2 # the next line restarts using wish \
6 # This script implements a simple color editor, where you can
7 # create colors using either the RGB, HSB, or CYM color spaces
8 # and apply the color to existing applications.
10 # RCS: @(#) $Id: tcolor,v 1.6 2007/12/13 15:27:07 dgp Exp $
12 package require Tk
8.4
13 wm title .
"Color Editor"
15 # Global variables that control the program:
17 # colorSpace - Color space currently being used for
18 # editing. Must be "rgb", "cmy", or "hsb".
19 # label1, label2, label3 - Labels for the scales.
20 # red, green, blue - Current color intensities in decimal
21 # on a scale of 0-65535.
22 # color - A string giving the current color value
23 # in the proper form for x:
25 # updating - Non-zero means that we're in the middle of
26 # updating the scales to load a new color,so
27 # information shouldn't be propagating back
28 # from the scales to other elements of the
29 # program: this would make an infinite loop.
30 # command - Holds the command that has been typed
31 # into the "Command" entry.
32 # autoUpdate - 1 means execute the update command
33 # automatically whenever the color changes.
34 # name - Name for new color, typed into entry.
40 set color
#ffff00000000
45 # Create the menu bar at the top of the window.
47 . configure
-menu [menu .menu
]
49 .menu add cascade
-menu .menu.
file -label File
-underline 0
50 .menu.
file add radio
-label "RGB color space" -variable colorSpace \
51 -value rgb
-underline 0 -command {changeColorSpace rgb
}
52 .menu.
file add radio
-label "CMY color space" -variable colorSpace \
53 -value cmy
-underline 0 -command {changeColorSpace cmy
}
54 .menu.
file add radio
-label "HSB color space" -variable colorSpace \
55 -value hsb
-underline 0 -command {changeColorSpace hsb
}
56 .menu.
file add separator
57 .menu.
file add radio
-label "Automatic updates" -variable autoUpdate \
59 .menu.
file add radio
-label "Manual updates" -variable autoUpdate \
61 .menu.
file add separator
62 .menu.
file add
command -label "Exit program" -underline 0 -command {exit}
64 # Create the command entry window at the bottom of the window, along
65 # with the update button.
67 labelframe .
command -text "Command:" -padx {1m
0}
68 entry .
command.e
-textvariable command
69 button .
command.update
-text Update
-command doUpdate
70 pack .
command.update
-side right
-pady .1c
-padx {.25c
0}
71 pack .
command.e
-expand yes -fill x
-ipadx 0.25c
74 # Create the listbox that holds all of the color names in rgb.txt,
75 # if an rgb.txt file can be found.
77 grid .
command -sticky nsew
-row 2 -columnspan 3 -padx 1m
-pady {0 1m
}
79 grid columnconfigure .
{1 2} -weight 1
80 grid rowconfigure .
0 -weight 1
82 /usr
/local
/lib
/X11
/rgb.txt
/usr
/lib
/X11
/rgb.txt
83 /X11
/R
5/lib
/X11
/rgb.txt
/X11
/R
4/lib
/rgb
/rgb.txt
84 /usr
/openwin
/lib
/X11
/rgb.txt
86 if {![file readable
$i]} {
90 labelframe .names
-text "Select:" -padx .1c
-pady .1c
91 grid .names
-row 0 -column 0 -sticky nsew
-padx .15c
-pady .15c
-rowspan 2
92 grid columnconfigure .
0 -weight 1
93 listbox .names.lb
-width 20 -height 12 -yscrollcommand ".names.s set" \
94 -exportselection false
95 bind .names.lb
<Double-1
> {
96 tc_loadNamedColor
[.names.lb get
[.names.lb curselection
]]
98 scrollbar .names.s
-orient vertical
-command ".names.lb yview"
99 pack .names.lb .names.s
-side left
-fill y
-expand 1
100 while {[gets
$f line
] >= 0} {
101 if {[regexp
{^\s
*\d
+\s
+\d
+\s
+\d
+\s
+(\S
+)$
} $line -> col]} {
102 .names.lb insert end
$col
109 # Create the three scales for editing the color, and the entry for
110 # typing in a color value.
