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source: branches/1.3/gui/scripts/vtkimageviewer.tcl @ 4512

Last change on this file since 4512 was 4512, checked in by gah, 10 years ago
test and fixes for meshviewer, add rappture (non-viewer) bug fixes and features
File size: 77.0 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
121	private variable _maxScale 100; # This is the # of times the x-axis
122	# and y-axis ranges can differ before
123	# automatically turning on
124	# -stretchtofit
125
126	private variable _click ; # info used for rotate operations
127	private variable _limits ; # Holds overall limits for all dataobjs
128	# using the viewer.
129	private variable _view ; # view params for 3D view
130	private variable _settings
131	private variable _changed
132	private variable _initialStyle ""; # First found style in dataobjects.
133	private variable _reset 1; # Indicates if camera needs to be reset
134	# to starting position.
135	private variable _beforeConnect 1; # Indicates if camera needs to be reset
136	# to starting position.
137
138	private variable _first "" ; # This is the topmost dataset.
139	private variable _start 0
140	private variable _isolines
141	private variable _contourList ""
142
143	common _downloadPopup; # download options from popup
144	private common _hardcopy
145	private variable _width 0
146	private variable _height 0
147	private variable _legendWidth 0
148	private variable _legendHeight 0
149	private variable _resizePending 0
150	private variable _rotatePending 0
151	private variable _legendPending 0
152	private variable _fieldNames {}
153	private variable _fields
154	private variable _curFldName ""
155	private variable _curFldLabel ""
156	private variable _colorMode "scalar";# Mode of colormap (vmag or scalar)
157	}
158
159	itk::usual VtkImageViewer {
160	keep -background -foreground -cursor -font
161	keep -plotbackground -plotforeground -mode
162	}
163
164	# ----------------------------------------------------------------------
165	# CONSTRUCTOR
166	# ----------------------------------------------------------------------
167	itcl::body Rappture::VtkImageViewer::constructor {hostlist args} {
168	set _serverType "vtkvis"
169
170	EnableWaitDialog 900
171	# Rebuild event
172	$_dispatcher register !rebuild
173	$_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
174
175	# Resize event
176	$_dispatcher register !resize
177	$_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
178
179	# Rotate event
180	$_dispatcher register !rotate
181	$_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
182
183	# Legend event
184	$_dispatcher register !legend
185	$_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
186
187	#
188	# Populate parser with commands handle incoming requests
189	#
190	$_parser alias image [itcl::code $this ReceiveImage]
191	$_parser alias dataset [itcl::code $this ReceiveDataset]
192	$_parser alias legend [itcl::code $this ReceiveLegend]
193
194	# Create image for legend colorbar.
195	set _image(legend) [image create photo]
196
197	# Initialize the view to some default parameters.
198	array set _view {
199	qw 0.36
200	qx 0.25
201	qy 0.50
202	qz 0.70
203	zoom 1.0
204	xpan 0
205	ypan 0
206	ortho 0
207	}
208	set _arcball [blt::arcball create 100 100]
209	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
210	$_arcball quaternion $q
211
212	array set _settings {
213	axisFlymode "static"
214	axisLabels 1
215	axisMinorTicks 1
216	axisVisible 1
217	axisXGrid 0
218	axisYGrid 0
219	axisZGrid 0
220	backingColor white
221	backingVisible 1
222	colormapDiscrete 0
223	field "Default"
224	legendVisible 0
225	level 127.5
226	numColors 256
227	opacity 100
228	outline 0
229	saveOpacity 100
230	stretchToFit 0
231	view3D 0
232	window 255.0
233	}
234	array set _changed {
235	opacity 0
236	colormap 0
237	}
238	itk_component add view {
239	canvas $itk_component(plotarea).view \
240	-highlightthickness 0 -borderwidth 0
241	} {
242	usual
243	ignore -highlightthickness -borderwidth -background
244	}
245
246	itk_component add fieldmenu {
247	menu $itk_component(plotarea).menu \
248	-relief flat \
249	-tearoff no
250	} {
251	usual
252	ignore -background -foreground -relief -tearoff
253	}
254	set c $itk_component(view)
255	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
256	bind $c <4> [itcl::code $this Zoom in 0.25]
257	bind $c <5> [itcl::code $this Zoom out 0.25]
258	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
259	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
260	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
261	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
262	bind $c <Enter> "focus %W"
263	bind $c <Control-F1> [itcl::code $this ToggleConsole]
264
265	# Fix the scrollregion in case we go off screen
266	$c configure -scrollregion [$c bbox all]
267
268	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
269	set _map(cwidth) -1
270	set _map(cheight) -1
271	set _map(zoom) 1.0
272	set _map(original) ""
273
274	set f [$itk_component(main) component controls]
275	itk_component add reset {
276	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
277	-highlightthickness 0 \
278	-image [Rappture::icon reset-view] \
279	-command [itcl::code $this Zoom reset]
280	} {
281	usual
282	ignore -highlightthickness
283	}
284	pack $itk_component(reset) -side top -padx 2 -pady { 2 0 }
285	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
286
287	itk_component add zoomin {
288	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
289	-highlightthickness 0 \
290	-image [Rappture::icon zoom-in] \
291	-command [itcl::code $this Zoom in]
292	} {
293	usual
294	ignore -highlightthickness
295	}
296	pack $itk_component(zoomin) -side top -padx 2 -pady { 2 0 }
297	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
298
299	itk_component add zoomout {
300	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
301	-highlightthickness 0 \
302	-image [Rappture::icon zoom-out] \
303	-command [itcl::code $this Zoom out]
304	} {
305	usual
306	ignore -highlightthickness
307	}
308	pack $itk_component(zoomout) -side top -padx 2 -pady { 2 0 }
309	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
310
311	itk_component add mode {
312	Rappture::PushButton $f.mode \
313	-onimage [Rappture::icon surface] \
314	-offimage [Rappture::icon surface] \
315	-variable [itcl::scope _settings(view3D)] \
316	-command [itcl::code $this AdjustSetting view3D] \
317	}
318	Rappture::Tooltip::for $itk_component(mode) \
319	"Toggle the surface/contour on/off"
320	pack $itk_component(mode) -padx 2 -pady { 2 0 }
321
322	itk_component add stretchtofit {
323	Rappture::PushButton $f.stretchtofit \
324	-onimage [Rappture::icon stretchtofit] \
325	-offimage [Rappture::icon stretchtofit] \
326	-variable [itcl::scope _settings(stretchToFit)] \
327	-command [itcl::code $this AdjustSetting stretchToFit] \
328	}
329	Rappture::Tooltip::for $itk_component(stretchtofit) \
330	"Stretch plot to fit window on/off"
331	pack $itk_component(stretchtofit) -padx 2 -pady 2
332
333	if { [catch {
334	BuildImageTab
335	BuildAxisTab
336	BuildCameraTab
337	} errs] != 0 } {
338	global errorInfo
339	puts stderr "errs=$errs errorInfo=$errorInfo"
340	}
341
342	# Hack around the Tk panewindow. The problem is that the requested
343	# size of the 3d view isn't set until an image is retrieved from
344	# the server. So the panewindow uses the tiny size.
