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source: branches/r9/gui/scripts/vtkimageviewer.tcl @ 4914

Last change on this file since 4914 was 4344, checked in by ldelgass, 10 years ago
Add VTK surface viewer for viewing colormapped surfaces from any field.
File size: 77.1 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 limits3 { dataobj }
61	public method parameters {title args} {
62	# do nothing
63	}
64	public method scale {args}
65
66	protected method Connect {}
67	protected method CurrentDatasets {args}
68	protected method Disconnect {}
69	protected method DoResize {}
70	protected method DoRotate {}
71	protected method AdjustSetting {what {value ""}}
72	protected method AdjustMode {}
73	protected method InitSettings { args }
74	protected method Pan {option x y}
75	protected method Pick {x y}
76	protected method Rebuild {}
77	protected method ReceiveDataset { args }
78	protected method ReceiveImage { args }
79	protected method ReceiveLegend { colormap title min max size }
80	protected method Rotate {option x y}
81	protected method Zoom {option}
82
83	# The following methods are only used by this class.
84	private method BuildAxisTab {}
85	private method BuildCameraTab {}
86	private method BuildColormap { name }
87	private method BuildImageTab {}
88	private method BuildDownloadPopup { widget command }
89	private method Combo { option }
90	private method DrawLegend {}
91	private method EnterLegend { x y }
92	private method EventuallyRequestLegend {}
93	private method EventuallyResize { w h }
94	private method EventuallyRotate { q }
95	private method GetImage { args }
96	private method GetVtkData { args }
97	private method IsValidObject { dataobj }
98	private method LeaveLegend {}
99	private method MotionLegend { x y }
100	private method PanCamera {}
101	private method RequestLegend {}
102	private method SetCurrentColormap { color }
103	private method SetLegendTip { x y }
104	private method SetObjectStyle { dataobj comp }
105	private method SetOrientation { side }
106
107	private variable _arcball ""
108	private variable _dlist "" ; # list of data objects
109	private variable _obj2datasets
110	private variable _obj2ovride ; # maps dataobj => style override
111	private variable _datasets ; # contains all the dataobj-component
112	; # datasets in the server
113	private variable _colormaps ; # contains all the colormaps
114	; # in the server.
115
116	# The name of the current colormap used. The colormap is global to all
117	# images displayed.
118	private variable _currentColormap ""
119	private variable _currentNumIsolines -1
120	private variable _currentOpacity ""
121
122	private variable _maxScale 100; # This is the # of times the x-axis
123	# and y-axis ranges can differ before
124	# automatically turning on
125	# -stretchtofit
126
127	private variable _click ; # info used for rotate operations
128	private variable _limits ; # Holds overall limits for all dataobjs
129	# using the viewer.
130	private variable _view ; # view params for 3D view
131	private variable _settings
132	private variable _changed
133	private variable _initialStyle ""; # First found style in dataobjects.
134	private variable _reset 1; # Indicates if camera needs to be reset
135	# to starting position.
136	private variable _beforeConnect 1; # Indicates if camera needs to be reset
137	# to starting position.
138
139	private variable _first "" ; # This is the topmost dataset.
140	private variable _start 0
141	private variable _isolines
142	private variable _contourList ""
143
144	common _downloadPopup; # download options from popup
145	private common _hardcopy
146	private variable _width 0
147	private variable _height 0
148	private variable _legendWidth 0
149	private variable _legendHeight 0
150	private variable _resizePending 0
151	private variable _rotatePending 0
152	private variable _legendPending 0
153	private variable _fieldNames {}
154	private variable _fields
155	private variable _curFldName ""
156	private variable _curFldLabel ""
157	private variable _colorMode "scalar";# Mode of colormap (vmag or scalar)
158	}
159
160	itk::usual VtkImageViewer {
161	keep -background -foreground -cursor -font
162	keep -plotbackground -plotforeground -mode
163	}
164
165	# ----------------------------------------------------------------------
166	# CONSTRUCTOR
167	# ----------------------------------------------------------------------
168	itcl::body Rappture::VtkImageViewer::constructor {hostlist args} {
169	set _serverType "vtkvis"
170
171	EnableWaitDialog 900
172	# Rebuild event
173	$_dispatcher register !rebuild
174	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
175
176	# Resize event
177	$_dispatcher register !resize
178	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
179
180	# Rotate event
181	$_dispatcher register !rotate
182	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
183
184	# Legend event
185	$_dispatcher register !legend
186	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
187
188	#
189	# Populate parser with commands handle incoming requests
190	#
191	$_parser alias image [itcl::code $this ReceiveImage]
192	$_parser alias dataset [itcl::code $this ReceiveDataset]
193	$_parser alias legend [itcl::code $this ReceiveLegend]
194
195	# Create image for legend colorbar.
196	set _image(legend) [image create photo]
197
198	# Initialize the view to some default parameters.
199	array set _view {
200	qw 0.36
201	qx 0.25
202	qy 0.50
203	qz 0.70
204	zoom 1.0
205	xpan 0
206	ypan 0
207	ortho 0
208	}
209	set _arcball [blt::arcball create 100 100]
210	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
211	$_arcball quaternion $q
212
213	array set _settings {
214	axisFlymode "static"
215	axisLabels 1
216	axisMinorTicks 1
217	axisVisible 1
218	axisXGrid 0
219	axisYGrid 0
220	axisZGrid 0
221	backingColor white
222	backingVisible 1
223	colormapDiscrete 0
224	field "Default"
225	legendVisible 0
226	level 127.5
227	numColors 256
228	opacity 100
229	outline 0
230	saveOpacity 100
231	stretchToFit 0
232	view3D 0
233	window 255.0
234	}
235	array set _changed {
236	opacity 0
237	colormap 0
238	}
239	itk_component add view {
240	canvas $itk_component(plotarea).view \
241	-highlightthickness 0 -borderwidth 0
242	} {
243	usual
244	ignore -highlightthickness -borderwidth -background
245	}
246
247	itk_component add fieldmenu {
248	menu $itk_component(plotarea).menu \
249	-relief flat \
250	-tearoff no
251	} {
252	usual
253	ignore -background -foreground -relief -tearoff
254	}
255	set c $itk_component(view)
256	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
257	bind $c <4> [itcl::code $this Zoom in 0.25]
258	bind $c <5> [itcl::code $this Zoom out 0.25]
259	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
260	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
261	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
262	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
263	bind $c <Enter> "focus %W"
264	bind $c <Control-F1> [itcl::code $this ToggleConsole]
265
266	# Fix the scrollregion in case we go off screen
267	$c configure -scrollregion [$c bbox all]
268
269	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
270	set _map(cwidth) -1
271	set _map(cheight) -1
272	set _map(zoom) 1.0
273	set _map(original) ""
274
275	set f [$itk_component(main) component controls]
276	itk_component add reset {
277	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
278	-highlightthickness 0 \
279	-image [Rappture::icon reset-view] \
280	-command [itcl::code $this Zoom reset]
281	} {
282	usual
283	ignore -highlightthickness
284	}
285	pack $itk_component(reset) -side top -padx 2 -pady { 2 0 }
286	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
287
288	itk_component add zoomin {
289	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
290	-highlightthickness 0 \
291	-image [Rappture::icon zoom-in] \
292	-command [itcl::code $this Zoom in]
293	} {
294	usual
295	ignore -highlightthickness
296	}
297	pack $itk_component(zoomin) -side top -padx 2 -pady { 2 0 }
298	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
299
300	itk_component add zoomout {
301	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
302	-highlightthickness 0 \
303	-image [Rappture::icon zoom-out] \
304	-command [itcl::code $this Zoom out]
305	} {
306	usual
307	ignore -highlightthickness
308	}
309	pack $itk_component(zoomout) -side top -padx 2 -pady { 2 0 }
310	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
311
312	itk_component add mode {
313	Rappture::PushButton $f.mode \
314	-onimage [Rappture::icon surface] \
315	-offimage [Rappture::icon surface] \
316	-variable [itcl::scope _settings(view3D)] \
317	-command [itcl::code $this AdjustSetting view3D] \
318	}
319	Rappture::Tooltip::for $itk_component(mode) \
320	"Toggle the surface/contour on/off"
321	pack $itk_component(mode) -padx 2 -pady { 2 0 }
322
323	itk_component add stretchtofit {
324	Rappture::PushButton $f.stretchtofit \
325	-onimage [Rappture::icon stretchtofit] \
326	-offimage [Rappture::icon stretchtofit] \
327	-variable [itcl::scope _settings(stretchToFit)] \
328	-command [itcl::code $this AdjustSetting stretchToFit] \
329	}
330	Rappture::Tooltip::for $itk_component(stretchtofit) \
331	"Stretch plot to fit window on/off"
332	pack $itk_component(stretchtofit) -padx 2 -pady 2
333
334	if { [catch {
335	BuildImageTab
336	BuildAxisTab
337	BuildCameraTab
338	} errs] != 0 } {
339	global errorInfo
340	puts stderr "errs=$errs errorInfo=$errorInfo"
341	}
342
343	# Hack around the Tk panewindow. The problem is that the requested
344	# size of the 3d view isn't set until an image is retrieved from
345	# the server. So the panewindow uses the tiny size.
