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source: branches/1.4/gui/scripts/vtkimageviewer.tcl @ 5172

Last change on this file since 5172 was 5172, checked in by ldelgass, 10 years ago
merge r5156 from trunk
File size: 78.6 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	# The following methods are only used by this class.
66	private method AdjustSetting {what {value ""}}
67	private method BuildAxisTab {}
68	private method BuildCameraTab {}
69	private method BuildColormap { name }
70	private method BuildImageTab {}
71	private method BuildDownloadPopup { widget command }
72	private method Combo { option }
73	private method Connect {}
74	private method CurrentDatasets {args}
75	private method Disconnect {}
76	private method DoResize {}
77	private method DoRotate {}
78	private method DrawLegend {}
79	private method EnterLegend { x y }
80	private method EventuallyRequestLegend {}
81	private method EventuallyResize { w h }
82	private method EventuallyRotate { q }
83	private method GetImage { args }
84	private method GetVtkData { args }
85	private method InitSettings { args }
86	private method IsValidObject { dataobj }
87	private method LeaveLegend {}
88	private method MotionLegend { x y }
89	private method Pan {option x y}
90	private method PanCamera {}
91	private method Pick {x y}
92	private method QuaternionToView { q } {
93	foreach { _view(-qw) _view(-qx) _view(-qy) _view(-qz) } $q break
94	}
95	private method Rebuild {}
96	private method ReceiveDataset { args }
97	private method ReceiveImage { args }
98	private method ReceiveLegend { colormap title min max size }
99	private method RequestLegend {}
100	private method Rotate {option x y}
101	private method SetCurrentColormap { color }
102	private method SetLegendTip { x y }
103	private method SetObjectStyle { dataobj comp }
104	private method SetOrientation { side }
105	private method ViewToQuaternion {} {
106	return [list $_view(-qw) $_view(-qx) $_view(-qy) $_view(-qz)]
107	}
108	private method Zoom {option}
109
110	private variable _arcball ""
111	private variable _dlist "" ; # list of data objects
112	private variable _obj2datasets
113	private variable _obj2ovride ; # maps dataobj => style override
114	private variable _datasets ; # contains all the dataobj-component
115	; # datasets in the server
116	private variable _colormaps ; # contains all the colormaps
117	; # in the server.
118
119	# The name of the current colormap used. The colormap is global to all
120	# images displayed.
121	private variable _currentColormap ""
122	private variable _currentNumIsolines -1
123
124	private variable _maxScale 100; # This is the # of times the x-axis
125	# and y-axis ranges can differ before
126	# automatically turning on
127	# -stretchtofit
128
129	private variable _click ; # info used for rotate operations
130	private variable _limits ; # Holds overall limits for all dataobjs
131	# using the viewer.
132	private variable _view ; # view params for 3D view
133	private variable _settings
134	private variable _changed
135	private variable _initialStyle ""; # First found style in dataobjects.
136	private variable _reset 1; # Connection to server has been reset.
137
138	private variable _first "" ; # This is the topmost dataset.
139	private variable _start 0
140	private variable _isolines
141	private variable _contourList ""
142
143	common _downloadPopup; # download options from popup
144	private common _hardcopy
145	private variable _width 0
146	private variable _height 0
147	private variable _legendWidth 0
148	private variable _legendHeight 0
149	private variable _resizePending 0
150	private variable _rotatePending 0
151	private variable _legendPending 0
152	private variable _fieldNames {}
153	private variable _fields
154	private variable _curFldName ""
155	private variable _curFldLabel ""
156	private variable _colorMode "scalar";# Mode of colormap (vmag or scalar)
157	}
158
159	itk::usual VtkImageViewer {
160	keep -background -foreground -cursor -font
161	keep -plotbackground -plotforeground -mode
162	}
163
164	# ----------------------------------------------------------------------
165	# CONSTRUCTOR
166	# ----------------------------------------------------------------------
167	itcl::body Rappture::VtkImageViewer::constructor {hostlist args} {
168	set _serverType "vtkvis"
169
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	-ortho 0
199	-qw 0.36
200	-qx 0.25
201	-qy 0.50
202	-qz 0.70
203	-xpan 0
204	-ypan 0
205	-zoom 1.0
206	}
207	set _arcball [blt::arcball create 100 100]
208	$_arcball quaternion [ViewToQuaternion]
209
210	array set _settings {
211	-axisflymode "static"
212	-axislabels 1
213	-axisminorticks 1
214	-axisvisible 1
215	-backingcolor white
216	-backingvisible 1
217	-colormapdiscrete 0
218	-field "Default"
219	-legendvisible 0
220	-level 127.5
221	-numcolors 256
222	-opacity 100
223	-outline 0
224	-saveopacity 100
225	-stretchtofit 0
226	-view3d 0
227	-window 255.0
228	-xgrid 0
229	-ygrid 0
230	-zgrid 0
231	}
232	array set _changed {
233	-colormap 0
234	-opacity 0
235	}
236	itk_component add view {
237	canvas $itk_component(plotarea).view \
238	-highlightthickness 0 -borderwidth 0
239	} {
240	usual
241	ignore -highlightthickness -borderwidth -background
242	}
243
244	itk_component add fieldmenu {
245	menu $itk_component(plotarea).menu \
246	-relief flat \
247	-tearoff no
248	} {
249	usual
250	ignore -background -foreground -relief -tearoff
251	}
252	set c $itk_component(view)
253	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
254	bind $c <4> [itcl::code $this Zoom in 0.25]
255	bind $c <5> [itcl::code $this Zoom out 0.25]
256	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
257	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
258	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
259	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
260	bind $c <Enter> "focus %W"
261	bind $c <Control-F1> [itcl::code $this ToggleConsole]
262
263	# Fix the scrollregion in case we go off screen
264	$c configure -scrollregion [$c bbox all]
265
266	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
267	set _map(cwidth) -1
268	set _map(cheight) -1
269	set _map(zoom) 1.0
270	set _map(original) ""
271
272	set f [$itk_component(main) component controls]
273	itk_component add reset {
274	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
275	-highlightthickness 0 \
276	-image [Rappture::icon reset-view] \
277	-command [itcl::code $this Zoom reset]
278	} {
279	usual
280	ignore -highlightthickness
281	}
282	pack $itk_component(reset) -side top -padx 2 -pady { 2 0 }
283	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
284
285	itk_component add zoomin {
286	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
287	-highlightthickness 0 \
288	-image [Rappture::icon zoom-in] \
289	-command [itcl::code $this Zoom in]
290	} {
291	usual
292	ignore -highlightthickness
293	}
294	pack $itk_component(zoomin) -side top -padx 2 -pady { 2 0 }
295	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
296
297	itk_component add zoomout {
298	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
299	-highlightthickness 0 \
300	-image [Rappture::icon zoom-out] \
301	-command [itcl::code $this Zoom out]
302	} {
303	usual
304	ignore -highlightthickness
305	}
306	pack $itk_component(zoomout) -side top -padx 2 -pady { 2 0 }
307	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
308
309	itk_component add mode {
310	Rappture::PushButton $f.mode \
311	-onimage [Rappture::icon surface] \
312	-offimage [Rappture::icon surface] \
313	-variable [itcl::scope _settings(-view3d)] \
314	-command [itcl::code $this AdjustSetting -view3d] \
315	}
316	Rappture::Tooltip::for $itk_component(mode) \
317	"Toggle the surface/contour on/off"
318	pack $itk_component(mode) -padx 2 -pady { 2 0 }
319
320	itk_component add stretchtofit {
321	Rappture::PushButton $f.stretchtofit \
322	-onimage [Rappture::icon stretchtofit] \
323	-offimage [Rappture::icon stretchtofit] \
324	-variable [itcl::scope _settings(-stretchtofit)] \
325	-command [itcl::code $this AdjustSetting -stretchtofit] \
326	}
327	Rappture::Tooltip::for $itk_component(stretchtofit) \
328	"Stretch plot to fit window on/off"
329	pack $itk_component(stretchtofit) -padx 2 -pady 2
330
331	if { [catch {
332	BuildImageTab
333	BuildAxisTab
334	BuildCameraTab
335	} errs] != 0 } {
336	global errorInfo
337	puts stderr "errs=$errs errorInfo=$errorInfo"
338	}
339
340	# Hack around the Tk panewindow. The problem is that the requested
341	# size of the 3d view isn't set until an image is retrieved from
342	# the server. So the panewindow uses the tiny size.
