path: root/tcllib/idoc/man/files/modules/term/ipager.n

'\"
'\" Generated from file 'ipager\&.man' by tcllib/doctools with format 'nroff'
'\" Copyright (c) 2006 Andreas Kupries <andreas_kupries@users\&.sourceforge\&.net>
'\"
.TH "term::interact::pager" n 0\&.1 tcllib "Terminal control"
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.BS
.SH NAME
term::interact::pager \- Terminal widget, paging
.SH SYNOPSIS
package require \fBTcl  8\&.4\fR
.sp
package require \fBterm::interact::pager  ?0\&.1?\fR
.sp
\fBterm::interact::pager\fR \fIobject\fR \fItext\fR ?\fIoptions\fR\&.\&.\&.?
.sp
\fIobject\fR \fBinteract\fR
.sp
\fIobject\fR \fBdone\fR
.sp
\fIobject\fR \fBclear\fR
.sp
\fIobject\fR \fBtext\fR \fItext\fR
.sp
\fIobject\fR \fBconfigure\fR
.sp
\fIobject\fR \fBconfigure\fR \fIoption\fR
.sp
\fIobject\fR \fBconfigure\fR \fIoption\fR \fIvalue\fR\&.\&.\&.
.sp
\fIobject\fR \fBcget\fR \fIoption\fR
.sp
.BE
.SH DESCRIPTION
This package provides a class for the creation of a simple paging
text display\&.
.SH "CLASS API"
The package exports a single command, the class command, enabling the
creation of pager instances\&. Its API is:
.TP
\fBterm::interact::pager\fR \fIobject\fR \fItext\fR ?\fIoptions\fR\&.\&.\&.?
This command creates a new pager object with the name \fIobject\fR,
initializes it, and returns the fully qualified name of the object
command as its result\&.
.sp
The argument is the text to show, possibly followed by configuration
options and their values\&. The options are explained in the section
\fBConfiguration\fR\&.
.PP
.SH "OBJECT API"
The objects created by the class command provide the methods listed
below:
.TP
\fIobject\fR \fBinteract\fR
Show the pager in the screen at the configured location and start
interacting with it\&. This opens its own event loop for the processing
of incoming characters\&. The method returns when the interaction has
completed\&. See section \fBInteraction\fR for a description of the
possible interaction\&.
.TP
\fIobject\fR \fBdone\fR
This method can be used by user supplied actions to terminate the
interaction with the object\&.
.TP
\fIobject\fR \fBclear\fR
This method can be used by user supplied actions to remove the pager
from the terminal\&.
.TP
\fIobject\fR \fBtext\fR \fItext\fR
This method can be used to change the text shown by the pager\&.
The pager will reset the dispay to show the first line of the
text at the top\&.
.TP
\fIobject\fR \fBconfigure\fR
.TP
\fIobject\fR \fBconfigure\fR \fIoption\fR
.TP
\fIobject\fR \fBconfigure\fR \fIoption\fR \fIvalue\fR\&.\&.\&.
.TP
\fIobject\fR \fBcget\fR \fIoption\fR
Standard methods to retrieve and configure the options of the pager\&.
.PP
.SH CONFIGURATION
A pager instance recognizes the following options:
.TP
\fB-in\fR chan
Specifies the channel to read character sequences from\&. Defaults to
\fBstdin\fR\&.
.TP
\fB-out\fR chan
Specifies the channel to write the pager contents to\&. Defaults to
\fBstdout\fR\&.
.TP
\fB-column\fR int
Specifies the column of the terminal where the left margin of the
pager display should appear\&. Defaults to 0, i\&.e\&. the left-most
column\&.
.TP
\fB-line\fR int
Specifies the line of the terminal where the top margin of the pager
display should appear\&. Defaults to 0, i\&.e\&. the top-most line\&.
.TP
\fB-height\fR int
Specifies the number of lines of text to show at most in the
display\&. Defaults to 25\&.
.TP
\fB-actions\fR dict
Specifies a dictionary containing additional actions, using character
sequences as keys\&. Note that these sequences cannot override the
hardwired sequences described in section \fBInteraction\fR\&.
.PP
.SH INTERACTION
A pager object recognizes the control sequences listed below and acts
as described\&. The user can supply more control sequences to act on via
the configuration, but is not able to overide these defaults\&.
.TP
Cursor Up
The text is scrolled down a single line, making one more line visible
at the top\&. The pager will not react if the first line of the text is
already shown\&.
.TP
Cursor Down
The text is scrolled up a single line, making one more line visible at
the bottom\&. The pager will not react if the last line of the text is
already shown\&.
.TP
Page Up
The text is scrolled down a page\&. The pager will not react if the
first line of the text is already shown\&.
.TP
Page Down
The text is scrolled up a page\&. The pager will not react if the last
line of the text is already shown\&.
.TP
Enter/Return
The interaction with the object is terminated\&.
.PP
.SH "BUGS, IDEAS, FEEDBACK"
This document, and the package it describes, will undoubtedly contain
bugs and other problems\&.
Please report such in the category \fIterm\fR of the
\fITcllib Trackers\fR [http://core\&.tcl\&.tk/tcllib/reportlist]\&.
Please also report any ideas for enhancements you may have for either
package and/or documentation\&.
.SH KEYWORDS
control, pager, terminal, text display
.SH CATEGORY
Terminal control
.SH COPYRIGHT
.nf
Copyright (c) 2006 Andreas Kupries <andreas_kupries@users\&.sourceforge\&.net>

.fi