| 1 | # ---------------------------------------------------------------------- |
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| 2 | # COMPONENT: loader - widget for loading examples and old runs |
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| 3 | # |
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| 4 | # This widget is a glorified combobox that is used to load various |
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| 5 | # example files into the application. |
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| 6 | # ====================================================================== |
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| 7 | # AUTHOR: Michael McLennan, Purdue University |
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| 8 | # Copyright (c) 2004-2005 Purdue Research Foundation |
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| 9 | # |
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| 10 | # See the file "license.terms" for information on usage and |
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| 11 | # redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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| 12 | # ====================================================================== |
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| 13 | package require Itk |
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| 14 | |
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| 15 | option add *Loader.textForeground black widgetDefault |
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| 16 | option add *Loader.textBackground white widgetDefault |
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| 17 | |
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| 18 | itcl::class Rappture::Loader { |
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| 19 | inherit itk::Widget |
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| 20 | |
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| 21 | itk_option define -tool tool Tool "" |
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| 22 | itk_option define -state state State "normal" |
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| 23 | |
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| 24 | constructor {owner path args} { # defined below } |
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| 25 | destructor { # defined below } |
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| 26 | |
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| 27 | public method value {args} |
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| 28 | |
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| 29 | public method label {} |
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| 30 | public method tooltip {} |
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| 31 | |
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| 32 | protected method _newValue {} |
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| 33 | protected method _uploadValue {path args} |
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| 34 | protected method _downloadValues {} |
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| 35 | protected method _tooltip {} |
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| 36 | |
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| 37 | private variable _owner "" ;# thing managing this control |
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| 38 | private variable _path "" ;# path in XML to this loader |
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| 39 | private variable _lastlabel "";# label of last example loaded |
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| 40 | |
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| 41 | private variable _uppath "" ;# list: path label desc ... |
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| 42 | private variable _dnpaths "" ;# list of download element paths |
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| 43 | private common _dnpath2state ;# maps download path => yes/no state |
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| 44 | private variable _copyfrom "" ;# copy xml objects from here in example lib |
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| 45 | private variable _copyto "" ;# copy xml objects here in example lib |
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| 46 | private variable _label2file ;# maps combobox labels to filenames |
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| 47 | } |
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| 48 | |
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| 49 | itk::usual Loader { |
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| 50 | keep -cursor -font |
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| 51 | keep -foreground -background |
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| 52 | keep -textforeground -textbackground |
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| 53 | keep -selectbackground -selectforeground -selectborderwidth |
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| 54 | } |
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| 55 | |
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| 56 | # ---------------------------------------------------------------------- |
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| 57 | # CONSTRUCTOR |
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| 58 | # ---------------------------------------------------------------------- |
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| 59 | itcl::body Rappture::Loader::constructor {owner path args} { |
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| 60 | if {[catch {$owner isa Rappture::ControlOwner} valid] != 0 || !$valid} { |
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| 61 | error "bad object \"$owner\": should be Rappture::ControlOwner" |
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| 62 | } |
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| 63 | set _owner $owner |
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| 64 | set _path $path |
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| 65 | |
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| 66 | itk_component add combo { |
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| 67 | Rappture::Combobox $itk_interior.combo -editable no |
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| 68 | } { |
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| 69 | usual |
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| 70 | keep -width |
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| 71 | } |
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| 72 | pack $itk_component(combo) -expand yes -fill both |
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| 73 | bind $itk_component(combo) <<Value>> [itcl::code $this _newValue] |
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| 74 | |
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| 75 | eval itk_initialize $args |
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| 76 | |
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| 77 | # example files are stored here |
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| 78 | if {$itk_option(-tool) != ""} { |
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| 79 | set fdir [$itk_option(-tool) installdir] |
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| 80 | } else { |
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| 81 | set fdir "." |
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| 82 | } |
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| 83 | set defval [$_owner xml get $path.default] |
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| 84 | |
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| 85 | # |
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| 86 | # If this loader has a <new> section, then create that |
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| 87 | # entry first. |
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| 88 | # |
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| 89 | set newfile "" |
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| 90 | foreach comp [$_owner xml children -type new $path] { |
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| 91 | set name [$_owner xml get $path.$comp] |
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| 92 | set fname [file join $fdir examples $name] |
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| 93 | |
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| 94 | if {[file exists $fname]} { |
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| 95 | set newfile $fname |
