the Append also does an INCREF, that's one more than we need.

[wxWidgets.git] / include / wx / object.h

diff --git a/include/wx/object.h b/include/wx/object.h
index 43e96756ebbd4ecfe6fd7c815613544f70245f25..dfb88a48c62f946e4c7fe80caeeb14b8b0483669 100644 (file)
--- a/include/wx/object.h
+++ b/include/wx/object.h
@@ -13,15 +13,10 @@
 #ifndef _WX_OBJECTH__
 #define _WX_OBJECTH__
 
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-#pragma interface "object.h"
-#endif
-
 // ----------------------------------------------------------------------------
 // headers
 // ----------------------------------------------------------------------------
 
-#include "wx/defs.h"
 #include "wx/memory.h"
 
 class WXDLLIMPEXP_BASE wxObject;
@@ -38,15 +33,6 @@ class WXDLLIMPEXP_BASE wxObject;
 // conditional compilation
 // ----------------------------------------------------------------------------
 
-// this shouldn't be needed any longer as <wx/msw/private.h> does it but it
-// doesn't hurt neither
-#ifdef GetClassName
-#undef GetClassName
-#endif
-#ifdef GetClassInfo
-#undef GetClassInfo
-#endif
-
 class WXDLLIMPEXP_BASE wxClassInfo;
 class WXDLLIMPEXP_BASE wxHashTable;
 class WXDLLIMPEXP_BASE wxObjectRefData;
@@ -78,7 +64,8 @@ public:
 
     ~wxClassInfo();
 
-    wxObject *CreateObject() { return m_objectConstructor ? (*m_objectConstructor)() : 0; }
+    wxObject *CreateObject() const { return m_objectConstructor ? (*m_objectConstructor)() : 0; }
+    bool IsDynamic() const { return (NULL != m_objectConstructor); }
 
     const wxChar       *GetClassName() const { return m_className; }
     const wxChar       *GetBaseClassName1() const
@@ -111,7 +98,6 @@ public:
     // Cleans up hash table used for fast searching.
     wxDEPRECATED( static void CleanUpClasses() );
 #endif
-    static void     CleanUp();
 
 public:
     const wxChar            *m_className;
@@ -191,7 +177,7 @@ inline void wxClassInfo::CleanUpClasses() {}
     wxIMPLEMENT_CLASS_COMMON(name, basename, NULL, func)
 
 #define wxIMPLEMENT_CLASS_COMMON2(name, basename1, basename2, func)           \
-    wxIMPLEMENT_CLASS_COMMON(name, basename1, &basename2::ms_classInfo)
+    wxIMPLEMENT_CLASS_COMMON(name, basename1, &basename2::ms_classInfo, func)
 
 // -----------------------------------
 // for concrete classes
@@ -304,7 +290,11 @@ name##PluginSentinel  m_pluginsentinel;
 // Just seems a bit nicer-looking (pretend it's not a macro)
 #define wxIsKindOf(obj, className) obj->IsKindOf(&className::ms_classInfo)
 
-// to be replaced by dynamic_cast<> in the future
+// this cast does some more checks at compile time as it uses static_cast
+// internally
+//
+// note that it still has different semantics from dynamic_cast<> and so can't
+// be replaced by it as long as there are any compilers not supporting it
 #define wxDynamicCast(obj, className) \
     ((className *) wxCheckDynamicCast( \
         wx_const_cast(wxObject *, wx_static_cast(const wxObject *, \
@@ -314,7 +304,7 @@ name##PluginSentinel  m_pluginsentinel;
 // The 'this' pointer is always true, so use this version
 // to cast the this pointer and avoid compiler warnings.
 #define wxDynamicCastThis(className) \
- (IsKindOf(&className::ms_classInfo) ? (className *)(this) : (className *)0)
+     (IsKindOf(&className::ms_classInfo) ? (className *)(this) : (className *)0)
 
 #ifdef __WXDEBUG__
 inline void* wxCheckCast(void *ptr)
@@ -326,7 +316,8 @@ inline void* wxCheckCast(void *ptr)
  ((className *)wxCheckCast(wxDynamicCast(obj, className)))
 
