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source: branches/uq/gui/scripts/vtkimageviewer.tcl @ 4797

Last change on this file since 4797 was 4797, checked in by gah, 9 years ago
sync with 1.4-pre
File size: 76.7 KB

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1	# -- mode: tcl; indent-tabs-mode: nil --
2	# ----------------------------------------------------------------------
3	# COMPONENT: vtkimageviewer - Vtk image 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 *VtkImageViewer.width 4i widgetDefault
19	option add VtkImageViewercursor crosshair widgetDefault
20	option add *VtkImageViewer.height 4i widgetDefault
21	option add *VtkImageViewer.foreground black widgetDefault
22	option add *VtkImageViewer.controlBackground gray widgetDefault
23	option add *VtkImageViewer.controlDarkBackground #999999 widgetDefault
24	option add *VtkImageViewer.plotBackground black widgetDefault
25	option add *VtkImageViewer.plotForeground white widgetDefault
26	option add *VtkImageViewer.font \
27	--helvetica-medium-r-normal--12-* widgetDefault
28
29	# must use this name -- plugs into Rappture::resources::load
30	proc VtkImageViewer_init_resources {} {
31	Rappture::resources::register \
32	vtkvis_server Rappture::VtkImageViewer::SetServerList
33	}
34
35	itcl::class Rappture::VtkImageViewer {
36	inherit Rappture::VisViewer
37
38	itk_option define -plotforeground plotForeground Foreground ""
39	itk_option define -plotbackground plotBackground Background ""
40	itk_option define -mode mode Mode "vtkimage"
41
42	constructor { hostlist args } {
43	Rappture::VisViewer::constructor $hostlist
44	} {
45	# defined below
46	}
47	destructor {
48	# defined below
49	}
50	public proc SetServerList { namelist } {
51	Rappture::VisViewer::SetServerList "vtkvis" $namelist
52	}
53	public method add {dataobj {settings ""}}
54	public method camera {option args}
55	public method delete {args}
56	public method disconnect {}
57	public method download {option args}
58	public method get {args}
59	public method isconnected {}
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 AdjustMode {}
72	protected method InitSettings { args }
73	protected method Pan {option x y}
74	protected method Pick {x y}
75	protected method Rebuild {}
76	protected method ReceiveDataset { args }
77	protected method ReceiveImage { args }
78	protected method ReceiveLegend { colormap title min max size }
79	protected method Rotate {option x y}
80	protected method Zoom {option}
81
82	# The following methods are only used by this class.
83	private method BuildAxisTab {}
84	private method BuildCameraTab {}
85	private method BuildColormap { name }
86	private method BuildImageTab {}
87	private method BuildDownloadPopup { widget command }
88	private method Combo { option }
89	private method DrawLegend {}
90	private method EnterLegend { x y }
91	private method EventuallyRequestLegend {}
92	private method EventuallyResize { w h }
93	private method EventuallyRotate { q }
94	private method GetImage { args }
95	private method GetVtkData { args }
96	private method IsValidObject { dataobj }
97	private method LeaveLegend {}
98	private method MotionLegend { x y }
99	private method PanCamera {}
100	private method RequestLegend {}
101	private method SetCurrentColormap { color }
102	private method SetLegendTip { x y }
103	private method SetObjectStyle { dataobj comp }
104	private method SetOrientation { side }
105
106	private variable _arcball ""
107	private variable _dlist "" ; # list of data objects
108	private variable _obj2datasets
109	private variable _obj2ovride ; # maps dataobj => style override
110	private variable _datasets ; # contains all the dataobj-component
111	; # datasets in the server
112	private variable _colormaps ; # contains all the colormaps
113	; # in the server.
114
115	# The name of the current colormap used. The colormap is global to all
116	# images displayed.
117	private variable _currentColormap ""
118	private variable _currentNumIsolines -1
119
120	private variable _maxScale 100; # This is the # of times the x-axis
121	# and y-axis ranges can differ before
122	# automatically turning on
123	# -stretchtofit
124
125	private variable _click ; # info used for rotate operations
126	private variable _limits ; # Holds overall limits for all dataobjs
127	# using the viewer.
128	private variable _view ; # view params for 3D view
129	private variable _settings
130	private variable _changed
131	private variable _initialStyle ""; # First found style in dataobjects.
132	private variable _reset 1; # Indicates if camera needs to be reset
133	# to starting position.
134	private variable _beforeConnect 1; # Indicates if camera needs to be reset
135	# to starting position.
136
137	private variable _first "" ; # This is the topmost dataset.
138	private variable _start 0
139	private variable _isolines
140	private variable _contourList ""
141
142	common _downloadPopup; # download options from popup
143	private common _hardcopy
144	private variable _width 0
145	private variable _height 0
146	private variable _legendWidth 0
147	private variable _legendHeight 0
148	private variable _resizePending 0
149	private variable _rotatePending 0
150	private variable _legendPending 0
151	private variable _fieldNames {}
152	private variable _fields
153	private variable _curFldName ""
154	private variable _curFldLabel ""
155	private variable _colorMode "scalar";# Mode of colormap (vmag or scalar)
156	}
157
158	itk::usual VtkImageViewer {
159	keep -background -foreground -cursor -font
160	keep -plotbackground -plotforeground -mode
161	}
162
163	# ----------------------------------------------------------------------
164	# CONSTRUCTOR
165	# ----------------------------------------------------------------------
166	itcl::body Rappture::VtkImageViewer::constructor {hostlist args} {
167	set _serverType "vtkvis"
168
169	EnableWaitDialog 900
170	# Rebuild event
171	$_dispatcher register !rebuild
172	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
173
174	# Resize event
175	$_dispatcher register !resize
176	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
177
178	# Rotate event
179	$_dispatcher register !rotate
180	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
181
182	# Legend event
183	$_dispatcher register !legend
184	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
185
186	#
187	# Populate parser with commands handle incoming requests
188	#
189	$_parser alias image [itcl::code $this ReceiveImage]
190	$_parser alias dataset [itcl::code $this ReceiveDataset]
191	$_parser alias legend [itcl::code $this ReceiveLegend]
192
193	# Create image for legend colorbar.
194	set _image(legend) [image create photo]
195
196	# Initialize the view to some default parameters.
197	array set _view {
198	qw 0.36
199	qx 0.25
200	qy 0.50
201	qz 0.70
202	zoom 1.0
203	xpan 0
204	ypan 0
205	ortho 0
206	}
207	set _arcball [blt::arcball create 100 100]
208	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
209	$_arcball quaternion $q
210
211	array set _settings {
212	axisFlymode "static"
213	axisLabels 1
214	axisMinorTicks 1
215	axisVisible 1
216	axisXGrid 0
217	axisYGrid 0
218	axisZGrid 0
219	backingColor white
220	backingVisible 1
221	colormapDiscrete 0
222	field "Default"
223	legendVisible 0
224	level 127.5
225	numColors 256
226	opacity 100
227	outline 0
228	saveOpacity 100
229	stretchToFit 0
230	view3D 0
231	window 255.0
232	}
233	array set _changed {
234	opacity 0
235	colormap 0
236	}
237	itk_component add view {
238	canvas $itk_component(plotarea).view \
239	-highlightthickness 0 -borderwidth 0
240	} {
241	usual
242	ignore -highlightthickness -borderwidth -background
243	}
244
245	itk_component add fieldmenu {
246	menu $itk_component(plotarea).menu \
247	-relief flat \
248	-tearoff no
249	} {
250	usual
251	ignore -background -foreground -relief -tearoff
252	}
253	set c $itk_component(view)
254	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
255	bind $c <4> [itcl::code $this Zoom in 0.25]
256	bind $c <5> [itcl::code $this Zoom out 0.25]
257	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
258	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
259	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
260	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
261	bind $c <Enter> "focus %W"
262	bind $c <Control-F1> [itcl::code $this ToggleConsole]
263
264	# Fix the scrollregion in case we go off screen
265	$c configure -scrollregion [$c bbox all]
266
267	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
268	set _map(cwidth) -1
269	set _map(cheight) -1
270	set _map(zoom) 1.0
271	set _map(original) ""
272
273	set f [$itk_component(main) component controls]
274	itk_component add reset {
275	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
276	-highlightthickness 0 \
277	-image [Rappture::icon reset-view] \
278	-command [itcl::code $this Zoom reset]
279	} {
280	usual
281	ignore -highlightthickness
282	}
283	pack $itk_component(reset) -side top -padx 2 -pady { 2 0 }
284	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
285
286	itk_component add zoomin {
287	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
288	-highlightthickness 0 \
289	-image [Rappture::icon zoom-in] \
290	-command [itcl::code $this Zoom in]
291	} {
292	usual
293	ignore -highlightthickness
294	}
295	pack $itk_component(zoomin) -side top -padx 2 -pady { 2 0 }
296	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
297
298	itk_component add zoomout {
299	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
300	-highlightthickness 0 \
301	-image [Rappture::icon zoom-out] \
302	-command [itcl::code $this Zoom out]
303	} {
304	usual
305	ignore -highlightthickness
306	}
307	pack $itk_component(zoomout) -side top -padx 2 -pady { 2 0 }
308	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
309
310	itk_component add mode {
311	Rappture::PushButton $f.mode \
312	-onimage [Rappture::icon surface] \
313	-offimage [Rappture::icon surface] \
314	-variable [itcl::scope _settings(view3D)] \
315	-command [itcl::code $this AdjustSetting view3D] \
316	}
317	Rappture::Tooltip::for $itk_component(mode) \
318	"Toggle the surface/contour on/off"
319	pack $itk_component(mode) -padx 2 -pady { 2 0 }
320
321	itk_component add stretchtofit {
322	Rappture::PushButton $f.stretchtofit \
323	-onimage [Rappture::icon stretchtofit] \
324	-offimage [Rappture::icon stretchtofit] \
325	-variable [itcl::scope _settings(stretchToFit)] \
326	-command [itcl::code $this AdjustSetting stretchToFit] \
327	}
328	Rappture::Tooltip::for $itk_component(stretchtofit) \
329	"Stretch plot to fit window on/off"
330	pack $itk_component(stretchtofit) -padx 2 -pady 2
331
332	if { [catch {
333	BuildImageTab
334	BuildAxisTab
335	BuildCameraTab
336	} errs] != 0 } {
337	global errorInfo
338	puts stderr "errs=$errs errorInfo=$errorInfo"
339	}
340
341	# Hack around the Tk panewindow. The problem is that the requested
342	# size of the 3d view isn't set until an image is retrieved from
343	# the server. So the panewindow uses the tiny size.
