| 1 | ///////////////////////////////////////////////////////////////////////////// |
| 2 | // Name: wx/variant.h |
| 3 | // Purpose: wxVariant class, container for any type |
| 4 | // Author: Julian Smart |
| 5 | // Modified by: |
| 6 | // Created: 10/09/98 |
| 7 | // RCS-ID: $Id$ |
| 8 | // Copyright: (c) Julian Smart |
| 9 | // Licence: wxWindows licence |
| 10 | ///////////////////////////////////////////////////////////////////////////// |
| 11 | |
| 12 | #ifndef _WX_VARIANT_H_ |
| 13 | #define _WX_VARIANT_H_ |
| 14 | |
| 15 | #include "wx/defs.h" |
| 16 | |
| 17 | #if wxUSE_VARIANT |
| 18 | |
| 19 | #include "wx/object.h" |
| 20 | #include "wx/string.h" |
| 21 | #include "wx/arrstr.h" |
| 22 | #include "wx/list.h" |
| 23 | #include "wx/cpp.h" |
| 24 | #include "wx/longlong.h" |
| 25 | |
| 26 | #if wxUSE_DATETIME |
| 27 | #include "wx/datetime.h" |
| 28 | #endif // wxUSE_DATETIME |
| 29 | |
| 30 | #include "wx/iosfwrap.h" |
| 31 | |
| 32 | class wxAny; |
| 33 | |
| 34 | /* |
| 35 | * wxVariantData stores the actual data in a wxVariant object, |
| 36 | * to allow it to store any type of data. |
| 37 | * Derive from this to provide custom data handling. |
| 38 | * |
| 39 | * NB: When you construct a wxVariantData, it will have refcount |
| 40 | * of one. Refcount will not be further increased when |
| 41 | * it is passed to wxVariant. This simulates old common |
| 42 | * scenario where wxVariant took ownership of wxVariantData |
| 43 | * passed to it. |
| 44 | * If you create wxVariantData for other reasons than passing |
| 45 | * it to wxVariant, technically you are not required to call |
| 46 | * DecRef() before deleting it. |
| 47 | * |
| 48 | * TODO: in order to replace wxPropertyValue, we would need |
| 49 | * to consider adding constructors that take pointers to C++ variables, |
| 50 | * or removing that functionality from the wxProperty library. |
| 51 | * Essentially wxPropertyValue takes on some of the wxValidator functionality |
| 52 | * by storing pointers and not just actual values, allowing update of C++ data |
| 53 | * to be handled automatically. Perhaps there's another way of doing this without |
| 54 | * overloading wxVariant with unnecessary functionality. |
| 55 | */ |
| 56 | |
| 57 | class WXDLLIMPEXP_BASE wxVariantData : public wxObjectRefData |
| 58 | { |
| 59 | friend class wxVariant; |
| 60 | public: |
| 61 | wxVariantData() { } |
| 62 | |
| 63 | // Override these to provide common functionality |
| 64 | virtual bool Eq(wxVariantData& data) const = 0; |
| 65 | |
| 66 | #if wxUSE_STD_IOSTREAM |
| 67 | virtual bool Write(wxSTD ostream& WXUNUSED(str)) const { return false; } |
| 68 | #endif |
| 69 | virtual bool Write(wxString& WXUNUSED(str)) const { return false; } |
| 70 | #if wxUSE_STD_IOSTREAM |
| 71 | virtual bool Read(wxSTD istream& WXUNUSED(str)) { return false; } |
| 72 | #endif |
| 73 | virtual bool Read(wxString& WXUNUSED(str)) { return false; } |
| 74 | // What type is it? Return a string name. |
| 75 | virtual wxString GetType() const = 0; |
| 76 | // If it based on wxObject return the ClassInfo. |
| 77 | virtual wxClassInfo* GetValueClassInfo() { return NULL; } |
| 78 | |
| 79 | // Implement this to make wxVariant::UnShare work. Returns |
| 80 | // a copy of the data. |
