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

Last change on this file since 5033 was 4769, checked in by ldelgass, 10 years ago
sync up heightmap and image viewers
File size: 77.3 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; # Indicates if camera needs to be reset
137	# to starting position.
138	private variable _beforeConnect 1; # Indicates if camera needs to be reset
139	# to starting position.
140
141	private variable _first "" ; # This is the topmost dataset.
142	private variable _start 0
143	private variable _isolines
144	private variable _contourList ""
145
146	common _downloadPopup; # download options from popup
147	private common _hardcopy
148	private variable _width 0
149	private variable _height 0
150	private variable _legendWidth 0
151	private variable _legendHeight 0
152	private variable _resizePending 0
153	private variable _rotatePending 0
154	private variable _legendPending 0
155	private variable _fieldNames {}
156	private variable _fields
157	private variable _curFldName ""
158	private variable _curFldLabel ""
159	private variable _colorMode "scalar";# Mode of colormap (vmag or scalar)
160	}
161
162	itk::usual VtkImageViewer {
163	keep -background -foreground -cursor -font
164	keep -plotbackground -plotforeground -mode
165	}
166
167	# ----------------------------------------------------------------------
168	# CONSTRUCTOR
169	# ----------------------------------------------------------------------
170	itcl::body Rappture::VtkImageViewer::constructor {hostlist args} {
171	set _serverType "vtkvis"
172
173	EnableWaitDialog 900
174	# Rebuild event
175	$_dispatcher register !rebuild
176	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
177
178	# Resize event
179	$_dispatcher register !resize
180	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
181
182	# Rotate event
183	$_dispatcher register !rotate
184	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
185
186	# Legend event
187	$_dispatcher register !legend
188	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
189
190	#
191	# Populate parser with commands handle incoming requests
192	#
193	$_parser alias image [itcl::code $this ReceiveImage]
194	$_parser alias dataset [itcl::code $this ReceiveDataset]
195	$_parser alias legend [itcl::code $this ReceiveLegend]
196
197	# Create image for legend colorbar.
198	set _image(legend) [image create photo]
199
200	# Initialize the view to some default parameters.
201	array set _view {
202	-ortho 0
203	-qw 0.36
204	-qx 0.25
205	-qy 0.50
206	-qz 0.70
207	-xpan 0
208	-ypan 0
209	-zoom 1.0
210	}
211	set _arcball [blt::arcball create 100 100]
212	$_arcball quaternion [ViewToQuaternion]
213
214	array set _settings {
215	-axisflymode "static"
216	-axislabels 1
217	-axisminorticks 1
218	-axisvisible 1
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	-xgrid 0
233	-ygrid 0
234	-zgrid 0
235	}
236	array set _changed {
237	-colormap 0
238	-opacity 0
239	}
240	itk_component add view {
241	canvas $itk_component(plotarea).view \
242	-highlightthickness 0 -borderwidth 0
243	} {
244	usual
245	ignore -highlightthickness -borderwidth -background
246	}
247
248	itk_component add fieldmenu {
249	menu $itk_component(plotarea).menu \
250	-relief flat \
251	-tearoff no
252	} {
253	usual
254	ignore -background -foreground -relief -tearoff
255	}
256	set c $itk_component(view)
257	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
258	bind $c <4> [itcl::code $this Zoom in 0.25]
259	bind $c <5> [itcl::code $this Zoom out 0.25]
260	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
261	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
262	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
263	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
264	bind $c <Enter> "focus %W"
265	bind $c <Control-F1> [itcl::code $this ToggleConsole]
266
267	# Fix the scrollregion in case we go off screen
268	$c configure -scrollregion [$c bbox all]
269
270	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
271	set _map(cwidth) -1
272	set _map(cheight) -1
273	set _map(zoom) 1.0
274	set _map(original) ""
275
276	set f [$itk_component(main) component controls]
277	itk_component add reset {
278	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
279	-highlightthickness 0 \
280	-image [Rappture::icon reset-view] \
281	-command [itcl::code $this Zoom reset]
282	} {
283	usual
284	ignore -highlightthickness
285	}
286	pack $itk_component(reset) -side top -padx 2 -pady { 2 0 }
287	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
288
289	itk_component add zoomin {
290	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
291	-highlightthickness 0 \
292	-image [Rappture::icon zoom-in] \
293	-command [itcl::code $this Zoom in]
294	} {
295	usual
296	ignore -highlightthickness
297	}
298	pack $itk_component(zoomin) -side top -padx 2 -pady { 2 0 }
299	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
300
301	itk_component add zoomout {
302	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
303	-highlightthickness 0 \
304	-image [Rappture::icon zoom-out] \
305	-command [itcl::code $this Zoom out]
306	} {
307	usual
308	ignore -highlightthickness
309	}
310	pack $itk_component(zoomout) -side top -padx 2 -pady { 2 0 }
311	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
312
313	itk_component add mode {
314	Rappture::PushButton $f.mode \
315	-onimage [Rappture::icon surface] \
316	-offimage [Rappture::icon surface] \
317	-variable [itcl::scope _settings(-view3d)] \
318	-command [itcl::code $this AdjustSetting -view3d] \
319	}
320	Rappture::Tooltip::for $itk_component(mode) \
321	"Toggle the surface/contour on/off"
322	pack $itk_component(mode) -padx 2 -pady { 2 0 }
323
324	itk_component add stretchtofit {
325	Rappture::PushButton $f.stretchtofit \
326	-onimage [Rappture::icon stretchtofit] \
327	-offimage [Rappture::icon stretchtofit] \
328	-variable [itcl::scope _settings(-stretchtofit)] \
329	-command [itcl::code $this AdjustSetting -stretchtofit] \
330	}
331	Rappture::Tooltip::for $itk_component(stretchtofit) \
332	"Stretch plot to fit window on/off"
333	pack $itk_component(stretchtofit) -padx 2 -pady 2
334
335	if { [catch {
336	BuildImageTab
337	BuildAxisTab
338	BuildCameraTab
339	} errs] != 0 } {
340	global errorInfo
341	puts stderr "errs=$errs errorInfo=$errorInfo"
342	}
343
344	# Hack around the Tk panewindow. The problem is that the requested
345	# size of the 3d view isn't set until an image is retrieved from
346	# the server. So the panewindow uses the tiny size.
347	set w 10000
348	pack forget $itk_component(view)
349	blt::table $itk_component(plotarea) \
350	0,0 $itk_component(view) -fill both -reqwidth $w
351	blt::table configure $itk_component(plotarea) c1 -resize none
352
353	# Bindings for panning via mouse
354	bind $itk_component(view) <ButtonPress-2> \
355	[itcl::code $this Pan click %x %y]
356	bind $itk_component(view) <B2-Motion> \
357	[itcl::code $this Pan drag %x %y]
358	bind $itk_component(view) <ButtonRelease-2> \
359	[itcl::code $this Pan release %x %y]
360
361	#bind $itk_component(view) <ButtonRelease-3> \
362	# [itcl::code $this Pick %x %y]
363
364	# Bindings for panning via keyboard
365	bind $itk_component(view) <KeyPress-Left> \
366	[itcl::code $this Pan set -10 0]
367	bind $itk_component(view) <KeyPress-Right> \
368	[itcl::code $this Pan set 10 0]
369	bind $itk_component(view) <KeyPress-Up> \
370	[itcl::code $this Pan set 0 -10]
371	bind $itk_component(view) <KeyPress-Down> \
372	[itcl::code $this Pan set 0 10]
373	bind $itk_component(view) <Shift-KeyPress-Left> \
374	[itcl::code $this Pan set -2 0]
375	bind $itk_component(view) <Shift-KeyPress-Right> \
376	[itcl::code $this Pan set 2 0]
377	bind $itk_component(view) <Shift-KeyPress-Up> \
378	[itcl::code $this Pan set 0 -2]
379	bind $itk_component(view) <Shift-KeyPress-Down> \
380	[itcl::code $this Pan set 0 2]
381
382	# Bindings for zoom via keyboard
383	bind $itk_component(view) <KeyPress-Prior> \
384	[itcl::code $this Zoom out]
385	bind $itk_component(view) <KeyPress-Next> \
386	[itcl::code $this Zoom in]
387
388	bind $itk_component(view) <Enter> "focus $itk_component(view)"
389
390	if {[string equal "x11" [tk windowingsystem]]} {
391	# Bindings for zoom via mouse
392	bind $itk_component(view) <4> [itcl::code $this Zoom out]
393	bind $itk_component(view) <5> [itcl::code $this Zoom in]
394	}
395
396	set _image(download) [image create photo]
397	eval itk_initialize $args
398	Connect
399	set _beforeConnect 0
400	}
401
402	# ----------------------------------------------------------------------
403	# DESTRUCTOR
404	# ----------------------------------------------------------------------
405	itcl::body Rappture::VtkImageViewer::destructor {} {
406	Disconnect
407	image delete $_image(plot)
408	image delete $_image(download)
409	catch { blt::arcball destroy $_arcball }
410	}
411
412	itcl::body Rappture::VtkImageViewer::DoResize {} {
413	if { $_width < 2 } {
414	set _width 500
415	}
416	if { $_height < 2 } {
417	set _height 500
418	}
419	set _start [clock clicks -milliseconds]
420	SendCmd "screen size [expr $_width - 20] $_height"
421
422	set font "Arial 8"
423	set lh [font metrics $font -linespace]
424	set h [expr {$_height - 2 * ($lh + 2)}]
425	if { $h != $_legendHeight } {
426	EventuallyRequestLegend
427	} else {
428	DrawLegend
429	}
430	set _resizePending 0
431	}
432
433	itcl::body Rappture::VtkImageViewer::DoRotate {} {
434	SendCmd "camera orient [ViewToQuaternion]"
435	set _rotatePending 0
436	}
437
438	itcl::body Rappture::VtkImageViewer::EventuallyRequestLegend {} {
439	if { !$_legendPending } {
440	set _legendPending 1
441	$_dispatcher event -idle !legend
442	}
443	}
444
445	itcl::body Rappture::VtkImageViewer::EventuallyResize { w h } {
446	set _width $w
447	set _height $h
448	$_arcball resize $w $h
449	if { !$_resizePending } {
450	set _resizePending 1
451	$_dispatcher event -after 250 !resize
452	}
453	}
454
455	set rotate_delay 100
456
457	itcl::body Rappture::VtkImageViewer::EventuallyRotate { q } {
458	QuaternionToView $q
459	if { !$_rotatePending } {
460	set _rotatePending 1
461	global rotate_delay
462	$_dispatcher event -after $rotate_delay !rotate
463	}
464	}
465
466	# ----------------------------------------------------------------------
467	# USAGE: add <dataobj> ?<settings>?
