[3330] | 1 | # -*- mode: tcl; indent-tabs-mode: nil -*- |
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| 2 | # ---------------------------------------------------------------------- |
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| 3 | # COMPONENT: Sequencedial - selector, like the dial on a car radio |
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| 4 | # |
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| 5 | # This widget looks like the dial on an old-fashioned car radio. |
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| 6 | # It draws a series of values along an axis, and allows a selector |
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| 7 | # to move back and forth to select the values. |
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| 8 | # ====================================================================== |
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| 9 | # AUTHOR: Michael McLennan, Purdue University |
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| 10 | # Copyright (c) 2004-2012 HUBzero Foundation, LLC |
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| 11 | # |
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| 12 | # See the file "license.terms" for information on usage and |
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| 13 | # redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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| 14 | # ====================================================================== |
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| 15 | package require Itk |
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| 16 | |
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| 17 | option add *SequenceDial.thickness 10 widgetDefault |
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| 18 | option add *SequenceDial.length 2i widgetDefault |
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| 19 | option add *SequenceDial.knobImage knob widgetDefault |
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| 20 | option add *SequenceDial.knobPosition n@middle widgetDefault |
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| 21 | option add *SequenceDial.dialOutlineColor black widgetDefault |
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| 22 | option add *SequenceDial.dialFillColor white widgetDefault |
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| 23 | option add *SequenceDial.lineColor gray widgetDefault |
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| 24 | option add *SequenceDial.activeLineColor black widgetDefault |
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| 25 | option add *SequenceDial.padding 0 widgetDefault |
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| 26 | option add *SequenceDial.valueWidth 10 widgetDefault |
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| 27 | option add *SequenceDial.valuePadding 0.1 widgetDefault |
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| 28 | option add *SequenceDial.foreground black widgetDefault |
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| 29 | option add *SequenceDial.font \ |
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| 30 | -*-helvetica-medium-r-normal-*-12-* widgetDefault |
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| 31 | |
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| 32 | itcl::class Rappture::SequenceDial { |
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| 33 | inherit itk::Widget |
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| 34 | |
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| 35 | itk_option define -min min Min "" |
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| 36 | itk_option define -max max Max "" |
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| 37 | itk_option define -variable variable Variable "" |
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| 38 | |
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| 39 | itk_option define -thickness thickness Thickness 0 |
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| 40 | itk_option define -length length Length 0 |
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| 41 | itk_option define -padding padding Padding 0 |
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| 42 | |
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| 43 | itk_option define -foreground foreground Foreground "black" |
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| 44 | itk_option define -dialoutlinecolor dialOutlineColor Color "black" |
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| 45 | itk_option define -dialfillcolor dialFillColor Color "white" |
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| 46 | itk_option define -dialprogresscolor dialProgressColor Color "" |
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| 47 | itk_option define -linecolor lineColor Color "black" |
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| 48 | itk_option define -activelinecolor activeLineColor Color "black" |
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| 49 | itk_option define -knobimage knobImage KnobImage "" |
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| 50 | itk_option define -knobposition knobPosition KnobPosition "" |
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| 51 | |
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| 52 | itk_option define -font font Font "" |
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| 53 | itk_option define -valuewidth valueWidth ValueWidth 0 |
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| 54 | itk_option define -valuepadding valuePadding ValuePadding 0 |
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| 55 | |
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| 56 | itk_option define -interactcommand interactCommand InteractCommand "" |
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| 57 | |
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| 58 | |
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| 59 | constructor {args} { # defined below } |
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| 60 | destructor { # defined below } |
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| 61 | |
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| 62 | public method add {label {value ""}} |
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| 63 | public method clear {} |
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| 64 | public method get {args} |
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| 65 | public method current {args} |
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| 66 | public method color {value} |
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| 67 | |
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| 68 | protected method _setCurrent {val} |
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| 69 | protected method _redraw {} |
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| 70 | protected method _click {x y} |
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| 71 | protected method _navigate {offset} |
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| 72 | protected method _limits {} |
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| 73 | protected method _findLabel {str} |
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| 74 | protected method _fixSize {} |
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| 75 | protected method _fixValue {args} |
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| 76 | protected method _doInteract {} |
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| 77 | |