| 81 | virtual wxVariantData* Clone() const { return NULL; } |
| 82 | |
| 83 | #if wxUSE_ANY |
| 84 | // Converts value to wxAny, if possible. Return true if successful. |
| 85 | virtual bool GetAsAny(wxAny* WXUNUSED(any)) const { return false; } |
| 86 | #endif |
| 87 | |
| 88 | protected: |
| 89 | // Protected dtor should make some incompatible code |
| 90 | // break more louder. That is, they should do data->DecRef() |
| 91 | // instead of delete data. |
| 92 | virtual ~wxVariantData() { } |
| 93 | }; |
| 94 | |
| 95 | /* |
| 96 | * wxVariant can store any kind of data, but has some basic types |
| 97 | * built in. |
| 98 | */ |
| 99 | |
| 100 | class WXDLLIMPEXP_FWD_BASE wxVariant; |
| 101 | |
| 102 | WX_DECLARE_LIST_WITH_DECL(wxVariant, wxVariantList, class WXDLLIMPEXP_BASE); |
| 103 | |
| 104 | class WXDLLIMPEXP_BASE wxVariant: public wxObject |
| 105 | { |
| 106 | public: |
| 107 | wxVariant(); |
| 108 | |
| 109 | wxVariant(const wxVariant& variant); |
| 110 | wxVariant(wxVariantData* data, const wxString& name = wxEmptyString); |
| 111 | #if wxUSE_ANY |
| 112 | wxVariant(const wxAny& any); |
| 113 | #endif |
| 114 | virtual ~wxVariant(); |
| 115 | |
| 116 | // generic assignment |
| 117 | void operator= (const wxVariant& variant); |
| 118 | |
| 119 | // Assignment using data, e.g. |
| 120 | // myVariant = new wxStringVariantData("hello"); |
| 121 | void operator= (wxVariantData* variantData); |
| 122 | |
| 123 | bool operator== (const wxVariant& variant) const; |
| 124 | bool operator!= (const wxVariant& variant) const; |
| 125 | |
| 126 | // Sets/gets name |
| 127 | inline void SetName(const wxString& name) { m_name = name; } |
| 128 | inline const wxString& GetName() const { return m_name; } |
| 129 | |
| 130 | // Tests whether there is data |
| 131 | bool IsNull() const; |
| 132 | |
| 133 | // For compatibility with wxWidgets <= 2.6, this doesn't increase |
| 134 | // reference count. |
| 135 | wxVariantData* GetData() const |
| 136 | { |
| 137 | return (wxVariantData*) m_refData; |
| 138 | } |
| 139 | void SetData(wxVariantData* data) ; |
| 140 | |
| 141 | // make a 'clone' of the object |
| 142 | void Ref(const wxVariant& clone) { wxObject::Ref(clone); } |
| 143 | |
| 144 | // ensure that the data is exclusive to this variant, and not shared |
| 145 | bool Unshare(); |
| 146 | |
| 147 | // Make NULL (i.e. delete the data) |
| 148 | void MakeNull(); |
| 149 | |
| 150 | // Delete data and name |
| 151 | void Clear(); |
| 152 | |
| 153 | // Returns a string representing the type of the variant, |
| 154 | // e.g. "string", "bool", "stringlist", "list", "double", "long" |
| 155 | wxString GetType() const; |
| 156 | |
| 157 | bool IsType(const wxString& type) const; |
| 158 | bool IsValueKindOf(const wxClassInfo* type) const; |
| 159 | |
| 160 | // write contents to a string (e.g. for debugging) |
| 161 | wxString MakeString() const; |
| 162 | |
| 163 | #if wxUSE_ANY |
| 164 | wxAny GetAny() const; |
| 165 | #endif |
| 166 | |
| 167 | // double |
| 168 | wxVariant(double val, const wxString& name = wxEmptyString); |
| 169 | bool operator== (double value) const; |
| 170 | bool operator!= (double value) const; |
| 171 | void operator= (double value) ; |
| 172 | inline operator double () const { return GetDouble(); } |