343	set w 10000
344	pack forget $itk_component(view)
345	blt::table $itk_component(plotarea) \
346	0,0 $itk_component(view) -fill both -reqwidth $w
347	blt::table configure $itk_component(plotarea) c1 -resize none
348
349	# Bindings for panning via mouse
350	bind $itk_component(view) <ButtonPress-2> \
351	[itcl::code $this Pan click %x %y]
352	bind $itk_component(view) <B2-Motion> \
353	[itcl::code $this Pan drag %x %y]
354	bind $itk_component(view) <ButtonRelease-2> \
355	[itcl::code $this Pan release %x %y]
356
357	#bind $itk_component(view) <ButtonRelease-3> \
358	# [itcl::code $this Pick %x %y]
359
360	# Bindings for panning via keyboard
361	bind $itk_component(view) <KeyPress-Left> \
362	[itcl::code $this Pan set -10 0]
363	bind $itk_component(view) <KeyPress-Right> \
364	[itcl::code $this Pan set 10 0]
365	bind $itk_component(view) <KeyPress-Up> \
366	[itcl::code $this Pan set 0 -10]
367	bind $itk_component(view) <KeyPress-Down> \
368	[itcl::code $this Pan set 0 10]
369	bind $itk_component(view) <Shift-KeyPress-Left> \
370	[itcl::code $this Pan set -2 0]
371	bind $itk_component(view) <Shift-KeyPress-Right> \
372	[itcl::code $this Pan set 2 0]
373	bind $itk_component(view) <Shift-KeyPress-Up> \
374	[itcl::code $this Pan set 0 -2]
375	bind $itk_component(view) <Shift-KeyPress-Down> \
376	[itcl::code $this Pan set 0 2]
377
378	# Bindings for zoom via keyboard
379	bind $itk_component(view) <KeyPress-Prior> \
380	[itcl::code $this Zoom out]
381	bind $itk_component(view) <KeyPress-Next> \
382	[itcl::code $this Zoom in]
383
384	bind $itk_component(view) <Enter> "focus $itk_component(view)"
385
386	if {[string equal "x11" [tk windowingsystem]]} {
387	# Bindings for zoom via mouse
388	bind $itk_component(view) <4> [itcl::code $this Zoom out]
389	bind $itk_component(view) <5> [itcl::code $this Zoom in]
390	}
391
392	set _image(download) [image create photo]
393
394	eval itk_initialize $args
395
396	EnableWaitDialog 900
397	Connect
398	}
399
400	# ----------------------------------------------------------------------
401	# DESTRUCTOR
402	# ----------------------------------------------------------------------
403	itcl::body Rappture::VtkImageViewer::destructor {} {
404	Disconnect
405	image delete $_image(plot)
406	image delete $_image(download)
407	catch { blt::arcball destroy $_arcball }
408	}
409
410	itcl::body Rappture::VtkImageViewer::DoResize {} {
411	if { $_width < 2 } {
412	set _width 500
413	}
414	if { $_height < 2 } {
415	set _height 500
416	}
417	set _start [clock clicks -milliseconds]
418	SendCmd "screen size [expr $_width - 20] $_height"
419
420	set font "Arial 8"
421	set lh [font metrics $font -linespace]
422	set h [expr {$_height - 2 * ($lh + 2)}]
423	if { $h != $_legendHeight } {
424	EventuallyRequestLegend
425	} else {
426	DrawLegend
427	}
428	set _resizePending 0
429	}
430
431	itcl::body Rappture::VtkImageViewer::DoRotate {} {
432	SendCmd "camera orient [ViewToQuaternion]"
433	set _rotatePending 0
434	}
435
436	itcl::body Rappture::VtkImageViewer::EventuallyRequestLegend {} {
437	if { !$_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	QuaternionToView $q
457	if { !$_rotatePending } {
458	set _rotatePending 1
459	global rotate_delay
460	$_dispatcher event -after $rotate_delay !rotate
461	}
462	}
463
464	# ----------------------------------------------------------------------
465	# USAGE: add <dataobj> ?<settings>?
466	#
467	# Clients use this to add a data object to the plot. The optional
468	# <settings> are used to configure the plot. Allowed settings are
469	# -color, -brightness, -width, -linestyle, and -raise.
470	# ----------------------------------------------------------------------
471	itcl::body Rappture::VtkImageViewer::add {dataobj {settings ""}} {
472	if { ![$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 _hosts [GetServerList "vtkvis"]
736	if { "" == $_hosts } {
737	return 0
738	}
739	set _reset 1
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	fconfigure $f -encoding binary
833	puts -nonewline $f $bytes
834	close $f
835	}
836	$_image(plot) configure -data $bytes
837	set time [clock seconds]
838	set date [clock format $time]
839	#puts stderr "$date: received image [image width $_image(plot)]x[image height $_image(plot)] image>"
840	if { $_start > 0 } {
841	set finish [clock clicks -milliseconds]
842	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
843	set _start 0
844	}
845	} elseif { $info(type) == "print" } {
846	set tag $this-print-$info(-token)
847	set _hardcopy($tag) $bytes
848	}
849	}
850
851	#
852	# ReceiveDataset --
853	#
854	itcl::body Rappture::VtkImageViewer::ReceiveDataset { args } {
855	if { ![isconnected] } {
856	return
857	}
858	set option [lindex $args 0]
859	switch -- $option {
860	"scalar" {
861	set option [lindex $args 1]
862	switch -- $option {
863	"world" {
864	foreach { x y z value tag } [lrange $args 2 end] break
865	}
866	"pixel" {
867	foreach { x y value tag } [lrange $args 2 end] break
868	}
869	}
870	}
871	"vector" {
872	set option [lindex $args 1]
873	switch -- $option {
874	"world" {
875	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
876	}
877	"pixel" {
878	foreach { x y vx vy vz tag } [lrange $args 2 end] break
879	}
880	}
881	}
882	"names" {
883	foreach { name } [lindex $args 1] {
884	#puts stderr "Dataset: $name"
885	}
886	}
887	default {
888	error "unknown dataset option \"$option\" from server"
889	}
890	}
891	}
892
893	# ----------------------------------------------------------------------
894	# USAGE: Rebuild
895	#
896	# Called automatically whenever something changes that affects the
897	# data in the widget. Clears any existing data and rebuilds the
898	# widget to display new data.
899	# ----------------------------------------------------------------------
900	itcl::body Rappture::VtkImageViewer::Rebuild {} {
901	set w [winfo width $itk_component(view)]
902	set h [winfo height $itk_component(view)]
903	if { $w < 2 \|\| $h < 2 } {
904	update
905	$_dispatcher event -idle !rebuild
906	return
907	}
908
909	# Turn on buffering of commands to the server. We don't want to
910	# be preempted by a server disconnect/reconnect (which automatically
911	# generates a new call to Rebuild).
912	StartBufferingCommands
913
914	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
915	set _width $w
916	set _height $h
917	$_arcball resize $w $h
918	DoResize
919	if { $_settings(-stretchtofit) } {
920	AdjustSetting -stretchToFit
921	}
922	}
923	if { $_reset } {
924	#
925	# Reset the camera and other view parameters
926	#
927	InitSettings -view3d -background
928
929	SendCmd "axis lrot z 90"
930	$_arcball quaternion [ViewToQuaternion]
931	if {$_settings(-view3d) } {
932	if { $_view(-ortho)} {
933	SendCmd "camera mode ortho"
934	} else {
935	SendCmd "camera mode persp"
936	}
937	DoRotate
938	SendCmd "camera reset"
939	}
940	PanCamera
941	StopBufferingCommands
942	SendCmd "imgflush"
943	StartBufferingCommands
944	}
945
946	set _first ""
947	# Start off with no datasets are visible.