345	set w 10000
346	pack forget $itk_component(view)
347	blt::table $itk_component(plotarea) \
348	0,0 $itk_component(view) -fill both -reqwidth $w
349	blt::table configure $itk_component(plotarea) c1 -resize none
350
351	# Bindings for panning via mouse
352	bind $itk_component(view) <ButtonPress-2> \
353	[itcl::code $this Pan click %x %y]
354	bind $itk_component(view) <B2-Motion> \
355	[itcl::code $this Pan drag %x %y]
356	bind $itk_component(view) <ButtonRelease-2> \
357	[itcl::code $this Pan release %x %y]
358
359	#bind $itk_component(view) <ButtonRelease-3> \
360	# [itcl::code $this Pick %x %y]
361
362	# Bindings for panning via keyboard
363	bind $itk_component(view) <KeyPress-Left> \
364	[itcl::code $this Pan set -10 0]
365	bind $itk_component(view) <KeyPress-Right> \
366	[itcl::code $this Pan set 10 0]
367	bind $itk_component(view) <KeyPress-Up> \
368	[itcl::code $this Pan set 0 -10]
369	bind $itk_component(view) <KeyPress-Down> \
370	[itcl::code $this Pan set 0 10]
371	bind $itk_component(view) <Shift-KeyPress-Left> \
372	[itcl::code $this Pan set -2 0]
373	bind $itk_component(view) <Shift-KeyPress-Right> \
374	[itcl::code $this Pan set 2 0]
375	bind $itk_component(view) <Shift-KeyPress-Up> \
376	[itcl::code $this Pan set 0 -2]
377	bind $itk_component(view) <Shift-KeyPress-Down> \
378	[itcl::code $this Pan set 0 2]
379
380	# Bindings for zoom via keyboard
381	bind $itk_component(view) <KeyPress-Prior> \
382	[itcl::code $this Zoom out]
383	bind $itk_component(view) <KeyPress-Next> \
384	[itcl::code $this Zoom in]
385
386	bind $itk_component(view) <Enter> "focus $itk_component(view)"
387
388	if {[string equal "x11" [tk windowingsystem]]} {
389	# Bindings for zoom via mouse
390	bind $itk_component(view) <4> [itcl::code $this Zoom out]
391	bind $itk_component(view) <5> [itcl::code $this Zoom in]
392	}
393
394	set _image(download) [image create photo]
395	eval itk_initialize $args
396	Connect
397	set _beforeConnect 0
398	}
399
400	# ----------------------------------------------------------------------
401	# DESTRUCTOR
402	# ----------------------------------------------------------------------
403	itcl::body Rappture::VtkImageViewer::destructor {} {
404	Disconnect
405	image delete $_image(plot)
406	image delete $_image(download)
407	catch { blt::arcball destroy $_arcball }
408	}
409
410	itcl::body Rappture::VtkImageViewer::DoResize {} {
411	if { $_width < 2 } {
412	set _width 500
413	}
414	if { $_height < 2 } {
415	set _height 500
416	}
417	set _start [clock clicks -milliseconds]
418	SendCmd "screen size [expr $_width - 20] $_height"
419
420	set font "Arial 8"
421	set lh [font metrics $font -linespace]
422	set h [expr {$_height - 2 * ($lh + 2)}]
423	if { $h != $_legendHeight } {
424	EventuallyRequestLegend
425	} else {
426	DrawLegend
427	}
428	set _resizePending 0
429	}
430
431	itcl::body Rappture::VtkImageViewer::DoRotate {} {
432	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
433	SendCmd "camera orient $q"
434	set _rotatePending 0
435	}
436
437	itcl::body Rappture::VtkImageViewer::EventuallyRequestLegend {} {
438	if { !$_legendPending } {
439	set _legendPending 1
440	$_dispatcher event -idle !legend
441	}
442	}
443
444	itcl::body Rappture::VtkImageViewer::EventuallyResize { w h } {
445	set _width $w
446	set _height $h
447	$_arcball resize $w $h
448	if { !$_resizePending } {
449	set _resizePending 1
450	$_dispatcher event -after 250 !resize
451	}
452	}
453
454	set rotate_delay 100
455
456	itcl::body Rappture::VtkImageViewer::EventuallyRotate { q } {
457	foreach { _view(qw) _view(qx) _view(qy) _view(qz) } $q break
458	if { !$_rotatePending } {
459	set _rotatePending 1
460	global rotate_delay
461	$_dispatcher event -after $rotate_delay !rotate
462	}
463	}
464
465	# ----------------------------------------------------------------------
466	# USAGE: add <dataobj> ?<settings>?
467	#
468	# Clients use this to add a data object to the plot. The optional
469	# <settings> are used to configure the plot. Allowed settings are
470	# -color, -brightness, -width, -linestyle, and -raise.
471	# ----------------------------------------------------------------------
472	itcl::body Rappture::VtkImageViewer::add {dataobj {settings ""}} {
473	if { ![$dataobj isvalid] } {
474	return; # Object doesn't contain valid data.
475	}
476	array set params {
477	-color auto
478	-width 1
479	-linestyle solid
480	-brightness 0
481	-raise 0
482	-description ""
483	-param ""
484	-type ""
485	}
486	array set params $settings
487	set params(-description) ""
488	set params(-param) ""
489	array set params $settings
490
491	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
492	# can't handle -autocolors yet
493	set params(-color) white
494	}
495	set pos [lsearch -exact $_dlist $dataobj]
496	if {$pos < 0} {
497	lappend _dlist $dataobj
498	}
499	set _obj2ovride($dataobj-color) $params(-color)
500	set _obj2ovride($dataobj-width) $params(-width)
501	set _obj2ovride($dataobj-raise) $params(-raise)
502	$_dispatcher event -idle !rebuild
503	}
504
505
506	# ----------------------------------------------------------------------
507	# USAGE: delete ?<dataobj1> <dataobj2> ...?
508	#
509	# Clients use this to delete a dataobj from the plot. If no dataobjs
510	# are specified, then all dataobjs are deleted. No data objects are
511	# deleted. They are only removed from the display list.
512	#
513	# ----------------------------------------------------------------------
514	itcl::body Rappture::VtkImageViewer::delete {args} {
515	if { [llength $args] == 0} {
516	set args $_dlist
517	}
518	# Delete all specified dataobjs
519	set changed 0
520	foreach dataobj $args {
521	set pos [lsearch -exact $_dlist $dataobj]
522	if { $pos < 0 } {
523	continue; # Don't know anything about it.
524	}
525	# Remove it from the dataobj list.
526	set _dlist [lreplace $_dlist $pos $pos]
527	array unset _obj2ovride $dataobj-*
528	array unset _settings $dataobj-*
529	set changed 1
530	}
531	# If anything changed, then rebuild the plot
532	if { $changed } {
533	$_dispatcher event -idle !rebuild
534	}
535	}
536
537	# ----------------------------------------------------------------------
538	# USAGE: get ?-objects?
539	# USAGE: get ?-visible?
540	# USAGE: get ?-image view?
541	#
542	# Clients use this to query the list of objects being plotted, in
543	# order from bottom to top of this result. The optional "-image"
544	# flag can also request the internal images being shown.
545	# ----------------------------------------------------------------------
546	itcl::body Rappture::VtkImageViewer::get {args} {
547	if {[llength $args] == 0} {
548	set args "-objects"
549	}
550	set op [lindex $args 0]
551	switch -- $op {
552	"-objects" {
553	# put the dataobj list in order according to -raise options
554	set dlist {}
555	foreach dataobj $_dlist {
556	if { ![IsValidObject $dataobj] } {
557	continue
558	}
559	if {[info exists _obj2ovride($dataobj-raise)] &&
560	$_obj2ovride($dataobj-raise)} {
561	set dlist [linsert $dlist 0 $dataobj]
562	} else {
563	lappend dlist $dataobj
564	}
565	}
566	return $dlist
567	}
568	"-visible" {
569	set dlist {}
570	foreach dataobj $_dlist {
571	if { ![IsValidObject $dataobj] } {
572	continue
573	}
574	if { ![info exists _obj2ovride($dataobj-raise)] } {
575	# No setting indicates that the object isn't visible.
576	continue
577	}
578	# Otherwise use the -raise parameter to put the object to
579	# the front of the list.
580	if { $_obj2ovride($dataobj-raise) } {
581	set dlist [linsert $dlist 0 $dataobj]
582	} else {
583	lappend dlist $dataobj
584	}
585	}
586	return $dlist
587	}
588	-image {
589	if {[llength $args] != 2} {
590	error "wrong # args: should be \"get -image view\""
591	}
592	switch -- [lindex $args end] {
593	view {
594	return $_image(plot)
595	}
596	default {
597	error "bad image name \"[lindex $args end]\": should be view"
598	}
599	}
600	}
601	default {
602	error "bad option \"$op\": should be -objects or -image"
603	}
604	}
605	}
606
607	#
608	# scale --
609	#
610	# This gets called either incrementally as new simulations are
611	# added or all at once as a sequence of images.
612	# This accounts for all objects--even those not showing on the
613	# screen. Because of this, the limits are appropriate for all
614	# objects as the user scans through data in the ResultSet viewer.
615	#
616	itcl::body Rappture::VtkImageViewer::scale {args} {
617	foreach dataobj $args {
618	if { ![$dataobj isvalid] } {
619	continue; # Object doesn't contain valid data.
620	}
621	foreach axis { x y } {
622	set lim [$dataobj limits $axis]
623	if { ![info exists _limits($axis)] } {
624	set _limits($axis) $lim
625	continue
626	}
627	foreach {min max} $lim break
628	foreach {amin amax} $_limits($axis) break
629	if { $amin > $min } {
630	set amin $min
631	}
632	if { $amax < $max } {
633	set amax $max
634	}
635	set _limits($axis) [list $amin $amax]
636	set units [$dataobj hints ${axis}units]
637	set found($units) 1
638	}
639	foreach { fname lim } [$dataobj fieldlimits] {
640	if { ![info exists _limits($fname)] } {
641	set _limits($fname) $lim
642	continue
643	}
644	foreach {min max} $lim break
645	foreach {fmin fmax} $_limits($fname) break
646	if { $fmin > $min } {
647	set fmin $min
648	}
649	if { $fmax < $max } {
650	set fmax $max
651	}
652	set _limits($fname) [list $fmin $fmax]
653	}
654	}
655	if { [array size found] > 1 } {
656	set _settings(stretchToFit) 1
657	} else {
658	# Check if the range of the x and y axes requires that we stretch
659	# the contour to fit the plotting area. This can happen when the
660	# x and y scales differ greatly (> 100x)
661	foreach {xmin xmax} $_limits(x) break
662	foreach {ymin ymax} $_limits(y) break
663	if { (($xmax - $xmin) > (($ymax -$ymin) * $_maxScale)) \|\|
664	((($xmax - $xmin) * $_maxScale) < ($ymax -$ymin)) } {
665	set _settings(stretchToFit) 1
666	}
667	}
668	}
669
670	# ----------------------------------------------------------------------
671	# USAGE: download coming
672	# USAGE: download controls <downloadCommand>
673	# USAGE: download now
674	#
675	# Clients use this method to create a downloadable representation
676	# of the plot. Returns a list of the form {ext string}, where
677	# "ext" is the file extension (indicating the type of data) and
678	# "string" is the data itself.