344	set w 10000
345	pack forget $itk_component(view)
346	blt::table $itk_component(plotarea) \
347	0,0 $itk_component(view) -fill both -reqwidth $w
348	blt::table configure $itk_component(plotarea) c1 -resize none
349
350	# Bindings for panning via mouse
351	bind $itk_component(view) <ButtonPress-2> \
352	[itcl::code $this Pan click %x %y]
353	bind $itk_component(view) <B2-Motion> \
354	[itcl::code $this Pan drag %x %y]
355	bind $itk_component(view) <ButtonRelease-2> \
356	[itcl::code $this Pan release %x %y]
357
358	#bind $itk_component(view) <ButtonRelease-3> \
359	# [itcl::code $this Pick %x %y]
360
361	# Bindings for panning via keyboard
362	bind $itk_component(view) <KeyPress-Left> \
363	[itcl::code $this Pan set -10 0]
364	bind $itk_component(view) <KeyPress-Right> \
365	[itcl::code $this Pan set 10 0]
366	bind $itk_component(view) <KeyPress-Up> \
367	[itcl::code $this Pan set 0 -10]
368	bind $itk_component(view) <KeyPress-Down> \
369	[itcl::code $this Pan set 0 10]
370	bind $itk_component(view) <Shift-KeyPress-Left> \
371	[itcl::code $this Pan set -2 0]
372	bind $itk_component(view) <Shift-KeyPress-Right> \
373	[itcl::code $this Pan set 2 0]
374	bind $itk_component(view) <Shift-KeyPress-Up> \
375	[itcl::code $this Pan set 0 -2]
376	bind $itk_component(view) <Shift-KeyPress-Down> \
377	[itcl::code $this Pan set 0 2]
378
379	# Bindings for zoom via keyboard
380	bind $itk_component(view) <KeyPress-Prior> \
381	[itcl::code $this Zoom out]
382	bind $itk_component(view) <KeyPress-Next> \
383	[itcl::code $this Zoom in]
384
385	bind $itk_component(view) <Enter> "focus $itk_component(view)"
386
387	if {[string equal "x11" [tk windowingsystem]]} {
388	# Bindings for zoom via mouse
389	bind $itk_component(view) <4> [itcl::code $this Zoom out]
390	bind $itk_component(view) <5> [itcl::code $this Zoom in]
391	}
392
393	set _image(download) [image create photo]
394	eval itk_initialize $args
395	Connect
396	set _beforeConnect 0
397	}
398
399	# ----------------------------------------------------------------------
400	# DESTRUCTOR
401	# ----------------------------------------------------------------------
402	itcl::body Rappture::VtkImageViewer::destructor {} {
403	Disconnect
404	image delete $_image(plot)
405	image delete $_image(download)
406	catch { blt::arcball destroy $_arcball }
407	}
408
409	itcl::body Rappture::VtkImageViewer::DoResize {} {
410	if { $_width < 2 } {
411	set _width 500
412	}
413	if { $_height < 2 } {
414	set _height 500
415	}
416	set _start [clock clicks -milliseconds]
417	SendCmd "screen size [expr $_width - 20] $_height"
418
419	set font "Arial 8"
420	set lh [font metrics $font -linespace]
421	set h [expr {$_height - 2 * ($lh + 2)}]
422	if { $h != $_legendHeight } {
423	EventuallyRequestLegend
424	} else {
425	DrawLegend
426	}
427	set _resizePending 0
428	}
429
430	itcl::body Rappture::VtkImageViewer::DoRotate {} {
431	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
432	SendCmd "camera orient $q"
433	set _rotatePending 0
434	}
435
436	itcl::body Rappture::VtkImageViewer::EventuallyRequestLegend {} {
437	if { !$_legendPending } {
438	set _legendPending 1
439	$_dispatcher event -idle !legend
440	}
441	}
442
443	itcl::body Rappture::VtkImageViewer::EventuallyResize { w h } {
444	set _width $w
445	set _height $h
446	$_arcball resize $w $h
447	if { !$_resizePending } {
448	set _resizePending 1
449	$_dispatcher event -after 250 !resize
450	}
451	}
452
453	set rotate_delay 100
454
455	itcl::body Rappture::VtkImageViewer::EventuallyRotate { q } {
456	foreach { _view(qw) _view(qx) _view(qy) _view(qz) } $q break
457	if { !$_rotatePending } {
458	set _rotatePending 1
459	global rotate_delay
460	$_dispatcher event -after $rotate_delay !rotate
461	}
462	}
463
464	# ----------------------------------------------------------------------
465	# USAGE: add <dataobj> ?<settings>?
466	#
467	# Clients use this to add a data object to the plot. The optional
468	# <settings> are used to configure the plot. Allowed settings are
469	# -color, -brightness, -width, -linestyle, and -raise.
470	# ----------------------------------------------------------------------
471	itcl::body Rappture::VtkImageViewer::add {dataobj {settings ""}} {
472	if { ![$dataobj isvalid] } {
473	return; # Object doesn't contain valid data.
474	}
475	array set params {
476	-color auto
477	-width 1
478	-linestyle solid
479	-brightness 0
480	-raise 0
481	-description ""
482	-param ""
483	-type ""
484	}
485	array set params $settings
486	set params(-description) ""
487	set params(-param) ""
488	array set params $settings
489
490	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
491	# can't handle -autocolors yet
492	set params(-color) white
493	}
494	set pos [lsearch -exact $_dlist $dataobj]
495	if {$pos < 0} {
496	lappend _dlist $dataobj
497	}
498	set _obj2ovride($dataobj-color) $params(-color)
499	set _obj2ovride($dataobj-width) $params(-width)
500	set _obj2ovride($dataobj-raise) $params(-raise)
501	$_dispatcher event -idle !rebuild
502	}
503
504
505	# ----------------------------------------------------------------------
506	# USAGE: delete ?<dataobj1> <dataobj2> ...?
507	#
508	# Clients use this to delete a dataobj from the plot. If no dataobjs
509	# are specified, then all dataobjs are deleted. No data objects are
510	# deleted. They are only removed from the display list.
511	#
512	# ----------------------------------------------------------------------
513	itcl::body Rappture::VtkImageViewer::delete {args} {
514	if { [llength $args] == 0} {
515	set args $_dlist
516	}
517	# Delete all specified dataobjs
518	set changed 0
519	foreach dataobj $args {
520	set pos [lsearch -exact $_dlist $dataobj]
521	if { $pos < 0 } {
522	continue; # Don't know anything about it.
523	}
524	# Remove it from the dataobj list.
525	set _dlist [lreplace $_dlist $pos $pos]
526	array unset _obj2ovride $dataobj-*
527	array unset _settings $dataobj-*
528	set changed 1
529	}
530	# If anything changed, then rebuild the plot
531	if { $changed } {
532	$_dispatcher event -idle !rebuild
533	}
534	}
535
536	# ----------------------------------------------------------------------
537	# USAGE: get ?-objects?
538	# USAGE: get ?-visible?
539	# USAGE: get ?-image view?
540	#
541	# Clients use this to query the list of objects being plotted, in
542	# order from bottom to top of this result. The optional "-image"
543	# flag can also request the internal images being shown.
544	# ----------------------------------------------------------------------
545	itcl::body Rappture::VtkImageViewer::get {args} {
546	if {[llength $args] == 0} {
547	set args "-objects"
548	}
549	set op [lindex $args 0]
550	switch -- $op {
551	"-objects" {
552	# put the dataobj list in order according to -raise options
553	set dlist {}
554	foreach dataobj $_dlist {
555	if { ![IsValidObject $dataobj] } {
556	continue
557	}
558	if {[info exists _obj2ovride($dataobj-raise)] &&
559	$_obj2ovride($dataobj-raise)} {
560	set dlist [linsert $dlist 0 $dataobj]
561	} else {
562	lappend dlist $dataobj
563	}
564	}
565	return $dlist
566	}
567	"-visible" {
568	set dlist {}
569	foreach dataobj $_dlist {
570	if { ![IsValidObject $dataobj] } {
571	continue
572	}
573	if { ![info exists _obj2ovride($dataobj-raise)] } {
574	# No setting indicates that the object isn't visible.
575	continue
576	}
577	# Otherwise use the -raise parameter to put the object to
578	# the front of the list.
579	if { $_obj2ovride($dataobj-raise) } {
580	set dlist [linsert $dlist 0 $dataobj]
581	} else {
582	lappend dlist $dataobj
583	}
584	}
585	return $dlist
586	}
587	-image {
588	if {[llength $args] != 2} {
589	error "wrong # args: should be \"get -image view\""
590	}
591	switch -- [lindex $args end] {
592	view {
593	return $_image(plot)
594	}
595	default {
596	error "bad image name \"[lindex $args end]\": should be view"
597	}
598	}
599	}
600	default {
601	error "bad option \"$op\": should be -objects or -image"
602	}
603	}
604	}
605
606	#
607	# scale --
608	#
609	# This gets called either incrementally as new simulations are
610	# added or all at once as a sequence of images.
611	# This accounts for all objects--even those not showing on the
612	# screen. Because of this, the limits are appropriate for all
613	# objects as the user scans through data in the ResultSet viewer.
614	#
615	itcl::body Rappture::VtkImageViewer::scale {args} {
616	foreach dataobj $args {
617	if { ![$dataobj isvalid] } {
618	continue; # Object doesn't contain valid data.