948	SendCmd "dataset visible 0"
949	foreach dataobj [get -objects] {
950	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
951	set _first $dataobj
952	}
953	set _obj2datasets($dataobj) ""
954	foreach comp [$dataobj components] {
955	set tag $dataobj-$comp
956	if { ![info exists _datasets($tag)] } {
957	set bytes [$dataobj vtkdata $comp]
958	if 0 {
959	set f [open /tmp/vtkimage.vtk "w"]
960	fconfigure $f -translation binary -encoding binary
961	puts -nonewline $f $bytes
962	close $f
963	}
964	set length [string length $bytes]
965	if { $_reportClientInfo } {
966	set info {}
967	lappend info "tool_id" [$dataobj hints toolid]
968	lappend info "tool_name" [$dataobj hints toolname]
969	lappend info "tool_title" [$dataobj hints tooltitle]
970	lappend info "tool_command" [$dataobj hints toolcommand]
971	lappend info "tool_revision" [$dataobj hints toolrevision]
972	lappend info "dataset_label" [$dataobj hints label]
973	lappend info "dataset_size" $length
974	lappend info "dataset_tag" $tag
975	SendCmd "clientinfo [list $info]"
976	}
977	SendCmd "dataset add $tag data follows $length"
978	SendData $bytes
979	set _datasets($tag) 1
980	SetObjectStyle $dataobj $comp
981	}
982	lappend _obj2datasets($dataobj) $tag
983	if { [info exists _obj2ovride($dataobj-raise)] } {
984	# Setting dataset visible enables outline
985	# and image
986	SendCmd "dataset visible 1 $tag"
987	}
988	}
989	}
990	if { $_first != "" } {
991	$itk_component(field) choices delete 0 end
992	$itk_component(fieldmenu) delete 0 end
993	array unset _fields
994	set _curFldName ""
995	foreach cname [$_first components] {
996	foreach fname [$_first fieldnames $cname] {
997	if { [info exists _fields($fname)] } {
998	continue
999	}
1000	foreach { label units components } \
1001	[$_first fieldinfo $fname] break
1002	$itk_component(field) choices insert end "$fname" "$label"
1003	$itk_component(fieldmenu) add radiobutton -label "$label" \
1004	-value $label -variable [itcl::scope _curFldLabel] \
1005	-selectcolor red \
1006	-activebackground $itk_option(-plotbackground) \
1007	-activeforeground $itk_option(-plotforeground) \
1008	-font "Arial 8" \
1009	-command [itcl::code $this Combo invoke]
1010	set _fields($fname) [list $label $units $components]
1011	if { $_curFldName == "" } {
1012	set _curFldName $fname
1013	set _curFldLabel $label
1014	}
1015	}
1016	}
1017	$itk_component(field) value $_curFldLabel
1018	}
1019	InitSettings -stretchtofit -outline
1020
1021	if { $_reset } {
1022	SendCmd "axis tickpos outside"
1023	#SendCmd "axis lformat all %g"
1024
1025	foreach axis { x y z } {
1026	set label ""
1027	if { $_first != "" } {
1028	set label [$_first hints ${axis}label]
1029	}
1030	if { $label == "" } {
1031	set label [string toupper $axis]
1032	}
1033	# May be a space in the axis label.
1034	SendCmd [list axis name $axis $label]
1035
1036	set units ""
1037	if { $_first != "" } {
1038	if {$axis == "z" && [$_first hints ${axis}units] == ""} {
1039	if {$_curFldName != ""} {
1040	set units [lindex $_fields($_curFldName) 1]
1041	}
1042	} else {
1043	set units [$_first hints ${axis}units]
1044	}
1045	}
1046	if { $units != "" } {
1047	# May be a space in the axis units.
1048	SendCmd [list axis units $axis $units]
1049	}
1050	}
1051	#
1052	# Reset the camera and other view parameters
1053	#
1054	$_arcball quaternion [ViewToQuaternion]
1055	if {$_settings(-view3d) } {
1056	if { $_view(-ortho)} {
1057	SendCmd "camera mode ortho"
1058	} else {
1059	SendCmd "camera mode persp"
1060	}
1061	DoRotate
1062	SendCmd "camera reset"
1063	}
1064	PanCamera
1065	InitSettings -xgrid -ygrid -zgrid \
1066	-axisvisible -axislabels -field -view3d
1067	if { [array size _fields] < 2 } {
1068	catch {blt::table forget $itk_component(field) $itk_component(field_l)}
1069	}
1070	RequestLegend
1071	set _reset 0
1072	}
1073	global readyForNextFrame
1074	set readyForNextFrame 0; # Don't advance to the next frame
1075
1076	# Actually write the commands to the server socket. If it fails, we don't
1077	# care. We're finished here.
1078	blt::busy hold $itk_component(hull)
1079	StopBufferingCommands
1080	blt::busy release $itk_component(hull)
1081	}
1082
1083	# ----------------------------------------------------------------------
1084	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1085	#
1086	# Returns a list of server IDs for the current datasets being displayed. This
1087	# is normally a single ID, but it might be a list of IDs if the current data
1088	# object has multiple components.
1089	# ----------------------------------------------------------------------
1090	itcl::body Rappture::VtkImageViewer::CurrentDatasets {args} {
1091	set flag [lindex $args 0]
1092	switch -- $flag {
1093	"-all" {
1094	if { [llength $args] > 1 } {
1095	error "CurrentDatasets: can't specify dataobj after \"-all\""
1096	}
1097	set dlist [get -objects]
1098	}
1099	"-visible" {
1100	if { [llength $args] > 1 } {
1101	set dlist {}
1102	set args [lrange $args 1 end]
1103	foreach dataobj $args {
1104	if { [info exists _obj2ovride($dataobj-raise)] } {
1105	lappend dlist $dataobj
1106	}
1107	}
1108	} else {
1109	set dlist [get -visible]
1110	}
1111	}
1112	default {
1113	set dlist $args
1114	}
1115	}
1116	set rlist ""
1117	foreach dataobj $dlist {
1118	foreach comp [$dataobj components] {
1119	set tag $dataobj-$comp
1120	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1121	lappend rlist $tag
1122	}
1123	}
1124	}
1125	return $rlist
1126	}
1127
1128	# ----------------------------------------------------------------------
1129	# USAGE: Zoom in
1130	# USAGE: Zoom out
1131	# USAGE: Zoom reset
1132	#
1133	# Called automatically when the user clicks on one of the zoom
1134	# controls for this widget. Changes the zoom for the current view.
1135	# ----------------------------------------------------------------------
1136	itcl::body Rappture::VtkImageViewer::Zoom {option} {
1137	switch -- $option {
1138	"in" {
1139	set _view(-zoom) [expr {$_view(-zoom)*1.25}]
1140	SendCmd "camera zoom $_view(-zoom)"
1141	}
1142	"out" {
1143	set _view(-zoom) [expr {$_view(-zoom)*0.8}]
1144	SendCmd "camera zoom $_view(-zoom)"
1145	}
1146	"reset" {
1147	array set _view {
1148	-qw 0.36
1149	-qx 0.25
1150	-qy 0.50
1151	-qz 0.70
1152	-xpan 0
1153	-ypan 0
1154	-zoom 1.0
1155	}
1156	if { $_first != "" } {
1157	set location [$_first hints camera]
1158	if { $location != "" } {
1159	array set _view $location
1160	}
1161	}
1162	$_arcball quaternion [ViewToQuaternion]
1163	if {$_settings(-view3d) } {
1164	DoRotate
1165	}
1166	SendCmd "camera reset"
1167	}
1168	}
1169	}
1170
1171	itcl::body Rappture::VtkImageViewer::PanCamera {} {
1172	set x $_view(-xpan)
1173	set y $_view(-ypan)
1174	SendCmd "camera pan $x $y"
1175	}
1176
1177
1178	# ----------------------------------------------------------------------
1179	# USAGE: Rotate click <x> <y>
1180	# USAGE: Rotate drag <x> <y>
1181	# USAGE: Rotate release <x> <y>
1182	#
1183	# Called automatically when the user clicks/drags/releases in the
1184	# plot area. Moves the plot according to the user's actions.
