| 1 | # -*- mode: tcl; indent-tabs-mode: nil -*- |
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| 2 | # ---------------------------------------------------------------------- |
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| 3 | # COMPONENT: tooltip - help information that pops up beneath a widget |
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| 4 | # |
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| 5 | # This file provides support for tooltips, which are little bits |
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| 6 | # of help information that pop up beneath a widget. |
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| 7 | # |
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| 8 | # Tooltips can be registered for various widgets as follows: |
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| 9 | # |
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| 10 | # Rappture::Tooltip::for .w "Some help text." |
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| 11 | # Rappture::Tooltip::for .x.y "Some more help text." |
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| 12 | # |
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| 13 | # Tooltips can also be popped up as an error cue beneath a widget |
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| 14 | # with bad information: |
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| 15 | # |
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| 16 | # Rappture::Tooltip::cue .w "Bad data in this widget." |
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| 17 | # |
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| 18 | # ====================================================================== |
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| 19 | # AUTHOR: Michael McLennan, Purdue University |
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| 20 | # Copyright (c) 2004-2012 HUBzero Foundation, LLC |
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| 21 | # |
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| 22 | # See the file "license.terms" for information on usage and |
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| 23 | # redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
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| 24 | # ====================================================================== |
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| 25 | package require Itk |
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| 26 | |
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| 27 | option add *Tooltip.background white widgetDefault |
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| 28 | option add *Tooltip.outline black widgetDefault |
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| 29 | option add *Tooltip.borderwidth 1 widgetDefault |
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| 30 | option add *Tooltip.font -*-helvetica-medium-r-normal-*-12-* widgetDefault |
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| 31 | option add *Tooltip.wrapLength 4i widgetDefault |
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| 32 | |
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| 33 | itcl::class Rappture::Tooltip { |
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| 34 | inherit itk::Toplevel |
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| 35 | |
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| 36 | itk_option define -outline outline Outline "" |
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| 37 | itk_option define -icon icon Icon "" |
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| 38 | itk_option define -message message Message "" |
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| 39 | itk_option define -log log Log "" |
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| 40 | |
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| 41 | constructor {args} { # defined below } |
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| 42 | |
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| 43 | public method show {where} |
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| 44 | public method hide {} |
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| 45 | |
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| 46 | private variable _showing 0 ;# time when tooltip popped up on screen |
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| 47 | |
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| 48 | public proc for {widget text args} |
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| 49 | public proc text {widget args} |
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| 50 | private common catalog ;# maps widget => -message and -log |
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| 51 | |
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| 52 | public proc tooltip {option args} |
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| 53 | private common pending "" ;# after ID for pending "tooltip show" |
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| 54 | |
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| 55 | public proc cue {option args} |
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| 56 | |
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| 57 | bind RapptureTooltip <Enter> \ |
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| 58 | [list ::Rappture::Tooltip::tooltip pending %W] |
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| 59 | bind RapptureTooltip <Leave> \ |
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| 60 | [list ::Rappture::Tooltip::tooltip cancel] |
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| 61 | bind RapptureTooltip <ButtonPress> \ |
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| 62 | [list ::Rappture::Tooltip::tooltip cancel] |
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| 63 | bind RapptureTooltip <KeyPress> \ |
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| 64 | [list ::Rappture::Tooltip::tooltip cancel] |
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| 65 | } |
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| 66 | |
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| 67 | itk::usual Tooltip { |
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| 68 | keep -background -outline -cursor -font |
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| 69 | } |
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| 70 | |
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| 71 | # ---------------------------------------------------------------------- |
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| 72 | # CONSTRUCTOR |
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| 73 | # ---------------------------------------------------------------------- |
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| 74 | itcl::body Rappture::Tooltip::constructor {args} { |
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| 75 | wm overrideredirect $itk_component(hull) yes |
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| 76 | wm withdraw $itk_component(hull) |
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| 77 | |
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| 78 | component hull configure -borderwidth 1 -background black |