346	set w 10000
347	pack forget $itk_component(view)
348	blt::table $itk_component(plotarea) \
349	0,0 $itk_component(view) -fill both -reqwidth $w
350	blt::table configure $itk_component(plotarea) c1 -resize none
351
352	# Bindings for panning via mouse
353	bind $itk_component(view) <ButtonPress-2> \
354	[itcl::code $this Pan click %x %y]
355	bind $itk_component(view) <B2-Motion> \
356	[itcl::code $this Pan drag %x %y]
357	bind $itk_component(view) <ButtonRelease-2> \
358	[itcl::code $this Pan release %x %y]
359
360	#bind $itk_component(view) <ButtonRelease-3> \
361	# [itcl::code $this Pick %x %y]
362
363	# Bindings for panning via keyboard
364	bind $itk_component(view) <KeyPress-Left> \
365	[itcl::code $this Pan set -10 0]
366	bind $itk_component(view) <KeyPress-Right> \
367	[itcl::code $this Pan set 10 0]
368	bind $itk_component(view) <KeyPress-Up> \
369	[itcl::code $this Pan set 0 -10]
370	bind $itk_component(view) <KeyPress-Down> \
371	[itcl::code $this Pan set 0 10]
372	bind $itk_component(view) <Shift-KeyPress-Left> \
373	[itcl::code $this Pan set -2 0]
374	bind $itk_component(view) <Shift-KeyPress-Right> \
375	[itcl::code $this Pan set 2 0]
376	bind $itk_component(view) <Shift-KeyPress-Up> \
377	[itcl::code $this Pan set 0 -2]
378	bind $itk_component(view) <Shift-KeyPress-Down> \
379	[itcl::code $this Pan set 0 2]
380
381	# Bindings for zoom via keyboard
382	bind $itk_component(view) <KeyPress-Prior> \
383	[itcl::code $this Zoom out]
384	bind $itk_component(view) <KeyPress-Next> \
385	[itcl::code $this Zoom in]
386
387	bind $itk_component(view) <Enter> "focus $itk_component(view)"
388
389	if {[string equal "x11" [tk windowingsystem]]} {
390	# Bindings for zoom via mouse
391	bind $itk_component(view) <4> [itcl::code $this Zoom out]
392	bind $itk_component(view) <5> [itcl::code $this Zoom in]
393	}
394
395	set _image(download) [image create photo]
396	eval itk_initialize $args
397	Connect
398	set _beforeConnect 0
399	}
400
401	# ----------------------------------------------------------------------
402	# DESTRUCTOR
403	# ----------------------------------------------------------------------
404	itcl::body Rappture::VtkImageViewer::destructor {} {
405	Disconnect
406	image delete $_image(plot)
407	image delete $_image(download)
408	catch { blt::arcball destroy $_arcball }
409	}
410
411	itcl::body Rappture::VtkImageViewer::DoResize {} {
412	if { $_width < 2 } {
413	set _width 500
414	}
415	if { $_height < 2 } {
416	set _height 500
417	}
418	set _start [clock clicks -milliseconds]
419	SendCmd "screen size [expr $_width - 20] $_height"
420
421	set font "Arial 8"
422	set lh [font metrics $font -linespace]
423	set h [expr {$_height - 2 * ($lh + 2)}]
424	if { $h != $_legendHeight } {
425	EventuallyRequestLegend
426	} else {
427	DrawLegend
428	}
429	set _resizePending 0
430	}
431
432	itcl::body Rappture::VtkImageViewer::DoRotate {} {
433	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
434	SendCmd "camera orient $q"
435	set _rotatePending 0
436	}
437
438	itcl::body Rappture::VtkImageViewer::EventuallyRequestLegend {} {
439	if { !$_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	foreach { _view(qw) _view(qx) _view(qy) _view(qz) } $q break
459	if { !$_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 "hub" [exec hostname]
759	lappend info "client" "vtkimageviewer"
760	lappend info "user" $user
761	lappend info "session" $session
762	SendCmd "clientinfo [list $info]"
763	}
764	set w [winfo width $itk_component(view)]
765	set h [winfo height $itk_component(view)]
766	EventuallyResize $w $h
767	}
768	return $result
769	}
770
771	#
772	# isconnected --
773	#
774	# Indicates if we are currently connected to the visualization server.
775	#
776	itcl::body Rappture::VtkImageViewer::isconnected {} {
777	return [VisViewer::IsConnected]
778	}
779
780	#
781	# disconnect --
782	#
783	itcl::body Rappture::VtkImageViewer::disconnect {} {
784	Disconnect
785	set _reset 1
786	}
787
788	#
789	# Disconnect --
790	#
791	# Clients use this method to disconnect from the current rendering
792	# server.
793	#
794	itcl::body Rappture::VtkImageViewer::Disconnect {} {
795	VisViewer::Disconnect
796
797	$_dispatcher cancel !rebuild
798	$_dispatcher cancel !resize
799	$_dispatcher cancel !rotate
800	$_dispatcher cancel !legend
801	# disconnected -- no more data sitting on server
802	array unset _datasets
803	array unset _data
804	array unset _colormaps
805	array unset _obj2datasets
806	global readyForNextFrame
807	set readyForNextFrame 1
808	}
809
810	# ----------------------------------------------------------------------
811	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
812	#
813	# Invoked automatically whenever the "image" command comes in from
814	# the rendering server. Indicates that binary image data with the
815	# specified <size> will follow.
816	# ----------------------------------------------------------------------
817	itcl::body Rappture::VtkImageViewer::ReceiveImage { args } {
818	global readyForNextFrame
819	set readyForNextFrame 1
820	array set info {
821	-token "???"
