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-rw-r--r--examples/colorpicker.tcl281
1 files changed, 281 insertions, 0 deletions
diff --git a/examples/colorpicker.tcl b/examples/colorpicker.tcl
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@@ -0,0 +1,281 @@
+if {[info exists ::colorpicker::version]} {return}
+namespace eval ::colorpicker {
+ namespace export colorpicker
+ # =========================================
+ # colorpicker
+ set version 0.1
+ # (C) 2009 - Federico Ferri
+ # mescalinum (at) gmail (dot) com
+ #
+ # Released under GPL-3 license:
+ # http://www.gnu.org/licenses/gpl-3.0.html
+ # =========================================
+ package provide colorpicker $version
+
+ variable presets {
+ ffffff dfdfdf bbbbbb ffc7c6 ffe3c6
+ feffc6 c6ffc7 c6feff c7c6ff e3c6ff
+ 9f9f9f 7c7c7c 606060 ff0400 ff8300
+ faff00 00ff04 00faff 0400ff 9c00ff
+ 404040 202020 000000 551312 553512
+ 535512 0f4710 0e4345 131255 2f004d
+ }
+
+ proc colorpicker {w mode args} {
+ variable {}
+ set modes {switches hsv}
+ if {[lsearch -exact $modes $mode] == -1} {
+ error "bad mode: $mode. must be one of: $modes."
+ }
+ set ($w:mode) $mode
+ set ($w:color) "#000000"
+ set ($w:command) {}
+ set ($w:textvar) {}
+ frame $w
+ init_$mode $w
+ rename $w ::colorpicker::_$w
+ interp alias {} $w {} ::colorpicker::dispatch $w
+ if {$args != {}} {uplevel 1 ::colorpicker::config $w $args}
+ return $w
+ }
+
+ proc dispatch {w cmd args} {
+ variable {}
+ switch -glob -- $cmd {
+ get {set ($w:color)}
+ set {uplevel 1 [linsert $args 0 ::colorpicker::set_color_ext $w]}
+ con* {uplevel 1 [linsert $args 0 ::colorpicker::config $w]}
+ default {uplevel 1 [linsert $args 0 ::colorpicker::_$w $cmd]}
+ }
+ }
+
+ proc config {w args} {
+ variable {}
+ set options {}
+ set flag 0
+ foreach {key value} $args {
+ switch -glob -- $key {
+ -com* {
+ set ($w:command) $value
+ set flag 1
+ }
+ -textvar* {
+ set ($w:textvar) $value
+ set flag 1
+ }
+ default { lappend options $key $value }
+ }
+ }
+ if {!$flag || $options != ""} {
+ uplevel 1 [linsert $options 0 ::scrolledframe::_$w config]
+ }
+ }
+
+ proc set_color_ext {w c} {
+ # called by the widget public method
+ variable {}
+ set c [string tolower $c]
+ if {![regexp {^#[0-9a-f]{6,6}$} $c]} {
+ error "Invalid color: $c. Specify a color in the format #HHHHHH"
+ }
+ switch -exact -- $($w:mode) {
+ switches {
+ set_color $w $c
+ }
+ hsv {
+ set r [expr 0x[string range $c 1 2]]
+ set g [expr 0x[string range $c 3 4]]
+ set b [expr 0x[string range $c 5 6]]
+ set hsv [rgbToHsv $r $g $b]
+ hsv_set $w h [lindex $hsv 0]
+ hsv_set $w s [lindex $hsv 1]
+ hsv_set $w v [lindex $hsv 2]
+ set_color $w $c
+ }
+ }
+ }
+
+ proc set_color {w c} {
+ # called internally in reaction to events
+ variable {}