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| 79 | itk_option remove hull.background hull.borderwidth |
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| 80 | |
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| 81 | itk_component add icon { |
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| 82 | label $itk_interior.icon -anchor n |
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| 83 | } |
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| 84 | |
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| 85 | itk_component add text { |
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| 86 | label $itk_interior.text -justify left |
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| 87 | } { |
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| 88 | usual |
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| 89 | keep -wraplength |
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| 90 | } |
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| 91 | pack $itk_component(text) -expand yes -fill both -ipadx 4 -ipady 4 |
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| 92 | |
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| 93 | eval itk_initialize $args |
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| 94 | } |
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| 95 | |
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| 96 | # ---------------------------------------------------------------------- |
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| 97 | # USAGE: show @<x>,<y>|<widget>+/-<x>,<y> |
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| 98 | # |
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| 99 | # Clients use this to pop up the tooltip on the screen. The position |
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| 100 | # should be either a <widget> name with an optional offset +/-<x>,<y> |
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| 101 | # (tooltip pops up beneath widget by default), or a specific root |
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| 102 | # window coordinate of the form @x,y. |
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| 103 | # |
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| 104 | # If the -message has the form "@command", then the command is executed |
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| 105 | # now, just before the tooltip is popped up, to build the message |
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| 106 | # on-the-fly. |
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| 107 | # ---------------------------------------------------------------------- |
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| 108 | itcl::body Rappture::Tooltip::show {where} { |
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| 109 | set hull $itk_component(hull) |
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| 110 | set _showing 0 |
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| 111 | |
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| 112 | set signx "+" |
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| 113 | set signy "+" |
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| 114 | |
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| 115 | if {[regexp {^@([0-9]+),([0-9]+)$} $where match x y]} { |
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| 116 | set xpos $x |
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| 117 | set ypos $y |
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| 118 | } elseif {[regexp {^(.*)([-+])([0-9]+),([-+]?)([0-9]+)$} $where match win signx x signy y]} { |
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| 119 | if {$signy == ""} { set signy $signx } |
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| 120 | set xpos [expr {[winfo rootx $win] + $x}] |
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| 121 | set ypos [expr {[winfo rooty $win] + $y}] |
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| 122 | } elseif {[winfo exists $where]} { |
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| 123 | set xpos [expr {[winfo rootx $where]+10}] |
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| 124 | set ypos [expr {[winfo rooty $where]+[winfo height $where]}] |
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| 125 | } else { |
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| 126 | error "bad position \"$where\": should be widget+x,y, or @x,y" |
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| 127 | } |
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| 128 | |
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| 129 | if {[string index $itk_option(-message) 0] == "@"} { |
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| 130 | set cmd [string range $itk_option(-message) 1 end] |
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| 131 | if {[catch $cmd mesg] != 0} { |
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| 132 | bgerror $mesg |
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| 133 | return |
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| 134 | } |
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| 135 | } else { |
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| 136 | set mesg $itk_option(-message) |
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| 137 | } |
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| 138 | |
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| 139 | # if there's no message to show, forget it |
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| 140 | if {[string length $mesg] == 0} { |
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| 141 | return |
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| 142 | } |
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| 143 | |
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| 144 | # strings can't be too big, or they'll go off screen! |
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| 145 | set pos 0 |
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| 146 | ::for {set i 0} {$pos >= 0 && $i < 20} {incr i} { |
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| 147 | incr pos |
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| 148 | set pos [string first \n $mesg $pos] |
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| 149 | } |
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| 150 | if {$pos > 0} { |
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| 151 | set mesg "[string range $mesg 0 $pos]..." |
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| 152 | } |
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| 153 | if {[string length $mesg] > 1000} { |
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| 154 | set mesg "[string range $mesg 0 1500]..." |
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| 155 | } |
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| 156 | $itk_component(text) configure -text $mesg |
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| 157 | |
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| 158 | # |
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| 159 | # Make sure the tooltip doesn't go off screen. |
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| 160 | # |