1185	# ----------------------------------------------------------------------
1186	itcl::body Rappture::VtkImageViewer::Rotate {option x y} {
1187	switch -- $option {
1188	"click" {
1189	$itk_component(view) configure -cursor fleur
1190	set _click(x) $x
1191	set _click(y) $y
1192	}
1193	"drag" {
1194	if {[array size _click] == 0} {
1195	Rotate click $x $y
1196	} else {
1197	set w [winfo width $itk_component(view)]
1198	set h [winfo height $itk_component(view)]
1199	if {$w <= 0 \|\| $h <= 0} {
1200	return
1201	}
1202
1203	if {[catch {
1204	# this fails sometimes for no apparent reason
1205	set dx [expr {double($x-$_click(x))/$w}]
1206	set dy [expr {double($y-$_click(y))/$h}]
1207	}]} {
1208	return
1209	}
1210	if { $dx == 0 && $dy == 0 } {
1211	return
1212	}
1213	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1214	EventuallyRotate $q
1215	set _click(x) $x
1216	set _click(y) $y
1217	}
1218	}
1219	"release" {
1220	Rotate drag $x $y
1221	$itk_component(view) configure -cursor ""
1222	catch {unset _click}
1223	}
1224	default {
1225	error "bad option \"$option\": should be click, drag, release"
1226	}
1227	}
1228	}
1229
1230	itcl::body Rappture::VtkImageViewer::Pick {x y} {
1231	foreach tag [CurrentDatasets -visible] {
1232	SendCmd "dataset getscalar pixel $x $y $tag"
1233	}
1234	}
1235
1236	# ----------------------------------------------------------------------
1237	# USAGE: $this Pan click x y
1238	# $this Pan drag x y
1239	# $this Pan release x y
1240	#
1241	# Called automatically when the user clicks on one of the zoom
1242	# controls for this widget. Changes the zoom for the current view.
1243	# ----------------------------------------------------------------------
1244	itcl::body Rappture::VtkImageViewer::Pan {option x y} {
1245	switch -- $option {
1246	"set" {
1247	set w [winfo width $itk_component(view)]
1248	set h [winfo height $itk_component(view)]
1249	set x [expr $x / double($w)]
1250	set y [expr $y / double($h)]
1251	set _view(-xpan) [expr $_view(-xpan) + $x]
1252	set _view(-ypan) [expr $_view(-ypan) + $y]
1253	PanCamera
1254	return
1255	}
1256	"click" {
1257	set _click(x) $x
1258	set _click(y) $y
1259	$itk_component(view) configure -cursor hand1
1260	}
1261	"drag" {
1262	if { ![info exists _click(x)] } {
1263	set _click(x) $x
1264	}
1265	if { ![info exists _click(y)] } {
1266	set _click(y) $y
1267	}
1268	set w [winfo width $itk_component(view)]
1269	set h [winfo height $itk_component(view)]
1270	set dx [expr ($_click(x) - $x)/double($w)]
1271	set dy [expr ($_click(y) - $y)/double($h)]
1272	set _click(x) $x
1273	set _click(y) $y
1274	set _view(-xpan) [expr $_view(-xpan) - $dx]
1275	set _view(-ypan) [expr $_view(-ypan) - $dy]
1276	PanCamera
1277	}
1278	"release" {
1279	Pan drag $x $y
1280	$itk_component(view) configure -cursor ""
1281	}
1282	default {
1283	error "unknown option \"$option\": should set, click, drag, or release"
1284	}
1285	}
1286	}
1287
1288	# ----------------------------------------------------------------------
1289	# USAGE: InitSettings <what> ?<value>?
1290	#
1291	# Used internally to update rendering settings whenever parameters
1292	# change in the popup settings panel. Sends the new settings off
1293	# to the back end.
1294	# ----------------------------------------------------------------------
1295	itcl::body Rappture::VtkImageViewer::InitSettings { args } {
1296	foreach spec $args {
1297	if { [info exists _settings($_first${spec})] } {
1298	# Reset global setting with dataobj specific setting
1299	set _settings($spec) $_settings($_first${spec})
1300	}
1301	AdjustSetting $spec
1302	}
1303	}
1304
1305	#
1306	# AdjustSetting --
1307	#
1308	# Changes/updates a specific setting in the widget. There are
1309	# usually user-setable option. Commands are sent to the render
1310	# server.
1311	#
1312	itcl::body Rappture::VtkImageViewer::AdjustSetting {what {value ""}} {
1313	if { ![isconnected] } {
1314	return
1315	}
1316	switch -- $what {
1317	"-axisflymode" {
1318	set mode [$itk_component(axisflymode) value]
1319	set mode [$itk_component(axisflymode) translate $mode]
1320	set _settings($what) $mode
1321	SendCmd "axis flymode $mode"
1322	}
1323	"-axislabels" {
1324	set bool $_settings($what)
1325	SendCmd "axis labels all $bool"
1326	}
1327	"-axisminorticks" {
1328	set bool $_settings($what)
1329	SendCmd "axis minticks all $bool"
1330	}
1331	"-axisvisible" {
1332	set bool $_settings($what)
1333	SendCmd "axis visible all $bool"
1334	}
1335	"-background" {
1336	set bg [$itk_component(background) value]
1337	array set fgcolors {
1338	"black" "white"
1339	"white" "black"
1340	"grey" "black"
1341	}
1342	set fg $fgcolors($bg)
1343	configure -plotbackground $bg -plotforeground $fg
1344	$itk_component(view) delete "legend"
1345	SendCmd "screen bgcolor [Color2RGB $bg]"
1346	SendCmd "outline color [Color2RGB $fg]"
1347	SendCmd "axis color all [Color2RGB $fg]"
1348	DrawLegend
1349	}
1350	"-backingcolor" {
1351	set color [$itk_component(backingcolor) value]
1352	if { $color == "none" } {
1353	if { $_settings(-backingvisible) } {
1354	SendCmd "image backing 0"
1355	set _settings(-backingvisible) 0
1356	}
1357	} else {
1358	if { !$_settings(-backingvisible) } {
1359	SendCmd "image backing 1"
1360	set _settings(-backingvisible) 1
1361	}
1362	SendCmd "image color [Color2RGB $color]"
1363	}
1364	}
1365	"-backingvisible" {
1366	set bool $_settings($what)
1367	SendCmd "image backing $bool"
1368	}
1369	"-colormap" {
1370	set _changed($what) 1
1371	StartBufferingCommands
1372	set color [$itk_component(colormap) value]
1373	set _settings($what) $color
1374	SetCurrentColormap $color
1375	if {$_settings(-colormapdiscrete)} {
1376	SendCmd "colormap res $_settings(-numcolors) $color"
1377	}
1378	StopBufferingCommands
1379	EventuallyRequestLegend
1380	}
1381	"-colormapdiscrete" {
1382	set bool $_settings($what)
1383	StartBufferingCommands
1384	if {$bool} {
1385	SendCmd "colormap res $_settings(-numcolors)"
1386	} else {
1387	SendCmd "colormap res default"
1388	}
1389	StopBufferingCommands
1390	EventuallyRequestLegend
1391	}
1392	"-field" {
1393	set label [$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
1410	# Get the new limits because the field changed.
1411	SendCmd "dataset scalar $_curFldName"
1412	#SendCmd "image colormode scalar $_curFldName"
1413	SendCmd "camera reset"
1414	DrawLegend
1415	}
1416	"-view3d" {
1417	set bool $_settings($what)
1418	set c $itk_component(view)
1419	StartBufferingCommands
1420	# Fix image scale: 0 for contours, 1 for images.
1421	if { $bool } {
1422	set _settings(-opacity) $_settings(-saveopacity)
1423	} else {
1424	set _settings(-opacity) 100
1425	}
1426	AdjustSetting -opacity
1427	if { $bool } {
1428	$itk_component(opacity) configure -state normal
1429	$itk_component(opacity_l) configure -state normal
1430	if {$_view(-ortho)} {
1431	SendCmd "camera mode ortho"
1432	} else {
1433	SendCmd "camera mode persp"
1434	}
1435	SendCmd "camera aspect native"
1436	} else {
1437	$itk_component(opacity) configure -state disabled
1438	$itk_component(opacity_l) configure -state disabled
1439	SendCmd "camera mode image"
1440	if {$_settings(-stretchtofit)} {
1441	SendCmd "camera aspect window"
1442	}
1443	}
1444	if { $bool } {
1445	set q [ViewToQuaternion]
1446	$_arcball quaternion $q
1447	SendCmd "camera orient $q"
1448	} else {
1449	bind $c <ButtonPress-1> {}
1450	bind $c <B1-Motion> {}
1451	bind $c <ButtonRelease-1> {}
1452	}
1453	SendCmd "camera reset"
1454	# Fix the mouse bindings for rotation/panning and the
1455	# camera mode. Ideally we'd create a bindtag for these.
