Initial review of various [q-r] by Utensil Candel.

[wxWidgets.git] / interface / weakref.h

diff --git a/interface/weakref.h b/interface/weakref.h
index a527e1d029c423fe1648cb34b3b019b8365bdfdd..03a96631303608bd1138a6c62c448955c930bef3 100644 (file)
--- a/interface/weakref.h
+++ b/interface/weakref.h
@@ -9,8 +9,8 @@
 /**
     @wxheader{weakref.h}
 
-    wxWeakRefDynamicT is a template class for weak references that is used in
-    the same way as wxWeakRefT. The only difference is that wxWeakRefDynamic
+    wxWeakRefDynamic<T> is a template class for weak references that is used in
+    the same way as wxWeakRef<T>. The only difference is that wxWeakRefDynamic
     defaults to using @c dynamic_cast for establishing the object
     reference (while wxWeakRef defaults to @c static_cast).
 
@@ -18,14 +18,14 @@
     have a little better run-time performance. The role of wxWeakRefDynamic
     is to handle objects which derived type one does not know.
 
-    @note wxWeakRefT selects an implementation based on the static type
+    @note wxWeakRef<T> selects an implementation based on the static type
     of T. If T does not have wxTrackable statically, it defaults to to a mixed-
     mode operation, where it uses @c dynamic_cast as the last measure (if
     available from the compiler and enabled when building wxWidgets).
 
-    For general cases, wxWeakRefT is the better choice.
+    For general cases, wxWeakRef<T> is the better choice.
 
-    For API documentation, see: wxWeakRef
+    For API documentation, see: wxWeakRef<T>
 
     @library{wxcore}
     @category{FIXME}
@@ -48,17 +48,53 @@ public:
     pointer, but when the object pointed is destroyed, the weak reference is
     automatically reset to a @NULL pointer.
 
-    wxWeakRefT can be used whenever one must keep a pointer to an object
+    wxWeakRef<T> can be used whenever one must keep a pointer to an object
     that one does not directly own, and that may be destroyed before the object
     holding the reference.
 
-    wxWeakRefT is a small object and the mechanism behind it is fast
+    wxWeakRef<T> is a small object and the mechanism behind it is fast
     (@b O(1)). So the overall cost of using it is small.
 
+    Example
+    
+    @code
+    wxWindow *wnd = new wxWindow( parent, wxID_ANY, "wxWindow" );
+    wxWeakRef<wxWindow> wr = wnd;  
+    wxWindowRef wr2 = wnd;        // Same as above, but using a typedef
+    // Do things with window
+    wnd->Show( true );
+    // Weak ref is used like an ordinary pointer 
+    wr->Show( false );
+    wnd->Destroy(); 
+    // Now the weak ref has been reset, so we don't risk accessing
+    // a dangling pointer:
+    wxASSERT( wr==NULL );
+    @endcode
+
+    wxWeakRef<T> works for any objects that are derived from wxTrackable. By default,
+    wxEvtHandler and wxWindow derive from wxTrackable. However, wxObject does not, so
+    types like wxFont and wxColour are not trackable. The example below shows how to
+    create a wxObject derived class that is trackable:
+
+    @code
+    class wxMyTrackableObject : public wxObject, public wxTrackable
+    { 
+        // ... other members here 
+    }; 
+    @endcode
+
+    The following types of weak references are predefined:
+
+    @code
+    typedef wxWeakRef<wxEvtHandler>  wxEvtHandlerRef;
+    typedef wxWeakRef<wxWindow>      wxWindowRef;
+    @endcode
+
+
     @library{wxbase}
     @category{FIXME}
 
-    @see wxSharedPtr, wxScopedPtr
+    @see wxSharedPtr<T>, wxScopedPtr<T>
 */
 template<typename T>
 class wxWeakRef<T>
@@ -76,7 +112,8 @@ public:
 
     /**
         Called when the tracked object is destroyed. Be default sets
-        internal pointer to @NULL.
+        internal pointer to @NULL. You need to call this method if
+        you override it.
     */
     virtual void OnObjectDestroy();