configure $inner r$row -resize expand
1783	}
1784
1785	#
1786	# camera --
1787	#
1788	itcl::body Rappture::VtkSurfaceViewer::camera {option args} {
1789	switch -- $option {
1790	"show" {
1791	puts [array get _view]
1792	}
1793	"set" {
1794	set who [lindex $args 0]
1795	set x $_view($who)
1796	set code [catch { string is double $x } result]
1797	if { $code != 0 \|\| !$result } {
1798	return
1799	}
1800	switch -- $who {
1801	"ortho" {
1802	if {$_view(ortho)} {
1803	SendCmd "camera mode ortho"
1804	} else {
1805	SendCmd "camera mode persp"
1806	}
1807	}
1808	"xpan" - "ypan" {
1809	PanCamera
1810	}
1811	"qx" - "qy" - "qz" - "qw" {
1812	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1813	$_arcball quaternion $q
1814	EventuallyRotate $q
1815	}
1816	"zoom" {
1817	SendCmd "camera zoom $_view(zoom)"
1818	}
1819	}
1820	}
1821	}
1822	}
1823
1824	itcl::body Rappture::VtkSurfaceViewer::GetVtkData { args } {
1825	set bytes ""
1826	foreach dataobj [get] {
1827	foreach cname [$dataobj components] {
1828	set tag $dataobj-$cname
1829	set contents [$dataobj vtkdata $cname]
1830	append bytes "$contents\n"
1831	}
1832	}
1833	return [list .vtk $bytes]
1834	}
1835
1836	itcl::body Rappture::VtkSurfaceViewer::GetImage { args } {
1837	if { [image width $_image(download)] > 0 &&
1838	[image height $_image(download)] > 0 } {
1839	set bytes [$_image(download) data -format "jpeg -quality 100"]
1840	set bytes [Rappture::encoding::decode -as b64 $bytes]
1841	return [list .jpg $bytes]
1842	}
1843	return ""
1844	}
1845
1846	itcl::body Rappture::VtkSurfaceViewer::BuildDownloadPopup { popup command } {
1847	Rappture::Balloon $popup \
1848	-title "[Rappture::filexfer::label downloadWord] as..."
1849	set inner [$popup component inner]
1850	label $inner.summary -text "" -anchor w
1851	radiobutton $inner.vtk_button -text "VTK data file" \
1852	-variable [itcl::scope _downloadPopup(format)] \
1853	-font "Arial 9 " \
1854	-value vtk
1855	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
1856	radiobutton $inner.image_button -text "Image File" \
1857	-variable [itcl::scope _downloadPopup(format)] \
1858	-font "Arial 9 " \
1859	-value image
1860	Rappture::Tooltip::for $inner.image_button \
1861	"Save as digital image."
1862
1863	button $inner.ok -text "Save" \
1864	-highlightthickness 0 -pady 2 -padx 3 \
1865	-command $command \
1866	-compound left \
1867	-image [Rappture::icon download]
1868
1869	button $inner.cancel -text "Cancel" \
1870	-highlightthickness 0 -pady 2 -padx 3 \
1871	-command [list $popup deactivate] \
1872	-compound left \
1873	-image [Rappture::icon cancel]
1874
1875	blt::table $inner \
1876	0,0 $inner.summary -cspan 2 \
1877	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
1878	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
1879	4,1 $inner.cancel -width .9i -fill y \
1880	4,0 $inner.ok -padx 2 -width .9i -fill y
1881	blt::table configure $inner r3 -height 4
1882	blt::table configure $inner r4 -pady 4
1883	raise $inner.image_button
1884	$inner.vtk_button invoke
1885	return $inner
1886	}
1887
1888	itcl::body Rappture::VtkSurfaceViewer::SetObjectStyle { dataobj comp } {
1889	# Parse style string.