1456	if { $bool } {
1457	# Bindings for rotation via mouse
1458	bind $c <ButtonPress-1> \
1459	[itcl::code $this Rotate click %x %y]
1460	bind $c <B1-Motion> \
1461	[itcl::code $this Rotate drag %x %y]
1462	bind $c <ButtonRelease-1> \
1463	[itcl::code $this Rotate release %x %y]
1464	}
1465	StopBufferingCommands
1466	}
1467	"-window" {
1468	set val $_settings($what)
1469	SendCmd "image window $val"
1470	}
1471	"-level" {
1472	set val $_settings($what)
1473	SendCmd "image level $val"
1474	}
1475	"-legendvisible" {
1476	if { !$_settings($what) } {
1477	$itk_component(view) delete legend
1478	}
1479	DrawLegend
1480	}
1481	"-opacity" {
1482	set _changed($what) 1
1483	if { $_settings(-view3d) } {
1484	set _settings(-saveopacity) $_settings($what)
1485	set val [expr $_settings($what) * 0.01]
1486	SendCmd "image opacity $val"
1487	} else {
1488	SendCmd "image opacity 1.0"
1489	}
1490	}
1491	"-outline" {
1492	set bool $_settings($what)
1493	SendCmd "outline visible $bool"
1494	}
1495	"-stretchtofit" {
1496	set bool $_settings($what)
1497	if { $bool } {
1498	if { $_settings(-view3d) } {
1499	SendCmd "camera aspect native"
1500	} else {
1501	SendCmd "camera aspect window"
1502	}
1503	} else {
1504	SendCmd "camera aspect native"
1505	}
1506	}
1507	"-xgrid" - "-ygrid" - "-zgrid" {
1508	set axis [string tolower [string range $what 1 1]]
1509	set bool $_settings($what)
1510	SendCmd "axis grid $axis $bool"
1511	}
1512	default {
1513	error "don't know how to fix $what"
1514	}
1515	}
1516	}
1517
1518	#
1519	# RequestLegend --
1520	#
1521	# Request a new legend from the server. The size of the legend
1522	# is determined from the height of the canvas.
1523	#
1524	# This should be called when
1525	# 1. A new current colormap is set.
1526	# 2. Window is resized.
1527	# 3. The limits of the data have changed. (Just need a redraw).
1528	# 4. Number of isolines have changed. (Just need a redraw).
1529	# 5. Legend becomes visible (Just need a redraw).
1530	#
1531	itcl::body Rappture::VtkImageViewer::RequestLegend {} {
1532	set _legendPending 0
1533	set font "Arial 8"
1534	set w 12
1535	set lineht [font metrics $font -linespace]
1536	# color ramp height = (canvas height) - (min and max value lines) - 2
1537	set h [expr {$_height - 2 * ($lineht + 2)}]
1538	set _legendHeight $h
1539
1540	set fname $_curFldName
1541	if { [string match "component*" $fname] } {
1542	set title ""
1543	} else {
1544	if { [info exists _fields($fname)] } {
1545	foreach { title units } $_fields($fname) break
1546	if { $units != "" } {
1547	set title [format "%s (%s)" $title $units]
1548	}
1549	} else {
1550	set title $fname
1551	}
1552	}
1553	# If there's a title too, substract one more line
1554	if { $title != "" } {
1555	incr h -$lineht
1556	}
1557	if { $h < 1 } {
1558	return
1559	}
1560	# Set the legend on the first image dataset.
1561	if { $_currentColormap != "" && $_currentColormap != "none" } {
1562	set cmap $_currentColormap
1563	if { ![info exists _colormaps($cmap)] } {
1564	BuildColormap $cmap
1565	set _colormaps($cmap) 1
1566	}
1567	#SendCmd "legend $cmap scalar $_curFldName {} $w $h 0"
1568	SendCmd "legend2 $cmap $w $h"
1569	}
1570	}
1571
1572	#
1573	# SetCurrentColormap --
1574	#
1575	itcl::body Rappture::VtkImageViewer::SetCurrentColormap { name } {
1576	# Keep track of the colormaps that we build.
1577	if { $name != "none" && ![info exists _colormaps($name)] } {
1578	BuildColormap $name
1579	set _colormaps($name) 1
1580	}
1581	set _currentColormap $name
1582	SendCmd "image colormap $_currentColormap"
1583	}
1584
1585
1586	#
1587	# BuildColormap --
1588	#
1589	# Build the designated colormap on the server.
1590	#
1591	itcl::body Rappture::VtkImageViewer::BuildColormap { name } {
1592	set cmap [ColorsToColormap $name]
1593	if { [llength $cmap] == 0 } {
1594	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
1595	}
1596	set wmap "0.0 1.0 1.0 1.0"
1597	SendCmd "colormap add $name { $cmap } { $wmap }"
1598	}
1599
1600	# ----------------------------------------------------------------------
1601	# CONFIGURATION OPTION: -mode
1602	# ----------------------------------------------------------------------
1603	itcl::configbody Rappture::VtkImageViewer::mode {
1604	switch -- $itk_option(-mode) {
1605	"volume" {
1606	set _settings(-view3d) 1
1607	}
1608	"vtkimage" {
1609	set _settings(-view3d) 0
1610	}
1611	default {
1612	error "unknown mode settings \"$itk_option(-mode)\""
1613	}
1614	}
1615	if { !$_reset } {
1616	AdjustSetting -view3d
1617	}
1618	}
1619
1620	# ----------------------------------------------------------------------
1621	# CONFIGURATION OPTION: -plotbackground
1622	# ----------------------------------------------------------------------
1623	itcl::configbody Rappture::VtkImageViewer::plotbackground {
1624	if { [isconnected] } {
1625	set rgb [Color2RGB $itk_option(-plotbackground)]
1626	if { !$_reset } {
1627	SendCmd "screen bgcolor $rgb"
1628	}
1629	$itk_component(view) configure -background $itk_option(-plotbackground)
1630	}
1631	}
1632
1633	# ----------------------------------------------------------------------
1634	# CONFIGURATION OPTION: -plotforeground
1635	# ----------------------------------------------------------------------
1636	itcl::configbody Rappture::VtkImageViewer::plotforeground {
1637	if { [isconnected] } {
1638	set rgb [Color2RGB $itk_option(-plotforeground)]
1639	if { !$_reset } {
1640	SendCmd "axis color all $rgb"
1641	SendCmd "outline color $rgb"
1642	}
1643	}
1644	}
1645
1646	itcl::body Rappture::VtkImageViewer::BuildImageTab {} {
1647
1648	set fg [option get $itk_component(hull) font Font]
1649	#set bfg [option get $itk_component(hull) boldFont Font]
1650
1651	set inner [$itk_component(main) insert end \
1652	-title "Image Settings" \
1653	-icon [Rappture::icon contour2]]
1654	$inner configure -borderwidth 4
1655
1656	checkbutton $inner.legend \
1657	-text "Legend" \
1658	-variable [itcl::scope _settings(-legendvisible)] \
1659	-command [itcl::code $this AdjustSetting -legendvisible] \
1660	-font "Arial 9"
1661
1662	checkbutton $inner.outline \
1663	-text "Outline" \
1664	-variable [itcl::scope _settings(-outline)] \
1665	-command [itcl::code $this AdjustSetting -outline] \
1666	-font "Arial 9"
1667
1668	checkbutton $inner.backing \
1669	-text "Backing" \
1670	-variable [itcl::scope _settings(-backingvisible)] \
1671	-command [itcl::code $this AdjustSetting -backingvisible] \
1672	-font "Arial 9"
1673
1674	checkbutton $inner.stretch \
1675	-text "Stretch to fit" \
1676	-variable [itcl::scope _settings(-stretchtofit)] \
1677	-command [itcl::code $this AdjustSetting -stretchtofit] \
1678	-font "Arial 9"
1679
1680	checkbutton $inner.colormapDiscrete \
1681	-text "Discrete Colormap" \
1682	-variable [itcl::scope _settings(-colormapdiscrete)] \
1683	-command [itcl::code $this AdjustSetting -colormapdiscrete] \
1684	-font "Arial 9"
1685
1686	itk_component add field_l {
1687	label $inner.field_l -text "Field" -font "Arial 9"
1688	} {
1689	ignore -font
1690	}
1691	itk_component add field {
1692	Rappture::Combobox $inner.field -width 10 -editable no
1693	}
1694	bind $inner.field <<Value>> \
1695	[itcl::code $this AdjustSetting -field]
1696