679	# ----------------------------------------------------------------------
680	itcl::body Rappture::VtkImageViewer::download {option args} {
681	switch $option {
682	coming {
683	if {[catch {
684	blt::winop snap $itk_component(plotarea) $_image(download)
685	}]} {
686	$_image(download) configure -width 1 -height 1
687	$_image(download) put #000000
688	}
689	}
690	controls {
691	set popup .vtkviewerdownload
692	if { ![winfo exists .vtkviewerdownload] } {
693	set inner [BuildDownloadPopup $popup [lindex $args 0]]
694	} else {
695	set inner [$popup component inner]
696	}
697	set _downloadPopup(image_controls) $inner.image_frame
698	set num [llength [get]]
699	set num [expr {($num == 1) ? "1 result" : "$num results"}]
700	set word [Rappture::filexfer::label downloadWord]
701	$inner.summary configure -text "$word $num in the following format:"
702	update idletasks ;# Fix initial sizes
703	return $popup
704	}
705	now {
706	set popup .vtkviewerdownload
707	if {[winfo exists .vtkviewerdownload]} {
708	$popup deactivate
709	}
710	switch -- $_downloadPopup(format) {
711	"image" {
712	return [$this GetImage [lindex $args 0]]
713	}
714	"vtk" {
715	return [$this GetVtkData [lindex $args 0]]
716	}
717	}
718	return ""
719	}
720	default {
721	error "bad option \"$option\": should be coming, controls, now"
722	}
723	}
724	}
725
726	# ----------------------------------------------------------------------
727	# USAGE: Connect ?<host:port>,<host:port>...?
728	#
729	# Clients use this method to establish a connection to a new
730	# server, or to reestablish a connection to the previous server.
731	# Any existing connection is automatically closed.
732	# ----------------------------------------------------------------------
733	itcl::body Rappture::VtkImageViewer::Connect {} {
734	global readyForNextFrame
735	set readyForNextFrame 1
736	set _reset 1
737	set _hosts [GetServerList "vtkvis"]
738	if { "" == $_hosts } {
739	return 0
740	}
741	set result [VisViewer::Connect $_hosts]
742	if { $result } {
743	if { $_reportClientInfo } {
744	# Tell the server the viewer, hub, user and session.
745	# Do this immediately on connect before buffering any commands
746	global env
747
748	set info {}
749	set user "???"
750	if { [info exists env(USER)] } {
751	set user $env(USER)
752	}
753	set session "???"
754	if { [info exists env(SESSION)] } {
755	set session $env(SESSION)
756	}
757	lappend info "hub" [exec hostname]
758	lappend info "client" "vtkimageviewer"
759	lappend info "user" $user
760	lappend info "session" $session
761	SendCmd "clientinfo [list $info]"
762	}
763	set w [winfo width $itk_component(view)]
764	set h [winfo height $itk_component(view)]
765	EventuallyResize $w $h
766	}
767	return $result
768	}
769
770	#
771	# isconnected --
772	#
773	# Indicates if we are currently connected to the visualization server.
774	#
775	itcl::body Rappture::VtkImageViewer::isconnected {} {
776	return [VisViewer::IsConnected]
777	}
778
779	#
780	# disconnect --
781	#
782	itcl::body Rappture::VtkImageViewer::disconnect {} {
783	Disconnect
784	set _reset 1
785	}
786
787	#
788	# Disconnect --
789	#
790	# Clients use this method to disconnect from the current rendering
791	# server.
792	#
793	itcl::body Rappture::VtkImageViewer::Disconnect {} {
794	VisViewer::Disconnect
795
796	$_dispatcher cancel !rebuild
797	$_dispatcher cancel !resize
798	$_dispatcher cancel !rotate
799	$_dispatcher cancel !legend
800	# disconnected -- no more data sitting on server
801	array unset _datasets
802	array unset _data
803	array unset _colormaps
804	array unset _obj2datasets
805	global readyForNextFrame
806	set readyForNextFrame 1
807	}
808
809	# ----------------------------------------------------------------------
810	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
811	#
812	# Invoked automatically whenever the "image" command comes in from
813	# the rendering server. Indicates that binary image data with the
814	# specified <size> will follow.
815	# ----------------------------------------------------------------------
816	itcl::body Rappture::VtkImageViewer::ReceiveImage { args } {
817	global readyForNextFrame
818	set readyForNextFrame 1
819	array set info {
820	-token "???"
821	-bytes 0
822	-type image
823	}
824	array set info $args
825	set bytes [ReceiveBytes $info(-bytes)]
826	if { $info(-type) == "image" } {
827	if 0 {
828	set f [open "last.ppm" "w"]
829	puts $f $bytes
830	close $f
831	}
832	$_image(plot) configure -data $bytes
833	set time [clock seconds]
834	set date [clock format $time]
835	#puts stderr "$date: received image [image width $_image(plot)]x[image height $_image(plot)] image>"
836	if { $_start > 0 } {
837	set finish [clock clicks -milliseconds]
838	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
839	set _start 0
840	}
841	} elseif { $info(type) == "print" } {
842	set tag $this-print-$info(-token)
843	set _hardcopy($tag) $bytes
844	}
845	}
846
847	#
848	# ReceiveDataset --
849	#
850	itcl::body Rappture::VtkImageViewer::ReceiveDataset { args } {
851	if { ![isconnected] } {
852	return
853	}
854	set option [lindex $args 0]
855	switch -- $option {
856	"scalar" {
857	set option [lindex $args 1]
858	switch -- $option {
859	"world" {
860	foreach { x y z value tag } [lrange $args 2 end] break
861	}
862	"pixel" {
863	foreach { x y value tag } [lrange $args 2 end] break
864	}
865	}
866	}
867	"vector" {
868	set option [lindex $args 1]
869	switch -- $option {
870	"world" {
871	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
872	}
873	"pixel" {
874	foreach { x y vx vy vz tag } [lrange $args 2 end] break
875	}
876	}
877	}
878	"names" {
879	foreach { name } [lindex $args 1] {
880	#puts stderr "Dataset: $name"
881	}
882	}
883	default {
884	error "unknown dataset option \"$option\" from server"
885	}
886	}
887	}
888
889	# ----------------------------------------------------------------------
890	# USAGE: Rebuild
891	#
892	# Called automatically whenever something changes that affects the
893	# data in the widget. Clears any existing data and rebuilds the
894	# widget to display new data.
895	# ----------------------------------------------------------------------
896	itcl::body Rappture::VtkImageViewer::Rebuild {} {
897	set w [winfo width $itk_component(view)]
898	set h [winfo height $itk_component(view)]
899	if { $w < 2 \|\| $h < 2 } {
900	$_dispatcher event -idle !rebuild
901	return
902	}
903
904	# Turn on buffering of commands to the server. We don't want to
905	# be preempted by a server disconnect/reconnect (which automatically
906	# generates a new call to Rebuild).
907	StartBufferingCommands
908
909	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
910	set _width $w
911	set _height $h
912	$_arcball resize $w $h
913	DoResize
914	if { $_settings(stretchToFit) } {
915	AdjustSetting stretchToFit
916	}
917	}
918	if { $_reset } {
919	#
920	# Reset the camera and other view parameters
921	#
922	InitSettings view3D background
923
924	# Let's see how this goes. I think it's preferable to overloading the
925	# axis title with the exponent.
926	SendCmd "axis exp 0 0 0 1"
927
928	SendCmd "axis lrot z 90"
929	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
930	$_arcball quaternion $q
931	if {$_settings(view3D) } {
932	if { $_view(ortho)} {
933	SendCmd "camera mode ortho"
934	} else {
935	SendCmd "camera mode persp"
936	}
937	DoRotate
938	SendCmd "camera reset"
939	}
940	PanCamera
941	StopBufferingCommands
942	SendCmd "imgflush"
943	StartBufferingCommands
944	}
945
946	set _first ""
947	# Start off with no datasets are visible.
948	SendCmd "dataset visible 0"
949	foreach dataobj [get -objects] {
950	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
951	set _first $dataobj
952	}
953	set _obj2datasets($dataobj) ""
954	foreach comp [$dataobj components] {
955	set tag $dataobj-$comp
956	if { ![info exists _datasets($tag)] } {
957	set bytes [$dataobj vtkdata $comp]
958	if 0 {
959	set f [open /tmp/vtkimage.vtk "w"]
960	puts $f $bytes
961	close $f
962	}
963	set length [string length $bytes]
964	if { $_reportClientInfo } {
965	set info {}
966	lappend info "tool_id" [$dataobj hints toolId]
967	lappend info "tool_name" [$dataobj hints toolName]
968	lappend info "tool_version" [$dataobj hints toolRevision]
969	lappend info "tool_title" [$dataobj hints toolTitle]
970	lappend info "dataset_label" [$dataobj hints label]
971	lappend info "dataset_size" $length
972	lappend info "dataset_tag" $tag
973	SendCmd [list "clientinfo" $info]
974	}
975	SendCmd "dataset add $tag data follows $length"
976	append _outbuf $bytes
977	set _datasets($tag) 1
978	SetObjectStyle $dataobj $comp
979	}
980	lappend _obj2datasets($dataobj) $tag
981	if { [info exists _obj2ovride($dataobj-raise)] } {
982	# Setting dataset visible enables outline
983	# and image
984	SendCmd "dataset visible 1 $tag"
985	}
986	}
987	}
988	if { $_first != "" } {
989	$itk_component(field) choices delete 0 end
990	$itk_component(fieldmenu) delete 0 end
991	array unset _fields
992	set _curFldName ""
993	foreach cname [$_first components] {
994	foreach fname [$_first fieldnames $cname] {
995	if { [info exists _fields($fname)] } {
996	continue
997	}
998	foreach { label units components } \
999	[$_first fieldinfo $fname] break
1000	$itk_component(field) choices insert end "$fname" "$label"
1001	$itk_component(fieldmenu) add radiobutton -label "$label" \
1002	-value $label -variable [itcl::scope _curFldLabel] \
1003	-selectcolor red \
1004	-activebackground $itk_option(-plotbackground) \
1005	-activeforeground $itk_option(-plotforeground) \
1006	-font "Arial 8" \
1007	-command [itcl::code $this Combo invoke]
1008	set _fields($fname) [list $label $units $components]
1009	if { $_curFldName == "" } {
1010	set _curFldName $fname
1011	set _curFldLabel $label
1012	}
1013	}
1014	}
1015	$itk_component(field) value $_curFldLabel
1016	}
1017	InitSettings stretchToFit outline
1018
1019	if { $_reset } {
1020	SendCmd "axis tickpos outside"
1021	foreach axis { x y z } {
1022	SendCmd "axis lformat $axis %g"
1023	}
1024
1025	foreach axis { x y z } {
1026	set label [$_first hints ${axis}label]
1027	if { $label == "" } {
1028	set label [string toupper $axis]
1029	}
1030	# May be a space in the axis label.
