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source: trunk/gui/scripts/vtkheightmapviewer.tcl @ 3733

Last change on this file since 3733 was 3733, checked in by gah, 11 years ago
add octave/MATLAB version of example
File size: 86.4 KB

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1	# -- mode: tcl; indent-tabs-mode: nil --
2	# ----------------------------------------------------------------------
3	# COMPONENT: vtkheightmapviewer - Vtk heightmap 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) 2004-2012 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 *VtkHeightmapViewer.width 4i widgetDefault
19	option add VtkHeightmapViewercursor crosshair widgetDefault
20	option add *VtkHeightmapViewer.height 4i widgetDefault
21	option add *VtkHeightmapViewer.foreground black widgetDefault
22	option add *VtkHeightmapViewer.controlBackground gray widgetDefault
23	option add *VtkHeightmapViewer.controlDarkBackground #999999 widgetDefault
24	option add *VtkHeightmapViewer.plotBackground black widgetDefault
25	option add *VtkHeightmapViewer.plotForeground white widgetDefault
26	option add *VtkHeightmapViewer.font \
27	--helvetica-medium-r-normal--12-* widgetDefault
28
29	# must use this name -- plugs into Rappture::resources::load
30	proc VtkHeightmapViewer_init_resources {} {
31	Rappture::resources::register \
32	vtkvis_server Rappture::VtkHeightmapViewer::SetServerList
33	}
34
35	itcl::class Rappture::VtkHeightmapViewer {
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 "contour"
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 BuildContourTab {}
88	private method BuildDownloadPopup { widget command }
89	private method Combo { option }
90	private method ConvertToVtkData { dataobj comp }
91	private method DrawLegend {}
92	private method EnterLegend { x y }
93	private method EventuallyRequestLegend {}
94	private method EventuallyResize { w h }
95	private method EventuallyRotate { q }
96	private method GetImage { args }
97	private method GetVtkData { args }
98	private method IsValidObject { dataobj }
99	private method LeaveLegend {}
100	private method MotionLegend { x y }
101	private method PanCamera {}
102	private method RequestLegend {}
103	private method SetCurrentColormap { color }
104	private method SetLegendTip { x y }
105	private method SetObjectStyle { dataobj comp }
106	private method GetHeightmapScale {}
107	private method ResetAxes {}
108	private method SetOrientation { side }
109	private method UpdateContourList {}
110
111	private variable _arcball ""
112	private variable _dlist "" ; # list of data objects
113	private variable _obj2datasets
114	private variable _obj2ovride ; # maps dataobj => style override
115	private variable _comp2scale; # maps dataset to the heightmap scale.
116	private variable _datasets ; # contains all the dataobj-component
117	; # datasets in the server
118	private variable _colormaps ; # contains all the colormaps
119	; # in the server.
120
121	# The name of the current colormap used. The colormap is global to all
122	# heightmaps displayed.
123	private variable _currentColormap ""
124	private variable _currentNumIsolines -1
125	private variable _currentOpacity ""
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 "vmag";# Mode of colormap (vmag or scalar)
158	}
159
160	itk::usual VtkHeightmapViewer {
161	keep -background -foreground -cursor -font
162	keep -plotbackground -plotforeground -mode
163	}
164
165	# ----------------------------------------------------------------------
166	# CONSTRUCTOR
167	# ----------------------------------------------------------------------
168	itcl::body Rappture::VtkHeightmapViewer::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	axisMinorTicks 1
216	stretchToFit 0
217	axisLabels 1
218	axisVisible 1
219	axisXGrid 0
220	axisYGrid 0
221	axisZGrid 0
222	colormapVisible 1
223	colormapDiscrete 0
224	edges 0
225	field "Default"
226	heightmapScale 50
227	isHeightmap 0
228	isolineColor black
229	isolinesVisible 1
230	legendVisible 1
231	lighting 1
232	saveLighting 1
233	numIsolines 10
234	opacity 100
235	outline 0
236	wireframe 0
237	saveOpacity 100
238	saveOutline 0
239	}
240	array set _changed {
241	opacity 0
242	colormap 0
243	numIsolines 0
244	}
245	itk_component add view {
246	canvas $itk_component(plotarea).view \
247	-highlightthickness 0 -borderwidth 0
248	} {
249	usual
250	ignore -highlightthickness -borderwidth -background
251	}
252
253	itk_component add fieldmenu {
254	menu $itk_component(plotarea).menu \
255	-relief flat \
256	-tearoff no
257	} {
258	usual
259	ignore -background -foreground -relief -tearoff
260	}
261	set c $itk_component(view)
262	bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
263	bind $c <4> [itcl::code $this Zoom in 0.25]
264	bind $c <5> [itcl::code $this Zoom out 0.25]
265	bind $c <KeyPress-Left> [list %W xview scroll 10 units]
266	bind $c <KeyPress-Right> [list %W xview scroll -10 units]
267	bind $c <KeyPress-Up> [list %W yview scroll 10 units]
268	bind $c <KeyPress-Down> [list %W yview scroll -10 units]
269	bind $c <Enter> "focus %W"
270	bind $c <Control-F1> [itcl::code $this ToggleConsole]
271
272	# Fix the scrollregion in case we go off screen
273	$c configure -scrollregion [$c bbox all]
274
275	set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
276	set _map(cwidth) -1
277	set _map(cheight) -1
278	set _map(zoom) 1.0
279	set _map(original) ""
280
281	set f [$itk_component(main) component controls]
282	itk_component add reset {
283	button $f.reset -borderwidth 1 -padx 1 -pady 1 \
284	-highlightthickness 0 \
285	-image [Rappture::icon reset-view] \
286	-command [itcl::code $this Zoom reset]
287	} {
288	usual
289	ignore -highlightthickness
290	}
291	pack $itk_component(reset) -side top -padx 2 -pady 2
292	Rappture::Tooltip::for $itk_component(reset) "Reset the view to the default zoom level"
293
294	itk_component add zoomin {
295	button $f.zin -borderwidth 1 -padx 1 -pady 1 \
296	-highlightthickness 0 \
297	-image [Rappture::icon zoom-in] \
298	-command [itcl::code $this Zoom in]
299	} {
300	usual
301	ignore -highlightthickness
302	}
303	pack $itk_component(zoomin) -side top -padx 2 -pady 2
304	Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
305
306	itk_component add zoomout {
307	button $f.zout -borderwidth 1 -padx 1 -pady 1 \
308	-highlightthickness 0 \
309	-image [Rappture::icon zoom-out] \
310	-command [itcl::code $this Zoom out]
311	} {
312	usual
313	ignore -highlightthickness
314	}
315	pack $itk_component(zoomout) -side top -padx 2 -pady 2
316	Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
317
318	itk_component add mode {
319	Rappture::PushButton $f.mode \
320	-onimage [Rappture::icon surface] \
321	-offimage [Rappture::icon surface] \
322	-variable [itcl::scope _settings(isHeightmap)] \
323	-command [itcl::code $this AdjustSetting isHeightmap] \
324	}
325	Rappture::Tooltip::for $itk_component(mode) \
326	"Toggle the surface/contour on/off"
327	pack $itk_component(mode) -padx 2 -pady 2
328
329	if { [catch {
330	BuildContourTab
331	BuildAxisTab
332	BuildCameraTab
333	} errs] != 0 } {
334	global errorInfo
335	puts stderr "errs=$errs errorInfo=$errorInfo"
336	}
337
338	# Hack around the Tk panewindow. The problem is that the requested
339	# size of the 3d view isn't set until an image is retrieved from
340	# the server. So the panewindow uses the tiny size.
341	set w 10000
342	pack forget $itk_component(view)
343	blt::table $itk_component(plotarea) \
344	0,0 $itk_component(view) -fill both -reqwidth $w
345	blt::table configure $itk_component(plotarea) c1 -resize none
346
347	# Bindings for panning via mouse
348	bind $itk_component(view) <ButtonPress-2> \
349	[itcl::code $this Pan click %x %y]
350	bind $itk_component(view) <B2-Motion> \
351	[itcl::code $this Pan drag %x %y]
352	bind $itk_component(view) <ButtonRelease-2> \
353	[itcl::code $this Pan release %x %y]
354
355	#bind $itk_component(view) <ButtonRelease-3> \
356	# [itcl::code $this Pick %x %y]
357
358	# Bindings for panning via keyboard
359	bind $itk_component(view) <KeyPress-Left> \
360	[itcl::code $this Pan set -10 0]
361	bind $itk_component(view) <KeyPress-Right> \
362	[itcl::code $this Pan set 10 0]
363	bind $itk_component(view) <KeyPress-Up> \
364	[itcl::code $this Pan set 0 -10]
365	bind $itk_component(view) <KeyPress-Down> \
366	[itcl::code $this Pan set 0 10]
367	bind $itk_component(view) <Shift-KeyPress-Left> \
368	[itcl::code $this Pan set -2 0]
369	bind $itk_component(view) <Shift-KeyPress-Right> \
370	[itcl::code $this Pan set 2 0]
371	bind $itk_component(view) <Shift-KeyPress-Up> \
372	[itcl::code $this Pan set 0 -2]
373	bind $itk_component(view) <Shift-KeyPress-Down> \
374	[itcl::code $this Pan set 0 2]
375
376	# Bindings for zoom via keyboard
377	bind $itk_component(view) <KeyPress-Prior> \
378	[itcl::code $this Zoom out]
379	bind $itk_component(view) <KeyPress-Next> \
380	[itcl::code $this Zoom in]
381
382	bind $itk_component(view) <Enter> "focus $itk_component(view)"
383
384	if {[string equal "x11" [tk windowingsystem]]} {
385	# Bindings for zoom via mouse
386	bind $itk_component(view) <4> [itcl::code $this Zoom out]
387	bind $itk_component(view) <5> [itcl::code $this Zoom in]
388	}
389
390	set _image(download) [image create photo]
391	puts stderr "args=$args"
392	eval itk_initialize $args
393	Connect
394	set _beforeConnect 0
395	}
396
397	# ----------------------------------------------------------------------
398	# DESTRUCTOR
399	# ----------------------------------------------------------------------
400	itcl::body Rappture::VtkHeightmapViewer::destructor {} {
401	Disconnect
402	image delete $_image(plot)
403	image delete $_image(download)
404	catch { blt::arcball destroy $_arcball }
405	}
406
407	itcl::body Rappture::VtkHeightmapViewer::DoResize {} {
408	if { $_width < 2 } {
409	set _width 500
410	}
411	if { $_height < 2 } {
412	set _height 500
413	}
414	set _start [clock clicks -milliseconds]
415	SendCmd "screen size [expr $_width - 20] $_height"
416
417	set font "Arial 8"
418	set lh [font metrics $font -linespace]
419	set h [expr {$_height - 2 * ($lh + 2)}]
420	if { $h != $_legendHeight } {
421	EventuallyRequestLegend
422	} else {
423	DrawLegend
424	}
425	set _resizePending 0
426	}
427
428	itcl::body Rappture::VtkHeightmapViewer::DoRotate {} {
429	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
430	SendCmd "camera orient $q"
431	set _rotatePending 0
432	}
433
434	itcl::body Rappture::VtkHeightmapViewer::EventuallyRequestLegend {} {
435	if { !$_legendPending } {
436	set _legendPending 1
437	$_dispatcher event -idle !legend
438	}
439	}
440
441	itcl::body Rappture::VtkHeightmapViewer::EventuallyResize { w h } {
442	set _width $w
443	set _height $h
444	$_arcball resize $w $h
445	if { !$_resizePending } {
446	set _resizePending 1
447	$_dispatcher event -after 250 !resize
448	}
449	}
450
451	set rotate_delay 100
452
453	itcl::body Rappture::VtkHeightmapViewer::EventuallyRotate { q } {
454	foreach { _view(qw) _view(qx) _view(qy) _view(qz) } $q break
455	if { !$_rotatePending } {
456	set _rotatePending 1
457	global rotate_delay
458	$_dispatcher event -after $rotate_delay !rotate
459	}
460	}
461
462	# ----------------------------------------------------------------------
463	# USAGE: add <dataobj> ?<settings>?
