source: trunk/gui/scripts/vtksurfaceviewer.tcl @ 5156

Last change on this file since 5156 was 5156, checked in by ldelgass, 5 years ago

connection reset fixes

File size: 77.9 KB
Line 
1# -*- mode: tcl; indent-tabs-mode: nil -*-
2# ----------------------------------------------------------------------
3#  COMPONENT: vtksurfaceviewer - Vtk 3D boundary surface 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# ======================================================================
14package require Itk
15package require BLT
16#package require Img
17
18option add *VtkSurfaceViewer.width 4i widgetDefault
19option add *VtkSurfaceViewer*cursor crosshair widgetDefault
20option add *VtkSurfaceViewer.height 4i widgetDefault
21option add *VtkSurfaceViewer.foreground black widgetDefault
22option add *VtkSurfaceViewer.controlBackground gray widgetDefault
23option add *VtkSurfaceViewer.controlDarkBackground #999999 widgetDefault
24option add *VtkSurfaceViewer.plotBackground black widgetDefault
25option add *VtkSurfaceViewer.plotForeground white widgetDefault
26option add *VtkSurfaceViewer.font \
27    -*-helvetica-medium-r-normal-*-12-* widgetDefault
28
29# must use this name -- plugs into Rappture::resources::load
30proc VtkSurfaceViewer_init_resources {} {
31    Rappture::resources::register \
32        vtkvis_server Rappture::VtkSurfaceViewer::SetServerList
33}
34
35itcl::class Rappture::VtkSurfaceViewer {
36    inherit Rappture::VisViewer
37
38    itk_option define -plotforeground plotForeground Foreground ""
39    itk_option define -plotbackground plotBackground Background ""
40
41    constructor { hostlist args } {
42        Rappture::VisViewer::constructor $hostlist
43    } {
44        # defined below
45    }
46    destructor {
47        # defined below
48    }
49    public proc SetServerList { namelist } {
50        Rappture::VisViewer::SetServerList "vtkvis" $namelist
51    }
52    public method add {dataobj {settings ""}}
53    public method camera {option args}
54    public method delete {args}
55    public method disconnect {}
56    public method download {option args}
57    public method get {args}
58    public method isconnected {}
59    public method parameters {title args} {
60        # do nothing
61    }
62    public method scale {args}
63
64    # The following methods are only used by this class.
65    private method AdjustSetting {what {value ""}}
66    private method BuildAxisTab {}
67    private method BuildCameraTab {}
68    private method BuildColormap { name }
69    private method BuildDownloadPopup { widget command }
70    private method BuildSurfaceTab {}
71    private method Combo { option }
72    private method Connect {}
73    private method CurrentDatasets {args}
74    private method Disconnect {}
75    private method DoResize {}
76    private method DoRotate {}
77    private method DrawLegend {}
78    private method EnterLegend { x y }
79    private method EventuallyRequestLegend {}
80    private method EventuallyResize { w h }
81    private method EventuallyRotate { q }
82    private method GetImage { args }
83    private method GetVtkData { args }
84    private method InitSettings { args  }
85    private method IsValidObject { dataobj }
86    private method LeaveLegend {}
87    private method MotionLegend { x y }
88    private method Pan {option x y}
89    private method PanCamera {}
90    private method Pick {x y}
91    private method QuaternionToView { q } {
92        foreach { _view(-qw) _view(-qx) _view(-qy) _view(-qz) } $q break
93    }
94    private method Rebuild {}
95    private method ReceiveDataset { args }
96    private method ReceiveImage { args }
97    private method ReceiveLegend { colormap title vmin vmax size }
98    private method RequestLegend {}
99    private method Rotate {option x y}
100    private method SetCurrentColormap { color }
101    private method SetLegendTip { x y }
102    private method SetObjectStyle { dataobj comp }
103    private method SetOrientation { side }
104    private method UpdateContourList {}
105    private method ViewToQuaternion {} {
106        return [list $_view(-qw) $_view(-qx) $_view(-qy) $_view(-qz)]
107    }
108    private method Zoom {option}
109
110    private variable _arcball ""
111
112    private variable _dlist ""     ;    # list of data objects
113    private variable _obj2datasets
114    private variable _obj2ovride   ;    # maps dataobj => style override
115    private variable _datasets     ;    # contains all the dataobj-component
116                                   ;    # datasets in the server
117    private variable _colormaps    ;    # contains all the colormaps
118                                   ;    # in the server.
119    # The name of the current colormap used.  The colormap is global to all
120    # heightmaps displayed.
121    private variable _currentColormap ""
122    private variable _currentNumContours -1
123
124    private variable _dataset2style    ;# maps dataobj-component to transfunc
125
126    private variable _click        ;    # info used for rotate operations
127    private variable _limits       ;    # autoscale min/max for all axes
128    private variable _view         ;    # view params for 3D view
129    private variable _settings
130    private variable _style;            # Array of current component styles.
131    private variable _changed
132    private variable _initialStyle;     # Array of initial component styles.
133    private variable _reset 1;          # Connection to server has been reset.
134
135    private variable _first ""     ;    # This is the topmost dataset.
136    private variable _start 0
137    private variable _title ""
138    private variable _isolines
139    private variable _contourList ""
140
141    common _downloadPopup;              # download options from popup
142    private common _hardcopy
143    private variable _width 0
144    private variable _height 0
145    private variable _resizePending 0
146    private variable _rotatePending 0
147    private variable _legendPending 0
148    private variable _field      ""
149    private variable _colorMode "scalar";        #  Mode of colormap (vmag or scalar)
150    private variable _fieldNames {}
151    private variable _fields
152    private variable _curFldName ""
153    private variable _curFldLabel ""
154}
155
156itk::usual VtkSurfaceViewer {
157    keep -background -foreground -cursor -font
158    keep -plotbackground -plotforeground
159}
160
161# ----------------------------------------------------------------------
162# CONSTRUCTOR
163# ----------------------------------------------------------------------
164itcl::body Rappture::VtkSurfaceViewer::constructor {hostlist args} {
165    package require vtk
166    set _serverType "vtkvis"
167
168    # Rebuild event
169    $_dispatcher register !rebuild
170    $_dispatcher dispatch $this !rebuild "[itcl::code $this Rebuild]; list"
171
172    # Resize event
173    $_dispatcher register !resize
174    $_dispatcher dispatch $this !resize "[itcl::code $this DoResize]; list"
175
176    # Rotate event
177    $_dispatcher register !rotate
178    $_dispatcher dispatch $this !rotate "[itcl::code $this DoRotate]; list"
179
180    # Legend event
181    $_dispatcher register !legend
182    $_dispatcher dispatch $this !legend "[itcl::code $this RequestLegend]; list"
183
184    #
185    # Populate parser with commands handle incoming requests
186    #
187    $_parser alias image [itcl::code $this ReceiveImage]
188    $_parser alias dataset [itcl::code $this ReceiveDataset]
189    $_parser alias legend [itcl::code $this ReceiveLegend]
190
191    # Initialize the view to some default parameters.
192    array set _view {
193        -ortho           0
194        -qw              0.853553
195        -qx              -0.353553
196        -qy              0.353553
197        -qz              0.146447
198        -xpan            0
199        -ypan            0
200        -zoom            1.0
201    }
202    set _arcball [blt::arcball create 100 100]
203    $_arcball quaternion [ViewToQuaternion]
204
205    array set _settings {
206        -axesvisible                1
207        -axislabels                 1
208        -axisminorticks             1
209        -axismode                   "static"
210        -background                 black
211        -colormap                   BCGYR
212        -colormapvisible            1
213        -field                      "Default"
214        -isolinecolor               white
215        -isolinesvisible            0
216        -legendvisible              1
217        -numcontours                10
218        -surfaceedges               0
219        -surfacelighting            1
220        -surfaceopacity             100
221        -outline                    0
222        -surfacevisible             1
223        -surfacewireframe           0
224        -xgrid                      0
225        -ygrid                      0
226        -zgrid                      0
227    }
228    array set _changed {
229        -colormap                0
230        -numcontours             0
231        -surfaceopacity          0
232    }
233
234    itk_component add view {
235        canvas $itk_component(plotarea).view \
236            -highlightthickness 0 -borderwidth 0
237    } {
238        usual
239        ignore -highlightthickness -borderwidth  -background
240    }
241
242    itk_component add fieldmenu {
243        menu $itk_component(plotarea).menu -bg black -fg white -relief flat \
244            -tearoff 0
245    } {
246        usual
247        ignore -background -foreground -relief -tearoff
248    }
249    set c $itk_component(view)
250    bind $c <Configure> [itcl::code $this EventuallyResize %w %h]
251    bind $c <4> [itcl::code $this Zoom in 0.25]
252    bind $c <5> [itcl::code $this Zoom out 0.25]
253    bind $c <KeyPress-Left>  [list %W xview scroll 10 units]
254    bind $c <KeyPress-Right> [list %W xview scroll -10 units]
255    bind $c <KeyPress-Up>    [list %W yview scroll 10 units]
256    bind $c <KeyPress-Down>  [list %W yview scroll -10 units]
257    bind $c <Enter> "focus %W"
258    bind $c <Control-F1> [itcl::code $this ToggleConsole]
259
260    # Fix the scrollregion in case we go off screen
261    $c configure -scrollregion [$c bbox all]
262
263    set _map(id) [$c create image 0 0 -anchor nw -image $_image(plot)]
264    set _map(cwidth) -1
265    set _map(cheight) -1
266    set _map(zoom) 1.0
267    set _map(original) ""
268
269    set f [$itk_component(main) component controls]
270    itk_component add reset {
271        button $f.reset -borderwidth 1 -padx 1 -pady 1 \
272            -highlightthickness 0 \
273            -image [Rappture::icon reset-view] \
274            -command [itcl::code $this Zoom reset]
275    } {
276        usual
277        ignore -highlightthickness
278    }
279    pack $itk_component(reset) -side top -padx 2 -pady 2
280    Rappture::Tooltip::for $itk_component(reset) \
281        "Reset the view to the default zoom level"
282
283    itk_component add zoomin {
284        button $f.zin -borderwidth 1 -padx 1 -pady 1 \
285            -highlightthickness 0 \
286            -image [Rappture::icon zoom-in] \
287            -command [itcl::code $this Zoom in]
288    } {
289        usual
290        ignore -highlightthickness
291    }
292    pack $itk_component(zoomin) -side top -padx 2 -pady 2
293    Rappture::Tooltip::for $itk_component(zoomin) "Zoom in"
294
295    itk_component add zoomout {
296        button $f.zout -borderwidth 1 -padx 1 -pady 1 \
297            -highlightthickness 0 \
298            -image [Rappture::icon zoom-out] \
299            -command [itcl::code $this Zoom out]
300    } {
301        usual
302        ignore -highlightthickness
303    }
304    pack $itk_component(zoomout) -side top -padx 2 -pady 2
305    Rappture::Tooltip::for $itk_component(zoomout) "Zoom out"
306
307    itk_component add surface {
308        Rappture::PushButton $f.surface \
309            -onimage [Rappture::icon volume-on] \
310            -offimage [Rappture::icon volume-off] \
311            -variable [itcl::scope _settings(-surfacevisible)] \
312            -command [itcl::code $this AdjustSetting -surfacevisible]
313    }
314    $itk_component(surface) select
315    Rappture::Tooltip::for $itk_component(surface) \
316        "Hide the surface"
317    pack $itk_component(surface) -padx 2 -pady 2
318
319    if { [catch {
320        BuildSurfaceTab
321        BuildAxisTab
322        BuildCameraTab
323    } errs] != 0 } {
324        puts stderr errs=$errs
325    }
326
327    # Legend
328    set _image(legend) [image create photo]
329    itk_component add legend {
330        canvas $itk_component(plotarea).legend -width 50 -highlightthickness 0
331    } {
332        usual
333        ignore -highlightthickness
334        rename -background -plotbackground plotBackground Background
335    }
336
337    # Hack around the Tk panewindow.  The problem is that the requested
338    # size of the 3d view isn't set until an image is retrieved from
339    # the server.  So the panewindow uses the tiny size.