1031	SendCmd [list axis name $axis $label]
1032
1033	if {$axis == "z" && [$_first hints ${axis}units] == ""} {
1034	set units [lindex $_fields($_curFldName) 1]
1035	} else {
1036	set units [$_first hints ${axis}units]
1037	}
1038	if { $units != "" } {
1039	# May be a space in the axis units.
1040	SendCmd [list axis units $axis $units]
1041	}
1042	}
1043	#
1044	# Reset the camera and other view parameters
1045	#
1046	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1047	$_arcball quaternion $q
1048	if {$_settings(view3D) } {
1049	if { $_view(ortho)} {
1050	SendCmd "camera mode ortho"
1051	} else {
1052	SendCmd "camera mode persp"
1053	}
1054	DoRotate
1055	SendCmd "camera reset"
1056	}
1057	PanCamera
1058	InitSettings axisXGrid axisYGrid axisZGrid \
1059	axisVisible axisLabels field view3D
1060	if { [array size _fields] < 2 } {
1061	blt::table forget $itk_component(field) $itk_component(field_l)
1062	}
1063	RequestLegend
1064	set _reset 0
1065	}
1066	global readyForNextFrame
1067	set readyForNextFrame 0; # Don't advance to the next frame
1068
1069	# Actually write the commands to the server socket. If it fails, we don't
1070	# care. We're finished here.
1071	blt::busy hold $itk_component(hull)
1072	StopBufferingCommands
1073	blt::busy release $itk_component(hull)
1074	}
1075
1076	# ----------------------------------------------------------------------
1077	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1078	#
1079	# Returns a list of server IDs for the current datasets being displayed. This
1080	# is normally a single ID, but it might be a list of IDs if the current data
1081	# object has multiple components.
1082	# ----------------------------------------------------------------------
1083	itcl::body Rappture::VtkImageViewer::CurrentDatasets {args} {
1084	set flag [lindex $args 0]
1085	switch -- $flag {
1086	"-all" {
1087	if { [llength $args] > 1 } {
1088	error "CurrentDatasets: can't specify dataobj after \"-all\""
1089	}
1090	set dlist [get -objects]
1091	}
1092	"-visible" {
1093	if { [llength $args] > 1 } {
1094	set dlist {}
1095	set args [lrange $args 1 end]
1096	foreach dataobj $args {
1097	if { [info exists _obj2ovride($dataobj-raise)] } {
1098	lappend dlist $dataobj
1099	}
1100	}
1101	} else {
1102	set dlist [get -visible]
1103	}
1104	}
1105	default {
1106	set dlist $args
1107	}
1108	}
1109	set rlist ""
1110	foreach dataobj $dlist {
1111	foreach comp [$dataobj components] {
1112	set tag $dataobj-$comp
1113	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1114	lappend rlist $tag
1115	}
1116	}
1117	}
1118	return $rlist
1119	}
1120
1121	# ----------------------------------------------------------------------
1122	# USAGE: Zoom in
1123	# USAGE: Zoom out
1124	# USAGE: Zoom reset
1125	#
1126	# Called automatically when the user clicks on one of the zoom
1127	# controls for this widget. Changes the zoom for the current view.
1128	# ----------------------------------------------------------------------
1129	itcl::body Rappture::VtkImageViewer::Zoom {option} {
1130	switch -- $option {
1131	"in" {
1132	set _view(zoom) [expr {$_view(zoom)*1.25}]
1133	SendCmd "camera zoom $_view(zoom)"
1134	}
1135	"out" {
1136	set _view(zoom) [expr {$_view(zoom)*0.8}]
1137	SendCmd "camera zoom $_view(zoom)"
1138	}
1139	"reset" {
1140	array set _view {
1141	qw 0.36
1142	qx 0.25
1143	qy 0.50
1144	qz 0.70
1145	zoom 1.0
1146	xpan 0
1147	ypan 0
1148	}
1149	if { $_first != "" } {
1150	set location [$_first hints camera]
1151	if { $location != "" } {
1152	array set _view $location
1153	}
1154	}
1155	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1156	$_arcball quaternion $q
1157	if {$_settings(view3D) } {
1158	DoRotate
1159	}
1160	SendCmd "camera reset"
1161	}
1162	}
1163	}
1164
1165	itcl::body Rappture::VtkImageViewer::PanCamera {} {
1166	set x $_view(xpan)
1167	set y $_view(ypan)
1168	SendCmd "camera pan $x $y"
1169	}
1170
1171
1172	# ----------------------------------------------------------------------
1173	# USAGE: Rotate click <x> <y>
1174	# USAGE: Rotate drag <x> <y>
1175	# USAGE: Rotate release <x> <y>
1176	#
1177	# Called automatically when the user clicks/drags/releases in the
1178	# plot area. Moves the plot according to the user's actions.
1179	# ----------------------------------------------------------------------
1180	itcl::body Rappture::VtkImageViewer::Rotate {option x y} {
1181	switch -- $option {
1182	"click" {
1183	$itk_component(view) configure -cursor fleur
1184	set _click(x) $x
1185	set _click(y) $y
1186	}
1187	"drag" {
1188	if {[array size _click] == 0} {
1189	Rotate click $x $y
1190	} else {
1191	set w [winfo width $itk_component(view)]
1192	set h [winfo height $itk_component(view)]
1193	if {$w <= 0 \|\| $h <= 0} {
1194	return
1195	}
1196
1197	if {[catch {
1198	# this fails sometimes for no apparent reason
1199	set dx [expr {double($x-$_click(x))/$w}]
1200	set dy [expr {double($y-$_click(y))/$h}]
1201	}]} {
1202	return
1203	}
1204	if { $dx == 0 && $dy == 0 } {
1205	return
1206	}
1207	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1208	EventuallyRotate $q
1209	set _click(x) $x
1210	set _click(y) $y
1211	}
1212	}
1213	"release" {
1214	Rotate drag $x $y
1215	$itk_component(view) configure -cursor ""
1216	catch {unset _click}
1217	}
1218	default {
1219	error "bad option \"$option\": should be click, drag, release"
1220	}
1221	}
1222	}
1223
1224	itcl::body Rappture::VtkImageViewer::Pick {x y} {
1225	foreach tag [CurrentDatasets -visible] {
1226	SendCmd "dataset getscalar pixel $x $y $tag"
1227	}
1228	}
1229
1230	# ----------------------------------------------------------------------
1231	# USAGE: $this Pan click x y
1232	# $this Pan drag x y
1233	# $this Pan release x y
1234	#
1235	# Called automatically when the user clicks on one of the zoom
1236	# controls for this widget. Changes the zoom for the current view.
1237	# ----------------------------------------------------------------------
1238	itcl::body Rappture::VtkImageViewer::Pan {option x y} {
1239	switch -- $option {
1240	"set" {
1241	set w [winfo width $itk_component(view)]
1242	set h [winfo height $itk_component(view)]
1243	set x [expr $x / double($w)]
1244	set y [expr $y / double($h)]
1245	set _view(xpan) [expr $_view(xpan) + $x]
1246	set _view(ypan) [expr $_view(ypan) + $y]
1247	PanCamera
1248	return
1249	}
1250	"click" {
1251	set _click(x) $x
1252	set _click(y) $y
1253	$itk_component(view) configure -cursor hand1
1254	}
1255	"drag" {
1256	if { ![info exists _click(x)] } {
1257	set _click(x) $x
1258	}
1259	if { ![info exists _click(y)] } {
1260	set _click(y) $y
1261	}
1262	set w [winfo width $itk_component(view)]
1263	set h [winfo height $itk_component(view)]
1264	set dx [expr ($_click(x) - $x)/double($w)]
1265	set dy [expr ($_click(y) - $y)/double($h)]
1266	set _click(x) $x
1267	set _click(y) $y
1268	set _view(xpan) [expr $_view(xpan) - $dx]
1269	set _view(ypan) [expr $_view(ypan) - $dy]
1270	PanCamera
1271	}
1272	"release" {
1273	Pan drag $x $y
1274	$itk_component(view) configure -cursor ""
1275	}
1276	default {
1277	error "unknown option \"$option\": should set, click, drag, or release"
1278	}
1279	}
1280	}
1281
1282	# ----------------------------------------------------------------------
1283	# USAGE: InitSettings <what> ?<value>?