1697	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1698	itk_component add colormap {
1699	Rappture::Combobox $inner.colormap -width 10 -editable no
1700	}
1701	$inner.colormap choices insert end [GetColormapList -includeNone]
1702
1703	$itk_component(colormap) value "BCGYR"
1704	bind $inner.colormap <<Value>> \
1705	[itcl::code $this AdjustSetting -colormap]
1706
1707	label $inner.backingcolor_l -text "Backing Color" -font "Arial 9"
1708	itk_component add backingcolor {
1709	Rappture::Combobox $inner.backingcolor -width 10 -editable no
1710	}
1711	$inner.backingcolor choices insert end \
1712	"black" "black" \
1713	"blue" "blue" \
1714	"cyan" "cyan" \
1715	"green" "green" \
1716	"grey" "grey" \
1717	"magenta" "magenta" \
1718	"orange" "orange" \
1719	"red" "red" \
1720	"white" "white" \
1721	"none" "none"
1722
1723	$itk_component(backingcolor) value $_settings(-backingcolor)
1724	bind $inner.backingcolor <<Value>> \
1725	[itcl::code $this AdjustSetting -backingcolor]
1726
1727	label $inner.background_l -text "Background Color" -font "Arial 9"
1728	itk_component add background {
1729	Rappture::Combobox $inner.background -width 10 -editable no
1730	}
1731	$inner.background choices insert end \
1732	"black" "black" \
1733	"white" "white" \
1734	"grey" "grey"
1735
1736	$itk_component(background) value "white"
1737	bind $inner.background <<Value>> \
1738	[itcl::code $this AdjustSetting -background]
1739
1740	itk_component add opacity_l {
1741	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1742	} {
1743	ignore -font
1744	}
1745	itk_component add opacity {
1746	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1747	-variable [itcl::scope _settings(-opacity)] \
1748	-showvalue off \
1749	-command [itcl::code $this AdjustSetting -opacity]
1750	}
1751
1752	itk_component add window_l {
1753	label $inner.window_l -text "Window" -font "Arial 9"
1754	} {
1755	ignore -font
1756	}
1757	itk_component add window {
1758	::scale $inner.window -from 0 -to 255 -orient horizontal \
1759	-variable [itcl::scope _settings(-window)] \
1760	-showvalue off \
1761	-command [itcl::code $this AdjustSetting -window]
1762	}
1763	itk_component add level_l {
1764	label $inner.level_l -text "Level" -font "Arial 9"
1765	} {
1766	ignore -font
1767	}
1768	itk_component add level {
1769	::scale $inner.level -from 0 -to 255 -orient horizontal \
1770	-variable [itcl::scope _settings(-level)] \
1771	-showvalue off \
1772	-command [itcl::code $this AdjustSetting -level]
1773	}
1774
1775	frame $inner.separator1 -height 2 -relief sunken -bd 1
1776	frame $inner.separator2 -height 2 -relief sunken -bd 1
1777
1778	blt::table $inner \
1779	0,0 $inner.field_l -anchor w -pady 2 \
1780	0,1 $inner.field -anchor w -pady 2 -fill x \
1781	1,0 $inner.colormap_l -anchor w -pady 2 \
1782	1,1 $inner.colormap -anchor w -pady 2 -fill x \
1783	2,0 $inner.backingcolor_l -anchor w -pady 2 \
1784	2,1 $inner.backingcolor -anchor w -pady 2 -fill x \
1785	3,0 $inner.background_l -anchor w -pady 2 \
1786	3,1 $inner.background -anchor w -pady 2 -fill x \
1787	4,0 $inner.backing -anchor w -pady 2 -cspan 2 \
1788	5,0 $inner.stretch -anchor w -pady 2 -cspan 2 \
1789	7,0 $inner.legend -anchor w -pady 2 -cspan 2 \
1790	8,0 $inner.colormapDiscrete -anchor w -pady 2 -cspan 2 \
1791	11,0 $inner.separator1 -padx 2 -fill x -cspan 2 \
1792	12,0 $inner.outline -anchor w -pady 2 -cspan 2 \
1793	13,0 $inner.separator2 -padx 2 -fill x -cspan 2 \
1794	15,0 $inner.opacity_l -anchor w -pady 2 \
1795	15,1 $inner.opacity -fill x -pady 2 \
1796	16,0 $inner.window_l -anchor w -pady 2 \
1797	16,1 $inner.window -fill x -pady 2 \
1798	17,0 $inner.level_l -anchor w -pady 2 \
1799	17,1 $inner.level -fill x -pady 2
1800
1801	blt::table configure $inner r* c* -resize none
1802	blt::table configure $inner r19 c1 -resize expand
1803	}
1804
1805	itcl::body Rappture::VtkImageViewer::BuildAxisTab {} {
1806
1807	set fg [option get $itk_component(hull) font Font]
1808	#set bfg [option get $itk_component(hull) boldFont Font]
1809
1810	set inner [$itk_component(main) insert end \
1811	-title "Axis Settings" \
1812	-icon [Rappture::icon axis2]]
1813	$inner configure -borderwidth 4
1814
1815	checkbutton $inner.visible \
1816	-text "Axes" \
1817	-variable [itcl::scope _settings(-axisvisible)] \
1818	-command [itcl::code $this AdjustSetting -axisvisible] \
1819	-font "Arial 9"
1820	checkbutton $inner.labels \
1821	-text "Axis Labels" \
1822	-variable [itcl::scope _settings(-axislabels)] \
1823	-command [itcl::code $this AdjustSetting -axislabels] \
1824	-font "Arial 9"
1825	label $inner.grid_l -text "Grid" -font "Arial 9"
1826	checkbutton $inner.xgrid \
1827	-text "X" \
1828	-variable [itcl::scope _settings(-xgrid)] \
1829	-command [itcl::code $this AdjustSetting -xgrid] \
1830	-font "Arial 9"
1831	checkbutton $inner.ygrid \
1832	-text "Y" \
1833	-variable [itcl::scope _settings(-ygrid)] \
1834	-command [itcl::code $this AdjustSetting -ygrid] \
1835	-font "Arial 9"
1836	checkbutton $inner.zgrid \
1837	-text "Z" \
1838	-variable [itcl::scope _settings(-zgrid)] \
1839	-command [itcl::code $this AdjustSetting -zgrid] \
1840	-font "Arial 9"
1841	checkbutton $inner.minorticks \
1842	-text "Minor Ticks" \
1843	-variable [itcl::scope _settings(-axisminorticks)] \
1844	-command [itcl::code $this AdjustSetting -axisminorticks] \
1845	-font "Arial 9"
1846
1847	label $inner.mode_l -text "Mode" -font "Arial 9"
1848
1849	itk_component add axisflymode {
1850	Rappture::Combobox $inner.mode -width 10 -editable no
1851	}
1852	$inner.mode choices insert end \
1853	"static_triad" "static" \
1854	"closest_triad" "closest" \
1855	"furthest_triad" "farthest" \
1856	"outer_edges" "outer"
1857	$itk_component(axisflymode) value $_settings(-axisflymode)
1858	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting -axisflymode]
1859
1860	blt::table $inner \
1861	0,0 $inner.visible -anchor w -cspan 4 \
1862	1,0 $inner.labels -anchor w -cspan 4 \
1863	2,0 $inner.minorticks -anchor w -cspan 4 \
1864	4,0 $inner.grid_l -anchor w \
1865	4,1 $inner.xgrid -anchor w \
1866	4,2 $inner.ygrid -anchor w \
1867	4,3 $inner.zgrid -anchor w \
1868	5,0 $inner.mode_l -anchor w -padx { 2 0 } \
1869	5,1 $inner.mode -fill x -cspan 3
1870
1871	blt::table configure $inner r* c* -resize none
1872	blt::table configure $inner r7 c6 -resize expand
1873	blt::table configure $inner r3 -height 0.125i
1874	}
1875
1876	itcl::body Rappture::VtkImageViewer::BuildCameraTab {} {
1877	set inner [$itk_component(main) insert end \
1878	-title "Camera Settings" \
1879	-icon [Rappture::icon camera]]
1880	$inner configure -borderwidth 4
1881
1882	label $inner.view_l -text "view" -font "Arial 9"
1883	set f [frame $inner.view]
1884	foreach side { front back left right top bottom } {
1885	button $f.$side -image [Rappture::icon view$side] \
1886	-command [itcl::code $this SetOrientation $side]
1887	Rappture::Tooltip::for $f.$side "Change the view to $side"
1888	pack $f.$side -side left
1889	}
1890
1891	blt::table $inner \
1892	0,0 $inner.view_l -anchor e -pady 2 \
1893	0,1 $inner.view -anchor w -pady 2
1894	blt::table configure $inner r0 -resize none
1895
1896	set labels { qx qy qz qw xpan ypan zoom }
1897	set row 1
1898	foreach tag $labels {
1899	label $inner.${tag}label -text $tag -font "Arial 9"
