/////////////////////////////////////////////////////////////////////////////
-// Name: variant.h
+// Name: wx/variant.h
// Purpose: wxVariant class, container for any type
// Author: Julian Smart
// Modified by:
// Created: 10/09/98
// RCS-ID: $Id$
-// Copyright: (c)
-// Licence: wxWindows licence
+// Copyright: (c) Julian Smart
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_VARIANT_H_
#define _WX_VARIANT_H_
-#ifdef __GNUG__
-#pragma interface "variant.h"
-#endif
-
#include "wx/defs.h"
+
+#if wxUSE_VARIANT
+
#include "wx/object.h"
#include "wx/string.h"
+#include "wx/arrstr.h"
#include "wx/list.h"
-#if USE_IOSTREAMH
-#include <iostream.h>
-#else
-#include <iostream>
-#endif
+#if wxUSE_DATETIME
+ #include "wx/datetime.h"
+#endif // wxUSE_DATETIME
+
+#if wxUSE_ODBC
+ #include "wx/db.h" // will #include sqltypes.h
+#endif //ODBC
+
+#include "wx/iosfwrap.h"
/*
* wxVariantData stores the actual data in a wxVariant object,
* to allow it to store any type of data.
* Derive from this to provide custom data handling.
*
+ * NB: To prevent addition of extra vtbl pointer to wxVariantData,
+ * we don't multiple-inherit from wxObjectRefData. Instead,
+ * we simply replicate the wxObject ref-counting scheme.
+ *
+ * NB: When you construct a wxVariantData, it will have refcount
+ * of one. Refcount will not be further increased when
+ * it is passed to wxVariant. This simulates old common
+ * scenario where wxVariant took ownership of wxVariantData
+ * passed to it.
+ * If you create wxVariantData for other reasons than passing
+ * it to wxVariant, technically you are not required to call
+ * DecRef() before deleting it.
+ *
* TODO: in order to replace wxPropertyValue, we would need
* to consider adding constructors that take pointers to C++ variables,
* or removing that functionality from the wxProperty library.
* overloading wxVariant with unnecessary functionality.
*/
-class WXDLLEXPORT wxVariantData: public wxObject
+class WXDLLIMPEXP_BASE wxVariantData: public wxObject
{
-DECLARE_ABSTRACT_CLASS(wxVariantData)
+ friend class wxVariant;
public:
+ wxVariantData()
+ : wxObject(), m_count(1)
+ { }
-// Construction & destruction
- wxVariantData() {};
-
-// Override these to provide common functionality
- // Copy to data
- virtual void Copy(wxVariantData& data) = 0;
+ // Override these to provide common functionality
virtual bool Eq(wxVariantData& data) const = 0;
- virtual bool Write(ostream& str) const = 0;
- virtual bool Write(wxString& str) const = 0;
- virtual bool Read(istream& str) = 0;
- virtual bool Read(wxString& str) = 0;
+
+#if wxUSE_STD_IOSTREAM
+ virtual bool Write(wxSTD ostream& str) const { return false; }
+#endif
+ virtual bool Write(wxString& str) const { return false; }
+#if wxUSE_STD_IOSTREAM
+ virtual bool Read(wxSTD istream& str) { return false; }
+#endif
+ virtual bool Read(wxString& str) { return false; }
// 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; }
+
+ void IncRef() { m_count++; }
+ void DecRef()
+ {
+ if ( --m_count == 0 )
+ delete this;
+ }
+
+ int GetRefCount() const { return m_count; }
+
+protected:
+ // Protected dtor should make some incompatible code
+ // break more louder. That is, they should do data->DecRef()
+ // instead of delete data.
+ virtual ~wxVariantData() { }
+
+private:
+ int m_count;
+
+private:
+ DECLARE_ABSTRACT_CLASS(wxVariantData)
};
/*
* wxVariant can store any kind of data, but has some basic types
* built in.
- * NOTE: this eventually should have a reference-counting implementation.
- * PLEASE, if you change it to ref-counting, make sure it doesn't involve bloating
- * this class too much.
*/
-class WXDLLEXPORT wxVariant: public wxObject
+class WXDLLIMPEXP_BASE wxVariant: public wxObject
{
-DECLARE_DYNAMIC_CLASS(wxVariant)
public:
-
-// Construction & destruction
wxVariant();
- wxVariant(double val);
- wxVariant(long val);
- wxVariant(bool val);
- wxVariant(char val);
- wxVariant(const wxString& val);
- wxVariant(const char* val); // Necessary or VC++ assumes bool!