464	#
465	# Clients use this to add a data object to the plot. The optional
466	# <settings> are used to configure the plot. Allowed settings are
467	# -color, -brightness, -width, -linestyle, and -raise.
468	# ----------------------------------------------------------------------
469	itcl::body Rappture::VtkHeightmapViewer::add {dataobj {settings ""}} {
470	if { ![$dataobj isvalid] } {
471	return; # Object doesn't contain valid data.
472	}
473	array set params {
474	-color auto
475	-width 1
476	-linestyle solid
477	-brightness 0
478	-raise 0
479	-description ""
480	-param ""
481	-type ""
482	}
483	array set params $settings
484	set params(-description) ""
485	set params(-param) ""
486	foreach {opt val} $settings {
487	if {![info exists params($opt)]} {
488	error "bad setting \"$opt\": should be [join [lsort [array names params]] {, }]"
489	}
490	set params($opt) $val
491	}
492	if {$params(-color) == "auto" \|\| $params(-color) == "autoreset"} {
493	# can't handle -autocolors yet
494	set params(-color) white
495	}
496	set pos [lsearch -exact $dataobj $_dlist]
497	if {$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::VtkHeightmapViewer::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	# Append to the end of the dataobj list.
531	#lappend _dlist $dataobj
532	set changed 1
533	}
534	# If anything changed, then rebuild the plot
535	if { $changed } {
536	$_dispatcher event -idle !rebuild
537	}
538	}
539
540	# ----------------------------------------------------------------------
541	# USAGE: get ?-objects?
542	# USAGE: get ?-visible?
543	# USAGE: get ?-image view?
544	#
545	# Clients use this to query the list of objects being plotted, in
546	# order from bottom to top of this result. The optional "-image"
547	# flag can also request the internal images being shown.
548	# ----------------------------------------------------------------------
549	itcl::body Rappture::VtkHeightmapViewer::get {args} {
550	if {[llength $args] == 0} {
551	set args "-objects"
552	}
553	set op [lindex $args 0]
554	switch -- $op {
555	"-objects" {
556	# put the dataobj list in order according to -raise options
557	set dlist {}
558	foreach dataobj $_dlist {
559	if { ![IsValidObject $dataobj] } {
560	continue
561	}
562	if {[info exists _obj2ovride($dataobj-raise)] &&
563	$_obj2ovride($dataobj-raise)} {
564	set dlist [linsert $dlist 0 $dataobj]
565	} else {
566	lappend dlist $dataobj
567	}
568	}
569	return $dlist
570	}
571	"-visible" {
572	set dlist {}
573	foreach dataobj $_dlist {
574	if { ![IsValidObject $dataobj] } {
575	continue
576	}
577	if { ![info exists _obj2ovride($dataobj-raise)] } {
578	# No setting indicates that the object isn't visible.
579	continue
580	}
581	# Otherwise use the -raise parameter to put the object to
582	# the front of the list.
583	if { $_obj2ovride($dataobj-raise) } {
584	set dlist [linsert $dlist 0 $dataobj]
585	} else {
586	lappend dlist $dataobj
587	}
588	}
589	return $dlist
590	}
591	-image {
592	if {[llength $args] != 2} {
593	error "wrong # args: should be \"get -image view\""
594	}
595	switch -- [lindex $args end] {
596	view {
597	return $_image(plot)
598	}
599	default {
600	error "bad image name \"[lindex $args end]\": should be view"
601	}
602	}
603	}
604	default {
605	error "bad option \"$op\": should be -objects or -image"
606	}
607	}
608	}
609
610	#
611	# scale --
612	#
613	# This gets called either incrementally as new simulations are
614	# added or all at once as a sequence of heightmaps.
615	# This accounts for all objects--even those not showing on the
616	# screen. Because of this, the limits are appropriate for all
617	# objects as the user scans through data in the ResultSet viewer.
618	#
619	itcl::body Rappture::VtkHeightmapViewer::scale {args} {
620	foreach dataobj $args {
621	if { ![$dataobj isvalid] } {
622	continue; # Object doesn't contain valid data.
623	}
624	foreach axis { x y } {
625	set lim [$dataobj limits $axis]
626	if { ![info exists _limits($axis)] } {
627	set _limits($axis) $lim
628	continue
629	}
630	foreach {min max} $lim break
631	foreach {amin amax} $_limits($axis) break
632	if { $amin > $min } {
633	set amin $min
634	}
635	if { $amax < $max } {
636	set amax $max
637	}
638	set _limits($axis) [list $amin $amax]
639	}
640	foreach { fname lim } [$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	}
657
658	# ----------------------------------------------------------------------
659	# USAGE: download coming
660	# USAGE: download controls <downloadCommand>
661	# USAGE: download now
662	#
663	# Clients use this method to create a downloadable representation
664	# of the plot. Returns a list of the form {ext string}, where
665	# "ext" is the file extension (indicating the type of data) and
666	# "string" is the data itself.
667	# ----------------------------------------------------------------------
668	itcl::body Rappture::VtkHeightmapViewer::download {option args} {
669	switch $option {
670	coming {
671	if {[catch {
672	blt::winop snap $itk_component(plotarea) $_image(download)
673	}]} {
674	$_image(download) configure -width 1 -height 1
675	$_image(download) put #000000
676	}
677	}
678	controls {
679	set popup .vtkviewerdownload
680	if { ![winfo exists .vtkviewerdownload] } {
681	set inner [BuildDownloadPopup $popup [lindex $args 0]]
682	} else {
683	set inner [$popup component inner]
684	}
685	set _downloadPopup(image_controls) $inner.image_frame
686	set num [llength [get]]
687	set num [expr {($num == 1) ? "1 result" : "$num results"}]
688	set word [Rappture::filexfer::label downloadWord]
689	$inner.summary configure -text "$word $num in the following format:"
690	update idletasks ;# Fix initial sizes
691	return $popup
692	}
693	now {
694	set popup .vtkviewerdownload
695	if {[winfo exists .vtkviewerdownload]} {
696	$popup deactivate
697	}
698	switch -- $_downloadPopup(format) {
699	"image" {
700	return [$this GetImage [lindex $args 0]]
701	}
702	"vtk" {
703	return [$this GetVtkData [lindex $args 0]]
704	}
705	}
706	return ""
707	}
708	default {
709	error "bad option \"$option\": should be coming, controls, now"
710	}
711	}
712	}
713
714	# ----------------------------------------------------------------------
715	# USAGE: Connect ?<host:port>,<host:port>...?
716	#
717	# Clients use this method to establish a connection to a new
718	# server, or to reestablish a connection to the previous server.
719	# Any existing connection is automatically closed.
720	# ----------------------------------------------------------------------
721	itcl::body Rappture::VtkHeightmapViewer::Connect {} {
722	global readyForNextFrame
723	set readyForNextFrame 1
724	set _reset 1
725	set _hosts [GetServerList "vtkvis"]
726	if { "" == $_hosts } {
727	return 0
728	}
729	set result [VisViewer::Connect $_hosts]
730	if { $result } {
731	if { $_reportClientInfo } {
732	# Tell the server the viewer, hub, user and session.
733	# Do this immediately on connect before buffing any commands
734	global env
735
736	set info {}
737	set user "???"
738	if { [info exists env(USER)] } {
739	set user $env(USER)
740	}
741	set session "???"
742	if { [info exists env(SESSION)] } {
743	set session $env(SESSION)
744	}
745	lappend info "hub" [exec hostname]
746	lappend info "client" "vtkheightmapviewer"
747	lappend info "user" $user
748	lappend info "session" $session
749	SendCmd "clientinfo [list $info]"
750	}
751	set w [winfo width $itk_component(view)]
752	set h [winfo height $itk_component(view)]
753	EventuallyResize $w $h
754	}
755	return $result
756	}
757
758	#
759	# isconnected --
760	#
761	# Indicates if we are currently connected to the visualization server.
762	#
763	itcl::body Rappture::VtkHeightmapViewer::isconnected {} {
764	return [VisViewer::IsConnected]
765	}
766
767	#
768	# disconnect --
769	#
770	itcl::body Rappture::VtkHeightmapViewer::disconnect {} {
771	Disconnect
772	set _reset 1
773	}
774
775	#
776	# Disconnect --
777	#
778	# Clients use this method to disconnect from the current rendering
779	# server.
780	#
781	itcl::body Rappture::VtkHeightmapViewer::Disconnect {} {
782	VisViewer::Disconnect
783
784	$_dispatcher cancel !rebuild
785	$_dispatcher cancel !resize
786	$_dispatcher cancel !rotate
787	$_dispatcher cancel !legend
788	# disconnected -- no more data sitting on server
789	array unset _datasets
790	array unset _data
791	array unset _colormaps
792	array unset _obj2datasets
793	global readyForNextFrame
794	set readyForNextFrame 1
795	}
796
797	# ----------------------------------------------------------------------
798	# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
799	#
800	# Invoked automatically whenever the "image" command comes in from
801	# the rendering server. Indicates that binary image data with the
802	# specified <size> will follow.
803	# ----------------------------------------------------------------------
804	itcl::body Rappture::VtkHeightmapViewer::ReceiveImage { args } {
805	global readyForNextFrame
806	set readyForNextFrame 1
807	array set info {
808	-token "???"