 #else  // !__WXDEBUG__
-#define wxStaticCast(obj, className) ((className *)(obj))
+#define wxStaticCast(obj, className) \
+    wx_const_cast(className *, wx_static_cast(const className *, obj))
 
 #endif  // __WXDEBUG__
 
@@ -386,7 +377,25 @@ inline void* wxCheckCast(void *ptr)
 
 #endif // wxUSE_ARRAY_MEMORY_OPERATORS
 
-#endif // WXDEBUG && wxUSE_MEMORY_TRACING
+#endif // __WXDEBUG__ && wxUSE_MEMORY_TRACING
+
+// ----------------------------------------------------------------------------
+// wxObjectRefData: ref counted data meant to be stored in wxObject
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxObjectRefData
+{
+    friend class WXDLLIMPEXP_BASE wxObject;
+
+public:
+    wxObjectRefData() : m_count(1) { }
+    virtual ~wxObjectRefData() { }
+
+    int GetRefCount() const { return m_count; }
+
+private:
+    int m_count;
+};
 
 // ----------------------------------------------------------------------------
 // wxObject: the root class of wxWidgets object hierarchy
@@ -396,24 +405,22 @@ class WXDLLIMPEXP_BASE wxObject
 {
     DECLARE_ABSTRACT_CLASS(wxObject)
 
-private:
-    void InitFrom(const wxObject& other);
-
 public:
     wxObject() { m_refData = NULL; }
     virtual ~wxObject() { UnRef(); }
 
     wxObject(const wxObject& other)
-        {
-            InitFrom(other);
-        }
+    {
+         m_refData = other.m_refData;
+         if (m_refData)
+             m_refData->m_count++;
+    }
 
     wxObject& operator=(const wxObject& other)
     {
         if ( this != &other )
         {
-            UnRef();
-            InitFrom(other);
+            Ref(other);
         }
         return *this;
     }
@@ -463,13 +470,16 @@ public:
     // destroy a reference
     void UnRef();
 
+    // Make sure this object has only one reference
+    void UnShare() { AllocExclusive(); }
+
 protected:
     // ensure that our data is not shared with anybody else: if we have no
     // data, it is created using CreateRefData() below, if we have shared data
     // it is copied using CloneRefData(), otherwise nothing is done
     void AllocExclusive();
 
-    // both methods must be implemented if Unshare() is used, not pure virtual
+    // both methods must be implemented if AllocExclusive() is used, not pure virtual
     // only because of the backwards compatibility reasons
 
     // create a new m_refData
@@ -481,25 +491,6 @@ protected:
     wxObjectRefData *m_refData;
 };
 
-// ----------------------------------------------------------------------------
-// wxObjectRefData: ref counted data meant to be stored in wxObject
-// ----------------------------------------------------------------------------
-
-class WXDLLIMPEXP_BASE wxObjectRefData
-{
-    friend class WXDLLIMPEXP_BASE wxObject;
-
-public:
-    wxObjectRefData() : m_count(1) { }
-    virtual ~wxObjectRefData() { }
-
-    int GetRefCount() const { return m_count; }
-
-private:
-    int m_count;
-};
-
-
 inline wxObject *wxCheckDynamicCast(wxObject *obj, wxClassInfo *classInfo)
 {
     return obj && obj->GetClassInfo()->IsKindOf(classInfo) ? obj : NULL;
@@ -512,7 +503,7 @@ class WXDLLIMPEXP_BASE wxDynamicObject : public wxObject
 public:
     // instantiates this object with an instance of its superclass
     wxDynamicObject(wxObject* superClassInstance, const wxDynamicClassInfo *info) ;
-    ~wxDynamicObject();
+    virtual ~wxDynamicObject();
 
     void SetProperty (const wxChar *propertyName, const wxxVariant &value);
     wxxVariant GetProperty (const wxChar *propertyName) const ;
@@ -568,5 +559,4 @@ private :
     #include "wx/msw/msvcrt.h"
 #endif
 
-#endif  // _WX_OBJECTH__
-
+#endif // _WX_OBJECTH__