1284	#
1285	# Used internally to update rendering settings whenever parameters
1286	# change in the popup settings panel. Sends the new settings off
1287	# to the back end.
1288	# ----------------------------------------------------------------------
1289	itcl::body Rappture::VtkImageViewer::InitSettings { args } {
1290	foreach spec $args {
1291	if { [info exists _settings($_first-$spec)] } {
1292	# Reset global setting with dataobj specific setting
1293	set _settings($spec) $_settings($_first-$spec)
1294	}
1295	AdjustSetting $spec
1296	}
1297	}
1298
1299	#
1300	# AdjustSetting --
1301	#
1302	# Changes/updates a specific setting in the widget. There are
1303	# usually user-setable option. Commands are sent to the render
1304	# server.
1305	#
1306	itcl::body Rappture::VtkImageViewer::AdjustSetting {what {value ""}} {
1307	if { $_beforeConnect } {
1308	return
1309	}
1310	switch -- $what {
1311	"axisFlymode" {
1312	set mode [$itk_component(axisflymode) value]
1313	set mode [$itk_component(axisflymode) translate $mode]
1314	set _settings($what) $mode
1315	SendCmd "axis flymode $mode"
1316	}
1317	"axisLabels" {
1318	set bool $_settings($what)
1319	SendCmd "axis labels all $bool"
1320	}
1321	"axisMinorTicks" {
1322	set bool $_settings($what)
1323	foreach axis { x y z } {
1324	SendCmd "axis minticks ${axis} $bool"
1325	}
1326	}
1327	"axisVisible" {
1328	set bool $_settings($what)
1329	SendCmd "axis visible all $bool"
1330	}
1331	"axisXGrid" - "axisYGrid" - "axisZGrid" {
1332	set axis [string tolower [string range $what 4 4]]
1333	set bool $_settings($what)
1334	SendCmd "axis grid $axis $bool"
1335	}
1336	"background" {
1337	set bg [$itk_component(background) value]
1338	array set fgcolors {
1339	"black" "white"
1340	"white" "black"
1341	"grey" "black"
1342	}
1343	set fg $fgcolors($bg)
1344	configure -plotbackground $bg -plotforeground $fg
1345	$itk_component(view) delete "legend"
1346	SendCmd "screen bgcolor [Color2RGB $bg]"
1347	SendCmd "outline color [Color2RGB $fg]"
1348	SendCmd "axis color all [Color2RGB $fg]"
1349	DrawLegend
1350	}
1351	"backingColor" {
1352	set color [$itk_component(backingcolor) value]
1353	if { $color == "none" } {
1354	if { $_settings(backingVisible) } {
1355	SendCmd "image backing 0"
1356	set _settings(backingVisible) 0
1357	}
1358	} else {
1359	if { !$_settings(backingVisible) } {
1360	SendCmd "image backing 1"
1361	set _settings(backingVisible) 1
1362	}
1363	SendCmd "image color [Color2RGB $color]"
1364	}
1365	}
1366	"backingVisible" {
1367	set bool $_settings($what)
1368	SendCmd "image backing $bool"
1369	}
1370	"colormap" {
1371	set _changed($what) 1
1372	StartBufferingCommands
1373	set color [$itk_component(colormap) value]
1374	set _settings($what) $color
1375	SetCurrentColormap $color
1376	if {$_settings(colormapDiscrete)} {
1377	SendCmd "colormap res $_settings(numColors) $color"
1378	}
1379	StopBufferingCommands
1380	EventuallyRequestLegend
1381	}
1382	"colormapDiscrete" {
1383	set bool $_settings($what)
1384	StartBufferingCommands
1385	if {$bool} {
1386	SendCmd "colormap res $_settings(numColors)"
1387	} else {
1388	SendCmd "colormap res default"
1389	}
1390	StopBufferingCommands
1391	EventuallyRequestLegend
1392	}
1393	"field" {
1394	set label [$itk_component(field) value]
1395	set fname [$itk_component(field) translate $label]
1396	set _settings($what) $fname
1397	if { [info exists _fields($fname)] } {
1398	foreach { label units components } $_fields($fname) break
1399	if { $components > 1 } {
1400	set _colorMode vmag
1401	} else {
1402	set _colorMode scalar
1403	}
1404	set _curFldName $fname
1405	set _curFldLabel $label
1406	} else {
1407	puts stderr "unknown field \"$fname\""
1408	return
1409	}
1410
1411	# Get the new limits because the field changed.
1412	SendCmd "dataset scalar $_curFldName"
1413	#SendCmd "image colormode scalar $_curFldName"
1414	SendCmd "camera reset"
1415	DrawLegend
1416	}
1417	"view3D" {
1418	set bool $_settings($what)
1419	set c $itk_component(view)
1420	StartBufferingCommands
1421	# Fix image scale: 0 for contours, 1 for images.
1422	if { $bool } {
1423	set _settings(opacity) $_settings(saveOpacity)
1424	} else {
1425	set _settings(opacity) 100
1426	}
1427	AdjustSetting opacity
1428	if { $bool } {
1429	$itk_component(opacity) configure -state normal
1430	$itk_component(opacity_l) configure -state normal
1431	if {$_view(ortho)} {
1432	SendCmd "camera mode ortho"
1433	} else {
1434	SendCmd "camera mode persp"
1435	}
1436	SendCmd "camera aspect native"
1437	} else {
1438	$itk_component(opacity) configure -state disabled
1439	$itk_component(opacity_l) configure -state disabled
1440	SendCmd "camera mode image"
1441	if {$_settings(stretchToFit)} {
1442	SendCmd "camera aspect window"
1443	}
1444	}
1445	if { $bool } {
1446	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1447	$_arcball quaternion $q
1448	SendCmd "camera orient $q"
1449	} else {
1450	bind $c <ButtonPress-1> {}
1451	bind $c <B1-Motion> {}
1452	bind $c <ButtonRelease-1> {}
1453	}
1454	SendCmd "camera reset"
1455	# Fix the mouse bindings for rotation/panning and the
1456	# camera mode. Ideally we'd create a bindtag for these.
1457	if { $bool } {
1458	# Bindings for rotation via mouse
1459	bind $c <ButtonPress-1> \
1460	[itcl::code $this Rotate click %x %y]
1461	bind $c <B1-Motion> \
1462	[itcl::code $this Rotate drag %x %y]
1463	bind $c <ButtonRelease-1> \
1464	[itcl::code $this Rotate release %x %y]
1465	}
1466	StopBufferingCommands
1467	}
1468	"window" {
1469	set val $_settings($what)
1470	SendCmd "image window $val"
1471	}
1472	"level" {
1473	set val $_settings($what)
1474	SendCmd "image level $val"
1475	}
1476	"legendVisible" {
1477	if { !$_settings($what) } {
1478	$itk_component(view) delete legend
1479	}
1480	DrawLegend
1481	}
1482	"opacity" {
1483	set _changed($what) 1
1484	if { $_settings(view3D) } {
1485	set _settings(saveOpacity) $_settings($what)
1486	set val [expr $_settings($what) * 0.01]
1487	SendCmd "image opacity $val"
1488	} else {
1489	SendCmd "image opacity 1.0"
1490	}
1491	}
1492	"outline" {
1493	set bool $_settings($what)
1494	SendCmd "outline visible $bool"
1495	}
1496	"stretchToFit" {
1497	set bool $_settings($what)
1498	if { $bool } {
1499	if { $_settings(view3D) } {
1500	SendCmd "camera aspect native"
1501	} else {
1502	SendCmd "camera aspect window"
1503	}
1504	} else {
1505	SendCmd "camera aspect native"
1506	}
1507	}
1508	default {
1509	error "don't know how to fix $what"
1510	}
1511	}
1512	}
1513
1514	#
1515	# RequestLegend --
1516	#
1517	# Request a new legend from the server. The size of the legend
1518	# is determined from the height of the canvas.
1519	#
1520	# This should be called when
1521	# 1. A new current colormap is set.
1522	# 2. Window is resized.
1523	# 3. The limits of the data have changed. (Just need a redraw).
1524	# 4. Number of isolines have changed. (Just need a redraw).
1525	# 5. Legend becomes visible (Just need a redraw).
1526	#
1527	itcl::body Rappture::VtkImageViewer::RequestLegend {} {
1528	set _legendPending 0
1529	set font "Arial 8"
1530	set w 12
1531	set lineht [font metrics $font -linespace]
1532	# color ramp height = (canvas height) - (min and max value lines) - 2
1533	set h [expr {$_height - 2 * ($lineht + 2)}]
1534	set _legendHeight $h
1535
1536	set fname $_curFldName
1537	if { [string match "component*" $fname] } {
1538	set title ""
1539	} else {
1540	if { [info exists _fields($fname)] } {
1541	foreach { title units } $_fields($fname) break
1542	if { $units != "" } {
1543	set title [format "%s (%s)" $title $units]
1544	}
1545	} else {
1546	set title $fname
1547	}
1548	}
1549	# If there's a title too, substract one more line
1550	if { $title != "" } {
1551	incr h -$lineht
1552	}
1553	if { $h < 1 } {
1554	return
1555	}
1556	# Set the legend on the first image dataset.