468	#
469	# Clients use this to add a data object to the plot. The optional
470	# <settings> are used to configure the plot. Allowed settings are
471	# -color, -brightness, -width, -linestyle, and -raise.
472	# ----------------------------------------------------------------------
473	itcl::body Rappture::VtkImageViewer::add {dataobj {settings ""}} {
474	if { ![$dataobj isvalid] } {
475	return; # Object doesn't contain valid data.
476	}
477	array set params {
478	-color auto
479	-width 1
480	-linestyle solid
481	-brightness 0
482	-raise 0
483	-description ""
484	-param ""
485	-type ""
486	}
487	array set params $settings
488	set params(-description) ""
489	set params(-param) ""
490	array set params $settings
491
492	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
493	# can't handle -autocolors yet
494	set params(-color) white
495	}
496	set pos [lsearch -exact $_dlist $dataobj]
497	if {$pos < 0} {
498	lappend _dlist $dataobj
499	}
500	set _obj2ovride($dataobj-color) $params(-color)
501	set _obj2ovride($dataobj-width) $params(-width)
502	set _obj2ovride($dataobj-raise) $params(-raise)
503	$_dispatcher event -idle !rebuild
504	}
505
506
507	# ----------------------------------------------------------------------
508	# USAGE: delete ?<dataobj1> <dataobj2> ...?
509	#
510	# Clients use this to delete a dataobj from the plot. If no dataobjs
511	# are specified, then all dataobjs are deleted. No data objects are
512	# deleted. They are only removed from the display list.
513	#
514	# ----------------------------------------------------------------------
515	itcl::body Rappture::VtkImageViewer::delete {args} {
516	if { [llength $args] == 0} {
517	set args $_dlist
518	}
519	# Delete all specified dataobjs
520	set changed 0
521	foreach dataobj $args {
522	set pos [lsearch -exact $_dlist $dataobj]
523	if { $pos < 0 } {
524	continue; # Don't know anything about it.
525	}
526	# Remove it from the dataobj list.
527	set _dlist [lreplace $_dlist $pos $pos]
528	array unset _obj2ovride $dataobj-*
529	array unset _settings $dataobj-*
530	set changed 1
531	}
532	# If anything changed, then rebuild the plot
533	if { $changed } {
534	$_dispatcher event -idle !rebuild
535	}
536	}
537
538	# ----------------------------------------------------------------------
539	# USAGE: get ?-objects?
540	# USAGE: get ?-visible?
541	# USAGE: get ?-image view?
542	#
543	# Clients use this to query the list of objects being plotted, in
544	# order from bottom to top of this result. The optional "-image"
545	# flag can also request the internal images being shown.
546	# ----------------------------------------------------------------------
547	itcl::body Rappture::VtkImageViewer::get {args} {
548	if {[llength $args] == 0} {
549	set args "-objects"
550	}
551	set op [lindex $args 0]
552	switch -- $op {
553	"-objects" {
554	# put the dataobj list in order according to -raise options
555	set dlist {}
556	foreach dataobj $_dlist {
557	if { ![IsValidObject $dataobj] } {
558	continue
559	}
560	if {[info exists _obj2ovride($dataobj-raise)] &&
561	$_obj2ovride($dataobj-raise)} {
562	set dlist [linsert $dlist 0 $dataobj]
563	} else {
564	lappend dlist $dataobj
565	}
566	}
567	return $dlist
568	}
569	"-visible" {
570	set dlist {}
571	foreach dataobj $_dlist {
572	if { ![IsValidObject $dataobj] } {
573	continue
574	}
575	if { ![info exists _obj2ovride($dataobj-raise)] } {
576	# No setting indicates that the object isn't visible.
577	continue
578	}
579	# Otherwise use the -raise parameter to put the object to
580	# the front of the list.
581	if { $_obj2ovride($dataobj-raise) } {
582	set dlist [linsert $dlist 0 $dataobj]
583	} else {
584	lappend dlist $dataobj
585	}
586	}
587	return $dlist
588	}
589	-image {
590	if {[llength $args] != 2} {
591	error "wrong # args: should be \"get -image view\""
592	}
593	switch -- [lindex $args end] {
594	view {
595	return $_image(plot)
596	}
597	default {
598	error "bad image name \"[lindex $args end]\": should be view"
599	}
600	}
601	}
602	default {
603	error "bad option \"$op\": should be -objects or -image"
604	}
605	}
606	}
607
608	#
609	# scale --
610	#
611	# This gets called either incrementally as new simulations are
612	# added or all at once as a sequence of images.
613	# This accounts for all objects--even those not showing on the
614	# screen. Because of this, the limits are appropriate for all
615	# objects as the user scans through data in the ResultSet viewer.
616	#
617	itcl::body Rappture::VtkImageViewer::scale {args} {
618	foreach dataobj $args {
619	if { ![$dataobj isvalid] } {
620	continue; # Object doesn't contain valid data.
621	}
622	foreach axis { x y } {
623	set lim [$dataobj limits $axis]
624	if { ![info exists _limits($axis)] } {
625	set _limits($axis) $lim
626	continue
627	}
628	foreach {min max} $lim break
629	foreach {amin amax} $_limits($axis) break
630	if { $amin > $min } {
631	set amin $min
632	}
633	if { $amax < $max } {
634	set amax $max
635	}
636	set _limits($axis) [list $amin $amax]
637	set units [$dataobj hints ${axis}units]
638	set found($units) 1
639	}
640	foreach { fname lim } [$dataobj fieldlimits] {
641	if { ![info exists _limits($fname)] } {
642	set _limits($fname) $lim
643	continue
644	}
645	foreach {min max} $lim break
646	foreach {fmin fmax} $_limits($fname) break
647	if { $fmin > $min } {
648	set fmin $min
649	}
650	if { $fmax < $max } {
651	set fmax $max
652	}
653	set _limits($fname) [list $fmin $fmax]
654	}
655	}
656	if { [array size found] > 1 } {
657	set _settings(-stretchtofit) 1
658	} else {
659	# Check if the range of the x and y axes requires that we stretch
660	# the contour to fit the plotting area. This can happen when the
661	# x and y scales differ greatly (> 100x)
662	foreach {xmin xmax} $_limits(x) break
663	foreach {ymin ymax} $_limits(y) break
664	if { (($xmax - $xmin) > (($ymax -$ymin) * $_maxScale)) \|\|
665	((($xmax - $xmin) * $_maxScale) < ($ymax -$ymin)) } {
666	set _settings(-stretchtofit) 1
667	}
668	}
669	}
670
671	# ----------------------------------------------------------------------
672	# USAGE: download coming
673	# USAGE: download controls <downloadCommand>
674	# USAGE: download now
675	#
676	# Clients use this method to create a downloadable representation
677	# of the plot. Returns a list of the form {ext string}, where
678	# "ext" is the file extension (indicating the type of data) and
679	# "string" is the data itself.
680	# ----------------------------------------------------------------------
681	itcl::body Rappture::VtkImageViewer::download {option args} {
682	switch $option {
683	coming {
684	if {[catch {
685	blt::winop snap $itk_component(plotarea) $_image(download)
686	}]} {
687	$_image(download) configure -width 1 -height 1
688	$_image(download) put #000000
689	}
690	}
691	controls {
692	set popup .vtkviewerdownload
693	if { ![winfo exists .vtkviewerdownload] } {
694	set inner [BuildDownloadPopup $popup [lindex $args 0]]
695	} else {
696	set inner [$popup component inner]
697	}
698	set _downloadPopup(image_controls) $inner.image_frame
699	set num [llength [get]]
700	set num [expr {($num == 1) ? "1 result" : "$num results"}]
701	set word [Rappture::filexfer::label downloadWord]
702	$inner.summary configure -text "$word $num in the following format:"
703	update idletasks ;# Fix initial sizes
704	return $popup
705	}
706	now {
707	set popup .vtkviewerdownload
708	if {[winfo exists .vtkviewerdownload]} {
709	$popup deactivate
710	}
711	switch -- $_downloadPopup(format) {
712	"image" {
713	return [$this GetImage [lindex $args 0]]
714	}
715	"vtk" {
716	return [$this GetVtkData [lindex $args 0]]
717	}
718	}
719	return ""
720	}
721	default {
722	error "bad option \"$option\": should be coming, controls, now"
723	}
724	}
725	}
726
727	# ----------------------------------------------------------------------
728	# USAGE: Connect ?<host:port>,<host:port>...?
