COW cleanup patch (1583966):

1. perform deep comparison for the classes for which it makes sense in the
   ports where this wasn't done yet
2. remove (shallow) comparison operators for the classes for which it does
   not make sense (such as wxBitmap)
3. makes wxBitmap use COW on all ports
4. adds wxObject::IsRefTo()
5. centralizes and improves COW docs


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@42752 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

docs/latex/wx/animation.tex

@@ -44,8 +44,7 @@ Default constructor.
 
 \func{}{wxAnimation}{\param{const wxAnimation\& }{anim}}
 
-Copy constructor.
-wxAnimation objects are reference counted so that this operation is very fast.
+Copy constructor, uses \helpref{reference counting}{trefcount}.
 
 \func{}{wxAnimation}{\param{const wxString\& }{name}, \param{wxAnimationType}{ type = wxANIMATION\_TYPE\_ANY}}
 
@@ -60,10 +59,8 @@ Loads an animation from a file.
 
 \func{}{\destruct{wxAnimation}}{\void}
 
-Destroys the wxAnimation object and possibly the underlying animation data.
-Because reference counting is used, the animation may not actually be
-destroyed at this point - only when the reference count is zero will the
-data be deleted.
+Destructor.
+See \helpref{reference-counted object destruction}{refcountdestruct} for more info.
 
 
 \membersection{wxAnimation::GetDelay}\label{wxanimationgetdelay}
@@ -151,3 +148,10 @@ Loads an animation from a file.
 
 \true if the operation succeeded, \false otherwise.
 
+
+\membersection{wxAnimation::operator $=$}\label{wxanimationassignment}
+
+\func{wxAnimation\&}{operator $=$}{\param{const wxAnimation\& }{brush}}
+
+Assignment operator, using \helpref{reference counting}{trefcount}.
+