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<title>16.1.6.6 Tk Option Data Types
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<H3><A NAME=
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16.1.6.6 Tk Option Data Types
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<DT><STRONG>anchor
</STRONG></DT>
<DD>Legal values are points of the compass:
<code>"n"</code>,
<code>"ne"</code>,
<code>"e"</code>,
<code>"se"</code>,
<code>"s"</code>,
<code>"sw"</code>,
<code>"w"</code>,
<code>"nw"</code>, and also
<DT><STRONG>bitmap
</STRONG></DT>
<DD>There are eight built-in, named bitmaps:
<code>'error'
</code>,
<code>'gray25'
</code>,
<code>'gray50'
</code>,
<code>'hourglass'
</code>,
<code>'info'
</code>,
<code>'questhead'
</code>,
<code>'question'
</code>,
<code>'warning'
</code>. To specify an X bitmap
filename, give the full path to the file, preceded with an
<code>@
</code>,
as in
<code>"@/usr/contrib/bitmap/gumby.bit"</code>.
<DT><STRONG>boolean
</STRONG></DT>
<DD>You can pass integers
0 or
1 or the strings
<code>"yes"</code> or
<code>"no"</code> .
<DT><STRONG>callback
</STRONG></DT>
<DD>This is any Python function that takes no arguments. For example:
<div class=
"verbatim"><pre>
fred[
"command"] = print_it
<DT><STRONG>color
</STRONG></DT>
<DD>Colors can be given as the names of X colors in the rgb.txt file,
or as strings representing RGB values in
4 bit:
<code>"#RGB"</code>,
8
bit:
<code>"#RRGGBB"</code>,
12 bit
" <code>"#RRRGGGBBB
"</code>, or 16 bit
<code>"#RRRRGGGGBBBB
"</code> ranges, where R,G,B here represent any
legal hex digit. See page 160 of Ousterhout's book for details.
<DT><STRONG>cursor</STRONG></DT>
<DD>The standard X cursor names from <span class="file
">cursorfont.h</span> can be used,
without the <code>XC_</code> prefix. For example to get a hand cursor
(<tt class="constant
">XC_hand2</tt>), use the string <code>"hand2
"</code>. You can also
specify a bitmap and mask file of your own. See page 179 of
<DT><STRONG>distance</STRONG></DT>
<DD>Screen distances can be specified in either pixels or absolute
distances. Pixels are given as numbers and absolute distances as
strings, with the trailing character denoting units: <code>c</code>
for centimetres, <code>i</code> for inches, <code>m</code> for millimetres,
<code>p</code> for printer's points. For example, 3.5 inches is expressed
<DT><STRONG>font</STRONG></DT>
<DD>Tk uses a list font name format, such as <code>{courier 10 bold}</code>.
Font sizes with positive numbers are measured in points;
sizes with negative numbers are measured in pixels.
<DT><STRONG>geometry</STRONG></DT>
<DD>This is a string of the form "<tt class=
"samp"><var>width
</var>x
<var>height
</var></tt>", where
width and height are measured in pixels for most widgets (in
characters for widgets displaying text). For example:
<code>fred["geometry
"] = "200x100
"</code>.
<DT><STRONG>justify</STRONG></DT>
<DD>Legal values are the strings: <code>"left
"</code>,
<code>"center
"</code>, <code>"right
"</code>, and <code>"fill
"</code>.
<DT><STRONG>region</STRONG></DT>
<DD>This is a string with four space-delimited elements, each of
which is a legal distance (see above). For example: <code>"2 3 4
5"</code> and <code>"3i
2i
4.5i
2i
"</code> and <code>"3c
2c
4c
10.43c
"</code>
<DT><STRONG>relief</STRONG></DT>
<DD>Determines what the border style of a widget will be. Legal
values are: <code>"raised
"</code>, <code>"sunken
"</code>,
<code>"flat
"</code>, <code>"groove
"</code>, and <code>"ridge
"</code>.
<DT><STRONG>scrollcommand</STRONG></DT>
<DD>This is almost always the <tt class="method
">set()</tt> method of some scrollbar
widget, but can be any widget method that takes a single argument.
Refer to the file <span class="file
">Demo/tkinter/matt/canvas-with-scrollbars.py</span>
in the Python source distribution for an example.
<DT><STRONG>wrap:</STRONG></DT>
<DD>Must be one of: <code>"none
"</code>, <code>"char
"</code>, or <code>"word
"</code>.
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