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| 96 | |
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| 97 | if {[catch {set obj [Rappture::library $fname]} result]} { |
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| 98 | puts stderr "WARNING: can't load example file \"$fname\"" |
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| 99 | puts stderr " $result" |
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| 100 | } else { |
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| 101 | set label "New" |
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| 102 | $itk_component(combo) choices insert end $obj $label |
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| 103 | |
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| 104 | # if this is new, add it to the label->file hash |
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| 105 | if {![info exists entries($label)]} { |
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| 106 | set entries($label) $obj |
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| 107 | set _label2file($label) [file tail $fname] |
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| 108 | } |
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| 109 | |
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| 110 | # translate default file name => default label |
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| 111 | if {[string equal $defval [file tail $fname]]} { |
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| 112 | $_owner xml put $path.default "New" |
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| 113 | } |
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| 114 | } |
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| 115 | break |
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| 116 | } else { |
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| 117 | puts stderr "WARNING: missing example file \"$fname\"" |
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| 118 | } |
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| 119 | } |
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| 120 | |
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| 121 | # |
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| 122 | # If this loader has an <upload> section, then create that |
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| 123 | # entry next. |
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| 124 | # |
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| 125 | foreach comp [$_owner xml children -type upload $path] { |
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| 126 | foreach tcomp [$_owner xml children -type to $path.$comp] { |
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| 127 | set topath [$_owner xml get $path.$comp.$tcomp] |
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| 128 | set label [$_owner xml get $topath.about.label] |
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| 129 | set desc [$_owner xml get $topath.about.description] |
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| 130 | lappend _uppath $topath $label $desc |
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| 131 | } |
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| 132 | break |
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| 133 | } |
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| 134 | if {[llength $_uppath] > 0} { |
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| 135 | $itk_component(combo) choices insert end \ |
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| 136 | @upload [Rappture::filexfer::label upload] |
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| 137 | } |
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| 138 | |
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| 139 | # |
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| 140 | # If this loader has a <download> section, then create that |
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| 141 | # entry next. Build a popup for choices if there is more than |
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| 142 | # one download element. |
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| 143 | # |
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| 144 | Rappture::Balloon $itk_component(hull).download \ |
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| 145 | -title "Choose what to [string tolower [Rappture::filexfer::label downloadWord]]:" |
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| 146 | set inner [$itk_component(hull).download component inner] |
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| 147 | |
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| 148 | set i 0 |
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| 149 | foreach comp [$_owner xml children -type download $path] { |
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| 150 | foreach dcomp [$_owner xml children -type from $path.$comp] { |
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| 151 | set frompath [$_owner xml get $path.$comp.$dcomp] |
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| 152 | if {"" != $frompath} { |
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| 153 | lappend _dnpaths $frompath |
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| 154 | set _dnpath2state($this-$frompath) [expr {$i == 0}] |
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| 155 | |
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| 156 | set label [$_owner xml get $frompath.about.label] |
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| 157 | checkbutton $inner.cb$i -text $label \ |
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| 158 | -variable ::Rappture::Loader::_dnpath2state($this-$frompath) |
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| 159 | pack $inner.cb$i -anchor w |
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| 160 | incr i |
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| 161 | } |
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| 162 | } |
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| 163 | } |
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| 164 | button $inner.go -text [Rappture::filexfer::label download] \ |
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| 165 | -command [itcl::code $this _downloadValues] |
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| 166 | pack $inner.go -side bottom -padx 50 -pady {4 2} |
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| 167 | |
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| 168 | if {[llength $_dnpaths] > 0} { |
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| 169 | $itk_component(combo) choices insert end \ |
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| 170 | @download [Rappture::filexfer::label download] |
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| 171 | } |
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| 172 | |
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| 173 | if {[$itk_component(combo) choices size] > 0} { |
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| 174 | $itk_component(combo) choices insert end "---" "---" |
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| 175 | } |
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| 176 | |
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| 177 | # |
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| 178 | # Scan through and extract example objects, and load them into |
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| 179 | # the combobox. |
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| 180 | # |
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| 181 | set flist "" |
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| 182 | foreach comp [$_owner xml children -type example $path] { |
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| 183 | lappend flist [$_owner xml get $path.$comp] |
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| 184 | } |
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| 185 | |
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| 186 | # if there are no examples, then look for *.xml |
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| 187 | if {[llength $flist] == 0} { |
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| 188 | set flist *.xml |
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| 189 | } |
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| 190 | |
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| 191 | catch {unset entries} |
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| 192 | set _counter 0 |
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| 193 | foreach ftail $flist { |
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| 194 | set fpath [file join $fdir examples $ftail] |
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| 195 | |
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| 196 | foreach fname [glob -nocomplain $fpath] { |
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| 197 | if {[string equal $fname $newfile]} { |
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| 198 | continue |
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| 199 | } |
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| 200 | if {[file exists $fname]} { |
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| 201 | if {[catch {set obj [Rappture::library $fname]} result]} { |
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| 202 | puts stderr "WARNING: can't load example file \"$fname\"" |
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| 203 | puts stderr " $result" |
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| 204 | } else { |
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| 205 | set label [$obj get about.label] |
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| 206 | if {$label == ""} { |
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| 207 | set label "Example #[incr _counter]" |
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| 208 | } |
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| 209 | |
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| 210 | # if this is new, add it to the label->file hash |
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| 211 | if {![info exists entries($label)]} { |
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| 212 | set entries($label) $obj |
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| 213 | set _label2file($label) [file tail $fname] |
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| 214 | } |
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| 215 | |
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| 216 | # translate default file name => default label |
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| 217 | if {[string equal $defval [file tail $fname]]} { |
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| 218 | $_owner xml put $path.default $label |
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| 219 | } |
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| 220 | } |
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| 221 | } else { |
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| 222 | puts stderr "WARNING: missing example file \"$fname\"" |
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| 223 | } |
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| 224 | } |
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| 225 | } |
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| 226 | foreach label [lsort -dictionary [array names entries]] { |
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| 227 | $itk_component(combo) choices insert end $entries($label) $label |
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| 228 | } |
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| 229 | |
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| 230 | set _copyfrom [$_owner xml get $path.copy.from] |
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| 231 | set _copyto [$_owner xml get $path.copy.to] |
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| 232 | |
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| 233 | # |
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| 234 | # Assign the default value to this widget, if there is one. |
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| 235 | # |
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| 236 | set str [$_owner xml get $path.default] |
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| 237 | if {$str != ""} { after 2500 [itcl::code $this value $str] } |
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| 238 | } |
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| 239 | |
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| 240 | # ---------------------------------------------------------------------- |
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| 241 | # DESTRUCTOR |
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| 242 | # ---------------------------------------------------------------------- |
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| 243 | itcl::body Rappture::Loader::destructor {} { |
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| 244 | # be sure to clean up entries for this widget's download paths |
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| 245 | foreach path $_dnpaths { |
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| 246 | catch {unset _dnpath2state($this-$path)} |
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| 247 | } |
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| 248 | } |
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| 249 | |
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| 250 | # ---------------------------------------------------------------------- |
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| 251 | # USAGE: value ?-check? ?<newval>? |
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| 252 | # |
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| 253 | # Clients use this to query/set the value for this widget. With |
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| 254 | # no args, it returns the current value for the widget. If the |
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| 255 | # <newval> is specified, it sets the value of the widget and |
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| 256 | # sends a <<Value>> event. If the -check flag is included, the |
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| 257 | # new value is not actually applied, but just checked for correctness. |
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| 258 | # ---------------------------------------------------------------------- |
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| 259 | itcl::body Rappture::Loader::value {args} { |
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| 260 | set onlycheck 0 |
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| 261 | set i [lsearch -exact $args -check] |
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| 262 | if {$i >= 0} { |
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| 263 | set onlycheck 1 |
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| 264 | set args [lreplace $args $i $i] |
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| 265 | } |
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| 266 | |
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| 267 | if {[llength $args] == 1} { |
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| 268 | if {$onlycheck} { |
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| 269 | # someday we may add validation... |
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| 270 | return |
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| 271 | } |
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| 272 | set newval [lindex $args 0] |
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| 273 | $itk_component(combo) value $newval |
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| 274 | return $newval |
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| 275 | |
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| 276 | } elseif {[llength $args] != 0} { |
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| 277 | error "wrong # args: should be \"value ?-check? ?newval?\"" |
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| 278 | } |
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| 279 | |
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| 280 | # |
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| 281 | # Query the value and return. |
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| 282 | # |
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| 283 | return [$itk_component(combo) value] |
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| 284 | } |
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| 285 | |
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| 286 | # ---------------------------------------------------------------------- |
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| 287 | # USAGE: label |
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| 288 | # |
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| 289 | # Clients use this to query the label associated with this widget. |
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| 290 | # Reaches into the XML and pulls out the appropriate label string. |