1900	entry $inner.${tag} -font "Arial 9" -bg white \
1901	-textvariable [itcl::scope _view(-$tag)]
1902	bind $inner.${tag} <Return> \
1903	[itcl::code $this camera set -${tag}]
1904	bind $inner.${tag} <KP_Enter> \
1905	[itcl::code $this camera set -${tag}]
1906	blt::table $inner \
1907	$row,0 $inner.${tag}label -anchor e -pady 2 \
1908	$row,1 $inner.${tag} -anchor w -pady 2
1909	blt::table configure $inner r$row -resize none
1910	incr row
1911	}
1912	checkbutton $inner.ortho \
1913	-text "Orthographic Projection" \
1914	-variable [itcl::scope _view(-ortho)] \
1915	-command [itcl::code $this camera set -ortho] \
1916	-font "Arial 9"
1917	blt::table $inner \
1918	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1919	blt::table configure $inner r$row -resize none
1920	incr row
1921
1922	blt::table configure $inner c* -resize none
1923	blt::table configure $inner c2 -resize expand
1924	blt::table configure $inner r$row -resize expand
1925	}
1926
1927	#
1928	# camera --
1929	#
1930	itcl::body Rappture::VtkImageViewer::camera {option args} {
1931	switch -- $option {
1932	"show" {
1933	puts [array get _view]
1934	}
1935	"set" {
1936	set what [lindex $args 0]
1937	set x $_view($what)
1938	set code [catch { string is double $x } result]
1939	if { $code != 0 \|\| !$result } {
1940	return
1941	}
1942	switch -- $what {
1943	"-ortho" {
1944	if {$_view($what)} {
1945	SendCmd "camera mode ortho"
1946	} else {
1947	SendCmd "camera mode persp"
1948	}
1949	}
1950	"-xpan" - "-ypan" {
1951	PanCamera
1952	}
1953	"-qx" - "-qy" - "-qz" - "-qw" {
1954	set q [ViewToQuaternion]
1955	$_arcball quaternion $q
1956	EventuallyRotate $q
1957	}
1958	"-zoom" {
1959	SendCmd "camera zoom $_view($what)"
1960	}
1961	}
1962	}
1963	}
1964	}
1965
1966	itcl::body Rappture::VtkImageViewer::GetVtkData { args } {
1967	set bytes ""
1968	foreach dataobj [get] {
1969	foreach comp [$dataobj components] {
1970	set tag $dataobj-$comp
1971	set contents [$dataobj vtkdata $comp]
1972	append bytes "$contents\n"
1973	}
1974	}
1975	return [list .vtk $bytes]
1976	}
1977
1978	itcl::body Rappture::VtkImageViewer::GetImage { args } {
1979	if { [image width $_image(download)] > 0 &&
1980	[image height $_image(download)] > 0 } {
1981	set bytes [$_image(download) data -format "jpeg -quality 100"]
1982	set bytes [Rappture::encoding::decode -as b64 $bytes]
1983	return [list .jpg $bytes]
1984	}
1985	return ""
1986	}
1987
1988	itcl::body Rappture::VtkImageViewer::BuildDownloadPopup { popup command } {
1989	Rappture::Balloon $popup \
1990	-title "[Rappture::filexfer::label downloadWord] as..."
1991	set inner [$popup component inner]
1992	label $inner.summary -text "" -anchor w
1993	radiobutton $inner.vtk_button -text "VTK data file" \
1994	-variable [itcl::scope _downloadPopup(format)] \
1995	-font "Arial 9 " \
1996	-value vtk
1997	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
1998	radiobutton $inner.image_button -text "Image File" \
1999	-variable [itcl::scope _downloadPopup(format)] \
2000	-font "Arial 9 " \
2001	-value image
2002	Rappture::Tooltip::for $inner.image_button \
2003	"Save as digital image."
2004
2005	button $inner.ok -text "Save" \
2006	-highlightthickness 0 -pady 2 -padx 3 \
2007	-command $command \
2008	-compound left \
2009	-image [Rappture::icon download]
2010
2011	button $inner.cancel -text "Cancel" \
2012	-highlightthickness 0 -pady 2 -padx 3 \
2013	-command [list $popup deactivate] \
2014	-compound left \
2015	-image [Rappture::icon cancel]
2016
2017	blt::table $inner \
2018	0,0 $inner.summary -cspan 2 \
2019	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2020	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2021	4,1 $inner.cancel -width .9i -fill y \
2022	4,0 $inner.ok -padx 2 -width .9i -fill y
2023	blt::table configure $inner r3 -height 4
2024	blt::table configure $inner r4 -pady 4
2025	raise $inner.image_button
2026	$inner.vtk_button invoke
2027	return $inner
2028	}
2029
2030	#
2031	# SetObjectStyle --
2032	#
2033	# Set the style of the image/contour object. This gets calls
2034	# for each dataset once as it is loaded. It can overridden by
2035	# the user controls.
2036	#
2037	#
2038	itcl::body Rappture::VtkImageViewer::SetObjectStyle { dataobj comp } {
2039	# Parse style string.
2040	set tag $dataobj-$comp
2041	array set style {
2042	-color none
2043	-opacity 1.0
2044	}
2045	set stylelist [$dataobj style $comp]
2046	if { $stylelist != "" } {
2047	array set style $stylelist
2048	}
2049	# This is too complicated. We want to set the colormap, number of
2050	# isolines and opacity for the dataset. They can be the default values,
2051	# the style hints loaded with the dataset, or set by user controls. As
2052	# datasets get loaded, they first use the defaults that are overidden
2053	# by the style hints. If the user changes the global controls, then that
2054	# overrides everything else. I don't know what it means when global
2055	# controls are specified as style hints by each dataset. It complicates
2056	# the code to handle aberrant cases.
2057
2058	if { $_changed(-opacity) } {
2059	set style(-opacity) [expr $_settings(-opacity) * 0.01]
2060	}
2061	if { $_changed(-colormap) } {
2062	set style(-color) $_settings(-colormap)
2063	}
2064	if { $_currentColormap == "" } {
2065	$itk_component(colormap) value $style(-color)
2066	}
2067	if { [info exists style(-stretchtofit)] } {
2068	set _settings(-stretchtofit) $style(-stretchtofit)
2069	AdjustSetting -stretchToFit
2070	}
2071	SendCmd "outline add $tag"
2072	SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
2073	SendCmd "outline visible $_settings(-outline) $tag"
2074	SendCmd "image add $tag"
2075	SetCurrentColormap $style(-color)
2076	set color [$itk_component(backingcolor) value]
2077	SendCmd "image color [Color2RGB $color] $tag"
2078	SendCmd "image opacity $style(-opacity) $tag"
2079	set _settings(-opacity) [expr $style(-opacity) * 100.0]
2080	}
2081
2082	itcl::body Rappture::VtkImageViewer::IsValidObject { dataobj } {
2083	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2084	return 0
2085	}
2086	return 1
2087	}
2088
2089	# ----------------------------------------------------------------------
2090	# USAGE: ReceiveLegend <colormap> <title> <min> <max> <size>
2091	#
2092	# Invoked automatically whenever the "legend" command comes in from
2093	# the rendering server. Indicates that binary image data with the
2094	# specified <size> will follow.
2095	# ----------------------------------------------------------------------
2096	itcl::body Rappture::VtkImageViewer::ReceiveLegend { colormap title min max size } {
2097	#puts stderr "ReceiveLegend colormap=$colormap title=$title range=$min,$max size=$size"
2098	if { [isconnected] } {
2099	set bytes [ReceiveBytes $size]
2100	if { ![info exists _image(legend)] } {
2101	set _image(legend) [image create photo]
2102	}
2103	$_image(legend) configure -data $bytes
2104	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2105	if { [catch {DrawLegend} errs] != 0 } {
2106	global errorInfo
2107	puts stderr "errs=$errs errorInfo=$errorInfo"
2108	}
2109	}
2110	}
2111
2112	#
2113	# DrawLegend --
2114	#
2115	# Draws the legend in the own canvas on the right side of the plot area.