| 173 | inline double GetReal() const { return GetDouble(); } |
| 174 | double GetDouble() const; |
| 175 | |
| 176 | // long |
| 177 | wxVariant(long val, const wxString& name = wxEmptyString); |
| 178 | wxVariant(int val, const wxString& name = wxEmptyString); |
| 179 | wxVariant(short val, const wxString& name = wxEmptyString); |
| 180 | bool operator== (long value) const; |
| 181 | bool operator!= (long value) const; |
| 182 | void operator= (long value) ; |
| 183 | inline operator long () const { return GetLong(); } |
| 184 | inline long GetInteger() const { return GetLong(); } |
| 185 | long GetLong() const; |
| 186 | |
| 187 | // bool |
| 188 | wxVariant(bool val, const wxString& name = wxEmptyString); |
| 189 | bool operator== (bool value) const; |
| 190 | bool operator!= (bool value) const; |
| 191 | void operator= (bool value) ; |
| 192 | inline operator bool () const { return GetBool(); } |
| 193 | bool GetBool() const ; |
| 194 | |
| 195 | // wxDateTime |
| 196 | #if wxUSE_DATETIME |
| 197 | wxVariant(const wxDateTime& val, const wxString& name = wxEmptyString); |
| 198 | bool operator== (const wxDateTime& value) const; |
| 199 | bool operator!= (const wxDateTime& value) const; |
| 200 | void operator= (const wxDateTime& value) ; |
| 201 | inline operator wxDateTime () const { return GetDateTime(); } |
| 202 | wxDateTime GetDateTime() const; |
| 203 | #endif |
| 204 | |
| 205 | // wxString |
| 206 | wxVariant(const wxString& val, const wxString& name = wxEmptyString); |
| 207 | // these overloads are necessary to prevent the compiler from using bool |
| 208 | // version instead of wxString one: |
| 209 | wxVariant(const char* val, const wxString& name = wxEmptyString); |
| 210 | wxVariant(const wchar_t* val, const wxString& name = wxEmptyString); |
| 211 | wxVariant(const wxCStrData& val, const wxString& name = wxEmptyString); |
| 212 | wxVariant(const wxScopedCharBuffer& val, const wxString& name = wxEmptyString); |
| 213 | wxVariant(const wxScopedWCharBuffer& val, const wxString& name = wxEmptyString); |
| 214 | |
| 215 | bool operator== (const wxString& value) const; |
| 216 | bool operator!= (const wxString& value) const; |
| 217 | wxVariant& operator=(const wxString& value); |
| 218 | // these overloads are necessary to prevent the compiler from using bool |
| 219 | // version instead of wxString one: |
| 220 | wxVariant& operator=(const char* value) |
| 221 | { return *this = wxString(value); } |
| 222 | wxVariant& operator=(const wchar_t* value) |
| 223 | { return *this = wxString(value); } |
| 224 | wxVariant& operator=(const wxCStrData& value) |
| 225 | { return *this = value.AsString(); } |
| 226 | template<typename T> |
| 227 | wxVariant& operator=(const wxScopedCharTypeBuffer<T>& value) |
| 228 | { return *this = value.data(); } |
| 229 | |
| 230 | inline operator wxString () const { return MakeString(); } |
| 231 | wxString GetString() const; |
| 232 | |
| 233 | #if wxUSE_STD_STRING |
| 234 | wxVariant(const std::string& val, const wxString& name = wxEmptyString); |
| 235 | bool operator==(const std::string& value) const |
| 236 | { return operator==(wxString(value)); } |
| 237 | bool operator!=(const std::string& value) const |
| 238 | { return operator!=(wxString(value)); } |
