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authorWilliam Joye <wjoye@cfa.harvard.edu>2018-01-02 20:34:49 (GMT)
committerWilliam Joye <wjoye@cfa.harvard.edu>2018-01-02 20:34:49 (GMT)
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-'\"
-'\" Copyright (c) 1990-1994 The Regents of the University of California.
-'\" Copyright (c) 1994-1996 Sun Microsystems, Inc.
-'\"
-'\" See the file "license.terms" for information on usage and redistribution
-'\" of this file, and for a DISCLAIMER OF ALL WARRANTIES.
-'\"
-.TH message n 4.0 Tk "Tk Built-In Commands"
-.so man.macros
-.BS
-'\" Note: do not modify the .SH NAME line immediately below!
-.SH NAME
-message \- Create and manipulate 'message' non-interactive text widgets
-.SH SYNOPSIS
-\fBmessage\fR \fIpathName \fR?\fIoptions\fR?
-.SO
-\-anchor \-background \-borderwidth
-\-cursor \-font \-foreground
-\-highlightbackground \-highlightcolor \-highlightthickness
-\-padx \-pady \-relief
-\-takefocus \-text \-textvariable
-.SE
-.SH "WIDGET-SPECIFIC OPTIONS"
-.OP \-aspect aspect Aspect
-Specifies a non-negative integer value indicating desired
-aspect ratio for the text. The aspect ratio is specified as
-100*width/height. 100 means the text should
-be as wide as it is tall, 200 means the text should
-be twice as wide as it is tall, 50 means the text should
-be twice as tall as it is wide, and so on.
-Used to choose line length for text if \fB\-width\fR option
-is not specified.
-Defaults to 150.
-.OP \-justify justify Justify
-Specifies how to justify lines of text.
-Must be one of \fBleft\fR, \fBcenter\fR, or \fBright\fR. Defaults
-to \fBleft\fR.
-This option works together with the \fB\-anchor\fR, \fB\-aspect\fR,
-\fB\-padx\fR, \fB\-pady\fR, and \fB\-width\fR options to provide a variety
-of arrangements of the text within the window.
-The \fB\-aspect\fR and \fB\-width\fR options determine the amount of
-screen space needed to display the text.
-The \fB\-anchor\fR, \fB\-padx\fR, and \fB\-pady\fR options determine where this
-rectangular area is displayed within the widget's window, and the
-\fB\-justify\fR option determines how each line is displayed within that
-rectangular region.
-For example, suppose \fB\-anchor\fR is \fBe\fR and \fB\-justify\fR is
-\fBleft\fR, and that the message window is much larger than needed
-for the text.
-The text will be displayed so that the left edges of all the lines
-line up and the right edge of the longest line is \fB\-padx\fR from
-the right side of the window; the entire text block will be centered
-in the vertical span of the window.
-.OP \-width width Width
-Specifies the length of lines in the window.
-The value may have any of the forms acceptable to \fBTk_GetPixels\fR.
-If this option has a value greater than zero then the \fB\-aspect\fR
-option is ignored and the \fB\-width\fR option determines the line
-length.
-If this option has a value less than or equal to zero, then
-the \fB\-aspect\fR option determines the line length.
-.BE
-.SH DESCRIPTION
-.PP
-The \fBmessage\fR command creates a new window (given by the
-\fIpathName\fR argument) and makes it into a message widget.
-Additional
-options, described above, may be specified on the command line
-or in the option database
-to configure aspects of the message such as its colors, font,
-text, and initial relief. The \fBmessage\fR command returns its
-\fIpathName\fR argument. At the time this command is invoked,
-there must not exist a window named \fIpathName\fR, but
-\fIpathName\fR's parent must exist.
-.PP
-A message is a widget that displays a textual string. A message
-widget has three special features that differentiate it from a
-\fBlabel\fR widget. First, it breaks up
-its string into lines in order to produce a given aspect ratio
-for the window. The line breaks are chosen at word boundaries
-wherever possible (if not even a single word would fit on a
-line, then the word will be split across lines). Newline characters
-in the string will force line breaks; they can be used, for example,
-to leave blank lines in the display.
-.PP
-The second feature of a message widget is justification. The text
-may be displayed left-justified (each line starts at the left side of
-the window), centered on a line-by-line basis, or right-justified
-(each line ends at the right side of the window).
-.PP
-The third feature of a message widget is that it handles control
-characters and non-printing characters specially. Tab characters
-are replaced with enough blank space to line up on the next
-8-character boundary. Newlines cause line breaks. Other control
-characters (ASCII code less than 0x20) and characters not defined
-in the font are displayed as a four-character sequence \fB\ex\fIhh\fR where
-\fIhh\fR is the two-digit hexadecimal number corresponding to
-the character. In the unusual case where the font does not contain
-all of the characters in
-.QW 0123456789abcdef\ex
-then control characters and undefined characters are not displayed at all.
-.SH "WIDGET COMMAND"
-.PP
-The \fBmessage\fR command creates a new Tcl command whose
-name is \fIpathName\fR. This
-command may be used to invoke various
-operations on the widget. It has the following general form:
-.CS
-\fIpathName option \fR?\fIarg arg ...\fR?
-.CE
-\fIOption\fR and the \fIarg\fRs
-determine the exact behavior of the command. The following
-commands are possible for message widgets:
-.TP
-\fIpathName \fBcget \fIoption\fR
-.
-Returns the current value of the configuration option given
-by \fIoption\fR.
-\fIOption\fR may have any of the values accepted by the \fBmessage\fR
-command.
-.TP
-\fIpathName \fBconfigure\fR ?\fIoption\fR? ?\fIvalue option value ...\fR?
-.
-Query or modify the configuration options of the widget.
-If no \fIoption\fR is specified, returns a list describing all of
-the available options for \fIpathName\fR (see \fBTk_ConfigureInfo\fR for
-information on the format of this list). If \fIoption\fR is specified
-with no \fIvalue\fR, then the command returns a list describing the
-one named option (this list will be identical to the corresponding
-sublist of the value returned if no \fIoption\fR is specified). If
-one or more \fIoption\-value\fR pairs are specified, then the command
-modifies the given widget option(s) to have the given value(s); in
-this case the command returns an empty string.
-\fIOption\fR may have any of the values accepted by the \fBmessage\fR
-command.
-.SH "DEFAULT BINDINGS"
-.PP
-When a new message is created, it has no default event bindings:
-messages are intended for output purposes only.
-.SH BUGS
-.PP
-Tabs do not work very well with text that is centered or right-justified.
-The most common result is that the line is justified wrong.
-.SH "SEE ALSO"
-label(n)
-.SH KEYWORDS
-message, widget
-'\" Local Variables:
-'\" mode: nroff
-'\" End: