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<TITLE> Creating a TixControl Widget<A NAME=121> </A></TITLE>
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<A NAME=Contents> </A><H3><A NAME=SECTION00032100000000000000> Creating a TixControl Widget<A NAME=121> </A></A></H3>
<P>
The following code demonstrates how to create a TixControl widget and
specify its options:
<P>
<tt> tixControl .lawyers -label Lawyers: -max 10 -min 0<BR>
.lawyers config -integer true -step 2
</tt>
<P>
This example creates a TixControl widget that let us to select the
numbers of lawyers we wish to be allowed in this country. (Figure
1-2)
<P>
Let us examine the options: the <tt>-label</tt> option specifies a
caption for this widget. The <tt>-max</tt> option specifies the maximum
number of lawyers we can choose. The <tt>-min</tt> option specifies the
minimum number of lawyers we can choose: although we would love to
enter a negative number, reality dictate that the lower limit must
be zero. The <tt>-integer</tt> option indicates that the number of
lawyers must be an integer; that is, we respect the lawyers' rights
not to be chopped up into decimal points. Finally, since lawyers
seem to go in pairs, we set the <tt>-step</tt> option to <tt>2</tt>, which
indicates that when we press the up/down arrow buttons, we want the
number of lawyers to go up and down by two each time.
<P>
<blockquote> <P><CENTER><IMG SRC="../gif/tix/intro/lawyer.gif">
</CENTER>
</blockquote>
<P>
As shown in the example, you can create and manipulate a Tix widget
in the same manner as the standard Tk widgets. The options of the
widget can be specified during the creation of the widget.
Alternatively, they can be changed by the <tt>configure</tt> widget
command. In addition, options can also be specified in the option
database or as X resources. Here is an example that produces the
same result as the previous code fragment:
<P>
<tt> option add *lawyers.max 10<BR>
option add *lawyers.min 0<BR>
tixControl .lawyers -label Lawyers: -integer true<BR>
.lawyers config -step 2
</tt>
<P>
In figure 1-3, you can see the composition of
TixControl: it is made out of a label widget, an entry widget and
two button widgets. Widgets that are composed of other widgets, like
TixControl, are called <em>mega-widgets</em>. Most widgets in the Tix
library are mega-widgets (xx: and as you know this book is about
them!).
<P>
<blockquote> <P><CENTER><IMG SRC="../gif/tix/intro/law_comp.gif">
</CENTER>
</blockquote>
<P>
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<A HREF=http://tix.sourceforge.net>http://tix.sourceforge.net</A><BR>
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