340    set w 10000
341    pack forget $itk_component(view)
342    blt::table $itk_component(plotarea) \
343        0,0 $itk_component(view) -fill both -reqwidth $w
344    blt::table configure $itk_component(plotarea) c1 -resize none
345
346    # Bindings for rotation via mouse
347    bind $itk_component(view) <ButtonPress-1> \
348        [itcl::code $this Rotate click %x %y]
349    bind $itk_component(view) <B1-Motion> \
350        [itcl::code $this Rotate drag %x %y]
351    bind $itk_component(view) <ButtonRelease-1> \
352        [itcl::code $this Rotate release %x %y]
353
354    # Bindings for panning via mouse
355    bind $itk_component(view) <ButtonPress-2> \
356        [itcl::code $this Pan click %x %y]
357    bind $itk_component(view) <B2-Motion> \
358        [itcl::code $this Pan drag %x %y]
359    bind $itk_component(view) <ButtonRelease-2> \
360        [itcl::code $this Pan release %x %y]
361
362    #bind $itk_component(view) <ButtonRelease-3> \
363    #    [itcl::code $this Pick %x %y]
364
365    # Bindings for panning via keyboard
366    bind $itk_component(view) <KeyPress-Left> \
367        [itcl::code $this Pan set -10 0]
368    bind $itk_component(view) <KeyPress-Right> \
369        [itcl::code $this Pan set 10 0]
370    bind $itk_component(view) <KeyPress-Up> \
371        [itcl::code $this Pan set 0 -10]
372    bind $itk_component(view) <KeyPress-Down> \
373        [itcl::code $this Pan set 0 10]
374    bind $itk_component(view) <Shift-KeyPress-Left> \
375        [itcl::code $this Pan set -2 0]
376    bind $itk_component(view) <Shift-KeyPress-Right> \
377        [itcl::code $this Pan set 2 0]
378    bind $itk_component(view) <Shift-KeyPress-Up> \
379        [itcl::code $this Pan set 0 -2]
380    bind $itk_component(view) <Shift-KeyPress-Down> \
381        [itcl::code $this Pan set 0 2]
382
383    # Bindings for zoom via keyboard
384    bind $itk_component(view) <KeyPress-Prior> \
385        [itcl::code $this Zoom out]
386    bind $itk_component(view) <KeyPress-Next> \
387        [itcl::code $this Zoom in]
388
389    bind $itk_component(view) <Enter> "focus $itk_component(view)"
390
391    if {[string equal "x11" [tk windowingsystem]]} {
392        # Bindings for zoom via mouse
393        bind $itk_component(view) <4> [itcl::code $this Zoom out]
394        bind $itk_component(view) <5> [itcl::code $this Zoom in]
395    }
396
397    set _image(download) [image create photo]
398
399    eval itk_initialize $args
400
401    EnableWaitDialog 900
402    Connect
403}
404
405# ----------------------------------------------------------------------
406# DESTRUCTOR
407# ----------------------------------------------------------------------
408itcl::body Rappture::VtkSurfaceViewer::destructor {} {
409    Disconnect
410    image delete $_image(plot)
411    image delete $_image(download)
412    catch { blt::arcball destroy $_arcball }
413}
414
415itcl::body Rappture::VtkSurfaceViewer::DoResize {} {
416    if { $_width < 2 } {
417        set _width 500
418    }
419    if { $_height < 2 } {
420        set _height 500
421    }
422    set _start [clock clicks -milliseconds]
423    SendCmd "screen size $_width $_height"
424
425    EventuallyRequestLegend
426    set _resizePending 0
427}
428
429itcl::body Rappture::VtkSurfaceViewer::DoRotate {} {
430    SendCmd "camera orient [ViewToQuaternion]"
431    set _rotatePending 0
432}
433
434itcl::body Rappture::VtkSurfaceViewer::EventuallyRequestLegend {} {
435    if { !$_legendPending } {
436        set _legendPending 1
437        $_dispatcher event -idle !legend
438    }
439}
440
441itcl::body Rappture::VtkSurfaceViewer::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 400 !resize
448    }
449}
450
451set rotate_delay 100
452
453itcl::body Rappture::VtkSurfaceViewer::EventuallyRotate { q } {
454    QuaternionToView $q
455    if { !$_rotatePending } {
456        set _rotatePending 1
457        global rotate_delay
458        $_dispatcher event -after $rotate_delay !rotate
459    }
460}
461
462# ----------------------------------------------------------------------
463# USAGE: add <dataobj> ?<settings>?
464#
465# Clients use this to add a data object to the plot.  The optional
466# <settings> are used to configure the plot.  Allowed settings are
467# -color, -brightness, -width, -linestyle, and -raise.
468# ----------------------------------------------------------------------
469itcl::body Rappture::VtkSurfaceViewer::add {dataobj {settings ""}} {
470    if { ![$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    array set params $settings
487
488    if {$params(-color) == "auto" || $params(-color) == "autoreset"} {
489        # can't handle -autocolors yet
490        set params(-color) black
491    }
492    set pos [lsearch -exact $_dlist $dataobj]
493    if {$pos < 0} {
494        lappend _dlist $dataobj
495    }
496    set _obj2ovride($dataobj-color) $params(-color)
497    set _obj2ovride($dataobj-width) $params(-width)
498    set _obj2ovride($dataobj-raise) $params(-raise)
499    $_dispatcher event -idle !rebuild
500}
501
502# ----------------------------------------------------------------------
503# USAGE: delete ?<dataobj1> <dataobj2> ...?
504#
505#       Clients use this to delete a dataobj from the plot.  If no dataobjs
506#       are specified, then all dataobjs are deleted.  No data objects are
507#       deleted.  They are only removed from the display list.
508#
509# ----------------------------------------------------------------------
510itcl::body Rappture::VtkSurfaceViewer::delete {args} {
511    if { [llength $args] == 0} {
512        set args $_dlist
513    }
514    # Delete all specified dataobjs
515    set changed 0
516    foreach dataobj $args {
517        set pos [lsearch -exact $_dlist $dataobj]
518        if { $pos < 0 } {
519            continue;                   # Don't know anything about it.
520        }
521        # Remove it from the dataobj list.
522        set _dlist [lreplace $_dlist $pos $pos]
523        array unset _obj2ovride $dataobj-*
524        array unset _settings $dataobj-*
525        set changed 1
526    }
527    # If anything changed, then rebuild the plot
528    if { $changed } {
529        $_dispatcher event -idle !rebuild
530    }
531}
532
533# ----------------------------------------------------------------------
534# USAGE: get ?-objects?
535# USAGE: get ?-visible?
536# USAGE: get ?-image view?
537#
538# Clients use this to query the list of objects being plotted, in
539# order from bottom to top of this result.  The optional "-image"
540# flag can also request the internal images being shown.
541# ----------------------------------------------------------------------
542itcl::body Rappture::VtkSurfaceViewer::get {args} {
543    if {[llength $args] == 0} {
544        set args "-objects"
545    }
546
547    set op [lindex $args 0]
548    switch -- $op {
549        "-objects" {
550            # put the dataobj list in order according to -raise options
551            set dlist {}
552            foreach dataobj $_dlist {
553                if { ![IsValidObject $dataobj] } {
554                    continue
555                }
556                if {[info exists _obj2ovride($dataobj-raise)] &&
557                    $_obj2ovride($dataobj-raise)} {
558                    set dlist [linsert $dlist 0 $dataobj]
559                } else {
560                    lappend dlist $dataobj
561                }
562            }
563            return $dlist
564        }
565        "-visible" {
566            set dlist {}
567            foreach dataobj $_dlist {
568                if { ![IsValidObject $dataobj] } {
569                    continue
570                }
571                if { ![info exists _obj2ovride($dataobj-raise)] } {
572                    # No setting indicates that the object isn't visible.
573                    continue
574                }
575                # Otherwise use the -raise parameter to put the object to
576                # the front of the list.
577                if { $_obj2ovride($dataobj-raise) } {
578                    set dlist [linsert $dlist 0 $dataobj]
579                } else {
580                    lappend dlist $dataobj
581                }
582            }
583            return $dlist
584        }
585        -image {
586            if {[llength $args] != 2} {
587                error "wrong # args: should be \"get -image view\""
588            }
589            switch -- [lindex $args end] {
590                view {
591                    return $_image(plot)
592                }
593                default {
594                    error "bad image name \"[lindex $args end]\": should be view"
595                }
596            }
597        }
598        default {
599            error "bad option \"$op\": should be -objects or -image"
600        }
601    }
602}
603
604# ----------------------------------------------------------------------
605# USAGE: scale ?<data1> <data2> ...?
606#
607# Sets the default limits for the overall plot according to the
608# limits of the data for all of the given <data> objects.  This
609# accounts for all objects--even those not showing on the screen.