729	#
730	# Clients use this method to establish a connection to a new
731	# server, or to reestablish a connection to the previous server.
732	# Any existing connection is automatically closed.
733	# ----------------------------------------------------------------------
734	itcl::body Rappture::VtkImageViewer::Connect {} {
735	global readyForNextFrame
736	set readyForNextFrame 1
737	set _reset 1
738	set _hosts [GetServerList "vtkvis"]
739	if { "" == $_hosts } {
740	return 0
741	}
742	set result [VisViewer::Connect $_hosts]
743	if { $result } {
744	if { $_reportClientInfo } {
745	# Tell the server the viewer, hub, user and session.
746	# Do this immediately on connect before buffering any commands
747	global env
748
749	set info {}
750	set user "???"
751	if { [info exists env(USER)] } {
752	set user $env(USER)
753	}
754	set session "???"
755	if { [info exists env(SESSION)] } {
756	set session $env(SESSION)
757	}
758	lappend info "version" "$Rappture::version"
759	lappend info "build" "$Rappture::build"
760	lappend info "svnurl" "$Rappture::svnurl"
761	lappend info "installdir" "$Rappture::installdir"
762	lappend info "hub" [exec hostname]
763	lappend info "client" "vtkimageviewer"
764	lappend info "user" $user
765	lappend info "session" $session
766	SendCmd "clientinfo [list $info]"
767	}
768	set w [winfo width $itk_component(view)]
769	set h [winfo height $itk_component(view)]
770	EventuallyResize $w $h
771	}
772	return $result
773	}
774
775	#
776	# isconnected --
777	#
778	# Indicates if we are currently connected to the visualization server.
779	#
780	itcl::body Rappture::VtkImageViewer::isconnected {} {
781	return [VisViewer::IsConnected]
782	}
783
784	#
785	# disconnect --
786	#
787	itcl::body Rappture::VtkImageViewer::disconnect {} {
788	Disconnect
789	set _reset 1
790	}
791
792	#
793	# Disconnect --
794	#
795	# Clients use this method to disconnect from the current rendering
796	# server.
797	#
798	itcl::body Rappture::VtkImageViewer::Disconnect {} {
799	VisViewer::Disconnect
800
801	$_dispatcher cancel !rebuild
802	$_dispatcher cancel !resize
803	$_dispatcher cancel !rotate
804	$_dispatcher cancel !legend
805	# disconnected -- no more data sitting on server
806	array unset _datasets
807	array unset _data
808	array unset _colormaps
809	array unset _obj2datasets
810	global readyForNextFrame
811	set readyForNextFrame 1
812	}
813
814	# ----------------------------------------------------------------------
815	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
816	#
817	# Invoked automatically whenever the "image" command comes in from
818	# the rendering server. Indicates that binary image data with the
819	# specified <size> will follow.
820	# ----------------------------------------------------------------------
821	itcl::body Rappture::VtkImageViewer::ReceiveImage { args } {
822	global readyForNextFrame
823	set readyForNextFrame 1
824	array set info {
825	-token "???"
826	-bytes 0
827	-type image
828	}
829	array set info $args
830	set bytes [ReceiveBytes $info(-bytes)]
831	if { $info(-type) == "image" } {
832	if 0 {
833	set f [open "last.ppm" "w"]
834	fconfigure $f -encoding binary
835	puts -nonewline $f $bytes
836	close $f
837	}
838	$_image(plot) configure -data $bytes
839	set time [clock seconds]
840	set date [clock format $time]
841	#puts stderr "$date: received image [image width $_image(plot)]x[image height $_image(plot)] image>"
842	if { $_start > 0 } {
843	set finish [clock clicks -milliseconds]
844	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
845	set _start 0
846	}
847	} elseif { $info(type) == "print" } {
848	set tag $this-print-$info(-token)
849	set _hardcopy($tag) $bytes
850	}
851	}
852
853	#
854	# ReceiveDataset --
855	#
856	itcl::body Rappture::VtkImageViewer::ReceiveDataset { args } {
857	if { ![isconnected] } {
858	return
859	}
860	set option [lindex $args 0]
861	switch -- $option {
862	"scalar" {
863	set option [lindex $args 1]
864	switch -- $option {
865	"world" {
866	foreach { x y z value tag } [lrange $args 2 end] break
867	}
868	"pixel" {
869	foreach { x y value tag } [lrange $args 2 end] break
870	}
871	}
872	}
873	"vector" {
874	set option [lindex $args 1]
875	switch -- $option {
876	"world" {
877	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
878	}
879	"pixel" {
880	foreach { x y vx vy vz tag } [lrange $args 2 end] break
881	}
882	}
883	}
884	"names" {
885	foreach { name } [lindex $args 1] {
886	#puts stderr "Dataset: $name"
887	}
888	}
889	default {
890	error "unknown dataset option \"$option\" from server"
891	}
892	}
893	}
894
895	# ----------------------------------------------------------------------
896	# USAGE: Rebuild
897	#
898	# Called automatically whenever something changes that affects the
899	# data in the widget. Clears any existing data and rebuilds the
900	# widget to display new data.
901	# ----------------------------------------------------------------------
902	itcl::body Rappture::VtkImageViewer::Rebuild {} {
903	set w [winfo width $itk_component(view)]
904	set h [winfo height $itk_component(view)]
905	if { $w < 2 \|\| $h < 2 } {
906	$_dispatcher event -idle !rebuild
907	return
908	}
909
910	# Turn on buffering of commands to the server. We don't want to
911	# be preempted by a server disconnect/reconnect (which automatically
912	# generates a new call to Rebuild).
913	StartBufferingCommands
914
915	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
916	set _width $w
917	set _height $h
918	$_arcball resize $w $h
919	DoResize
920	if { $_settings(-stretchtofit) } {
921	AdjustSetting -stretchToFit
922	}
923	}
924	if { $_reset } {
925	#
926	# Reset the camera and other view parameters
927	#
928	InitSettings -view3d -background
929
930	SendCmd "axis lrot z 90"
931	$_arcball quaternion [ViewToQuaternion]
932	if {$_settings(-view3d) } {
933	if { $_view(-ortho)} {
934	SendCmd "camera mode ortho"
935	} else {
936	SendCmd "camera mode persp"
937	}
938	DoRotate
939	SendCmd "camera reset"
940	}
941	PanCamera
942	StopBufferingCommands
943	SendCmd "imgflush"
944	StartBufferingCommands
945	}
946
947	set _first ""
948	# Start off with no datasets are visible.
949	SendCmd "dataset visible 0"
950	foreach dataobj [get -objects] {
951	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
952	set _first $dataobj
953	}
954	set _obj2datasets($dataobj) ""
955	foreach comp [$dataobj components] {
956	set tag $dataobj-$comp
957	if { ![info exists _datasets($tag)] } {
958	set bytes [$dataobj vtkdata $comp]
959	if 0 {
960	set f [open /tmp/vtkimage.vtk "w"]
961	fconfigure $f -translation binary -encoding binary
962	puts -nonewline $f $bytes
963	close $f
964	}
965	set length [string length $bytes]
966	if { $_reportClientInfo } {
967	set info {}
968	lappend info "tool_id" [$dataobj hints toolid]
969	lappend info "tool_name" [$dataobj hints toolname]
970	lappend info "tool_title" [$dataobj hints tooltitle]
971	lappend info "tool_command" [$dataobj hints toolcommand]
972	lappend info "tool_revision" [$dataobj hints toolrevision]
973	lappend info "dataset_label" [$dataobj hints label]
974	lappend info "dataset_size" $length
975	lappend info "dataset_tag" $tag
976	SendCmd "clientinfo [list $info]"
977	}
978	SendCmd "dataset add $tag data follows $length"
979	append _outbuf $bytes
980	set _datasets($tag) 1
981	SetObjectStyle $dataobj $comp
982	}
983	lappend _obj2datasets($dataobj) $tag
984	if { [info exists _obj2ovride($dataobj-raise)] } {
985	# Setting dataset visible enables outline
986	# and image
987	SendCmd "dataset visible 1 $tag"
988	}
989	}
990	}
991	if { $_first != "" } {
992	$itk_component(field) choices delete 0 end
993	$itk_component(fieldmenu) delete 0 end
994	array unset _fields
995	set _curFldName ""
996	foreach cname [$_first components] {
997	foreach fname [$_first fieldnames $cname] {
998	if { [info exists _fields($fname)] } {
999	continue
1000	}
1001	foreach { label units components } \
1002	[$_first fieldinfo $fname] break
1003	$itk_component(field) choices insert end "$fname" "$label"
1004	$itk_component(fieldmenu) add radiobutton -label "$label" \
1005	-value $label -variable [itcl::scope _curFldLabel] \
1006	-selectcolor red \
1007	-activebackground $itk_option(-plotbackground) \
1008	-activeforeground $itk_option(-plotforeground) \
1009	-font "Arial 8" \
1010	-command [itcl::code $this Combo invoke]
1011	set _fields($fname) [list $label $units $components]
1012	if { $_curFldName == "" } {
1013	set _curFldName $fname
1014	set _curFldLabel $label
1015	}
1016	}
1017	}
1018	$itk_component(field) value $_curFldLabel
1019	}
1020	InitSettings -stretchtofit -outline
1021
1022	if { $_reset } {
1023	SendCmd "axis tickpos outside"
1024	#SendCmd "axis lformat all %g"
1025
1026	foreach axis { x y z } {
1027	set label [$_first hints ${axis}label]
1028	if { $label == "" } {
1029	set label [string toupper $axis]
1030	}
1031	# May be a space in the axis label.