822	-bytes 0
823	-type image
824	}
825	array set info $args
826	set bytes [ReceiveBytes $info(-bytes)]
827	if { $info(-type) == "image" } {
828	if 0 {
829	set f [open "last.ppm" "w"]
830	puts $f $bytes
831	close $f
832	}
833	$_image(plot) configure -data $bytes
834	set time [clock seconds]
835	set date [clock format $time]
836	#puts stderr "$date: received image [image width $_image(plot)]x[image height $_image(plot)] image>"
837	if { $_start > 0 } {
838	set finish [clock clicks -milliseconds]
839	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
840	set _start 0
841	}
842	} elseif { $info(type) == "print" } {
843	set tag $this-print-$info(-token)
844	set _hardcopy($tag) $bytes
845	}
846	}
847
848	#
849	# ReceiveDataset --
850	#
851	itcl::body Rappture::VtkImageViewer::ReceiveDataset { args } {
852	if { ![isconnected] } {
853	return
854	}
855	set option [lindex $args 0]
856	switch -- $option {
857	"scalar" {
858	set option [lindex $args 1]
859	switch -- $option {
860	"world" {
861	foreach { x y z value tag } [lrange $args 2 end] break
862	}
863	"pixel" {
864	foreach { x y value tag } [lrange $args 2 end] break
865	}
866	}
867	}
868	"vector" {
869	set option [lindex $args 1]
870	switch -- $option {
871	"world" {
872	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
873	}
874	"pixel" {
875	foreach { x y vx vy vz tag } [lrange $args 2 end] break
876	}
877	}
878	}
879	"names" {
880	foreach { name } [lindex $args 1] {
881	#puts stderr "Dataset: $name"
882	}
883	}
884	default {
885	error "unknown dataset option \"$option\" from server"
886	}
887	}
888	}
889
890	# ----------------------------------------------------------------------
891	# USAGE: Rebuild
892	#
893	# Called automatically whenever something changes that affects the
894	# data in the widget. Clears any existing data and rebuilds the
895	# widget to display new data.
896	# ----------------------------------------------------------------------
897	itcl::body Rappture::VtkImageViewer::Rebuild {} {
898	set w [winfo width $itk_component(view)]
899	set h [winfo height $itk_component(view)]
900	if { $w < 2 \|\| $h < 2 } {
901	$_dispatcher event -idle !rebuild
902	return
903	}
904
905	# Turn on buffering of commands to the server. We don't want to
906	# be preempted by a server disconnect/reconnect (which automatically
907	# generates a new call to Rebuild).
908	StartBufferingCommands
909
910	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
911	set _width $w
912	set _height $h
913	$_arcball resize $w $h
914	DoResize
915	if { $_settings(stretchToFit) } {
916	AdjustSetting stretchToFit
917	}
918	}
919	if { $_reset } {
920	#
921	# Reset the camera and other view parameters
922	#
923	InitSettings view3D background
924
925	# Let's see how this goes. I think it's preferable to overloading the
926	# axis title with the exponent.
927	SendCmd "axis exp 0 0 0 1"
928
929	SendCmd "axis lrot z 90"
930	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
931	$_arcball quaternion $q
932	if {$_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	puts $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" [$dataobj hints toolName]
969	lappend info "tool_version" [$dataobj hints toolRevision]
970	lappend info "tool_title" [$dataobj hints toolTitle]
971	lappend info "dataset_label" [$dataobj hints label]
972	lappend info "dataset_size" $length
973	lappend info "dataset_tag" $tag
974	SendCmd [list "clientinfo" $info]
975	}
976	SendCmd "dataset add $tag data follows $length"
977	append _outbuf $bytes
978	set _datasets($tag) 1
979	SetObjectStyle $dataobj $comp
980	}
981	lappend _obj2datasets($dataobj) $tag
982	if { [info exists _obj2ovride($dataobj-raise)] } {
983	# Setting dataset visible enables outline
984	# and image
985	SendCmd "dataset visible 1 $tag"
986	}
987	}
988	}
989	if { $_first != "" } {
990	$itk_component(field) choices delete 0 end
991	$itk_component(fieldmenu) delete 0 end
992	array unset _fields
993	set _curFldName ""
994	foreach cname [$_first components] {
995	foreach fname [$_first fieldnames $cname] {
996	if { [info exists _fields($fname)] } {
997	continue
998	}
999	foreach { label units components } \
1000	[$_first fieldinfo $fname] break
1001	$itk_component(field) choices insert end "$fname" "$label"
1002	$itk_component(fieldmenu) add radiobutton -label "$label" \
1003	-value $label -variable [itcl::scope _curFldLabel] \
1004	-selectcolor red \
1005	-activebackground $itk_option(-plotbackground) \
1006	-activeforeground $itk_option(-plotforeground) \
1007	-font "Arial 8" \
1008	-command [itcl::code $this Combo invoke]
1009	set _fields($fname) [list $label $units $components]
1010	if { $_curFldName == "" } {
1011	set _curFldName $fname
1012	set _curFldLabel $label
1013	}
1014	}
1015	}
1016	$itk_component(field) value $_curFldLabel
1017	}
1018	InitSettings stretchToFit outline
1019
1020	if { $_reset } {
1021	SendCmd "axis tickpos outside"
1022	foreach axis { x y z } {
1023	SendCmd "axis lformat $axis %g"
1024	}
1025
1026	foreach axis { x y z } {
1027	set label [$_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	set units [lindex $_fields($_curFldName) 1]
1036	} else {
1037	set units [$_first hints ${axis}units]
1038	}
1039	if { $units != "" } {
1040	# May be a space in the axis units.
1041	SendCmd [list axis units $axis $units]
1042	}
1043	}
1044	#
1045	# Reset the camera and other view parameters
1046	#
1047	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1048	$_arcball quaternion $q
1049	if {$_settings(view3D) } {
1050	if { $_view(ortho)} {
1051	SendCmd "camera mode ortho"
1052	} else {
1053	SendCmd "camera mode persp"
1054	}
1055	DoRotate
1056	SendCmd "camera reset"
1057	}
1058	PanCamera
1059	InitSettings axisXGrid axisYGrid axisZGrid \
1060	axisVisible axisLabels field view3D
1061	if { [array size _fields] < 2 } {
1062	blt::table forget $itk_component(field) $itk_component(field_l)
1063	}
1064	RequestLegend
1065	set _reset 0
1066	}
1067	global readyForNextFrame
1068	set readyForNextFrame 0; # Don't advance to the next frame
1069
1070	# Actually write the commands to the server socket. If it fails, we don't
1071	# care. We're finished here.
1072	blt::busy hold $itk_component(hull)
1073	StopBufferingCommands
1074	blt::busy release $itk_component(hull)
1075	}
1076
1077	# ----------------------------------------------------------------------
1078	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1079	#
1080	# Returns a list of server IDs for the current datasets being displayed. This
1081	# is normally a single ID, but it might be a list of IDs if the current data
1082	# object has multiple components.
1083	# ----------------------------------------------------------------------
1084	itcl::body Rappture::VtkImageViewer::CurrentDatasets {args} {
1085	set flag [lindex $args 0]
1086	switch -- $flag {
1087	"-all" {
1088	if { [llength $args] > 1 } {
1089	error "CurrentDatasets: can't specify dataobj after \"-all\""
1090	}
1091	set dlist [get -objects]
1092	}
1093	"-visible" {
1094	if { [llength $args] > 1 } {
1095	set dlist {}
1096	set args [lrange $args 1 end]
1097	foreach dataobj $args {
1098	if { [info exists _obj2ovride($dataobj-raise)] } {
1099	lappend dlist $dataobj
1100	}
1101	}
1102	} else {
1103	set dlist [get -visible]
1104	}
1105	}
1106	default {
1107	set dlist $args
1108	}
1109	}
1110	set rlist ""
1111	foreach dataobj $dlist {
1112	foreach comp [$dataobj components] {
1113	set tag $dataobj-$comp
1114	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1115	lappend rlist $tag
1116	}
1117	}
1118	}
1119	return $rlist
1120	}
1121
1122	# ----------------------------------------------------------------------
1123	# USAGE: Zoom in
1124	# USAGE: Zoom out
1125	# USAGE: Zoom reset
1126	#
1127	# Called automatically when the user clicks on one of the zoom
1128	# controls for this widget. Changes the zoom for the current view.