809	-bytes 0
810	-type image
811	}
812	array set info $args
813	set bytes [ReceiveBytes $info(-bytes)]
814	if { $info(-type) == "image" } {
815	if 0 {
816	set f [open "last.ppm" "w"]
817	puts $f $bytes
818	close $f
819	}
820	$_image(plot) configure -data $bytes
821	set time [clock seconds]
822	set date [clock format $time]
823	#puts stderr "$date: received image [image width $_image(plot)]x[image height $_image(plot)] image>"
824	if { $_start > 0 } {
825	set finish [clock clicks -milliseconds]
826	#puts stderr "round trip time [expr $finish -$_start] milliseconds"
827	set _start 0
828	}
829	} elseif { $info(type) == "print" } {
830	set tag $this-print-$info(-token)
831	set _hardcopy($tag) $bytes
832	}
833	}
834
835	#
836	# ReceiveDataset --
837	#
838	itcl::body Rappture::VtkHeightmapViewer::ReceiveDataset { args } {
839	if { ![isconnected] } {
840	return
841	}
842	set option [lindex $args 0]
843	switch -- $option {
844	"scalar" {
845	set option [lindex $args 1]
846	switch -- $option {
847	"world" {
848	foreach { x y z value tag } [lrange $args 2 end] break
849	}
850	"pixel" {
851	foreach { x y value tag } [lrange $args 2 end] break
852	}
853	}
854	}
855	"vector" {
856	set option [lindex $args 1]
857	switch -- $option {
858	"world" {
859	foreach { x y z vx vy vz tag } [lrange $args 2 end] break
860	}
861	"pixel" {
862	foreach { x y vx vy vz tag } [lrange $args 2 end] break
863	}
864	}
865	}
866	"names" {
867	foreach { name } [lindex $args 1] {
868	#puts stderr "Dataset: $name"
869	}
870	}
871	default {
872	error "unknown dataset option \"$option\" from server"
873	}
874	}
875	}
876
877	# ----------------------------------------------------------------------
878	# USAGE: Rebuild
879	#
880	# Called automatically whenever something changes that affects the
881	# data in the widget. Clears any existing data and rebuilds the
882	# widget to display new data.
883	# ----------------------------------------------------------------------
884	itcl::body Rappture::VtkHeightmapViewer::Rebuild {} {
885	set w [winfo width $itk_component(view)]
886	set h [winfo height $itk_component(view)]
887	if { $w < 2 \|\| $h < 2 } {
888	$_dispatcher event -idle !rebuild
889	return
890	}
891
892	# Turn on buffering of commands to the server. We don't want to
893	# be preempted by a server disconnect/reconnect (which automatically
894	# generates a new call to Rebuild).
895	StartBufferingCommands
896
897	if { $_width != $w \|\| $_height != $h \|\| $_reset } {
898	set _width $w
899	set _height $h
900	$_arcball resize $w $h
901	DoResize
902	if { $_settings(stretchToFit) } {
903	AdjustSetting stretchToFit
904	}
905	}
906	if { $_reset } {
907	#
908	# Reset the camera and other view parameters
909	#
910	InitSettings isHeightmap background
911
912	# Let's see how this goes. I think it's preferable to overloading the
913	# axis title with the exponent.
914	SendCmd "axis exp 0 0 0 1"
915
916	SendCmd "axis lrot z 90"
917	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
918	$_arcball quaternion $q
919	if {$_settings(isHeightmap) } {
920	if { $_view(ortho)} {
921	SendCmd "camera mode ortho"
922	} else {
923	SendCmd "camera mode persp"
924	}
925	DoRotate
926	SendCmd "camera reset"
927	}
928	PanCamera
929	StopBufferingCommands
930	SendCmd "imgflush"
931	StartBufferingCommands
932	}
933
934	set _first ""
935	# Start off with no datasets are visible.
936	SendCmd "dataset visible 0"
937	set scale [GetHeightmapScale]
938	foreach dataobj [get -objects] {
939	if { [info exists _obj2ovride($dataobj-raise)] && $_first == "" } {
940	set _first $dataobj
941	}
942	set _obj2datasets($dataobj) ""
943	foreach comp [$dataobj components] {
944	set tag $dataobj-$comp
945	if { ![info exists _datasets($tag)] } {
946	set bytes [$dataobj vtkdata $comp]
947	if 0 {
948	set f [open /tmp/vtkheightmap.vtk "w"]
949	puts $f $bytes
950	close $f
951	}
952	set length [string length $bytes]
953	if { $_reportClientInfo } {
954	set info {}
955	lappend info "tool_id" [$dataobj hints toolId]
956	lappend info "tool_name" [$dataobj hints toolName]
957	lappend info "tool_version" [$dataobj hints toolRevision]
958	lappend info "tool_title" [$dataobj hints toolTitle]
959	lappend info "dataset_label" [$dataobj hints label]
960	lappend info "dataset_size" $length
961	lappend info "dataset_tag" $tag
962	SendCmd [list "clientinfo" $info]
963	}
964	SendCmd "dataset add $tag data follows $length"
965	append _outbuf $bytes
966	set _datasets($tag) 1
967	SetObjectStyle $dataobj $comp
968	}
969	lappend _obj2datasets($dataobj) $tag
970	if { [info exists _obj2ovride($dataobj-raise)] } {
971	# Setting dataset visible enables outline
972	# and heightmap
973	SendCmd "dataset visible 1 $tag"
974	}
975	if { ![info exists _comp2scale($tag)] \|\|
976	$_comp2scale($tag) != $scale } {
977	SendCmd "heightmap heightscale $scale $tag"
978	set _comp2scale($tag) $scale
979	}
980	}
981	}
982	if { $_first != "" } {
983	$itk_component(field) choices delete 0 end
984	$itk_component(fieldmenu) delete 0 end
985	array unset _fields
986	set _curFldName ""
987	foreach cname [$_first components] {
988	foreach fname [$_first fieldnames $cname] {
989	if { [info exists _fields($fname)] } {
990	continue
991	}
992	foreach { label units components } \
993	[$_first fieldinfo $fname] break
994	$itk_component(field) choices insert end "$fname" "$label"
995	$itk_component(fieldmenu) add radiobutton -label "$label" \
996	-value $label -variable [itcl::scope _curFldLabel] \
997	-selectcolor red \
998	-activebackground $itk_option(-plotbackground) \
999	-activeforeground $itk_option(-plotforeground) \
1000	-font "Arial 8" \
1001	-command [itcl::code $this Combo invoke]
1002	set _fields($fname) [list $label $units $components]
1003	if { $_curFldName == "" } {
1004	set _curFldName $fname
1005	set _curFldLabel $label
1006	}
1007	}
1008	}
1009	$itk_component(field) value $_curFldLabel
1010	}
1011	InitSettings stretchToFit outline
1012
1013	if { $_reset } {
1014	SendCmd "axis tickpos outside"
1015	foreach axis { x y z } {
1016	SendCmd "axis lformat $axis %g"
1017	}
1018
1019	foreach axis { x y z } {
1020	set label [$_first hints ${axis}label]
1021	if { $label == "" } {
1022	if {$axis == "z"} {
1023	if { [string match "component*" $_curFldName] } {
1024	set label [string toupper $axis]
1025	} else {
1026	set label $_curFldLabel
1027	}
1028	} else {
1029	set label [string toupper $axis]
1030	}
1031	}
1032	# May be a space in the axis label.
1033	SendCmd [list axis name $axis $label]
1034
1035	if {$axis == "z" && [$_first hints ${axis}units] == ""} {
1036	set units [lindex $_fields($_curFldName) 1]
1037	} else {
1038	set units [$_first hints ${axis}units]
1039	}
1040	if { $units != "" } {
1041	# May be a space in the axis units.
1042	SendCmd [list axis units $axis $units]
1043	}
1044	}
1045	#
1046	# Reset the camera and other view parameters
1047	#
1048	ResetAxes
1049	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1050	$_arcball quaternion $q
1051	if {$_settings(isHeightmap) } {
1052	if { $_view(ortho)} {
1053	SendCmd "camera mode ortho"
1054	} else {
1055	SendCmd "camera mode persp"
1056	}
1057	DoRotate
1058	SendCmd "camera reset"
1059	}
1060	PanCamera
1061	InitSettings axisXGrid axisYGrid axisZGrid \
1062	axisVisible axisLabels heightmapScale field isHeightmap \
1063	numIsolines
1064	if { [array size _fields] < 2 } {
1065	blt::table forget $itk_component(field) $itk_component(field_l)
1066	}
1067	RequestLegend
1068	set _reset 0
1069	}
1070	global readyForNextFrame
1071	set readyForNextFrame 0; # Don't advance to the next frame
1072
1073	# Actually write the commands to the server socket. If it fails, we don't
1074	# care. We're finished here.
1075	blt::busy hold $itk_component(hull)
1076	StopBufferingCommands
1077	blt::busy release $itk_component(hull)
1078	}
1079
1080	# ----------------------------------------------------------------------
1081	# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1082	#
1083	# Returns a list of server IDs for the current datasets being displayed. This
1084	# is normally a single ID, but it might be a list of IDs if the current data
1085	# object has multiple components.
1086	# ----------------------------------------------------------------------
1087	itcl::body Rappture::VtkHeightmapViewer::CurrentDatasets {args} {
1088	set flag [lindex $args 0]
1089	switch -- $flag {
1090	"-all" {
1091	if { [llength $args] > 1 } {
1092	error "CurrentDatasets: can't specify dataobj after \"-all\""
1093	}
1094	set dlist [get -objects]
1095	}
1096	"-visible" {
1097	if { [llength $args] > 1 } {
1098	set dlist {}
1099	set args [lrange $args 1 end]
1100	foreach dataobj $args {
1101	if { [info exists _obj2ovride($dataobj-raise)] } {
1102	lappend dlist $dataobj
1103	}
1104	}
1105	} else {
1106	set dlist [get -visible]
1107	}
1108	}
1109	default {
1110	set dlist $args
1111	}
1112	}
1113	set rlist ""
1114	foreach dataobj $dlist {
1115	foreach comp [$dataobj components] {
1116	set tag $dataobj-$comp
1117	if { [info exists _datasets($tag)] && $_datasets($tag) } {
1118	lappend rlist $tag
1119	}
1120	}
1121	}
1122	return $rlist
1123	}
1124
1125	# ----------------------------------------------------------------------
1126	# USAGE: Zoom in
1127	# USAGE: Zoom out
1128	# USAGE: Zoom reset
1129	#
1130	# Called automatically when the user clicks on one of the zoom
1131	# controls for this widget. Changes the zoom for the current view.
1132	# ----------------------------------------------------------------------
1133	itcl::body Rappture::VtkHeightmapViewer::Zoom {option} {
1134	switch -- $option {
1135	"in" {
1136	set _view(zoom) [expr {$_view(zoom)*1.25}]
1137	SendCmd "camera zoom $_view(zoom)"
1138	}
1139	"out" {
1140	set _view(zoom) [expr {$_view(zoom)*0.8}]
1141	SendCmd "camera zoom $_view(zoom)"
1142	}
1143	"reset" {
1144	array set _view {
1145	qw 0.36
1146	qx 0.25
1147	qy 0.50
1148	qz 0.70
1149	zoom 1.0
1150	xpan 0
1151	ypan 0
1152	}
1153	if { $_first != "" } {
1154	set location [$_first hints camera]
1155	if { $location != "" } {
1156	array set _view $location
1157	}
1158	}
1159	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1160	$_arcball quaternion $q
1161	if {$_settings(isHeightmap) } {
1162	DoRotate
1163	}
1164	SendCmd "camera reset"
1165	}
1166	}
1167	}
1168
1169	itcl::body Rappture::VtkHeightmapViewer::PanCamera {} {
1170	set x $_view(xpan)
1171	set y $_view(ypan)
1172	SendCmd "camera pan $x $y"
1173	}
1174
1175
1176	# ----------------------------------------------------------------------
1177	# USAGE: Rotate click <x> <y>
1178	# USAGE: Rotate drag <x> <y>
1179	# USAGE: Rotate release <x> <y>
1180	#
1181	# Called automatically when the user clicks/drags/releases in the
1182	# plot area. Moves the plot according to the user's actions.