1557	if { $_currentColormap != "" && $_currentColormap != "none" } {
1558	SendCmd "legend $_currentColormap scalar $_curFldName {} $w $h 0"
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 "outline color $rgb"
1631	SendCmd "axis color all $rgb"
1632	}
1633	}
1634	}
1635
1636	itcl::body Rappture::VtkImageViewer::limits3 { dataobj } {
1637	lappend limits x [$dataobj limits x]
1638	lappend limits y [$dataobj limits y]
1639	if { [catch { $dataobj limits $_curFldName } vlim] != 0 } {
1640	set vlim [$dataobj limits v]
1641	}
1642	lappend limits v $vlim
1643	return $limits
1644	}
1645
1646	itcl::body Rappture::VtkImageViewer::BuildImageTab {} {
1647
1648	set fg [option get $itk_component(hull) font Font]
1649	#set bfg [option get $itk_component(hull) boldFont Font]
1650
1651	set inner [$itk_component(main) insert end \
1652	-title "Image Settings" \
1653	-icon [Rappture::icon contour2]]
1654	$inner configure -borderwidth 4
1655
1656	checkbutton $inner.legend \
1657	-text "Legend" \
1658	-variable [itcl::scope _settings(legendVisible)] \
1659	-command [itcl::code $this AdjustSetting legendVisible] \
1660	-font "Arial 9"
1661
1662	checkbutton $inner.outline \
1663	-text "Outline" \
1664	-variable [itcl::scope _settings(outline)] \
1665	-command [itcl::code $this AdjustSetting outline] \
1666	-font "Arial 9"
1667
1668	checkbutton $inner.backing \
1669	-text "Backing" \
1670	-variable [itcl::scope _settings(backingVisible)] \
1671	-command [itcl::code $this AdjustSetting backingVisible] \
1672	-font "Arial 9"
1673
1674	checkbutton $inner.stretch \
1675	-text "Stretch to fit" \
1676	-variable [itcl::scope _settings(stretchToFit)] \
1677	-command [itcl::code $this AdjustSetting stretchToFit] \
1678	-font "Arial 9"
1679
1680	checkbutton $inner.colormapDiscrete \
1681	-text "Discrete Colormap" \
1682	-variable [itcl::scope _settings(colormapDiscrete)] \
1683	-command [itcl::code $this AdjustSetting colormapDiscrete] \
1684	-font "Arial 9"
1685
1686	itk_component add field_l {
1687	label $inner.field_l -text "Field" -font "Arial 9"
1688	} {
1689	ignore -font
1690	}
1691	itk_component add field {
1692	Rappture::Combobox $inner.field -width 10 -editable no
1693	}
1694	bind $inner.field <<Value>> \
1695	[itcl::code $this AdjustSetting field]
1696
1697	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1698	itk_component add colormap {
1699	Rappture::Combobox $inner.colormap -width 10 -editable no
1700	}
1701	$inner.colormap choices insert end [GetColormapList -includeNone]
1702
1703	$itk_component(colormap) value "BCGYR"
1704	bind $inner.colormap <<Value>> \
1705	[itcl::code $this AdjustSetting colormap]
1706
1707	label $inner.backingcolor_l -text "Backing Color" -font "Arial 9"
1708	itk_component add backingcolor {
1709	Rappture::Combobox $inner.backingcolor -width 10 -editable no
1710	}
1711	$inner.backingcolor choices insert end \
1712	"black" "black" \
1713	"blue" "blue" \
1714	"cyan" "cyan" \
1715	"green" "green" \
1716	"grey" "grey" \
1717	"magenta" "magenta" \
1718	"orange" "orange" \
1719	"red" "red" \
1720	"white" "white" \
1721	"none" "none"
1722
1723	$itk_component(backingcolor) value "white"
1724	bind $inner.backingcolor <<Value>> \
1725	[itcl::code $this AdjustSetting backingColor]
1726
1727	label $inner.background_l -text "Background Color" -font "Arial 9"
1728	itk_component add background {
1729	Rappture::Combobox $inner.background -width 10 -editable no
1730	}
1731	$inner.background choices insert end \
1732	"black" "black" \
1733	"white" "white" \
1734	"grey" "grey"
1735
1736	$itk_component(background) value "white"
1737	bind $inner.background <<Value>> [itcl::code $this AdjustSetting background]
1738
1739	itk_component add opacity_l {
1740	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1741	} {
1742	ignore -font
1743	}
1744	itk_component add opacity {
1745	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1746	-variable [itcl::scope _settings(opacity)] \
1747	-showvalue off \
1748	-command [itcl::code $this AdjustSetting opacity]
1749	}
1750
1751	itk_component add window_l {
1752	label $inner.window_l -text "Window" -font "Arial 9"
1753	} {
1754	ignore -font
1755	}
1756	itk_component add window {
1757	::scale $inner.window -from 0 -to 255 -orient horizontal \
1758	-variable [itcl::scope _settings(window)] \
1759	-showvalue off \
1760	-command [itcl::code $this AdjustSetting window]
1761	}
1762	itk_component add level_l {
1763	label $inner.level_l -text "Level" -font "Arial 9"
1764	} {
1765	ignore -font
1766	}
1767	itk_component add level {
1768	::scale $inner.level -from 0 -to 255 -orient horizontal \
1769	-variable [itcl::scope _settings(level)] \
1770	-showvalue off \
1771	-command [itcl::code $this AdjustSetting level]
1772	}
1773
1774	frame $inner.separator1 -height 2 -relief sunken -bd 1
1775	frame $inner.separator2 -height 2 -relief sunken -bd 1
1776
1777	blt::table $inner \
1778	0,0 $inner.field_l -anchor w -pady 2 \
1779	0,1 $inner.field -anchor w -pady 2 -fill x \
1780	1,0 $inner.colormap_l -anchor w -pady 2 \
1781	1,1 $inner.colormap -anchor w -pady 2 -fill x \
1782	2,0 $inner.backingcolor_l -anchor w -pady 2 \
1783	2,1 $inner.backingcolor -anchor w -pady 2 -fill x \
1784	3,0 $inner.background_l -anchor w -pady 2 \
1785	3,1 $inner.background -anchor w -pady 2 -fill x \
1786	4,0 $inner.backing -anchor w -pady 2 -cspan 2 \
1787	5,0 $inner.stretch -anchor w -pady 2 -cspan 2 \
1788	7,0 $inner.legend -anchor w -pady 2 -cspan 2 \
1789	8,0 $inner.colormapDiscrete -anchor w -pady 2 -cspan 2 \
1790	11,0 $inner.separator1 -padx 2 -fill x -cspan 2 \
1791	12,0 $inner.outline -anchor w -pady 2 -cspan 2 \
1792	13,0 $inner.separator2 -padx 2 -fill x -cspan 2 \
1793	15,0 $inner.opacity_l -anchor w -pady 2 \
1794	15,1 $inner.opacity -fill x -pady 2 \
1795	16,0 $inner.window_l -anchor w -pady 2 \
1796	16,1 $inner.window -fill x -pady 2 \
1797	17,0 $inner.level_l -anchor w -pady 2 \
1798	17,1 $inner.level -fill x -pady 2
1799
1800	blt::table configure $inner r* c* -resize none
1801	blt::table configure $inner r19 c1 -resize expand
1802	}
1803
1804	itcl::body Rappture::VtkImageViewer::BuildAxisTab {} {
1805
1806	set fg [option get $itk_component(hull) font Font]
1807	#set bfg [option get $itk_component(hull) boldFont Font]
1808
1809	set inner [$itk_component(main) insert end \
1810	-title "Axis Settings" \
1811	-icon [Rappture::icon axis2]]
1812	$inner configure -borderwidth 4
1813
1814	checkbutton $inner.visible \
1815	-text "Axes" \
1816	-variable [itcl::scope _settings(axisVisible)] \
1817	-command [itcl::code $this AdjustSetting axisVisible] \
1818	-font "Arial 9"
1819	checkbutton $inner.labels \
1820	-text "Axis Labels" \
1821	-variable [itcl::scope _settings(axisLabels)] \
1822	-command [itcl::code $this AdjustSetting axisLabels] \
1823	-font "Arial 9"
1824	label $inner.grid_l -text "Grid" -font "Arial 9"
1825	checkbutton $inner.xgrid \
1826	-text "X" \
1827	-variable [itcl::scope _settings(axisXGrid)] \
1828	-command [itcl::code $this AdjustSetting axisXGrid] \
1829	-font "Arial 9"
1830	checkbutton $inner.ygrid \
1831	-text "Y" \
1832	-variable [itcl::scope _settings(axisYGrid)] \
1833	-command [itcl::code $this AdjustSetting axisYGrid] \
1834	-font "Arial 9"
1835	checkbutton $inner.zgrid \
1836	-text "Z" \
1837	-variable [itcl::scope _settings(axisZGrid)] \
1838	-command [itcl::code $this AdjustSetting axisZGrid] \
1839	-font "Arial 9"
1840	checkbutton $inner.minorticks \
1841	-text "Minor Ticks" \
1842	-variable [itcl::scope _settings(axisMinorTicks)] \
1843	-command [itcl::code $this AdjustSetting axisMinorTicks] \
1844	-font "Arial 9"
1845
1846
1847	label $inner.mode_l -text "Mode" -font "Arial 9"
1848
1849	itk_component add axisflymode {
1850	Rappture::Combobox $inner.mode -width 10 -editable no
1851	}
1852	$inner.mode choices insert end \
1853	"static_triad" "static" \
1854	"closest_triad" "closest" \
1855	"furthest_triad" "farthest" \
1856	"outer_edges" "outer"