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| 161 | update idletasks |
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| 162 | if {$signx == "+"} { |
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| 163 | if {$xpos+[winfo reqwidth $hull] > [winfo screenwidth $hull]} { |
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| 164 | set xpos [expr {[winfo screenwidth $hull]-[winfo reqwidth $hull]}] |
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| 165 | } |
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| 166 | if {$xpos < 0} { set xpos 0 } |
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| 167 | } else { |
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| 168 | if {$xpos-[winfo reqwidth $hull] < 0} { |
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| 169 | set xpos [expr {[winfo screenwidth $hull]-[winfo reqwidth $hull]}] |
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| 170 | } |
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| 171 | set xpos [expr {[winfo screenwidth $hull]-$xpos}] |
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| 172 | } |
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| 173 | |
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| 174 | if {$signy == "+"} { |
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| 175 | if {$ypos+[winfo reqheight $hull] > [winfo screenheight $hull]} { |
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| 176 | set ypos [expr {[winfo screenheight $hull]-[winfo reqheight $hull]}] |
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| 177 | } |
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| 178 | if {$ypos < 0} { set ypos 0 } |
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| 179 | } else { |
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| 180 | if {$ypos-[winfo reqheight $hull] < 0} { |
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| 181 | set ypos [expr {[winfo screenheight $hull]-[winfo reqheight $hull]}] |
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| 182 | } |
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| 183 | set ypos [expr {[winfo screenheight $hull]-$ypos}] |
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| 184 | } |
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| 185 | |
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| 186 | # |
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| 187 | # Will the tooltip pop up under the mouse pointer? If so, then |
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| 188 | # it will just disappear. Doh! We should figure out a better |
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| 189 | # place to pop it up. |
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| 190 | # |
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| 191 | set px [winfo pointerx $hull] |
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| 192 | set py [winfo pointery $hull] |
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| 193 | if {$px >= $xpos && $px <= $xpos+[winfo reqwidth $hull] |
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| 194 | && $py >= $ypos && $py <= $ypos+[winfo reqheight $hull]} { |
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| 195 | |
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| 196 | if {$px > [winfo screenwidth $hull]/2} { |
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| 197 | set signx "-" |
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| 198 | set xpos [expr {[winfo screenwidth $hull]-$px+4}] |
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| 199 | } else { |
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| 200 | set signx "+" |
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| 201 | set xpos [expr {$px+4}] |
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| 202 | } |
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| 203 | if {$py > [winfo screenheight $hull]/2} { |
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| 204 | set signy "-" |
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| 205 | set ypos [expr {[winfo screenheight $hull]-$py+4}] |
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| 206 | } else { |
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| 207 | set signy "+" |
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| 208 | set ypos [expr {$py+4}] |
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| 209 | } |
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| 210 | } |
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| 211 | |
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| 212 | # |
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| 213 | # Finally, put it up. |
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| 214 | # |
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| 215 | wm geometry $hull $signx$xpos$signy$ypos |
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| 216 | update |
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| 217 | |
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| 218 | wm deiconify $hull |
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| 219 | raise $hull |
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| 220 | |
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| 221 | # |
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| 222 | # If logging is enabled, grab the start time. We'll need this |
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| 223 | # info later during the "hide" step to log activity. |
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| 224 | # |
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| 225 | if {$itk_option(-log) ne ""} { |
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| 226 | set _showing [clock seconds] |
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| 227 | } |
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| 228 | } |
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| 229 | |
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| 230 | # ---------------------------------------------------------------------- |
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| 231 | # USAGE: hide |
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| 232 | # |
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| 233 | # Takes down the tooltip, if it is showing on the screen. |
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| 234 | # ---------------------------------------------------------------------- |
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| 235 | itcl::body Rappture::Tooltip::hide {} { |
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| 236 | wm withdraw $itk_component(hull) |
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| 237 | |
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| 238 | # |
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| 239 | # If logging is enabled and the time is non-zero, then log |
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| 240 | # the activity on this tooltip. |
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| 241 | # |
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| 242 | if {$itk_option(-log) ne "" && $_showing > 0} { |
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| 243 | set dt [expr {[clock seconds] - $_showing}] |
