This code is used to highlight text in a Tk::Text window. This is useful in the context of highlighting some kind of tags, but could be used for any text. By changing a value, you can turn the text highlighting on and off.
Usage (from Tk widget "-command" option):
[\&toggleTextHighlighting \$highlight, \$regex, \$widget]
Where $highlight equals 1 or 2 (highlighting on or off), $regex is the regular expression used to highlight the text, and $widget is a reference to a Text widget.
sub toggleTextHighlighting {
my ($highlight, $regex, $widget) = @_;
# Deference the variables that you need to get values from
$highlight = ${$highlight};
$regex = ${$regex};
$widget = ${$widget};
# Create a tag to configure the text
$widget->tagConfigure('foundtag',
-foreground => "white",
-background => "red");
if ($highlight == 1) {
$widget->FindAll(-regex, -nocase, $regex);
if ($widget->tagRanges('sel')) {
my %startfinish = $widget->tagRanges('sel');
foreach(sort keys %startfinish) {
$widget->tagAdd("foundtag", $_, $startfinish{$_});
}
$widget->tagRemove('sel', '1.0', 'end');
}
} else {
$widget->tagRemove("foundtag", '1.0', 'end');
}
}