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| 291 | # ---------------------------------------------------------------------- |
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| 292 | itcl::body Rappture::Loader::label {} { |
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| 293 | set label [$_owner xml get $_path.about.label] |
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| 294 | if {"" == $label} { |
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| 295 | set label "Example" |
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| 296 | } |
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| 297 | return $label |
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| 298 | } |
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| 299 | |
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| 300 | # ---------------------------------------------------------------------- |
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| 301 | # USAGE: tooltip |
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| 302 | # |
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| 303 | # Clients use this to query the tooltip associated with this widget. |
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| 304 | # Reaches into the XML and pulls out the appropriate description |
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| 305 | # string. Returns the string that should be used with the |
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| 306 | # Rappture::Tooltip facility. |
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| 307 | # ---------------------------------------------------------------------- |
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| 308 | itcl::body Rappture::Loader::tooltip {} { |
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| 309 | # query tooltip on-demand based on current choice |
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| 310 | return "@[itcl::code $this _tooltip]" |
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| 311 | } |
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| 312 | |
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| 313 | # ---------------------------------------------------------------------- |
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| 314 | # USAGE: _newValue |
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| 315 | # |
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| 316 | # Invoked automatically whenever the value in the combobox changes. |
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| 317 | # Tries to load the selected example into the tool's data structure. |
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| 318 | # Sends a <<Value>> event to notify clients of the change. |
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| 319 | # ---------------------------------------------------------------------- |
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| 320 | itcl::body Rappture::Loader::_newValue {} { |
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| 321 | set newval [$itk_component(combo) value] |
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| 322 | set obj [$itk_component(combo) translate $newval] |
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| 323 | if {$obj == "@upload"} { |
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| 324 | set tool [Rappture::Tool::resources -appname] |
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| 325 | Rappture::filexfer::upload \ |
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| 326 | $tool $_uppath [itcl::code $this _uploadValue] |
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| 327 | |
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| 328 | # put the combobox back to its last value |
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| 329 | $itk_component(combo) component entry configure -state normal |
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| 330 | $itk_component(combo) component entry delete 0 end |
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| 331 | $itk_component(combo) component entry insert end $_lastlabel |
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| 332 | $itk_component(combo) component entry configure -state disabled |
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| 333 | |
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| 334 | } elseif {$obj == "@download"} { |
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| 335 | if {[llength $_dnpaths] == 1} { |
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| 336 | _downloadValues |
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| 337 | } else { |
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| 338 | $itk_component(hull).download activate $itk_component(combo) below |
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| 339 | } |
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| 340 | |
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| 341 | # put the combobox back to its last value |
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| 342 | $itk_component(combo) component entry configure -state normal |
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| 343 | $itk_component(combo) component entry delete 0 end |
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| 344 | $itk_component(combo) component entry insert end $_lastlabel |
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| 345 | $itk_component(combo) component entry configure -state disabled |
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| 346 | |
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| 347 | } elseif {$obj == "---"} { |
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| 348 | # put the combobox back to its last value |
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| 349 | $itk_component(combo) component entry configure -state normal |
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| 350 | $itk_component(combo) component entry delete 0 end |
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| 351 | $itk_component(combo) component entry insert end $_lastlabel |
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| 352 | $itk_component(combo) component entry configure -state disabled |
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| 353 | } elseif {$obj != "" && $itk_option(-tool) != ""} { |
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| 354 | if {("" != $_copyfrom) && ("" != $_copyto)} { |
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| 355 | $obj copy $_copyto from $_copyfrom |
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| 356 | } |
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| 357 | $_owner xml put $_path.file $_label2file($newval) |
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| 358 | $itk_option(-tool) load $obj |
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| 359 | set _lastlabel $newval |
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| 360 | } |
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| 361 | |
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| 362 | event generate $itk_component(hull) <<Value>> |
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| 363 | } |
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| 364 | |
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| 365 | # ---------------------------------------------------------------------- |
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| 366 | # USAGE: _tooltip |
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| 367 | # |
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| 368 | # Returns the tooltip for this widget, given the current choice in |
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| 369 | # the selector. This is normally called by the Rappture::Tooltip |
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| 370 | # facility whenever it is about to pop up a tooltip for this widget. |
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| 371 | # ---------------------------------------------------------------------- |
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| 372 | itcl::body Rappture::Loader::_tooltip {} { |
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| 373 | set str [string trim [$_owner xml get $_path.about.description]] |
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| 374 | |
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| 375 | # get the description for the current choice, if there is one |
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| 376 | set newval [$itk_component(combo) value] |
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| 377 | set obj [$itk_component(combo) translate $newval] |
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| 378 | if {$obj != ""} { |
