Get wxSearchCtrl text events working, and share the text event handler code among all the various wxTextCtrl-based classes.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@63415 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/cocoa/srchctrl.mm

@@ -77,6 +77,14 @@
     }
 }
 
+- (void)controlTextDidChange:(NSNotification *)aNotification
+{
+    wxUnusedVar(aNotification);
+    wxWidgetCocoaImpl* impl = (wxWidgetCocoaImpl* ) wxWidgetImpl::FindFromWXWidget( self );
+    if ( impl )
+        impl->controlTextDidChange();
+}
+
 @end
 
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