114 label .adjust.l
$i -textvariable label
$i -pady 0
115 labelframe .adjust.
$i -labelwidget .adjust.l
$i -padx 1m
-pady 1m
116 scale .scale
$i -from 0 -to 1000 -length 6c
-orient horizontal \
117 -command tc_scaleChanged
118 pack .scale
$i -in .adjust.
$i
121 grid .adjust
-row 0 -column 1 -sticky nsew
-padx .15c
-pady .15c
123 labelframe .name
-text "Name:" -padx 1m
-pady 1m
124 entry .name.e
-textvariable name
-width 10
125 pack .name.e
-side right
-expand 1 -fill x
126 bind .name.e
<Return
> {tc_loadNamedColor
$name}
127 grid .name
-column 1 -row 1 -sticky nsew
-padx .15c
-pady .15c
129 # Create the color display swatch on the right side of the window.
131 labelframe .sample
-text "Color:" -padx 1m
-pady 1m
132 frame .sample.swatch
-width 2c
-height 5c
-background $color
133 label .sample.value
-textvariable color
-width 13 -font {Courier
12}
134 pack .sample.swatch
-side top
-expand yes -fill both
135 pack .sample.value
-side bottom
-pady .25c
136 grid .sample
-row 0 -column 2 -sticky nsew
-padx .15c
-pady .15c
-rowspan 2
139 # The procedure below is invoked when one of the scales is adjusted.
140 # It propagates color information from the current scale readings
141 # to everywhere else that it is used.
143 proc tc_scaleChanged args
{
144 global red green blue colorSpace color updating autoUpdate
150 set red
[format
%.0f
[expr {[.scale1 get
]*65.535}]]
151 set green
[format
%.0f
[expr {[.scale2 get
]*65.535}]]
152 set blue
[format
%.0f
[expr {[.scale3 get
]*65.535}]]
155 set red
[format
%.0f
[expr {65535 - [.scale1 get
]*65.535}]]
156 set green
[format
%.0f
[expr {65535 - [.scale2 get
]*65.535}]]
157 set blue
[format
%.0f
[expr {65535 - [.scale3 get
]*65.535}]]
160 set list
[hsbToRgb
[expr {[.scale1 get
]/1000.0}] \
161 [expr {[.scale2 get
]/1000.0}] \
162 [expr {[.scale3 get
]/1000.0}]]
163 set red
[lindex
$list 0]
164 set green
[lindex
$list 1]
165 set blue
[lindex
$list 2]
168 set color
[format
"#%04x%04x%04x" $red $green $blue]
169 .sample.swatch config
-bg $color
170 if {$autoUpdate} doUpdate
174 # The procedure below is invoked to update the scales from the
175 # current red, green, and blue intensities. It's invoked after
176 # a change in the color space and after a named color value has
179 proc tc_setScales
{} {
180 global red green blue colorSpace updating
184 .scale1
set [format
%.0f
[expr {$red/65.535}]]
185 .scale2
set [format
%.0f
[expr {$green/65.535}]]
186 .scale3
set [format
%.0f
[expr {$blue/65.535}]]
189 .scale1
set [format
%.0f
[expr {(65535-$red)/65.535}]]
190 .scale2
set [format
%.0f
[expr {(65535-$green)/65.535}]]
191 .scale3
set [format
%.0f
[expr {(65535-$blue)/65.535}]]
194 set list
[rgbToHsv
$red $green $blue]
195 .scale1
set [format
%.0f
[expr {[lindex
$list 0] * 1000.0}]]
196 .scale2
set [format
%.0f
[expr {[lindex
$list 1] * 1000.0}]]
197 .scale3
set [format
%.0f
[expr {[lindex
$list 2] * 1000.0}]]
203 # The procedure below is invoked when a named color has been
204 # selected from the listbox or typed into the entry. It loads
205 # the color into the editor.