1032	SendCmd [list axis name $axis $label]
1033
1034	if {$axis == "z" && [$_first hints ${axis}units] == ""} {
1035	if {$_curFldName != ""} {
1036	set units [lindex $_fields($_curFldName) 1]
1037	}
1038	} else {
1039	set units [$_first hints ${axis}units]
1040	}
1041	if { $units != "" } {
1042	# May be a space in the axis units.
1043	SendCmd [list axis units $axis $units]
1044	}
1045	}
1046	#
1047	# Reset the camera and other view parameters
1048	#
1049	$_arcball quaternion [ViewToQuaternion]
1050	if {$_settings(-view3d) } {
1051	if { $_view(-ortho)} {
1052	SendCmd "camera mode ortho"
1053	} else {
1054	SendCmd "camera mode persp"
1055	}
1056	DoRotate
1057	SendCmd "camera reset"
1058	}
1059	PanCamera
1060	InitSettings -xgrid -ygrid -zgrid \
1061	-axisvisible -axislabels -field -view3d
1062	if { [array size _fields] < 2 } {
1063	catch {blt::table forget $itk_component(field) $itk_component(field_l)}
1064	}
1065	RequestLegend
1066	set _reset 0
1067	}
1068	global readyForNextFrame
1069	set readyForNextFrame 0; # Don't advance to the next frame
1070
1071	# Actually write the commands to the server socket. If it fails, we don't
1072	# care. We're finished here.
1073	blt::busy hold $itk_component(hull)
1074	StopBufferingCommands
1075	blt::busy release $itk_component(hull)
1076	}
1077
1078	# ----------------------------------------------------------------------
1079	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1080	#
1081	# Returns a list of server IDs for the current datasets being displayed. This
1082	# is normally a single ID, but it might be a list of IDs if the current data
1083	# object has multiple components.
1084	# ----------------------------------------------------------------------
1085	itcl::body Rappture::VtkImageViewer::CurrentDatasets {args} {
1086	set flag [lindex $args 0]
1087	switch -- $flag {
1088	"-all" {
1089	if { [llength $args] > 1 } {
1090	error "CurrentDatasets: can't specify dataobj after \"-all\""
1091	}
1092	set dlist [get -objects]
1093	}
1094	"-visible" {
1095	if { [llength $args] > 1 } {
1096	set dlist {}
1097	set args [lrange $args 1 end]
1098	foreach dataobj $args {
1099	if { [info exists _obj2ovride($dataobj-raise)] } {
1100	lappend dlist $dataobj
1101	}
1102	}
1103	} else {
1104	set dlist [get -visible]
1105	}
1106	}
1107	default {
1108	set dlist $args
1109	}
1110	}
1111	set rlist ""
1112	foreach dataobj $dlist {
1113	foreach comp [$dataobj components] {
1114	set tag $dataobj-$comp
1115	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1116	lappend rlist $tag
1117	}
1118	}
1119	}
1120	return $rlist
1121	}
1122
1123	# ----------------------------------------------------------------------
1124	# USAGE: Zoom in
1125	# USAGE: Zoom out
1126	# USAGE: Zoom reset
1127	#
1128	# Called automatically when the user clicks on one of the zoom
1129	# controls for this widget. Changes the zoom for the current view.
1130	# ----------------------------------------------------------------------
1131	itcl::body Rappture::VtkImageViewer::Zoom {option} {
1132	switch -- $option {
1133	"in" {
1134	set _view(-zoom) [expr {$_view(-zoom)*1.25}]
1135	SendCmd "camera zoom $_view(-zoom)"
1136	}
1137	"out" {
1138	set _view(-zoom) [expr {$_view(-zoom)*0.8}]
1139	SendCmd "camera zoom $_view(-zoom)"
1140	}
1141	"reset" {
1142	array set _view {
1143	-qw 0.36
1144	-qx 0.25
1145	-qy 0.50
1146	-qz 0.70
1147	-xpan 0
1148	-ypan 0
1149	-zoom 1.0
1150	}
1151	if { $_first != "" } {
1152	set location [$_first hints camera]
1153	if { $location != "" } {
1154	array set _view $location
1155	}
1156	}
1157	$_arcball quaternion [ViewToQuaternion]
1158	if {$_settings(-view3d) } {
1159	DoRotate
1160	}
1161	SendCmd "camera reset"
1162	}
1163	}
1164	}
1165
1166	itcl::body Rappture::VtkImageViewer::PanCamera {} {
1167	set x $_view(-xpan)
1168	set y $_view(-ypan)
1169	SendCmd "camera pan $x $y"
1170	}
1171
1172
1173	# ----------------------------------------------------------------------
1174	# USAGE: Rotate click <x> <y>
1175	# USAGE: Rotate drag <x> <y>
1176	# USAGE: Rotate release <x> <y>
1177	#
1178	# Called automatically when the user clicks/drags/releases in the
1179	# plot area. Moves the plot according to the user's actions.
1180	# ----------------------------------------------------------------------
1181	itcl::body Rappture::VtkImageViewer::Rotate {option x y} {
1182	switch -- $option {
1183	"click" {
1184	$itk_component(view) configure -cursor fleur
1185	set _click(x) $x
1186	set _click(y) $y
1187	}
1188	"drag" {
1189	if {[array size _click] == 0} {
1190	Rotate click $x $y
1191	} else {
1192	set w [winfo width $itk_component(view)]
1193	set h [winfo height $itk_component(view)]
1194	if {$w <= 0 \|\| $h <= 0} {
1195	return
1196	}
1197
1198	if {[catch {
1199	# this fails sometimes for no apparent reason
1200	set dx [expr {double($x-$_click(x))/$w}]
1201	set dy [expr {double($y-$_click(y))/$h}]
1202	}]} {
1203	return
1204	}
1205	if { $dx == 0 && $dy == 0 } {
1206	return
1207	}
1208	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1209	EventuallyRotate $q
1210	set _click(x) $x
1211	set _click(y) $y
1212	}
1213	}
1214	"release" {
1215	Rotate drag $x $y
1216	$itk_component(view) configure -cursor ""
1217	catch {unset _click}
1218	}
1219	default {
1220	error "bad option \"$option\": should be click, drag, release"
1221	}
1222	}
1223	}
1224
1225	itcl::body Rappture::VtkImageViewer::Pick {x y} {
1226	foreach tag [CurrentDatasets -visible] {
1227	SendCmd "dataset getscalar pixel $x $y $tag"
1228	}
1229	}
1230
1231	# ----------------------------------------------------------------------
1232	# USAGE: $this Pan click x y
1233	# $this Pan drag x y
1234	# $this Pan release x y
1235	#
1236	# Called automatically when the user clicks on one of the zoom
1237	# controls for this widget. Changes the zoom for the current view.
1238	# ----------------------------------------------------------------------
1239	itcl::body Rappture::VtkImageViewer::Pan {option x y} {
1240	switch -- $option {
1241	"set" {
1242	set w [winfo width $itk_component(view)]
1243	set h [winfo height $itk_component(view)]
1244	set x [expr $x / double($w)]
1245	set y [expr $y / double($h)]
1246	set _view(-xpan) [expr $_view(-xpan) + $x]
1247	set _view(-ypan) [expr $_view(-ypan) + $y]
1248	PanCamera
1249	return
1250	}
1251	"click" {
1252	set _click(x) $x
1253	set _click(y) $y
1254	$itk_component(view) configure -cursor hand1
1255	}
1256	"drag" {
1257	if { ![info exists _click(x)] } {
1258	set _click(x) $x
1259	}
1260	if { ![info exists _click(y)] } {
1261	set _click(y) $y
1262	}
1263	set w [winfo width $itk_component(view)]
1264	set h [winfo height $itk_component(view)]
1265	set dx [expr ($_click(x) - $x)/double($w)]
1266	set dy [expr ($_click(y) - $y)/double($h)]
1267	set _click(x) $x
1268	set _click(y) $y
1269	set _view(-xpan) [expr $_view(-xpan) - $dx]
1270	set _view(-ypan) [expr $_view(-ypan) - $dy]
1271	PanCamera
1272	}
1273	"release" {
1274	Pan drag $x $y
1275	$itk_component(view) configure -cursor ""
1276	}
1277	default {
1278	error "unknown option \"$option\": should set, click, drag, or release"
1279	}
1280	}
1281	}
1282
1283	# ----------------------------------------------------------------------
1284	# USAGE: InitSettings <what> ?<value>?
1285	#
1286	# Used internally to update rendering settings whenever parameters
1287	# change in the popup settings panel. Sends the new settings off
1288	# to the back end.
1289	# ----------------------------------------------------------------------
1290	itcl::body Rappture::VtkImageViewer::InitSettings { args } {
1291	foreach spec $args {
1292	if { [info exists _settings($_first${spec})] } {
1293	# Reset global setting with dataobj specific setting
1294	set _settings($spec) $_settings($_first${spec})
1295	}
1296	AdjustSetting $spec
1297	}
1298	}
1299
1300	#
1301	# AdjustSetting --
1302	#
1303	# Changes/updates a specific setting in the widget. There are
1304	# usually user-setable option. Commands are sent to the render
1305	# server.