619	}
620	foreach axis { x y } {
621	set lim [$dataobj limits $axis]
622	if { ![info exists _limits($axis)] } {
623	set _limits($axis) $lim
624	continue
625	}
626	foreach {min max} $lim break
627	foreach {amin amax} $_limits($axis) break
628	if { $amin > $min } {
629	set amin $min
630	}
631	if { $amax < $max } {
632	set amax $max
633	}
634	set _limits($axis) [list $amin $amax]
635	set units [$dataobj hints ${axis}units]
636	set found($units) 1
637	}
638	foreach { fname lim } [$dataobj fieldlimits] {
639	if { ![info exists _limits($fname)] } {
640	set _limits($fname) $lim
641	continue
642	}
643	foreach {min max} $lim break
644	foreach {fmin fmax} $_limits($fname) break
645	if { $fmin > $min } {
646	set fmin $min
647	}
648	if { $fmax < $max } {
649	set fmax $max
650	}
651	set _limits($fname) [list $fmin $fmax]
652	}
653	}
654	if { [array size found] > 1 } {
655	set _settings(stretchToFit) 1
656	} else {
657	# Check if the range of the x and y axes requires that we stretch
658	# the contour to fit the plotting area. This can happen when the
659	# x and y scales differ greatly (> 100x)
660	foreach {xmin xmax} $_limits(x) break
661	foreach {ymin ymax} $_limits(y) break
662	if { (($xmax - $xmin) > (($ymax -$ymin) * $_maxScale)) \|\|
663	((($xmax - $xmin) * $_maxScale) < ($ymax -$ymin)) } {
664	set _settings(stretchToFit) 1
665	}
666	}
667	}
668
669	# ----------------------------------------------------------------------
670	# USAGE: download coming
671	# USAGE: download controls <downloadCommand>
672	# USAGE: download now
673	#
674	# Clients use this method to create a downloadable representation
675	# of the plot. Returns a list of the form {ext string}, where
676	# "ext" is the file extension (indicating the type of data) and
677	# "string" is the data itself.
678	# ----------------------------------------------------------------------
679	itcl::body Rappture::VtkImageViewer::download {option args} {
680	switch $option {
681	coming {
682	if {[catch {
683	blt::winop snap $itk_component(plotarea) $_image(download)
684	}]} {
685	$_image(download) configure -width 1 -height 1
686	$_image(download) put #000000
687	}
688	}
689	controls {
690	set popup .vtkviewerdownload
691	if { ![winfo exists .vtkviewerdownload] } {
692	set inner [BuildDownloadPopup $popup [lindex $args 0]]
693	} else {
694	set inner [$popup component inner]
695	}
696	set _downloadPopup(image_controls) $inner.image_frame
697	set num [llength [get]]
698	set num [expr {($num == 1) ? "1 result" : "$num results"}]
699	set word [Rappture::filexfer::label downloadWord]
700	$inner.summary configure -text "$word $num in the following format:"
701	update idletasks ;# Fix initial sizes
702	return $popup
703	}
704	now {
705	set popup .vtkviewerdownload
706	if {[winfo exists .vtkviewerdownload]} {
707	$popup deactivate
708	}
709	switch -- $_downloadPopup(format) {
710	"image" {
711	return [$this GetImage [lindex $args 0]]
712	}
713	"vtk" {
714	return [$this GetVtkData [lindex $args 0]]
715	}
716	}
717	return ""
718	}
719	default {
720	error "bad option \"$option\": should be coming, controls, now"
721	}
722	}
723	}
724
725	# ----------------------------------------------------------------------
726	# USAGE: Connect ?<host:port>,<host:port>...?
727	#
728	# Clients use this method to establish a connection to a new
729	# server, or to reestablish a connection to the previous server.
730	# Any existing connection is automatically closed.
731	# ----------------------------------------------------------------------
732	itcl::body Rappture::VtkImageViewer::Connect {} {
733	global readyForNextFrame
734	set readyForNextFrame 1
735	set _reset 1
736	set _hosts [GetServerList "vtkvis"]
737	if { "" == $_hosts } {
738	return 0
739	}
740	set result [VisViewer::Connect $_hosts]
741	if { $result } {
742	if { $_reportClientInfo } {
743	# Tell the server the viewer, hub, user and session.
744	# Do this immediately on connect before buffering any commands
745	global env
746
747	set info {}
748	set user "???"
749	if { [info exists env(USER)] } {
750	set user $env(USER)
751	}
752	set session "???"
753	if { [info exists env(SESSION)] } {
754	set session $env(SESSION)
755	}
756	lappend info "version" "$Rappture::version"
757	lappend info "build" "$Rappture::build"
758	lappend info "svnurl" "$Rappture::svnurl"
759	lappend info "installdir" "$Rappture::installdir"
760	lappend info "hub" [exec hostname]
761	lappend info "client" "vtkimageviewer"
762	lappend info "user" $user
763	lappend info "session" $session
764	SendCmd "clientinfo [list $info]"
765	}
766	set w [winfo width $itk_component(view)]
767	set h [winfo height $itk_component(view)]
768	EventuallyResize $w $h
769	}
770	return $result
771	}
772
773	#
774	# isconnected --
775	#
776	# Indicates if we are currently connected to the visualization server.
777	#
778	itcl::body Rappture::VtkImageViewer::isconnected {} {
779	return [VisViewer::IsConnected]
780	}
781
782	#
783	# disconnect --
784	#
785	itcl::body Rappture::VtkImageViewer::disconnect {} {
786	Disconnect
787	set _reset 1
788	}
789
790	#
791	# Disconnect --
792	#
793	# Clients use this method to disconnect from the current rendering
794	# server.
795	#
796	itcl::body Rappture::VtkImageViewer::Disconnect {} {
797	VisViewer::Disconnect
798
799	$_dispatcher cancel !rebuild
800	$_dispatcher cancel !resize
801	$_dispatcher cancel !rotate
802	$_dispatcher cancel !legend
803	# disconnected -- no more data sitting on server
804	array unset _datasets
805	array unset _data
806	array unset _colormaps
807	array unset _obj2datasets
808	global readyForNextFrame
809	set readyForNextFrame 1
810	}
811
812	# ----------------------------------------------------------------------
813	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
814	#
815	# Invoked automatically whenever the "image" command comes in from
816	# the rendering server. Indicates that binary image data with the
817	# specified <size> will follow.
818	# ----------------------------------------------------------------------
819	itcl::body Rappture::VtkImageViewer::ReceiveImage { args } {
820	global readyForNextFrame
821	set readyForNextFrame 1
822	array set info {
823	-token "???"
824	-bytes 0
825	-type image
826	}
827	array set info $args
828	set bytes [ReceiveBytes $info(-bytes)]
829	if { $info(-type) == "image" } {
830	if 0 {
831	set f [open "last.ppm" "w"]
832	puts $f $bytes
833	close $f
834	}
835	$_image(plot) configure -data $bytes
836	set time [clock seconds]
837	set date [clock format $time]
838	#puts stderr "$date: received image [image width $_image(plot)]x[image height $_image(plot)] image>"
839	if { $_start > 0 } {
840	set finish [clock clicks -milliseconds]
841	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
842	set _start 0
843	}
844	} elseif { $info(type) == "print" } {
845	set tag $this-print-$info(-token)
846	set _hardcopy($tag) $bytes
847	}
848	}
849
850	#
851	# ReceiveDataset --
852	#
853	itcl::body Rappture::VtkImageViewer::ReceiveDataset { args } {
854	if { ![isconnected] } {
855	return
856	}
857	set option [lindex $args 0]
858	switch -- $option {
859	"scalar" {
860	set option [lindex $args 1]
861	switch -- $option {
862	"world" {
863	foreach { x y z value tag } [lrange $args 2 end] break
864	}
865	"pixel" {
866	foreach { x y value tag } [lrange $args 2 end] break
867	}
868	}
869	}
870	"vector" {
871	set option [lindex $args 1]
872	switch -- $option {
873	"world" {
874	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
875	}
876	"pixel" {
877	foreach { x y vx vy vz tag } [lrange $args 2 end] break
878	}
879	}
880	}
881	"names" {
882	foreach { name } [lindex $args 1] {
883	#puts stderr "Dataset: $name"
884	}
885	}
886	default {
887	error "unknown dataset option \"$option\" from server"
888	}
889	}
890	}
891
892	# ----------------------------------------------------------------------
893	# USAGE: Rebuild
894	#
895	# Called automatically whenever something changes that affects the
896	# data in the widget. Clears any existing data and rebuilds the
897	# widget to display new data.
898	# ----------------------------------------------------------------------
899	itcl::body Rappture::VtkImageViewer::Rebuild {} {
900	set w [winfo width $itk_component(view)]
901	set h [winfo height $itk_component(view)]
902	if { $w < 2 \|\| $h < 2 } {
903	$_dispatcher event -idle !rebuild
904	return
905	}
906
907	# Turn on buffering of commands to the server. We don't want to
908	# be preempted by a server disconnect/reconnect (which automatically
909	# generates a new call to Rebuild).
910	StartBufferingCommands
911
912	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
913	set _width $w
914	set _height $h
915	$_arcball resize $w $h
916	DoResize
917	if { $_settings(stretchToFit) } {
918	AdjustSetting stretchToFit
919	}
920	}
921	if { $_reset } {
922	#
923	# Reset the camera and other view parameters
924	#
925	InitSettings view3D background
926
927	SendCmd "axis lrot z 90"
928	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
929	$_arcball quaternion $q
930	if {$_settings(view3D) } {
931	if { $_view(ortho)} {
932	SendCmd "camera mode ortho"
933	} else {
934	SendCmd "camera mode persp"
935	}
936	DoRotate
937	SendCmd "camera reset"
938	}
939	PanCamera
940	StopBufferingCommands
941	SendCmd "imgflush"
942	StartBufferingCommands
943	}
944
945	set _first ""
946	# Start off with no datasets are visible.
