Patch from Jed Burgess that optionally allows the grid to notify when

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

diff --git a/include/wx/variant.h b/include/wx/variant.h
index e751dde6c1467b9f9c42490678accf7312af3995..ef70b0e3ae5103a2016403fdb90c1d40be375d4b 100644 (file)
--- a/include/wx/variant.h
+++ b/include/wx/variant.h
@@ -12,13 +12,14 @@
 #ifndef _WX_VARIANT_H_
 #define _WX_VARIANT_H_
 
-#if defined(__GNUG__) && !defined(__APPLE__)
+#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
 #pragma interface "variant.h"
 #endif
 
 #include "wx/defs.h"
 #include "wx/object.h"
 #include "wx/string.h"
+#include "wx/arrstr.h"
 #include "wx/list.h"
 
 #if wxUSE_DATETIME
@@ -45,7 +46,7 @@
  * overloading wxVariant with unnecessary functionality.
  */
 
-class WXDLLEXPORT wxVariantData: public wxObject
+class WXDLLIMPEXP_BASE wxVariantData: public wxObject
 {
 DECLARE_ABSTRACT_CLASS(wxVariantData)
 public:
@@ -67,6 +68,8 @@ public:
     virtual bool Read(wxString& str) = 0;
     // What type is it? Return a string name.
     virtual wxString GetType() const = 0;
+    // If it based on wxObject return the ClassInfo.
+    virtual wxClassInfo* GetValueClassInfo() { return NULL; }
 };
 
 /*
@@ -77,7 +80,7 @@ public:
  * this class too much.
  */
 
-class WXDLLEXPORT wxVariant: public wxObject
+class WXDLLIMPEXP_BASE wxVariant: public wxObject
 {
 DECLARE_DYNAMIC_CLASS(wxVariant)
 public:
@@ -95,6 +98,7 @@ public:
     wxVariant(const wxStringList& val, const wxString& name = wxEmptyString);
     wxVariant(const wxList& val, const wxString& name = wxEmptyString); // List of variants
     wxVariant(void* ptr, const wxString& name = wxEmptyString); // void* (general purpose)
+    wxVariant(wxObject* ptr, const wxString& name = wxEmptyString); //wxObject 
     wxVariant(wxVariantData* data, const wxString& name = wxEmptyString); // User-defined data
 //TODO: Need to document
 #if wxUSE_DATETIME
@@ -181,6 +185,9 @@ public:
     inline operator long () const {  return GetLong(); }
     inline operator bool () const {  return GetBool(); }
     inline operator void* () const {  return GetVoidPtr(); }
+    // No implicit conversion to wxObject, as that would really
+    //  confuse people between conversion to our contained data
+    //  and downcasting to see our base type.
 //TODO: Need to document
 #if wxUSE_DATETIME
     inline operator wxDateTime () const { return GetDateTime(); }
@@ -203,6 +210,7 @@ public:
     wxString GetType() const;
 
     bool IsType(const wxString& type) const;
+    bool IsValueKindOf(const wxClassInfo* type) const;
 
     // Return the number of elements in a list
     int GetCount() const;
@@ -219,6 +227,7 @@ public:
     wxStringList& GetStringList() const ;
 
     void* GetVoidPtr() const ;
+    wxObject* GetWxObjectPtr()  ;
 //TODO: Need to document
 #if wxUSE_DATETIME
     wxDateTime GetDateTime() const ;
@@ -268,7 +277,15 @@ protected:
     wxString        m_name;
 };
 
-extern wxVariant WXDLLEXPORT wxNullVariant;
+//Since we want type safety wxVariant we need to fetch and dynamic_cast
+//in a seemingly safe way so the compiler can check, so we define 
+//a dynamic_cast /wxDynamicCast analogue.
+
+#define wxGetVariantCast(var,classname) \
+       ((classname*)(var.IsValueKindOf(&classname::ms_classInfo) ?\
+                     var.GetWxObjectPtr() : NULL));
+
+extern wxVariant WXDLLIMPEXP_BASE wxNullVariant;
 
 #endif
     // _WX_VARIANT_H_