1183	# ----------------------------------------------------------------------
1184	itcl::body Rappture::VtkHeightmapViewer::Rotate {option x y} {
1185	switch -- $option {
1186	"click" {
1187	$itk_component(view) configure -cursor fleur
1188	set _click(x) $x
1189	set _click(y) $y
1190	}
1191	"drag" {
1192	if {[array size _click] == 0} {
1193	Rotate click $x $y
1194	} else {
1195	set w [winfo width $itk_component(view)]
1196	set h [winfo height $itk_component(view)]
1197	if {$w <= 0 \|\| $h <= 0} {
1198	return
1199	}
1200
1201	if {[catch {
1202	# this fails sometimes for no apparent reason
1203	set dx [expr {double($x-$_click(x))/$w}]
1204	set dy [expr {double($y-$_click(y))/$h}]
1205	}]} {
1206	return
1207	}
1208	if { $dx == 0 && $dy == 0 } {
1209	return
1210	}
1211	set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1212	EventuallyRotate $q
1213	set _click(x) $x
1214	set _click(y) $y
1215	}
1216	}
1217	"release" {
1218	Rotate drag $x $y
1219	$itk_component(view) configure -cursor ""
1220	catch {unset _click}
1221	}
1222	default {
1223	error "bad option \"$option\": should be click, drag, release"
1224	}
1225	}
1226	}
1227
1228	itcl::body Rappture::VtkHeightmapViewer::Pick {x y} {
1229	foreach tag [CurrentDatasets -visible] {
1230	SendCmd "dataset getscalar pixel $x $y $tag"
1231	}
1232	}
1233
1234	# ----------------------------------------------------------------------
1235	# USAGE: $this Pan click x y
1236	# $this Pan drag x y
1237	# $this Pan release x y
1238	#
1239	# Called automatically when the user clicks on one of the zoom
1240	# controls for this widget. Changes the zoom for the current view.
1241	# ----------------------------------------------------------------------
1242	itcl::body Rappture::VtkHeightmapViewer::Pan {option x y} {
1243	switch -- $option {
1244	"set" {
1245	set w [winfo width $itk_component(view)]
1246	set h [winfo height $itk_component(view)]
1247	set x [expr $x / double($w)]
1248	set y [expr $y / double($h)]
1249	set _view(xpan) [expr $_view(xpan) + $x]
1250	set _view(ypan) [expr $_view(ypan) + $y]
1251	PanCamera
1252	return
1253	}
1254	"click" {
1255	set _click(x) $x
1256	set _click(y) $y
1257	$itk_component(view) configure -cursor hand1
1258	}
1259	"drag" {
1260	if { ![info exists _click(x)] } {
1261	set _click(x) $x
1262	}
1263	if { ![info exists _click(y)] } {
1264	set _click(y) $y
1265	}
1266	set w [winfo width $itk_component(view)]
1267	set h [winfo height $itk_component(view)]
1268	set dx [expr ($_click(x) - $x)/double($w)]
1269	set dy [expr ($_click(y) - $y)/double($h)]
1270	set _click(x) $x
1271	set _click(y) $y
1272	set _view(xpan) [expr $_view(xpan) - $dx]
1273	set _view(ypan) [expr $_view(ypan) - $dy]
1274	PanCamera
1275	}
1276	"release" {
1277	Pan drag $x $y
1278	$itk_component(view) configure -cursor ""
1279	}
1280	default {
1281	error "unknown option \"$option\": should set, click, drag, or release"
1282	}
1283	}
1284	}
1285
1286	# ----------------------------------------------------------------------
1287	# USAGE: InitSettings <what> ?<value>?
1288	#
1289	# Used internally to update rendering settings whenever parameters
1290	# change in the popup settings panel. Sends the new settings off
1291	# to the back end.
1292	# ----------------------------------------------------------------------
1293	itcl::body Rappture::VtkHeightmapViewer::InitSettings { args } {
1294	foreach spec $args {
1295	if { [info exists _settings($_first-$spec)] } {
1296	# Reset global setting with dataobj specific setting
1297	set _settings($spec) $_settings($_first-$spec)
1298	}
1299	AdjustSetting $spec
1300	}
1301	}
1302
1303	#
1304	# AdjustSetting --
1305	#
1306	# Changes/updates a specific setting in the widget. There are
1307	# usually user-setable option. Commands are sent to the render
1308	# server.
1309	#
1310	itcl::body Rappture::VtkHeightmapViewer::AdjustSetting {what {value ""}} {
1311	if { $_beforeConnect } {
1312	return
1313	}
1314	switch -- $what {
1315	"axisFlymode" {
1316	set mode [$itk_component(axisflymode) value]
1317	set mode [$itk_component(axisflymode) translate $mode]
1318	set _settings($what) $mode
1319	SendCmd "axis flymode $mode"
1320	}
1321	"axisLabels" {
1322	set bool $_settings(axisLabels)
1323	SendCmd "axis labels all $bool"
1324	}
1325	"axisMinorTicks" {
1326	set bool $_settings(axisMinorTicks)
1327	foreach axis { x y z } {
1328	SendCmd "axis minticks ${axis} $bool"
1329	}
1330	}
1331	"axisVisible" {
1332	set bool $_settings(axisVisible)
1333	SendCmd "axis visible all $bool"
1334	}
1335	"axisXGrid" - "axisYGrid" - "axisZGrid" {
1336	set axis [string tolower [string range $what 4 4]]
1337	set bool $_settings($what)
1338	SendCmd "axis grid $axis $bool"
1339	}
1340	"background" {
1341	set bg [$itk_component(background) value]
1342	array set fgcolors {
1343	"black" "white"
1344	"white" "black"
1345	"grey" "black"
1346	}
1347	set fg $fgcolors($bg)
1348	configure -plotbackground $bg -plotforeground $fg
1349	$itk_component(view) delete "legend"
1350	SendCmd "screen bgcolor [Color2RGB $bg]"
1351	SendCmd "outline color [Color2RGB $fg]"
1352	SendCmd "axis color all [Color2RGB $fg]"
1353	DrawLegend
1354	}
1355	"colormap" {
1356	set _changed(colormap) 1
1357	StartBufferingCommands
1358	set color [$itk_component(colormap) value]
1359	set _settings(colormap) $color
1360	if { $color == "none" } {
1361	if { $_settings(colormapVisible) } {
1362	SendCmd "heightmap surface 0"
1363	set _settings(colormapVisible) 0
1364	}
1365	} else {
1366	if { !$_settings(colormapVisible) } {
1367	SendCmd "heightmap surface 1"
1368	set _settings(colormapVisible) 1
1369	}
1370	SetCurrentColormap $color
1371	if {$_settings(colormapDiscrete)} {
1372	set numColors [expr $_settings(numIsolines) + 1]
1373	SendCmd "colormap res $numColors $color"
1374	}
1375	}
1376	StopBufferingCommands
1377	EventuallyRequestLegend
1378	}
1379	"colormapVisible" {
1380	set bool $_settings($what)
1381	SendCmd "heightmap surface $bool"
1382	}
1383	"colormapDiscrete" {
1384	set bool $_settings($what)
1385	set numColors [expr $_settings(numIsolines) + 1]
1386	StartBufferingCommands
1387	if {$bool} {
1388	SendCmd "colormap res $numColors"
1389	# Discrete colormap requires preinterp on
1390	SendCmd "heightmap preinterp on"
1391	} else {
1392	SendCmd "colormap res default"
1393	# FIXME: add setting for preinterp (default on)
1394	SendCmd "heightmap preinterp on"
1395	}
1396	StopBufferingCommands
1397	EventuallyRequestLegend
1398	}
1399	"edges" {
1400	set bool $_settings(edges)
1401	SendCmd "heightmap edges $bool"
1402	}
1403	"field" {
1404	set label [$itk_component(field) value]
1405	set fname [$itk_component(field) translate $label]
1406	set _settings(field) $fname
1407	if { [info exists _fields($fname)] } {
1408	foreach { label units components } $_fields($fname) break
1409	if { $components > 1 } {
1410	set _colorMode vmag
1411	} else {
1412	set _colorMode scalar
1413	}
1414	set _curFldName $fname
1415	set _curFldLabel $label
1416	} else {
1417	puts stderr "unknown field \"$fname\""
1418	return
1419	}
1420	set label [$_first hints zlabel]
1421	if { $label == "" } {
1422	if { [string match "component*" $_curFldName] } {
1423	set label Z
1424	} else {
1425	set label $_curFldLabel
1426	}
1427	}
1428	# May be a space in the axis label.
1429	SendCmd [list axis name z $label]
1430
1431	if { [$_first hints zunits] == "" } {
1432	set units [lindex $_fields($_curFldName) 1]
1433	} else {
1434	set units [$_first hints zunits]
1435	}
1436	if { $units != "" } {
1437	# May be a space in the axis units.
1438	SendCmd [list axis units z $units]
1439	}
1440	# Get the new limits because the field changed.
1441	ResetAxes
1442	SendCmd "dataset scalar $_curFldName"
1443	SendCmd "heightmap colormode scalar $_curFldName"
1444	SendCmd "camera reset"
1445	UpdateContourList
1446	DrawLegend
1447	}
1448	"heightmapScale" {
1449	if { $_settings(isHeightmap) } {
1450	set scale [GetHeightmapScale]
1451	# Have to set the datasets individually because we are
1452	# tracking them in _comp2scale.
1453	foreach dataset [CurrentDatasets -all] {
1454	SendCmd "heightmap heightscale $scale $dataset"
1455	set _comp2scale($dataset) $scale
1456	}
1457	ResetAxes
1458	}
1459	}
1460	"isHeightmap" {
1461	set bool $_settings(isHeightmap)
1462	set c $itk_component(view)
1463	StartBufferingCommands
1464	# Fix heightmap scale: 0 for contours, 1 for heightmaps.
1465	if { $bool } {
1466	set _settings(heightmapScale) 50
1467	set _settings(opacity) $_settings(saveOpacity)
1468	set _settings(lighting) $_settings(saveLighting)
1469	set _settings(outline) 0
1470	} else {
1471	set _settings(heightmapScale) 0
1472	set _settings(lighting) 0
1473	set _settings(opacity) 100
1474	set _settings(outline) $_settings(saveOutline)
1475	}
1476	AdjustSetting lighting
1477	AdjustSetting opacity
1478	AdjustSetting outline
1479	set scale [GetHeightmapScale]
1480	# Have to set the datasets individually because we are
1481	# tracking them in _comp2scale.