1129	# ----------------------------------------------------------------------
1130	itcl::body Rappture::VtkImageViewer::Zoom {option} {
1131	switch -- $option {
1132	"in" {
1133	set _view(zoom) [expr {$_view(zoom)*1.25}]
1134	SendCmd "camera zoom $_view(zoom)"
1135	}
1136	"out" {
1137	set _view(zoom) [expr {$_view(zoom)*0.8}]
1138	SendCmd "camera zoom $_view(zoom)"
1139	}
1140	"reset" {
1141	array set _view {
1142	qw 0.36
1143	qx 0.25
1144	qy 0.50
1145	qz 0.70
1146	zoom 1.0
1147	xpan 0
1148	ypan 0
1149	}
1150	if { $_first != "" } {
1151	set location [$_first hints camera]
1152	if { $location != "" } {
1153	array set _view $location
1154	}
1155	}
1156	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1157	$_arcball quaternion $q
1158	if {$_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(axisLabels)
1320	SendCmd "axis labels all $bool"
1321	}
1322	"axisMinorTicks" {
1323	set bool $_settings(axisMinorTicks)
1324	foreach axis { x y z } {
1325	SendCmd "axis minticks ${axis} $bool"
1326	}
1327	}
1328	"axisVisible" {
1329	set bool $_settings(axisVisible)
1330	SendCmd "axis visible all $bool"
1331	}
1332	"axisXGrid" - "axisYGrid" - "axisZGrid" {
1333	set axis [string tolower [string range $what 4 4]]
1334	set bool $_settings($what)
1335	SendCmd "axis grid $axis $bool"
1336	}
1337	"background" {
1338	set bg [$itk_component(background) value]
1339	array set fgcolors {
1340	"black" "white"
1341	"white" "black"
1342	"grey" "black"
1343	}
1344	set fg $fgcolors($bg)
1345	configure -plotbackground $bg -plotforeground $fg
1346	$itk_component(view) delete "legend"
1347	SendCmd "screen bgcolor [Color2RGB $bg]"
1348	SendCmd "outline color [Color2RGB $fg]"
1349	SendCmd "axis color all [Color2RGB $fg]"
1350	DrawLegend
1351	}
1352	"backingColor" {
1353	set color [$itk_component(backingcolor) value]
1354	if { $color == "none" } {
1355	if { $_settings(backingVisible) } {
1356	SendCmd "image backing 0"
1357	set _settings(backingVisible) 0
1358	}
1359	} else {
1360	if { !$_settings(backingVisible) } {
1361	SendCmd "image backing 1"
1362	set _settings(backingVisible) 1
1363	}
1364	SendCmd "image color [Color2RGB $color]"
1365	}
1366	}
1367	"backingVisible" {
1368	set bool $_settings($what)
1369	SendCmd "image backing $bool"
1370	}
1371	"colormap" {
1372	set _changed(colormap) 1
1373	StartBufferingCommands
1374	set color [$itk_component(colormap) value]
1375	set _settings(colormap) $color
1376	SetCurrentColormap $color
1377	if {$_settings(colormapDiscrete)} {
1378	SendCmd "colormap res $_settings(numColors) $color"
1379	}
1380	StopBufferingCommands
1381	EventuallyRequestLegend
1382	}
1383	"colormapDiscrete" {
1384	set bool $_settings($what)
1385	StartBufferingCommands
1386	if {$bool} {
1387	SendCmd "colormap res $_settings(numColors)"
1388	} else {
1389	SendCmd "colormap res default"
1390	}
1391	StopBufferingCommands
1392	EventuallyRequestLegend
1393	}
1394	"field" {
1395	set label [$itk_component(field) value]
1396	set fname [$itk_component(field) translate $label]
1397	set _settings(field) $fname
1398	if { [info exists _fields($fname)] } {
1399	foreach { label units components } $_fields($fname) break
1400	if { $components > 1 } {
1401	set _colorMode vmag
1402	} else {
1403	set _colorMode scalar
1404	}
1405	set _curFldName $fname
1406	set _curFldLabel $label
1407	} else {
1408	puts stderr "unknown field \"$fname\""
1409	return
1410	}
1411
1412	# Get the new limits because the field changed.
1413	SendCmd "dataset scalar $_curFldName"
1414	#SendCmd "image colormode scalar $_curFldName"
1415	SendCmd "camera reset"
1416	DrawLegend
1417	}
1418	"view3D" {
1419	set bool $_settings(view3D)
1420	set c $itk_component(view)
1421	StartBufferingCommands
1422	# Fix image scale: 0 for contours, 1 for images.
1423	if { $bool } {
1424	set _settings(opacity) $_settings(saveOpacity)
1425	} else {
1426	set _settings(opacity) 100
1427	}
1428	AdjustSetting opacity
1429	if { $bool } {
1430	$itk_component(opacity) configure -state normal
1431	$itk_component(opacity_l) configure -state normal
1432	if {$_view(ortho)} {
1433	SendCmd "camera mode ortho"
1434	} else {
1435	SendCmd "camera mode persp"
1436	}
1437	SendCmd "camera aspect native"
1438	} else {
1439	$itk_component(opacity) configure -state disabled
1440	$itk_component(opacity_l) configure -state disabled
1441	SendCmd "camera mode image"
1442	if {$_settings(stretchToFit)} {
1443	SendCmd "camera aspect window"
1444	}
1445	}
1446	if { $bool } {
1447	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1448	$_arcball quaternion $q
1449	SendCmd "camera orient $q"
1450	} else {
1451	bind $c <ButtonPress-1> {}
1452	bind $c <B1-Motion> {}
1453	bind $c <ButtonRelease-1> {}
1454	}
1455	SendCmd "camera reset"
1456	# Fix the mouse bindings for rotation/panning and the
1457	# camera mode. Ideally we'd create a bindtag for these.
1458	if { $bool } {
1459	# Bindings for rotation via mouse
1460	bind $c <ButtonPress-1> \
1461	[itcl::code $this Rotate click %x %y]
1462	bind $c <B1-Motion> \
1463	[itcl::code $this Rotate drag %x %y]
1464	bind $c <ButtonRelease-1> \
1465	[itcl::code $this Rotate release %x %y]
1466	}
1467	StopBufferingCommands
1468	}
1469	"window" {
1470	set val $_settings(window)
1471	SendCmd "image window $val"
1472	}
1473	"level" {
1474	set val $_settings(level)
1475	SendCmd "image level $val"
1476	}
1477	"legendVisible" {
1478	if { !$_settings($what) } {
1479	$itk_component(view) delete legend
1480	}
1481	DrawLegend
1482	}
1483	"opacity" {
1484	set _changed(opacity) 1
1485	if { $_settings(view3D) } {
1486	set _settings(saveOpacity) $_settings(opacity)
1487	set val $_settings(opacity)
1488	set sval [expr { 0.01 * double($val) }]
1489	SendCmd "image opacity $sval"
1490	} else {
1491	SendCmd "image opacity 1"
1492	}
1493	}
1494	"outline" {
1495	set bool $_settings(outline)
1496	SendCmd "outline visible $bool"
1497	}
1498	"stretchToFit" {
1499	set bool $_settings($what)
1500	if { $bool } {
1501	if { $_settings(view3D) } {
1502	SendCmd "camera aspect native"
1503	} else {
1504	SendCmd "camera aspect window"
1505	}
1506	} else {
1507	SendCmd "camera aspect native"
1508	}
1509	}
1510	default {
1511	error "don't know how to fix $what"
1512	}
1513	}
1514	}
1515
1516	#
1517	# RequestLegend --
1518	#
1519	# Request a new legend from the server. The size of the legend
1520	# is determined from the height of the canvas.
1521	#
1522	# This should be called when
1523	# 1. A new current colormap is set.
1524	# 2. Window is resized.
1525	# 3. The limits of the data have changed. (Just need a redraw).
1526	# 4. Number of isolines have changed. (Just need a redraw).
1527	# 5. Legend becomes visible (Just need a redraw).