1890	set tag $dataobj-$comp
1891	array set style {
1892	-color BCGYR
1893	-edgecolor black
1894	-edges 0
1895	-isolinecolor white
1896	-isolinesvisible 0
1897	-levels 10
1898	-lighting 1
1899	-linewidth 1.0
1900	-opacity 1.0
1901	-outline 0
1902	-surfacevisible 1
1903	-wireframe 0
1904	}
1905	array set style [$dataobj style $comp]
1906	if { $dataobj != $_first \|\| $style(-levels) == 1 } {
1907	set style(-opacity) 1
1908	}
1909
1910	# This is too complicated. We want to set the colormap, number of
1911	# isolines and opacity for the dataset. They can be the default values,
1912	# the style hints loaded with the dataset, or set by user controls. As
1913	# datasets get loaded, they first use the defaults that are overidden
1914	# by the style hints. If the user changes the global controls, then that
1915	# overrides everything else. I don't know what it means when global
1916	# controls are specified as style hints by each dataset. It complicates
1917	# the code to handle aberrant cases.
1918
1919	if { $_changed(-surfaceopacity) } {
1920	set style(-opacity) [expr $_settings(-surfaceopacity) * 0.01]
1921	}
1922	if { $_changed(-numcontours) } {
1923	set style(-levels) $_settings(-numcontours)
1924	}
1925	if { $_changed(-colormap) } {
1926	set style(-color) $_settings(-colormap)
1927	}
1928	if { $_currentColormap == "" } {
1929	SetCurrentColormap $style(-color)
1930	$itk_component(colormap) value $style(-color)
1931	}
1932	if { $_currentNumContours != $style(-levels) } {
1933	set _currentNumContours $style(-levels)
1934	set _settings(-numcontours) $_currentNumContours
1935	$itk_component(numcontours) value $_currentNumContours
1936	UpdateContourList
1937	DrawLegend
1938	}
1939	set _settings(-isolinesvisible) $style(-isolinesvisible)
1940	set _settings(-surfacevisible) $style(-surfacevisible)
1941
1942	SendCmd "outline add $tag"
1943	SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
1944	SendCmd "outline visible $style(-outline) $tag"
1945	set _settings(-outline) $style(-outline)
1946
1947	SendCmd "polydata add $tag"
1948	SendCmd "polydata edges $style(-edges) $tag"
1949	set _settings(-surfaceedges) $style(-edges)
1950	#SendCmd "polydata color [Color2RGB $settings(-color)] $tag"
1951	SendCmd "polydata lighting $style(-lighting) $tag"
1952	set _settings(-surfacelighting) $style(-lighting)
1953	SendCmd "polydata linecolor [Color2RGB $style(-edgecolor)] $tag"
1954	SendCmd "polydata linewidth $style(-linewidth) $tag"
1955	SendCmd "polydata opacity $style(-opacity) $tag"
1956	set _settings(-surfaceopacity) [expr $style(-opacity) * 100.0]
1957	SetCurrentColormap $style(-color)
1958	SendCmd "polydata wireframe $style(-wireframe) $tag"
1959	set _settings(-surfacewireframe) $style(-wireframe)
1960
1961	SendCmd [list contour2d add contourlist $_contourList $tag]
1962	SendCmd "contour2d colormode constant {} $tag"
1963	SendCmd "contour2d color [Color2RGB $style(-isolinecolor)] $tag"
1964	}
1965
1966	itcl::body Rappture::VtkSurfaceViewer::IsValidObject { dataobj } {
1967	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
1968	return 0
1969	}
1970	return 1
1971	}
1972
1973	#
1974	# EnterLegend --
1975	#
1976	itcl::body Rappture::VtkSurfaceViewer::EnterLegend { x y } {
1977	SetLegendTip $x $y
1978	}
1979
1980	#
1981	# MotionLegend --
1982	#
1983	itcl::body Rappture::VtkSurfaceViewer::MotionLegend { x y } {
