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+<title>Mainly Easy</title>
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+ <a href="index.html">
+<font color="#004faf">Home</font></a>
+ | <a href="classes.html">
+<font color="#004faf">All&nbsp;Classes</font></a>
+ | <a href="mainclasses.html">
+<font color="#004faf">Main&nbsp;Classes</font></a>
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+<font color="#004faf">Functions</font></a>
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+<td align="right" valign="center"><img src="logo32.png" align="right" width="64" height="32" border="0"></td></tr></table><h1 align=center>Mainly Easy</h1>
+
+
+<p> 
+<p> (<tt>main.cpp</tt>.)
+<p> 
+
+<pre>    #include &lt;<a href="qapplication-h.html">qapplication.h</a>&gt;
+    #include "chartform.h"
+
+    int main( int argc, char *argv[] )
+    {
+        <a href="qapplication.html">QApplication</a> app( argc, argv );
+
+        <a href="qstring.html">QString</a> filename;
+    <a name="x2557"></a>    if ( app.<a href="qapplication.html#argc">argc</a>() &gt; 1 ) {
+    <a name="x2558"></a>        filename = app.<a href="qapplication.html#argv">argv</a>()[1];
+    <a name="x2561"></a>        if ( !filename.<a href="qstring.html#endsWith">endsWith</a>( ".cht" ) )
+                filename = <a href="qstring.html#QString-null">QString::null</a>;
+        }
+
+        ChartForm *cf = new ChartForm( filename );
+    <a name="x2560"></a>    app.<a href="qapplication.html#setMainWidget">setMainWidget</a>( cf );
+        cf-&gt;<a href="qwidget.html#show">show</a>();
+
+        return app.<a href="qapplication.html#exec">exec</a>();
+    }
+</pre>
+<p> We have kept the main() function simple and small. We create a
+<a href="qapplication.html">QApplication</a> object and pass it the command line arguments. We are
+allowing users to invoke the program with <tt>chart mychart.cht</tt>, so if
+they've added a filename we pass that through to the chart form
+constructor. Most of the action takes place within the chart form
+which we'll review next.
+<p> <p align="right">
+<a href="tutorial2-03.html">&laquo; Data Elements</a> |
+<a href="tutorial2.html">Contents</a> |
+<a href="tutorial2-05.html">Presenting the GUI &raquo;</a>
+</p>
+<p> 
+<!-- eof -->
+<p><address><hr><div align=center>
+<table width=100% cellspacing=0 border=0><tr>
+<td>Copyright &copy; 2007
+<a href="troll.html">Trolltech</a><td align=center><a href="trademarks.html">Trademarks</a>
+<td align=right><div align=right>Qt 3.3.8</div>
+</table></div></address></body>
+</html>