| 239 | wxVariant& operator=(const std::string& value) |
| 240 | { return operator=(wxString(value)); } |
| 241 | operator std::string() const { return (operator wxString()).ToStdString(); } |
| 242 | |
| 243 | wxVariant(const wxStdWideString& val, const wxString& name = wxEmptyString); |
| 244 | bool operator==(const wxStdWideString& value) const |
| 245 | { return operator==(wxString(value)); } |
| 246 | bool operator!=(const wxStdWideString& value) const |
| 247 | { return operator!=(wxString(value)); } |
| 248 | wxVariant& operator=(const wxStdWideString& value) |
| 249 | { return operator=(wxString(value)); } |
| 250 | operator wxStdWideString() const { return (operator wxString()).ToStdWstring(); } |
| 251 | #endif // wxUSE_STD_STRING |
| 252 | |
| 253 | // wxUniChar |
| 254 | wxVariant(const wxUniChar& val, const wxString& name = wxEmptyString); |
| 255 | wxVariant(const wxUniCharRef& val, const wxString& name = wxEmptyString); |
| 256 | wxVariant(char val, const wxString& name = wxEmptyString); |
| 257 | wxVariant(wchar_t val, const wxString& name = wxEmptyString); |
| 258 | bool operator==(const wxUniChar& value) const; |
| 259 | bool operator==(const wxUniCharRef& value) const { return *this == wxUniChar(value); } |
| 260 | bool operator==(char value) const { return *this == wxUniChar(value); } |
| 261 | bool operator==(wchar_t value) const { return *this == wxUniChar(value); } |
| 262 | bool operator!=(const wxUniChar& value) const { return !(*this == value); } |
| 263 | bool operator!=(const wxUniCharRef& value) const { return !(*this == value); } |
| 264 | bool operator!=(char value) const { return !(*this == value); } |
| 265 | bool operator!=(wchar_t value) const { return !(*this == value); } |
| 266 | wxVariant& operator=(const wxUniChar& value); |
| 267 | wxVariant& operator=(const wxUniCharRef& value) { return *this = wxUniChar(value); } |
| 268 | wxVariant& operator=(char value) { return *this = wxUniChar(value); } |
| 269 | wxVariant& operator=(wchar_t value) { return *this = wxUniChar(value); } |
| 270 | operator wxUniChar() const { return GetChar(); } |
| 271 | operator char() const { return GetChar(); } |
| 272 | operator wchar_t() const { return GetChar(); } |
| 273 | wxUniChar GetChar() const; |
| 274 | |
| 275 | // wxArrayString |
| 276 | wxVariant(const wxArrayString& val, const wxString& name = wxEmptyString); |
| 277 | bool operator== (const wxArrayString& value) const; |
| 278 | bool operator!= (const wxArrayString& value) const; |
| 279 | void operator= (const wxArrayString& value); |
| 280 | operator wxArrayString () const { return GetArrayString(); } |
| 281 | wxArrayString GetArrayString() const; |
| 282 | |
| 283 | // void* |
| 284 | wxVariant(void* ptr, const wxString& name = wxEmptyString); |
| 285 | bool operator== (void* value) const; |
| 286 | bool operator!= (void* value) const; |
| 287 | void operator= (void* value); |
| 288 | operator void* () const { return GetVoidPtr(); } |
| 289 | void* GetVoidPtr() const; |
| 290 | |
| 291 | // wxObject* |
| 292 | wxVariant(wxObject* ptr, const wxString& name = wxEmptyString); |
| 293 | bool operator== (wxObject* value) const; |
| 294 | bool operator!= (wxObject* value) const; |
| 295 | void operator= (wxObject* value); |