1857	$itk_component(axisflymode) value "static"
1858	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting axisFlymode]
1859
1860	blt::table $inner \
1861	0,0 $inner.visible -anchor w -cspan 4 \
1862	1,0 $inner.labels -anchor w -cspan 4 \
1863	2,0 $inner.minorticks -anchor w -cspan 4 \
1864	4,0 $inner.grid_l -anchor w \
1865	4,1 $inner.xgrid -anchor w \
1866	4,2 $inner.ygrid -anchor w \
1867	4,3 $inner.zgrid -anchor w \
1868	5,0 $inner.mode_l -anchor w -padx { 2 0 } \
1869	5,1 $inner.mode -fill x -cspan 3
1870
1871	blt::table configure $inner r* c* -resize none
1872	blt::table configure $inner r7 c6 -resize expand
1873	blt::table configure $inner r3 -height 0.125i
1874	}
1875
1876
1877	itcl::body Rappture::VtkImageViewer::BuildCameraTab {} {
1878	set inner [$itk_component(main) insert end \
1879	-title "Camera Settings" \
1880	-icon [Rappture::icon camera]]
1881	$inner configure -borderwidth 4
1882
1883	label $inner.view_l -text "view" -font "Arial 9"
1884	set f [frame $inner.view]
1885	foreach side { front back left right top bottom } {
1886	button $f.$side -image [Rappture::icon view$side] \
1887	-command [itcl::code $this SetOrientation $side]
1888	Rappture::Tooltip::for $f.$side "Change the view to $side"
1889	pack $f.$side -side left
1890	}
1891
1892	blt::table $inner \
1893	0,0 $inner.view_l -anchor e -pady 2 \
1894	0,1 $inner.view -anchor w -pady 2
1895
1896	set labels { qx qy qz qw xpan ypan zoom }
1897	set row 1
1898	foreach tag $labels {
1899	label $inner.${tag}label -text $tag -font "Arial 9"
1900	entry $inner.${tag} -font "Arial 9" -bg white \
1901	-textvariable [itcl::scope _view($tag)]
1902	bind $inner.${tag} <Return> \
1903	[itcl::code $this camera set ${tag}]
1904	bind $inner.${tag} <KP_Enter> \
1905	[itcl::code $this camera set ${tag}]
1906	blt::table $inner \
1907	$row,0 $inner.${tag}label -anchor e -pady 2 \
1908	$row,1 $inner.${tag} -anchor w -pady 2
1909	blt::table configure $inner r$row -resize none
1910	incr row
1911	}
1912	checkbutton $inner.ortho \
1913	-text "Orthographic Projection" \
1914	-variable [itcl::scope _view(ortho)] \
1915	-command [itcl::code $this camera set ortho] \
1916	-font "Arial 9"
1917	blt::table $inner \
1918	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1919	blt::table configure $inner r$row -resize none
1920	incr row
1921
1922	blt::table configure $inner c* r* -resize none
1923	blt::table configure $inner c2 -resize expand
1924	blt::table configure $inner r$row -resize expand
1925	}
1926
1927	#
1928	# camera --
1929	#
1930	itcl::body Rappture::VtkImageViewer::camera {option args} {
1931	switch -- $option {
1932	"show" {
1933	puts [array get _view]
1934	}
1935	"set" {
1936	set who [lindex $args 0]
1937	set x $_view($who)
1938	set code [catch { string is double $x } result]
1939	if { $code != 0 \|\| !$result } {
1940	return
1941	}
1942	switch -- $who {
1943	"ortho" {
1944	if {$_view(ortho)} {
1945	SendCmd "camera mode ortho"
1946	} else {
1947	SendCmd "camera mode persp"
1948	}
1949	}
1950	"xpan" - "ypan" {
1951	PanCamera
1952	}
1953	"qx" - "qy" - "qz" - "qw" {
1954	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1955	$_arcball quaternion $q
1956	EventuallyRotate $q
1957	}
1958	"zoom" {
1959	SendCmd "camera zoom $_view(zoom)"
1960	}
1961	}
1962	}
1963	}
1964	}
1965
1966	itcl::body Rappture::VtkImageViewer::GetVtkData { args } {
1967	set bytes ""
1968	foreach dataobj [get] {
1969	foreach comp [$dataobj components] {
1970	set tag $dataobj-$comp
1971	set contents [$dataobj vtkdata $comp]
1972	append bytes "$contents\n"
1973	}
1974	}
1975	return [list .vtk $bytes]
1976	}
1977
1978	itcl::body Rappture::VtkImageViewer::GetImage { args } {
1979	if { [image width $_image(download)] > 0 &&
1980	[image height $_image(download)] > 0 } {
1981	set bytes [$_image(download) data -format "jpeg -quality 100"]
1982	set bytes [Rappture::encoding::decode -as b64 $bytes]
1983	return [list .jpg $bytes]
1984	}
1985	return ""
1986	}
1987
1988	itcl::body Rappture::VtkImageViewer::BuildDownloadPopup { popup command } {
1989	Rappture::Balloon $popup \
1990	-title "[Rappture::filexfer::label downloadWord] as..."
1991	set inner [$popup component inner]
1992	label $inner.summary -text "" -anchor w
1993	radiobutton $inner.vtk_button -text "VTK data file" \
1994	-variable [itcl::scope _downloadPopup(format)] \
1995	-font "Arial 9 " \
1996	-value vtk
1997	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
1998	radiobutton $inner.image_button -text "Image File" \
1999	-variable [itcl::scope _downloadPopup(format)] \
2000	-font "Arial 9 " \
2001	-value image
2002	Rappture::Tooltip::for $inner.image_button \
2003	"Save as digital image."
2004
2005	button $inner.ok -text "Save" \
2006	-highlightthickness 0 -pady 2 -padx 3 \
2007	-command $command \
2008	-compound left \
2009	-image [Rappture::icon download]
2010
2011	button $inner.cancel -text "Cancel" \
2012	-highlightthickness 0 -pady 2 -padx 3 \
2013	-command [list $popup deactivate] \
2014	-compound left \
2015	-image [Rappture::icon cancel]
2016
2017	blt::table $inner \
2018	0,0 $inner.summary -cspan 2 \
2019	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2020	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2021	4,1 $inner.cancel -width .9i -fill y \
2022	4,0 $inner.ok -padx 2 -width .9i -fill y
2023	blt::table configure $inner r3 -height 4
2024	blt::table configure $inner r4 -pady 4
2025	raise $inner.image_button
2026	$inner.vtk_button invoke
2027	return $inner
2028	}
2029
2030	#
2031	# SetObjectStyle --
2032	#
2033	# Set the style of the image/contour object. This gets calls
2034	# for each dataset once as it is loaded. It can overridden by
2035	# the user controls.
2036	#
2037	#
2038	itcl::body Rappture::VtkImageViewer::SetObjectStyle { dataobj comp } {
2039	# Parse style string.
2040	set tag $dataobj-$comp
2041	array set style {
2042	-color none
2043	-opacity 1.0
2044	}
2045	set stylelist [$dataobj style $comp]
2046	if { $stylelist != "" } {
2047	array set style $stylelist
2048	}
2049	# This is too complicated. We want to set the colormap, number of
2050	# isolines and opacity for the dataset. They can be the default values,
2051	# the style hints loaded with the dataset, or set by user controls. As
2052	# datasets get loaded, they first use the defaults that are overidden
2053	# by the style hints. If the user changes the global controls, then that
2054	# overrides everything else. I don't know what it means when global
2055	# controls are specified as style hints by each dataset. It complicates
2056	# the code to handle aberrant cases.
2057
2058	if { $_changed(opacity) } {
2059	set style(-opacity) [expr $_settings(opacity) * 0.01]
2060	}
2061	if { $_changed(colormap) } {
2062	set style(-color) $_settings(colormap)
2063	}
2064	if { $_currentColormap == "" } {
2065	$itk_component(colormap) value $style(-color)
2066	}
2067	if { [info exists style(-stretchtofit)] } {
2068	set _settings(stretchToFit) $style(-stretchtofit)
2069	AdjustSetting stretchToFit
2070	}
2071	SendCmd "outline add $tag"
2072	SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
2073	SendCmd "outline visible $_settings(outline) $tag"
2074	SendCmd "image add $tag"
2075	SetCurrentColormap $style(-color)
2076	set color [$itk_component(backingcolor) value]
2077	SendCmd "image color [Color2RGB $color] $tag"
2078	SendCmd "image opacity $style(-opacity) $tag"
2079	set _settings(opacity) [expr $style(-opacity) * 100.0]
2080	}
2081
2082	itcl::body Rappture::VtkImageViewer::IsValidObject { dataobj } {
2083	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2084	return 0
2085	}
2086	return 1
2087	}
2088
2089	# ----------------------------------------------------------------------
2090	# USAGE: ReceiveLegend <colormap> <title> <min> <max> <size>
2091	#
2092	# Invoked automatically whenever the "legend" command comes in from
2093	# the rendering server. Indicates that binary image data with the
2094	# specified <size> will follow.