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| 379 | if {$obj == "@upload"} { |
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| 380 | append str "\n\nUse this option to upload data from your desktop." |
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| 381 | } else { |
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| 382 | set label [$obj get about.label] |
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| 383 | if {[string length $label] > 0} { |
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| 384 | append str "\n\n$label" |
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| 385 | } |
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| 386 | |
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| 387 | set desc [$obj get about.description] |
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| 388 | if {[string length $desc] > 0} { |
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| 389 | if {[string length $label] > 0} { |
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| 390 | append str ":\n" |
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| 391 | } else { |
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| 392 | append str "\n\n" |
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| 393 | } |
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| 394 | append str $desc |
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| 395 | } |
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| 396 | } |
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| 397 | } |
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| 398 | return [string trim $str] |
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| 399 | } |
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| 400 | |
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| 401 | # ---------------------------------------------------------------------- |
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| 402 | # USAGE: _uploadValue ?<key> <value> <key> <value> ...? |
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| 403 | # |
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| 404 | # Invoked automatically whenever the user has uploaded data from |
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| 405 | # the "Upload..." option. Takes the data value (passed as an |
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| 406 | # argument) and loads into the destination widget. |
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| 407 | # ---------------------------------------------------------------------- |
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| 408 | itcl::body Rappture::Loader::_uploadValue {args} { |
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| 409 | array set data $args |
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| 410 | |
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| 411 | if {[info exists data(error)]} { |
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| 412 | Rappture::Tooltip::cue $itk_component(combo) $data(error) |
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| 413 | } |
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| 414 | |
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| 415 | if {[info exists data(path)] && [info exists data(data)]} { |
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| 416 | Rappture::Tooltip::cue hide ;# take down note about the popup window |
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| 417 | $itk_option(-tool) valuefor $data(path) $data(data) |
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| 418 | |
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| 419 | $itk_component(combo) component entry configure -state normal |
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| 420 | $itk_component(combo) component entry delete 0 end |
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| 421 | $itk_component(combo) component entry insert end "Uploaded data" |
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| 422 | $itk_component(combo) component entry configure -state disabled |
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| 423 | set _lastlabel "Uploaded data" |
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| 424 | } |
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| 425 | } |
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| 426 | |
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| 427 | # ---------------------------------------------------------------------- |
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| 428 | # USAGE: _downloadValues |
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| 429 | # |
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| 430 | # Used internally to download all values checked by the popup that |
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| 431 | # controls downloading. Sends the values for the various controls |
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| 432 | # out to the user by popping up separate browser windows. |
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| 433 | # ---------------------------------------------------------------------- |
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| 434 | itcl::body Rappture::Loader::_downloadValues {} { |
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| 435 | # take down the popup (in case it was posted) |
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| 436 | $itk_component(hull).download deactivate |
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| 437 | |
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| 438 | set mesg "" |
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| 439 | foreach path $_dnpaths { |
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| 440 | if {$_dnpath2state($this-$path)} { |
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| 441 | set info [$itk_option(-tool) valuefor $path] |
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| 442 | set mesg [Rappture::filexfer::download $info input.txt] |
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| 443 | if {"" != $mesg} { break } |
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| 444 | } |
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| 445 | } |
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| 446 | |
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| 447 | if {"" != $mesg} { |
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| 448 | Rappture::Tooltip::cue $itk_component(combo) $mesg |
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| 449 | } |
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| 450 | } |
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| 451 | |
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| 452 | # ---------------------------------------------------------------------- |
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| 453 | # OPTION: -tool |
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| 454 | # ---------------------------------------------------------------------- |
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| 455 | itcl::configbody Rappture::Loader::tool { |
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| 456 | if {[catch {$itk_option(-tool) isa Rappture::Tool} valid] || !$valid} { |
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| 457 | error "object \"$itk_option(-tool)\" is not a Rappture Tool" |
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| 458 | } |
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| 459 | } |
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| 460 | |
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| 461 | # ---------------------------------------------------------------------- |
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| 462 | # CONFIGURATION OPTION: -state |
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| 463 | # ---------------------------------------------------------------------- |
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| 464 | itcl::configbody Rappture::Loader::state { |
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| 465 | set valid {normal disabled} |
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| 466 | if {[lsearch -exact $valid $itk_option(-state)] < 0} { |
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| 467 | error "bad value \"$itk_option(-state)\": should be [join $valid {, }]" |
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| 468 | } |
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| 469 | $itk_component(combo) configure -state $itk_option(-state) |
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| 470 | } |
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