| 296 | wxObject* GetWxObjectPtr() const; |
| 297 | |
| 298 | #if wxUSE_LONGLONG |
| 299 | // wxLongLong |
| 300 | wxVariant(wxLongLong, const wxString& name = wxEmptyString); |
| 301 | bool operator==(wxLongLong value) const; |
| 302 | bool operator!=(wxLongLong value) const; |
| 303 | void operator=(wxLongLong value); |
| 304 | operator wxLongLong() const { return GetLongLong(); } |
| 305 | wxLongLong GetLongLong() const; |
| 306 | |
| 307 | // wxULongLong |
| 308 | wxVariant(wxULongLong, const wxString& name = wxEmptyString); |
| 309 | bool operator==(wxULongLong value) const; |
| 310 | bool operator!=(wxULongLong value) const; |
| 311 | void operator=(wxULongLong value); |
| 312 | operator wxULongLong() const { return GetULongLong(); } |
| 313 | wxULongLong GetULongLong() const; |
| 314 | #endif |
| 315 | |
| 316 | // ------------------------------ |
| 317 | // list operations |
| 318 | // ------------------------------ |
| 319 | |
| 320 | wxVariant(const wxVariantList& val, const wxString& name = wxEmptyString); // List of variants |
| 321 | bool operator== (const wxVariantList& value) const; |
| 322 | bool operator!= (const wxVariantList& value) const; |
| 323 | void operator= (const wxVariantList& value) ; |
| 324 | // Treat a list variant as an array |
| 325 | wxVariant operator[] (size_t idx) const; |
| 326 | wxVariant& operator[] (size_t idx) ; |
| 327 | wxVariantList& GetList() const ; |
| 328 | |
| 329 | // Return the number of elements in a list |
| 330 | size_t GetCount() const; |
| 331 | |
| 332 | // Make empty list |
| 333 | void NullList(); |
| 334 | |
| 335 | // Append to list |
| 336 | void Append(const wxVariant& value); |
| 337 | |
| 338 | // Insert at front of list |
| 339 | void Insert(const wxVariant& value); |
| 340 | |
| 341 | // Returns true if the variant is a member of the list |
| 342 | bool Member(const wxVariant& value) const; |
| 343 | |
| 344 | // Deletes the nth element of the list |
| 345 | bool Delete(size_t item); |
| 346 | |
| 347 | // Clear list |
| 348 | void ClearList(); |
| 349 | |
| 350 | public: |
| 351 | // Type conversion |
| 352 | bool Convert(long* value) const; |
| 353 | bool Convert(bool* value) const; |
| 354 | bool Convert(double* value) const; |
| 355 | bool Convert(wxString* value) const; |
| 356 | bool Convert(wxUniChar* value) const; |
| 357 | bool Convert(char* value) const; |
| 358 | bool Convert(wchar_t* value) const; |
| 359 | #if wxUSE_DATETIME |
| 360 | bool Convert(wxDateTime* value) const; |
| 361 | #endif // wxUSE_DATETIME |
| 362 | #if wxUSE_LONGLONG |
| 363 | bool Convert(wxLongLong* value) const; |
| 364 | bool Convert(wxULongLong* value) const; |
| 365 | #ifdef wxLongLong_t |
| 366 | bool Convert(wxLongLong_t* value) const |
| 367 | { |
| 368 | wxLongLong temp; |
| 369 | if ( !Convert(&temp) ) |
| 370 | return false; |
| 371 | *value = temp.GetValue(); |
| 372 | return true; |
| 373 | } |
| 374 | bool Convert(wxULongLong_t* value) const |
| 375 | { |
| 376 | wxULongLong temp; |
| 377 | if ( !Convert(&temp) ) |
| 378 | return false; |
| 379 | *value = temp.GetValue(); |
| 380 | return true; |
| 381 | } |
| 382 | #endif // wxLongLong_t |
| 383 | #endif // wxUSE_LONGLONG |
| 384 | |
| 385 | // Attributes |
| 386 | protected: |
| 387 | virtual wxObjectRefData *CreateRefData() const; |