610# Because of this, the limits are appropriate for all objects as
611# the user scans through data in the ResultSet viewer.
612# ----------------------------------------------------------------------
613itcl::body Rappture::VtkSurfaceViewer::scale { args } {
614    foreach dataobj $args {
615        if { ![$dataobj isvalid] } {
616            continue;                   # Object doesn't contain valid data.
617        }
618        foreach axis { x y z } {
619            set lim [$dataobj limits $axis]
620            if { ![info exists _limits($axis)] } {
621                set _limits($axis) $lim
622                continue
623            }
624            foreach {min max} $lim break
625            foreach {amin amax} $_limits($axis) break
626            if { $amin > $min } {
627                set amin $min
628            }
629            if { $amax < $max } {
630                set amax $max
631            }
632            set _limits($axis) [list $amin $amax]
633        }
634        foreach { fname lim } [$dataobj fieldlimits] {
635            if { ![info exists _limits($fname)] } {
636                set _limits($fname) $lim
637                continue
638            }
639            foreach {min max} $lim break
640            foreach {fmin fmax} $_limits($fname) break
641            if { $fmin > $min } {
642                set fmin $min
643            }
644            if { $fmax < $max } {
645                set fmax $max
646            }
647            set _limits($fname) [list $fmin $fmax]
648        }
649    }
650}
651
652# ----------------------------------------------------------------------
653# USAGE: download coming
654# USAGE: download controls <downloadCommand>
655# USAGE: download now
656#
657# Clients use this method to create a downloadable representation
658# of the plot.  Returns a list of the form {ext string}, where
659# "ext" is the file extension (indicating the type of data) and
660# "string" is the data itself.
661# ----------------------------------------------------------------------
662itcl::body Rappture::VtkSurfaceViewer::download {option args} {
663    switch $option {
664        coming {
665            if {[catch {
666                blt::winop snap $itk_component(plotarea) $_image(download)
667            }]} {
668                $_image(download) configure -width 1 -height 1
669                $_image(download) put #000000
670            }
671        }
672        controls {
673            set popup .vtkviewerdownload
674            if { ![winfo exists .vtkviewerdownload] } {
675                set inner [BuildDownloadPopup $popup [lindex $args 0]]
676            } else {
677                set inner [$popup component inner]
678            }
679            set _downloadPopup(image_controls) $inner.image_frame
680            set num [llength [get]]
681            set num [expr {($num == 1) ? "1 result" : "$num results"}]
682            set word [Rappture::filexfer::label downloadWord]
683            $inner.summary configure -text "$word $num in the following format:"
684            update idletasks            ;# Fix initial sizes
685            return $popup
686        }
687        now {
688            set popup .vtkviewerdownload
689            if {[winfo exists .vtkviewerdownload]} {
690                $popup deactivate
691            }
692            switch -- $_downloadPopup(format) {
693                "image" {
694                    return [$this GetImage [lindex $args 0]]
695                }
696                "vtk" {
697                    return [$this GetVtkData [lindex $args 0]]
698                }
699            }
700            return ""
701        }
702        default {
703            error "bad option \"$option\": should be coming, controls, now"
704        }
705    }
706}
707
708# ----------------------------------------------------------------------
709# USAGE: Connect ?<host:port>,<host:port>...?
710#
711# Clients use this method to establish a connection to a new
712# server, or to reestablish a connection to the previous server.
713# Any existing connection is automatically closed.
714# ----------------------------------------------------------------------
715itcl::body Rappture::VtkSurfaceViewer::Connect {} {
716    set _hosts [GetServerList "vtkvis"]
717    if { "" == $_hosts } {
718        return 0
719    }
720    set _reset 1
721    set result [VisViewer::Connect $_hosts]
722    if { $result } {
723        if { $_reportClientInfo }  {
724            # Tell the server the viewer, hub, user and session.
725            # Do this immediately on connect before buffering any commands
726            global env
727
728            set info {}
729            set user "???"
730            if { [info exists env(USER)] } {
731                set user $env(USER)
732            }
733            set session "???"
734            if { [info exists env(SESSION)] } {
735                set session $env(SESSION)
736            }
737            lappend info "version" "$Rappture::version"
738            lappend info "build" "$Rappture::build"
739            lappend info "svnurl" "$Rappture::svnurl"
740            lappend info "installdir" "$Rappture::installdir"
741            lappend info "hub" [exec hostname]
742            lappend info "client" "vtksurfaceviewer"
743            lappend info "user" $user
744            lappend info "session" $session
745            SendCmd "clientinfo [list $info]"
746        }
747
748        set w [winfo width $itk_component(view)]
749        set h [winfo height $itk_component(view)]
750        EventuallyResize $w $h
751    }
752    return $result
753}
754
755#
756# isconnected --
757#
758#       Indicates if we are currently connected to the visualization server.
759#
760itcl::body Rappture::VtkSurfaceViewer::isconnected {} {
761    return [VisViewer::IsConnected]
762}
763
764#
765# disconnect --
766#
767itcl::body Rappture::VtkSurfaceViewer::disconnect {} {
768    Disconnect
769    set _reset 1
770}
771
772#
773# Disconnect --
774#
775#       Clients use this method to disconnect from the current rendering
776#       server.
777#
778itcl::body Rappture::VtkSurfaceViewer::Disconnect {} {
779    VisViewer::Disconnect
780
781    $_dispatcher cancel !rebuild
782    $_dispatcher cancel !resize
783    $_dispatcher cancel !rotate
784    $_dispatcher cancel !legend
785    # disconnected -- no more data sitting on server
786    array unset _datasets
787    array unset _data
788    array unset _colormaps
789    array unset _dataset2style
790    array unset _obj2datasets
791}
792
793# ----------------------------------------------------------------------
794# USAGE: ReceiveImage -bytes <size> -type <type> -token <token>
795#
796# Invoked automatically whenever the "image" command comes in from
797# the rendering server.  Indicates that binary image data with the
798# specified <size> will follow.
799# ----------------------------------------------------------------------
800itcl::body Rappture::VtkSurfaceViewer::ReceiveImage { args } {
801    array set info {
802        -token "???"
803        -bytes 0
804        -type image
805    }
806    array set info $args
807    set bytes [ReceiveBytes $info(-bytes)]
808    if { $info(-type) == "image" } {
809        if 0 {
810            set f [open "last.ppm" "w"]
811            fconfigure $f -encoding binary
812            puts -nonewline $f $bytes
813            close $f
814        }
815        $_image(plot) configure -data $bytes
816        #set time [clock seconds]
817        #set date [clock format $time]
818        #set w [image width $_image(plot)]
819        #set h [image height $_image(plot)]
820        #puts stderr "$date: received image ${w}x${h} image"
821        if { $_start > 0 } {
822            set finish [clock clicks -milliseconds]
823            #puts stderr "round trip time [expr $finish -$_start] milliseconds"
824            set _start 0
825        }
826    } elseif { $info(type) == "print" } {
827        set tag $this-print-$info(-token)
828        set _hardcopy($tag) $bytes
829    }
830}
831
832#
833# ReceiveDataset --
834#
835itcl::body Rappture::VtkSurfaceViewer::ReceiveDataset { args } {
836    if { ![isconnected] } {
837        return
838    }
839    set option [lindex $args 0]
840    switch -- $option {
841        "scalar" {
842            set option [lindex $args 1]
843            switch -- $option {
844                "world" {
845                    foreach { x y z value tag } [lrange $args 2 end] break
846                }
847                "pixel" {
848                    foreach { x y value tag } [lrange $args 2 end] break
849                }
850            }
851        }
852        "vector" {
853            set option [lindex $args 1]
854            switch -- $option {
855                "world" {
856                    foreach { x y z vx vy vz tag } [lrange $args 2 end] break
857                }
858                "pixel" {
859                    foreach { x y vx vy vz tag } [lrange $args 2 end] break
860                }
861            }
862        }
863        "names" {
864            foreach { name } [lindex $args 1] {
865                #puts stderr "Dataset: $name"
866            }
867        }
868        default {
869            error "unknown dataset option \"$option\" from server"
870        }
871    }
872}
873
874# ----------------------------------------------------------------------
875# USAGE: Rebuild
876#
877# Called automatically whenever something changes that affects the
878# data in the widget.  Clears any existing data and rebuilds the
879# widget to display new data.
880# ----------------------------------------------------------------------
881itcl::body Rappture::VtkSurfaceViewer::Rebuild {} {
882    set w [winfo width $itk_component(view)]
883    set h [winfo height $itk_component(view)]
884    if { $w < 2 || $h < 2 } {
885        update
886        $_dispatcher event -idle !rebuild
887        return
888    }
889
890    # Turn on buffering of commands to the server.  We don't want to
891    # be preempted by a server disconnect/reconnect (which automatically
892    # generates a new call to Rebuild).
