diff options
Diffstat (limited to 'Master/tlpkg/tlperl/lib/Tk/ColorSelect.pm')
-rwxr-xr-x | Master/tlpkg/tlperl/lib/Tk/ColorSelect.pm | 414 |
1 files changed, 414 insertions, 0 deletions
diff --git a/Master/tlpkg/tlperl/lib/Tk/ColorSelect.pm b/Master/tlpkg/tlperl/lib/Tk/ColorSelect.pm new file mode 100755 index 00000000000..385213e4363 --- /dev/null +++ b/Master/tlpkg/tlperl/lib/Tk/ColorSelect.pm @@ -0,0 +1,414 @@ +package Tk::ColorSelect; # XXX why is this the Tk::ColorSelect package? +use strict; + +use vars qw($VERSION); +$VERSION = '4.014'; + +use Tk qw(Ev); + +require Tk::Frame; + +use base qw(Tk::Frame); +Construct Tk::Widget 'ColorSelect'; + +sub Populate +{ + my ($middle,$args) = @_; + my($i, @a); + my %seen_names; + foreach $i ($middle->_rgbTxtPath) { + local *FOO; + next if ! open FOO, $i; + my $middle_left = $middle->Frame; + $middle_left->pack( + -side => 'left', + -padx => '0.25c', + -pady => '0.25c', + ); + my $names = $middle->Listbox( + -width => 20, + -height => 12, + -relief => 'sunken', + -borderwidth => 2, + -exportselection => 0, + ); + $middle->Advertise(Names => $names); + + $names->bind('<Double-1>' => [$middle,'color',Ev(['getSelected'])]); + + my $scroll = $middle->Scrollbar( + -orient => 'vertical', + -command => ['yview', $names], + -relief => 'sunken', + -borderwidth => 2, + ); + $names->configure(-yscrollcommand => ['set',$scroll]); + $names->pack(-in => $middle_left, -side => 'left'); + $scroll->pack(-in => $middle_left, -side => 'right', -fill => 'y'); + + while(<FOO>) { + chomp; + next if /^!/; + my @a = split; + my $color = join(' ', @a[3 .. $#a]); + my $hex; + eval { $hex = $middle->Hex($color); }; + if ($@) { + #print STDERR "unknown color: '$color'\n"; + if ($@ =~ /unknown color name "/) { + next; + } else { + chomp $@; + die $@; + } + } + if (!exists($seen_names{$hex}) || + length($seen_names{$hex}) > length($color)) { + $seen_names{$hex} = $color; + $names->insert('end', $color); + } + } + close FOO; + last; + } + + # Create the three scales for editing the color, and the entry for typing + # in a color value. + + my $middle_middle = $middle->Frame; + $middle_middle->pack(-side => 'left', -expand => 1, -fill => 'y'); + my $mcm1 = $middle_middle->Optionmenu(-variable => \$middle->{'color_space'}, + -command => [ $middle, 'color_space'], + -relief => 'raised', + -options => [ ['HSB color space' => 'hsb'], + ['RGB color space' => 'rgb'], + ['CMY color space' => 'cmy']]); + $mcm1->pack(-side => 'top', -fill => 'x'); + + my(@middle_middle, @label, @scale); + $middle_middle[0] = $middle_middle->Frame; + $middle_middle[1] = $middle_middle->Frame; + $middle_middle[2] = $middle_middle->Frame; + $middle_middle[3] = $middle_middle->Frame; + $middle_middle[0]->pack(-side => 'top', -expand => 1); + $middle_middle[1]->pack(-side => 'top', -expand => 1); + $middle_middle[2]->pack(-side => 'top', -expand => 1); + $middle_middle[3]->pack(-side => 'top', -expand => 1, -fill => 'x'); + $middle->{'Labels'} = ['zero','one','two']; + foreach $i (0..2) { + $label[$i] = $middle->Label(-textvariable => \$middle->{'Labels'}[$i]); + $scale[$i] = $middle->Scale( + -from => 0, + -to => 1000, + '-length' => '6c', + -orient => 'horizontal', + -command => [\&scale_changed, $middle], + ); + $scale[$i]->pack( + -in => $middle_middle[$i], + -side => 'top', + -anchor => 'w', + ); + $label[$i]->pack( + -in => $middle_middle[$i], + -side => 'top', + -anchor => 'w', + ); + } + my $nameLabel = $middle->Label(-text => 'Name:'); + $middle->{'Entry'} = ''; + my $name = $middle->Entry( + -relief => 'sunken', + -borderwidth => 2, + -textvariable => \$middle->{'Entry'}, + -width => 10, +# For some reason giving this font causes problems at end of t/create.t +# -font => '-*-Courier-Medium-R-Normal--*-120-*-*-*-*-*-*' + ); + + $nameLabel->pack(-in => $middle_middle[3], -side => 'left'); + $name->pack( + -in => $middle_middle[3], + -side => 'right', + -expand => 1, + -fill => 'x', + ); + $name->bind('<Return>' => [ $middle, 'color', Ev(['get'])]); + + # Create the color display swatch on the right side of the window. + + my $middle_right = $middle->Frame; + $middle_right->pack( + -side => 'left', + -pady => '.25c', + -padx => '.25c', + -anchor => 's', + ); + my $swatch = $middle->Canvas( + -width => '2.5c', + -height => '5c', + ); + my $swatch_item = $swatch->create('oval', '.5c', '.3c', '2.26c', '4.76c'); + + my $value = $middle->Label( + -textvariable => \$middle->{'color'}, + -width => 13, + -font => '-*-Courier-Medium-R-Normal--*-120-*-*-*-*-*-*' + ); + + $swatch->pack( + -in => $middle_right, + -side => 'top', + -expand => 1, + -fill => 'both', + ); + $value->pack(-in => $middle_right, -side => 'bottom', -pady => '.25c'); + + $middle->ConfigSpecs( + '-color_space' => ['METHOD', undef, undef, 'hsb'], + '-initialcolor' => '-color', + '-color' => ['METHOD', 'background', 'Background', + $middle->cget('-background')] + ); + + $middle->{'swatch'} = $swatch; + $middle->{'swatch_item'} = $swatch_item; + $middle->{'scale'} = [@scale]; + $middle->{'red'} = 0; + $middle->{'blue'} = 0; + $middle->{'green'} = 0; + +} + +sub _rgbTxtPath +{ + require Tk::Config; + my(@xlibpath) = map { s/^-L//; "$_/X11/rgb.txt" } + split /\s+/, $Tk::Config::xlib; + ( + @xlibpath, + '/usr/local/lib/X11/rgb.txt', + '/usr/lib/X11/rgb.txt', + '/usr/X11R6/lib/X11/rgb.txt', + '/usr/local/X11R5/lib/X11/rgb.txt', + '/X11/R5/lib/X11/rgb.txt', + '/X11/R4/lib/rgb/rgb.txt', + '/usr/openwin/lib/X11/rgb.txt', + '/usr/share/X11/rgb.txt', # This is the Debian location + '/usr/X11/share/X11/rgb.txt', # seen on a Mac OS X 10.5.1 system + '/usr/X11R6/share/X11/rgb.txt', # seen on a OpenBSD 4.2 system + '/etc/X11R6/rgb.txt', + '/etc/X11/rgb.txt', # seen on HP-UX 11.31 + ); +} + +sub Hex +{ + my $w = shift; + my @rgb = (@_ == 3) ? @_ : $w->rgb(@_); + sprintf('#%04x%04x%04x',@rgb) +} + +sub color_space { + + my($objref, $space) = @_; + + if (@_ > 1) + { + my %Labels = ( 'rgb' => [qw(Red Green Blue)], + 'cmy' => [qw(Cyan Magenta Yellow)], + 'hsb' => [qw(Hue Saturation Brightness)] ); + + # The procedure below is invoked when a new color space is selected. It + # changes the