947	SendCmd "dataset visible 0"
948	foreach dataobj [get -objects] {
949	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
950	set _first $dataobj
951	}
952	set _obj2datasets($dataobj) ""
953	foreach comp [$dataobj components] {
954	set tag $dataobj-$comp
955	if { ![info exists _datasets($tag)] } {
956	set bytes [$dataobj vtkdata $comp]
957	if 0 {
958	set f [open /tmp/vtkimage.vtk "w"]
959	puts $f $bytes
960	close $f
961	}
962	set length [string length $bytes]
963	if { $_reportClientInfo } {
964	set info {}
965	lappend info "tool_id" [$dataobj hints toolId]
966	lappend info "tool_name" [$dataobj hints toolName]
967	lappend info "tool_version" [$dataobj hints toolRevision]
968	lappend info "tool_title" [$dataobj hints toolTitle]
969	lappend info "dataset_label" [$dataobj hints label]
970	lappend info "dataset_size" $length
971	lappend info "dataset_tag" $tag
972	SendCmd [list "clientinfo" $info]
973	}
974	SendCmd "dataset add $tag data follows $length"
975	append _outbuf $bytes
976	set _datasets($tag) 1
977	SetObjectStyle $dataobj $comp
978	}
979	lappend _obj2datasets($dataobj) $tag
980	if { [info exists _obj2ovride($dataobj-raise)] } {
981	# Setting dataset visible enables outline
982	# and image
983	SendCmd "dataset visible 1 $tag"
984	}
985	}
986	}
987	if { $_first != "" } {
988	$itk_component(field) choices delete 0 end
989	$itk_component(fieldmenu) delete 0 end
990	array unset _fields
991	set _curFldName ""
992	foreach cname [$_first components] {
993	foreach fname [$_first fieldnames $cname] {
994	if { [info exists _fields($fname)] } {
995	continue
996	}
997	foreach { label units components } \
998	[$_first fieldinfo $fname] break
999	$itk_component(field) choices insert end "$fname" "$label"
1000	$itk_component(fieldmenu) add radiobutton -label "$label" \
1001	-value $label -variable [itcl::scope _curFldLabel] \
1002	-selectcolor red \
1003	-activebackground $itk_option(-plotbackground) \
1004	-activeforeground $itk_option(-plotforeground) \
1005	-font "Arial 8" \
1006	-command [itcl::code $this Combo invoke]
1007	set _fields($fname) [list $label $units $components]
1008	if { $_curFldName == "" } {
1009	set _curFldName $fname
1010	set _curFldLabel $label
1011	}
1012	}
1013	}
1014	$itk_component(field) value $_curFldLabel
1015	}
1016	InitSettings stretchToFit outline
1017
1018	if { $_reset } {
1019	SendCmd "axis tickpos outside"
1020	#SendCmd "axis lformat all %g"
1021
1022	foreach axis { x y z } {
1023	set label [$_first hints ${axis}label]
1024	if { $label == "" } {
1025	set label [string toupper $axis]
1026	}
1027	# May be a space in the axis label.
1028	SendCmd [list axis name $axis $label]
1029
1030	if {$axis == "z" && [$_first hints ${axis}units] == ""} {
1031	set units [lindex $_fields($_curFldName) 1]
1032	} else {
1033	set units [$_first hints ${axis}units]
1034	}
1035	if { $units != "" } {
1036	# May be a space in the axis units.
1037	SendCmd [list axis units $axis $units]
1038	}
1039	}
1040	#
1041	# Reset the camera and other view parameters
1042	#
1043	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1044	$_arcball quaternion $q
1045	if {$_settings(view3D) } {
1046	if { $_view(ortho)} {
1047	SendCmd "camera mode ortho"
1048	} else {
1049	SendCmd "camera mode persp"
1050	}
1051	DoRotate
1052	SendCmd "camera reset"
1053	}
1054	PanCamera
1055	InitSettings axisXGrid axisYGrid axisZGrid \
1056	axisVisible axisLabels field view3D
1057	if { [array size _fields] < 2 } {
1058	catch {blt::table forget $itk_component(field) $itk_component(field_l)}
1059	}
1060	RequestLegend
1061	set _reset 0
1062	}
1063	global readyForNextFrame
1064	set readyForNextFrame 0; # Don't advance to the next frame
1065
1066	# Actually write the commands to the server socket. If it fails, we don't
1067	# care. We're finished here.
1068	blt::busy hold $itk_component(hull)
1069	StopBufferingCommands
1070	blt::busy release $itk_component(hull)
1071	}
1072
1073	# ----------------------------------------------------------------------
1074	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1075	#
1076	# Returns a list of server IDs for the current datasets being displayed. This
1077	# is normally a single ID, but it might be a list of IDs if the current data
1078	# object has multiple components.
1079	# ----------------------------------------------------------------------
1080	itcl::body Rappture::VtkImageViewer::CurrentDatasets {args} {
1081	set flag [lindex $args 0]
1082	switch -- $flag {
1083	"-all" {
1084	if { [llength $args] > 1 } {
1085	error "CurrentDatasets: can't specify dataobj after \"-all\""
1086	}
1087	set dlist [get -objects]
1088	}
1089	"-visible" {
1090	if { [llength $args] > 1 } {
1091	set dlist {}
1092	set args [lrange $args 1 end]
1093	foreach dataobj $args {
1094	if { [info exists _obj2ovride($dataobj-raise)] } {
1095	lappend dlist $dataobj
1096	}
1097	}
1098	} else {
1099	set dlist [get -visible]
1100	}
1101	}
1102	default {
1103	set dlist $args
1104	}
1105	}
1106	set rlist ""
1107	foreach dataobj $dlist {
1108	foreach comp [$dataobj components] {
1109	set tag $dataobj-$comp
1110	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1111	lappend rlist $tag
1112	}
1113	}
1114	}
1115	return $rlist
1116	}
1117
1118	# ----------------------------------------------------------------------
1119	# USAGE: Zoom in
1120	# USAGE: Zoom out
1121	# USAGE: Zoom reset
1122	#
1123	# Called automatically when the user clicks on one of the zoom
1124	# controls for this widget. Changes the zoom for the current view.
1125	# ----------------------------------------------------------------------
1126	itcl::body Rappture::VtkImageViewer::Zoom {option} {
1127	switch -- $option {
1128	"in" {
1129	set _view(zoom) [expr {$_view(zoom)*1.25}]
1130	SendCmd "camera zoom $_view(zoom)"
1131	}
1132	"out" {
1133	set _view(zoom) [expr {$_view(zoom)*0.8}]
1134	SendCmd "camera zoom $_view(zoom)"
1135	}
1136	"reset" {
1137	array set _view {
1138	qw 0.36
1139	qx 0.25
1140	qy 0.50
1141	qz 0.70
1142	zoom 1.0
1143	xpan 0
1144	ypan 0
1145	}
1146	if { $_first != "" } {
1147	set location [$_first hints camera]
1148	if { $location != "" } {
1149	array set _view $location
1150	}
1151	}
1152	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1153	$_arcball quaternion $q
1154	if {$_settings(view3D) } {
1155	DoRotate
1156	}
1157	SendCmd "camera reset"
1158	}
1159	}
1160	}
1161
1162	itcl::body Rappture::VtkImageViewer::PanCamera {} {
1163	set x $_view(xpan)
1164	set y $_view(ypan)
1165	SendCmd "camera pan $x $y"
1166	}
1167
1168
1169	# ----------------------------------------------------------------------
1170	# USAGE: Rotate click <x> <y>
1171	# USAGE: Rotate drag <x> <y>
1172	# USAGE: Rotate release <x> <y>
1173	#
1174	# Called automatically when the user clicks/drags/releases in the
1175	# plot area. Moves the plot according to the user's actions.
1176	# ----------------------------------------------------------------------
1177	itcl::body Rappture::VtkImageViewer::Rotate {option x y} {
1178	switch -- $option {
1179	"click" {
1180	$itk_component(view) configure -cursor fleur
1181	set _click(x) $x
1182	set _click(y) $y
1183	}
1184	"drag" {
1185	if {[array size _click] == 0} {
1186	Rotate click $x $y
1187	} else {
1188	set w [winfo width $itk_component(view)]
1189	set h [winfo height $itk_component(view)]
1190	if {$w <= 0 \|\| $h <= 0} {
1191	return
1192	}
1193
1194	if {[catch {
1195	# this fails sometimes for no apparent reason
1196	set dx [expr {double($x-$_click(x))/$w}]
1197	set dy [expr {double($y-$_click(y))/$h}]
1198	}]} {
1199	return
1200	}
1201	if { $dx == 0 && $dy == 0 } {
1202	return
1203	}
1204	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1205	EventuallyRotate $q
1206	set _click(x) $x
1207	set _click(y) $y
1208	}
1209	}
1210	"release" {
1211	Rotate drag $x $y
1212	$itk_component(view) configure -cursor ""
1213	catch {unset _click}
1214	}
1215	default {
1216	error "bad option \"$option\": should be click, drag, release"
1217	}
1218	}
1219	}
1220
1221	itcl::body Rappture::VtkImageViewer::Pick {x y} {
1222	foreach tag [CurrentDatasets -visible] {
1223	SendCmd "dataset getscalar pixel $x $y $tag"
1224	}
1225	}
1226
1227	# ----------------------------------------------------------------------
1228	# USAGE: $this Pan click x y
1229	# $this Pan drag x y
1230	# $this Pan release x y
1231	#
1232	# Called automatically when the user clicks on one of the zoom
1233	# controls for this widget. Changes the zoom for the current view.
