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📁 《Big C++ 》Third Edition电子书和代码全集-Part1

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	<title>Big C++: Chptr. 27 -- Graphical User Interfaces</title>
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  <meta name="Copyright" content="2005 John Wiley & Sons">
  <meta name="Author" content="Kurt Schmidt">
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<h2><font color='#009999'>27.5 Event Handling (cont.)</font></h2>
<ul>
  <li><font size="+1">We create an event table out of macros that automatically 
    produce correct code.</font></li>
  <li><font size="+1">The generic form of the event table is: 
    <blockquote> 
      <pre>BEGIN_EVENT_TABLE(<i>ClassName</i>, <i>BaseClassName</i>)
   EVT_TYPE(<i>parameters</i>, <i>function</i>)
   . . .
END_EVENT_TABLE()</pre>
    </blockquote>
    </font></li>
  <li><font size="+1">There are several different event types; here we use the 
    <tt>MENU</tt> event type that requires a menu ID as a parameter. 
    <blockquote> 
      <pre>BEGIN_EVENT_TABLE(EventFrame, wxFrame)
   EVT_MENU(IS_SAY_HELLO, EVentFrame::OnSayHello)
END_EVENT_TABLE()</pre>
    </blockquote>
    </font></li>
	
  <li><font size="+1">We need to insert another macro into the definition of each 
    class that has an event table. 
    <blockquote>
      <pre>class EventFrame : public wxFrame
{
   . . . 
private:
   wxTextCtrl* text;
   DECLARE_EVENT_TABLE()
};</pre>
    </blockquote></font>
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