2116	#
2117	itcl::body Rappture::VtkImageViewer::DrawLegend {} {
2118	set fname $_curFldName
2119	set c $itk_component(view)
2120	set w [winfo width $c]
2121	set h [winfo height $c]
2122	set font "Arial 8"
2123	set lineht [font metrics $font -linespace]
2124
2125	if { [string match "component*" $fname] } {
2126	set title ""
2127	} else {
2128	if { [info exists _fields($fname)] } {
2129	foreach { title units } $_fields($fname) break
2130	if { $units != "" } {
2131	set title [format "%s (%s)" $title $units]
2132	}
2133	} else {
2134	set title $fname
2135	}
2136	}
2137	set x [expr $w - 2]
2138	if { !$_settings(-legendvisible) } {
2139	$c delete legend
2140	return
2141	}
2142	if { [$c find withtag "legend"] == "" } {
2143	set y 2
2144	# If there's a legend title, create a text item for the title.
2145	$c create text $x $y \
2146	-anchor ne \
2147	-fill $itk_option(-plotforeground) -tags "title legend" \
2148	-font $font
2149	if { $title != "" } {
2150	incr y $lineht
2151	}
2152	$c create text $x $y \
2153	-anchor ne \
2154	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2155	-font $font
2156	incr y $lineht
2157	$c create image $x $y \
2158	-anchor ne \
2159	-image $_image(legend) -tags "colormap legend"
2160	$c create rectangle $x $y 1 1 \
2161	-fill "" -outline "" -tags "sensor legend"
2162	$c create text $x [expr {$h-2}] \
2163	-anchor se \
2164	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2165	-font $font
2166	$c bind sensor <Enter> [itcl::code $this EnterLegend %x %y]
2167	$c bind sensor <Leave> [itcl::code $this LeaveLegend]
2168	$c bind sensor <Motion> [itcl::code $this MotionLegend %x %y]
2169	}
2170
2171	set x2 $x
2172	set iw [image width $_image(legend)]
2173	set ih [image height $_image(legend)]
2174	set x1 [expr $x2 - ($iw*12)/10]
2175
2176	$c bind title <ButtonPress> [itcl::code $this Combo post]
2177	$c bind title <Enter> [itcl::code $this Combo activate]
2178	$c bind title <Leave> [itcl::code $this Combo deactivate]
2179	# Reset the item coordinates according the current size of the plot.
2180	if { [info exists _limits($_curFldName)] } {
2181	foreach { vmin vmax } $_limits($_curFldName) break
2182	$c itemconfigure vmin -text [format %g $vmin]
2183	$c itemconfigure vmax -text [format %g $vmax]
2184	}
2185	set y 2
2186	# If there's a legend title, move the title to the correct position
2187	if { $title != "" } {
2188	$c itemconfigure title -text $title
2189	$c coords title $x $y
2190	incr y $lineht
2191	}
2192	$c coords vmax $x $y
2193	incr y $lineht
2194	$c coords colormap $x $y
2195	$c coords sensor [expr $x - $iw] $y $x [expr $y + $ih]
2196	$c raise sensor
2197	$c coords vmin $x [expr {$h - 2}]
2198	}
2199
2200	#
2201	# EnterLegend --
2202	#
2203	itcl::body Rappture::VtkImageViewer::EnterLegend { x y } {
2204	SetLegendTip $x $y
2205	}
2206
2207	#
2208	# MotionLegend --
2209	#
2210	itcl::body Rappture::VtkImageViewer::MotionLegend { x y } {
2211	Rappture::Tooltip::tooltip cancel
2212	set c $itk_component(view)
2213	set cw [winfo width $c]
2214	set ch [winfo height $c]
2215	if { $x >= 0 && $x < $cw && $y >= 0 && $y < $ch } {
2216	SetLegendTip $x $y
2217	}
2218	}
2219
2220	#
2221	# LeaveLegend --
2222	#
2223	itcl::body Rappture::VtkImageViewer::LeaveLegend { } {
2224	Rappture::Tooltip::tooltip cancel
2225	.rappturetooltip configure -icon ""
2226	}
2227
2228	#
2229	# SetLegendTip --
2230	#
2231	itcl::body Rappture::VtkImageViewer::SetLegendTip { x y } {
2232	set fname $_curFldName
2233	set c $itk_component(view)
2234	set w [winfo width $c]
2235	set h [winfo height $c]
2236	set font "Arial 8"
2237	set lineht [font metrics $font -linespace]
2238
2239	set ih [image height $_image(legend)]
2240	# Subtract off the offset of the color ramp from the top of the canvas
2241	set iy [expr $y - ($lineht + 2)]
2242
2243	if { [string match "component*" $fname] } {
2244	set title ""
2245	} else {
2246	if { [info exists _fields($fname)] } {
2247	foreach { title units } $_fields($fname) break
2248	if { $units != "" } {
2249	set title [format "%s (%s)" $title $units]
2250	}
2251	} else {
2252	set title $fname
2253	}
2254	}
2255	# If there's a legend title, increase the offset by the line height.
2256	if { $title != "" } {
2257	incr iy -$lineht
2258	}
2259
2260	# Make a swatch of the selected color
2261	if { [catch { $_image(legend) get 10 $iy } pixel] != 0 } {
2262	return
2263	}
2264
2265	if { ![info exists _image(swatch)] } {
2266	set _image(swatch) [image create photo -width 24 -height 24]
2267	}
2268	set color [eval format "\#%02x%02x%02x" $pixel]
2269	$_image(swatch) put black -to 0 0 23 23
2270	$_image(swatch) put $color -to 1 1 22 22
2271
2272	# Compute the value of the point
2273	if { [info exists _limits($fname)] } {
2274	foreach { vmin vmax } $_limits($fname) break
2275	set t [expr 1.0 - (double($iy) / double($ih-1))]
2276	set value [expr $t * ($vmax - $vmin) + $vmin]
2277	} else {
2278	set value 0.0
2279	}
2280	set tipx [expr $x + 15]
2281	set tipy [expr $y - 5]
2282	.rappturetooltip configure -icon $_image(swatch)
2283	if { [info exists _isolines($y)] } {
2284	Rappture::Tooltip::text $c [format "$title %g (isoline)" $_isolines($y)]
2285	} else {
2286	Rappture::Tooltip::text $c [format "$title %g" $value]
2287	}
2288	Rappture::Tooltip::tooltip show $c +$tipx,+$tipy
2289	}
2290
2291	# ----------------------------------------------------------------------
2292	# USAGE: _dropdown post
2293	# USAGE: _dropdown unpost
2294	# USAGE: _dropdown select
2295	#
2296	# Used internally to handle the dropdown list for this combobox. The
2297	# post/unpost options are invoked when the list is posted or unposted
2298	# to manage the relief of the controlling button. The select option
2299	# is invoked whenever there is a selection from the list, to assign
2300	# the value back to the gauge.
2301	# ----------------------------------------------------------------------
2302	itcl::body Rappture::VtkImageViewer::Combo {option} {
2303	set c $itk_component(view)
2304	switch -- $option {
2305	post {
2306	foreach { x1 y1 x2 y2 } [$c bbox title] break
2307	set x1 [expr [winfo width $itk_component(view)] - [winfo reqwidth $itk_component(fieldmenu)]]
2308	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2309	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2310	tk_popup $itk_component(fieldmenu) $x $y
2311	}
2312	activate {
2313	$c itemconfigure title -fill red
2314	}
2315	deactivate {
2316	$c itemconfigure title -fill $itk_option(-plotforeground)
2317	}
2318	invoke {
2319	$itk_component(field) value $_curFldLabel
2320	AdjustSetting -field
2321	}
2322	default {
2323	error "bad option \"$option\": should be post, unpost, select"
2324	}
2325	}
2326	}
2327
2328	itcl::body Rappture::VtkImageViewer::SetOrientation { side } {
2329	array set positions {
2330	front "0.707107 0.707107 0 0"
2331	back "0 0 0.707107 0.707107"
2332	left "0.5 0.5 -0.5 -0.5"
2333	right "0.5 0.5 0.5 0.5"
2334	top "1 0 0 0"
2335	bottom "0 1 0 0"
2336	}
2337	foreach name { -qw -qx -qy -qz } value $positions($side) {
2338	set _view($name) $value
2339	}
2340	set q [ViewToQuaternion]
2341	$_arcball quaternion $q
2342	SendCmd "camera orient $q"
2343	SendCmd "camera reset"
2344	set _view(-xpan) 0
2345	set _view(-ypan) 0
2346	set _view(-zoom) 1.0
2347	}

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