3 # This file contains procedures that change the color palette used
6 # RCS: @(#) $Id: palette.tcl,v 1.8.2.2 2006/03/17 10:50:11 patthoyts Exp $
8 # Copyright (c) 1995-1997 Sun Microsystems, Inc.
10 # See the file "license.terms" for information on usage and redistribution
11 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
15 # Changes the default color scheme for a Tk application by setting
16 # default colors in the option database and by modifying all of the
17 # color options for existing widgets that have the default value.
20 # The arguments consist of either a single color name, which
21 # will be used as the new background color (all other colors will
22 # be computed from this) or an even number of values consisting of
23 # option names and values. The name for an option is the one used
24 # for the option database, such as activeForeground, not -activeforeground.
26 proc ::tk_setPalette {args
} {
27 if {[winfo depth .
] == 1} {
28 # Just return on monochrome displays, otherwise errors will occur
32 # Create an array that has the complete new palette. If some colors
33 # aren't specified, compute them from other colors that are specified.
35 if {[llength $args] == 1} {
36 set new
(background
) [lindex $args 0]
40 if {![info exists new
(background
)]} {
41 error "must specify a background color"
43 set bg
[winfo rgb .
$new(background
)]
44 if {![info exists new
(foreground
)]} {
45 # Note that the range of each value in the triple returned by
46 # [winfo rgb] is 0-65535, and your eyes are more sensitive to
47 # green than to red, and more to red than to blue.
48 foreach {r g b
} $bg {break}
49 if {$r+1.5*$g+0.5*$b > 100000} {
50 set new
(foreground
) black
52 set new
(foreground
) white
56 # To avoir too many lindex...
57 foreach {fg_r fg_g fg_b
} [winfo rgb .
$new(foreground
)] {break}
58 foreach {bg_r bg_g bg_b
} $bg {break}
60 set darkerBg
[format #%02x%02x%02x [expr {(9*$bg_r)/2560}] \
61 [expr {(9*$bg_g)/2560}] [expr {(9*$bg_b)/2560}]]
62 foreach i
{activeForeground insertBackground selectForeground
\
64 if {![info exists new
($i)]} {
65 set new
($i) $new(foreground
)
68 if {![info exists new
(disabledForeground
)]} {
69 set new
(disabledForeground
) [format #%02x%02x%02x \
70 [expr {(3*$bg_r + $fg_r)/1024}] \
71 [expr {(3*$bg_g + $fg_g)/1024}] \
72 [expr {(3*$bg_b + $fg_b)/1024}]]
74 if {![info exists new
(highlightBackground
)]} {
75 set new
(highlightBackground
) $new(background
)
77 if {![info exists new
(activeBackground
)]} {
78 # Pick a default active background that islighter than the
79 # normal background. To do this, round each color component
80 # up by 15% or 1/3 of the way to full white, whichever is
83 foreach i
{0 1 2} color
"$bg_r $bg_g $bg_b" {
84 set light
($i) [expr {$color/256}]
85 set inc1
[expr {($light($i)*15)/100}]
86 set inc2
[expr {(255-$light($i))/3}]
92 if {$light($i) > 255} {
96 set new
(activeBackground
) [format #%02x%02x%02x $light(0) \
99 if {![info exists new
(selectBackground
)]} {
100 set new
(selectBackground
) $darkerBg
102 if {![info exists new
(troughColor
)]} {
103 set new
(troughColor
) $darkerBg
105 if {![info exists new
(selectColor
)]} {
106 set new
(selectColor
) #b03060
109 # let's make one of each of the widgets so we know what the
110 # defaults are currently for this platform.
111 toplevel .___tk_set_palette
112 wm withdraw .___tk_set_palette
114 button canvas checkbutton entry frame label labelframe
115 listbox menubutton menu message radiobutton scale scrollbar
118 $q .___tk_set_palette.
$q
121 # Walk the widget hierarchy, recoloring all existing windows.
122 # The option database must be set according to what we do here,
123 # but it breaks things if we set things in the database while
124 # we are changing colors...so, ::tk::RecolorTree now returns the
125 # option database changes that need to be made, and they
126 # need to be evalled here to take effect.
127 # We have to walk the whole widget tree instead of just
128 # relying on the widgets we've created above to do the work
129 # because different extensions may provide other kinds
130 # of widgets that we don't currently know about, so we'll
131 # walk the whole hierarchy just in case.
133 eval [tk::RecolorTree . new
]
135 destroy .___tk_set_palette
137 # Change the option database so that future windows will get the
140 foreach option [array names new
] {
141 option add
*$option $new($option) widgetDefault
144 # Save the options in the variable ::tk::Palette, for use the
145 # next time we change the options.
147 array set ::tk::Palette [array get new
]
150 # ::tk::RecolorTree --
151 # This procedure changes the colors in a window and all of its
152 # descendants, according to information provided by the colors
153 # argument. This looks at the defaults provided by the option
154 # database, if it exists, and if not, then it looks at the default
155 # value of the widget itself.
158 # w - The name of a window. This window and all its
159 # descendants are recolored.
160 # colors - The name of an array variable in the caller,
161 # which contains color information. Each element
162 # is named after a widget configuration option, and
163 # each value is the value for that option.
165 proc ::tk::RecolorTree {w
colors} {
168 set prototype .___tk_set_palette.
[string tolower
[winfo class
$w]]
169 if {![winfo exists
$prototype]} {
172 foreach dbOption
[array names c
] {
173 set option -[string tolower
$dbOption]
174 set class
[string replace
$dbOption 0 0 [string toupper
\
175 [string index
$dbOption 0]]]
176 if {![catch {$w configure
$option} value
]} {
177 # if the option database has a preference for this
178 # dbOption, then use it, otherwise use the defaults
180 set defaultcolor
[option get
$w $dbOption $class]
181 if {[string match
{} $defaultcolor] ||
\
182 ([info exists prototype
] && \
183 [$prototype cget
$option] ne
"$defaultcolor")} {
184 set defaultcolor
[winfo rgb .
[lindex $value 3]]
186 set defaultcolor
[winfo rgb .
$defaultcolor]
188 set chosencolor
[winfo rgb .
[lindex $value 4]]
189 if {[string match
$defaultcolor $chosencolor]} {
190 # Change the option database so that future windows will get
192 append result
";\noption add [list \
193 *[winfo class $w].$dbOption $c($dbOption) 60]"
194 $w configure
$option $c($dbOption)
198 foreach child
[winfo children
$w] {
199 append result
";\n[::tk::RecolorTree $child c]"
205 # Given a color name, computes a new color value that darkens (or
206 # brightens) the given color by a given percent.
209 # color - Name of starting color.
210 # perecent - Integer telling how much to brighten or darken as a
211 # percent: 50 means darken by 50%, 110 means brighten
214 proc ::tk::Darken {color percent
} {
215 foreach {red green blue
} [winfo rgb .
$color] {
216 set red
[expr {($red/256)*$percent/100}]
217 set green
[expr {($green/256)*$percent/100}]
218 set blue
[expr {($blue/256)*$percent/100}]
230 return [format "#%02x%02x%02x" $red $green $blue]
234 # Reset the Tk color palette to the old "bisque" colors.
239 proc ::tk_bisque {} {
240 tk_setPalette activeBackground
#e6ceb1 activeForeground black \
241 background
#ffe4c4 disabledForeground #b0b0b0 foreground black \
242 highlightBackground
#ffe4c4 highlightColor black \
243 insertBackground black selectColor
#b03060 \
244 selectBackground
#e6ceb1 selectForeground black \