207 proc tc_loadNamedColor name
{
208 global red green blue color autoUpdate
210 if {[string index
$name 0] != "#"} {
211 set list
[winfo rgb .sample.swatch
$name]
212 set red
[lindex
$list 0]
213 set green
[lindex
$list 1]
214 set blue
[lindex
$list 2]
216 switch
[string length
$name] {
217 4 {set format
"#%1x%1x%1x"; set shift 12}
218 7 {set format
"#%2x%2x%2x"; set shift 8}
219 10 {set format
"#%3x%3x%3x"; set shift 4}
220 13 {set format
"#%4x%4x%4x"; set shift 0}
221 default
{error
"syntax error in color name \"$name\""}
223 if {[scan
$name $format red green blue
] != 3} {
224 error
"syntax error in color name \"$name\""
226 set red
[expr {$red<<$shift}]
227 set green
[expr {$green<<$shift}]
228 set blue
[expr {$blue<<$shift}]
231 set color
[format
"#%04x%04x%04x" $red $green $blue]
232 .sample.swatch config
-bg $color
233 if {$autoUpdate} doUpdate
236 # The procedure below is invoked when a new color space is selected.
237 # It changes the labels on the scales and re-loads the scales with
238 # the appropriate values for the current color in the new color space
240 proc changeColorSpace space
{
241 global label1 label2 label3
244 set label1
"Adjust Red:"
245 set label2
"Adjust Green:"
246 set label3
"Adjust Blue:"
251 set label1
"Adjust Cyan:"
252 set label2
"Adjust Magenta:"
253 set label3
"Adjust Yellow:"
258 set label1
"Adjust Hue:"
259 set label2
"Adjust Saturation:"
260 set label3
"Adjust Brightness:"
267 # The procedure below converts an RGB value to HSB. It takes red, green,
268 # and blue components (0-65535) as arguments, and returns a list containing
269 # HSB components (floating-point, 0-1) as result. The code here is a copy
270 # of the code on page 615 of "Fundamentals of Interactive Computer Graphics"
271 # by Foley and Van Dam.
273 proc rgbToHsv
{red green blue
} {
275 set max
[expr {double
($red)}]
276 set min
[expr {double
($green)}]
278 set max
[expr {double
($green)}]
279 set min
[expr {double
($red)}]
282 set max
[expr {double
($blue)}]
283 } elseif
{$blue < $min} {
284 set min
[expr {double
($blue)}]
286 set range
[expr {$max-$min}]
290 set sat
[expr {($max-$min)/$max}]
295 set rc
[expr {($max - $red)/$range}]
296 set gc
[expr {($max - $green)/$range}]
297 set bc [expr {($max - $blue)/$range}]
299 set hue
[expr {($bc - $gc)/6.0}]
300 } elseif
{$green == $max} {
301 set hue
[expr {(2 + $rc - $bc)/6.0}]
303 set hue
[expr {(4 + $gc - $rc)/6.0}]
306 set hue
[expr {$hue + 1.0}]
309 return [list
$hue $sat [expr {$max/65535}]]
312 # The procedure below converts an HSB value to RGB. It takes hue, saturation,
313 # and value components (floating-point, 0-1.0) as arguments, and returns a
314 # list containing RGB components (integers, 0-65535) as result. The code
315 # here is a copy of the code on page 616 of "Fundamentals of Interactive
316 # Computer Graphics" by Foley and Van Dam.
318 proc hsbToRgb
{hue sat value
} {
319 set v
[format
%.0f
[expr {65535.0*$value}]]
323 set hue
[expr {$hue*6.0}]
328 set f
[expr {$hue-$i}]
329 set p
[format
%.0f
[expr {65535.0*$value*(1 - $sat)}]]
330 set q
[format
%.0f
[expr {65535.0*$value*(1 - ($sat*$f))}]]
331 set t
[format
%.0f
[expr {65535.0*$value*(1 - ($sat*(1 - $f)))}]]
333 0 {return "$v $t $p"}
334 1 {return "$q $v $p"}
335 2 {return "$p $v $t"}
336 3 {return "$p $q $v"}
337 4 {return "$t $p $v"}
338 5 {return "$v $p $q"}
339 default
{error
"i value $i is out of range"}
344 # The procedure below is invoked when the "Update" button is pressed,
345 # and whenever the color changes if update mode is enabled. It
346 # propagates color information as determined by the command in the
352 regsub
-all %% $command $color newCmd