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| 78 | private method EventuallyRedraw {} |
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| 79 | private variable _redrawPending 0 |
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[3656] | 80 | private variable _afterId -1 |
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[3330] | 81 | private variable _values "" ;# list of all values on the dial |
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| 82 | private variable _val2label ;# maps value => string label(s) |
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| 83 | private variable _current "" ;# current value (where pointer is) |
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| 84 | private variable _variable "" ;# variable associated with -variable |
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| 85 | |
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| 86 | private variable _knob "" ;# image for knob |
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| 87 | private variable _spectrum "" ;# width allocated for values |
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| 88 | private variable _activecolor "" ;# width allocated for values |
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| 89 | private variable _vwidth 0 ;# width allocated for values |
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| 90 | } |
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| 91 | |
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| 92 | itk::usual SequenceDial { |
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| 93 | keep -background -foreground -cursor -font |
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| 94 | } |
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| 95 | |
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| 96 | # ---------------------------------------------------------------------- |
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| 97 | # CONSTRUCTOR |
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| 98 | # ---------------------------------------------------------------------- |
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| 99 | itcl::body Rappture::SequenceDial::constructor {args} { |
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| 100 | itk_component add dial { |
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| 101 | canvas $itk_interior.dial |
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| 102 | } |
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| 103 | pack $itk_component(dial) -expand yes -fill both |
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| 104 | bind $itk_component(dial) <Configure> [itcl::code $this EventuallyRedraw] |
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| 105 | |
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| 106 | # bind $itk_component(dial) <ButtonPress-1> [itcl::code $this _click %x %y] |
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| 107 | bind $itk_component(dial) <B1-Motion> [itcl::code $this _click %x %y] |
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| 108 | # bind $itk_component(dial) <ButtonRelease-1> [itcl::code $this _click %x %y] |
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| 109 | |
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| 110 | bind $itk_component(hull) <KeyPress-Left> [itcl::code $this _navigate -1] |
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| 111 | bind $itk_component(hull) <KeyPress-Right> [itcl::code $this _navigate 1] |
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| 112 | |
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| 113 | eval itk_initialize $args |
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| 114 | |
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| 115 | _fixSize |
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| 116 | } |
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| 117 | |
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| 118 | # ---------------------------------------------------------------------- |
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| 119 | # DESTRUCTOR |
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| 120 | # ---------------------------------------------------------------------- |
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| 121 | itcl::body Rappture::SequenceDial::destructor {} { |
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| 122 | configure -variable "" ;# remove variable trace |
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[3656] | 123 | after cancel $_afterId |
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[3330] | 124 | } |
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| 125 | |
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| 126 | # ---------------------------------------------------------------------- |
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| 127 | # USAGE: add <label> ?<value>? |
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| 128 | # |
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| 129 | # Clients use this to add new values to the dial. Values are always |
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| 130 | # sorted in order along the dial. If the value is not specified, |
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| 131 | # then it is created automatically based on the number of elements |
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| 132 | # on the dial. |
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| 133 | # ---------------------------------------------------------------------- |
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| 134 | itcl::body Rappture::SequenceDial::add {label {value ""}} { |
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| 135 | if {"" == $value} { |
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| 136 | set value [llength $_values] |
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| 137 | } |
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| 138 | |
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| 139 | # Add this value if we've never see it before |
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| 140 | if {[lsearch -real $_values $value] < 0} { |
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| 141 | lappend _values $value |
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| 142 | set _values [lsort -real $_values] |
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| 143 | } |
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| 144 | |
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| 145 | # Keep all equivalent strings for this value. |
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| 146 | # That way, we can later select either "1e18" or "1.0e+18" |
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| 147 | lappend _val2label($value) $label |
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| 148 | |
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| 149 | if {"" == $_current} { |
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| 150 | _setCurrent $value |
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| 151 | } |
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| 152 | EventuallyRedraw |
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| 153 | } |
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| 154 | |
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| 155 | itcl::body Rappture::SequenceDial::EventuallyRedraw {} { |
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| 156 | if { !$_redrawPending } { |