-/* Causes ambiguity
- wxVariant(const wxStringList& val);
-*/
- wxVariant(const wxList& val); // List of variants
+
wxVariant(const wxVariant& variant);
- wxVariant(wxVariantData* data); // User-defined data
- ~wxVariant();
+ wxVariant(wxVariantData* data, const wxString& name = wxEmptyString);
+ virtual ~wxVariant();
-// Generic operators
- // Assignment
+ // generic assignment
void operator= (const wxVariant& variant);
// Assignment using data, e.g.
// myVariant = new wxStringVariantData("hello");
void operator= (wxVariantData* variantData);
+
bool operator== (const wxVariant& variant) const;
bool operator!= (const wxVariant& variant) const;
-// Specific operators
+ // Sets/gets name
+ inline void SetName(const wxString& name) { m_name = name; }
+ inline const wxString& GetName() const { return m_name; }
+
+ // Tests whether there is data
+ bool IsNull() const;
+
+ // For compatibility with wxWidgets <= 2.6, this doesn't increase
+ // reference count.
+ wxVariantData* GetData() const { return m_data; }
+ void SetData(wxVariantData* data) ;
+
+ // make a 'clone' of the object
+ void Ref(const wxVariant& clone);
+
+ // destroy a reference
+ void UnRef();
+
+ // Make NULL (i.e. delete the data)
+ void MakeNull();
+
+ // Delete data and name
+ void Clear();
+
+ // Returns a string representing the type of the variant,
+ // e.g. "string", "bool", "stringlist", "list", "double", "long"
+ wxString GetType() const;
+
+ bool IsType(const wxString& type) const;
+ bool IsValueKindOf(const wxClassInfo* type) const;
+
+ // write contents to a string (e.g. for debugging)
+ wxString MakeString() const;
+
+ // double
+ wxVariant(double val, const wxString& name = wxEmptyString);
bool operator== (double value) const;
bool operator!= (double value) const;
void operator= (double value) ;
+ inline operator double () const { return GetDouble(); }
+ inline double GetReal() const { return GetDouble(); }
+ double GetDouble() const;
+
+ // long
+ wxVariant(long val, const wxString& name = wxEmptyString);
+ wxVariant(int val, const wxString& name = wxEmptyString);
+ wxVariant(short val, const wxString& name = wxEmptyString);
bool operator== (long value) const;
bool operator!= (long value) const;
void operator= (long value) ;
- bool operator== (char value) const;
- bool operator!= (char value) const;
- void operator= (char value) ;
+ inline operator long () const { return GetLong(); }
+ inline long GetInteger() const { return GetLong(); }
+ long GetLong() const;
+
+ // bool
+#ifdef HAVE_BOOL
+ wxVariant(bool val, const wxString& name = wxEmptyString);
bool operator== (bool value) const;
bool operator!= (bool value) const;
void operator= (bool value) ;
+ inline operator bool () const { return GetBool(); }
+ bool GetBool() const ;
+#endif
+
+ // wxDateTime
+#if wxUSE_DATETIME
+ wxVariant(const wxDateTime& val, const wxString& name = wxEmptyString);
+#if wxUSE_ODBC
+ wxVariant(const DATE_STRUCT* valptr, const wxString& name = wxEmptyString);
+ wxVariant(const TIME_STRUCT* valptr, const wxString& name = wxEmptyString);
+ wxVariant(const TIMESTAMP_STRUCT* valptr, const wxString& name = wxEmptyString);
+#endif
+ bool operator== (const wxDateTime& value) const;
+ bool operator!= (const wxDateTime& value) const;
+ void operator= (const wxDateTime& value) ;
+#if wxUSE_ODBC
+ void operator= (const DATE_STRUCT* value) ;
+ void operator= (const TIME_STRUCT* value) ;
+ void operator= (const TIMESTAMP_STRUCT* value) ;
+#endif
+ inline operator wxDateTime () const { return GetDateTime(); }
+ wxDateTime GetDateTime() const;
+#endif
+
+ // wxString
+ wxVariant(const wxString& val, const wxString& name = wxEmptyString);
+ wxVariant(const wxChar* val, const wxString& name = wxEmptyString); // Necessary or VC++ assumes bool!
bool operator== (const wxString& value) const;
bool operator!= (const wxString& value) const;
void operator= (const wxString& value) ;
- void operator= (const char* value) ; // Necessary or VC++ assumes bool!
- bool operator== (const wxStringList& value) const;
- bool operator!= (const wxStringList& value) const;
- void operator= (const wxStringList& value) ;
+ void operator= (const wxChar* value) ; // Necessary or VC++ assumes bool!
