ntext(n) - f14

1ntext(n)           Alternative Bindings for the Text Widget           ntext(n)
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NAME

8       ntext - Alternative Bindings for the Text Widget
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SYNOPSIS

11       package require Tcl  8.5
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13       package require Tk  8.5
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15       package require ntext  ?0.81?
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DESCRIPTION

20       The purpose of the ntext package is to make the text widget behave more
21       like other text-editing applications. It makes  the  text  widget  more
22       useful  for  implementing  a  text editor, and makes it behave in a way
23       that will be more familiar to most users.
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25       The package provides a binding tag named Ntext for use by text  widgets
26       in place of the default Text binding tag.
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28       Package  ntext 's functions and variables are contained entirely in the
29       ::ntext namespace; its other code  is  contained  in  the  binding  tag
30       Ntext.   ntext has no exports to the global or other namespaces, and no
31       new widget commands.  It uses modified copies of the Tk  code,  leaving
32       the original code, and the Text binding tag, unchanged.
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34       The  differences  between  the  Ntext  binding tag and the default Text
35       binding tag are in three categories:
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37       ·      Some Text bindings behave  differently  from  most  text-editing
38              applications.   Ntext  gives these bindings more familiar behav‐
39              iour.  For details see ntextBindings.
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41       ·      When a logical line with leading whitespace is word-wrapped onto
42              more than one display line, the wrapped display lines begin fur‐
43              ther to the left than the first display line, which can make the
44              text  layout untidy and difficult to read.  Ntext can indent the
45              wrapped lines to match the leading whitespace of the first  dis‐
46              play  line  (this  facility  is  switched  off by default).  For
47              details see ntextIndent.
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49       ·      When the user navigates or selects text, Tcl/Tk sometimes  needs
50              to  detect  word  boundaries.  Ntext provides improved rules for
51              word boundary detection.  For details see ntextWordBreak.
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53       The remainder of this page describes the basic use and configuration of
54       all  three aspects of Ntext.  For more detailed information on the dif‐
55       ferent facilities of Ntext, see the pages  ntextBindings,  ntextIndent,
56       and ntextWordBreak.
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58       See  Section EXAMPLE for how to apply the Ntext binding tag in place of
59       the Text binding tag.
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CONFIGURATION OPTIONS

62       Ntext provides alternatives to a number of behaviours  of  the  classic
63       Text  binding  tag.   Where  there  is  an  option, the Ntext behaviour
64       (except for display-line indentation) is switched on by default.
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66       The behaviour of Ntext may be configured  application-wide  by  setting
67       the values of a number of namespace variables:
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69       ::ntext::classicAnchor
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71       ·      0  -  (default  value)  selects Ntext behaviour, i.e. the anchor
72              point is fixed
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74       ·      1 - selects classic Text behaviour, i.e.  the  anchor  point  is
75              variable
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77       ::ntext::classicExtras
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79       ·      0 - (default value) selects Ntext behaviour, i.e. several tradi‐
80              tional Text bindings are de-activated
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82       ·      1 - selects classic Text behaviour, i.e. all Text  bindings  are
83              activated
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85       ::ntext::classicMouseSelect
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87       ·      0  -  (default  value)  selects Ntext behaviour, i.e. the anchor
88              point for mouse selection operations is moved by keyboard  navi‐
89              gation
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91       ·      1 - selects classic Text behaviour
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93       ::ntext::classicWordBreak
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95       ·      0 - (default value) selects Ntext behaviour, i.e. platform-inde‐
96              pendent, two classes of word characters and one  class  of  non-
97              word characters.
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99       ·      1 - selects classic Text behaviour, i.e. platform-dependent, one
100              class of word characters and one class of non-word characters
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102       ·      After changing this  value,  the  matching  patterns  should  be
103              recalculated.   See ntextWordBreak for details and advanced con‐
104              figuration options.
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106       ::ntext::classicWrap
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108       ·      0 - selects Ntext behaviour, i.e. display lines of text  widgets
109              in  -wrap word mode are indented to match the initial whitespace
110              of the first display line of a  logical  line.   If  the  widget
111              already  holds  text when this value is set, a function call may
112              be necessary.  See ntextIndent for detailed instructions on  the
113              use of Ntext 's indentation.
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115       ·      1  -  (default  value)  selects  classic Text behaviour, i.e. no
116              indentation
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118       ::ntext::overwrite
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120       ·      0 - (initial value) text typed at the keyboard is inserted  into
121              the widget
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123       ·      1  -  text  typed at the keyboard overwrites text already in the
124              widget
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126       ·      The value is toggled by the Insert key.
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EXAMPLE

129       To create a text widget .t and use the Ntext bindings:
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131       package require ntext
132       text .t
133       bindtags .t {.t Ntext . all}
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135       See bindtags for more information.
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KEYWORDS

142       bindtags, re_syntax, regexp, text
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146ntext                                0.81                             ntext(n)

NAME

SYNOPSIS

DESCRIPTION

CONFIGURATION OPTIONS

EXAMPLE

SEE ALSO

KEYWORDS