893    StartBufferingCommands
894
895    if { $_reset } {
896        set _width $w
897        set _height $h
898        $_arcball resize $w $h
899        DoResize
900        # Reset the camera and other view parameters
901        $_arcball quaternion [ViewToQuaternion]
902        if {$_view(-ortho)} {
903            SendCmd "camera mode ortho"
904        } else {
905            SendCmd "camera mode persp"
906        }
907        DoRotate
908        PanCamera
909        set _first ""
910        InitSettings -xgrid -ygrid -zgrid -axismode \
911            -axesvisible -axislabels -axisminorticks
912        #SendCmd "axis lformat all %g"
913        StopBufferingCommands
914        SendCmd "imgflush"
915        StartBufferingCommands
916    }
917    set _first ""
918    SendCmd "dataset visible 0"
919    foreach dataobj [get -objects] {
920        if { [info exists _obj2ovride($dataobj-raise)] &&  $_first == "" } {
921            set _first $dataobj
922        }
923        set _obj2datasets($dataobj) ""
924        foreach comp [$dataobj components] {
925            set tag $dataobj-$comp
926            if { ![info exists _datasets($tag)] } {
927                set bytes [$dataobj vtkdata $comp]
928                if 0 {
929                    set f [open "/tmp/surface.vtk" "w"]
930                    fconfigure $f -translation binary -encoding binary
931                    puts -nonewline $f $bytes
932                    close $f
933                }
934                set length [string length $bytes]
935                if { $_reportClientInfo }  {
936                    set info {}
937                    lappend info "tool_id"       [$dataobj hints toolid]
938                    lappend info "tool_name"     [$dataobj hints toolname]
939                    lappend info "tool_title"    [$dataobj hints tooltitle]
940                    lappend info "tool_command"  [$dataobj hints toolcommand]
941                    lappend info "tool_revision" [$dataobj hints toolrevision]
942                    lappend info "dataset_label" [$dataobj hints label]
943                    lappend info "dataset_size"  $length
944                    lappend info "dataset_tag"   $tag
945                    SendCmd "clientinfo [list $info]"
946                }
947                SendCmd "dataset add $tag data follows $length"
948                SendData $bytes
949                set _datasets($tag) 1
950                SetObjectStyle $dataobj $comp
951            }
952            lappend _obj2datasets($dataobj) $tag
953            if { [info exists _obj2ovride($dataobj-raise)] } {
954                # Setting dataset visible enables outline
955                # and contour2d
956                SendCmd "dataset visible 1 $tag"
957            }
958        }
959    }
960
961    if { $_first != "" } {
962        $itk_component(field) choices delete 0 end
963        $itk_component(fieldmenu) delete 0 end
964        array unset _fields
965        set _curFldName ""
966        foreach cname [$_first components] {
967            foreach fname [$_first fieldnames $cname] {
968                if { [info exists _fields($fname)] } {
969                    continue
970                }
971                foreach { label units components } \
972                    [$_first fieldinfo $fname] break
973                $itk_component(field) choices insert end "$fname" "$label"
974                $itk_component(fieldmenu) add radiobutton -label "$label" \
975                    -value $label -variable [itcl::scope _curFldLabel] \
976                    -selectcolor red \
977                    -activebackground $itk_option(-plotbackground) \
978                    -activeforeground $itk_option(-plotforeground) \
979                    -font "Arial 8" \
980                    -command [itcl::code $this Combo invoke]
981                set _fields($fname) [list $label $units $components]
982                if { $_curFldName == "" } {
983                    set _curFldName $fname
984                    set _curFldLabel $label
985                }
986            }
987        }
988        $itk_component(field) value $_curFldLabel
989    }
990    InitSettings -isolinesvisible -surfacevisible -outline
991    if { $_reset } {
992        # These are settings that rely on a dataset being loaded.
993        InitSettings \
994            -surfacelighting \
995            -field \
996            -surfaceedges -surfacelighting -surfaceopacity \
997            -surfacewireframe \
998            -numcontours
999
1000        Zoom reset
1001        foreach axis { x y z } {
1002            set label ""
1003            if { $_first != "" } {
1004                set label [$_first hints ${axis}label]
1005            }
1006            if { $label == "" } {
1007                set label [string toupper $axis]
1008            }
1009            # May be a space in the axis label.
1010            SendCmd [list axis name $axis $label]
1011        }
1012        if { [array size _fields] < 2 } {
1013            catch {blt::table forget $itk_component(field) $itk_component(field_l)}
1014        }
1015        set _reset 0
1016    }
1017
1018    # Actually write the commands to the server socket.  If it fails, we don't
1019    # care.  We're finished here.
1020    blt::busy hold $itk_component(hull)
1021    StopBufferingCommands;              # Turn off buffering and send commands.
1022    blt::busy release $itk_component(hull)
1023}
1024
1025# ----------------------------------------------------------------------
1026# USAGE: CurrentDatasets ?-all -visible? ?dataobjs?
1027#
1028# Returns a list of server IDs for the current datasets being displayed.  This
1029# is normally a single ID, but it might be a list of IDs if the current data
1030# object has multiple components.
1031# ----------------------------------------------------------------------
1032itcl::body Rappture::VtkSurfaceViewer::CurrentDatasets {args} {
1033    set flag [lindex $args 0]
1034    switch -- $flag {
1035        "-all" {
1036            if { [llength $args] > 1 } {
1037                error "CurrentDatasets: can't specify dataobj after \"-all\""
1038            }
1039            set dlist [get -objects]
1040        }
1041        "-visible" {
1042            if { [llength $args] > 1 } {
1043                set dlist {}
1044                set args [lrange $args 1 end]
1045                foreach dataobj $args {
1046                    if { [info exists _obj2ovride($dataobj-raise)] } {
1047                        lappend dlist $dataobj
1048                    }
1049                }
1050            } else {
1051                set dlist [get -visible]
1052            }
1053        }
1054        default {
1055            set dlist $args
1056        }
1057    }
1058    set rlist ""
1059    foreach dataobj $dlist {
1060        foreach comp [$dataobj components] {
1061            set tag $dataobj-$comp
1062            if { [info exists _datasets($tag)] && $_datasets($tag) } {
1063                lappend rlist $tag
1064            }
1065        }
1066    }
1067    return $rlist
1068}
1069
1070# ----------------------------------------------------------------------
1071# USAGE: Zoom in
1072# USAGE: Zoom out
1073# USAGE: Zoom reset
1074#
1075# Called automatically when the user clicks on one of the zoom
1076# controls for this widget.  Changes the zoom for the current view.
1077# ----------------------------------------------------------------------
1078itcl::body Rappture::VtkSurfaceViewer::Zoom {option} {
1079    switch -- $option {
1080        "in" {
1081            set _view(-zoom) [expr {$_view(-zoom)*1.25}]
1082            SendCmd "camera zoom $_view(-zoom)"
1083        }
1084        "out" {
1085            set _view(-zoom) [expr {$_view(-zoom)*0.8}]
1086            SendCmd "camera zoom $_view(-zoom)"
1087        }
1088        "reset" {
1089            array set _view {
1090                -qw      0.853553
1091                -qx      -0.353553
1092                -qy      0.353553
1093                -qz      0.146447
1094                -xpan    0
1095                -ypan    0
1096                -zoom    1.0
1097            }
1098            if { $_first != "" } {
1099                set location [$_first hints camera]
1100                if { $location != "" } {
1101                    array set _view $location
1102                }
1103            }
1104            $_arcball quaternion [ViewToQuaternion]
1105            DoRotate
1106            SendCmd "camera reset"
1107        }
1108    }
1109}
1110
1111itcl::body Rappture::VtkSurfaceViewer::PanCamera {} {
1112    set x $_view(-xpan)
1113    set y $_view(-ypan)
1114    SendCmd "camera pan $x $y"
1115}
1116
1117# ----------------------------------------------------------------------
1118# USAGE: Rotate click <x> <y>
1119# USAGE: Rotate drag <x> <y>
1120# USAGE: Rotate release <x> <y>
1121#
1122# Called automatically when the user clicks/drags/releases in the
1123# plot area.  Moves the plot according to the user's actions.
1124# ----------------------------------------------------------------------
1125itcl::body Rappture::VtkSurfaceViewer::Rotate {option x y} {
1126    switch -- $option {
1127        "click" {
1128            $itk_component(view) configure -cursor fleur
1129            set _click(x) $x
1130            set _click(y) $y
1131        }
1132        "drag" {
1133            if {[array size _click] == 0} {
1134                Rotate click $x $y
1135            } else {
1136                set w [winfo width $itk_component(view)]
1137                set h [winfo height $itk_component(view)]
1138                if {$w <= 0 || $h <= 0} {
1139                    return
1140                }
1141
1142                if {[catch {
1143                    # this fails sometimes for no apparent reason
1144                    set dx [expr {double($x-$_click(x))/$w}]
1145                    set dy [expr {double($y-$_click(y))/$h}]
1146                }]} {
1147                    return
1148                }
1149                if { $dx == 0 && $dy == 0 } {
1150                    return
1151                }
1152                set q [$_arcball rotate $x $y $_click(x) $_click(y)]
1153                EventuallyRotate $q
1154                set _click(x) $x
1155                set _click(y) $y
1156            }
1157        }
1158        "release" {
1159            Rotate drag $x $y
1160            $itk_component(view) configure -cursor ""
1161            catch {unset _click}
1162        }
1163        default {
1164            error "bad option \"$option\": should be click, drag, release"
1165        }
1166    }
1167}
1168
1169itcl::body Rappture::VtkSurfaceViewer::Pick {x y} {
1170    foreach tag [CurrentDatasets -visible] {
1171        SendCmd "dataset getscalar pixel $x $y $tag"
1172    }
1173}
1174
1175# ----------------------------------------------------------------------
1176# USAGE: $this Pan click x y
1177#        $this Pan drag x y
1178#        $this Pan release x y
1179#
1180# Called automatically when the user clicks on one of the zoom
1181# controls for this widget.  Changes the zoom for the current view.
1182# ----------------------------------------------------------------------
1183itcl::body Rappture::VtkSurfaceViewer::Pan {option x y} {
1184    switch -- $option {
1185        "set" {
1186            set w [winfo width $itk_component(view)]
1187            set h [winfo height $itk_component(view)]
1188            set x [expr $x / double($w)]
1189            set y [expr $y / double($h)]
1190            set _view(-xpan) [expr $_view(-xpan) + $x]
1191            set _view(-ypan) [expr $_view(-ypan) + $y]
1192            PanCamera
1193            return
1194        }
1195        "click" {
1196            set _click(x) $x
1197            set _click(y) $y
1198            $itk_component(view) configure -cursor hand1
1199        }
1200        "drag" {
1201            if { ![info exists _click(x)] } {
1202                set _click(x) $x
1203            }
1204            if { ![info exists _click(y)] } {
1205                set _click(y) $y
1206            }
1207            set w [winfo width $itk_component(view)]
1208            set h [winfo height $itk_component(view)]
1209            set dx [expr ($_click(x) - $x)/double($w)]
1210            set dy [expr ($_click(y) - $y)/double($h)]
1211            set _click(x) $x
1212            set _click(y) $y
1213            set _view(-xpan) [expr $_view(-xpan) - $dx]
1214            set _view(-ypan) [expr $_view(-ypan) - $dy]
1215            PanCamera
1216        }
1217        "release" {
1218            Pan drag $x $y
1219            $itk_component(view) configure -cursor ""
1220        }
1221        default {
1222            error "unknown option \"$option\": should set, click, drag, or release"
1223        }
1224    }
1225}
1226
1227# ----------------------------------------------------------------------
1228# USAGE: InitSettings <what> ?<value>?
1229#
1230# Used internally to update rendering settings whenever parameters
1231# change in the popup settings panel.  Sends the new settings off
1232# to the back end.
1233# ----------------------------------------------------------------------
1234itcl::body Rappture::VtkSurfaceViewer::InitSettings { args } {
1235    foreach spec $args {
1236        if { [info exists _settings($_first-$spec)] } {
1237            # Reset global setting with dataobj specific setting
1238            set _settings($spec) $_settings($_first-$spec)
1239        }
1240        AdjustSetting $spec
1241    }
1242}
1243
1244#
1245# AdjustSetting --
1246#
1247#       Changes/updates a specific setting in the widget.  There are
1248#       usually user-setable option.  Commands are sent to the render
1249#       server.