1984	Rappture::Tooltip::tooltip cancel
1985	set c $itk_component(view)
1986	set cw [winfo width $c]
1987	set ch [winfo height $c]
1988	if { $x >= 0 && $x < $cw && $y >= 0 && $y < $ch } {
1989	SetLegendTip $x $y
1990	}
1991	}
1992
1993	#
1994	# LeaveLegend --
1995	#
1996	itcl::body Rappture::VtkSurfaceViewer::LeaveLegend { } {
1997	Rappture::Tooltip::tooltip cancel
1998	.rappturetooltip configure -icon ""
1999	}
2000
2001	#
2002	# SetLegendTip --
2003	#
2004	itcl::body Rappture::VtkSurfaceViewer::SetLegendTip { x y } {
2005	set fname $_curFldName
2006	set c $itk_component(view)
2007	set w [winfo width $c]
2008	set h [winfo height $c]
2009
2010	set font "Arial 8"
2011	set lineht [font metrics $font -linespace]
2012
2013	set ih [image height $_image(legend)]
2014	set iy [expr $y - ($lineht + 2)]
2015
2016	if { [string match "component*" $fname] } {
2017	set title ""
2018	} else {
2019	if { [info exists _fields($fname)] } {
2020	foreach { title units } $_fields($fname) break
2021	if { $units != "" } {
2022	set title [format "%s (%s)" $title $units]
2023	}
2024	} else {
2025	set title $fname
2026	}
2027	}
2028	# If there's a legend title, increase the offset by the line height.
2029	if { $title != "" } {
2030	incr iy -$lineht
2031	}
2032	# Make a swatch of the selected color
2033	if { [catch { $_image(legend) get 10 $iy } pixel] != 0 } {
2034	return
2035	}
2036	if { ![info exists _image(swatch)] } {
2037	set _image(swatch) [image create photo -width 24 -height 24]
2038	}
2039	set color [eval format "\#%02x%02x%02x" $pixel]
2040	$_image(swatch) put black -to 0 0 23 23
2041	$_image(swatch) put $color -to 1 1 22 22
2042	.rappturetooltip configure -icon $_image(swatch)
2043
2044	# Compute the value of the point
2045	if { [info exists _limits($_curFldName)] } {
2046	foreach { vmin vmax } $_limits($_curFldName) break
2047	set t [expr 1.0 - (double($iy) / double($ih-1))]
2048	set value [expr $t * ($vmax - $vmin) + $vmin]
2049	} else {
2050	set value 0.0
2051	}
2052	set tx [expr $x + 15]
2053	set ty [expr $y - 5]
2054	if { [info exists _isolines($y)] } {
2055	Rappture::Tooltip::text $c [format "$title %g (isoline)" $_isolines($y)]
2056	} else {
2057	Rappture::Tooltip::text $c [format "$title %g" $value]
2058	}
2059	Rappture::Tooltip::tooltip show $c +$tx,+$ty
2060	}
2061
2062	#
2063	# ReceiveLegend --
2064	#
2065	# Invoked automatically whenever the "legend" command comes in from
2066	# the rendering server. Indicates that binary image data with the
2067	# specified <size> will follow.
2068	#
2069	itcl::body Rappture::VtkSurfaceViewer::ReceiveLegend { colormap title min max size } {
2070	#puts stderr "ReceiveLegend colormap=$colormap title=$title range=$min,$max size=$size"
2071	set _title $title
2072	regsub {\(mag\)} $title "" _title
2073	if { [IsConnected] } {
2074	set bytes [ReceiveBytes $size]
2075	if { ![info exists _image(legend)] } {
2076	set _image(legend) [image create photo]
2077	}
2078	$_image(legend) configure -data $bytes
2079	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2080	if { [catch {DrawLegend} errs] != 0 } {
2081	global errorInfo
2082	puts stderr "errs=$errs errorInfo=$errorInfo"
2083	}
2084	}
2085	}
2086
2087	#
2088	# DrawLegend --
2089	#
2090	# Draws the legend in the own canvas on the right side of the plot area.