1528	#
1529	itcl::body Rappture::VtkImageViewer::RequestLegend {} {
1530	set _legendPending 0
1531	set font "Arial 8"
1532	set w 12
1533	set lineht [font metrics $font -linespace]
1534	# color ramp height = (canvas height) - (min and max value lines) - 2
1535	set h [expr {$_height - 2 * ($lineht + 2)}]
1536	set _legendHeight $h
1537
1538	set fname $_curFldName
1539	if { [string match "component*" $fname] } {
1540	set title ""
1541	} else {
1542	if { [info exists _fields($fname)] } {
1543	foreach { title units } $_fields($fname) break
1544	if { $units != "" } {
1545	set title [format "%s (%s)" $title $units]
1546	}
1547	} else {
1548	set title $fname
1549	}
1550	}
1551	# If there's a title too, substract one more line
1552	if { $title != "" } {
1553	incr h -$lineht
1554	}
1555	if { $h < 1 } {
1556	return
1557	}
1558	# Set the legend on the first image dataset.
1559	if { $_currentColormap != "" && $_currentColormap != "none" } {
1560	SendCmd "legend $_currentColormap scalar $_curFldName {} $w $h 0"
1561	}
1562	}
1563
1564	#
1565	# SetCurrentColormap --
1566	#
1567	itcl::body Rappture::VtkImageViewer::SetCurrentColormap { name } {
1568	# Keep track of the colormaps that we build.
1569	if { $name != "none" && ![info exists _colormaps($name)] } {
1570	BuildColormap $name
1571	set _colormaps($name) 1
1572	}
1573	set _currentColormap $name
1574	SendCmd "image colormap $_currentColormap"
1575	}
1576
1577
1578	#
1579	# BuildColormap --
1580	#
1581	# Build the designated colormap on the server.
1582	#
1583	itcl::body Rappture::VtkImageViewer::BuildColormap { name } {
1584	set cmap [ColorsToColormap $name]
1585	if { [llength $cmap] == 0 } {
1586	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
1587	}
1588	set wmap "0.0 1.0 1.0 1.0"
1589	SendCmd "colormap add $name { $cmap } { $wmap }"
1590	}
1591
1592	# ----------------------------------------------------------------------
1593	# CONFIGURATION OPTION: -mode
1594	# ----------------------------------------------------------------------
1595	itcl::configbody Rappture::VtkImageViewer::mode {
1596	switch -- $itk_option(-mode) {
1597	"volume" {
1598	set _settings(view3D) 1
1599	}
1600	"vtkimage" {
1601	set _settings(view3D) 0
1602	}
1603	default {
1604	error "unknown mode settings \"$itk_option(-mode)\""
1605	}
1606	}
1607	if { !$_reset } {
1608	AdjustSetting view3D
1609	}
1610	}
1611
1612	# ----------------------------------------------------------------------
1613	# CONFIGURATION OPTION: -plotbackground
1614	# ----------------------------------------------------------------------
1615	itcl::configbody Rappture::VtkImageViewer::plotbackground {
1616	if { [isconnected] } {
1617	set rgb [Color2RGB $itk_option(-plotbackground)]
1618	if { !$_reset } {
1619	SendCmd "screen bgcolor $rgb"
1620	}
1621	$itk_component(view) configure -background $itk_option(-plotbackground)
1622	}
1623	}
1624
1625	# ----------------------------------------------------------------------
1626	# CONFIGURATION OPTION: -plotforeground
1627	# ----------------------------------------------------------------------
1628	itcl::configbody Rappture::VtkImageViewer::plotforeground {
1629	if { [isconnected] } {
1630	set rgb [Color2RGB $itk_option(-plotforeground)]
1631	if { !$_reset } {
1632	SendCmd "outline color $rgb"
1633	SendCmd "axis color all $rgb"
1634	}
1635	}
1636	}
1637
1638	itcl::body Rappture::VtkImageViewer::limits3 { dataobj } {
1639	lappend limits x [$dataobj limits x]
1640	lappend limits y [$dataobj limits y]
1641	if { [catch { $dataobj limits $_curFldName } vlim] != 0 } {
1642	set vlim [$dataobj limits v]
1643	}
1644	lappend limits v $vlim
1645	return $limits
1646	}
1647
1648	itcl::body Rappture::VtkImageViewer::BuildImageTab {} {
1649
1650	set fg [option get $itk_component(hull) font Font]
1651	#set bfg [option get $itk_component(hull) boldFont Font]
1652
1653	set inner [$itk_component(main) insert end \
1654	-title "Image Settings" \
1655	-icon [Rappture::icon contour2]]
1656	$inner configure -borderwidth 4
1657
1658	checkbutton $inner.legend \
1659	-text "Legend" \
1660	-variable [itcl::scope _settings(legendVisible)] \
1661	-command [itcl::code $this AdjustSetting legendVisible] \
1662	-font "Arial 9"
1663
1664	checkbutton $inner.outline \
1665	-text "Outline" \
1666	-variable [itcl::scope _settings(outline)] \
1667	-command [itcl::code $this AdjustSetting outline] \
1668	-font "Arial 9"
1669
1670	checkbutton $inner.backing \
1671	-text "Backing" \
1672	-variable [itcl::scope _settings(backingVisible)] \
1673	-command [itcl::code $this AdjustSetting backingVisible] \
1674	-font "Arial 9"
1675
1676	checkbutton $inner.stretch \
1677	-text "Stretch to fit" \
1678	-variable [itcl::scope _settings(stretchToFit)] \
1679	-command [itcl::code $this AdjustSetting stretchToFit] \
1680	-font "Arial 9"
1681
1682	checkbutton $inner.colormapDiscrete \
1683	-text "Discrete Colormap" \
1684	-variable [itcl::scope _settings(colormapDiscrete)] \
1685	-command [itcl::code $this AdjustSetting colormapDiscrete] \
1686	-font "Arial 9"
1687
1688	itk_component add field_l {
1689	label $inner.field_l -text "Field" -font "Arial 9"
1690	} {
1691	ignore -font
1692	}
1693	itk_component add field {
1694	Rappture::Combobox $inner.field -width 10 -editable no
1695	}
1696	bind $inner.field <<Value>> \
1697	[itcl::code $this AdjustSetting field]
1698
1699	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1700	itk_component add colormap {
1701	Rappture::Combobox $inner.colormap -width 10 -editable no
1702	}
1703	$inner.colormap choices insert end [GetColormapList -includeNone]
1704
1705	$itk_component(colormap) value "BCGYR"
1706	bind $inner.colormap <<Value>> \
1707	[itcl::code $this AdjustSetting colormap]
1708
1709	label $inner.backingcolor_l -text "Backing Color" -font "Arial 9"
1710	itk_component add backingcolor {
1711	Rappture::Combobox $inner.backingcolor -width 10 -editable no
1712	}
1713	$inner.backingcolor choices insert end \
1714	"black" "black" \
1715	"blue" "blue" \
1716	"cyan" "cyan" \
1717	"green" "green" \
1718	"grey" "grey" \
1719	"magenta" "magenta" \
1720	"orange" "orange" \
1721	"red" "red" \
1722	"white" "white" \
1723	"none" "none"
1724
1725	$itk_component(backingcolor) value "white"
1726	bind $inner.backingcolor <<Value>> \
1727	[itcl::code $this AdjustSetting backingColor]
1728
1729	label $inner.background_l -text "Background Color" -font "Arial 9"
1730	itk_component add background {
1731	Rappture::Combobox $inner.background -width 10 -editable no
1732	}
1733	$inner.background choices insert end \
1734	"black" "black" \
1735	"white" "white" \
1736	"grey" "grey"
1737
1738	$itk_component(background) value "white"
1739	bind $inner.background <<Value>> [itcl::code $this AdjustSetting background]
1740
1741	itk_component add opacity_l {
1742	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1743	} {