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| 244 | if {$dt > 0} { |
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| 245 | Rappture::Logger::log tooltip -for $itk_option(-log) -time $dt |
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| 246 | } |
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| 247 | } |
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| 248 | set _showing 0 |
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| 249 | } |
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| 250 | |
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| 251 | # ---------------------------------------------------------------------- |
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| 252 | # USAGE: for <widget> <text> ?-log <name>? |
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| 253 | # |
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| 254 | # Used to register the tooltip <text> for a particular <widget>. |
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| 255 | # This sets up bindings on the widget so that, when the mouse pointer |
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| 256 | # lingers over the widget, the tooltip pops up automatically after |
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| 257 | # a small delay. When the mouse pointer leaves the widget or the |
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| 258 | # user clicks on the widget, it cancels the tip. |
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| 259 | # |
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| 260 | # If the <text> has the form "@command", then the command is executed |
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| 261 | # just before the tip pops up to build the message on-the-fly. |
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| 262 | # |
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| 263 | # The -log option turns logging on/off for this tooltip. Logging is |
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| 264 | # useful when you want to keep track of whether the user is looking at |
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| 265 | # tooltips and for how long. If the <name> is specified, then any |
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| 266 | # activity on the tooltip is reported with that name on the log line. |
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| 267 | # If the name is not specified or "", then the activity is not logged. |
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| 268 | # ---------------------------------------------------------------------- |
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| 269 | itcl::body Rappture::Tooltip::for {widget text args} { |
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| 270 | Rappture::getopts args params { |
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| 271 | value -log "" |
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| 272 | } |
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| 273 | if {[llength $args] > 0} { |
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| 274 | error "wrong # args: should be \"for widget text ?-log name?\"" |
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| 275 | } |
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| 276 | |
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| 277 | set catalog($widget-message) $text |
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| 278 | set catalog($widget-log) $params(-log) |
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| 279 | |
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| 280 | set btags [bindtags $widget] |
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| 281 | set i [lsearch $btags RapptureTooltip] |
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| 282 | if {$i < 0} { |
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| 283 | set i [lsearch $btags [winfo class $widget]] |
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| 284 | if {$i < 0} {set i 0} |
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| 285 | set btags [linsert $btags $i RapptureTooltip] |
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| 286 | bindtags $widget $btags |
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| 287 | } |
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| 288 | } |
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| 289 | |
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| 290 | # ---------------------------------------------------------------------- |
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| 291 | # USAGE: text <widget> ?<text>? ?-log name? |
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| 292 | # |
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| 293 | # Used to query or set the text used for the tooltip for a widget. |
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| 294 | # This is done automatically when you call the "for" proc, but it |
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| 295 | # is sometimes handy to query or change the text later. |
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| 296 | # ---------------------------------------------------------------------- |
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| 297 | itcl::body Rappture::Tooltip::text {widget args} { |
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| 298 | if {[llength $args] == 0} { |
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| 299 | if {[info exists catalog($widget-message)]} { |
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| 300 | return $catalog($widget-message) |
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| 301 | } |
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| 302 | return "" |
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| 303 | } |
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| 304 | |
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| 305 | # set the text for the tooltip |
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| 306 | set str [lindex $args 0] |
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| 307 | set args [lrange $args 1 end] |
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| 308 | |
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| 309 | Rappture::getopts args params { |
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| 310 | value -log "" |
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| 311 | } |
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| 312 | if {[llength $args] > 0} { |
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| 313 | error "wrong # args: should be \"text widget ?str? ?-log name?\"" |
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| 314 | } |
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| 315 | |
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| 316 | set catalog($widget-message) $str |
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| 317 | set catalog($widget-log) $params(-log) |
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| 318 | } |
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| 319 | |
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| 320 | # ---------------------------------------------------------------------- |