2095	# ----------------------------------------------------------------------
2096	itcl::body Rappture::VtkImageViewer::ReceiveLegend { colormap title min max size } {
2097	#puts stderr "ReceiveLegend colormap=$colormap title=$title range=$min,$max size=$size"
2098	if { [isconnected] } {
2099	set bytes [ReceiveBytes $size]
2100	if { ![info exists _image(legend)] } {
2101	set _image(legend) [image create photo]
2102	}
2103	$_image(legend) configure -data $bytes
2104	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2105	if { [catch {DrawLegend} errs] != 0 } {
2106	global errorInfo
2107	puts stderr "errs=$errs errorInfo=$errorInfo"
2108	}
2109	}
2110	}
2111
2112	#
2113	# DrawLegend --
2114	#
2115	# Draws the legend in the own canvas on the right side of the plot area.
2116	#
2117	itcl::body Rappture::VtkImageViewer::DrawLegend {} {
2118	set fname $_curFldName
2119	set c $itk_component(view)
2120	set w [winfo width $c]
2121	set h [winfo height $c]
2122	set font "Arial 8"
2123	set lineht [font metrics $font -linespace]
2124
2125	if { [string match "component*" $fname] } {
2126	set title ""
2127	} else {
2128	if { [info exists _fields($fname)] } {
2129	foreach { title units } $_fields($fname) break
2130	if { $units != "" } {
2131	set title [format "%s (%s)" $title $units]
2132	}
2133	} else {
2134	set title $fname
2135	}
2136	}
2137	set x [expr $w - 2]
2138	if { !$_settings(legendVisible) } {
2139	$c delete legend
2140	return
2141	}
2142	if { [$c find withtag "legend"] == "" } {
2143	set y 2
2144	# If there's a legend title, create a text item for the title.
2145	$c create text $x $y \
2146	-anchor ne \
2147	-fill $itk_option(-plotforeground) -tags "title legend" \
2148	-font $font
2149	if { $title != "" } {
2150	incr y $lineht
2151	}
2152	$c create text $x $y \
2153	-anchor ne \
2154	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2155	-font $font
2156	incr y $lineht
2157	$c create image $x $y \
2158	-anchor ne \
2159	-image $_image(legend) -tags "colormap legend"
2160	$c create rectangle $x $y 1 1 \
2161	-fill "" -outline "" -tags "sensor legend"
2162	$c create text $x [expr {$h-2}] \
2163	-anchor se \
2164	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2165	-font $font
2166	$c bind sensor <Enter> [itcl::code $this EnterLegend %x %y]
2167	$c bind sensor <Leave> [itcl::code $this LeaveLegend]
2168	$c bind sensor <Motion> [itcl::code $this MotionLegend %x %y]
2169	}
2170
2171	set x2 $x
2172	set iw [image width $_image(legend)]
2173	set ih [image height $_image(legend)]
2174	set x1 [expr $x2 - ($iw*12)/10]
2175
2176	$c bind title <ButtonPress> [itcl::code $this Combo post]
2177	$c bind title <Enter> [itcl::code $this Combo activate]
2178	$c bind title <Leave> [itcl::code $this Combo deactivate]
2179	# Reset the item coordinates according the current size of the plot.
2180	if { [info exists _limits($_curFldName)] } {
2181	foreach { vmin vmax } $_limits($_curFldName) break
2182	$c itemconfigure vmin -text [format %g $vmin]
2183	$c itemconfigure vmax -text [format %g $vmax]
2184	}
2185	set y 2
2186	# If there's a legend title, move the title to the correct position
2187	if { $title != "" } {
2188	$c itemconfigure title -text $title
2189	$c coords title $x $y
2190	incr y $lineht
2191	}
2192	$c coords vmax $x $y
2193	incr y $lineht
2194	$c coords colormap $x $y
2195	$c coords sensor [expr $x - $iw] $y $x [expr $y + $ih]
2196	$c raise sensor
2197	$c coords vmin $x [expr {$h - 2}]
2198	}
2199
2200	#
2201	# EnterLegend --
2202	#
2203	itcl::body Rappture::VtkImageViewer::EnterLegend { x y } {
2204	SetLegendTip $x $y
2205	}
2206
2207	#
2208	# MotionLegend --
2209	#
2210	itcl::body Rappture::VtkImageViewer::MotionLegend { x y } {
2211	Rappture::Tooltip::tooltip cancel
2212	set c $itk_component(view)
2213	set cw [winfo width $c]
2214	set ch [winfo height $c]
2215	if { $x >= 0 && $x < $cw && $y >= 0 && $y < $ch } {
2216	SetLegendTip $x $y
2217	}
2218	}
2219
2220	#
2221	# LeaveLegend --
2222	#
2223	itcl::body Rappture::VtkImageViewer::LeaveLegend { } {
2224	Rappture::Tooltip::tooltip cancel
2225	.rappturetooltip configure -icon ""
2226	}
2227
2228	#
2229	# SetLegendTip --
2230	#
2231	itcl::body Rappture::VtkImageViewer::SetLegendTip { x y } {
2232	set fname $_curFldName
2233	set c $itk_component(view)
2234	set w [winfo width $c]
2235	set h [winfo height $c]
2236	set font "Arial 8"
2237	set lineht [font metrics $font -linespace]
2238
2239	set ih [image height $_image(legend)]
2240	# Subtract off the offset of the color ramp from the top of the canvas
2241	set iy [expr $y - ($lineht + 2)]
2242
2243	if { [string match "component*" $fname] } {
2244	set title ""
2245	} else {
2246	if { [info exists _fields($fname)] } {
2247	foreach { title units } $_fields($fname) break
2248	if { $units != "" } {
2249	set title [format "%s (%s)" $title $units]
2250	}
2251	} else {
2252	set title $fname
2253	}
2254	}
2255	# If there's a legend title, increase the offset by the line height.
2256	if { $title != "" } {
2257	incr iy -$lineht
2258	}
2259
2260	# Make a swatch of the selected color
2261	if { [catch { $_image(legend) get 10 $iy } pixel] != 0 } {
2262	return
2263	}
2264
2265	if { ![info exists _image(swatch)] } {
2266	set _image(swatch) [image create photo -width 24 -height 24]
2267	}
2268	set color [eval format "\#%02x%02x%02x" $pixel]
2269	$_image(swatch) put black -to 0 0 23 23
2270	$_image(swatch) put $color -to 1 1 22 22
2271
2272	# Compute the value of the point
2273	if { [info exists _limits($fname)] } {
2274	foreach { vmin vmax } $_limits($fname) break
2275	set t [expr 1.0 - (double($iy) / double($ih-1))]
2276	set value [expr $t * ($vmax - $vmin) + $vmin]
2277	} else {
2278	set value 0.0
2279	}
2280	set tipx [expr $x + 15]
2281	set tipy [expr $y - 5]
2282	.rappturetooltip configure -icon $_image(swatch)
2283	if { [info exists _isolines($y)] } {
2284	Rappture::Tooltip::text $c [format "$title %g (isoline)" $_isolines($y)]
2285	} else {
2286	Rappture::Tooltip::text $c [format "$title %g" $value]
2287	}
2288	Rappture::Tooltip::tooltip show $c +$tipx,+$tipy
2289	}
2290
2291	# ----------------------------------------------------------------------
2292	# USAGE: _dropdown post
2293	# USAGE: _dropdown unpost
2294	# USAGE: _dropdown select
2295	#
2296	# Used internally to handle the dropdown list for this combobox. The
2297	# post/unpost options are invoked when the list is posted or unposted
2298	# to manage the relief of the controlling button. The select option
2299	# is invoked whenever there is a selection from the list, to assign
2300	# the value back to the gauge.
2301	# ----------------------------------------------------------------------
2302	itcl::body Rappture::VtkImageViewer::Combo {option} {
2303	set c $itk_component(view)
2304	switch -- $option {
2305	post {
2306	foreach { x1 y1 x2 y2 } [$c bbox title] break
2307	set x1 [expr [winfo width $itk_component(view)] - [winfo reqwidth $itk_component(fieldmenu)]]
2308	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2309	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2310	tk_popup $itk_component(fieldmenu) $x $y
2311	}
2312	activate {
2313	$c itemconfigure title -fill red
2314	}
2315	deactivate {
2316	$c itemconfigure title -fill $itk_option(-plotforeground)
2317	}
2318	invoke {
2319	$itk_component(field) value $_curFldLabel
2320	AdjustSetting field
2321	}
2322	default {
2323	error "bad option \"$option\": should be post, unpost, select"
2324	}
2325	}
2326	}
2327
2328	itcl::body Rappture::VtkImageViewer::SetOrientation { side } {
2329	array set positions {
2330	front "0.707107 0.707107 0 0"
2331	back "0 0 0.707107 0.707107"
2332	left "0.5 0.5 -0.5 -0.5"
2333	right "0.5 0.5 0.5 0.5"
2334	top "1 0 0 0"
2335	bottom "0 1 0 0"
2336	}
2337	foreach name { qw qx qy qz } value $positions($side) {
2338	set _view($name) $value
2339	}
2340	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2341	$_arcball quaternion $q
2342	SendCmd "camera orient $q"
2343	SendCmd "camera reset"
2344	set _view(xpan) 0
2345	set _view(ypan) 0
2346	set _view(zoom) 1.0
2347	}

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