1744	ignore -font
1745	}
1746	itk_component add opacity {
1747	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1748	-variable [itcl::scope _settings(opacity)] \
1749	-showvalue off \
1750	-command [itcl::code $this AdjustSetting opacity]
1751	}
1752
1753	itk_component add window_l {
1754	label $inner.window_l -text "Window" -font "Arial 9"
1755	} {
1756	ignore -font
1757	}
1758	itk_component add window {
1759	::scale $inner.window -from 0 -to 255 -orient horizontal \
1760	-variable [itcl::scope _settings(window)] \
1761	-showvalue off \
1762	-command [itcl::code $this AdjustSetting window]
1763	}
1764	itk_component add level_l {
1765	label $inner.level_l -text "Level" -font "Arial 9"
1766	} {
1767	ignore -font
1768	}
1769	itk_component add level {
1770	::scale $inner.level -from 0 -to 255 -orient horizontal \
1771	-variable [itcl::scope _settings(level)] \
1772	-showvalue off \
1773	-command [itcl::code $this AdjustSetting level]
1774	}
1775
1776	frame $inner.separator1 -height 2 -relief sunken -bd 1
1777	frame $inner.separator2 -height 2 -relief sunken -bd 1
1778
1779	blt::table $inner \
1780	0,0 $inner.field_l -anchor w -pady 2 \
1781	0,1 $inner.field -anchor w -pady 2 -fill x \
1782	1,0 $inner.colormap_l -anchor w -pady 2 \
1783	1,1 $inner.colormap -anchor w -pady 2 -fill x \
1784	2,0 $inner.backingcolor_l -anchor w -pady 2 \
1785	2,1 $inner.backingcolor -anchor w -pady 2 -fill x \
1786	3,0 $inner.background_l -anchor w -pady 2 \
1787	3,1 $inner.background -anchor w -pady 2 -fill x \
1788	4,0 $inner.backing -anchor w -pady 2 -cspan 2 \
1789	5,0 $inner.stretch -anchor w -pady 2 -cspan 2 \
1790	7,0 $inner.legend -anchor w -pady 2 -cspan 2 \
1791	8,0 $inner.colormapDiscrete -anchor w -pady 2 -cspan 2 \
1792	11,0 $inner.separator1 -padx 2 -fill x -cspan 2 \
1793	12,0 $inner.outline -anchor w -pady 2 -cspan 2 \
1794	13,0 $inner.separator2 -padx 2 -fill x -cspan 2 \
1795	15,0 $inner.opacity_l -anchor w -pady 2 \
1796	15,1 $inner.opacity -fill x -pady 2 \
1797	16,0 $inner.window_l -anchor w -pady 2 \
1798	16,1 $inner.window -fill x -pady 2 \
1799	17,0 $inner.level_l -anchor w -pady 2 \
1800	17,1 $inner.level -fill x -pady 2
1801
1802	blt::table configure $inner r* c* -resize none
1803	blt::table configure $inner r19 c1 -resize expand
1804	}
1805
1806	itcl::body Rappture::VtkImageViewer::BuildAxisTab {} {
1807
1808	set fg [option get $itk_component(hull) font Font]
1809	#set bfg [option get $itk_component(hull) boldFont Font]
1810
1811	set inner [$itk_component(main) insert end \
1812	-title "Axis Settings" \
1813	-icon [Rappture::icon axis2]]
1814	$inner configure -borderwidth 4
1815
1816	checkbutton $inner.visible \
1817	-text "Axes" \
1818	-variable [itcl::scope _settings(axisVisible)] \
1819	-command [itcl::code $this AdjustSetting axisVisible] \
1820	-font "Arial 9"
1821	checkbutton $inner.labels \
1822	-text "Axis Labels" \
1823	-variable [itcl::scope _settings(axisLabels)] \
1824	-command [itcl::code $this AdjustSetting axisLabels] \
1825	-font "Arial 9"
1826	label $inner.grid_l -text "Grid" -font "Arial 9"
1827	checkbutton $inner.xgrid \
1828	-text "X" \
1829	-variable [itcl::scope _settings(axisXGrid)] \
1830	-command [itcl::code $this AdjustSetting axisXGrid] \
1831	-font "Arial 9"
1832	checkbutton $inner.ygrid \
1833	-text "Y" \
1834	-variable [itcl::scope _settings(axisYGrid)] \
1835	-command [itcl::code $this AdjustSetting axisYGrid] \
1836	-font "Arial 9"
1837	checkbutton $inner.zgrid \
1838	-text "Z" \
1839	-variable [itcl::scope _settings(axisZGrid)] \
1840	-command [itcl::code $this AdjustSetting axisZGrid] \
1841	-font "Arial 9"
1842	checkbutton $inner.minorticks \
1843	-text "Minor Ticks" \
1844	-variable [itcl::scope _settings(axisMinorTicks)] \
1845	-command [itcl::code $this AdjustSetting axisMinorTicks] \
1846	-font "Arial 9"
1847
1848
1849	label $inner.mode_l -text "Mode" -font "Arial 9"
1850
1851	itk_component add axisflymode {
1852	Rappture::Combobox $inner.mode -width 10 -editable no
1853	}
1854	$inner.mode choices insert end \
1855	"static_triad" "static" \
1856	"closest_triad" "closest" \
1857	"furthest_triad" "farthest" \
1858	"outer_edges" "outer"
1859	$itk_component(axisflymode) value "static"
1860	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting axisFlymode]
1861
1862	blt::table $inner \
1863	0,0 $inner.visible -anchor w -cspan 4 \
1864	1,0 $inner.labels -anchor w -cspan 4 \
1865	2,0 $inner.minorticks -anchor w -cspan 4 \
1866	4,0 $inner.grid_l -anchor w \
1867	4,1 $inner.xgrid -anchor w \
1868	4,2 $inner.ygrid -anchor w \
1869	4,3 $inner.zgrid -anchor w \
1870	5,0 $inner.mode_l -anchor w -padx { 2 0 } \
1871	5,1 $inner.mode -fill x -cspan 3
1872
1873	blt::table configure $inner r* c* -resize none
1874	blt::table configure $inner r7 c6 -resize expand
1875	blt::table configure $inner r3 -height 0.125i
1876	}
1877
1878
1879	itcl::body Rappture::VtkImageViewer::BuildCameraTab {} {
1880	set inner [$itk_component(main) insert end \
1881	-title "Camera Settings" \
1882	-icon [Rappture::icon camera]]
1883	$inner configure -borderwidth 4
1884
1885	label $inner.view_l -text "view" -font "Arial 9"
1886	set f [frame $inner.view]
1887	foreach side { front back left right top bottom } {
1888	button $f.$side -image [Rappture::icon view$side] \
1889	-command [itcl::code $this SetOrientation $side]
1890	Rappture::Tooltip::for $f.$side "Change the view to $side"
1891	pack $f.$side -side left
1892	}
1893
1894	blt::table $inner \
1895	0,0 $inner.view_l -anchor e -pady 2 \
1896	0,1 $inner.view -anchor w -pady 2
1897
1898	set labels { qx qy qz qw xpan ypan zoom }
1899	set row 1
1900	foreach tag $labels {
1901	label $inner.${tag}label -text $tag -font "Arial 9"
1902	entry $inner.${tag} -font "Arial 9" -bg white \
1903	-textvariable [itcl::scope _view($tag)]
1904	bind $inner.${tag} <Return> \
1905	[itcl::code $this camera set ${tag}]
1906	bind $inner.${tag} <KP_Enter> \
1907	[itcl::code $this camera set ${tag}]
1908	blt::table $inner \
1909	$row,0 $inner.${tag}label -anchor e -pady 2 \
1910	$row,1 $inner.${tag} -anchor w -pady 2
1911	blt::table configure $inner r$row -resize none
1912	incr row
1913	}
1914	checkbutton $inner.ortho \
1915	-text "Orthographic Projection" \
1916	-variable [itcl::scope _view(ortho)] \
1917	-command [itcl::code $this camera set ortho] \
1918	-font "Arial 9"
1919	blt::table $inner \
1920	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1921	blt::table configure $inner r$row -resize none
1922	incr row
1923
1924	blt::table configure $inner c* r* -resize none
1925	blt::table configure $inner c2 -resize expand
1926	blt::table configure $inner r$row -resize expand
1927	}
1928
1929	#
1930	# camera --
1931	#
1932	itcl::body Rappture::VtkImageViewer::camera {option args} {
1933	switch -- $option {
1934	"show" {