1250#
1251itcl::body Rappture::VtkSurfaceViewer::AdjustSetting {what {value ""}} {
1252    if { ![isconnected] } {
1253        return
1254    }
1255    switch -- $what {
1256        "-axesvisible" {
1257            set bool $_settings($what)
1258            SendCmd "axis visible all $bool"
1259        }
1260        "-axislabels" {
1261            set bool $_settings($what)
1262            SendCmd "axis labels all $bool"
1263        }
1264        "-axisminorticks" {
1265            set bool $_settings($what)
1266            SendCmd "axis minticks all $bool"
1267        }
1268        "-axismode" {
1269            set mode [$itk_component(axisMode) value]
1270            set mode [$itk_component(axisMode) translate $mode]
1271            set _settings($what) $mode
1272            SendCmd "axis flymode $mode"
1273        }
1274        "-background" {
1275            set bgcolor [$itk_component(background) value]
1276            array set fgcolors {
1277                "black" "white"
1278                "white" "black"
1279                "grey"  "black"
1280            }
1281            configure -plotbackground $bgcolor \
1282                -plotforeground $fgcolors($bgcolor)
1283            $itk_component(view) delete "legend"
1284            DrawLegend
1285        }
1286        "-colormap" {
1287            set _changed($what) 1
1288            StartBufferingCommands
1289            set color [$itk_component(colormap) value]
1290            set _settings($what) $color
1291            if { $color == "none" } {
1292                if { $_settings(-colormapvisible) } {
1293                    SendCmd "contour2d colormode constant {}"
1294                    SendCmd "polydata colormode constant {}"
1295                    set _settings(-colormapvisible) 0
1296                }
1297            } else {
1298                if { !$_settings(-colormapvisible) } {
1299                    #SendCmd "contour2d colormode $_colorMode $_curFldName"
1300                    SendCmd "polydata colormode $_colorMode $_curFldName"
1301                    set _settings(-colormapvisible) 1
1302                }
1303                SetCurrentColormap $color
1304                if {$_settings(-colormapdiscrete)} {
1305                    set numColors [expr $_settings(-numcontours) + 1]
1306                    SendCmd "colormap res $numColors $color"
1307                }
1308            }
1309            StopBufferingCommands
1310            EventuallyRequestLegend
1311        }
1312        "-colormapdiscrete" {
1313            set bool $_settings($what)
1314            set numColors [expr $_settings(-numcontours) + 1]
1315            StartBufferingCommands
1316            if {$bool} {
1317                SendCmd "colormap res $numColors"
1318                # Discrete colormap requires preinterp on
1319                SendCmd "polydata preinterp on"
1320            } else {
1321                SendCmd "colormap res default"
1322                # FIXME: add setting for preinterp (default on)
1323                SendCmd "polydata preinterp on"
1324            }
1325            StopBufferingCommands
1326            EventuallyRequestLegend
1327        }
1328        "-field" {
1329            set label [$itk_component(field) value]
1330            set fname [$itk_component(field) translate $label]
1331            set _settings($what) $fname
1332            if { [info exists _fields($fname)] } {
1333                foreach { label units components } $_fields($fname) break
1334                if { $components > 1 } {
1335                    set _colorMode vmag
1336                } else {
1337                    set _colorMode scalar
1338                }
1339                set _curFldName $fname
1340                set _curFldLabel $label
1341            } else {
1342                puts stderr "unknown field \"$fname\""
1343                return
1344            }
1345            SendCmd "dataset scalar $_curFldName"
1346            if { ![info exists _limits($_curFldName)] } {
1347                SendCmd "dataset maprange all"
1348            } else {
1349                SendCmd "dataset maprange explicit $_limits($_curFldName) $_curFldName"
1350            }
1351            #SendCmd "contour2d colormode $_colorMode $_curFldName"
1352            SendCmd "polydata colormode $_colorMode $_curFldName"
1353            SendCmd "camera reset"
1354            UpdateContourList
1355            DrawLegend
1356        }
1357        "-isolinecolor" {
1358            set color [$itk_component(isolineColor) value]
1359            set _settings($what) $color
1360            SendCmd "contour2d linecolor [Color2RGB $color]"
1361            DrawLegend
1362        }
1363        "-isolinesvisible" {
1364            set bool $_settings($what)
1365            SendCmd "contour2d visible $bool"
1366            DrawLegend
1367        }
1368        "-legendvisible" {
1369            if { !$_settings($what) } {
1370                $itk_component(view) delete legend
1371            }
1372            DrawLegend
1373        }
1374        "-numcontours" {
1375            set _settings($what) [$itk_component(numcontours) value]
1376            set _currentNumContours $_settings($what)
1377            UpdateContourList
1378            set _changed($what) 1
1379            SendCmd "contour2d contourlist [list $_contourList]"
1380            if {$_settings(-colormapdiscrete)} {
1381                set numColors [expr $_settings($what) + 1]
1382                SendCmd "colormap res $numColors"
1383                EventuallyRequestLegend
1384            } else {
1385                DrawLegend
1386            }
1387        }
1388        "-outline" {
1389            set bool $_settings($what)
1390            SendCmd "outline visible $bool"
1391        }
1392        "-surfaceedges" {
1393            set bool $_settings($what)
1394            SendCmd "polydata edges $bool"
1395        }
1396        "-surfacelighting" {
1397            set bool $_settings($what)
1398            SendCmd "polydata lighting $bool"
1399        }
1400        "-surfaceopacity" {
1401            set val $_settings($what)
1402            set sval [expr { 0.01 * double($val) }]
1403            SendCmd "polydata opacity $sval"
1404        }
1405        "-surfacevisible" {
1406            set bool $_settings($what)
1407            SendCmd "polydata visible $bool"
1408            if { $bool } {
1409                Rappture::Tooltip::for $itk_component(surface) \
1410                    "Hide the surface"
1411            } else {
1412                Rappture::Tooltip::for $itk_component(surface) \
1413                    "Show the surface"
1414            }
1415            DrawLegend
1416        }
1417        "-surfacewireframe" {
1418            set bool $_settings($what)
1419            SendCmd "polydata wireframe $bool"
1420        }
1421        "-xgrid" - "-ygrid" - "-zgrid" {
1422            set axis [string tolower [string range $what 1 1]]
1423            set bool $_settings($what)
1424            SendCmd "axis grid $axis $bool"
1425        }
1426        default {
1427            error "don't know how to fix $what"
1428        }
1429    }
1430}
1431
1432#
1433# RequestLegend --
1434#
1435#       Request a new legend from the server.  The size of the legend
1436#       is determined from the height of the canvas.
1437#
1438# This should be called when
1439#        1.  A new current colormap is set.
1440#        2.  Window is resized.
1441#        3.  The limits of the data have changed.  (Just need a redraw).
1442#        4.  Number of isolines have changed. (Just need a redraw).
1443#        5.  Legend becomes visible (Just need a redraw).
1444#
1445itcl::body Rappture::VtkSurfaceViewer::RequestLegend {} {
1446    set _legendPending 0
1447    if { ![info exists _fields($_curFldName)] } {
1448        return
1449    }
1450    set fname $_curFldName
1451    set font "Arial 8"
1452    set lineht [font metrics $font -linespace]
1453    set w 12
1454    set h [expr {$_height - 2 * ($lineht + 2)}]
1455    if { $h < 1 } {
1456        return
1457    }
1458    if { [string match "component*" $fname] } {
1459        set title ""
1460    } else {
1461        if { [info exists _fields($fname)] } {
1462            foreach { title units } $_fields($fname) break
1463            if { $units != "" } {
1464                set title [format "%s (%s)" $title $units]
1465            }
1466        } else {
1467            set title $fname
1468        }
1469    }
1470    # If there's a title too, subtract one more line
1471    if { $title != "" } {
1472        incr h -$lineht
1473    }
1474    # Set the legend on the first heightmap dataset.