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| 321 | # USAGE: tooltip pending <widget> ?@<x>,<y>|+<x>,<y>? |
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| 322 | # USAGE: tooltip show <widget> ?@<x>,<y>|+<x>,<y>? |
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| 323 | # USAGE: tooltip cancel |
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| 324 | # |
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| 325 | # This is invoked automatically whenever the user clicks somewhere |
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| 326 | # inside or outside of the editor. If the <X>,<Y> coordinate is |
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| 327 | # outside the editor, then we assume the user is done and wants to |
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| 328 | # take the editor down. Otherwise, we do nothing, and let the entry |
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| 329 | # bindings take over. |
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| 330 | # ---------------------------------------------------------------------- |
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| 331 | itcl::body Rappture::Tooltip::tooltip {option args} { |
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| 332 | switch -- $option { |
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| 333 | pending { |
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| 334 | if {[llength $args] < 1 || [llength $args] > 2} { |
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| 335 | error "wrong # args: should be \"tooltip pending widget ?@x,y?\"" |
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| 336 | } |
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| 337 | set widget [lindex $args 0] |
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| 338 | set loc [lindex $args 1] |
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| 339 | |
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| 340 | if {![info exists catalog($widget-message)]} { |
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| 341 | return; # No tooltip for widget. |
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| 342 | } |
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| 343 | if {$pending != ""} { |
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| 344 | after cancel $pending |
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| 345 | } |
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| 346 | set pending [after 750 [itcl::code tooltip show $widget $loc]] |
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| 347 | } |
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| 348 | show { |
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| 349 | if {[llength $args] < 1 || [llength $args] > 2} { |
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| 350 | error "wrong # args: should be \"tooltip show tag loc\"" |
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| 351 | } |
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| 352 | set tag [lindex $args 0] |
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| 353 | set loc [lindex $args 1] |
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| 354 | |
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| 355 | # tag name may be .g-axis -- get widget ".g" part |
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| 356 | set widget $tag |
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| 357 | if {[regexp {^(\.[^-]+)-[^\.]+$} $widget match wname]} { |
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| 358 | set widget $wname |
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| 359 | } |
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| 360 | |
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| 361 | if {[winfo exists $widget] && [info exists catalog($tag-message)]} { |
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| 362 | .rappturetooltip configure \ |
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| 363 | -message $catalog($tag-message) \ |
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| 364 | -log $catalog($tag-log) |
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| 365 | |
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| 366 | if {[string index $loc 0] == "@"} { |
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| 367 | .rappturetooltip show $loc |
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| 368 | } elseif {[regexp {^[-+]} $loc]} { |
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| 369 | .rappturetooltip show $widget$loc |
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| 370 | } else { |
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| 371 | .rappturetooltip show $widget |
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| 372 | } |
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| 373 | } |
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| 374 | } |
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| 375 | cancel { |
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| 376 | if {$pending != ""} { |
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| 377 | after cancel $pending |
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| 378 | set pending "" |
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| 379 | } |
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| 380 | .rappturetooltip hide |
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| 381 | } |
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| 382 | default { |
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| 383 | error "bad option \"$option\": should be show, pending, cancel" |
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| 384 | } |
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| 385 | } |
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| 386 | } |
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| 387 | |
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| 388 | # ---------------------------------------------------------------------- |
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| 389 | # USAGE: cue <location> <message> |
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| 390 | # USAGE: cue hide |
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| 391 | # |
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| 392 | # Clients use this to show a <message> in a tooltip cue at the |
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| 393 | # specified <location>, which can be a widget name or a root coordinate |
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| 394 | # at @x,y. |
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| 395 | # ---------------------------------------------------------------------- |
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| 396 | itcl::body Rappture::Tooltip::cue {option args} { |
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| 397 | if {"hide" == $option} { |
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| 398 | grab release .rappturetoolcue |
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| 399 | .rappturetoolcue hide |
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| 400 | } elseif {[regexp {^@[0-9]+,[0-9]+$} $option] || [winfo exists $option]} { |