+ set c [string tolower $c]
+ set ($w:color) $c
+ if {$($w:command) != {}} {
+ set cmd $($w:command)
+ lappend cmd $c
+ uplevel #0 $cmd
+ }
+ if {$($w:textvar) != {}} {
+ uplevel #0 [list set $($w:textvar) $c]
+ }
+ switch -exact -- $($w:mode) {
+ switches {
+ variable presets
+ set q 0
+ for {set row 0} {$row < 3} {incr row} {
+ for {set col 0} {$col < 10} {incr col} {
+ set b [expr {$c == "#[lindex $presets $q]"}]
+ ${w}.r${row}c${col} configure \
+ -relief [lindex {raised sunken} $b]
+ incr q
+ }
+ }
+ }
+ hsv {
+ }
+ }
+ }
+
+ proc mkColor {rgb} {
+ set r [lindex $rgb 0]; set g [lindex $rgb 1]; set b [lindex $rgb 2]
+ if {$r < 0} {set r 0} elseif {$r > 255} {set r 255}
+ if {$g < 0} {set g 0} elseif {$g > 255} {set g 255}
+ if {$b < 0} {set b 0} elseif {$b > 255} {set b 255}
+ return #[format "%2.2x%2.2x%2.2x" $r $g $b]
+ }
+
+ proc rgbToHsv {r g b} {
+ set sorted [lsort -real [list $r $g $b]]
+ set temp [lindex $sorted 0]
+ set v [lindex $sorted 2]
+ set value $v
+ set bottom [expr {$v-$temp}]
+ if {$bottom == 0} {
+ set hue 0
+ set saturation 0
+ set value $v
+ } else {
+ if {$v == $r} {
+ set top [expr {$g-$b}]
+ if {$g >= $b} {
+ set angle 0
+ } else {
+ set angle 360
+ }
+ } elseif {$v == $g} {
+ set top [expr {$b-$r}]
+ set angle 120
+ } elseif {$v == $b} {
+ set top [expr {$r-$g}]
+ set angle 240
+ }
+ set hue [expr {round(60*(double($top)/$bottom)+$angle)}]
+ }
+ if {$v == 0} {
+ set saturation 0
+ } else {
+ set saturation [expr {round(255-255*(double($temp)/$v))}]
+ }
+ return [list $hue $saturation $value]
+ }
+
+ proc hsvToRgb {h s v} {
+ set hi [expr {int(double($h)/60)%6}]
+ set f [expr {double($h)/60-$hi}]
+ set s [expr {double($s)/255}]
+ set v [expr {double($v)/255}]
+ set p [expr {double($v)*(1-$s)}]
+ set q [expr {double($v)*(1-$f*$s)}]
+ set t [expr {double($v)*(1-(1-$f)*$s)}]
+ switch -- $hi {
+ 0 {set r $v; set g $t; set b $p}
+ 1 {set r $q; set g $v; set b $p}
+ 2 {set r $p; set g $v; set b $t}
+ 3 {set r $p; set g $q; set b $v}
+ 4 {set r $t; set g $p; set b $v}
+ 5 {set r $v; set g $p; set b $q}
+ default {error "[lindex [info level 0] 0]: bad H value"}
+ }
+ set r [expr {round($r*255)}]
+ set g [expr {round($g*255)}]
+ set b [expr {round($b*255)}]
+ return [list $r $g $b]
+ }
+
+ proc init_switches {w} {
+ variable {}
+ variable presets
+ set q 0
+ for {set row 0} {$row < 3} {incr row} {
+ for {set col 0} {$col < 10} {incr col} {
+ set c "#[lindex $presets $q]"
+ set b [expr {$($w:color) == $c}]
+ grid [frame ${w}.r${row}c${col} -width 18 -height 16 \
+ -borderwidth 1 -relief [lindex {raised sunken} $b] \
+ -background $c -highlightthickness 0] \
+ -row $row -column $col
+ bind ${w}.r${row}c${col} <ButtonPress-1> \
+ "[namespace current]::set_color $w $c"
+ incr q
+ }
+ }
+ }
+
+ proc init_hsv {w} {
