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<H3><A NAME="SECTION0018166000000000000000">
16.1.6.6 Tk Option Data Types</A>
</H3>
<P>
<a id='l2h-4839' xml:id='l2h-4839'></a>

<P>
<DL>
<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
<code>"center"</code>.

<P>
</DD>
<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>.

<P>
</DD>
<DT><STRONG>boolean</STRONG></DT>
<DD>You can pass integers 0 or 1 or the strings <code>"yes"</code> or <code>"no"</code> .

<P>
</DD>
<DT><STRONG>callback</STRONG></DT>
<DD>This is any Python function that takes no arguments.  For example:
<div class="verbatim"><pre>
    def print_it():
            print "hi there"
    fred["command"] = print_it
</pre></div>

<P>
</DD>
<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.

<P>
</DD>
<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
Ousterhout's book.

<P>
</DD>
<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
as <code>"3.5i"</code>.

<P>
</DD>
<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.

<P>
</DD>
<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>.

<P>
</DD>
<DT><STRONG>justify</STRONG></DT>
<DD>Legal values are the strings: <code>"left"</code>,
<code>"center"</code>, <code>"right"</code>, and <code>"fill"</code>.

<P>
</DD>
<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>
are all legal regions.

<P>
</DD>
<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>.

<P>
</DD>
<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.

<P>
</DD>
<DT><STRONG>wrap:</STRONG></DT>
<DD>Must be one of: <code>"none"</code>, <code>"char"</code>, or <code>"word"</code>.
</DD>
</DL>

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