1482	foreach dataset [CurrentDatasets -all] {
1483	SendCmd "heightmap heightscale $scale $dataset"
1484	set _comp2scale($dataset) $scale
1485	}
1486	if { $bool } {
1487	$itk_component(lighting) configure -state normal
1488	$itk_component(opacity) configure -state normal
1489	$itk_component(scale) configure -state normal
1490	$itk_component(opacity_l) configure -state normal
1491	$itk_component(scale_l) configure -state normal
1492	$itk_component(outline) configure -state disabled
1493	if {$_view(ortho)} {
1494	SendCmd "camera mode ortho"
1495	} else {
1496	SendCmd "camera mode persp"
1497	}
1498	} else {
1499	$itk_component(lighting) configure -state disabled
1500	$itk_component(opacity) configure -state disabled
1501	$itk_component(scale) configure -state disabled
1502	$itk_component(opacity_l) configure -state disabled
1503	$itk_component(scale_l) configure -state disabled
1504	$itk_component(outline) configure -state normal
1505	SendCmd "camera mode image"
1506	}
1507	if {$_settings(stretchToFit)} {
1508	if {$scale == 0} {
1509	SendCmd "camera aspect window"
1510	} else {
1511	SendCmd "camera aspect square"
1512	}
1513	}
1514	ResetAxes
1515	if { $bool } {
1516	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
1517	$_arcball quaternion $q
1518	SendCmd "camera orient $q"
1519	} else {
1520	bind $c <ButtonPress-1> {}
1521	bind $c <B1-Motion> {}
1522	bind $c <ButtonRelease-1> {}
1523	}
1524	SendCmd "camera reset"
1525	# Fix the mouse bindings for rotation/panning and the
1526	# camera mode. Ideally we'd create a bindtag for these.
1527	if { $bool } {
1528	# Bindings for rotation via mouse
1529	bind $c <ButtonPress-1> \
1530	[itcl::code $this Rotate click %x %y]
1531	bind $c <B1-Motion> \
1532	[itcl::code $this Rotate drag %x %y]
1533	bind $c <ButtonRelease-1> \
1534	[itcl::code $this Rotate release %x %y]
1535	}
1536	StopBufferingCommands
1537	}
1538	"isolineColor" {
1539	set color [$itk_component(isolinecolor) value]
1540	if { $color == "none" } {
1541	if { $_settings(isolinesVisible) } {
1542	SendCmd "heightmap isolines 0"
1543	set _settings(isolinesVisible) 0
1544	}
1545	} else {
1546	if { !$_settings(isolinesVisible) } {
1547	SendCmd "heightmap isolines 1"
1548	set _settings(isolinesVisible) 1
1549	}
1550	SendCmd "heightmap isolinecolor [Color2RGB $color]"
1551	}
1552	DrawLegend
1553	}
1554	"isolinesVisible" {
1555	set bool $_settings($what)
1556	SendCmd "heightmap isolines $bool"
1557	DrawLegend
1558	}
1559	"legendVisible" {
1560	if { !$_settings($what) } {
1561	$itk_component(view) delete legend
1562	}
1563	DrawLegend
1564	}
1565	"lighting" {
1566	if { $_settings(isHeightmap) } {
1567	set _settings(saveLighting) $_settings(lighting)
1568	set bool $_settings($what)
1569	SendCmd "heightmap lighting $bool"
1570	} else {
1571	SendCmd "heightmap lighting 0"
1572	}
1573	}
1574	"numIsolines" {
1575	set _settings(numIsolines) [$itk_component(numisolines) value]
1576	set _currentNumIsolines $_settings(numIsolines)
1577	UpdateContourList
1578	set _changed(numIsolines) 1
1579	SendCmd "heightmap contourlist [list $_contourList]"
1580	if {$_settings(colormapDiscrete)} {
1581	set numColors [expr $_settings(numIsolines) + 1]
1582	SendCmd "colormap res $numColors"
1583	EventuallyRequestLegend
1584	} else {
1585	DrawLegend
1586	}
1587	}
1588	"opacity" {
1589	set _changed(opacity) 1
1590	if { $_settings(isHeightmap) } {
1591	set _settings(saveOpacity) $_settings(opacity)
1592	set val $_settings(opacity)
1593	set sval [expr { 0.01 * double($val) }]
1594	SendCmd "heightmap opacity $sval"
1595	} else {
1596	SendCmd "heightmap opacity 1"
1597	}
1598	}
1599	"outline" {
1600	if { $_settings(isHeightmap) } {
1601	SendCmd "outline visible 0"
1602	} else {
1603	set _settings(saveOutline) $_settings(outline)
1604	set bool $_settings(outline)
1605	SendCmd "outline visible $bool"
1606	}
1607	}
1608	"stretchToFit" {
1609	set bool $_settings($what)
1610	if { $bool } {
1611	set heightScale [GetHeightmapScale]
1612	if {$heightScale == 0} {
1613	SendCmd "camera aspect window"
1614	} else {
1615	SendCmd "camera aspect square"
1616	}
1617	} else {
1618	SendCmd "camera aspect native"
1619	}
1620	}
1621	"wireframe" {
1622	set bool $_settings($what)
1623	SendCmd "heightmap wireframe $bool"
1624	}
1625	default {
1626	error "don't know how to fix $what"
1627	}
1628	}
1629	}
1630
1631	#
1632	# RequestLegend --
1633	#
1634	# Request a new legend from the server. The size of the legend
1635	# is determined from the height of the canvas.
1636	#
1637	# This should be called when
1638	# 1. A new current colormap is set.
1639	# 2. Window is resized.
1640	# 3. The limits of the data have changed. (Just need a redraw).
1641	# 4. Number of isolines have changed. (Just need a redraw).
1642	# 5. Legend becomes visible (Just need a redraw).
1643	#
1644	itcl::body Rappture::VtkHeightmapViewer::RequestLegend {} {
1645	set _legendPending 0
1646	set font "Arial 8"
1647	set w 12
1648	set lineht [font metrics $font -linespace]
1649	# color ramp height = (canvas height) - (min and max value lines) - 2
1650	set h [expr {$_height - 2 * ($lineht + 2)}]
1651	set _legendHeight $h
1652
1653	set fname $_curFldName
1654	if { [string match "component*" $fname] } {
1655	set title ""
1656	} else {
1657	if { [info exists _fields($fname)] } {
1658	foreach { title units } $_fields($fname) break
1659	if { $units != "" } {
1660	set title [format "%s (%s)" $title $units]
1661	}
1662	} else {
1663	set title $fname
1664	}
1665	}
1666	# If there's a title too, substract one more line
1667	if { $title != "" } {
1668	incr h -$lineht
1669	}
1670	if { $h < 1} {
1671	return
1672	}
1673	# Set the legend on the first heightmap dataset.
1674	if { $_currentColormap != "" } {
1675	set cmap $_currentColormap
1676	SendCmd "legend $cmap scalar $_curFldName {} $w $h 0"
1677	#SendCmd "heightmap colormode scalar $_curFldName"
1678	#SendCmd "dataset scalar $_curFldName"
1679	}
1680	}
1681
1682	#
1683	# ResetAxes --
1684	#
1685	# Set axis z bounds and range
1686	#
1687	itcl::body Rappture::VtkHeightmapViewer::ResetAxes {} {
1688	if { ![info exists _limits($_curFldName)]} {
1689	SendCmd "dataset maprange all"
1690	SendCmd "axis autorange z on"
1691	SendCmd "axis autobounds z on"
1692	return
1693	}
1694	foreach { xmin xmax } $_limits(x) break
1695	foreach { ymin ymax } $_limits(y) break
1696	foreach { vmin vmax } $_limits($_curFldName) break
1697
1698	global tcl_precision
1699	set tcl_precision 17
1700	set xr [expr $xmax - $xmin]
1701	set yr [expr $ymax - $ymin]
1702	set vr [expr $vmax - $vmin]
1703	set r [expr ($yr > $xr) ? $yr : $xr]
1704	if { $vr < 1.0e-17 } {
1705	set dataScale 1.0
1706	} else {
1707	set dataScale [expr $r / $vr]
1708	}
1709	set heightScale [GetHeightmapScale]
1710	set bmin [expr $heightScale * $dataScale * $vmin]
1711	set bmax [expr $heightScale * $dataScale * $vmax]
1712	if {$heightScale > 0} {
1713	set zpos [expr - $bmin]
1714	SendCmd "heightmap pos 0 0 $zpos"
1715	} else {
1716	SendCmd "heightmap pos 0 0 0"
1717	}
1718	set bmax [expr $bmax - $bmin]
1719	set bmin 0
1720	SendCmd "dataset maprange explicit $_limits($_curFldName) $_curFldName"
1721	SendCmd "axis bounds z $bmin $bmax"
1722	SendCmd "axis range z $_limits($_curFldName)"
1723	}
1724
1725	#
1726	# SetCurrentColormap --
1727	#
1728	itcl::body Rappture::VtkHeightmapViewer::SetCurrentColormap { name } {
1729	# Keep track of the colormaps that we build.
1730	if { ![info exists _colormaps($name)] } {
1731	BuildColormap $name
1732	set _colormaps($name) 1
1733	}
1734	set _currentColormap $name
1735	SendCmd "heightmap colormap $_currentColormap"
1736	}
1737
1738
1739	#
1740	# BuildColormap --
1741	#
1742	# Build the designated colormap on the server.