1234	# ----------------------------------------------------------------------
1235	itcl::body Rappture::VtkImageViewer::Pan {option x y} {
1236	switch -- $option {
1237	"set" {
1238	set w [winfo width $itk_component(view)]
1239	set h [winfo height $itk_component(view)]
1240	set x [expr $x / double($w)]
1241	set y [expr $y / double($h)]
1242	set _view(xpan) [expr $_view(xpan) + $x]
1243	set _view(ypan) [expr $_view(ypan) + $y]
1244	PanCamera
1245	return
1246	}
1247	"click" {
1248	set _click(x) $x
1249	set _click(y) $y
1250	$itk_component(view) configure -cursor hand1
1251	}
1252	"drag" {
1253	if { ![info exists _click(x)] } {
1254	set _click(x) $x
1255	}
1256	if { ![info exists _click(y)] } {
1257	set _click(y) $y
1258	}
1259	set w [winfo width $itk_component(view)]
1260	set h [winfo height $itk_component(view)]
1261	set dx [expr ($_click(x) - $x)/double($w)]
1262	set dy [expr ($_click(y) - $y)/double($h)]
1263	set _click(x) $x
1264	set _click(y) $y
1265	set _view(xpan) [expr $_view(xpan) - $dx]
1266	set _view(ypan) [expr $_view(ypan) - $dy]
1267	PanCamera
1268	}
1269	"release" {
1270	Pan drag $x $y
1271	$itk_component(view) configure -cursor ""
1272	}
1273	default {
1274	error "unknown option \"$option\": should set, click, drag, or release"
1275	}
1276	}
1277	}
1278
1279	# ----------------------------------------------------------------------
1280	# USAGE: InitSettings <what> ?<value>?
1281	#
1282	# Used internally to update rendering settings whenever parameters
1283	# change in the popup settings panel. Sends the new settings off
1284	# to the back end.
1285	# ----------------------------------------------------------------------
1286	itcl::body Rappture::VtkImageViewer::InitSettings { args } {
1287	foreach spec $args {
1288	if { [info exists _settings($_first-$spec)] } {
1289	# Reset global setting with dataobj specific setting
1290	set _settings($spec) $_settings($_first-$spec)
1291	}
1292	AdjustSetting $spec
1293	}
1294	}
1295
1296	#
1297	# AdjustSetting --
1298	#
1299	# Changes/updates a specific setting in the widget. There are
1300	# usually user-setable option. Commands are sent to the render
1301	# server.
1302	#
1303	itcl::body Rappture::VtkImageViewer::AdjustSetting {what {value ""}} {
1304	if { $_beforeConnect } {
1305	return
1306	}
1307	switch -- $what {
1308	"axisFlymode" {
1309	set mode [$itk_component(axisflymode) value]
1310	set mode [$itk_component(axisflymode) translate $mode]
1311	set _settings($what) $mode
1312	SendCmd "axis flymode $mode"
1313	}
1314	"axisLabels" {
1315	set bool $_settings($what)
1316	SendCmd "axis labels all $bool"
1317	}
1318	"axisMinorTicks" {
1319	set bool $_settings($what)
1320	SendCmd "axis minticks all $bool"
1321	}
1322	"axisVisible" {
1323	set bool $_settings($what)
1324	SendCmd "axis visible all $bool"
1325	}
1326	"axisXGrid" - "axisYGrid" - "axisZGrid" {
1327	set axis [string tolower [string range $what 4 4]]
1328	set bool $_settings($what)
1329	SendCmd "axis grid $axis $bool"
1330	}
1331	"background" {
1332	set bg [$itk_component(background) value]
1333	array set fgcolors {
1334	"black" "white"
1335	"white" "black"
1336	"grey" "black"
1337	}
1338	set fg $fgcolors($bg)
1339	configure -plotbackground $bg -plotforeground $fg
1340	$itk_component(view) delete "legend"
1341	SendCmd "screen bgcolor [Color2RGB $bg]"
1342	SendCmd "outline color [Color2RGB $fg]"
1343	SendCmd "axis color all [Color2RGB $fg]"
1344	DrawLegend
1345	}
1346	"backingColor" {
1347	set color [$itk_component(backingcolor) value]
1348	if { $color == "none" } {
1349	if { $_settings(backingVisible) } {
1350	SendCmd "image backing 0"
1351	set _settings(backingVisible) 0
1352	}
1353	} else {
1354	if { !$_settings(backingVisible) } {
1355	SendCmd "image backing 1"
1356	set _settings(backingVisible) 1
1357	}
1358	SendCmd "image color [Color2RGB $color]"
1359	}
1360	}
1361	"backingVisible" {
1362	set bool $_settings($what)
1363	SendCmd "image backing $bool"
1364	}
1365	"colormap" {
1366	set _changed($what) 1
1367	StartBufferingCommands
1368	set color [$itk_component(colormap) value]
1369	set _settings($what) $color
1370	SetCurrentColormap $color
1371	if {$_settings(colormapDiscrete)} {
1372	SendCmd "colormap res $_settings(numColors) $color"
1373	}
1374	StopBufferingCommands
1375	EventuallyRequestLegend
1376	}
1377	"colormapDiscrete" {
1378	set bool $_settings($what)
1379	StartBufferingCommands
1380	if {$bool} {
1381	SendCmd "colormap res $_settings(numColors)"
1382	} else {
1383	SendCmd "colormap res default"
1384	}
1385	StopBufferingCommands
1386	EventuallyRequestLegend
1387	}
1388	"field" {
1389	set label [$itk_component(field) value]
1390	set fname [$itk_component(field) translate $label]
1391	set _settings($what) $fname
1392	if { [info exists _fields($fname)] } {
1393	foreach { label units components } $_fields($fname) break
1394	if { $components > 1 } {
1395	set _colorMode vmag
1396	} else {
1397	set _colorMode scalar
1398	}
1399	set _curFldName $fname
1400	set _curFldLabel $label
1401	} else {
1402	puts stderr "unknown field \"$fname\""
1403	return
1404	}
1405
1406	# Get the new limits because the field changed.
1407	SendCmd "dataset scalar $_curFldName"
1408	#SendCmd "image colormode scalar $_curFldName"
1409	SendCmd "camera reset"
1410	DrawLegend
1411	}
1412	"view3D" {
1413	set bool $_settings($what)
1414	set c $itk_component(view)
1415	StartBufferingCommands
1416	# Fix image scale: 0 for contours, 1 for images.
1417	if { $bool } {
1418	set _settings(opacity) $_settings(saveOpacity)
1419	} else {
1420	set _settings(opacity) 100
1421	}
1422	AdjustSetting opacity
1423	if { $bool } {
1424	$itk_component(opacity) configure -state normal
1425	$itk_component(opacity_l) configure -state normal
1426	if {$_view(ortho)} {
1427	SendCmd "camera mode ortho"
1428	} else {
1429	SendCmd "camera mode persp"
1430	}
1431	SendCmd "camera aspect native"
1432	} else {
1433	$itk_component(opacity) configure -state disabled
1434	$itk_component(opacity_l) configure -state disabled
1435	SendCmd "camera mode image"
1436	if {$_settings(stretchToFit)} {
1437	SendCmd "camera aspect window"
1438	}
1439	}
1440	if { $bool } {
1441	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1442	$_arcball quaternion $q
1443	SendCmd "camera orient $q"
1444	} else {
1445	bind $c <ButtonPress-1> {}
1446	bind $c <B1-Motion> {}
1447	bind $c <ButtonRelease-1> {}
1448	}
1449	SendCmd "camera reset"
1450	# Fix the mouse bindings for rotation/panning and the
1451	# camera mode. Ideally we'd create a bindtag for these.
1452	if { $bool } {
1453	# Bindings for rotation via mouse
1454	bind $c <ButtonPress-1> \
1455	[itcl::code $this Rotate click %x %y]
1456	bind $c <B1-Motion> \
1457	[itcl::code $this Rotate drag %x %y]
1458	bind $c <ButtonRelease-1> \
1459	[itcl::code $this Rotate release %x %y]
1460	}
1461	StopBufferingCommands
1462	}
1463	"window" {
1464	set val $_settings($what)
1465	SendCmd "image window $val"
1466	}
1467	"level" {
1468	set val $_settings($what)
1469	SendCmd "image level $val"
1470	}
1471	"legendVisible" {
1472	if { !$_settings($what) } {
1473	$itk_component(view) delete legend
1474	}
1475	DrawLegend
1476	}
1477	"opacity" {
1478	set _changed($what) 1
1479	if { $_settings(view3D) } {
1480	set _settings(saveOpacity) $_settings($what)
1481	set val [expr $_settings($what) * 0.01]
1482	SendCmd "image opacity $val"
1483	} else {
1484	SendCmd "image opacity 1.0"
1485	}
1486	}
1487	"outline" {
1488	set bool $_settings($what)
1489	SendCmd "outline visible $bool"
1490	}
1491	"stretchToFit" {
1492	set bool $_settings($what)
1493	if { $bool } {
1494	if { $_settings(view3D) } {
1495	SendCmd "camera aspect native"
1496	} else {
1497	SendCmd "camera aspect window"
1498	}
1499	} else {
1500	SendCmd "camera aspect native"
1501	}
1502	}
1503	default {
1504	error "don't know how to fix $what"
1505	}
1506	}
1507	}
1508
1509	#
1510	# RequestLegend --
1511	#
1512	# Request a new legend from the server. The size of the legend
1513	# is determined from the height of the canvas.
1514	#
1515	# This should be called when
1516	# 1. A new current colormap is set.
1517	# 2. Window is resized.
1518	# 3. The limits of the data have changed. (Just need a redraw).
1519	# 4. Number of isolines have changed. (Just need a redraw).
1520	# 5. Legend becomes visible (Just need a redraw).
1521	#
1522	itcl::body Rappture::VtkImageViewer::RequestLegend {} {
1523	set _legendPending 0
1524	set font "Arial 8"
1525	set w 12
1526	set lineht [font metrics $font -linespace]
1527	# color ramp height = (canvas height) - (min and max value lines) - 2
1528	set h [expr {$_height - 2 * ($lineht + 2)}]
1529	set _legendHeight $h
1530
1531	set fname $_curFldName
1532	if { [string match "component*" $fname] } {
1533	set title ""
1534	} else {
1535	if { [info exists _fields($fname)] } {
1536	foreach { title units } $_fields($fname) break
1537	if { $units != "" } {
1538	set title [format "%s (%s)" $title $units]
1539	}
1540	} else {
1541	set title $fname
1542	}
1543	}
1544	# If there's a title too, substract one more line
1545	if { $title != "" } {
1546	incr h -$lineht
1547	}
1548	if { $h < 1 } {
1549	return
1550	}
1551	# Set the legend on the first image dataset.