+ variable colorhsv
+ set colorhsv($w:h) 0
+ set colorhsv($w:s) 255
+ set colorhsv($w:v) 255
+ grid [canvas ${w}.hue -width 130 -height 15 -borderwidth 1 \
+ -relief sunken -highlightthickness 0] -column 0 -row 0
+ grid [canvas ${w}.sat -width 130 -height 14 -borderwidth 1 \
+ -relief sunken -highlightthickness 0] -column 0 -row 1
+ grid [canvas ${w}.val -width 130 -height 14 -borderwidth 1 \
+ -relief sunken -highlightthickness 0] -column 0 -row 2
+ grid [canvas ${w}.test -width 46 -height 46 -borderwidth 1 \
+ -relief sunken -highlightthickness 0 -background red] \
+ -column 1 -row 0 -rowspan 3
+ variable mh
+ variable ms
+ variable mv
+ set mh($w) 0; set ms($w) 0; set mv($w) 0;
+ set sh "[namespace current]::hsv_set $w h \[expr {%x*360.0/130.0}\]"
+ set ss "[namespace current]::hsv_set $w s \[expr {%x*255.0/130.0}\]"
+ set sv "[namespace current]::hsv_set $w v \[expr {%x*255.0/130.0}\]"
+ bind ${w}.hue <ButtonPress-1> "set [namespace current]::mh($w) 1; $sh"
+ bind ${w}.sat <ButtonPress-1> "set [namespace current]::ms($w) 1; $ss"
+ bind ${w}.val <ButtonPress-1> "set [namespace current]::mv($w) 1; $sv"
+ bind ${w}.hue <ButtonRelease-1> "set [namespace current]::mh($w) 0"
+ bind ${w}.sat <ButtonRelease-1> "set [namespace current]::ms($w) 0"
+ bind ${w}.val <ButtonRelease-1> "set [namespace current]::mv($w) 0"
+ bind ${w}.hue <Motion> "if {\$[namespace current]::mh($w)} {$sh}"
+ bind ${w}.sat <Motion> "if {\$[namespace current]::ms($w)} {$ss}"
+ bind ${w}.val <Motion> "if {\$[namespace current]::mv($w)} {$sv}"
+ for {set x 0} {$x < 130} {incr x 3} {
+ set c [mkColor [hsvToRgb [expr {$x*360.0/130.0}] 255 255]]
+ ${w}.hue create rectangle $x 0 [expr {4+$x}] 16 -fill $c -outline {}
+ }
+ hsv_regen $w $colorhsv($w:h)
+ }
+
+ proc hsv_regen {w hue} {
+ ${w}.sat delete all
+ ${w}.val delete all
+ for {set x 0} {$x < 130} {incr x 3} {
+ set x1 [expr {$x*255.0/130.0}]
+ set c1 [mkColor [hsvToRgb $hue $x1 255]]
+ set c2 [mkColor [hsvToRgb $hue 255 $x1]]
+ ${w}.sat create rectangle $x 0 [expr {4+$x}] 16 \
+ -fill $c1 -outline {}
+ ${w}.val create rectangle $x 0 [expr {4+$x}] 16 \
+ -fill $c2 -outline {}
+ }
+ }
+
+ proc hsv_set {w what val} {
+ variable colorhsv
+ if {$what != {h} && $what != {s} && $what != {v}} {return}
+ set colorhsv($w:$what) $val
+ if {$colorhsv($w:$what) < 0.0} {set colorhsv($w:$what) 0}
+ if {$what == {h}} {
+ if {$colorhsv($w:$what) >= 360.0} {set colorhsv($w:$what) 0}
+ hsv_regen $w $colorhsv($w:$what)
+ } else {
+ if {$colorhsv($w:$what) > 255.0} {set colorhsv($w:$what) 255}
+ }
+ set c [mkColor [hsvToRgb \
+ $colorhsv($w:h) $colorhsv($w:s) $colorhsv($w:v)]]
+ ${w}.test configure -background $c
+ set_color $w $c
+ }
+}
generated by cgit v1.2.1 (git 2.18.0) at 2025-02-22 17:13:58 +0000