1475    if { $_currentColormap != ""  } {
1476        set cmap $_currentColormap
1477        if { ![info exists _colormaps($cmap)] } {
1478            BuildColormap $cmap
1479            set _colormaps($cmap) 1
1480        }
1481        #SendCmd "legend $cmap scalar $_curFldName {} $w $h 0"
1482        SendCmd "legend2 $cmap $w $h"
1483    }
1484}
1485
1486# ----------------------------------------------------------------------
1487# CONFIGURATION OPTION: -plotbackground
1488# ----------------------------------------------------------------------
1489itcl::configbody Rappture::VtkSurfaceViewer::plotbackground {
1490    if { [isconnected] } {
1491        set rgb [Color2RGB $itk_option(-plotbackground)]
1492        SendCmd "screen bgcolor $rgb"
1493    }
1494}
1495
1496# ----------------------------------------------------------------------
1497# CONFIGURATION OPTION: -plotforeground
1498# ----------------------------------------------------------------------
1499itcl::configbody Rappture::VtkSurfaceViewer::plotforeground {
1500    if { [isconnected] } {
1501        set rgb [Color2RGB $itk_option(-plotforeground)]
1502        SendCmd "axis color all $rgb"
1503        SendCmd "outline color $rgb"
1504    }
1505}
1506
1507itcl::body Rappture::VtkSurfaceViewer::BuildSurfaceTab {} {
1508
1509    set fg [option get $itk_component(hull) font Font]
1510    #set bfg [option get $itk_component(hull) boldFont Font]
1511
1512    set inner [$itk_component(main) insert end \
1513        -title "Surface Settings" \
1514        -icon [Rappture::icon volume-on]]
1515    $inner configure -borderwidth 4
1516
1517    checkbutton $inner.surface \
1518        -text "Surface" \
1519        -variable [itcl::scope _settings(-surfacevisible)] \
1520        -command [itcl::code $this AdjustSetting -surfacevisible] \
1521        -font "Arial 9"
1522
1523    checkbutton $inner.isolines \
1524        -text "Isolines" \
1525        -variable [itcl::scope _settings(-isolinesvisible)] \
1526        -command [itcl::code $this AdjustSetting -isolinesvisible] \
1527        -font "Arial 9"
1528
1529    checkbutton $inner.colormapDiscrete \
1530        -text "Discrete Colormap" \
1531        -variable [itcl::scope _settings(-colormapdiscrete)] \
1532        -command [itcl::code $this AdjustSetting -colormapdiscrete] \
1533        -font "Arial 9"
1534
1535    checkbutton $inner.wireframe \
1536        -text "Wireframe" \
1537        -variable [itcl::scope _settings(-surfacewireframe)] \
1538        -command [itcl::code $this AdjustSetting -surfacewireframe] \
1539        -font "Arial 9"
1540
1541    checkbutton $inner.lighting \
1542        -text "Enable Lighting" \
1543        -variable [itcl::scope _settings(-surfacelighting)] \
1544        -command [itcl::code $this AdjustSetting -surfacelighting] \
1545        -font "Arial 9"
1546
1547    checkbutton $inner.edges \
1548        -text "Edges" \
1549        -variable [itcl::scope _settings(-surfaceedges)] \
1550        -command [itcl::code $this AdjustSetting -surfaceedges] \
1551        -font "Arial 9"
1552
1553    checkbutton $inner.outline \
1554        -text "Outline" \
1555        -variable [itcl::scope _settings(-outline)] \
1556        -command [itcl::code $this AdjustSetting -outline] \
1557        -font "Arial 9"
1558
1559    checkbutton $inner.legend \
1560        -text "Legend" \
1561        -variable [itcl::scope _settings(-legendvisible)] \
1562        -command [itcl::code $this AdjustSetting -legendvisible] \
1563        -font "Arial 9"
1564
1565    label $inner.linecolor_l -text "Isolines" -font "Arial 9"
1566    itk_component add isolineColor {
1567        Rappture::Combobox $inner.linecolor -width 10 -editable 0
1568    }
1569    $inner.linecolor choices insert end \
1570        "black"              "black"            \
1571        "blue"               "blue"             \
1572        "cyan"               "cyan"             \
1573        "green"              "green"            \
1574        "grey"               "grey"             \
1575        "magenta"            "magenta"          \
1576        "orange"             "orange"           \
1577        "red"                "red"              \
1578        "white"              "white"            \
1579        "none"               "none"
1580
1581    $itk_component(isolineColor) value "white"
1582    bind $inner.linecolor <<Value>> \
1583        [itcl::code $this AdjustSetting -isolinecolor]
1584
1585    label $inner.background_l -text "Background" -font "Arial 9"
1586    itk_component add background {
1587        Rappture::Combobox $inner.background -width 10 -editable 0
1588    }
1589    $inner.background choices insert end \
1590        "black"              "black"            \
1591        "white"              "white"            \
1592        "grey"               "grey"
1593
1594    $itk_component(background) value $_settings(-background)
1595    bind $inner.background <<Value>> \
1596        [itcl::code $this AdjustSetting -background]
1597
1598    label $inner.opacity_l -text "Opacity" -font "Arial 9"
1599    ::scale $inner.opacity -from 0 -to 100 -orient horizontal \
1600        -variable [itcl::scope _settings(-surfaceopacity)] \
1601        -width 10 \
1602        -showvalue off \
1603        -command [itcl::code $this AdjustSetting -surfaceopacity]
1604
1605    itk_component add field_l {
1606        label $inner.field_l -text "Field" -font "Arial 9"
1607    } {
1608        ignore -font
1609    }
1610    itk_component add field {
1611        Rappture::Combobox $inner.field -width 10 -editable 0
1612    }
1613    bind $inner.field <<Value>> \
1614        [itcl::code $this AdjustSetting -field]
1615
1616    label $inner.colormap_l -text "Colormap" -font "Arial 9"
1617    itk_component add colormap {
1618        Rappture::Combobox $inner.colormap -width 10 -editable 0
1619    }
1620    $inner.colormap choices insert end [GetColormapList]
1621
1622    $itk_component(colormap) value "BCGYR"
1623    bind $inner.colormap <<Value>> \
1624        [itcl::code $this AdjustSetting -colormap]
1625
1626    label $inner.numcontours_l -text "Number of Isolines" -font "Arial 9"
1627    itk_component add numcontours {
1628        Rappture::Spinint $inner.numcontours \
1629            -min 0 -max 50 -font "arial 9"
1630    }
1631    $itk_component(numcontours) value $_settings(-numcontours)
1632    bind $itk_component(numcontours) <<Value>> \
1633        [itcl::code $this AdjustSetting -numcontours]
1634
1635    blt::table $inner \
1636        0,0 $inner.field_l   -anchor w -pady 2  \
1637        0,1 $inner.field     -anchor w -pady 2  -fill x \
1638        1,0 $inner.colormap_l -anchor w -pady 2  \
1639        1,1 $inner.colormap   -anchor w -pady 2  -fill x \
1640        2,0 $inner.linecolor_l  -anchor w -pady 2  \
1641        2,1 $inner.linecolor    -anchor w -pady 2 -fill x  \
1642        3,0 $inner.background_l -anchor w -pady 2 \
1643        3,1 $inner.background -anchor w -pady 2  -fill x \
1644        4,0 $inner.numcontours_l -anchor w -pady 2 \
1645        4,1 $inner.numcontours -anchor w -pady 2 \
1646        5,0 $inner.colormapDiscrete -anchor w -pady 2 -cspan 2 \
1647        6,0 $inner.isolines  -anchor w -pady 2 -cspan 2 \
1648        7,0 $inner.wireframe -anchor w -pady 2 -cspan 2 \
1649        8,0 $inner.lighting  -anchor w -pady 2 -cspan 2 \
1650        9,0 $inner.edges     -anchor w -pady 2 -cspan 2 \
1651        10,0 $inner.outline   -anchor w -pady 2 -cspan 2 \
1652        11,0 $inner.legend    -anchor w -pady 2 \
1653        12,0 $inner.opacity_l -anchor w -pady 2 \
1654        12,1 $inner.opacity   -fill x   -pady 2 -fill x \
1655
1656    blt::table configure $inner r* c* -resize none
1657    blt::table configure $inner r13 c1 -resize expand
1658}
1659
1660itcl::body Rappture::VtkSurfaceViewer::BuildAxisTab {} {
1661
1662    set fg [option get $itk_component(hull) font Font]
1663    #set bfg [option get $itk_component(hull) boldFont Font]
1664
1665    set inner [$itk_component(main) insert end \
1666        -title "Axis Settings" \
1667        -icon [Rappture::icon axis2]]
1668    $inner configure -borderwidth 4
1669
1670    checkbutton $inner.visible \
1671        -text "Axes" \
1672        -variable [itcl::scope _settings(-axesvisible)] \
1673        -command [itcl::code $this AdjustSetting -axesvisible] \
1674        -font "Arial 9"
1675
1676    checkbutton $inner.labels \
1677        -text "Axis Labels" \
1678        -variable [itcl::scope _settings(-axislabels)] \
1679        -command [itcl::code $this AdjustSetting -axislabels] \
1680        -font "Arial 9"
1681    label $inner.grid_l -text "Grid" -font "Arial 9"
1682    checkbutton $inner.xgrid \
1683        -text "X" \
1684        -variable [itcl::scope _settings(-xgrid)] \
1685        -command [itcl::code $this AdjustSetting -xgrid] \
1686        -font "Arial 9"
1687    checkbutton $inner.ygrid \
1688        -text "Y" \
1689        -variable [itcl::scope _settings(-ygrid)] \
1690        -command [itcl::code $this AdjustSetting -ygrid] \
1691        -font "Arial 9"
1692    checkbutton $inner.zgrid \
1693        -text "Z" \
1694        -variable [itcl::scope _settings(-zgrid)] \
1695        -command [itcl::code $this AdjustSetting -zgrid] \
1696        -font "Arial 9"
1697    checkbutton $inner.minorticks \
1698        -text "Minor Ticks" \
1699        -variable [itcl::scope _settings(-axisminorticks)] \
1700        -command [itcl::code $this AdjustSetting -axisminorticks] \
1701        -font "Arial 9"
1702
1703    label $inner.mode_l -text "Mode" -font "Arial 9"
1704
1705    itk_component add axisMode {
1706        Rappture::Combobox $inner.mode -width 10 -editable 0
1707    }
1708    $inner.mode choices insert end \
1709        "static_triad"    "static" \
1710        "closest_triad"   "closest" \
1711        "furthest_triad"  "farthest" \
1712        "outer_edges"     "outer"
1713    $itk_component(axisMode) value $_settings(-axismode)
1714    bind $inner.mode <<Value>> [itcl::code $this AdjustSetting -axismode]
1715
1716    blt::table $inner \
1717        0,0 $inner.visible -anchor w -cspan 4 \
1718        1,0 $inner.labels  -anchor w -cspan 4 \
1719        2,0 $inner.minorticks  -anchor w -cspan 4 \
1720        4,0 $inner.grid_l  -anchor w \
1721        4,1 $inner.xgrid   -anchor w \
1722        4,2 $inner.ygrid   -anchor w \
1723        4,3 $inner.zgrid   -anchor w \
1724        5,0 $inner.mode_l  -anchor w -padx { 2 0 } \
1725        5,1 $inner.mode    -fill x   -cspan 3
1726
1727    blt::table configure $inner r* c* -resize none
1728    blt::table configure $inner r7 c6 -resize expand
1729    blt::table configure $inner r3 -height 0.125i
1730}
1731
1732itcl::body Rappture::VtkSurfaceViewer::BuildCameraTab {} {
1733    set inner [$itk_component(main) insert end \
1734        -title "Camera Settings" \
1735        -icon [Rappture::icon camera]]
1736    $inner configure -borderwidth 4
1737
1738    label $inner.view_l -text "view" -font "Arial 9"
1739    set f [frame $inner.view]
1740    foreach side { front back left right top bottom } {
1741        button $f.$side  -image [Rappture::icon view$side] \
1742            -command [itcl::code $this SetOrientation $side]
1743        Rappture::Tooltip::for $f.$side "Change the view to $side"
1744        pack $f.$side -side left
1745    }
1746
1747    blt::table $inner \
1748        0,0 $inner.view_l -anchor e -pady 2 \
1749        0,1 $inner.view -anchor w -pady 2
1750    blt::table configure $inner r0 -resize none
1751
1752    set labels { qx qy qz qw xpan ypan zoom }
1753    set row 1
1754    foreach tag $labels {
1755        label $inner.${tag}label -text $tag -font "Arial 9"
1756        entry $inner.${tag} -font "Arial 9"  -bg white \
1757            -textvariable [itcl::scope _view(-$tag)]
1758        bind $inner.${tag} <Return> \
1759            [itcl::code $this camera set -${tag}]
1760        bind $inner.${tag} <KP_Enter> \
1761            [itcl::code $this camera set -${tag}]
1762        blt::table $inner \
1763            $row,0 $inner.${tag}label -anchor e -pady 2 \
1764            $row,1 $inner.${tag} -anchor w -pady 2
1765        blt::table configure $inner r$row -resize none
1766        incr row
1767    }
1768    checkbutton $inner.ortho \
1769        -text "Orthographic Projection" \
1770        -variable [itcl::scope _view(-ortho)] \
1771        -command [itcl::code $this camera set -ortho] \
1772        -font "Arial 9"
1773    blt::table $inner \
1774            $row,0 $inner.ortho -cspan 2 -anchor w -pady 2
1775    blt::table configure $inner r$row -resize none
1776    incr row
1777
1778    blt::table configure $inner c* -resize none
1779    blt::table configure $inner c2 -resize expand
1780    blt::table configure $inner r$row -resize expand
1781}
1782
1783#
1784#  camera --
1785#
1786itcl::body Rappture::VtkSurfaceViewer::camera {option args} {
1787    switch -- $option {
1788        "show" {
1789            puts [array get _view]
1790        }
1791        "set" {
1792            set what [lindex $args 0]
1793            set x $_view($what)
1794            set code [catch { string is double $x } result]
1795            if { $code != 0 || !$result } {
1796                return
1797            }
1798            switch -- $what {
1799                "-ortho" {
1800                    if {$_view($what)} {
1801                        SendCmd "camera mode ortho"
1802                    } else {
1803                        SendCmd "camera mode persp"
1804                    }
1805                }
1806                "-xpan" - "-ypan" {
1807                    PanCamera
1808                }
1809                "-qx" - "-qy" - "-qz" - "-qw" {
1810                    set q [ViewToQuaternion]
1811                    $_arcball quaternion $q
1812                    EventuallyRotate $q
1813                }
1814                "-zoom" {
1815                    SendCmd "camera zoom $_view($what)"
1816                }
1817             }
1818        }
1819    }
1820}
1821
1822itcl::body Rappture::VtkSurfaceViewer::GetVtkData { args } {
1823    set bytes ""
1824    foreach dataobj [get] {
1825        foreach cname [$dataobj components] {
1826            set tag $dataobj-$cname
1827            set contents [$dataobj vtkdata $cname]
1828            append bytes "$contents\n"
1829        }
1830    }
1831    return [list .vtk $bytes]
1832}
1833
1834itcl::body Rappture::VtkSurfaceViewer::GetImage { args } {
1835    if { [image width $_image(download)] > 0 &&
1836         [image height $_image(download)] > 0 } {
1837        set bytes [$_image(download) data -format "jpeg -quality 100"]
1838        set bytes [Rappture::encoding::decode -as b64 $bytes]
1839        return [list .jpg $bytes]
1840    }
1841    return ""
1842}
1843
1844itcl::body Rappture::VtkSurfaceViewer::BuildDownloadPopup { popup command } {
1845    Rappture::Balloon $popup \
1846        -title "[Rappture::filexfer::label downloadWord] as..."