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[3656] | 157 | set _afterId [after 150 [itcl::code $this _redraw]] |
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[3330] | 158 | event generate $itk_component(hull) <<Value>> |
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| 159 | set _resizePending 1 |
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| 160 | } |
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| 161 | } |
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| 162 | |
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| 163 | # ---------------------------------------------------------------------- |
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| 164 | # USAGE: clear |
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| 165 | # |
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| 166 | # Clients use this to remove all existing values from the dial. |
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| 167 | # ---------------------------------------------------------------------- |
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| 168 | itcl::body Rappture::SequenceDial::clear {} { |
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| 169 | set _values "" |
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| 170 | _setCurrent "" |
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| 171 | catch {unset _val2label} |
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| 172 | |
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| 173 | EventuallyRedraw |
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| 174 | } |
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| 175 | |
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| 176 | # ---------------------------------------------------------------------- |
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| 177 | # USAGE: get ?-format what? ?current|@index? |
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| 178 | # |
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| 179 | # Clients use this to query values within this radiodial. With no |
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| 180 | # args, it returns a list of all values stored in the widget. The |
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| 181 | # "current" arg requests only the current value on the radiodial. |
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| 182 | # The @index syntax can be used to request a particular value at |
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| 183 | # an index within the list of values. |
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| 184 | # |
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| 185 | # By default, this method returns the label for each value. The |
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| 186 | # format option can be used to request the label, the value, or |
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| 187 | # both. |
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| 188 | # ---------------------------------------------------------------------- |
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| 189 | itcl::body Rappture::SequenceDial::get {args} { |
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| 190 | Rappture::getopts args params { |
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| 191 | value -format "label" |
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| 192 | } |
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| 193 | if {[llength $args] > 1} { |
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| 194 | error "wrong # args: should be \"get ?-format f? ?current|@index\"" |
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| 195 | } |
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| 196 | set index [lindex $args 0] |
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| 197 | if {"" == $index} { |
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| 198 | set ilist "" |
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| 199 | for {set i 0} {$i < [llength $_values]} {incr i} { |
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| 200 | lappend ilist $i |
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| 201 | } |
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| 202 | } elseif {"current" == $index} { |
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| 203 | set ilist [lsearch -exact $_values $_current] |
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| 204 | if {$ilist < 0} { |
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| 205 | set ilist "" |
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| 206 | } |
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| 207 | } elseif {[regexp {^@([0-9]+|end)$} $index match i]} { |
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| 208 | set ilist $i |
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| 209 | } |
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| 210 | if {[llength $ilist] == 1} { |
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| 211 | set op set |
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| 212 | } else { |
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| 213 | set op lappend |
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| 214 | } |
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| 215 | |
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| 216 | set rlist "" |
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| 217 | foreach i $ilist { |
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| 218 | switch -- $params(-format) { |
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| 219 | label { |
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| 220 | set v [lindex $_values $i] |
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| 221 | $op rlist [lindex $_val2label($v) 0] |
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| 222 | } |
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| 223 | value { |
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| 224 | $op rlist [lindex $_values $i] |
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| 225 | } |
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| 226 | position { |
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| 227 | foreach {min max} [_limits] break |
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| 228 | set v [lindex $_values $i] |
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| 229 | set frac [expr {double($v-$min)/($max-$min)}] |
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| 230 | $op rlist $frac |
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| 231 | } |
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| 232 | all { |
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| 233 | set v [lindex $_values $i] |
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| 234 | foreach {min max} [_limits] break |
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| 235 | set frac [expr {double($v-$min)/($max-$min)}] |
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| 236 | set l [lindex $_val2label($v) 0] |
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| 237 | $op rlist [list $l $v $frac] |
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| 238 | } |
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| 239 | default { |
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| 240 | error "bad value \"$v\": should be label, value, position, all" |
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| 241 | } |
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| 242 | } |
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| 243 | } |