labels on the scales and re-loads the scales with the + # appropriate values for the current color in the new color space + + $space = 'hsb' unless (exists $Labels{$space}); + my $i; + for $i (0..2) + { + $objref->{'Labels'}[$i] = $Labels{$space}->[$i]; + } + $objref->{'color_space'} = $space; + $objref->afterIdle(['set_scales',$objref]) unless ($objref->{'pending'}++); + } + return $objref->{'color_space'}; +} # color_space + +sub hsvToRgb { + + # The procedure below converts an HSB value to RGB. It takes hue, + # saturation, and value components (floating-point, 0-1.0) as arguments, + # and returns a list containing RGB components (integers, 0-65535) as + # result. The code here is a copy of the code on page 616 of + # "Fundamentals of Interactive Computer Graphics" by Foley and Van Dam. + + my($hue, $sat, $value) = @_; + my($v, $i, $f, $p, $q, $t); + + $v = int(65535 * $value); + return ($v, $v, $v) if $sat == 0; + $hue *= 6; + $hue = 0 if $hue >= 6; + $i = int($hue); + $f = $hue - $i; + $p = int(65535 * $value * (1 - $sat)); + $q = int(65535 * $value * (1 - ($sat * $f))); + $t = int(65535 * $value * (1 - ($sat * (1 - $f)))); + return ($v, $t, $p) if $i == 0; + return ($q, $v, $p) if $i == 1; + return ($p, $v, $t) if $i == 2; + return ($p, $q, $v) if $i == 3; + return ($t, $p, $v) if $i == 4; + return ($v, $p, $q) if $i == 5; + +} # end hsvToRgb + +sub color +{ + my ($objref,$name) = @_; + if (@_ > 1 && defined($name) && length($name)) + { + if ($name eq 'cancel') { + $objref->{color} = undef; + return; + } + my ($format, $shift); + my ($red, $green, $blue); + + if ($name !~ /^#/) + { + ($red, $green, $blue) = $objref->{'swatch'}->rgb($name); + } + else + { + my $len = length $name; + if($len == 4) { $format = '#(.)(.)(.)'; $shift = 12; } + elsif($len == 7) { $format = '#(..)(..)(..)'; $shift = 8; } + elsif($len == 10) { $format = '#(...)(...)(...)'; $shift = 4; } + elsif($len == 13) { $format = '#(....)(....)(....)'; $shift = 0; } + else { + $objref->BackTrace( + "ColorEditor error: syntax error in color name \"$name\""); + return; + } + ($red,$green,$blue) = $name =~ /$format/; + # Looks like a call for 'pack' or similar rather than eval + eval "\$red = 0x$red; \$green = 0x$green; \$blue = 0x$blue;"; + $red = $red << $shift; + $green = $green << $shift; + $blue = $blue << $shift; + } + $objref->{'red'} = $red; + $objref->{'blue'} = $blue; + $objref->{'green'} = $green; + my $hex = sprintf('#%04x%04x%04x', $red, $green, $blue); + $objref->{'color'} = $hex; + $objref->{'Entry'} = $name; + $objref->afterIdle(['set_scales',$objref]) unless ($objref->{'pending'}++); + $objref->{'swatch'}->itemconfigure($objref->{'swatch_item'}, + -fill => $objref->{'color'}); + } + return $objref->{'color'}; +} + +sub rgbToHsv { + + # The procedure below converts an RGB value to HSB. It takes red, green, + # and blue components (0-65535) as arguments, and returns a list + # containing HSB components (floating-point, 0-1) as result. The code + # here is a copy of the code on page 615 of "Fundamentals of Interactive + # Computer