2091	#
2092	itcl::body Rappture::VtkSurfaceViewer::DrawLegend {} {
2093	set fname $_curFldName
2094	set c $itk_component(view)
2095	set w [winfo width $c]
2096	set h [winfo height $c]
2097	set font "Arial 8"
2098	set lineht [font metrics $font -linespace]
2099
2100	if { [string match "component*" $fname] } {
2101	set title ""
2102	} else {
2103	if { [info exists _fields($fname)] } {
2104	foreach { title units } $_fields($fname) break
2105	if { $units != "" } {
2106	set title [format "%s (%s)" $title $units]
2107	}
2108	} else {
2109	set title $fname
2110	}
2111	}
2112	set x [expr $w - 2]
2113	if { !$_settings(-legendvisible) } {
2114	$c delete legend
2115	return
2116	}
2117	if { [$c find withtag "legend"] == "" } {
2118	set y 2
2119	# If there's a legend title, create a text item for the title.
2120	$c create text $x $y \
2121	-anchor ne \
2122	-fill $itk_option(-plotforeground) -tags "title legend" \
2123	-font $font
2124	if { $title != "" } {
2125	incr y $lineht
2126	}
2127	$c create text $x $y \
2128	-anchor ne \
2129	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2130	-font $font
2131	incr y $lineht
2132	$c create image $x $y \
2133	-anchor ne \
2134	-image $_image(legend) -tags "colormap legend"
2135	$c create rectangle $x $y 1 1 \
2136	-fill "" -outline "" -tags "sensor legend"
2137	$c create text $x [expr {$h-2}] \
2138	-anchor se \
2139	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2140	-font $font
2141	$c bind sensor <Enter> [itcl::code $this EnterLegend %x %y]
2142	$c bind sensor <Leave> [itcl::code $this LeaveLegend]
2143	$c bind sensor <Motion> [itcl::code $this MotionLegend %x %y]
2144	}
2145	$c delete isoline
2146	set x2 $x
2147	set iw [image width $_image(legend)]
2148	set ih [image height $_image(legend)]
2149	set x1 [expr $x2 - ($iw*12)/10]
2150	set color $_settings(-isolinecolor)
2151	# Draw the isolines on the legend.
2152	array unset _isolines
2153	if { $color != "none" && [info exists _limits($_curFldName)] &&
2154	$_settings(-isolinesvisible) && $_settings(-numcontours) > 0 } {
2155
2156	foreach { vmin vmax } $_limits($_curFldName) break
2157	set range [expr double($vmax - $vmin)]
2158	if { $range <= 0.0 } {
2159	set range 1.0; # Min is greater or equal to max.
2160	}
2161	set tags "isoline legend"
2162	set offset [expr 2 + $lineht]
2163	if { $title != "" } {
2164	incr offset $lineht
2165	}
2166	foreach value $_contourList {
2167	set norm [expr 1.0 - (($value - $vmin) / $range)]
2168	set y1 [expr int(round(($norm * $ih) + $offset))]
2169	for { set off 0 } { $off < 3 } { incr off } {
2170	set _isolines([expr $y1 + $off]) $value
2171	set _isolines([expr $y1 - $off]) $value
2172	}
2173	$c create line $x1 $y1 $x2 $y1 -fill $color -tags $tags
2174	}
2175	}
2176
2177	$c bind title <ButtonPress> [itcl::code $this Combo post]
2178	$c bind title <Enter> [itcl::code $this Combo activate]
2179	$c bind title <Leave> [itcl::code $this Combo deactivate]
2180	# Reset the item coordinates according the current size of the plot.
2181	$c itemconfigure title -text $title
2182	if { [info exists _limits($_curFldName)] } {
2183	foreach { vmin vmax } $_limits($_curFldName) break
2184	$c itemconfigure vmin -text [format %g $vmin]
2185	$c itemconfigure vmax -text [format %g $vmax]
2186	}
2187	set y 2
2188	# If there's a legend title, move the title to the correct position
2189	if { $title != "" } {
2190	$c itemconfigure title -text $title
2191	$c coords title $x $y
2192	incr y $lineht
2193	$c raise title
2194	}
2195	$c coords vmax $x $y
2196	incr y $lineht
2197	$c coords colormap $x $y
2198	$c coords sensor [expr $x - $iw] $y $x [expr $y + $ih]
2199	$c raise sensor
2200	$c coords vmin $x [expr {$h - 2}]
2201	}
2202
2203	# ----------------------------------------------------------------------
2204	# USAGE: _dropdown post
2205	# USAGE: _dropdown unpost
2206	# USAGE: _dropdown select
2207	#
2208	# Used internally to handle the dropdown list for this combobox. The
2209	# post/unpost options are invoked when the list is posted or unposted
2210	# to manage the relief of the controlling button. The select option
2211	# is invoked whenever there is a selection from the list, to assign
2212	# the value back to the gauge.
