comment on

I see. So the info that Tcl::Ev() should come first can be found as example in http://search.cpan.org/grep?cpanid=VKON&release=Tcl-Tk-1.04&string=bind&i=1&n=1&C=9, https://metacpan.org/source/VKON/Tcl-Tk-1.04/tk-demos/widget

$T->tagBind(qw/demo <Motion>/ => [sub {
    my($x, $y) = (shift,shift);
    my($text, $sv) = @_;
    #my $e = $text->XEvent;
    #my($x, $y) = ($e->x, $e->y);
    my $new_line = $text->index("\@$x,$y linestart");
    if ($new_line ne $last_line) {
        $text->tagRemove(qw/hot 1.0 end/);
        $last_line = $new_line;
        $text->tagAdd('hot', $last_line, "$last_line lineend");
    }
    show_stat $sv, $text, $text->index('current');
    }, Tcl::Ev('%x','%y'), \$STATUS_VAR]
);
[download]

It is also documented in Tcl

4. As a special case, there is a mechanism to deal with Tk's special event variables (they are mentioned as '%x', '%y' and so on throughout Tcl). When creating a subroutine reference that uses such variables, you must declare the desired variables using Tcl::Ev as the first argument to the subroutine.

In reply to Re^3: Tcl/Tk mouse events by Anonymous Monk
in thread Tcl/Tk mouse events by Sandy

Are you posting in the right place? Check out Where do I post X? to know for sure.
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
Want more info? How to link or How to display code and escape characters are good places to start.


Perl Monk, Perl Meditation
	PerlMonks