1847    set inner [$popup component inner]
1848    label $inner.summary -text "" -anchor w
1849    radiobutton $inner.vtk_button -text "VTK data file" \
1850        -variable [itcl::scope _downloadPopup(format)] \
1851        -font "Arial 9 " \
1852        -value vtk
1853    Rappture::Tooltip::for $inner.vtk_button "Save as VTK data file."
1854    radiobutton $inner.image_button -text "Image File" \
1855        -variable [itcl::scope _downloadPopup(format)] \
1856        -font "Arial 9 " \
1857        -value image
1858    Rappture::Tooltip::for $inner.image_button \
1859        "Save as digital image."
1860
1861    button $inner.ok -text "Save" \
1862        -highlightthickness 0 -pady 2 -padx 3 \
1863        -command $command \
1864        -compound left \
1865        -image [Rappture::icon download]
1866
1867    button $inner.cancel -text "Cancel" \
1868        -highlightthickness 0 -pady 2 -padx 3 \
1869        -command [list $popup deactivate] \
1870        -compound left \
1871        -image [Rappture::icon cancel]
1872
1873    blt::table $inner \
1874        0,0 $inner.summary -cspan 2  \
1875        1,0 $inner.vtk_button -anchor w -cspan 2 -padx { 4 0 } \
1876        2,0 $inner.image_button -anchor w -cspan 2 -padx { 4 0 } \
1877        4,1 $inner.cancel -width .9i -fill y \
1878        4,0 $inner.ok -padx 2 -width .9i -fill y
1879    blt::table configure $inner r3 -height 4
1880    blt::table configure $inner r4 -pady 4
1881    raise $inner.image_button
1882    $inner.vtk_button invoke
1883    return $inner
1884}
1885
1886itcl::body Rappture::VtkSurfaceViewer::SetObjectStyle { dataobj comp } {
1887    # Parse style string.
1888    set tag $dataobj-$comp
1889    array set style {
1890        -color BCGYR
1891        -edgecolor black
1892        -edges 0
1893        -isolinecolor white
1894        -isolinesvisible 0
1895        -levels 10
1896        -lighting 1
1897        -linewidth 1.0
1898        -opacity 1.0
1899        -outline 0
1900        -surfacevisible 1
1901        -wireframe 0
1902    }
1903    array set style [$dataobj style $comp]
1904    if { $dataobj != $_first || $style(-levels) == 1 } {
1905        set style(-opacity) 1.0
1906    }
1907
1908    # This is too complicated.  We want to set the colormap, number of
1909    # isolines and opacity for the dataset.  They can be the default values,
1910    # the style hints loaded with the dataset, or set by user controls.  As
1911    # datasets get loaded, they first use the defaults that are overidden
1912    # by the style hints.  If the user changes the global controls, then that
1913    # overrides everything else.  I don't know what it means when global
1914    # controls are specified as style hints by each dataset.  It complicates
1915    # the code to handle aberrant cases.
1916
1917    if { $_changed(-surfaceopacity) } {
1918        set style(-opacity) [expr $_settings(-surfaceopacity) * 0.01]
1919    }
1920    if { $_changed(-numcontours) } {
1921        set style(-levels) $_settings(-numcontours)
1922    }
1923    if { $_changed(-colormap) } {
1924        set style(-color) $_settings(-colormap)
1925    }
1926    if { $_currentColormap == "" } {
1927        SetCurrentColormap $style(-color)
1928        $itk_component(colormap) value $style(-color)
1929    }
1930    if { $_currentNumContours != $style(-levels) } {
1931        set _currentNumContours $style(-levels)
1932        set _settings(-numcontours) $_currentNumContours
1933        $itk_component(numcontours) value $_currentNumContours
1934        UpdateContourList
1935        DrawLegend
1936    }
1937    set _settings(-isolinesvisible) $style(-isolinesvisible)
1938    set _settings(-surfacevisible) $style(-surfacevisible)
1939
1940    SendCmd "outline add $tag"
1941    SendCmd "outline color [Color2RGB $itk_option(-plotforeground)] $tag"
1942    SendCmd "outline visible $style(-outline) $tag"
1943    set _settings(-outline) $style(-outline)
1944
1945    SendCmd "polydata add $tag"
1946    SendCmd "polydata edges $style(-edges) $tag"
1947    set _settings(-surfaceedges) $style(-edges)
1948    #SendCmd "polydata color [Color2RGB $settings(-color)] $tag"
1949    SendCmd "polydata lighting $style(-lighting) $tag"
1950    set _settings(-surfacelighting) $style(-lighting)
1951    SendCmd "polydata linecolor [Color2RGB $style(-edgecolor)] $tag"
1952    SendCmd "polydata linewidth $style(-linewidth) $tag"
1953    SendCmd "polydata opacity $style(-opacity) $tag"
1954    set _settings(-surfaceopacity) [expr $style(-opacity) * 100.0]
1955    SetCurrentColormap $style(-color)
1956    SendCmd "polydata wireframe $style(-wireframe) $tag"
1957    set _settings(-surfacewireframe) $style(-wireframe)
1958
1959    SendCmd [list contour2d add contourlist $_contourList $tag]
1960    SendCmd "contour2d colormode constant {} $tag"
1961    SendCmd "contour2d color [Color2RGB $style(-isolinecolor)] $tag"
1962}
1963
1964itcl::body Rappture::VtkSurfaceViewer::IsValidObject { dataobj } {
1965    if {[catch {$dataobj isa Rappture::Field} valid] != 0 || !$valid} {
1966        return 0
1967    }
1968    return 1
1969}
1970
1971#
1972# EnterLegend --
1973#
1974itcl::body Rappture::VtkSurfaceViewer::EnterLegend { x y } {
1975    SetLegendTip $x $y
1976}
1977
1978#
1979# MotionLegend --
1980#
1981itcl::body Rappture::VtkSurfaceViewer::MotionLegend { x y } {
1982    Rappture::Tooltip::tooltip cancel
1983    set c $itk_component(view)
1984    set cw [winfo width $c]
1985    set ch [winfo height $c]
1986    if { $x >= 0 && $x < $cw && $y >= 0 && $y < $ch } {
1987        SetLegendTip $x $y
1988    }
1989}
1990
1991#
1992# LeaveLegend --
1993#
1994itcl::body Rappture::VtkSurfaceViewer::LeaveLegend { } {
1995    Rappture::Tooltip::tooltip cancel
1996    .rappturetooltip configure -icon ""
1997}
1998
1999#
2000# SetLegendTip --
2001#
2002itcl::body Rappture::VtkSurfaceViewer::SetLegendTip { x y } {
2003    set fname $_curFldName
2004    set c $itk_component(view)
2005    set w [winfo width $c]
2006    set h [winfo height $c]
2007
2008    set font "Arial 8"
2009    set lineht [font metrics $font -linespace]
2010
2011    set ih [image height $_image(legend)]
2012    set iy [expr $y - ($lineht + 2)]
2013
2014    if { [string match "component*" $fname] } {
2015        set title ""
2016    } else {
2017        if { [info exists _fields($fname)] } {
2018            foreach { title units } $_fields($fname) break
2019            if { $units != "" } {
2020                set title [format "%s (%s)" $title $units]
2021            }
2022        } else {
2023            set title $fname
2024        }
2025    }
2026    # If there's a legend title, increase the offset by the line height.