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| 401 | if {[llength $args] != 1} { |
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| 402 | error "wrong # args: should be \"cue location message\"" |
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| 403 | } |
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| 404 | set loc $option |
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| 405 | set mesg [lindex $args 0] |
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| 406 | |
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| 407 | .rappturetoolcue configure -message $mesg |
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| 408 | .rappturetoolcue show $loc |
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| 409 | |
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| 410 | # |
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| 411 | # Add a binding to all widgets so that any keypress will |
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| 412 | # take this cue down. |
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| 413 | # |
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| 414 | set cmd [bind all <KeyPress>] |
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| 415 | if {![regexp {Rappture::Tooltip::cue} $cmd]} { |
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| 416 | bind all <KeyPress> "+[list ::Rappture::Tooltip::cue hide]" |
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| 417 | bind all <KeyPress-Return> "+ " |
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| 418 | } |
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| 419 | |
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| 420 | # |
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| 421 | # If nobody has the pointer, then grab it. Otherwise, |
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| 422 | # we assume the pop-up editor or someone like that has |
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| 423 | # the grab, so we don't need to impose a grab here. |
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| 424 | # |
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| 425 | if {"" == [grab current]} { |
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| 426 | update |
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| 427 | while {[catch {grab set -global .rappturetoolcue}]} { |
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| 428 | after 100 |
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| 429 | } |
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| 430 | } |
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| 431 | } else { |
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| 432 | error "bad option \"$option\": should be hide, a widget name, or @x,y" |
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| 433 | } |
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| 434 | } |
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| 435 | |
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| 436 | # ---------------------------------------------------------------------- |
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| 437 | # CONFIGURATION OPTION: -icon |
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| 438 | # ---------------------------------------------------------------------- |
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| 439 | itcl::configbody Rappture::Tooltip::icon { |
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| 440 | if {"" == $itk_option(-icon)} { |
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| 441 | $itk_component(icon) configure -image "" |
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| 442 | pack forget $itk_component(icon) |
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| 443 | } else { |
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| 444 | $itk_component(icon) configure -image $itk_option(-icon) |
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| 445 | pack $itk_component(icon) -before $itk_component(text) \ |
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| 446 | -side left -fill y |
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| 447 | } |
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| 448 | } |
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| 449 | |
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| 450 | # ---------------------------------------------------------------------- |
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| 451 | # CONFIGURATION OPTION: -outline |
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| 452 | # ---------------------------------------------------------------------- |
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| 453 | itcl::configbody Rappture::Tooltip::outline { |
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| 454 | component hull configure -background $itk_option(-outline) |
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| 455 | } |
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| 456 | |
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| 457 | # ---------------------------------------------------------------------- |
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| 458 | # CONFIGURATION OPTION: -log |
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| 459 | # ---------------------------------------------------------------------- |
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| 460 | itcl::configbody Rappture::Tooltip::log { |
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| 461 | # logging options changed -- reset showing time |
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| 462 | set _showing 0 |
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| 463 | } |
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| 464 | |
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| 465 | # create a tooltip widget to show tool tips |
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| 466 | Rappture::Tooltip .rappturetooltip |
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| 467 | |
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| 468 | # any click on any widget takes down the tooltip |
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| 469 | bind all <Leave> [list ::Rappture::Tooltip::tooltip cancel] |
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| 470 | bind all <ButtonPress> [list ::Rappture::Tooltip::tooltip cancel] |
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| 471 | |
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| 472 | # create a tooltip widget to show error cues |
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| 473 | Rappture::Tooltip .rappturetoolcue \ |
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| 474 | -icon [Rappture::icon cue24] \ |
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| 475 | -background black -outline #333333 -foreground white |
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| 476 | |
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| 477 | # when cue is up, it has a grab, and any click brings it down |
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| 478 | bind .rappturetoolcue <ButtonPress> [list ::Rappture::Tooltip::cue hide] |
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