2213	# ----------------------------------------------------------------------
2214	itcl::body Rappture::VtkSurfaceViewer::Combo {option} {
2215	set c $itk_component(view)
2216	switch -- $option {
2217	post {
2218	foreach { x1 y1 x2 y2 } [$c bbox title] break
2219	set cw [winfo width $itk_component(view)]
2220	set mw [winfo reqwidth $itk_component(fieldmenu)]
2221	set x1 [expr $cw - $mw]
2222	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2223	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2224	tk_popup $itk_component(fieldmenu) $x $y
2225	}
2226	activate {
2227	$c itemconfigure title -fill red
2228	}
2229	deactivate {
2230	$c itemconfigure title -fill $itk_option(-plotforeground)
2231	}
2232	invoke {
2233	$itk_component(field) value $_curFldLabel
2234	AdjustSetting -field
2235	}
2236	default {
2237	error "bad option \"$option\": should be post, unpost, select"
2238	}
2239	}
2240	}
2241
2242	#
2243	# SetCurrentColormap --
2244	#
2245	itcl::body Rappture::VtkSurfaceViewer::SetCurrentColormap { name } {
2246	# Keep track of the colormaps that we build.
2247	if { ![info exists _colormaps($name)] } {
2248	BuildColormap $name
2249	set _colormaps($name) 1
2250	}
2251	set _currentColormap $name
2252	SendCmd "contour2d colormap $_currentColormap"
2253	SendCmd "polydata colormap $_currentColormap"
2254	}
2255
2256	#
2257	# BuildColormap --
2258	#
2259	# Build the designated colormap on the server.
2260	#
2261	itcl::body Rappture::VtkSurfaceViewer::BuildColormap { name } {
2262	set cmap [ColorsToColormap $name]
2263	if { [llength $cmap] == 0 } {
2264	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
2265	}
2266	set wmap "0.0 1.0 1.0 1.0"
2267	SendCmd "colormap add $name { $cmap } { $wmap }"
2268	}
2269
2270	itcl::body Rappture::VtkSurfaceViewer::SetOrientation { side } {
2271	array set positions {
2272	front "1 0 0 0"
2273	back "0 0 1 0"
2274	left "0.707107 0 -0.707107 0"
2275	right "0.707107 0 0.707107 0"
2276	top "0.707107 -0.707107 0 0"
2277	bottom "0.707107 0.707107 0 0"
2278	}
2279	foreach name { qw qx qy qz } value $positions($side) {
2280	set _view($name) $value
2281	}
2282	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2283	$_arcball quaternion $q
2284	SendCmd "camera orient $q"
2285	SendCmd "camera reset"
2286	set _view(xpan) 0
2287	set _view(ypan) 0
2288	set _view(zoom) 1.0
2289	}
2290
2291	itcl::body Rappture::VtkSurfaceViewer::UpdateContourList {} {
2292	if { ![info exists _limits($_curFldName)] } {
2293	return
2294	}
2295	if { $_currentNumContours < 1 } {
2296	set _contourList ""
2297	return
2298	}
2299	foreach { vmin vmax } $_limits($_curFldName) break
2300	set v [blt::vector create \#auto]
2301	$v seq $vmin $vmax [expr $_currentNumContours+2]
2302	$v delete end 0
2303	set _contourList [$v range 0 end]
2304	blt::vector destroy $v
2305	}
2306

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