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| 244 | return $rlist |
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| 245 | } |
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| 246 | |
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| 247 | # ---------------------------------------------------------------------- |
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| 248 | # USAGE: current ?<newval>? |
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| 249 | # |
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| 250 | # Clients use this to get/set the current value for this widget. |
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| 251 | # ---------------------------------------------------------------------- |
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| 252 | itcl::body Rappture::SequenceDial::current {args} { |
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| 253 | if {[llength $args] == 0} { |
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| 254 | return $_current |
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| 255 | } elseif {[llength $args] == 1} { |
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| 256 | set newval [lindex $args 0] |
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| 257 | set n [_findLabel $newval] |
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| 258 | |
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| 259 | # Don't use expr (?:) because it evaluates the resulting string. |
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| 260 | # For example, it changes -0.020 to -0.02. |
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| 261 | if { $n >= 0 } { |
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| 262 | set rawval [lindex $_values $n] |
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| 263 | } else { |
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| 264 | set rawval "" |
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| 265 | } |
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| 266 | _setCurrent $rawval |
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| 267 | |
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| 268 | EventuallyRedraw |
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| 269 | event generate $itk_component(hull) <<Value>> |
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| 270 | |
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| 271 | return $_current |
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| 272 | } |
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| 273 | error "wrong # args: should be \"current ?newval?\"" |
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| 274 | } |
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| 275 | |
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| 276 | # ---------------------------------------------------------------------- |
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| 277 | # USAGE: color <value> |
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| 278 | # |
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| 279 | # Clients use this to query the color associated with a <value> |
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| 280 | # along the dial. |
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| 281 | # ---------------------------------------------------------------------- |
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| 282 | itcl::body Rappture::SequenceDial::color {value} { |
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| 283 | _findLabel $value ;# make sure this label is recognized |
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| 284 | |
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| 285 | if {"" != $_spectrum} { |
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| 286 | foreach {min max} [_limits] break |
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| 287 | set frac [expr {double($value-$min)/($max-$min)}] |
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| 288 | set color [$_spectrum get $frac] |
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| 289 | } else { |
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| 290 | if {$value == $_current} { |
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| 291 | set color $_activecolor |
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| 292 | } else { |
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| 293 | set color $itk_option(-linecolor) |
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| 294 | } |
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| 295 | } |
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| 296 | return $color |
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| 297 | } |
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| 298 | |
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| 299 | # ---------------------------------------------------------------------- |
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| 300 | # USAGE: _setCurrent <value> |
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| 301 | # |
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| 302 | # Called automatically whenever the widget changes size to redraw |
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| 303 | # all elements within it. |
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| 304 | # ---------------------------------------------------------------------- |
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| 305 | itcl::body Rappture::SequenceDial::_setCurrent {value} { |
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| 306 | set _current $value |
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| 307 | if {"" != $_variable} { |
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| 308 | upvar #0 $_variable var |
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| 309 | if {[info exists _val2label($value)]} { |
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| 310 | set var [lindex $_val2label($value) 0] |
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| 311 | } else { |
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| 312 | set var $value |
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| 313 | } |
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| 314 | } |
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| 315 | } |
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| 316 | |
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| 317 | # ---------------------------------------------------------------------- |
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| 318 | # USAGE: _redraw |
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| 319 | # |
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| 320 | # Called automatically whenever the widget changes size to redraw |
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| 321 | # all elements within it. |
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| 322 | # ---------------------------------------------------------------------- |
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| 323 | itcl::body Rappture::SequenceDial::_redraw {} { |
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| 324 | |
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| 325 | set _redrawPending 0 |
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| 326 | |
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| 327 | set c $itk_component(dial) |
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| 328 | $c delete all |
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| 329 | |
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| 330 | set fg $itk_option(-foreground) |