1306	#
1307	itcl::body Rappture::VtkImageViewer::AdjustSetting {what {value ""}} {
1308	if { $_beforeConnect } {
1309	return
1310	}
1311	switch -- $what {
1312	"-axisflymode" {
1313	set mode [$itk_component(axisflymode) value]
1314	set mode [$itk_component(axisflymode) translate $mode]
1315	set _settings($what) $mode
1316	SendCmd "axis flymode $mode"
1317	}
1318	"-axislabels" {
1319	set bool $_settings($what)
1320	SendCmd "axis labels all $bool"
1321	}
1322	"-axisminorticks" {
1323	set bool $_settings($what)
1324	SendCmd "axis minticks all $bool"
1325	}
1326	"-axisvisible" {
1327	set bool $_settings($what)
1328	SendCmd "axis visible all $bool"
1329	}
1330	"-background" {
1331	set bg [$itk_component(background) value]
1332	array set fgcolors {
1333	"black" "white"
1334	"white" "black"
1335	"grey" "black"
1336	}
1337	set fg $fgcolors($bg)
1338	configure -plotbackground $bg -plotforeground $fg
1339	$itk_component(view) delete "legend"
1340	SendCmd "screen bgcolor [Color2RGB $bg]"
1341	SendCmd "outline color [Color2RGB $fg]"
1342	SendCmd "axis color all [Color2RGB $fg]"
1343	DrawLegend
1344	}
1345	"-backingcolor" {
1346	set color [$itk_component(backingcolor) value]
1347	if { $color == "none" } {
1348	if { $_settings(-backingvisible) } {
1349	SendCmd "image backing 0"
1350	set _settings(-backingvisible) 0
1351	}
1352	} else {
1353	if { !$_settings(-backingvisible) } {
1354	SendCmd "image backing 1"
1355	set _settings(-backingvisible) 1
1356	}
1357	SendCmd "image color [Color2RGB $color]"
1358	}
1359	}
1360	"-backingvisible" {
1361	set bool $_settings($what)
1362	SendCmd "image backing $bool"
1363	}
1364	"-colormap" {
1365	set _changed($what) 1
1366	StartBufferingCommands
1367	set color [$itk_component(colormap) value]
1368	set _settings($what) $color
1369	SetCurrentColormap $color
1370	if {$_settings(-colormapdiscrete)} {
1371	SendCmd "colormap res $_settings(-numcolors) $color"
1372	}
1373	StopBufferingCommands
1374	EventuallyRequestLegend
1375	}
1376	"-colormapdiscrete" {
1377	set bool $_settings($what)
1378	StartBufferingCommands
1379	if {$bool} {
1380	SendCmd "colormap res $_settings(-numcolors)"
1381	} else {
1382	SendCmd "colormap res default"
1383	}
1384	StopBufferingCommands
1385	EventuallyRequestLegend
1386	}
1387	"-field" {
1388	set label [$itk_component(field) value]
1389	set fname [$itk_component(field) translate $label]
1390	set _settings($what) $fname
1391	if { [info exists _fields($fname)] } {
1392	foreach { label units components } $_fields($fname) break
1393	if { $components > 1 } {
1394	set _colorMode vmag
1395	} else {
1396	set _colorMode scalar
1397	}
1398	set _curFldName $fname
1399	set _curFldLabel $label
1400	} else {
1401	puts stderr "unknown field \"$fname\""
1402	return
1403	}
1404
1405	# Get the new limits because the field changed.
1406	SendCmd "dataset scalar $_curFldName"
1407	#SendCmd "image colormode scalar $_curFldName"
1408	SendCmd "camera reset"
1409	DrawLegend
1410	}
1411	"-view3d" {
1412	set bool $_settings($what)
1413	set c $itk_component(view)
1414	StartBufferingCommands
1415	# Fix image scale: 0 for contours, 1 for images.
1416	if { $bool } {
1417	set _settings(-opacity) $_settings(-saveopacity)
1418	} else {
1419	set _settings(-opacity) 100
1420	}
1421	AdjustSetting -opacity
1422	if { $bool } {
1423	$itk_component(opacity) configure -state normal
1424	$itk_component(opacity_l) configure -state normal
1425	if {$_view(-ortho)} {
1426	SendCmd "camera mode ortho"
1427	} else {
1428	SendCmd "camera mode persp"
1429	}
1430	SendCmd "camera aspect native"
1431	} else {
1432	$itk_component(opacity) configure -state disabled
1433	$itk_component(opacity_l) configure -state disabled
1434	SendCmd "camera mode image"
1435	if {$_settings(-stretchtofit)} {
1436	SendCmd "camera aspect window"
1437	}
1438	}
1439	if { $bool } {
1440	set q [ViewToQuaternion]
1441	$_arcball quaternion $q
1442	SendCmd "camera orient $q"
1443	} else {
1444	bind $c <ButtonPress-1> {}
1445	bind $c <B1-Motion> {}
1446	bind $c <ButtonRelease-1> {}
1447	}
1448	SendCmd "camera reset"
1449	# Fix the mouse bindings for rotation/panning and the
1450	# camera mode. Ideally we'd create a bindtag for these.
1451	if { $bool } {
1452	# Bindings for rotation via mouse
1453	bind $c <ButtonPress-1> \
1454	[itcl::code $this Rotate click %x %y]
1455	bind $c <B1-Motion> \
1456	[itcl::code $this Rotate drag %x %y]
1457	bind $c <ButtonRelease-1> \
1458	[itcl::code $this Rotate release %x %y]
1459	}
1460	StopBufferingCommands
1461	}
1462	"-window" {
1463	set val $_settings($what)
1464	SendCmd "image window $val"
1465	}
1466	"-level" {
1467	set val $_settings($what)
1468	SendCmd "image level $val"
1469	}
1470	"-legendvisible" {
1471	if { !$_settings($what) } {
1472	$itk_component(view) delete legend
1473	}
1474	DrawLegend
1475	}
1476	"-opacity" {
1477	set _changed($what) 1
1478	if { $_settings(-view3d) } {
1479	set _settings(-saveopacity) $_settings($what)
1480	set val [expr $_settings($what) * 0.01]
1481	SendCmd "image opacity $val"
1482	} else {
1483	SendCmd "image opacity 1.0"
1484	}
1485	}
1486	"-outline" {
1487	set bool $_settings($what)
1488	SendCmd "outline visible $bool"
1489	}
1490	"-stretchtofit" {
1491	set bool $_settings($what)
1492	if { $bool } {
1493	if { $_settings(-view3d) } {
1494	SendCmd "camera aspect native"
1495	} else {
1496	SendCmd "camera aspect window"
1497	}
1498	} else {
1499	SendCmd "camera aspect native"
1500	}
1501	}
1502	"-xgrid" - "-ygrid" - "-zgrid" {
1503	set axis [string tolower [string range $what 1 1]]
1504	set bool $_settings($what)
1505	SendCmd "axis grid $axis $bool"
1506	}
1507	default {
1508	error "don't know how to fix $what"
1509	}
1510	}
1511	}
1512
1513	#
1514	# RequestLegend --
1515	#
1516	# Request a new legend from the server. The size of the legend
1517	# is determined from the height of the canvas.
1518	#
1519	# This should be called when
1520	# 1. A new current colormap is set.
1521	# 2. Window is resized.
1522	# 3. The limits of the data have changed. (Just need a redraw).
1523	# 4. Number of isolines have changed. (Just need a redraw).
1524	# 5. Legend becomes visible (Just need a redraw).
1525	#
1526	itcl::body Rappture::VtkImageViewer::RequestLegend {} {
1527	set _legendPending 0
1528	set font "Arial 8"
1529	set w 12
1530	set lineht [font metrics $font -linespace]
1531	# color ramp height = (canvas height) - (min and max value lines) - 2
1532	set h [expr {$_height - 2 * ($lineht + 2)}]
1533	set _legendHeight $h
1534
1535	set fname $_curFldName
1536	if { [string match "component*" $fname] } {
1537	set title ""
1538	} else {
1539	if { [info exists _fields($fname)] } {
1540	foreach { title units } $_fields($fname) break
1541	if { $units != "" } {
1542	set title [format "%s (%s)" $title $units]
1543	}
1544	} else {
1545	set title $fname
1546	}
1547	}
1548	# If there's a title too, substract one more line
1549	if { $title != "" } {
1550	incr h -$lineht
1551	}
1552	if { $h < 1 } {
1553	return
1554	}
1555	# Set the legend on the first image dataset.
1556	if { $_currentColormap != "" && $_currentColormap != "none" } {
1557	#SendCmd "legend $_currentColormap scalar $_curFldName {} $w $h 0"
1558	SendCmd "legend2 $_currentColormap $w $h"
1559	}
1560	}
1561
1562	#
1563	# SetCurrentColormap --
1564	#
1565	itcl::body Rappture::VtkImageViewer::SetCurrentColormap { name } {
1566	# Keep track of the colormaps that we build.
1567	if { $name != "none" && ![info exists _colormaps($name)] } {
1568	BuildColormap $name
1569	set _colormaps($name) 1
1570	}
1571	set _currentColormap $name
1572	SendCmd "image colormap $_currentColormap"
1573	}
1574
1575
1576	#
1577	# BuildColormap --
1578	#
1579	# Build the designated colormap on the server.
