title: mouseDown: not firing in WebView subclass
body: <p>I think this should be quite simple, but I cannot make it work.</p>
  
  <p><strong>I want to detect mouse clicks on a WebView...</strong></p>
  
  <p>I've subclassed WebView, here is the code</p>
  
  <pre><code>#import &lt;AppKit/AppKit.h&gt;
  #import &lt;Foundation/Foundation.h&gt;
  #import &lt;WebKit/WebKit.h&gt;
  
  @interface ResultsWebView : WebView {
  }
  @end
  </code></pre>
  
  <p>and</p>
  
  <pre><code>#import "ResultsWebView.h"
  
  @implementation ResultsWebView
  
  - (void)mouseDown:(NSEvent *)theEvent {
      NSLog(@"%@", theEvent);
  }
  
  @end
  </code></pre>
  
  <p>In my xib file, I added a WebView and then changed the class to ResultsWebView. </p>
  
  <p>I've checked in runtime and the object is a ResultsWebView, but the mouseDown event is never called...</p>
  
  <p>What am I missing?</p>