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| 331 | |
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| 332 | set w [winfo width $c] |
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| 333 | set h [winfo height $c] |
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| 334 | set p [winfo pixels $c $itk_option(-padding)] |
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| 335 | set t [expr {$itk_option(-thickness)+1}] |
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| 336 | set y1 [expr {$h-1}] |
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| 337 | |
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| 338 | if {"" != $_knob} { |
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| 339 | set kw [image width $_knob] |
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| 340 | set kh [image height $_knob] |
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| 341 | |
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| 342 | switch -- $itk_option(-knobposition) { |
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| 343 | n@top - nw@top - ne@top { |
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| 344 | set extra [expr {$t-$kh}] |
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| 345 | if {$extra < 0} {set extra 0} |
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| 346 | set y1 [expr {$h-$extra-1}] |
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| 347 | } |
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| 348 | n@middle - nw@middle - ne@middle { |
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| 349 | set extra [expr {int(ceil($kh-0.5*$t))}] |
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| 350 | if {$extra < 0} {set extra 0} |
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| 351 | set y1 [expr {$h-$extra-1}] |
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| 352 | } |
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| 353 | n@bottom - nw@bottom - ne@bottom { |
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| 354 | set y1 [expr {$h-$kh-1}] |
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| 355 | } |
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| 356 | |
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| 357 | e@top - w@top - center@top - |
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| 358 | e@bottom - w@bottom - center@bottom { |
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| 359 | set extra [expr {int(ceil(0.5*$kh))}] |
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| 360 | set y1 [expr {$h-$extra-1}] |
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| 361 | } |
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| 362 | e@middle - w@middle - center@middle { |
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| 363 | set extra [expr {int(ceil(0.5*($kh-$t)))}] |
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| 364 | if {$extra < 0} {set extra 0} |
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| 365 | set y1 [expr {$h-$extra-1}] |
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| 366 | } |
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| 367 | |
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| 368 | s@top - sw@top - se@top - |
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| 369 | s@middle - sw@middle - se@middle - |
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| 370 | s@bottom - sw@bottom - se@bottom { |
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| 371 | set y1 [expr {$h-2}] |
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| 372 | } |
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| 373 | } |
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| 374 | } |
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| 375 | set y0 [expr {$y1-$t}] |
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| 376 | set x0 [expr {$p+1}] |
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| 377 | set x1 [expr {$w-$_vwidth-$p-4}] |
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| 378 | foreach {min max} [_limits] break |
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| 379 | |
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| 380 | # draw the background rectangle |
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| 381 | $c create rectangle $x0 $y0 $x1 $y1 \ |
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| 382 | -outline $itk_option(-dialoutlinecolor) \ |
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| 383 | -fill $itk_option(-dialfillcolor) -tags "range" |
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| 384 | |
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| 385 | # draw the optional progress bar, from start to current |
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| 386 | if {"" != $itk_option(-dialprogresscolor) |
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| 387 | && [llength $_values] > 0 && "" != $_current} { |
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| 388 | if {$max != $min} { |
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| 389 | set frac [expr {double($_current-$min)/($max-$min)}] |
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| 390 | } else { |
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| 391 | set frac 0. |
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| 392 | } |
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| 393 | set xx1 [expr {$frac*($x1-$x0) + $x0}] |
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| 394 | $c create rectangle [expr {$x0+1}] [expr {$y0+3}] $xx1 [expr {$y1-2}] \ |
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| 395 | -outline "" -fill $itk_option(-dialprogresscolor) |
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| 396 | } |
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| 397 | |
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| 398 | $c create rectangle $x0 $y0 $x1 $y1 -outline "" -fill "" -tags "range" |
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| 399 | |
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| 400 | # draw lines for all values |
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| 401 | if {$max > $min} { |
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| 402 | foreach v $_values { |
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| 403 | set frac [expr {double($v-$min)/($max-$min)}] |
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| 404 | if {"" != $_spectrum} { |
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| 405 | set color [$_spectrum get $frac] |
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| 406 | } else { |
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| 407 | if {$v == $_current} { |
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| 408 | set color $_activecolor |
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| 409 | } else { |
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| 410 | set color $itk_option(-linecolor) |
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| 411 | } |
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| 412 | } |
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| 413 | set thick [expr {($v == $_current) ? 3 : 1}] |
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| 414 | |
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| 415 | if {"" != $color} { |
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| 416 | set x [expr {$frac*($x1-$x0) + $x0}] |
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| 417 | $c create line $x [expr {$y0+1}] $x $y1 \ |
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| 418 | -fill $color -width $thick |