1580	#
1581	itcl::body Rappture::VtkImageViewer::BuildColormap { name } {
1582	set cmap [ColorsToColormap $name]
1583	if { [llength $cmap] == 0 } {
1584	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
1585	}
1586	set wmap "0.0 1.0 1.0 1.0"
1587	SendCmd "colormap add $name { $cmap } { $wmap }"
1588	}
1589
1590	# ----------------------------------------------------------------------
1591	# CONFIGURATION OPTION: -mode
1592	# ----------------------------------------------------------------------
1593	itcl::configbody Rappture::VtkImageViewer::mode {
1594	switch -- $itk_option(-mode) {
1595	"volume" {
1596	set _settings(-view3d) 1
1597	}
1598	"vtkimage" {
1599	set _settings(-view3d) 0
1600	}
1601	default {
1602	error "unknown mode settings \"$itk_option(-mode)\""
1603	}
1604	}
1605	if { !$_reset } {
1606	AdjustSetting -view3d
1607	}
1608	}
1609
1610	# ----------------------------------------------------------------------
1611	# CONFIGURATION OPTION: -plotbackground
1612	# ----------------------------------------------------------------------
1613	itcl::configbody Rappture::VtkImageViewer::plotbackground {
1614	if { [isconnected] } {
1615	set rgb [Color2RGB $itk_option(-plotbackground)]
1616	if { !$_reset } {
1617	SendCmd "screen bgcolor $rgb"
1618	}
1619	$itk_component(view) configure -background $itk_option(-plotbackground)
1620	}
1621	}
1622
1623	# ----------------------------------------------------------------------
1624	# CONFIGURATION OPTION: -plotforeground
1625	# ----------------------------------------------------------------------
1626	itcl::configbody Rappture::VtkImageViewer::plotforeground {
1627	if { [isconnected] } {
1628	set rgb [Color2RGB $itk_option(-plotforeground)]
1629	if { !$_reset } {
1630	SendCmd "axis color all $rgb"
1631	SendCmd "outline color $rgb"
1632	}
1633	}
1634	}
1635
1636	itcl::body Rappture::VtkImageViewer::BuildImageTab {} {
1637
1638	set fg [option get $itk_component(hull) font Font]
1639	#set bfg [option get $itk_component(hull) boldFont Font]
1640
1641	set inner [$itk_component(main) insert end \
1642	-title "Image Settings" \
1643	-icon [Rappture::icon contour2]]
1644	$inner configure -borderwidth 4
1645
1646	checkbutton $inner.legend \
1647	-text "Legend" \
1648	-variable [itcl::scope _settings(-legendvisible)] \
1649	-command [itcl::code $this AdjustSetting -legendvisible] \
1650	-font "Arial 9"
1651
1652	checkbutton $inner.outline \
1653	-text "Outline" \
1654	-variable [itcl::scope _settings(-outline)] \
1655	-command [itcl::code $this AdjustSetting -outline] \
1656	-font "Arial 9"
1657
1658	checkbutton $inner.backing \
1659	-text "Backing" \
1660	-variable [itcl::scope _settings(-backingvisible)] \
1661	-command [itcl::code $this AdjustSetting -backingvisible] \
1662	-font "Arial 9"
1663
1664	checkbutton $inner.stretch \
1665	-text "Stretch to fit" \
1666	-variable [itcl::scope _settings(-stretchtofit)] \
1667	-command [itcl::code $this AdjustSetting -stretchtofit] \
1668	-font "Arial 9"
1669
1670	checkbutton $inner.colormapDiscrete \
1671	-text "Discrete Colormap" \
1672	-variable [itcl::scope _settings(-colormapdiscrete)] \
1673	-command [itcl::code $this AdjustSetting -colormapdiscrete] \
1674	-font "Arial 9"
1675
1676	itk_component add field_l {
1677	label $inner.field_l -text "Field" -font "Arial 9"
1678	} {
1679	ignore -font
1680	}
1681	itk_component add field {
1682	Rappture::Combobox $inner.field -width 10 -editable no
1683	}
1684	bind $inner.field <<Value>> \
1685	[itcl::code $this AdjustSetting -field]
1686
1687	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1688	itk_component add colormap {
1689	Rappture::Combobox $inner.colormap -width 10 -editable no
1690	}
1691	$inner.colormap choices insert end [GetColormapList -includeNone]
1692
1693	$itk_component(colormap) value "BCGYR"
1694	bind $inner.colormap <<Value>> \
1695	[itcl::code $this AdjustSetting -colormap]
1696
1697	label $inner.backingcolor_l -text "Backing Color" -font "Arial 9"
1698	itk_component add backingcolor {
1699	Rappture::Combobox $inner.backingcolor -width 10 -editable no
1700	}
1701	$inner.backingcolor choices insert end \
1702	"black" "black" \
1703	"blue" "blue" \
1704	"cyan" "cyan" \
1705	"green" "green" \
1706	"grey" "grey" \
1707	"magenta" "magenta" \
1708	"orange" "orange" \
1709	"red" "red" \
1710	"white" "white" \
1711	"none" "none"
1712
1713	$itk_component(backingcolor) value $_settings(-backingcolor)
1714	bind $inner.backingcolor <<Value>> \
1715	[itcl::code $this AdjustSetting -backingcolor]
1716
1717	label $inner.background_l -text "Background Color" -font "Arial 9"
1718	itk_component add background {
1719	Rappture::Combobox $inner.background -width 10 -editable no
1720	}
1721	$inner.background choices insert end \
1722	"black" "black" \
1723	"white" "white" \
1724	"grey" "grey"
1725
1726	$itk_component(background) value "white"
1727	bind $inner.background <<Value>> \
1728	[itcl::code $this AdjustSetting -background]
1729
1730	itk_component add opacity_l {
1731	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1732	} {
1733	ignore -font
1734	}
1735	itk_component add opacity {
1736	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1737	-variable [itcl::scope _settings(-opacity)] \
1738	-showvalue off \
1739	-command [itcl::code $this AdjustSetting -opacity]
1740	}
1741
1742	itk_component add window_l {
1743	label $inner.window_l -text "Window" -font "Arial 9"
1744	} {
1745	ignore -font
1746	}
1747	itk_component add window {
1748	::scale $inner.window -from 0 -to 255 -orient horizontal \
1749	-variable [itcl::scope _settings(-window)] \
1750	-showvalue off \
1751	-command [itcl::code $this AdjustSetting -window]
1752	}
1753	itk_component add level_l {
1754	label $inner.level_l -text "Level" -font "Arial 9"
1755	} {
1756	ignore -font
1757	}
1758	itk_component add level {
1759	::scale $inner.level -from 0 -to 255 -orient horizontal \
1760	-variable [itcl::scope _settings(-level)] \
1761	-showvalue off \
1762	-command [itcl::code $this AdjustSetting -level]
1763	}
1764
1765	frame $inner.separator1 -height 2 -relief sunken -bd 1
1766	frame $inner.separator2 -height 2 -relief sunken -bd 1
1767
1768	blt::table $inner \
1769	0,0 $inner.field_l -anchor w -pady 2 \
1770	0,1 $inner.field -anchor w -pady 2 -fill x \
1771	1,0 $inner.colormap_l -anchor w -pady 2 \
1772	1,1 $inner.colormap -anchor w -pady 2 -fill x \
1773	2,0 $inner.backingcolor_l -anchor w -pady 2 \
1774	2,1 $inner.backingcolor -anchor w -pady 2 -fill x \
1775	3,0 $inner.background_l -anchor w -pady 2 \
1776	3,1 $inner.background -anchor w -pady 2 -fill x \
1777	4,0 $inner.backing -anchor w -pady 2 -cspan 2 \
1778	5,0 $inner.stretch -anchor w -pady 2 -cspan 2 \
1779	7,0 $inner.legend -anchor w -pady 2 -cspan 2 \
1780	8,0 $inner.colormapDiscrete -anchor w -pady 2 -cspan 2 \
1781	11,0 $inner.separator1 -padx 2 -fill x -cspan 2 \
1782	12,0 $inner.outline -anchor w -pady 2 -cspan 2 \
1783	13,0 $inner.separator2 -padx 2 -fill x -cspan 2 \
1784	15,0 $inner.opacity_l -anchor w -pady 2 \
1785	15,1 $inner.opacity -fill x -pady 2 \
1786	16,0 $inner.window_l -anchor w -pady 2 \
1787	16,1 $inner.window -fill x -pady 2 \
1788	17,0 $inner.level_l -anchor w -pady 2 \
1789	17,1 $inner.level -fill x -pady 2
1790
1791	blt::table configure $inner r* c* -resize none
1792	blt::table configure $inner r19 c1 -resize expand
1793	}
1794
1795	itcl::body Rappture::VtkImageViewer::BuildAxisTab {} {
1796
1797	set fg [option get $itk_component(hull) font Font]
1798	#set bfg [option get $itk_component(hull) boldFont Font]
1799
1800	set inner [$itk_component(main) insert end \
1801	-title "Axis Settings" \
1802	-icon [Rappture::icon axis2]]
1803	$inner configure -borderwidth 4
1804
1805	checkbutton $inner.visible \
1806	-text "Axes" \
1807	-variable [itcl::scope _settings(-axisvisible)] \
1808	-command [itcl::code $this AdjustSetting -axisvisible] \
1809	-font "Arial 9"
1810	checkbutton $inner.labels \
1811	-text "Axis Labels" \
1812	-variable [itcl::scope _settings(-axislabels)] \
1813	-command [itcl::code $this AdjustSetting -axislabels] \
1814	-font "Arial 9"
1815	label $inner.grid_l -text "Grid" -font "Arial 9"
1816	checkbutton $inner.xgrid \
1817	-text "X" \
1818	-variable [itcl::scope _settings(-xgrid)] \
1819	-command [itcl::code $this AdjustSetting -xgrid] \
1820	-font "Arial 9"
1821	checkbutton $inner.ygrid \
1822	-text "Y" \
1823	-variable [itcl::scope _settings(-ygrid)] \
1824	-command [itcl::code $this AdjustSetting -ygrid] \
1825	-font "Arial 9"
1826	checkbutton $inner.zgrid \
1827	-text "Z" \
1828	-variable [itcl::scope _settings(-zgrid)] \