1552	if { $_currentColormap != "" && $_currentColormap != "none" } {
1553	SendCmd "legend $_currentColormap scalar $_curFldName {} $w $h 0"
1554	}
1555	}
1556
1557	#
1558	# SetCurrentColormap --
1559	#
1560	itcl::body Rappture::VtkImageViewer::SetCurrentColormap { name } {
1561	# Keep track of the colormaps that we build.
1562	if { $name != "none" && ![info exists _colormaps($name)] } {
1563	BuildColormap $name
1564	set _colormaps($name) 1
1565	}
1566	set _currentColormap $name
1567	SendCmd "image colormap $_currentColormap"
1568	}
1569
1570
1571	#
1572	# BuildColormap --
1573	#
1574	# Build the designated colormap on the server.
1575	#
1576	itcl::body Rappture::VtkImageViewer::BuildColormap { name } {
1577	set cmap [ColorsToColormap $name]
1578	if { [llength $cmap] == 0 } {
1579	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
1580	}
1581	set wmap "0.0 1.0 1.0 1.0"
1582	SendCmd "colormap add $name { $cmap } { $wmap }"
1583	}
1584
1585	# ----------------------------------------------------------------------
1586	# CONFIGURATION OPTION: -mode
1587	# ----------------------------------------------------------------------
1588	itcl::configbody Rappture::VtkImageViewer::mode {
1589	switch -- $itk_option(-mode) {
1590	"volume" {
1591	set _settings(view3D) 1
1592	}
1593	"vtkimage" {
1594	set _settings(view3D) 0
1595	}
1596	default {
1597	error "unknown mode settings \"$itk_option(-mode)\""
1598	}
1599	}
1600	if { !$_reset } {
1601	AdjustSetting view3D
1602	}
1603	}
1604
1605	# ----------------------------------------------------------------------
1606	# CONFIGURATION OPTION: -plotbackground
1607	# ----------------------------------------------------------------------
1608	itcl::configbody Rappture::VtkImageViewer::plotbackground {
1609	if { [isconnected] } {
1610	set rgb [Color2RGB $itk_option(-plotbackground)]
1611	if { !$_reset } {
1612	SendCmd "screen bgcolor $rgb"
1613	}
1614	$itk_component(view) configure -background $itk_option(-plotbackground)
1615	}
1616	}
1617
1618	# ----------------------------------------------------------------------
1619	# CONFIGURATION OPTION: -plotforeground
1620	# ----------------------------------------------------------------------
1621	itcl::configbody Rappture::VtkImageViewer::plotforeground {
1622	if { [isconnected] } {
1623	set rgb [Color2RGB $itk_option(-plotforeground)]
1624	if { !$_reset } {
1625	SendCmd "outline color $rgb"
1626	SendCmd "axis color all $rgb"
1627	}
1628	}
1629	}
1630
1631	itcl::body Rappture::VtkImageViewer::BuildImageTab {} {
1632
1633	set fg [option get $itk_component(hull) font Font]
1634	#set bfg [option get $itk_component(hull) boldFont Font]
1635
1636	set inner [$itk_component(main) insert end \
1637	-title "Image Settings" \
1638	-icon [Rappture::icon contour2]]
1639	$inner configure -borderwidth 4
1640
1641	checkbutton $inner.legend \
1642	-text "Legend" \
1643	-variable [itcl::scope _settings(legendVisible)] \
1644	-command [itcl::code $this AdjustSetting legendVisible] \
1645	-font "Arial 9"
1646
1647	checkbutton $inner.outline \
1648	-text "Outline" \
1649	-variable [itcl::scope _settings(outline)] \
1650	-command [itcl::code $this AdjustSetting outline] \
1651	-font "Arial 9"
1652
1653	checkbutton $inner.backing \
1654	-text "Backing" \
1655	-variable [itcl::scope _settings(backingVisible)] \
1656	-command [itcl::code $this AdjustSetting backingVisible] \
1657	-font "Arial 9"
1658
1659	checkbutton $inner.stretch \
1660	-text "Stretch to fit" \
1661	-variable [itcl::scope _settings(stretchToFit)] \
1662	-command [itcl::code $this AdjustSetting stretchToFit] \
1663	-font "Arial 9"
1664
1665	checkbutton $inner.colormapDiscrete \
1666	-text "Discrete Colormap" \
1667	-variable [itcl::scope _settings(colormapDiscrete)] \
1668	-command [itcl::code $this AdjustSetting colormapDiscrete] \
1669	-font "Arial 9"
1670
1671	itk_component add field_l {
1672	label $inner.field_l -text "Field" -font "Arial 9"
1673	} {
1674	ignore -font
1675	}
1676	itk_component add field {
1677	Rappture::Combobox $inner.field -width 10 -editable no
1678	}
1679	bind $inner.field <<Value>> \
1680	[itcl::code $this AdjustSetting field]
1681
1682	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1683	itk_component add colormap {
1684	Rappture::Combobox $inner.colormap -width 10 -editable no
1685	}
1686	$inner.colormap choices insert end [GetColormapList -includeNone]
1687
1688	$itk_component(colormap) value "BCGYR"
1689	bind $inner.colormap <<Value>> \
1690	[itcl::code $this AdjustSetting colormap]
1691
1692	label $inner.backingcolor_l -text "Backing Color" -font "Arial 9"
1693	itk_component add backingcolor {
1694	Rappture::Combobox $inner.backingcolor -width 10 -editable no
1695	}
1696	$inner.backingcolor choices insert end \
1697	"black" "black" \
1698	"blue" "blue" \
1699	"cyan" "cyan" \
1700	"green" "green" \
1701	"grey" "grey" \
1702	"magenta" "magenta" \
1703	"orange" "orange" \
1704	"red" "red" \
1705	"white" "white" \
1706	"none" "none"
1707
1708	$itk_component(backingcolor) value "white"
1709	bind $inner.backingcolor <<Value>> \
1710	[itcl::code $this AdjustSetting backingColor]
1711
1712	label $inner.background_l -text "Background Color" -font "Arial 9"
1713	itk_component add background {
1714	Rappture::Combobox $inner.background -width 10 -editable no
1715	}
1716	$inner.background choices insert end \
1717	"black" "black" \
1718	"white" "white" \
1719	"grey" "grey"
1720
1721	$itk_component(background) value "white"
1722	bind $inner.background <<Value>> [itcl::code $this AdjustSetting background]
1723
1724	itk_component add opacity_l {
1725	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1726	} {
1727	ignore -font
1728	}
1729	itk_component add opacity {
1730	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1731	-variable [itcl::scope _settings(opacity)] \
1732	-showvalue off \
1733	-command [itcl::code $this AdjustSetting opacity]
1734	}
1735
1736	itk_component add window_l {
1737	label $inner.window_l -text "Window" -font "Arial 9"
1738	} {
1739	ignore -font
1740	}
1741	itk_component add window {
1742	::scale $inner.window -from 0 -to 255 -orient horizontal \
1743	-variable [itcl::scope _settings(window)] \
1744	-showvalue off \
1745	-command [itcl::code $this AdjustSetting window]
1746	}
1747	itk_component add level_l {
1748	label $inner.level_l -text "Level" -font "Arial 9"
1749	} {
1750	ignore -font
1751	}
1752	itk_component add level {
1753	::scale $inner.level -from 0 -to 255 -orient horizontal \
1754	-variable [itcl::scope _settings(level)] \
1755	-showvalue off \
1756	-command [itcl::code $this AdjustSetting level]
1757	}
1758
1759	frame $inner.separator1 -height 2 -relief sunken -bd 1
1760	frame $inner.separator2 -height 2 -relief sunken -bd 1
1761
1762	blt::table $inner \
1763	0,0 $inner.field_l -anchor w -pady 2 \
1764	0,1 $inner.field -anchor w -pady 2 -fill x \
1765	1,0 $inner.colormap_l -anchor w -pady 2 \
1766	1,1 $inner.colormap -anchor w -pady 2 -fill x \
1767	2,0 $inner.backingcolor_l -anchor w -pady 2 \
1768	2,1 $inner.backingcolor -anchor w -pady 2 -fill x \
1769	3,0 $inner.background_l -anchor w -pady 2 \
1770	3,1 $inner.background -anchor w -pady 2 -fill x \
1771	4,0 $inner.backing -anchor w -pady 2 -cspan 2 \
1772	5,0 $inner.stretch -anchor w -pady 2 -cspan 2 \
1773	7,0 $inner.legend -anchor w -pady 2 -cspan 2 \
1774	8,0 $inner.colormapDiscrete -anchor w -pady 2 -cspan 2 \
1775	11,0 $inner.separator1 -padx 2 -fill x -cspan 2 \
1776	12,0 $inner.outline -anchor w -pady 2 -cspan 2 \
1777	13,0 $inner.separator2 -padx 2 -fill x -cspan 2 \
1778	15,0 $inner.opacity_l -anchor w -pady 2 \
1779	15,1 $inner.opacity -fill x -pady 2 \
1780	16,0 $inner.window_l -anchor w -pady 2 \
1781	16,1 $inner.window -fill x -pady 2 \
1782	17,0 $inner.level_l -anchor w -pady 2 \
1783	17,1 $inner.level -fill x -pady 2
1784
1785	blt::table configure $inner r* c* -resize none
1786	blt::table configure $inner r19 c1 -resize expand
1787	}
1788
1789	itcl::body Rappture::VtkImageViewer::BuildAxisTab {} {
1790
1791	set fg [option get $itk_component(hull) font Font]
1792	#set bfg [option get $itk_component(hull) boldFont Font]
1793
1794	set inner [$itk_component(main) insert end \
1795	-title "Axis Settings" \
1796	-icon [Rappture::icon axis2]]
1797	$inner configure -borderwidth 4
1798
1799	checkbutton $inner.visible \
1800	-text "Axes" \
1801	-variable [itcl::scope _settings(axisVisible)] \
1802	-command [itcl::code $this AdjustSetting axisVisible] \
1803	-font "Arial 9"
1804	checkbutton $inner.labels \
1805	-text "Axis Labels" \
1806	-variable [itcl::scope _settings(axisLabels)] \
1807	-command [itcl::code $this AdjustSetting axisLabels] \
1808	-font "Arial 9"
1809	label $inner.grid_l -text "Grid" -font "Arial 9"
1810	checkbutton $inner.xgrid \
1811	-text "X" \
1812	-variable [itcl::scope _settings(axisXGrid)] \
1813	-command [itcl::code $this AdjustSetting axisXGrid] \
