Define wxUSE_CAIRO in wx/chkconf.h to ensure that it's always defined.

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

diff --git a/include/wx/any.h b/include/wx/any.h
index c021ce65c7fcc3688d7ecdfdf7c9377d4030fa96..b99e84bb99ae987a5caf0d942eb5f576f69cde4c 100644 (file)
--- a/include/wx/any.h
+++ b/include/wx/any.h
@@ -19,6 +19,7 @@
 #include "wx/string.h"
 #include "wx/meta/movable.h"
 #include "wx/meta/if.h"
+#include "wx/typeinfo.h"
 
 
 // Size of the wxAny value buffer.
@@ -29,17 +30,20 @@ enum
 
 union wxAnyValueBuffer
 {
+    union Alignment
+    {
+    #if wxHAS_INT64
+        wxInt64 m_int64;
+    #endif
+        long double m_longDouble;
+        void ( *m_funcPtr )(void);
+        void ( wxAnyValueBuffer::*m_mFuncPtr )(void);
+    } m_alignment;
+
     void*   m_ptr;
-#if wxHAS_INT64
-    wxInt64 m_int64;
-#endif
-    double  m_double;
     wxByte  m_buffer[WX_ANY_VALUE_BUFFER_SIZE];
 };
 
-typedef void (*wxAnyClassInfo)();
-
-
 //
 // wxAnyValueType is base class for value type functionality for C++ data
 // types used with wxAny. Usually the default template (wxAnyValueTypeImpl<>)
@@ -47,6 +51,7 @@ typedef void (*wxAnyClassInfo)();
 //
 class WXDLLIMPEXP_BASE wxAnyValueType
 {
+    WX_DECLARE_ABSTRACT_TYPEINFO(wxAnyValueType)
 public:
     /**
         Default constructor.
@@ -60,11 +65,6 @@ public:
     {
     }
 
-    /**
-        This function is used for internal type matching.
-    */
-    virtual wxAnyClassInfo GetClassInfo() const = 0;
-
     /**
         This function is used for internal type matching.
     */
@@ -77,9 +77,14 @@ public:
     virtual void DeleteValue(wxAnyValueBuffer& buf) const = 0;
 
     /**
-        Implement this for buffer-to-buffer copy. src.m_ptr can
-        be expected to be NULL if value type of previously stored
-        data was different.
+        Implement this for buffer-to-buffer copy.
+
+        @param src
+            This is the source data buffer.
+
+        @param dst
+            This is the destination data buffer that is in either
+            uninitialized or freed state.
     */
     virtual void CopyBuffer(const wxAnyValueBuffer& src,
                             wxAnyValueBuffer& dst) const = 0;
@@ -114,28 +119,22 @@ private:
 #define wxANY_VALUE_TYPE_CHECK_TYPE(valueTypePtr, T) \
     wxAnyValueTypeImpl<T>::IsSameClass(valueTypePtr)
 
-    //valueTypePtr->CheckType(static_cast<T*>(NULL))
-
 
 /**
     Helper macro for defining user value types.
 
-    NB: We really cannot compare sm_classInfo directly in IsSameClass(),
-        but instead call sm_instance->GetClassInfo(). The former technique
-        broke at least on GCC 4.2 (but worked on VC8 shared build).
+    Even though C++ RTTI would be fully available to use, we'd have to to
+    facilitate sub-type system which allows, for instance, wxAny with
+    signed short '15' to be treated equal to wxAny with signed long long '15'.
+    Having sm_instance is important here.
 */
 #define WX_DECLARE_ANY_VALUE_TYPE(CLS) \
     friend class wxAny; \
+    WX_DECLARE_TYPEINFO_INLINE(CLS) \
 public: \
-    static void sm_classInfo() {} \
- \
-    virtual wxAnyClassInfo GetClassInfo() const \
-    { \
-        return sm_classInfo; \
-    } \
     static bool IsSameClass(const wxAnyValueType* otherType) \
     { \
-        return sm_instance->GetClassInfo() == otherType->GetClassInfo(); \
+        return wxTypeId(*sm_instance) == wxTypeId(*otherType); \
     } \
     virtual bool IsSameType(const wxAnyValueType* otherType) const \
     { \
@@ -253,13 +252,11 @@ public:
     virtual void DeleteValue(wxAnyValueBuffer& buf) const
     {
         Ops::DeleteValue(buf);
-        buf.m_ptr = NULL;  // This is important
     }
 
     virtual void CopyBuffer(const wxAnyValueBuffer& src,
                             wxAnyValueBuffer& dst) const
     {
-        Ops::DeleteValue(dst);
         Ops::SetValue(Ops::GetValue(src), dst);
     }
 
@@ -470,6 +467,53 @@ WX_ANY_DEFINE_SUB_TYPE(float, Double)
 WX_ANY_DEFINE_SUB_TYPE(double, Double)
 
 
+//
+// Defines a dummy wxAnyValueTypeImpl<> with given export
+// declaration. This is needed if a class is used with
+// wxAny in both user shared library and application.
+//
+#define wxDECLARE_ANY_TYPE(CLS, DECL) \
+template<> \
+class DECL wxAnyValueTypeImpl<CLS> : \
+    public wxAnyValueTypeImplBase<CLS> \
+{ \
+    WX_DECLARE_ANY_VALUE_TYPE(wxAnyValueTypeImpl<CLS>) \
+public: \
+    wxAnyValueTypeImpl() : \
+        wxAnyValueTypeImplBase<CLS>() { } \
+    virtual ~wxAnyValueTypeImpl() { } \
+ \
+    virtual bool ConvertValue(const wxAnyValueBuffer& src, \
+                              wxAnyValueType* dstType, \
+                              wxAnyValueBuffer& dst) const \
+    { \
+        wxUnusedVar(src); \
+        wxUnusedVar(dstType); \
+        wxUnusedVar(dst); \
+        return false; \
+    } \
+};
+
+
+// Make sure some of wx's own types get the right wxAnyValueType export
+// (this is needed only for types that are referred to from wxBase.
+// currently we may not use any of these types from there, but let's
+// use the macro on at least one to make sure it compiles since we can't
+// really test it properly in unittests since a separate DLL would
+// be needed).
+#if wxUSE_DATETIME
+    #include "wx/datetime.h"
+    wxDECLARE_ANY_TYPE(wxDateTime, WXDLLIMPEXP_BASE)
+#endif
+
+//#include "wx/object.h"
+//wxDECLARE_ANY_TYPE(wxObject*, WXDLLIMPEXP_BASE)
+
+//#include "wx/arrstr.h"
+//wxDECLARE_ANY_TYPE(wxArrayString, WXDLLIMPEXP_BASE)
+
+
+
 #ifdef __VISUALC6__
     // Re-enable useless VC6 warnings
     #pragma warning (pop)
@@ -761,12 +805,15 @@ private:
     // Assignment functions
     void AssignAny(const wxAny& any)
     {
-        if ( !any.m_type->IsSameType(m_type) )
-        {
-            m_type->DeleteValue(m_buffer);
-            m_type = any.m_type;
-        }
-        m_type->CopyBuffer(any.m_buffer, m_buffer);
+        // Must delete value - CopyBuffer() never does that
+        m_type->DeleteValue(m_buffer);
+
+        wxAnyValueType* newType = any.m_type;
+
+        if ( !newType->IsSameType(m_type) )
+            m_type = newType;
+
+        newType->CopyBuffer(any.m_buffer, m_buffer);
     }
 
     template<typename T>