1829	-command [itcl::code $this AdjustSetting -zgrid] \
1830	-font "Arial 9"
1831	checkbutton $inner.minorticks \
1832	-text "Minor Ticks" \
1833	-variable [itcl::scope _settings(-axisminorticks)] \
1834	-command [itcl::code $this AdjustSetting -axisminorticks] \
1835	-font "Arial 9"
1836
1837	label $inner.mode_l -text "Mode" -font "Arial 9"
1838
1839	itk_component add axisflymode {
1840	Rappture::Combobox $inner.mode -width 10 -editable no
1841	}
1842	$inner.mode choices insert end \
1843	"static_triad" "static" \
1844	"closest_triad" "closest" \
1845	"furthest_triad" "farthest" \
1846	"outer_edges" "outer"
1847	$itk_component(axisflymode) value $_settings(-axisflymode)
1848	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting -axisflymode]
1849
1850	blt::table $inner \
1851	0,0 $inner.visible -anchor w -cspan 4 \
1852	1,0 $inner.labels -anchor w -cspan 4 \
1853	2,0 $inner.minorticks -anchor w -cspan 4 \
1854	4,0 $inner.grid_l -anchor w \
1855	4,1 $inner.xgrid -anchor w \
1856	4,2 $inner.ygrid -anchor w \
1857	4,3 $inner.zgrid -anchor w \
1858	5,0 $inner.mode_l -anchor w -padx { 2 0 } \
1859	5,1 $inner.mode -fill x -cspan 3
1860
1861	blt::table configure $inner r* c* -resize none
1862	blt::table configure $inner r7 c6 -resize expand
1863	blt::table configure $inner r3 -height 0.125i
1864	}
1865
1866	itcl::body Rappture::VtkImageViewer::BuildCameraTab {} {
1867	set inner [$itk_component(main) insert end \
1868	-title "Camera Settings" \
1869	-icon [Rappture::icon camera]]
1870	$inner configure -borderwidth 4
1871
1872	label $inner.view_l -text "view" -font "Arial 9"
1873	set f [frame $inner.view]
1874	foreach side { front back left right top bottom } {
1875	button $f.$side -image [Rappture::icon view$side] \
1876	-command [itcl::code $this SetOrientation $side]
1877	Rappture::Tooltip::for $f.$side "Change the view to $side"
1878	pack $f.$side -side left
1879	}
1880
1881	blt::table $inner \
1882	0,0 $inner.view_l -anchor e -pady 2 \
1883	0,1 $inner.view -anchor w -pady 2
1884	blt::table configure $inner r0 -resize none
1885
1886	set labels { qx qy qz qw xpan ypan zoom }
1887	set row 1
1888	foreach tag $labels {
1889	label $inner.${tag}label -text $tag -font "Arial 9"
1890	entry $inner.${tag} -font "Arial 9" -bg white \
1891	-textvariable [itcl::scope _view(-$tag)]
1892	bind $inner.${tag} <Return> \
1893	[itcl::code $this camera set -${tag}]
1894	bind $inner.${tag} <KP_Enter> \
1895	[itcl::code $this camera set -${tag}]
1896	blt::table $inner \
1897	$row,0 $inner.${tag}label -anchor e -pady 2 \
1898	$row,1 $inner.${tag} -anchor w -pady 2
1899	blt::table configure $inner r$row -resize none
1900	incr row
1901	}
1902	checkbutton $inner.ortho \
1903	-text "Orthographic Projection" \
1904	-variable [itcl::scope _view(-ortho)] \
1905	-command [itcl::code $this camera set -ortho] \
1906	-font "Arial 9"
1907	blt::table $inner \
1908	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1909	blt::table configure $inner r$row -resize none
1910	incr row
1911
1912	blt::table configure $inner c* -resize none
1913	blt::table configure $inner c2 -resize expand
1914	blt::table configure $inner r$row -resize expand
1915	}
1916
1917	#
1918	# camera --
1919	#
1920	itcl::body Rappture::VtkImageViewer::camera {option args} {
1921	switch -- $option {
1922	"show" {
1923	puts [array get _view]
1924	}
1925	"set" {
1926	set what [lindex $args 0]
1927	set x $_view($what)
1928	set code [catch { string is double $x } result]
1929	if { $code != 0 \|\| !$result } {
1930	return
1931	}
1932	switch -- $what {
1933	"-ortho" {
1934	if {$_view($what)} {
1935	SendCmd "camera mode ortho"
1936	} else {
1937	SendCmd "camera mode persp"
1938	}
1939	}
1940	"-xpan" - "-ypan" {
1941	PanCamera
1942	}
1943	"-qx" - "-qy" - "-qz" - "-qw" {
1944	set q [ViewToQuaternion]
1945	$_arcball quaternion $q
1946	EventuallyRotate $q
1947	}
1948	"-zoom" {
1949	SendCmd "camera zoom $_view($what)"
1950	}
1951	}
1952	}
1953	}
1954	}
1955
1956	itcl::body Rappture::VtkImageViewer::GetVtkData { args } {
1957	set bytes ""
1958	foreach dataobj [get] {
1959	foreach comp [$dataobj components] {
1960	set tag $dataobj-$comp
1961	set contents [$dataobj vtkdata $comp]
1962	append bytes "$contents\n"
1963	}
1964	}
1965	return [list .vtk $bytes]
1966	}
1967
1968	itcl::body Rappture::VtkImageViewer::GetImage { args } {
1969	if { [image width $_image(download)] > 0 &&
1970	[image height $_image(download)] > 0 } {
1971	set bytes [$_image(download) data -format "jpeg -quality 100"]
1972	set bytes [Rappture::encoding::decode -as b64 $bytes]
1973	return [list .jpg $bytes]
1974	}
1975	return ""
1976	}
1977
1978	itcl::body Rappture::VtkImageViewer::BuildDownloadPopup { popup command } {
1979	Rappture::Balloon $popup \
1980	-title "[Rappture::filexfer::label downloadWord] as..."
1981	set inner [$popup component inner]
1982	label $inner.summary -text "" -anchor w
1983	radiobutton $inner.vtk_button -text "VTK data file" \
1984	-variable [itcl::scope _downloadPopup(format)] \
1985	-font "Arial 9 " \
1986	-value vtk
1987	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
1988	radiobutton $inner.image_button -text "Image File" \
1989	-variable [itcl::scope _downloadPopup(format)] \
1990	-font "Arial 9 " \
1991	-value image
1992	Rappture::Tooltip::for $inner.image_button \
1993	"Save as digital image."
1994
1995	button $inner.ok -text "Save" \
1996	-highlightthickness 0 -pady 2 -padx 3 \
1997	-command $command \
1998	-compound left \
1999	-image [Rappture::icon download]
2000
2001	button $inner.cancel -text "Cancel" \
2002	-highlightthickness 0 -pady 2 -padx 3 \
2003	-command [list $popup deactivate] \
2004	-compound left \
2005	-image [Rappture::icon cancel]
2006
2007	blt::table $inner \
2008	0,0 $inner.summary -cspan 2 \
2009	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2010	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2011	4,1 $inner.cancel -width .9i -fill y \
2012	4,0 $inner.ok -padx 2 -width .9i -fill y
2013	blt::table configure $inner r3 -height 4
2014	blt::table configure $inner r4 -pady 4
2015	raise $inner.image_button
2016	$inner.vtk_button invoke
2017	return $inner
2018	}
2019
2020	#
2021	# SetObjectStyle --
2022	#
2023	# Set the style of the image/contour object. This gets calls
2024	# for each dataset once as it is loaded. It can overridden by
2025	# the user controls.
2026	#
2027	#
2028	itcl::body Rappture::VtkImageViewer::SetObjectStyle { dataobj comp } {
2029	# Parse style string.
2030	set tag $dataobj-$comp
2031	array set style {
2032	-color none
2033	-opacity 1.0
2034	}
2035	set stylelist [$dataobj style $comp]
2036	if { $stylelist != "" } {
2037	array set style $stylelist
2038	}
2039	# This is too complicated. We want to set the colormap, number of
2040	# isolines and opacity for the dataset. They can be the default values,
2041	# the style hints loaded with the dataset, or set by user controls. As
2042	# datasets get loaded, they first use the defaults that are overidden
2043	# by the style hints. If the user changes the global controls, then that
2044	# overrides everything else. I don't know what it means when global
2045	# controls are specified as style hints by each dataset. It complicates
2046	# the code to handle aberrant cases.
2047
2048	if { $_changed(-opacity) } {
2049	set style(-opacity) [expr $_settings(-opacity) * 0.01]
2050	}
2051	if { $_changed(-colormap) } {
2052	set style(-color) $_settings(-colormap)
2053	}
2054	if { $_currentColormap == "" } {
2055	$itk_component(colormap) value $style(-color)
2056	}
2057	if { [info exists style(-stretchtofit)] } {
2058	set _settings(-stretchtofit) $style(-stretchtofit)
2059	AdjustSetting -stretchToFit
2060	}
2061	SendCmd "outline add $tag"
2062	SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
2063	SendCmd "outline visible $_settings(-outline) $tag"
2064	SendCmd "image add $tag"
2065	SetCurrentColormap $style(-color)
2066	set color [$itk_component(backingcolor) value]
2067	SendCmd "image color [Color2RGB $color] $tag"
2068	SendCmd "image opacity $style(-opacity) $tag"
2069	set _settings(-opacity) [expr $style(-opacity) * 100.0]
2070	}
2071
2072	itcl::body Rappture::VtkImageViewer::IsValidObject { dataobj } {
2073	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2074	return 0
2075	}
2076	return 1
2077	}
2078
2079	# ----------------------------------------------------------------------
2080	# USAGE: ReceiveLegend <colormap> <title> <min> <max> <size>
2081	#
2082	# Invoked automatically whenever the "legend" command comes in from
2083	# the rendering server. Indicates that binary image data with the
2084	# specified <size> will follow.