1814	-font "Arial 9"
1815	checkbutton $inner.ygrid \
1816	-text "Y" \
1817	-variable [itcl::scope _settings(axisYGrid)] \
1818	-command [itcl::code $this AdjustSetting axisYGrid] \
1819	-font "Arial 9"
1820	checkbutton $inner.zgrid \
1821	-text "Z" \
1822	-variable [itcl::scope _settings(axisZGrid)] \
1823	-command [itcl::code $this AdjustSetting axisZGrid] \
1824	-font "Arial 9"
1825	checkbutton $inner.minorticks \
1826	-text "Minor Ticks" \
1827	-variable [itcl::scope _settings(axisMinorTicks)] \
1828	-command [itcl::code $this AdjustSetting axisMinorTicks] \
1829	-font "Arial 9"
1830
1831	label $inner.mode_l -text "Mode" -font "Arial 9"
1832
1833	itk_component add axisflymode {
1834	Rappture::Combobox $inner.mode -width 10 -editable no
1835	}
1836	$inner.mode choices insert end \
1837	"static_triad" "static" \
1838	"closest_triad" "closest" \
1839	"furthest_triad" "farthest" \
1840	"outer_edges" "outer"
1841	$itk_component(axisflymode) value "static"
1842	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting axisFlymode]
1843
1844	blt::table $inner \
1845	0,0 $inner.visible -anchor w -cspan 4 \
1846	1,0 $inner.labels -anchor w -cspan 4 \
1847	2,0 $inner.minorticks -anchor w -cspan 4 \
1848	4,0 $inner.grid_l -anchor w \
1849	4,1 $inner.xgrid -anchor w \
1850	4,2 $inner.ygrid -anchor w \
1851	4,3 $inner.zgrid -anchor w \
1852	5,0 $inner.mode_l -anchor w -padx { 2 0 } \
1853	5,1 $inner.mode -fill x -cspan 3
1854
1855	blt::table configure $inner r* c* -resize none
1856	blt::table configure $inner r7 c6 -resize expand
1857	blt::table configure $inner r3 -height 0.125i
1858	}
1859
1860
1861	itcl::body Rappture::VtkImageViewer::BuildCameraTab {} {
1862	set inner [$itk_component(main) insert end \
1863	-title "Camera Settings" \
1864	-icon [Rappture::icon camera]]
1865	$inner configure -borderwidth 4
1866
1867	label $inner.view_l -text "view" -font "Arial 9"
1868	set f [frame $inner.view]
1869	foreach side { front back left right top bottom } {
1870	button $f.$side -image [Rappture::icon view$side] \
1871	-command [itcl::code $this SetOrientation $side]
1872	Rappture::Tooltip::for $f.$side "Change the view to $side"
1873	pack $f.$side -side left
1874	}
1875
1876	blt::table $inner \
1877	0,0 $inner.view_l -anchor e -pady 2 \
1878	0,1 $inner.view -anchor w -pady 2
1879
1880	set labels { qx qy qz qw xpan ypan zoom }
1881	set row 1
1882	foreach tag $labels {
1883	label $inner.${tag}label -text $tag -font "Arial 9"
1884	entry $inner.${tag} -font "Arial 9" -bg white \
1885	-textvariable [itcl::scope _view($tag)]
1886	bind $inner.${tag} <Return> \
1887	[itcl::code $this camera set ${tag}]
1888	bind $inner.${tag} <KP_Enter> \
1889	[itcl::code $this camera set ${tag}]
1890	blt::table $inner \
1891	$row,0 $inner.${tag}label -anchor e -pady 2 \
1892	$row,1 $inner.${tag} -anchor w -pady 2
1893	blt::table configure $inner r$row -resize none
1894	incr row
1895	}
1896	checkbutton $inner.ortho \
1897	-text "Orthographic Projection" \
1898	-variable [itcl::scope _view(ortho)] \
1899	-command [itcl::code $this camera set ortho] \
1900	-font "Arial 9"
1901	blt::table $inner \
1902	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1903	blt::table configure $inner r$row -resize none
1904	incr row
1905
1906	blt::table configure $inner c* r* -resize none
1907	blt::table configure $inner c2 -resize expand
1908	blt::table configure $inner r$row -resize expand
1909	}
1910
1911	#
1912	# camera --
1913	#
1914	itcl::body Rappture::VtkImageViewer::camera {option args} {
1915	switch -- $option {
1916	"show" {
1917	puts [array get _view]
1918	}
1919	"set" {
1920	set who [lindex $args 0]
1921	set x $_view($who)
1922	set code [catch { string is double $x } result]
1923	if { $code != 0 \|\| !$result } {
1924	return
1925	}
1926	switch -- $who {
1927	"ortho" {
1928	if {$_view(ortho)} {
1929	SendCmd "camera mode ortho"
1930	} else {
1931	SendCmd "camera mode persp"
1932	}
1933	}
1934	"xpan" - "ypan" {
1935	PanCamera
1936	}
1937	"qx" - "qy" - "qz" - "qw" {
1938	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1939	$_arcball quaternion $q
1940	EventuallyRotate $q
1941	}
1942	"zoom" {
1943	SendCmd "camera zoom $_view(zoom)"
1944	}
1945	}
1946	}
1947	}
1948	}
1949
1950	itcl::body Rappture::VtkImageViewer::GetVtkData { args } {
1951	set bytes ""
1952	foreach dataobj [get] {
1953	foreach comp [$dataobj components] {
1954	set tag $dataobj-$comp
1955	set contents [$dataobj vtkdata $comp]
1956	append bytes "$contents\n"
1957	}
1958	}
1959	return [list .vtk $bytes]
1960	}
1961
1962	itcl::body Rappture::VtkImageViewer::GetImage { args } {
1963	if { [image width $_image(download)] > 0 &&
1964	[image height $_image(download)] > 0 } {
1965	set bytes [$_image(download) data -format "jpeg -quality 100"]
1966	set bytes [Rappture::encoding::decode -as b64 $bytes]
1967	return [list .jpg $bytes]
1968	}
1969	return ""
1970	}
1971
1972	itcl::body Rappture::VtkImageViewer::BuildDownloadPopup { popup command } {
1973	Rappture::Balloon $popup \
1974	-title "[Rappture::filexfer::label downloadWord] as..."
1975	set inner [$popup component inner]
1976	label $inner.summary -text "" -anchor w
1977	radiobutton $inner.vtk_button -text "VTK data file" \
1978	-variable [itcl::scope _downloadPopup(format)] \
1979	-font "Arial 9 " \
1980	-value vtk
1981	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
1982	radiobutton $inner.image_button -text "Image File" \
1983	-variable [itcl::scope _downloadPopup(format)] \
1984	-font "Arial 9 " \
1985	-value image
1986	Rappture::Tooltip::for $inner.image_button \
1987	"Save as digital image."
1988
1989	button $inner.ok -text "Save" \
1990	-highlightthickness 0 -pady 2 -padx 3 \
1991	-command $command \
1992	-compound left \
1993	-image [Rappture::icon download]
1994
1995	button $inner.cancel -text "Cancel" \
1996	-highlightthickness 0 -pady 2 -padx 3 \
1997	-command [list $popup deactivate] \
1998	-compound left \
1999	-image [Rappture::icon cancel]
2000
2001	blt::table $inner \
2002	0,0 $inner.summary -cspan 2 \
2003	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2004	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2005	4,1 $inner.cancel -width .9i -fill y \
2006	4,0 $inner.ok -padx 2 -width .9i -fill y
2007	blt::table configure $inner r3 -height 4
2008	blt::table configure $inner r4 -pady 4
2009	raise $inner.image_button
2010	$inner.vtk_button invoke
2011	return $inner
2012	}
2013
2014	#
2015	# SetObjectStyle --
2016	#
2017	# Set the style of the image/contour object. This gets calls
2018	# for each dataset once as it is loaded. It can overridden by
2019	# the user controls.
2020	#
2021	#
2022	itcl::body Rappture::VtkImageViewer::SetObjectStyle { dataobj comp } {
2023	# Parse style string.
2024	set tag $dataobj-$comp
2025	array set style {
2026	-color none
2027	-opacity 1.0
2028	}
2029	set stylelist [$dataobj style $comp]
2030	if { $stylelist != "" } {
2031	array set style $stylelist
2032	}
2033	# This is too complicated. We want to set the colormap, number of
2034	# isolines and opacity for the dataset. They can be the default values,
2035	# the style hints loaded with the dataset, or set by user controls. As
2036	# datasets get loaded, they first use the defaults that are overidden
2037	# by the style hints. If the user changes the global controls, then that
2038	# overrides everything else. I don't know what it means when global
2039	# controls are specified as style hints by each dataset. It complicates
2040	# the code to handle aberrant cases.
2041
2042	if { $_changed(opacity) } {
2043	set style(-opacity) [expr $_settings(opacity) * 0.01]
2044	}
2045	if { $_changed(colormap) } {
2046	set style(-color) $_settings(colormap)
2047	}
2048	if { $_currentColormap == "" } {
2049	$itk_component(colormap) value $style(-color)
2050	}
2051	if { [info exists style(-stretchtofit)] } {
2052	set _settings(stretchToFit) $style(-stretchtofit)
2053	AdjustSetting stretchToFit
2054	}
2055	SendCmd "outline add $tag"
2056	SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
2057	SendCmd "outline visible $_settings(outline) $tag"
2058	SendCmd "image add $tag"
2059	SetCurrentColormap $style(-color)
2060	set color [$itk_component(backingcolor) value]
2061	SendCmd "image color [Color2RGB $color] $tag"
2062	SendCmd "image opacity $style(-opacity) $tag"
2063	set _settings(opacity) [expr $style(-opacity) * 100.0]
2064	}
2065
2066	itcl::body Rappture::VtkImageViewer::IsValidObject { dataobj } {
2067	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2068	return 0
2069	}
2070	return 1
2071	}
2072
2073	# ----------------------------------------------------------------------
2074	# USAGE: ReceiveLegend <colormap> <title> <min> <max> <size>
2075	#
2076	# Invoked automatically whenever the "legend" command comes in from
2077	# the rendering server. Indicates that binary image data with the
2078	# specified <size> will follow.
