message - Create and manipulate message widgets
-anchor -background -borderwidth
-cursor -font -foreground
-highlightbackground -highlightcolor -highlightthickness
-padx -pady -relief
-takefocus -text -textvariable
See the options
manual entry for details on the standard options.
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 width
option is not specified. Defaults to 150.
Specifies how to
justify lines of text. Must be one of left
. Defaults to left
. This option works together with the
, and width
options to provide a variety of arrangements of the text within the window.
options determine the amount of screen
space needed to display the text. The anchor
options determine where this rectangular area is displayed within
the widget's window, and the justify
option determines how each line is
displayed within that rectangular region. For example, suppose anchor
, 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
from the right side of the window; the entire text block will be
centered in the vertical span of the window. [-width
Specifies the length of lines in the window. The value
may have any of the forms acceptable to Tk_GetPixels
. If this option
has a value greater than zero then the aspect
option is ignored and the
option determines the line length. If this option has a value
less than or equal to zero, then the aspect
option determines the line
command creates a new window (given by the pathName
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 message
command returns its pathName
the time this command is invoked, there must not exist a window named
, but pathName
's parent must exist.
A message is a widget that displays a textual string. A message widget has three
special features. 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.
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).
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
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 “0123456789abcdef\x” then
control characters and undefined characters are not displayed at all.
command creates a new Tcl command whose name is
. This command may be used to invoke various operations on the
widget. It has the following general form:
pathName option ?arg arg ...?
and the arg
s determine the exact behavior of the command.
The following commands are possible for message widgets:
- pathName cget option
- Returns the current value of the configuration option given by
option. Option may have any of the values accepted by the
- pathName configure ?option? ?value option value
- Query or modify the configuration options of the widget. If no
option is specified, returns a list describing all of the available
options for pathName (see Tk_ConfigureInfo for information
on the format of this list). If option is specified with no
value, 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 option is specified). If one or more
option-value 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. Option may have any of the values
accepted by the message command.
When a new message is created, it has no default event bindings: messages are
intended for output purposes only.
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.