1743	#
1744	itcl::body Rappture::VtkHeightmapViewer::BuildColormap { name } {
1745	set cmap [ColorsToColormap $name]
1746	if { [llength $cmap] == 0 } {
1747	set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
1748	}
1749	set wmap "0.0 1.0 1.0 1.0"
1750	SendCmd "colormap add $name { $cmap } { $wmap }"
1751	}
1752
1753	# ----------------------------------------------------------------------
1754	# CONFIGURATION OPTION: -mode
1755	# ----------------------------------------------------------------------
1756	itcl::configbody Rappture::VtkHeightmapViewer::mode {
1757	switch -- $itk_option(-mode) {
1758	"heightmap" {
1759	set _settings(isHeightmap) 1
1760	}
1761	"contour" {
1762	set _settings(isHeightmap) 0
1763	}
1764	default {
1765	error "unknown mode settings \"$itk_option(-mode)\""
1766	}
1767	}
1768	if { !$_reset } {
1769	AdjustSetting isHeightmap
1770	}
1771	}
1772
1773	# ----------------------------------------------------------------------
1774	# CONFIGURATION OPTION: -plotbackground
1775	# ----------------------------------------------------------------------
1776	itcl::configbody Rappture::VtkHeightmapViewer::plotbackground {
1777	if { [isconnected] } {
1778	set rgb [Color2RGB $itk_option(-plotbackground)]
1779	if { !$_reset } {
1780	SendCmd "screen bgcolor $rgb"
1781	}
1782	$itk_component(view) configure -background $itk_option(-plotbackground)
1783	}
1784	}
1785
1786	# ----------------------------------------------------------------------
1787	# CONFIGURATION OPTION: -plotforeground
1788	# ----------------------------------------------------------------------
1789	itcl::configbody Rappture::VtkHeightmapViewer::plotforeground {
1790	if { [isconnected] } {
1791	set rgb [Color2RGB $itk_option(-plotforeground)]
1792	if { !$_reset } {
1793	SendCmd "outline color $rgb"
1794	SendCmd "axis color all $rgb"
1795	}
1796	}
1797	}
1798
1799	itcl::body Rappture::VtkHeightmapViewer::limits3 { dataobj } {
1800	lappend limits x [$dataobj limits x]
1801	lappend limits y [$dataobj limits y]
1802	if { [catch { $dataobj limits $_curFldName } vlim] != 0 } {
1803	set vlim [$dataobj limits v]
1804	}
1805	lappend limits v $vlim
1806	return $limits
1807	}
1808
1809	itcl::body Rappture::VtkHeightmapViewer::BuildContourTab {} {
1810
1811	set fg [option get $itk_component(hull) font Font]
1812	#set bfg [option get $itk_component(hull) boldFont Font]
1813
1814	set inner [$itk_component(main) insert end \
1815	-title "Contour/Surface Settings" \
1816	-icon [Rappture::icon contour2]]
1817	$inner configure -borderwidth 4
1818
1819	checkbutton $inner.legend \
1820	-text "Legend" \
1821	-variable [itcl::scope _settings(legendVisible)] \
1822	-command [itcl::code $this AdjustSetting legendVisible] \
1823	-font "Arial 9"
1824
1825	checkbutton $inner.wireframe \
1826	-text "Wireframe" \
1827	-variable [itcl::scope _settings(wireframe)] \
1828	-command [itcl::code $this AdjustSetting wireframe] \
1829	-font "Arial 9"
1830
1831	itk_component add lighting {
1832	checkbutton $inner.lighting \
1833	-text "Enable Lighting" \
1834	-variable [itcl::scope _settings(lighting)] \
1835	-command [itcl::code $this AdjustSetting lighting] \
1836	-font "Arial 9"
1837	} {
1838	ignore -font
1839	}
1840	checkbutton $inner.edges \
1841	-text "Edges" \
1842	-variable [itcl::scope _settings(edges)] \
1843	-command [itcl::code $this AdjustSetting edges] \
1844	-font "Arial 9"
1845
1846	itk_component add outline {
1847	checkbutton $inner.outline \
1848	-text "Outline" \
1849	-variable [itcl::scope _settings(outline)] \
1850	-command [itcl::code $this AdjustSetting outline] \
1851	-font "Arial 9"
1852	} {
1853	ignore -font
1854	}
1855	checkbutton $inner.stretch \
1856	-text "Stretch to fit" \
1857	-variable [itcl::scope _settings(stretchToFit)] \
1858	-command [itcl::code $this AdjustSetting stretchToFit] \
1859	-font "Arial 9"
1860
1861	checkbutton $inner.isolines \
1862	-text "Isolines" \
1863	-variable [itcl::scope _settings(isolinesVisible)] \
1864	-command [itcl::code $this AdjustSetting isolinesVisible] \
1865	-font "Arial 9"
1866
1867	checkbutton $inner.colormapDiscrete \
1868	-text "Discrete Colormap" \
1869	-variable [itcl::scope _settings(colormapDiscrete)] \
1870	-command [itcl::code $this AdjustSetting colormapDiscrete] \
1871	-font "Arial 9"
1872
1873	itk_component add field_l {
1874	label $inner.field_l -text "Field" -font "Arial 9"
1875	} {
1876	ignore -font
1877	}
1878	itk_component add field {
1879	Rappture::Combobox $inner.field -width 10 -editable no
1880	}
1881	bind $inner.field <<Value>> \
1882	[itcl::code $this AdjustSetting field]
1883
1884	label $inner.colormap_l -text "Colormap" -font "Arial 9"
1885	itk_component add colormap {
1886	Rappture::Combobox $inner.colormap -width 10 -editable no
1887	}
1888	$inner.colormap choices insert end \
1889	"BCGYR" "BCGYR" \
1890	"BGYOR" "BGYOR" \
1891	"blue" "blue" \
1892	"blue-to-brown" "blue-to-brown" \
1893	"blue-to-orange" "blue-to-orange" \
1894	"blue-to-grey" "blue-to-grey" \
1895	"green-to-magenta" "green-to-magenta" \
1896	"greyscale" "greyscale" \
1897	"nanohub" "nanohub" \
1898	"rainbow" "rainbow" \
1899	"spectral" "spectral" \
1900	"ROYGB" "ROYGB" \
1901	"RYGCB" "RYGCB" \
1902	"brown-to-blue" "brown-to-blue" \
1903	"grey-to-blue" "grey-to-blue" \
1904	"orange-to-blue" "orange-to-blue" \
1905	"none" "none"
1906
1907	$itk_component(colormap) value "BCGYR"
1908	bind $inner.colormap <<Value>> \
1909	[itcl::code $this AdjustSetting colormap]
1910
1911	label $inner.isolinecolor_l -text "Isolines Color" -font "Arial 9"
1912	itk_component add isolinecolor {
1913	Rappture::Combobox $inner.isolinecolor -width 10 -editable no
1914	}
1915	$inner.isolinecolor choices insert end \
1916	"black" "black" \
1917	"blue" "blue" \
1918	"cyan" "cyan" \
1919	"green" "green" \
1920	"grey" "grey" \
1921	"magenta" "magenta" \
1922	"orange" "orange" \
1923	"red" "red" \
1924	"white" "white" \
1925	"none" "none"
1926
1927	$itk_component(isolinecolor) value "black"
1928	bind $inner.isolinecolor <<Value>> \
1929	[itcl::code $this AdjustSetting isolineColor]
1930
1931	label $inner.background_l -text "Background Color" -font "Arial 9"
1932	itk_component add background {
1933	Rappture::Combobox $inner.background -width 10 -editable no
1934	}
1935	$inner.background choices insert end \
1936	"black" "black" \
1937	"white" "white" \
1938	"grey" "grey"
1939
1940	$itk_component(background) value "white"
1941	bind $inner.background <<Value>> [itcl::code $this AdjustSetting background]
1942
1943	itk_component add opacity_l {
1944	label $inner.opacity_l -text "Opacity" -font "Arial 9"
1945	} {
1946	ignore -font
1947	}
1948	itk_component add opacity {
1949	::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1950	-variable [itcl::scope _settings(opacity)] \
1951	-showvalue off \
1952	-command [itcl::code $this AdjustSetting opacity]
1953	}
1954	itk_component add scale_l {
1955	label $inner.scale_l -text "Scale" -font "Arial 9"
1956	} {
1957	ignore -font
1958	}
1959	itk_component add scale {
1960	::scale $inner.scale -from 0 -to 100 -orient horizontal \
1961	-variable [itcl::scope _settings(heightmapScale)] \
1962	-showvalue off \
1963	-command [itcl::code $this AdjustSetting heightmapScale]
1964	}
1965	label $inner.numisolines_l -text "Number of Isolines" -font "Arial 9"
1966	itk_component add numisolines {
1967	Rappture::Spinint $inner.numisolines \
1968	-min 1 -max 50 -font "arial 9"
1969	}
1970	$itk_component(numisolines) value $_settings(numIsolines)
1971	bind $itk_component(numisolines) <<Value>> \
1972	[itcl::code $this AdjustSetting numIsolines]
1973
1974	frame $inner.separator1 -height 2 -relief sunken -bd 1
1975	frame $inner.separator2 -height 2 -relief sunken -bd 1
1976
1977	blt::table $inner \
1978	0,0 $inner.field_l -anchor w -pady 2 \
1979	0,1 $inner.field -anchor w -pady 2 -fill x \
1980	1,0 $inner.colormap_l -anchor w -pady 2 \
1981	1,1 $inner.colormap -anchor w -pady 2 -fill x \
1982	2,0 $inner.isolinecolor_l -anchor w -pady 2 \
1983	2,1 $inner.isolinecolor -anchor w -pady 2 -fill x \
1984	3,0 $inner.background_l -anchor w -pady 2 \
1985	3,1 $inner.background -anchor w -pady 2 -fill x \
1986	4,0 $inner.numisolines_l -anchor w -pady 2 \
1987	4,1 $inner.numisolines -anchor w -pady 2 \
1988	5,0 $inner.stretch -anchor w -pady 2 -cspan 2 \
1989	6,0 $inner.edges -anchor w -pady 2 -cspan 2 \
1990	7,0 $inner.legend -anchor w -pady 2 -cspan 2 \
1991	8,0 $inner.colormapDiscrete -anchor w -pady 2 -cspan 2 \
1992	9,0 $inner.wireframe -anchor w -pady 2 -cspan 2\
1993	10,0 $inner.isolines -anchor w -pady 2 -cspan 2 \
1994	11,0 $inner.separator1 -padx 2 -fill x -cspan 2 \
1995	12,0 $inner.outline -anchor w -pady 2 -cspan 2 \
1996	13,0 $inner.separator2 -padx 2 -fill x -cspan 2 \
1997	14,0 $inner.lighting -anchor w -pady 2 -cspan 2 \
1998	15,0 $inner.opacity_l -anchor w -pady 2 \
1999	15,1 $inner.opacity -fill x -pady 2 \
2000	16,0 $inner.scale_l -anchor w -pady 2 -cspan 2 \
2001	16,1 $inner.scale -fill x -pady 2 -cspan 2 \
2002
2003	blt::table configure $inner r* c* -resize none
2004	blt::table configure $inner r17 c1 -resize expand
2005	}
2006
2007	itcl::body Rappture::VtkHeightmapViewer::BuildAxisTab {} {
2008
2009	set fg [option get $itk_component(hull) font Font]
2010	#set bfg [option get $itk_component(hull) boldFont Font]
2011
2012	set inner [$itk_component(main) insert end \
2013	-title "Axis Settings" \
2014	-icon [Rappture::icon axis2]]
2015	$inner configure -borderwidth 4
2016
2017	checkbutton $inner.visible \
2018	-text "Axes" \
2019	-variable [itcl::scope _settings(axisVisible)] \
2020	-command [itcl::code $this AdjustSetting axisVisible] \
2021	-font "Arial 9"
2022	checkbutton $inner.labels \
2023	-text "Axis Labels" \
2024	-variable [itcl::scope _settings(axisLabels)] \
2025	-command [itcl::code $this AdjustSetting axisLabels] \
2026	-font "Arial 9"
2027	label $inner.grid_l -text "Grid" -font "Arial 9"
2028	checkbutton $inner.xgrid \
2029	-text "X" \
2030	-variable [itcl::scope _settings(axisXGrid)] \
2031	-command [itcl::code $this AdjustSetting axisXGrid] \
2032	-font "Arial 9"
2033	checkbutton $inner.ygrid \
2034	-text "Y" \
2035	-variable [itcl::scope _settings(axisYGrid)] \
2036	-command [itcl::code $this AdjustSetting axisYGrid] \
2037	-font "Arial 9"
2038	checkbutton $inner.zgrid \
2039	-text "Z" \
2040	-variable [itcl::scope _settings(axisZGrid)] \
2041	-command [itcl::code $this AdjustSetting axisZGrid] \
2042	-font "Arial 9"
2043	checkbutton $inner.minorticks \
2044	-text "Minor Ticks" \
2045	-variable [itcl::scope _settings(axisMinorTicks)] \
2046	-command [itcl::code $this AdjustSetting axisMinorTicks] \
2047	-font "Arial 9"
2048
2049
2050	label $inner.mode_l -text "Mode" -font "Arial 9"
2051
2052	itk_component add axisflymode {
2053	Rappture::Combobox $inner.mode -width 10 -editable no
2054	}
2055	$inner.mode choices insert end \
2056	"static_triad" "static" \
2057	"closest_triad" "closest" \
2058	"furthest_triad" "furthest" \
2059	"outer_edges" "outer"
2060	$itk_component(axisflymode) value "static"
2061	bind $inner.mode <<Value>> [itcl::code $this AdjustSetting axisFlymode]
2062
2063	blt::table $inner \
2064	0,0 $inner.visible -anchor w -cspan 4 \
2065	1,0 $inner.labels -anchor w -cspan 4 \
2066	2,0 $inner.minorticks -anchor w -cspan 4 \
2067	4,0 $inner.grid_l -anchor w \
2068	4,1 $inner.xgrid -anchor w \
2069	4,2 $inner.ygrid -anchor w \
2070	4,3 $inner.zgrid -anchor w \
2071	5,0 $inner.mode_l -anchor w -padx { 2 0 } \
2072	5,1 $inner.mode -fill x -cspan 3
2073
2074	blt::table configure $inner r* c* -resize none
2075	blt::table configure $inner r7 c6 -resize expand
2076	blt::table configure $inner r3 -height 0.125i
2077	}
2078
2079
2080	itcl::body Rappture::VtkHeightmapViewer::BuildCameraTab {} {
2081	set inner [$itk_component(main) insert end \
2082	-title "Camera Settings" \
2083	-icon [Rappture::icon camera]]
2084	$inner configure -borderwidth 4
2085
2086	label $inner.view_l -text "view" -font "Arial 9"
2087	set f [frame $inner.view]
2088	foreach side { front back left right top bottom } {
2089	button $f.$side -image [Rappture::icon view$side] \
2090	-command [itcl::code $this SetOrientation $side]
2091	Rappture::Tooltip::for $f.$side "Change the view to $side"
2092	pack $f.$side -side left
2093	}
2094
2095	blt::table $inner \
2096	0,0 $inner.view_l -anchor e -pady 2 \
2097	0,1 $inner.view -anchor w -pady 2
2098
2099	set labels { qx qy qz qw xpan ypan zoom }
2100	set row 1
2101	foreach tag $labels {
2102	label $inner.${tag}label -text $tag -font "Arial 9"
2103	entry $inner.${tag} -font "Arial 9" -bg white \
2104	-textvariable [itcl::scope _view($tag)]
2105	bind $inner.${tag} <Return> \
2106	[itcl::code $this camera set ${tag}]
2107	bind $inner.${tag} <KP_Enter> \
2108	[itcl::code $this camera set ${tag}]
2109	blt::table $inner \
2110	$row,0 $inner.${tag}label -anchor e -pady 2 \
2111	$row,1 $inner.${tag} -anchor w -pady 2
2112	blt::table configure $inner r$row -resize none
2113	incr row
2114	}
2115	checkbutton $inner.ortho \
2116	-text "Orthographic Projection" \
2117	-variable [itcl::scope _view(ortho)] \
2118	-command [itcl::code $this camera set ortho] \
2119	-font "Arial 9"
2120	blt::table $inner \
2121	$row,0 $inner.ortho -cspan 2 -anchor w -pady 2
2122	blt::table configure $inner r$row -resize none
2123	incr row
2124
2125	blt::table configure $inner c* r* -resize none
2126	blt::table configure $inner c2 -resize expand
2127	blt::table configure $inner r$row -resize expand
2128	}
2129
2130	#
2131	# camera --
2132	#
2133	itcl::body Rappture::VtkHeightmapViewer::camera {option args} {
2134	switch -- $option {
2135	"show" {
2136	puts [array get _view]
2137	}
2138	"set" {
2139	set who [lindex $args 0]
2140	set x $_view($who)
2141	set code [catch { string is double $x } result]
2142	if { $code != 0 \|\| !$result } {
2143	return
2144	}
2145	switch -- $who {
2146	"ortho" {
2147	if {$_view(ortho)} {
2148	SendCmd "camera mode ortho"
2149	} else {
2150	SendCmd "camera mode persp"
2151	}
2152	}
2153	"xpan" - "ypan" {
2154	PanCamera
2155	}
2156	"qx" - "qy" - "qz" - "qw" {
2157	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2158	$_arcball quaternion $q
2159	EventuallyRotate $q
2160	}
2161	"zoom" {
2162	SendCmd "camera zoom $_view(zoom)"
2163	}
2164	}
2165	}
2166	}
2167	}
2168
2169	itcl::body Rappture::VtkHeightmapViewer::GetVtkData { args } {
2170	set bytes ""
2171	foreach dataobj [get] {
2172	foreach comp [$dataobj components] {
2173	set tag $dataobj-$comp
2174	#set contents [ConvertToVtkData $dataobj $comp]
2175	set contents [$dataobj vtkdata $comp]
2176	append bytes "$contents\n\n"
2177	}
2178	}
2179	return [list .vtk $bytes]
2180	}
2181
2182	itcl::body Rappture::VtkHeightmapViewer::GetImage { args } {
2183	if { [image width $_image(download)] > 0 &&
2184	[image height $_image(download)] > 0 } {
2185	set bytes [$_image(download) data -format "jpeg -quality 100"]
2186	set bytes [Rappture::encoding::decode -as b64 $bytes]
2187	return [list .jpg $bytes]
2188	}
2189	return ""
2190	}
2191
2192	itcl::body Rappture::VtkHeightmapViewer::BuildDownloadPopup { popup command } {
2193	Rappture::Balloon $popup \
2194	-title "[Rappture::filexfer::label downloadWord] as..."
2195	set inner [$popup component inner]
2196	label $inner.summary -text "" -anchor w
2197	radiobutton $inner.vtk_button -text "VTK data file" \
2198	-variable [itcl::scope _downloadPopup(format)] \
2199	-font "Arial 9 " \
2200	-value vtk
2201	Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
2202	radiobutton $inner.image_button -text "Image File" \
2203	-variable [itcl::scope _downloadPopup(format)] \
2204	-font "Arial 9 " \
2205	-value image
2206	Rappture::Tooltip::for $inner.image_button \
2207	"Save as digital image."
2208
2209	button $inner.ok -text "Save" \
2210	-highlightthickness 0 -pady 2 -padx 3 \
2211	-command $command \
2212	-compound left \
2213	-image [Rappture::icon download]
2214
2215	button $inner.cancel -text "Cancel" \
2216	-highlightthickness 0 -pady 2 -padx 3 \
2217	-command [list $popup deactivate] \
2218	-compound left \
2219	-image [Rappture::icon cancel]
2220
2221	blt::table $inner \
2222	0,0 $inner.summary -cspan 2 \
2223	1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
2224	2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
2225	4,1 $inner.cancel -width .9i -fill y \
2226	4,0 $inner.ok -padx 2 -width .9i -fill y
2227	blt::table configure $inner r3 -height 4
2228	blt::table configure $inner r4 -pady 4
2229	raise $inner.image_button
2230	$inner.vtk_button invoke
2231	return $inner
2232	}
2233
2234	#
2235	# SetObjectStyle --
2236	#
2237	# Set the style of the heightmap/contour object. This gets calls
2238	# for each dataset once as it is loaded. It can overridden by
2239	# the user controls.
2240	#
2241	#
2242	itcl::body Rappture::VtkHeightmapViewer::SetObjectStyle { dataobj comp } {
2243	# Parse style string.
2244	set tag $dataobj-$comp
2245	array set style {
2246	-color BCGYR
2247	-opacity 100
2248	-levels 10
2249	}
2250	set stylelist [$dataobj style $comp]
2251	if { $stylelist != "" } {
2252	array set style $stylelist
2253	}
2254	# This is too complicated. We want to set the colormap, number of
2255	# isolines and opacity for the dataset. They can be the default values,
2256	# the style hints loaded with the dataset, or set by user controls. As
2257	# datasets get loaded, they first use the defaults that are overidden
2258	# by the style hints. If the user changes the global controls, then that
2259	# overrides everything else. I don't know what it means when global
2260	# controls are specified as style hints by each dataset. It complicates
2261	# the code to handle aberrant cases.
2262
2263	if { $_changed(opacity) } {
2264	set style(-opacity) $_settings(opacity)
2265	}
2266	if { $_changed(numIsolines) } {
2267	set style(-levels) $_settings(numIsolines)
2268	}
2269	if { $_changed(colormap) } {
2270	set style(-color) $_settings(colormap)
2271	}
2272	if { $_currentColormap == "" } {
2273	$itk_component(colormap) value $style(-color)
2274	}
2275	set _currentOpacity $style(-opacity)
2276	if { $_currentNumIsolines != $style(-levels) } {
2277	set _currentNumIsolines $style(-levels)
2278	set _settings(numIsolines) $_currentNumIsolines
2279	$itk_component(numisolines) value $_currentNumIsolines
2280	UpdateContourList
2281	DrawLegend
2282	}
2283	SendCmd "outline add $tag"
2284	SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
2285	SendCmd "outline visible $_settings(outline) $tag"
2286	set scale [GetHeightmapScale]
2287	SendCmd "[list heightmap add contourlist $_contourList $scale $tag]"
2288	set _comp2scale($tag) $_settings(heightmapScale)
2289	SendCmd "heightmap edges $_settings(edges) $tag"
2290	SendCmd "heightmap wireframe $_settings(wireframe) $tag"
2291	SetCurrentColormap $style(-color)
2292	set color [$itk_component(isolinecolor) value]
2293	SendCmd "heightmap isolinecolor [Color2RGB $color] $tag"
2294	SendCmd "heightmap lighting $_settings(isHeightmap) $tag"
2295	}
2296
2297	itcl::body Rappture::VtkHeightmapViewer::IsValidObject { dataobj } {
2298	if {[catch {$dataobj isa Rappture::Field} valid] != 0 \|\| !$valid} {
2299	return 0
2300	}
2301	return 1
2302	}
2303
2304	# ----------------------------------------------------------------------
2305	# USAGE: ReceiveLegend <colormap> <title> <min> <max> <size>
2306	#
2307	# Invoked automatically whenever the "legend" command comes in from
2308	# the rendering server. Indicates that binary image data with the
2309	# specified <size> will follow.
2310	# ----------------------------------------------------------------------
2311	itcl::body Rappture::VtkHeightmapViewer::ReceiveLegend { colormap title min max size } {
2312	#puts stderr "ReceiveLegend colormap=$colormap title=$title range=$min,$max size=$size"
2313	if { [isconnected] } {
2314	set bytes [ReceiveBytes $size]
2315	if { ![info exists _image(legend)] } {
2316	set _image(legend) [image create photo]
2317	}
2318	$_image(legend) configure -data $bytes
2319	#puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2320	if { [catch {DrawLegend} errs] != 0 } {
2321	global errorInfo
2322	puts stderr "errs=$errs errorInfo=$errorInfo"
2323	}
2324	}
2325	}
2326
2327	#
2328	# DrawLegend --
2329	#
2330	# Draws the legend in the own canvas on the right side of the plot area.
