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.TH "ntext" n 0\&.81 tklib "Alternative Bindings for the Text Widget"
.BS
.SH NAME
ntext \- Alternative Bindings for the Text Widget
.SH SYNOPSIS
package require \fBTcl  8\&.5\fR
.sp
package require \fBTk  8\&.5\fR
.sp
package require \fBntext  ?0\&.81?\fR
.sp
.BE
.SH DESCRIPTION
The purpose of the \fBntext\fR package is to make the text widget behave more like other text-editing applications\&. It makes the text widget more useful for implementing a text editor, and makes it behave in a way that will be more familiar to most users\&.
.PP
The package provides a binding tag named \fINtext\fR for use by text widgets in place of the default \fIText\fR binding tag\&.
.PP
Package \fBntext\fR 's functions and variables are contained entirely in the \fB::ntext\fR namespace; its other code is contained in the binding tag \fINtext\fR\&.  \fBntext\fR has no exports to the global or other namespaces, and no new widget commands\&.  It uses modified copies of the Tk code, leaving the original code, and the \fIText\fR binding tag, unchanged\&.
.PP
The differences between the \fINtext\fR binding tag and the default \fIText\fR binding tag are in three categories:
.IP \(bu
Some \fIText\fR bindings behave differently from most text-editing applications\&.  \fINtext\fR gives these bindings more familiar behaviour\&.  For details see \fIntextBindings\fR\&.
.IP \(bu
When a logical line with leading whitespace is word-wrapped onto more than one display line, the wrapped display lines begin further to the left than the first display line, which can make the text layout untidy and difficult to read\&.  \fINtext\fR can indent the wrapped lines to match the leading whitespace of the first display line (this facility is switched off by default)\&.  For details see \fIntextIndent\fR\&.
.IP \(bu
When the user navigates or selects text, Tcl/Tk sometimes needs to detect word boundaries\&.  \fINtext\fR provides improved rules for word boundary detection\&.  For details see \fIntextWordBreak\fR\&.
.PP
The remainder of this page describes the basic use and configuration of all three aspects of \fINtext\fR\&.  For more detailed information on the different facilities of \fINtext\fR, see the pages \fIntextBindings\fR, \fIntextIndent\fR, and \fIntextWordBreak\fR\&.
.PP
See Section \fBEXAMPLE\fR for how to apply the \fINtext\fR binding tag in place of the \fIText\fR binding tag\&.
.SH "CONFIGURATION OPTIONS"
\fINtext\fR provides alternatives to a number of behaviours of the classic \fIText\fR binding tag\&.  Where there is an option, the \fINtext\fR behaviour (except for display-line indentation) is switched on by default\&.
.PP
The behaviour of \fINtext\fR may be configured application-wide by setting the values of a number of namespace variables:
.PP
\fB::ntext::classicAnchor\fR
.IP \(bu
\fB0\fR - (default value) selects \fINtext\fR behaviour, i\&.e\&. the anchor point is fixed
.IP \(bu
\fB1\fR - selects classic \fIText\fR behaviour, i\&.e\&. the anchor point is variable
.PP
.PP
\fB::ntext::classicExtras\fR
.IP \(bu
\fB0\fR - (default value) selects \fINtext\fR behaviour, i\&.e\&. several traditional \fIText\fR bindings are de-activated
.IP \(bu
\fB1\fR - selects classic \fIText\fR behaviour, i\&.e\&. all \fIText\fR bindings are activated
.PP
.PP
\fB::ntext::classicMouseSelect\fR
.IP \(bu
\fB0\fR - (default value) selects \fINtext\fR behaviour, i\&.e\&. the anchor point for mouse selection operations is moved by keyboard navigation
.IP \(bu
\fB1\fR - selects classic \fIText\fR behaviour
.PP
.PP
\fB::ntext::classicWordBreak\fR
.IP \(bu
\fB0\fR - (default value) selects \fINtext\fR behaviour, i\&.e\&. platform-independent, two classes of word characters and one class of non-word characters\&.
.IP \(bu
\fB1\fR - selects classic \fIText\fR behaviour, i\&.e\&. platform-dependent, one class of word characters and one class of non-word characters
.IP \(bu
After changing this value, the matching patterns should be recalculated\&.  See \fIntextWordBreak\fR for details and advanced configuration options\&.
.PP
.PP
\fB::ntext::classicWrap\fR
.IP \(bu
\fB0\fR - selects \fINtext\fR behaviour, i\&.e\&. display lines of text widgets in \fI-wrap\fR \fIword\fR mode are indented to match the initial whitespace of the first display line of a logical line\&.  If the widget already holds text when this value is set, a function call may be necessary\&.  See \fIntextIndent\fR for detailed instructions on the use of \fINtext\fR 's indentation\&.
.IP \(bu
\fB1\fR - (default value) selects classic \fIText\fR behaviour, i\&.e\&. no indentation
.PP
.PP
\fB::ntext::overwrite\fR
.IP \(bu
\fB0\fR - (initial value) text typed at the keyboard is inserted into the widget
.IP \(bu
\fB1\fR - text typed at the keyboard overwrites text already in the widget
.IP \(bu
The value is toggled by the \fIInsert\fR key\&.
.PP
.SH EXAMPLE
To create a text widget \&.t and use the \fINtext\fR bindings:
.CS


package require ntext
text \&.t
bindtags \&.t {\&.t Ntext \&. all}

.CE
See bindtags for more information\&.
.SH "SEE ALSO"
bindtags, ntextBindings, ntextIndent, ntextWordBreak, re_syntax, regexp, text
.SH KEYWORDS
bindtags, re_syntax, regexp, text