2027    if { $title != "" } {
2028        incr iy -$lineht
2029    }
2030    # Make a swatch of the selected color
2031    if { [catch { $_image(legend) get 10 $iy } pixel] != 0 } {
2032        return
2033    }
2034    if { ![info exists _image(swatch)] } {
2035        set _image(swatch) [image create photo -width 24 -height 24]
2036    }
2037    set color [eval format "\#%02x%02x%02x" $pixel]
2038    $_image(swatch) put black  -to 0 0 23 23
2039    $_image(swatch) put $color -to 1 1 22 22
2040    .rappturetooltip configure -icon $_image(swatch)
2041
2042    # Compute the value of the point
2043    if { [info exists _limits($_curFldName)] } {
2044        foreach { vmin vmax } $_limits($_curFldName) break
2045        set t [expr 1.0 - (double($iy) / double($ih-1))]
2046        set value [expr $t * ($vmax - $vmin) + $vmin]
2047    } else {
2048        set value 0.0
2049    }
2050    set tx [expr $x + 15]
2051    set ty [expr $y - 5]
2052    if { [info exists _isolines($y)] } {
2053        Rappture::Tooltip::text $c [format "$title %g (isoline)" $_isolines($y)]
2054    } else {
2055        Rappture::Tooltip::text $c [format "$title %g" $value]
2056    }
2057    Rappture::Tooltip::tooltip show $c +$tx,+$ty
2058}
2059
2060#
2061# ReceiveLegend --
2062#
2063#        Invoked automatically whenever the "legend" command comes in from
2064#        the rendering server.  Indicates that binary image data with the
2065#        specified <size> will follow.
2066#
2067itcl::body Rappture::VtkSurfaceViewer::ReceiveLegend { colormap title min max size } {
2068    #puts stderr "ReceiveLegend colormap=$colormap title=$title range=$min,$max size=$size"
2069    set _title $title
2070    regsub {\(mag\)} $title "" _title
2071    if { [IsConnected] } {
2072        set bytes [ReceiveBytes $size]
2073        if { ![info exists _image(legend)] } {
2074            set _image(legend) [image create photo]
2075        }
2076        $_image(legend) configure -data $bytes
2077        #puts stderr "read $size bytes for [image width $_image(legend)]x[image height $_image(legend)] legend>"
2078        if { [catch {DrawLegend} errs] != 0 } {
2079            global errorInfo
2080            puts stderr "errs=$errs errorInfo=$errorInfo"
2081        }
2082    }
2083}
2084
2085#
2086# DrawLegend --
2087#
2088#       Draws the legend in the own canvas on the right side of the plot area.
2089#
2090itcl::body Rappture::VtkSurfaceViewer::DrawLegend {} {
2091    set fname $_curFldName
2092    set c $itk_component(view)
2093    set w [winfo width $c]
2094    set h [winfo height $c]
2095    set font "Arial 8"
2096    set lineht [font metrics $font -linespace]
2097
2098    if { [string match "component*" $fname] } {
2099        set title ""
2100    } else {
2101        if { [info exists _fields($fname)] } {
2102            foreach { title units } $_fields($fname) break
2103            if { $units != "" } {
2104                set title [format "%s (%s)" $title $units]
2105            }
2106        } else {
2107            set title $fname
2108        }
2109    }
2110    set x [expr $w - 2]
2111    if { !$_settings(-legendvisible) } {
2112        $c delete legend
2113        return
2114    }
2115    if { [$c find withtag "legend"] == "" } {
2116        set y 2
2117        # If there's a legend title, create a text item for the title.
2118        $c create text $x $y \
2119            -anchor ne \
2120            -fill $itk_option(-plotforeground) -tags "title legend" \
2121            -font $font
2122        if { $title != "" } {
2123            incr y $lineht
2124        }
2125        $c create text $x $y \
2126            -anchor ne \
2127            -fill $itk_option(-plotforeground) -tags "vmax legend" \
2128            -font $font
2129        incr y $lineht
2130        $c create image $x $y \
2131            -anchor ne \
2132            -image $_image(legend) -tags "colormap legend"
2133        $c create rectangle $x $y 1 1 \
2134            -fill "" -outline "" -tags "sensor legend"
2135        $c create text $x [expr {$h-2}] \
2136            -anchor se \
2137            -fill $itk_option(-plotforeground) -tags "vmin legend" \
2138            -font $font
2139        $c bind sensor <Enter> [itcl::code $this EnterLegend %x %y]
2140        $c bind sensor <Leave> [itcl::code $this LeaveLegend]
2141        $c bind sensor <Motion> [itcl::code $this MotionLegend %x %y]
2142    }
2143    $c delete isoline
2144    set x2 $x
2145    set iw [image width $_image(legend)]
2146    set ih [image height $_image(legend)]
2147    set x1 [expr $x2 - ($iw*12)/10]
2148    set color $_settings(-isolinecolor)
2149    # Draw the isolines on the legend.
2150    array unset _isolines
2151    if { $color != "none"  && [info exists _limits($_curFldName)] &&
2152         $_settings(-isolinesvisible) && $_settings(-numcontours) > 0 } {
2153
2154        foreach { vmin vmax } $_limits($_curFldName) break
2155        set range [expr double($vmax - $vmin)]
2156        if { $range <= 0.0 } {
2157            set range 1.0;              # Min is greater or equal to max.
2158        }
2159        set tags "isoline legend"
2160        set offset [expr 2 + $lineht]
2161        if { $title != "" } {
2162            incr offset $lineht
2163        }
2164        foreach value $_contourList {
2165            set norm [expr 1.0 - (($value - $vmin) / $range)]
2166            set y1 [expr int(round(($norm * $ih) + $offset))]
2167            for { set off 0 } { $off < 3 } { incr off } {
2168                set _isolines([expr $y1 + $off]) $value
2169                set _isolines([expr $y1 - $off]) $value
2170            }
2171            $c create line $x1 $y1 $x2 $y1 -fill $color -tags $tags
2172        }
2173    }
2174
2175    $c bind title <ButtonPress> [itcl::code $this Combo post]
2176    $c bind title <Enter> [itcl::code $this Combo activate]
2177    $c bind title <Leave> [itcl::code $this Combo deactivate]
2178    # Reset the item coordinates according the current size of the plot.
2179    $c itemconfigure title -text $title
2180    if { [info exists _limits($_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        $c raise title
2192    }
2193    $c coords vmax $x $y
2194    incr y $lineht
2195    $c coords colormap $x $y
2196    $c coords sensor [expr $x - $iw] $y $x [expr $y + $ih]
2197    $c raise sensor
2198    $c coords vmin $x [expr {$h - 2}]
2199}
2200
2201# ----------------------------------------------------------------------
2202# USAGE: _dropdown post
2203# USAGE: _dropdown unpost
2204# USAGE: _dropdown select
2205#
2206# Used internally to handle the dropdown list for this combobox.  The
2207# post/unpost options are invoked when the list is posted or unposted
2208# to manage the relief of the controlling button.  The select option
2209# is invoked whenever there is a selection from the list, to assign
2210# the value back to the gauge.
2211# ----------------------------------------------------------------------
2212itcl::body Rappture::VtkSurfaceViewer::Combo {option} {
2213    set c $itk_component(view)
2214    switch -- $option {
2215        post {
2216            foreach { x1 y1 x2 y2 } [$c bbox title] break
2217            set cw [winfo width $itk_component(view)]
2218            set mw [winfo reqwidth $itk_component(fieldmenu)]
2219            set x1 [expr $cw - $mw]
2220            set x [expr $x1 + [winfo rootx $itk_component(view)]]
2221            set y [expr $y2 + [winfo rooty $itk_component(view)]]
2222            tk_popup $itk_component(fieldmenu) $x $y
2223        }
2224        activate {
2225            $c itemconfigure title -fill red
2226        }
2227        deactivate {
2228            $c itemconfigure title -fill $itk_option(-plotforeground)
2229        }
2230        invoke {
2231            $itk_component(field) value $_curFldLabel
2232            AdjustSetting -field
2233        }
2234        default {
2235            error "bad option \"$option\": should be post, unpost, select"
2236        }
2237    }
2238}
2239
2240#
2241# SetCurrentColormap --
2242#
2243itcl::body Rappture::VtkSurfaceViewer::SetCurrentColormap { name } {
2244    # Keep track of the colormaps that we build.
2245    if { ![info exists _colormaps($name)] } {
2246        BuildColormap $name
2247        set _colormaps($name) 1
2248    }
2249    set _currentColormap $name
2250    SendCmd "contour2d colormap $_currentColormap"
2251    SendCmd "polydata colormap $_currentColormap"
2252}
2253
2254#
2255# BuildColormap --
2256#
2257#       Build the designated colormap on the server.
2258#
2259itcl::body Rappture::VtkSurfaceViewer::BuildColormap { name } {
2260    set cmap [ColorsToColormap $name]
2261    if { [llength $cmap] == 0 } {
2262        set cmap "0.0 0.0 0.0 0.0 1.0 1.0 1.0 1.0"
2263    }
2264    set wmap "0.0 1.0 1.0 1.0"
2265    SendCmd "colormap add $name { $cmap } { $wmap }"
2266}
2267
2268itcl::body Rappture::VtkSurfaceViewer::SetOrientation { side } {
2269    array set positions {
2270        front "1 0 0 0"
2271        back  "0 0 1 0"
2272        left  "0.707107 0 -0.707107 0"
2273        right "0.707107 0 0.707107 0"
2274        top   "0.707107 -0.707107 0 0"
2275        bottom "0.707107 0.707107 0 0"
2276    }
2277    foreach name { -qw -qx -qy -qz } value $positions($side) {
2278        set _view($name) $value
2279    }
2280    set q [ViewToQuaternion]
2281    $_arcball quaternion $q
2282    SendCmd "camera orient $q"
2283    SendCmd "camera reset"
2284    set _view(-xpan) 0
2285    set _view(-ypan) 0
2286    set _view(-zoom) 1.0
2287}
2288
2289itcl::body Rappture::VtkSurfaceViewer::UpdateContourList {} {
2290    if { ![info exists _limits($_curFldName)] } {
2291        return
2292    }
2293    if { $_currentNumContours < 1 } {
2294        set _contourList ""
2295        return
2296    }
2297    foreach { vmin vmax } $_limits($_curFldName) break
2298    set v [blt::vector create \#auto]
2299    $v seq $vmin $vmax [expr $_currentNumContours+2]
2300    $v delete end 0
2301    set _contourList [$v range 0 end]
2302    blt::vector destroy $v
2303}
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