2331	#
2332	itcl::body Rappture::VtkHeightmapViewer::DrawLegend {} {
2333	set fname $_curFldName
2334	set c $itk_component(view)
2335	set w [winfo width $c]
2336	set h [winfo height $c]
2337	set font "Arial 8"
2338	set lineht [font metrics $font -linespace]
2339
2340	if { [string match "component*" $fname] } {
2341	set title ""
2342	} else {
2343	if { [info exists _fields($fname)] } {
2344	foreach { title units } $_fields($fname) break
2345	if { $units != "" } {
2346	set title [format "%s (%s)" $title $units]
2347	}
2348	} else {
2349	set title $fname
2350	}
2351	}
2352	set x [expr $w - 2]
2353	if { !$_settings(legendVisible) } {
2354	$c delete legend
2355	return
2356	}
2357	if { [$c find withtag "legend"] == "" } {
2358	set y 2
2359	# If there's a legend title, create a text item for the title.
2360	$c create text $x $y \
2361	-anchor ne \
2362	-fill $itk_option(-plotforeground) -tags "title legend" \
2363	-font $font
2364	$c create text $x $y \
2365	-anchor ne \
2366	-fill $itk_option(-plotforeground) -tags "vmax legend" \
2367	-font $font
2368	incr y $lineht
2369	$c create image $x $y \
2370	-anchor ne \
2371	-image $_image(legend) -tags "colormap legend"
2372	$c create rectangle $x $y 1 1 \
2373	-fill "" -outline "" -tags "sensor legend"
2374	$c create text $x [expr {$h-2}] \
2375	-anchor se \
2376	-fill $itk_option(-plotforeground) -tags "vmin legend" \
2377	-font $font
2378	$c bind sensor <Enter> [itcl::code $this EnterLegend %x %y]
2379	$c bind sensor <Leave> [itcl::code $this LeaveLegend]
2380	$c bind sensor <Motion> [itcl::code $this MotionLegend %x %y]
2381	}
2382	$c delete isoline
2383	set x2 $x
2384	set iw [image width $_image(legend)]
2385	set ih [image height $_image(legend)]
2386	set x1 [expr $x2 - ($iw*12)/10]
2387	set color [$itk_component(isolinecolor) value]
2388
2389	# Draw the isolines on the legend.
2390	if { $color != "none" && [info exists _limits($_curFldName)] &&
2391	$_settings(isolinesVisible) && $_currentNumIsolines > 0 } {
2392
2393	foreach { vmin vmax } $_limits($_curFldName) break
2394	set range [expr double($vmax - $vmin)]
2395	if { $range <= 0.0 } {
2396	set range 1.0; # Min is greater or equal to max.
2397	}
2398	set tags "isoline legend"
2399	set offset [expr 2 + $lineht]
2400	if { $title != "" } {
2401	incr offset $lineht
2402	}
2403	foreach value $_contourList {
2404	set norm [expr 1.0 - (($value - $vmin) / $range)]
2405	set y1 [expr int(round(($norm * $ih) + $offset))]
2406	for { set off 0 } { $off < 3 } { incr off } {
2407	set _isolines([expr $y1 + $off]) $value
2408	set _isolines([expr $y1 - $off]) $value
2409	}
2410	$c create line $x1 $y1 $x2 $y1 -fill $color -tags $tags
2411	}
2412	}
2413
2414	$c bind title <ButtonPress> [itcl::code $this Combo post]
2415	$c bind title <Enter> [itcl::code $this Combo activate]
2416	$c bind title <Leave> [itcl::code $this Combo deactivate]
2417	# Reset the item coordinates according the current size of the plot.
2418	if { [info exists _limits($_curFldName)] } {
2419	foreach { vmin vmax } $_limits($_curFldName) break
2420	$c itemconfigure vmin -text [format %g $vmin]
2421	$c itemconfigure vmax -text [format %g $vmax]
2422	}
2423	set y 2
2424	# If there's a legend title, move the title to the correct position
2425	if { $title != "" } {
2426	$c itemconfigure title -text $title
2427	$c coords title $x $y
2428	incr y $lineht
2429	}
2430	$c coords vmax $x $y
2431	incr y $lineht
2432	$c coords colormap $x $y
2433	set ix [image width $_image(legend)]
2434	set ih [image height $_image(legend)]
2435	$c coords sensor [expr $x - $iw] $y $x [expr $y + $ih]
2436	$c raise sensor
2437	$c coords vmin $x [expr {$h - 2}]
2438	}
2439
2440	#
2441	# EnterLegend --
2442	#
2443	itcl::body Rappture::VtkHeightmapViewer::EnterLegend { x y } {
2444	SetLegendTip $x $y
2445	}
2446
2447	#
2448	# MotionLegend --
2449	#
2450	itcl::body Rappture::VtkHeightmapViewer::MotionLegend { x y } {
2451	Rappture::Tooltip::tooltip cancel
2452	set c $itk_component(view)
2453	set cw [winfo width $c]
2454	set ch [winfo height $c]
2455	if { $x >= 0 && $x < $cw && $y >= 0 && $y < $ch } {
2456	SetLegendTip $x $y
2457	}
2458	}
2459
2460	#
2461	# LeaveLegend --
2462	#
2463	itcl::body Rappture::VtkHeightmapViewer::LeaveLegend { } {
2464	Rappture::Tooltip::tooltip cancel
2465	.rappturetooltip configure -icon ""
2466	}
2467
2468	#
2469	# SetLegendTip --
2470	#
2471	itcl::body Rappture::VtkHeightmapViewer::SetLegendTip { x y } {
2472	set fname $_curFldName
2473	set c $itk_component(view)
2474	set w [winfo width $c]
2475	set h [winfo height $c]
2476	set font "Arial 8"
2477	set lineht [font metrics $font -linespace]
2478
2479	set ih [image height $_image(legend)]
2480	# Subtract off the offset of the color ramp from the top of the canvas
2481	set iy [expr $y - ($lineht + 2)]
2482
2483	if { [string match "component*" $fname] } {
2484	set title ""
2485	} else {
2486	if { [info exists _fields($fname)] } {
2487	foreach { title units } $_fields($fname) break
2488	if { $units != "" } {
2489	set title [format "%s (%s)" $title $units]
2490	}
2491	} else {
2492	set title $fname
2493	}
2494	}
2495	# If there's a legend title, increase the offset by the line height.
2496	if { $title != "" } {
2497	incr iy -$lineht
2498	}
2499
2500	# Make a swatch of the selected color
2501	if { [catch { $_image(legend) get 10 $iy } pixel] != 0 } {
2502	return
2503	}
2504
2505	if { ![info exists _image(swatch)] } {
2506	set _image(swatch) [image create photo -width 24 -height 24]
2507	}
2508	set color [eval format "\#%02x%02x%02x" $pixel]
2509	$_image(swatch) put black -to 0 0 23 23
2510	$_image(swatch) put $color -to 1 1 22 22
2511
2512	# Compute the value of the point
2513	if { [info exists _limits($fname)] } {
2514	foreach { vmin vmax } $_limits($fname) break
2515	set t [expr 1.0 - (double($iy) / double($ih-1))]
2516	set value [expr $t * ($vmax - $vmin) + $vmin]
2517	} else {
2518	set value 0.0
2519	}
2520	set tipx [expr $x + 15]
2521	set tipy [expr $y - 5]
2522	.rappturetooltip configure -icon $_image(swatch)
2523	if { [info exists _isolines($y)] } {
2524	Rappture::Tooltip::text $c [format "$title %g (isoline)" $_isolines($y)]
2525	} else {
2526	Rappture::Tooltip::text $c [format "$title %g" $value]
2527	}
2528	Rappture::Tooltip::tooltip show $c +$tipx,+$tipy
2529	}
2530
2531	# ----------------------------------------------------------------------
2532	# USAGE: _dropdown post
2533	# USAGE: _dropdown unpost
2534	# USAGE: _dropdown select
2535	#
2536	# Used internally to handle the dropdown list for this combobox. The
2537	# post/unpost options are invoked when the list is posted or unposted
2538	# to manage the relief of the controlling button. The select option
2539	# is invoked whenever there is a selection from the list, to assign
2540	# the value back to the gauge.
2541	# ----------------------------------------------------------------------
2542	itcl::body Rappture::VtkHeightmapViewer::Combo {option} {
2543	set c $itk_component(view)
2544	switch -- $option {
2545	post {
2546	foreach { x1 y1 x2 y2 } [$c bbox title] break
2547	set x1 [expr [winfo width $itk_component(view)] - [winfo reqwidth $itk_component(fieldmenu)]]
2548	set x [expr $x1 + [winfo rootx $itk_component(view)]]
2549	set y [expr $y2 + [winfo rooty $itk_component(view)]]
2550	tk_popup $itk_component(fieldmenu) $x $y
2551	}
2552	activate {
2553	$c itemconfigure title -fill red
2554	}
2555	deactivate {
2556	$c itemconfigure title -fill $itk_option(-plotforeground)
2557	}
2558	invoke {
2559	$itk_component(field) value $_curFldLabel
2560	AdjustSetting field
2561	}
2562	default {
2563	error "bad option \"$option\": should be post, unpost, select"
2564	}
2565	}
2566	}
2567
2568	itcl::body Rappture::VtkHeightmapViewer::GetHeightmapScale {} {
2569	if { $_settings(isHeightmap) } {
2570	set val $_settings(heightmapScale)
2571	set sval [expr { $val >= 50 ? double($val)/50.0 : 1.0/(2.0-(double($val)/50.0)) }]
2572	return $sval
2573	}
2574	set sval 0
2575	}
2576
2577	itcl::body Rappture::VtkHeightmapViewer::SetOrientation { side } {
2578	array set positions {
2579	front "0.707107 0.707107 0 0"
2580	back "0 0 0.707107 0.707107"
2581	left "0.5 0.5 -0.5 -0.5"
2582	right "0.5 0.5 0.5 0.5"
2583	top "1 0 0 0"
2584	bottom "0 1 0 0"
2585	}
2586	foreach name { qw qx qy qz } value $positions($side) {
2587	set _view($name) $value
2588	}
2589	set q [list $_view(qw) $_view(qx) $_view(qy) $_view(qz)]
2590	$_arcball quaternion $q
2591	SendCmd "camera orient $q"
2592	SendCmd "camera reset"
2593	set _view(xpan) 0
2594	set _view(ypan) 0
2595	set _view(zoom) 1.0
2596	}
2597
2598	itcl::body Rappture::VtkHeightmapViewer::UpdateContourList {} {
2599	if { ![info exists _limits($_curFldName)] } {
2600	return
2601	}
2602	foreach { vmin vmax } $_limits($_curFldName) break
2603	set v [blt::vector create \#auto]
2604	$v seq $vmin $vmax [expr $_currentNumIsolines+2]
2605	$v delete end 0
2606	set _contourList [$v range 0 end]
2607	blt::vector destroy $v
2608	}

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