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| 419 | } |
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| 420 | } |
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| 421 | |
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| 422 | if {"" != $_current} { |
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| 423 | set x [expr {double($_current-$min)/($max-$min)*($x1-$x0) + $x0}] |
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| 424 | regexp {([nsew]+|center)@} $itk_option(-knobposition) match anchor |
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| 425 | switch -glob -- $itk_option(-knobposition) { |
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| 426 | *@top { set kpos $y0 } |
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| 427 | *@middle { set kpos [expr {int(ceil(0.5*($y1+$y0)))}] } |
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| 428 | *@bottom { set kpos $y1 } |
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| 429 | } |
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| 430 | $c create image $x $kpos -anchor $anchor -image $_knob -tags "knob" |
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| 431 | } |
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| 432 | } |
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| 433 | |
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| 434 | $c bind range <ButtonPress-1> [itcl::code $this _click %x %y] |
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| 435 | $c bind range <ButtonRelease-1> [itcl::code $this _click %x %y] |
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| 436 | |
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| 437 | # Only need release event for knob. |
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| 438 | $c bind knob <ButtonRelease-1> [itcl::code $this _click %x %y] |
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| 439 | |
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| 440 | # if the -valuewidth is > 0, then make room for the value |
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| 441 | set vw $itk_option(-valuewidth) |
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| 442 | if {$vw > 0 && "" != $_current} { |
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| 443 | set str [lindex $_val2label($_current) 0] |
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| 444 | if {[string length $str] >= $vw} { |
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| 445 | set str "[string range $str 0 [expr {$vw-3}]]..." |
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| 446 | } |
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| 447 | |
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| 448 | set dy [expr {([font metrics $itk_option(-font) -linespace] |
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| 449 | - [font metrics $itk_option(-font) -ascent])/2}] |
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| 450 | |
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| 451 | set id [$c create text [expr {$x1+4}] [expr {($y1+$y0)/2+$dy}] \ |
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| 452 | -anchor w -text $str -font $itk_option(-font) -foreground $fg] |
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| 453 | foreach {x0 y0 x1 y1} [$c bbox $id] break |
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| 454 | set x0 [expr {$x0 + 10}] |
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| 455 | |
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| 456 | # set up a tooltip so you can mouse over truncated values |
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| 457 | Rappture::Tooltip::text $c [lindex $_val2label($_current) 0] |
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| 458 | $c bind $id <Enter> \ |
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| 459 | [list ::Rappture::Tooltip::tooltip pending %W +$x0,$y1] |
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| 460 | $c bind $id <Leave> \ |
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| 461 | [list ::Rappture::Tooltip::tooltip cancel] |
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| 462 | $c bind $id <ButtonPress> \ |
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| 463 | [list ::Rappture::Tooltip::tooltip cancel] |
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| 464 | $c bind $id <KeyPress> \ |
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| 465 | [list ::Rappture::Tooltip::tooltip cancel] |
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| 466 | } |
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| 467 | } |
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| 468 | |
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| 469 | # ---------------------------------------------------------------------- |
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| 470 | # USAGE: _click <x> <y> |
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| 471 | # |
---|
| 472 | # Called automatically whenever the user clicks or drags on the widget |
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| 473 | # to select a value. Moves the current value to the one nearest the |
---|
| 474 | # click point. If the value actually changes, it generates a <<Value>> |
---|
| 475 | # event to notify clients. |
---|
| 476 | # ---------------------------------------------------------------------- |
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| 477 | itcl::body Rappture::SequenceDial::_click {x y} { |
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| 478 | set c $itk_component(dial) |
---|
| 479 | set w [winfo width $c] |
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| 480 | set h [winfo height $c] |
---|
| 481 | set x0 1 |
---|
| 482 | set x1 [expr {$w-$_vwidth-4}] |
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| 483 | |
---|
| 484 | focus $itk_component(hull) |
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| 485 | |
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| 486 | # draw lines for all values |
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| 487 | foreach {min max} [_limits] break |
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| 488 | if {$max > $min && $x >= $x0 && $x <= $x1} { |
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| 489 | set dmin $w |
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| 490 | set xnearest 0 |
---|
| 491 | set vnearest "" |
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| 492 | foreach v $_values { |
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| 493 | set xv [expr {double($v-$min)/($max-$min)*($x1-$x0) + $x0}] |
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| 494 | if {abs($xv-$x) < $dmin} { |
---|
| 495 | set dmin [expr {abs($xv-$x)}] |
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| 496 | set xnearest $xv |
---|
| 497 | set vnearest $v |
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| 498 | } |
---|
| 499 | } |
---|
| 500 | |
---|
| 501 | if {$vnearest != $_current} { |
---|
| 502 | _setCurrent $vnearest |
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| 503 | EventuallyRedraw |
---|
| 504 | |
---|
| 505 | #event generate $itk_component(hull) <<Value>> |
---|
| 506 | _doInteract |
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| 507 | } |
---|
| 508 | } |
---|
| 509 | } |
---|
| 510 | |
---|
| 511 | # ---------------------------------------------------------------------- |
---|
| 512 | # USAGE: _navigate <offset> |
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| 513 | # |
---|
| 514 | # Called automatically whenever the user presses left/right keys |
---|