2079	# ----------------------------------------------------------------------
2080	itcl::body Rappture::VtkImageViewer::ReceiveLegend { colormap title min max size } {
2081	#puts stderr "ReceiveLegend colormap=$colormap title=$title range=$min,$max size=$size"
2082	if { [isconnected] } {
2083	set bytes [ReceiveBytes $size]
2084	if { ![info exists _image(legend)] } {
2085	set _image(legend) [image create photo]
2086	}
2087	$_image(legend) configure -data $bytes
2088	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2089	if { [catch {DrawLegend} errs] != 0 } {
2090	global errorInfo
2091	puts stderr "errs=$errs errorInfo=$errorInfo"
2092	}
2093	}
2094	}
2095
2096	#
2097	# DrawLegend --
2098	#
2099	# Draws the legend in the own canvas on the right side of the plot area.
2100	#
2101	itcl::body Rappture::VtkImageViewer::DrawLegend {} {
2102	set fname $_curFldName
2103	set c $itk_component(view)
2104	set w [winfo width $c]
2105	set h [winfo height $c]
2106	set font "Arial 8"
2107	set lineht [font metrics $font -linespace]
2108
2109	if { [string match "component*" $fname] } {
2110	set title ""
2111	} else {
2112	if { [info exists _fields($fname)] } {
2113	foreach { title units } $_fields($fname) break
2114	if { $units != "" } {
2115	set title [format "%s (%s)" $title $units]
2116	}
2117	} else {
2118	set title $fname
2119	}
2120	}
2121	set x [expr $w - 2]
2122	if { !$_settings(legendVisible) } {
2123	$c delete legend
2124	return
2125	}
2126	if { [$c find withtag "legend"] == "" } {
2127	set y 2
2128	# If there's a legend title, create a text item for the title.
2129	$c create text $x $y \
2130	-anchor ne \
2131	-fill $itk_option(-plotforeground) -tags "title legend" \
2132	-font $font
2133	if { $title != "" } {
2134	incr y $lineht
2135	}
2136	$c create text $x $y \
2137	-anchor ne \
2138	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2139	-font $font
2140	incr y $lineht
2141	$c create image $x $y \
2142	-anchor ne \
2143	-image $_image(legend) -tags "colormap legend"
2144	$c create rectangle $x $y 1 1 \
2145	-fill "" -outline "" -tags "sensor legend"
2146	$c create text $x [expr {$h-2}] \
2147	-anchor se \
2148	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2149	-font $font
2150	$c bind sensor <Enter> [itcl::code $this EnterLegend %x %y]
2151	$c bind sensor <Leave> [itcl::code $this LeaveLegend]
2152	$c bind sensor <Motion> [itcl::code $this MotionLegend %x %y]
2153	}
2154
2155	set x2 $x
2156	set iw [image width $_image(legend)]
2157	set ih [image height $_image(legend)]
2158	set x1 [expr $x2 - ($iw*12)/10]
2159
2160	$c bind title <ButtonPress> [itcl::code $this Combo post]
2161	$c bind title <Enter> [itcl::code $this Combo activate]
2162	$c bind title <Leave> [itcl::code $this Combo deactivate]
2163	# Reset the item coordinates according the current size of the plot.
2164	if { [info exists _limits($_curFldName)] } {
2165	foreach { vmin vmax } $_limits($_curFldName) break
2166	$c itemconfigure vmin -text [format %g $vmin]
2167	$c itemconfigure vmax -text [format %g $vmax]
2168	}
2169	set y 2
2170	# If there's a legend title, move the title to the correct position
2171	if { $title != "" } {
2172	$c itemconfigure title -text $title
2173	$c coords title $x $y
2174	incr y $lineht
2175	}
2176	$c coords vmax $x $y
2177	incr y $lineht
2178	$c coords colormap $x $y
2179	$c coords sensor [expr $x - $iw] $y $x [expr $y + $ih]
2180	$c raise sensor
2181	$c coords vmin $x [expr {$h - 2}]
2182	}
2183
2184	#
2185	# EnterLegend --
2186	#
2187	itcl::body Rappture::VtkImageViewer::EnterLegend { x y } {
2188	SetLegendTip $x $y
2189	}
2190
2191	#
2192	# MotionLegend --
2193	#
2194	itcl::body Rappture::VtkImageViewer::MotionLegend { x y } {
2195	Rappture::Tooltip::tooltip cancel
2196	set c $itk_component(view)
2197	set cw [winfo width $c]
2198	set ch [winfo height $c]
2199	if { $x >= 0 && $x < $cw && $y >= 0 && $y < $ch } {
2200	SetLegendTip $x $y
2201	}
2202	}
2203
2204	#
2205	# LeaveLegend --
2206	#
2207	itcl::body Rappture::VtkImageViewer::LeaveLegend { } {
2208	Rappture::Tooltip::tooltip cancel
2209	.rappturetooltip configure -icon ""
2210	}
2211
2212	#
2213	# SetLegendTip --
2214	#
2215	itcl::body Rappture::VtkImageViewer::SetLegendTip { x y } {
2216	set fname $_curFldName
2217	set c $itk_component(view)
2218	set w [winfo width $c]
2219	set h [winfo height $c]
2220	set font "Arial 8"
2221	set lineht [font metrics $font -linespace]
2222
2223	set ih [image height $_image(legend)]
2224	# Subtract off the offset of the color ramp from the top of the canvas
2225	set iy [expr $y - ($lineht + 2)]
2226
2227	if { [string match "component*" $fname] } {
2228	set title ""
2229	} else {
2230	if { [info exists _fields($fname)] } {
2231	foreach { title units } $_fields($fname) break
2232	if { $units != "" } {
2233	set title [format "%s (%s)" $title $units]
2234	}
2235	} else {
2236	set title $fname
2237	}
2238	}
2239	# If there's a legend title, increase the offset by the line height.
2240	if { $title != "" } {
2241	incr iy -$lineht
2242	}
2243
2244	# Make a swatch of the selected color
2245	if { [catch { $_image(legend) get 10 $iy } pixel] != 0 } {
2246	return
2247	}
2248
2249	if { ![info exists _image(swatch)] } {
2250	set _image(swatch) [image create photo -width 24 -height 24]
2251	}
2252	set color [eval format "\#%02x%02x%02x" $pixel]
2253	$_image(swatch) put black -to 0 0 23 23
2254	$_image(swatch) put $color -to 1 1 22 22
2255
2256	# Compute the value of the point
2257	if { [info exists _limits($fname)] } {
2258	foreach { vmin vmax } $_limits($fname) break
2259	set t [expr 1.0 - (double($iy) / double($ih-1))]
2260	set value [expr $t * ($vmax - $vmin) + $vmin]
2261	} else {
2262	set value 0.0
2263	}
2264	set tipx [expr $x + 15]
2265	set tipy [expr $y - 5]
2266	.rappturetooltip configure -icon $_image(swatch)
2267	if { [info exists _isolines($y)] } {
2268	Rappture::Tooltip::text $c [format "$title %g (isoline)" $_isolines($y)]
2269	} else {
2270	Rappture::Tooltip::text $c [format "$title %g" $value]
2271	}
2272	Rappture::Tooltip::tooltip show $c +$tipx,+$tipy
2273	}
2274
2275	# ----------------------------------------------------------------------
2276	# USAGE: _dropdown post
2277	# USAGE: _dropdown unpost
2278	# USAGE: _dropdown select
2279	#
2280	# Used internally to handle the dropdown list for this combobox. The
2281	# post/unpost options are invoked when the list is posted or unposted
2282	# to manage the relief of the controlling button. The select option
2283	# is invoked whenever there is a selection from the list, to assign
2284	# the value back to the gauge.
2285	# ----------------------------------------------------------------------
2286	itcl::body Rappture::VtkImageViewer::Combo {option} {
2287	set c $itk_component(view)
2288	switch -- $option {
2289	post {
2290	foreach { x1 y1 x2 y2 } [$c bbox title] break
2291	set x1 [expr [winfo width $itk_component(view)] - [winfo reqwidth $itk_component(fieldmenu)]]
2292	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2293	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2294	tk_popup $itk_component(fieldmenu) $x $y
2295	}
2296	activate {
2297	$c itemconfigure title -fill red
2298	}
2299	deactivate {
2300	$c itemconfigure title -fill $itk_option(-plotforeground)
2301	}
2302	invoke {
2303	$itk_component(field) value $_curFldLabel
2304	AdjustSetting field
2305	}
2306	default {
2307	error "bad option \"$option\": should be post, unpost, select"
2308	}
2309	}
2310	}
2311
2312	itcl::body Rappture::VtkImageViewer::SetOrientation { side } {
2313	array set positions {
2314	front "0.707107 0.707107 0 0"
2315	back "0 0 0.707107 0.707107"
2316	left "0.5 0.5 -0.5 -0.5"
2317	right "0.5 0.5 0.5 0.5"
2318	top "1 0 0 0"
2319	bottom "0 1 0 0"
2320	}
2321	foreach name { qw qx qy qz } value $positions($side) {
2322	set _view($name) $value
2323	}
2324	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2325	$_arcball quaternion $q
2326	SendCmd "camera orient $q"
2327	SendCmd "camera reset"
2328	set _view(xpan) 0
2329	set _view(ypan) 0
2330	set _view(zoom) 1.0
2331	}

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