[Tcl-bugs] [ tktoolkit-Bugs-3055902 ] Control-a key binding for text widget is broke

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Bugs item #3055902, was opened at 2010-08-30 09:31
Message generated for change (Comment added) made by dkf
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Category: 18. [text]
Group: None
Status: Closed
Resolution: Invalid
Priority: 5
Private: No
Submitted By: Steven (stevenaaus)
Assigned to: Jeffrey Hobbs (hobbs)
Summary: Control-a key binding for text widget is broke

Initial Comment:
The <Control-a> binding for text widgets doesn't work properly with regards to the sel tag.
<Control-o> works fine. 

It seems to be related to newlines somehow, as even the Control-o binding (below) inserts extra newlines.
Tested on 8.4 and 8.5. Hope i'm not missing something...
-----------------
pack [text .t]
.t insert end {some text
and more}
bind .t <Control-a> {.t tag add sel 0.0 end-1c}
bind .t <Control-o> {.t tag add sel 0.0 end-1c}


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>Comment By: Donal K. Fellows (dkf)
Date: 2010-08-30 20:46

Message:
It's been documented to work that way forever. If you want to change it for
your own apps, modify the Text, Entry, Spinbox, TEntry and TSpinbox class
bindings for <Control-a>.

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Comment By: Alexandre Ferrieux (ferrieux)
Date: 2010-08-30 11:06

Message:
Just about anyone on your side of the universe :)
Ctrl-A means Home to Emacs and to the emacs mode popular in bash, ksh,
tcsh, and GNU readline().


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Comment By: Steven (stevenaaus)
Date: 2010-08-30 10:41

Message:
Ok... thanks :)
But imho that default binding should be changed, especially since it's
already bound to Home
and just about everyone in the universe knows what Control-a ~should~ do.

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Comment By: Alexandre Ferrieux (ferrieux)
Date: 2010-08-30 09:56

Message:
Yup, you're missing the fact that there are existing bindings on other
bindtags (here, on Text):

% bindtags .t
.t Text . all
% bind .t <Control-a>
% bind Text <Control-a>

    if {!$tk_strictMotif} {
        tk::TextSetCursor %W {insert display linestart}
    }

If you want your script to prevent any bindings down the sequence to fire,
use [break].

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