1935	puts [array get _view]
1936	}
1937	"set" {
1938	set who [lindex $args 0]
1939	set x $_view($who)
1940	set code [catch { string is double $x } result]
1941	if { $code != 0 \|\| !$result } {
1942	return
1943	}
1944	switch -- $who {
1945	"ortho" {
1946	if {$_view(ortho)} {
1947	SendCmd "camera mode ortho"
1948	} else {
1949	SendCmd "camera mode persp"
1950	}
1951	}
1952	"xpan" - "ypan" {
1953	PanCamera
1954	}
1955	"qx" - "qy" - "qz" - "qw" {
1956	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1957	$_arcball quaternion $q
1958	EventuallyRotate $q
1959	}
1960	"zoom" {
1961	SendCmd "camera zoom $_view(zoom)"
1962	}
1963	}
1964	}
1965	}
1966	}
1967
1968	itcl::body Rappture::VtkImageViewer::GetVtkData { args } {
1969	set bytes ""
1970	foreach dataobj [get] {
1971	foreach comp [$dataobj components] {
1972	set tag $dataobj-$comp
1973	set contents [$dataobj vtkdata $comp]
1974	append bytes "$contents\n"
1975	}
1976	}
1977	return [list .vtk $bytes]
1978	}
1979
1980	itcl::body Rappture::VtkImageViewer::GetImage { args } {
1981	if { [image width $_image(download)] > 0 &&
1982	[image height $_image(download)] > 0 } {
1983	set bytes [$_image(download) data -format "jpeg -quality 100"]
1984	set bytes [Rappture::encoding::decode -as b64 $bytes]
1985	return [list .jpg $bytes]
1986	}
1987	return ""
1988	}
1989
1990	itcl::body Rappture::VtkImageViewer::BuildDownloadPopup { popup command } {
1991	Rappture::Balloon $popup \
1992	-title "[Rappture::filexfer::label downloadWord] as..."
1993	set inner [$popup component inner]
1994	label $inner.summary -text "" -anchor w
1995	radiobutton $inner.vtk_button -text "VTK data file" \
1996	-variable [itcl::scope _downloadPopup(format)] \
1997	-font "Arial 9 " \
1998	-value vtk
1999	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
2000	radiobutton $inner.image_button -text "Image File" \
2001	-variable [itcl::scope _downloadPopup(format)] \
2002	-font "Arial 9 " \
2003	-value image
2004	Rappture::Tooltip::for $inner.image_button \
2005	"Save as digital image."
2006
2007	button $inner.ok -text "Save" \
2008	-highlightthickness 0 -pady 2 -padx 3 \
2009	-command $command \
2010	-compound left \
2011	-image [Rappture::icon download]
2012
2013	button $inner.cancel -text "Cancel" \
2014	-highlightthickness 0 -pady 2 -padx 3 \
2015	-command [list $popup deactivate] \
2016	-compound left \
2017	-image [Rappture::icon cancel]
2018
2019	blt::table $inner \
2020	0,0 $inner.summary -cspan 2 \
2021	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2022	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2023	4,1 $inner.cancel -width .9i -fill y \
2024	4,0 $inner.ok -padx 2 -width .9i -fill y
2025	blt::table configure $inner r3 -height 4
2026	blt::table configure $inner r4 -pady 4
2027	raise $inner.image_button
2028	$inner.vtk_button invoke
2029	return $inner
2030	}
2031
2032	#
2033	# SetObjectStyle --
2034	#
2035	# Set the style of the image/contour object. This gets calls
2036	# for each dataset once as it is loaded. It can overridden by
2037	# the user controls.
2038	#
2039	#
2040	itcl::body Rappture::VtkImageViewer::SetObjectStyle { dataobj comp } {
2041	# Parse style string.
2042	set tag $dataobj-$comp
2043	array set style {
2044	-color none
2045	-opacity 100
2046	}
2047	set stylelist [$dataobj style $comp]
2048	if { $stylelist != "" } {
2049	array set style $stylelist
2050	}
2051	# This is too complicated. We want to set the colormap, number of
2052	# isolines and opacity for the dataset. They can be the default values,
2053	# the style hints loaded with the dataset, or set by user controls. As
2054	# datasets get loaded, they first use the defaults that are overidden
2055	# by the style hints. If the user changes the global controls, then that
2056	# overrides everything else. I don't know what it means when global
2057	# controls are specified as style hints by each dataset. It complicates
2058	# the code to handle aberrant cases.
2059
2060	if { $_changed(opacity) } {
2061	set style(-opacity) $_settings(opacity)
2062	}
2063	if { $_changed(colormap) } {
2064	set style(-color) $_settings(colormap)
2065	}
2066	if { $_currentColormap == "" } {
2067	$itk_component(colormap) value $style(-color)
2068	}
2069	if { [info exists style(-stretchtofit)] } {
2070	set _settings(stretchToFit) $style(-stretchtofit)
2071	AdjustSetting stretchToFit
2072	}
2073	set _currentOpacity $style(-opacity)
2074	SendCmd "outline add $tag"
2075	SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
2076	SendCmd "outline visible $_settings(outline) $tag"
2077	SendCmd "image add $tag"
2078	SetCurrentColormap $style(-color)
2079	set color [$itk_component(backingcolor) value]
2080	SendCmd "image color [Color2RGB $color] $tag"
2081	}
2082
2083	itcl::body Rappture::VtkImageViewer::IsValidObject { dataobj } {
2084	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2085	return 0
2086	}
2087	return 1
2088	}
2089
2090	# ----------------------------------------------------------------------
2091	# USAGE: ReceiveLegend <colormap> <title> <min> <max> <size>
2092	#
2093	# Invoked automatically whenever the "legend" command comes in from
2094	# the rendering server. Indicates that binary image data with the
2095	# specified <size> will follow.
2096	# ----------------------------------------------------------------------
2097	itcl::body Rappture::VtkImageViewer::ReceiveLegend { colormap title min max size } {
2098	#puts stderr "ReceiveLegend colormap=$colormap title=$title range=$min,$max size=$size"
2099	if { [isconnected] } {
2100	set bytes [ReceiveBytes $size]
2101	if { ![info exists _image(legend)] } {
2102	set _image(legend) [image create photo]
2103	}
2104	$_image(legend) configure -data $bytes
2105	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2106	if { [catch {DrawLegend} errs] != 0 } {
2107	global errorInfo
2108	puts stderr "errs=$errs errorInfo=$errorInfo"
2109	}
2110	}
2111	}
2112
2113	#
2114	# DrawLegend --
2115	#
2116	# Draws the legend in the own canvas on the right side of the plot area.
2117	#
2118	itcl::body Rappture::VtkImageViewer::DrawLegend {} {
2119	set fname $_curFldName
2120	set c $itk_component(view)
2121	set w [winfo width $c]
2122	set h [winfo height $c]
2123	set font "Arial 8"
2124	set lineht [font metrics $font -linespace]
2125
2126	if { [string match "component*" $fname] } {
2127	set title ""
2128	} else {
2129	if { [info exists _fields($fname)] } {
2130	foreach { title units } $_fields($fname) break
2131	if { $units != "" } {
2132	set title [format "%s (%s)" $title $units]
2133	}
2134	} else {
2135	set title $fname
2136	}
2137	}
2138	set x [expr $w - 2]
2139	if { !$_settings(legendVisible) } {
2140	$c delete legend
2141	return
2142	}
2143	if { [$c find withtag "legend"] == "" } {
2144	set y 2
2145	# If there's a legend title, create a text item for the title.