| 515 | # to nudge the current value left or right by some <offset>. If the |
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| 516 | # value actually changes, it generates a <<Value>> event to notify |
---|
| 517 | # clients. |
---|
| 518 | # ---------------------------------------------------------------------- |
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| 519 | itcl::body Rappture::SequenceDial::_navigate {offset} { |
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| 520 | set index [lsearch -exact $_values $_current] |
---|
| 521 | if {$index >= 0} { |
---|
| 522 | incr index $offset |
---|
| 523 | if {$index >= [llength $_values]} { |
---|
| 524 | set index [expr {[llength $_values]-1}] |
---|
| 525 | } elseif {$index < 0} { |
---|
| 526 | set index 0 |
---|
| 527 | } |
---|
| 528 | |
---|
| 529 | set newval [lindex $_values $index] |
---|
| 530 | if {$newval != $_current} { |
---|
| 531 | _setCurrent $newval |
---|
| 532 | EventuallyRedraw |
---|
| 533 | |
---|
| 534 | event generate $itk_component(hull) <<Value>> |
---|
| 535 | _doInteract |
---|
| 536 | } |
---|
| 537 | } |
---|
| 538 | } |
---|
| 539 | |
---|
| 540 | # ---------------------------------------------------------------------- |
---|
| 541 | # USAGE: _limits |
---|
| 542 | # |
---|
| 543 | # Used internally to compute the overall min/max limits for the |
---|
| 544 | # radio dial. Returns {min max}, representing the end values for |
---|
| 545 | # the scale. |
---|
| 546 | # ---------------------------------------------------------------------- |
---|
| 547 | itcl::body Rappture::SequenceDial::_limits {} { |
---|
| 548 | if {[llength $_values] == 0} { |
---|
| 549 | set min 0 |
---|
| 550 | set max 0 |
---|
| 551 | } else { |
---|
| 552 | set min [lindex $_values 0] |
---|
| 553 | set max $min |
---|
| 554 | foreach v [lrange $_values 1 end] { |
---|
| 555 | if {$v < $min} { set min $v } |
---|
| 556 | if {$v > $max} { set max $v } |
---|
| 557 | } |
---|
| 558 | set del [expr {$max-$min}] |
---|
| 559 | set min [expr {$min-$itk_option(-valuepadding)*$del}] |
---|
| 560 | set max [expr {$max+$itk_option(-valuepadding)*$del}] |
---|
| 561 | } |
---|
| 562 | |
---|
| 563 | if {"" != $itk_option(-min)} { |
---|
| 564 | set min $itk_option(-min) |
---|
| 565 | } |
---|
| 566 | if {"" != $itk_option(-max)} { |
---|
| 567 | set max $itk_option(-max) |
---|
| 568 | } |
---|
| 569 | return [list $min $max] |
---|
| 570 | } |
---|
| 571 | |
---|
| 572 | # ---------------------------------------------------------------------- |
---|
| 573 | # USAGE: _findLabel <string> |
---|
| 574 | # |
---|
| 575 | # Used internally to search for the given <string> label among the |
---|
| 576 | # known values. Returns an index into the _values list, or throws |
---|
| 577 | # an error if the string is not recognized. Given the null string, |
---|
| 578 | # it returns -1, indicating that the value is not in _values, but |
---|
| 579 | # it is valid. |
---|
| 580 | # ---------------------------------------------------------------------- |
---|
| 581 | itcl::body Rappture::SequenceDial::_findLabel {str} { |
---|
| 582 | if {"" == $str} { |
---|
| 583 | return -1 |
---|
| 584 | } |
---|
| 585 | for {set nv 0} {$nv < [llength $_values]} {incr nv} { |
---|
| 586 | set v [lindex $_values $nv] |
---|
| 587 | if {[lsearch -exact $_val2label($v) $str] >= 0} { |
---|
| 588 | return $nv |
---|
| 589 | } |
---|
| 590 | } |
---|
| 591 | |
---|
| 592 | # didn't match -- build a return string of possible values |
---|
| 593 | set labels "" |
---|
| 594 | foreach vlist $_values { |
---|
| 595 | foreach v $vlist { |
---|
| 596 | lappend labels "\"$_val2label($v)\"" |
---|
| 597 | } |
---|
| 598 | } |
---|
| 599 | error "bad value \"$str\": should be one of [join $labels ,]" |
---|
| 600 | } |
---|
| 601 | |
---|
| 602 | # ---------------------------------------------------------------------- |
---|
| 603 | # USAGE: _fixSize |
---|
| 604 | # |
---|
| 605 | # Used internally to compute the overall size of the widget based |
---|
| 606 | # on the -thickness and -length options. |
---|
| 607 | # ---------------------------------------------------------------------- |
---|
| 608 | itcl::body Rappture::SequenceDial::_fixSize {} { |
---|
| 609 | set h [winfo pixels $itk_component(hull) $itk_option(-thickness)] |
---|
| 610 | |
---|
| 611 | if {"" != $_knob} { |
---|
| 612 | set kh [image height $_knob] |
---|
| 613 | |
---|
| 614 | switch -- $itk_option(-knobposition) { |
---|
| 615 | n@top - nw@top - ne@top - |
---|
| 616 | s@bottom - sw@bottom - se@bottom { |
---|
| 617 | if {$kh > $h} { set h $kh } |
---|
| 618 | } |
---|
| 619 | n@middle - nw@middle - ne@middle - |
---|
| 620 | s@middle - sw@middle - se@middle { |
---|
| 621 | set h [expr {int(ceil(0.5*$h + $kh))}] |
---|
| 622 | } |
---|
| 623 | n@bottom - nw@bottom - ne@bottom - |
---|
| 624 | s@top - sw@top - se@top { |
---|
| 625 | set h [expr {$h + $kh}] |
---|
| 626 | } |
---|
| 627 | e@middle - w@middle - center@middle { |
---|
| 628 | set h [expr {(($h > $kh) ? $h : $kh) + 1}] |
---|
| 629 | } |
---|
| 630 | n@middle - ne@middle - nw@middle - |
---|
| 631 | s@middle - se@middle - sw@middle { |
---|
| 632 | set extra [expr {int(ceil($kh-0.5*$h))}] |
---|
| 633 | if {$extra < 0} { set extra 0 } |
---|
| 634 | set h [expr {$h+$extra}] |
---|
| 635 | } |
---|
| 636 | } |
---|
| 637 | } |
---|
| 638 | incr h 1 |
---|
| 639 | |
---|
| 640 | set w [winfo pixels $itk_component(hull) $itk_option(-length)] |
---|
| 641 | |
---|
| 642 | # if the -valuewidth is > 0, then make room for the value |
---|
| 643 | if {$itk_option(-valuewidth) > 0} { |
---|
| 644 | set charw [font measure $itk_option(-font) "n"] |
---|
| 645 | set _vwidth [expr {$itk_option(-valuewidth)*$charw}] |
---|
| 646 | set w [expr {$w+$_vwidth+4}] |
---|
| 647 | } else { |
---|
| 648 | set _vwidth 0 |
---|
| 649 | } |
---|
| 650 | |
---|
| 651 | $itk_component(dial) configure -width $w -height $h |
---|
| 652 | } |
---|
| 653 | |
---|
| 654 | # ---------------------------------------------------------------------- |
---|
| 655 | # USAGE: _fixValue ?<name1> <name2> <op>? |
---|
| 656 | # |
---|
| 657 | # Invoked automatically whenever the -variable associated with this |
---|
| 658 | # widget is modified. Copies the value to the current settings for |
---|
| 659 | # the widget. |
---|
| 660 | # ---------------------------------------------------------------------- |
---|
| 661 | itcl::body Rappture::SequenceDial::_fixValue {args} { |
---|
| 662 | if {"" == $itk_option(-variable)} { |
---|
| 663 | return |
---|
| 664 | } |
---|
| 665 | upvar #0 $itk_option(-variable) var |
---|
| 666 | |
---|
| 667 | set newval $var |
---|
| 668 | set n [_findLabel $newval] |
---|
| 669 | set rawval [expr {($n >= 0) ? [lindex $_values $n] : ""}] |
---|
| 670 | set _current $rawval ;# set current directly, so we don't trigger again |
---|
| 671 | |
---|
| 672 | EventuallyRedraw |
---|
| 673 | event generate $itk_component(hull) <<Value>> |
---|
| 674 | } |
---|
| 675 | |
---|
| 676 | # ---------------------------------------------------------------------- |
---|
| 677 | # USAGE: _doInteract |
---|
| 678 | # |
---|
| 679 | # Used internally to call the -interactcommand code whenever the user |
---|
| 680 | # changes the value of the widget. This is different from the <<Value>> |
---|
| 681 | # event, which gets invoked whenever the value changes for any reason, |
---|
| 682 | # including programmatic changes. If there is no command code, then |
---|
| 683 | # this does nothing. |
---|
| 684 | # ---------------------------------------------------------------------- |
---|
| 685 | itcl::body Rappture::SequenceDial::_doInteract {} { |