+ inline operator wxString () const { return MakeString(); }
+ wxString GetString() const;
+
+ // wxChar
+ wxVariant(wxChar val, const wxString& name = wxEmptyString);
+ bool operator== (wxChar value) const;
+ bool operator!= (wxChar value) const;
+ void operator= (wxChar value) ;
+ inline operator wxChar () const { return GetChar(); }
+ wxChar GetChar() const ;
+
+ // wxArrayString
+ wxVariant(const wxArrayString& val, const wxString& name = wxEmptyString);
+ bool operator== (const wxArrayString& value) const;
+ bool operator!= (const wxArrayString& value) const;
+ void operator= (const wxArrayString& value);
+ inline operator wxArrayString () const { return GetArrayString(); }
+ wxArrayString GetArrayString() const;
+
+ // void*
+ wxVariant(void* ptr, const wxString& name = wxEmptyString);
+ bool operator== (void* value) const;
+ bool operator!= (void* value) const;
+ void operator= (void* value);
+ inline operator void* () const { return GetVoidPtr(); }
+ void* GetVoidPtr() const;
+
+ // wxObject*
+ wxVariant(wxObject* ptr, const wxString& name = wxEmptyString);
+ bool operator== (wxObject* value) const;
+ bool operator!= (wxObject* value) const;
+ void operator= (wxObject* value);
+ wxObject* GetWxObjectPtr() const;
+
+
+#if WXWIN_COMPATIBILITY_2_4
+ wxDEPRECATED( wxVariant(const wxStringList& val, const wxString& name = wxEmptyString) );
+ wxDEPRECATED( bool operator== (const wxStringList& value) const );
+ wxDEPRECATED( bool operator!= (const wxStringList& value) const );
+ wxDEPRECATED( void operator= (const wxStringList& value) );
+ wxDEPRECATED( wxStringList& GetStringList() const );
+#endif
+
+ // ------------------------------
+ // list operations
+ // ------------------------------
+
+ wxVariant(const wxList& val, const wxString& name = wxEmptyString); // List of variants
bool operator== (const wxList& value) const;
bool operator!= (const wxList& value) const;
void operator= (const wxList& value) ;
-
// Treat a list variant as an array
wxVariant operator[] (size_t idx) const;
wxVariant& operator[] (size_t idx) ;
-
- // Implicit conversion to a wxString
- inline operator wxString () const { return MakeString(); }
- wxString MakeString() const;
-
- // Other implicit conversions
- inline operator double () const { return GetDouble(); }
- inline operator long () const { return GetLong(); }
- inline operator bool () const { return GetBool(); }
-
-// Accessors
- // Tests whether there is data
- inline bool IsNull() const { return (m_data == (wxVariantData*) NULL); }
-
- wxVariantData* GetData() const { return m_data; }
- void SetData(wxVariantData* data) ;
-
- // Returns a string representing the type of the variant,
- // e.g. "string", "bool", "stringlist", "list", "double", "long"
- wxString GetType() const;
-
- bool IsType(const wxString& type) const;
-
- // Return the number of elements in a list
- int GetCount() const;
-
-// Value accessors
- double GetReal() const ;
- inline double GetDouble() const { return GetReal(); };
- long GetInteger() const ;
- inline long GetLong() const { return GetInteger(); };
- char GetChar() const ;
- bool GetBool() const ;
- wxString GetString() const ;
wxList& GetList() const ;
- wxStringList& GetStringList() const ;
-
-// Operations
- // Make NULL (i.e. delete the data)
- void MakeNull();
+ // Return the number of elements in a list
+ size_t GetCount() const;
+
// Make empty list
void NullList();
// Insert at front of list
void Insert(const wxVariant& value);
- // Returns TRUE if the variant is a member of the list
+ // Returns true if the variant is a member of the list
bool Member(const wxVariant& value) const;
// Deletes the nth element of the list
- bool Delete(int item);
+ bool Delete(size_t item);
// Clear list
void ClearList();
-// Type conversion
+public:
+ // Type conversion
bool Convert(long* value) const;
bool Convert(bool* value) const;
bool Convert(double* value) const;
bool Convert(wxString* value) const;
bool Convert(char* value) const;
+#if wxUSE_DATETIME
+ bool Convert(wxDateTime* value) const;
+#endif // wxUSE_DATETIME
// Attributes
protected:
wxVariantData* m_data;
+ wxString m_name;
+
+private:
+ DECLARE_DYNAMIC_CLASS(wxVariant)
};
-#endif
- // _WX_VARIANT_H_
+//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 // wxUSE_VARIANT
+
+#endif // _WX_VARIANT_H_
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