2146	$c create text $x $y \
2147	-anchor ne \
2148	-fill $itk_option(-plotforeground) -tags "title legend" \
2149	-font $font
2150	if { $title != "" } {
2151	incr y $lineht
2152	}
2153	$c create text $x $y \
2154	-anchor ne \
2155	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2156	-font $font
2157	incr y $lineht
2158	$c create image $x $y \
2159	-anchor ne \
2160	-image $_image(legend) -tags "colormap legend"
2161	$c create rectangle $x $y 1 1 \
2162	-fill "" -outline "" -tags "sensor legend"
2163	$c create text $x [expr {$h-2}] \
2164	-anchor se \
2165	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2166	-font $font
2167	$c bind sensor <Enter> [itcl::code $this EnterLegend %x %y]
2168	$c bind sensor <Leave> [itcl::code $this LeaveLegend]
2169	$c bind sensor <Motion> [itcl::code $this MotionLegend %x %y]
2170	}
2171
2172	set x2 $x
2173	set iw [image width $_image(legend)]
2174	set ih [image height $_image(legend)]
2175	set x1 [expr $x2 - ($iw*12)/10]
2176
2177	$c bind title <ButtonPress> [itcl::code $this Combo post]
2178	$c bind title <Enter> [itcl::code $this Combo activate]
2179	$c bind title <Leave> [itcl::code $this Combo deactivate]
2180	# Reset the item coordinates according the current size of the plot.
2181	if { [info exists _limits($_curFldName)] } {
2182	foreach { vmin vmax } $_limits($_curFldName) break
2183	$c itemconfigure vmin -text [format %g $vmin]
2184	$c itemconfigure vmax -text [format %g $vmax]
2185	}
2186	set y 2
2187	# If there's a legend title, move the title to the correct position
2188	if { $title != "" } {
2189	$c itemconfigure title -text $title
2190	$c coords title $x $y
2191	incr y $lineht
2192	}
2193	$c coords vmax $x $y
2194	incr y $lineht
2195	$c coords colormap $x $y
2196	$c coords sensor [expr $x - $iw] $y $x [expr $y + $ih]
2197	$c raise sensor
2198	$c coords vmin $x [expr {$h - 2}]
2199	}
2200
2201	#
2202	# EnterLegend --
2203	#
2204	itcl::body Rappture::VtkImageViewer::EnterLegend { x y } {
2205	SetLegendTip $x $y
2206	}
2207
2208	#
2209	# MotionLegend --
2210	#
2211	itcl::body Rappture::VtkImageViewer::MotionLegend { x y } {
2212	Rappture::Tooltip::tooltip cancel
2213	set c $itk_component(view)
2214	set cw [winfo width $c]
2215	set ch [winfo height $c]
2216	if { $x >= 0 && $x < $cw && $y >= 0 && $y < $ch } {
2217	SetLegendTip $x $y
2218	}
2219	}
2220
2221	#
2222	# LeaveLegend --
2223	#
2224	itcl::body Rappture::VtkImageViewer::LeaveLegend { } {
2225	Rappture::Tooltip::tooltip cancel
2226	.rappturetooltip configure -icon ""
2227	}
2228
2229	#
2230	# SetLegendTip --
2231	#
2232	itcl::body Rappture::VtkImageViewer::SetLegendTip { x y } {
2233	set fname $_curFldName
2234	set c $itk_component(view)
2235	set w [winfo width $c]
2236	set h [winfo height $c]
2237	set font "Arial 8"
2238	set lineht [font metrics $font -linespace]
2239
2240	set ih [image height $_image(legend)]
2241	# Subtract off the offset of the color ramp from the top of the canvas
2242	set iy [expr $y - ($lineht + 2)]
2243
2244	if { [string match "component*" $fname] } {
2245	set title ""
2246	} else {
2247	if { [info exists _fields($fname)] } {
2248	foreach { title units } $_fields($fname) break
2249	if { $units != "" } {
2250	set title [format "%s (%s)" $title $units]
2251	}
2252	} else {
2253	set title $fname
2254	}
2255	}
2256	# If there's a legend title, increase the offset by the line height.
2257	if { $title != "" } {
2258	incr iy -$lineht
2259	}
2260
2261	# Make a swatch of the selected color
2262	if { [catch { $_image(legend) get 10 $iy } pixel] != 0 } {
2263	return
2264	}
2265
2266	if { ![info exists _image(swatch)] } {
2267	set _image(swatch) [image create photo -width 24 -height 24]
2268	}
2269	set color [eval format "\#%02x%02x%02x" $pixel]
2270	$_image(swatch) put black -to 0 0 23 23
2271	$_image(swatch) put $color -to 1 1 22 22
2272
2273	# Compute the value of the point
2274	if { [info exists _limits($fname)] } {
2275	foreach { vmin vmax } $_limits($fname) break
2276	set t [expr 1.0 - (double($iy) / double($ih-1))]
2277	set value [expr $t * ($vmax - $vmin) + $vmin]
2278	} else {
2279	set value 0.0
2280	}
2281	set tipx [expr $x + 15]
2282	set tipy [expr $y - 5]
2283	.rappturetooltip configure -icon $_image(swatch)
2284	if { [info exists _isolines($y)] } {
2285	Rappture::Tooltip::text $c [format "$title %g (isoline)" $_isolines($y)]
2286	} else {
2287	Rappture::Tooltip::text $c [format "$title %g" $value]
2288	}
2289	Rappture::Tooltip::tooltip show $c +$tipx,+$tipy
2290	}
2291
2292	# ----------------------------------------------------------------------
2293	# USAGE: _dropdown post
2294	# USAGE: _dropdown unpost
2295	# USAGE: _dropdown select
2296	#
2297	# Used internally to handle the dropdown list for this combobox. The
2298	# post/unpost options are invoked when the list is posted or unposted
2299	# to manage the relief of the controlling button. The select option
2300	# is invoked whenever there is a selection from the list, to assign
2301	# the value back to the gauge.
2302	# ----------------------------------------------------------------------
2303	itcl::body Rappture::VtkImageViewer::Combo {option} {
2304	set c $itk_component(view)
2305	switch -- $option {
2306	post {
2307	foreach { x1 y1 x2 y2 } [$c bbox title] break
2308	set x1 [expr [winfo width $itk_component(view)] - [winfo reqwidth $itk_component(fieldmenu)]]
2309	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2310	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2311	tk_popup $itk_component(fieldmenu) $x $y
2312	}
2313	activate {
2314	$c itemconfigure title -fill red
2315	}
2316	deactivate {
2317	$c itemconfigure title -fill $itk_option(-plotforeground)
2318	}
2319	invoke {
2320	$itk_component(field) value $_curFldLabel
2321	AdjustSetting field
2322	}
2323	default {
2324	error "bad option \"$option\": should be post, unpost, select"
2325	}
2326	}
2327	}
2328
2329	itcl::body Rappture::VtkImageViewer::SetOrientation { side } {
2330	array set positions {
2331	front "0.707107 0.707107 0 0"
2332	back "0 0 0.707107 0.707107"
2333	left "0.5 0.5 -0.5 -0.5"
2334	right "0.5 0.5 0.5 0.5"
2335	top "1 0 0 0"
2336	bottom "0 1 0 0"
2337	}
2338	foreach name { qw qx qy qz } value $positions($side) {
2339	set _view($name) $value
2340	}
2341	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2342	$_arcball quaternion $q
2343	SendCmd "camera orient $q"
2344	SendCmd "camera reset"
2345	set _view(xpan) 0
2346	set _view(ypan) 0
2347	set _view(zoom) 1.0
2348	}

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