---|
| 686 | if {[string length $itk_option(-interactcommand)] > 0} { |
---|
| 687 | uplevel #0 $itk_option(-interactcommand) |
---|
| 688 | } |
---|
| 689 | } |
---|
| 690 | |
---|
| 691 | # ---------------------------------------------------------------------- |
---|
| 692 | # CONFIGURE: -thickness |
---|
| 693 | # ---------------------------------------------------------------------- |
---|
| 694 | itcl::configbody Rappture::SequenceDial::thickness { |
---|
| 695 | _fixSize |
---|
| 696 | } |
---|
| 697 | |
---|
| 698 | # ---------------------------------------------------------------------- |
---|
| 699 | # CONFIGURE: -length |
---|
| 700 | # ---------------------------------------------------------------------- |
---|
| 701 | itcl::configbody Rappture::SequenceDial::length { |
---|
| 702 | _fixSize |
---|
| 703 | } |
---|
| 704 | |
---|
| 705 | # ---------------------------------------------------------------------- |
---|
| 706 | # CONFIGURE: -font |
---|
| 707 | # ---------------------------------------------------------------------- |
---|
| 708 | itcl::configbody Rappture::SequenceDial::font { |
---|
| 709 | _fixSize |
---|
| 710 | } |
---|
| 711 | |
---|
| 712 | # ---------------------------------------------------------------------- |
---|
| 713 | # CONFIGURE: -valuewidth |
---|
| 714 | # ---------------------------------------------------------------------- |
---|
| 715 | itcl::configbody Rappture::SequenceDial::valuewidth { |
---|
| 716 | if {![string is integer $itk_option(-valuewidth)]} { |
---|
| 717 | error "bad value \"$itk_option(-valuewidth)\": should be integer" |
---|
| 718 | } |
---|
| 719 | _fixSize |
---|
| 720 | EventuallyRedraw |
---|
| 721 | } |
---|
| 722 | |
---|
| 723 | # ---------------------------------------------------------------------- |
---|
| 724 | # CONFIGURE: -foreground |
---|
| 725 | # ---------------------------------------------------------------------- |
---|
| 726 | itcl::configbody Rappture::SequenceDial::foreground { |
---|
| 727 | EventuallyRedraw |
---|
| 728 | } |
---|
| 729 | |
---|
| 730 | # ---------------------------------------------------------------------- |
---|
| 731 | # CONFIGURE: -dialoutlinecolor |
---|
| 732 | # ---------------------------------------------------------------------- |
---|
| 733 | itcl::configbody Rappture::SequenceDial::dialoutlinecolor { |
---|
| 734 | EventuallyRedraw |
---|
| 735 | } |
---|
| 736 | |
---|
| 737 | # ---------------------------------------------------------------------- |
---|
| 738 | # CONFIGURE: -dialfillcolor |
---|
| 739 | # ---------------------------------------------------------------------- |
---|
| 740 | itcl::configbody Rappture::SequenceDial::dialfillcolor { |
---|
| 741 | EventuallyRedraw |
---|
| 742 | } |
---|
| 743 | |
---|
| 744 | # ---------------------------------------------------------------------- |
---|
| 745 | # CONFIGURE: -dialprogresscolor |
---|
| 746 | # ---------------------------------------------------------------------- |
---|
| 747 | itcl::configbody Rappture::SequenceDial::dialprogresscolor { |
---|
| 748 | EventuallyRedraw |
---|
| 749 | } |
---|
| 750 | |
---|
| 751 | # ---------------------------------------------------------------------- |
---|
| 752 | # CONFIGURE: -linecolor |
---|
| 753 | # ---------------------------------------------------------------------- |
---|
| 754 | itcl::configbody Rappture::SequenceDial::linecolor { |
---|
| 755 | EventuallyRedraw |
---|
| 756 | } |
---|
| 757 | |
---|
| 758 | # ---------------------------------------------------------------------- |
---|
| 759 | # CONFIGURE: -activelinecolor |
---|
| 760 | # ---------------------------------------------------------------------- |
---|
| 761 | itcl::configbody Rappture::SequenceDial::activelinecolor { |
---|
| 762 | set val $itk_option(-activelinecolor) |
---|
| 763 | if {[catch {$val isa ::Rappture::Spectrum} valid] == 0 && $valid} { |
---|
| 764 | set _spectrum $val |
---|
| 765 | set _activecolor "" |
---|
| 766 | } elseif {[catch {winfo rgb $itk_component(hull) $val}] == 0} { |
---|
| 767 | set _spectrum "" |
---|
| 768 | set _activecolor $val |
---|
| 769 | } elseif {"" != $val} { |
---|
| 770 | error "bad value \"$val\": should be Spectrum object or color" |
---|
| 771 | } |
---|
| 772 | EventuallyRedraw |
---|
| 773 | } |
---|
| 774 | |
---|
| 775 | # ---------------------------------------------------------------------- |
---|
| 776 | # CONFIGURE: -knobimage |
---|
| 777 | # ---------------------------------------------------------------------- |
---|
| 778 | itcl::configbody Rappture::SequenceDial::knobimage { |
---|
| 779 | if {[regexp {^image[0-9]+$} $itk_option(-knobimage)]} { |
---|
| 780 | set _knob $itk_option(-knobimage) |
---|
| 781 | } elseif {"" != $itk_option(-knobimage)} { |
---|
| 782 | set _knob [Rappture::icon $itk_option(-knobimage)] |
---|
| 783 | } else { |
---|
| 784 | set _knob "" |
---|
| 785 | } |
---|
| 786 | _fixSize |
---|
| 787 | |
---|
| 788 | EventuallyRedraw |
---|
| 789 | } |
---|
| 790 | |
---|
| 791 | # ---------------------------------------------------------------------- |
---|
| 792 | # CONFIGURE: -knobposition |
---|
| 793 | # ---------------------------------------------------------------------- |
---|
| 794 | itcl::configbody Rappture::SequenceDial::knobposition { |
---|
| 795 | if {![regexp {^([nsew]+|center)@(top|middle|bottom)$} $itk_option(-knobposition)]} { |
---|
| 796 | error "bad value \"$itk_option(-knobposition)\": should be anchor@top|middle|bottom" |
---|
| 797 | } |
---|
| 798 | _fixSize |
---|
| 799 | |
---|
| 800 | EventuallyRedraw |
---|
| 801 | } |
---|
| 802 | |
---|
| 803 | # ---------------------------------------------------------------------- |
---|
| 804 | # CONFIGURE: -padding |
---|
| 805 | # This adds padding on left/right side of dial background. |
---|
| 806 | # ---------------------------------------------------------------------- |
---|
| 807 | itcl::configbody Rappture::SequenceDial::padding { |
---|
| 808 | if {[catch {winfo pixels $itk_component(hull) $itk_option(-padding)}]} { |
---|
| 809 | error "bad value \"$itk_option(-padding)\": should be size in pixels" |
---|
| 810 | } |
---|
| 811 | } |
---|
| 812 | |
---|
| 813 | # ---------------------------------------------------------------------- |
---|
| 814 | # CONFIGURE: -valuepadding |
---|
| 815 | # This shifts min/max limits in by a fraction of the overall size. |
---|
| 816 | # ---------------------------------------------------------------------- |
---|
| 817 | itcl::configbody Rappture::SequenceDial::valuepadding { |
---|
| 818 | if {![string is double $itk_option(-valuepadding)] |
---|
| 819 | || $itk_option(-valuepadding) < 0} { |
---|
| 820 | error "bad value \"$itk_option(-valuepadding)\": should be >= 0.0" |
---|
| 821 | } |
---|
| 822 | } |
---|
| 823 | |
---|
| 824 | # ---------------------------------------------------------------------- |
---|
| 825 | # CONFIGURE: -variable |
---|
| 826 | # ---------------------------------------------------------------------- |
---|
| 827 | itcl::configbody Rappture::SequenceDial::variable { |
---|
| 828 | if {"" != $_variable} { |
---|
| 829 | upvar #0 $_variable var |
---|
| 830 | trace remove variable var write [itcl::code $this _fixValue] |
---|
| 831 | } |
---|
| 832 | |
---|
| 833 | set _variable $itk_option(-variable) |
---|
| 834 | |
---|
| 835 | if {"" != $_variable} { |
---|
| 836 | upvar #0 $_variable var |
---|
| 837 | trace add variable var write [itcl::code $this _fixValue] |
---|
| 838 | |
---|
| 839 | # sync to the current value of this variable |
---|
| 840 | if {[info exists var]} { |
---|
| 841 | _fixValue |
---|
| 842 | } |
---|
| 843 | } |
---|
| 844 | } |
---|