Graphics" by Foley and Van Dam. + + my($red, $green, $blue) = @_; + my($max, $min, $sat, $range, $hue, $rc, $gc, $bc); + + $max = ($red > $green) ? (($blue > $red) ? $blue : $red) : + (($blue > $green) ? $blue : $green); + $min = ($red < $green) ? (($blue < $red) ? $blue : $red) : + (($blue < $green) ? $blue : $green); + $range = $max - $min; + if ($max == 0) { + $sat = 0; + } else { + $sat = $range / $max; + } + if ($sat == 0) { + $hue = 0; + } else { + $rc = ($max - $red) / $range; + $gc = ($max - $green) / $range; + $bc = ($max - $blue) / $range; + $hue = ($max == $red)?(0.166667*($bc - $gc)): + (($max == $green)?(0.166667*(2 + $rc - $bc)): + (0.166667*(4 + $gc - $rc))); + } + $hue += 1 if $hue < 0; + return ($hue, $sat, $max/65535); + +} # end rgbToHsv + +sub scale_changed { + + # The procedure below is invoked when one of the scales is adjusted. It + # propagates color information from the current scale readings to + # everywhere else that it is used. + + my($objref) = @_; + + return if $objref->{'updating'}; + my ($red, $green, $blue); + + if($objref->{'color_space'} eq 'rgb') { + $red = int($objref->{'scale'}->[0]->get * 65.535 + 0.5); + $green = int($objref->{'scale'}->[1]->get * 65.535 + 0.5); + $blue = int($objref->{'scale'}->[2]->get * 65.535 + 0.5); + } elsif($objref->{'color_space'} eq 'cmy') { + $red = int(65535 - $objref->{'scale'}->[0]->get * 65.535 + 0.5); + $green = int(65535 - $objref->{'scale'}->[1]->get * 65.535 + 0.5); + $blue = int(65535 - $objref->{'scale'}->[2]->get * 65.535 + 0.5); + } else { + ($red, $green, $blue) = hsvToRgb($objref->{'scale'}->[0]->get/1000.0, + $objref->{'scale'}->[1]->get/1000.0, + $objref->{'scale'}->[2]->get/1000.0); + } + $objref->{'red'} = $red; + $objref->{'blue'} = $blue; + $objref->{'green'} = $green; + $objref->color(sprintf('#%04x%04x%04x', $red, $green, $blue)); + $objref->idletasks; + +} # end scale_changed + +sub set_scales { + + my($objref) = @_; + $objref->{'pending'} = 0; + $objref->{'updating'} = 1; + + # The procedure below is invoked to update the scales from the current red, + # green, and blue intensities. It's invoked after a change in the color + # space and after a named color value has been loaded. + + my($red, $blue, $green) = ($objref->{'red'}, $objref->{'blue'}, + $objref->{'green'}); + + if($objref->{'color_space'} eq 'rgb') { + $objref->{'scale'}->[0]->set(int($red / 65.535 + 0.5)); + $objref->{'scale'}->[1]->set(int($green / 65.535 + 0.5)); + $objref->{'scale'}->[2]->set(int($blue / 65.535 + 0.5)); + } elsif($objref->{'color_space'} eq 'cmy') { + $objref->{'scale'}->[0]->set(int((65535 - $red) / 65.535 + 0.5)); + $objref->{'scale'}->[1]->set(int((65535 - $green) / 65.535 + 0.5)); + $objref->{'scale'}->[2]->set(int((65535 - $blue) / 65.535 + 0.5)); + } else { + my ($s1, $s2, $s3) = rgbToHsv($red, $green, $blue); + $objref->{'scale'}->[0]->set(int($s1 * 1000.0 + 0.5)); + $objref->{'scale'}->[1]->set(int($s2 * 1000.0 + 0.5)); + $objref->{'scale'}->[2]->set(int($s3 * 1000.0 + 0.5)); + } + $objref->{'updating'} = 0; + +} # end set_scales + +1; |