2085	# ----------------------------------------------------------------------
2086	itcl::body Rappture::VtkImageViewer::ReceiveLegend { colormap title min max size } {
2087	#puts stderr "ReceiveLegend colormap=$colormap title=$title range=$min,$max size=$size"
2088	if { [isconnected] } {
2089	set bytes [ReceiveBytes $size]
2090	if { ![info exists _image(legend)] } {
2091	set _image(legend) [image create photo]
2092	}
2093	$_image(legend) configure -data $bytes
2094	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2095	if { [catch {DrawLegend} errs] != 0 } {
2096	global errorInfo
2097	puts stderr "errs=$errs errorInfo=$errorInfo"
2098	}
2099	}
2100	}
2101
2102	#
2103	# DrawLegend --
2104	#
2105	# Draws the legend in the own canvas on the right side of the plot area.
2106	#
2107	itcl::body Rappture::VtkImageViewer::DrawLegend {} {
2108	set fname $_curFldName
2109	set c $itk_component(view)
2110	set w [winfo width $c]
2111	set h [winfo height $c]
2112	set font "Arial 8"
2113	set lineht [font metrics $font -linespace]
2114
2115	if { [string match "component*" $fname] } {
2116	set title ""
2117	} else {
2118	if { [info exists _fields($fname)] } {
2119	foreach { title units } $_fields($fname) break
2120	if { $units != "" } {
2121	set title [format "%s (%s)" $title $units]
2122	}
2123	} else {
2124	set title $fname
2125	}
2126	}
2127	set x [expr $w - 2]
2128	if { !$_settings(-legendvisible) } {
2129	$c delete legend
2130	return
2131	}
2132	if { [$c find withtag "legend"] == "" } {
2133	set y 2
2134	# If there's a legend title, create a text item for the title.
2135	$c create text $x $y \
2136	-anchor ne \
2137	-fill $itk_option(-plotforeground) -tags "title legend" \
2138	-font $font
2139	if { $title != "" } {
2140	incr y $lineht
2141	}
2142	$c create text $x $y \
2143	-anchor ne \
2144	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2145	-font $font
2146	incr y $lineht
2147	$c create image $x $y \
2148	-anchor ne \
2149	-image $_image(legend) -tags "colormap legend"
2150	$c create rectangle $x $y 1 1 \
2151	-fill "" -outline "" -tags "sensor legend"
2152	$c create text $x [expr {$h-2}] \
2153	-anchor se \
2154	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2155	-font $font
2156	$c bind sensor <Enter> [itcl::code $this EnterLegend %x %y]
2157	$c bind sensor <Leave> [itcl::code $this LeaveLegend]
2158	$c bind sensor <Motion> [itcl::code $this MotionLegend %x %y]
2159	}
2160
2161	set x2 $x
2162	set iw [image width $_image(legend)]
2163	set ih [image height $_image(legend)]
2164	set x1 [expr $x2 - ($iw*12)/10]
2165
2166	$c bind title <ButtonPress> [itcl::code $this Combo post]
2167	$c bind title <Enter> [itcl::code $this Combo activate]
2168	$c bind title <Leave> [itcl::code $this Combo deactivate]
2169	# Reset the item coordinates according the current size of the plot.
2170	if { [info exists _limits($_curFldName)] } {
2171	foreach { vmin vmax } $_limits($_curFldName) break
2172	$c itemconfigure vmin -text [format %g $vmin]
2173	$c itemconfigure vmax -text [format %g $vmax]
2174	}
2175	set y 2
2176	# If there's a legend title, move the title to the correct position
2177	if { $title != "" } {
2178	$c itemconfigure title -text $title
2179	$c coords title $x $y
2180	incr y $lineht
2181	}
2182	$c coords vmax $x $y
2183	incr y $lineht
2184	$c coords colormap $x $y
2185	$c coords sensor [expr $x - $iw] $y $x [expr $y + $ih]
2186	$c raise sensor
2187	$c coords vmin $x [expr {$h - 2}]
2188	}
2189
2190	#
2191	# EnterLegend --
2192	#
2193	itcl::body Rappture::VtkImageViewer::EnterLegend { x y } {
2194	SetLegendTip $x $y
2195	}
2196
2197	#
2198	# MotionLegend --
2199	#
2200	itcl::body Rappture::VtkImageViewer::MotionLegend { x y } {
2201	Rappture::Tooltip::tooltip cancel
2202	set c $itk_component(view)
2203	set cw [winfo width $c]
2204	set ch [winfo height $c]
2205	if { $x >= 0 && $x < $cw && $y >= 0 && $y < $ch } {
2206	SetLegendTip $x $y
2207	}
2208	}
2209
2210	#
2211	# LeaveLegend --
2212	#
2213	itcl::body Rappture::VtkImageViewer::LeaveLegend { } {
2214	Rappture::Tooltip::tooltip cancel
2215	.rappturetooltip configure -icon ""
2216	}
2217
2218	#
2219	# SetLegendTip --
2220	#
2221	itcl::body Rappture::VtkImageViewer::SetLegendTip { x y } {
2222	set fname $_curFldName
2223	set c $itk_component(view)
2224	set w [winfo width $c]
2225	set h [winfo height $c]
2226	set font "Arial 8"
2227	set lineht [font metrics $font -linespace]
2228
2229	set ih [image height $_image(legend)]
2230	# Subtract off the offset of the color ramp from the top of the canvas
2231	set iy [expr $y - ($lineht + 2)]
2232
2233	if { [string match "component*" $fname] } {
2234	set title ""
2235	} else {
2236	if { [info exists _fields($fname)] } {
2237	foreach { title units } $_fields($fname) break
2238	if { $units != "" } {
2239	set title [format "%s (%s)" $title $units]
2240	}
2241	} else {
2242	set title $fname
2243	}
2244	}
2245	# If there's a legend title, increase the offset by the line height.
2246	if { $title != "" } {
2247	incr iy -$lineht
2248	}
2249
2250	# Make a swatch of the selected color
2251	if { [catch { $_image(legend) get 10 $iy } pixel] != 0 } {
2252	return
2253	}
2254
2255	if { ![info exists _image(swatch)] } {
2256	set _image(swatch) [image create photo -width 24 -height 24]
2257	}
2258	set color [eval format "\#%02x%02x%02x" $pixel]
2259	$_image(swatch) put black -to 0 0 23 23
2260	$_image(swatch) put $color -to 1 1 22 22
2261
2262	# Compute the value of the point
2263	if { [info exists _limits($fname)] } {
2264	foreach { vmin vmax } $_limits($fname) break
2265	set t [expr 1.0 - (double($iy) / double($ih-1))]
2266	set value [expr $t * ($vmax - $vmin) + $vmin]
2267	} else {
2268	set value 0.0
2269	}
2270	set tipx [expr $x + 15]
2271	set tipy [expr $y - 5]
2272	.rappturetooltip configure -icon $_image(swatch)
2273	if { [info exists _isolines($y)] } {
2274	Rappture::Tooltip::text $c [format "$title %g (isoline)" $_isolines($y)]
2275	} else {
2276	Rappture::Tooltip::text $c [format "$title %g" $value]
2277	}
2278	Rappture::Tooltip::tooltip show $c +$tipx,+$tipy
2279	}
2280
2281	# ----------------------------------------------------------------------
2282	# USAGE: _dropdown post
2283	# USAGE: _dropdown unpost
2284	# USAGE: _dropdown select
2285	#
2286	# Used internally to handle the dropdown list for this combobox. The
2287	# post/unpost options are invoked when the list is posted or unposted
2288	# to manage the relief of the controlling button. The select option
2289	# is invoked whenever there is a selection from the list, to assign
2290	# the value back to the gauge.
2291	# ----------------------------------------------------------------------
2292	itcl::body Rappture::VtkImageViewer::Combo {option} {
2293	set c $itk_component(view)
2294	switch -- $option {
2295	post {
2296	foreach { x1 y1 x2 y2 } [$c bbox title] break
2297	set x1 [expr [winfo width $itk_component(view)] - [winfo reqwidth $itk_component(fieldmenu)]]
2298	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2299	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2300	tk_popup $itk_component(fieldmenu) $x $y
2301	}
2302	activate {
2303	$c itemconfigure title -fill red
2304	}
2305	deactivate {
2306	$c itemconfigure title -fill $itk_option(-plotforeground)
2307	}
2308	invoke {
2309	$itk_component(field) value $_curFldLabel
2310	AdjustSetting -field
2311	}
2312	default {
2313	error "bad option \"$option\": should be post, unpost, select"
2314	}
2315	}
2316	}
2317
2318	itcl::body Rappture::VtkImageViewer::SetOrientation { side } {
2319	array set positions {
2320	front "0.707107 0.707107 0 0"
2321	back "0 0 0.707107 0.707107"
2322	left "0.5 0.5 -0.5 -0.5"
2323	right "0.5 0.5 0.5 0.5"
2324	top "1 0 0 0"
2325	bottom "0 1 0 0"
2326	}
2327	foreach name { -qw -qx -qy -qz } value $positions($side) {
2328	set _view($name) $value
2329	}
2330	set q [ViewToQuaternion]
2331	$_arcball quaternion $q
2332	SendCmd "camera orient $q"
2333	SendCmd "camera reset"
2334	set _view(-xpan) 0
2335	set _view(-ypan) 0
2336	set _view(-zoom) 1.0
2337	}

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