| 388 | virtual wxObjectRefData *CloneRefData(const wxObjectRefData *data) const; |
| 389 | |
| 390 | wxString m_name; |
| 391 | |
| 392 | private: |
| 393 | DECLARE_DYNAMIC_CLASS(wxVariant) |
| 394 | }; |
| 395 | |
| 396 | |
| 397 | // |
| 398 | // wxVariant <-> wxAny conversion code |
| 399 | // |
| 400 | #if wxUSE_ANY |
| 401 | |
| 402 | #include "wx/any.h" |
| 403 | |
| 404 | // In order to convert wxAny to wxVariant, we need to be able to associate |
| 405 | // wxAnyValueType with a wxVariantData factory function. |
| 406 | typedef wxVariantData* (*wxVariantDataFactory)(const wxAny& any); |
| 407 | |
| 408 | // Actual Any-to-Variant registration must be postponed to a time when all |
| 409 | // global variables have been initialized. Hence this arrangement. |
| 410 | // wxAnyToVariantRegistration instances are kept in global scope and |
| 411 | // wxAnyValueTypeGlobals in any.cpp will use their data when the time is |
| 412 | // right. |
| 413 | class WXDLLIMPEXP_BASE wxAnyToVariantRegistration |
| 414 | { |
| 415 | public: |
| 416 | wxAnyToVariantRegistration(wxVariantDataFactory factory); |
| 417 | virtual ~wxAnyToVariantRegistration(); |
| 418 | |
| 419 | virtual wxAnyValueType* GetAssociatedType() = 0; |
| 420 | wxVariantDataFactory GetFactory() const { return m_factory; } |
| 421 | private: |
| 422 | wxVariantDataFactory m_factory; |
| 423 | }; |
| 424 | |
| 425 | template<typename T> |
| 426 | class wxAnyToVariantRegistrationImpl : public wxAnyToVariantRegistration |
| 427 | { |
| 428 | public: |
| 429 | wxAnyToVariantRegistrationImpl(wxVariantDataFactory factory) |
| 430 | : wxAnyToVariantRegistration(factory) |
| 431 | { |
| 432 | } |
| 433 | |
| 434 | virtual wxAnyValueType* GetAssociatedType() |
| 435 | { |
| 436 | return wxAnyValueTypeImpl<T>::GetInstance(); |
| 437 | } |
| 438 | private: |
| 439 | }; |
| 440 | |
| 441 | #define DECLARE_WXANY_CONVERSION() \ |
| 442 | virtual bool GetAsAny(wxAny* any) const; \ |
| 443 | static wxVariantData* VariantDataFactory(const wxAny& any); |
| 444 | |
| 445 | #define _REGISTER_WXANY_CONVERSION(T, CLASSNAME, FUNC) \ |
| 446 | static wxAnyToVariantRegistrationImpl<T> \ |
| 447 | gs_##CLASSNAME##AnyToVariantRegistration = \ |
| 448 | wxAnyToVariantRegistrationImpl<T>(&FUNC); |
| 449 | |
| 450 | #define REGISTER_WXANY_CONVERSION(T, CLASSNAME) \ |
| 451 | _REGISTER_WXANY_CONVERSION(T, CLASSNAME, CLASSNAME::VariantDataFactory) |
| 452 | |
| 453 | #define IMPLEMENT_TRIVIAL_WXANY_CONVERSION(T, CLASSNAME) \ |
| 454 | bool CLASSNAME::GetAsAny(wxAny* any) const \ |
| 455 | { \ |
| 456 | *any = m_value; \ |
| 457 | return true; \ |
| 458 | } \ |
| 459 | wxVariantData* CLASSNAME::VariantDataFactory(const wxAny& any) \ |
| 460 | { \ |
| 461 | return new CLASSNAME(wxANY_AS(any, T)); \ |
| 462 | } \ |
| 463 | REGISTER_WXANY_CONVERSION(T, CLASSNAME) |
| 464 | |
| 465 | #else // if !wxUSE_ANY |
| 466 | |
| 467 | #define DECLARE_WXANY_CONVERSION() |
| 468 | #define REGISTER_WXANY_CONVERSION(T, CLASSNAME) |
| 469 | #define IMPLEMENT_TRIVIAL_WXANY_CONVERSION(T, CLASSNAME) |
| 470 | |
| 471 | #endif // wxUSE_ANY/!wxUSE_ANY |
| 472 | |
| 473 | |
| 474 | #define DECLARE_VARIANT_OBJECT(classname) \ |
| 475 | DECLARE_VARIANT_OBJECT_EXPORTED(classname, wxEMPTY_PARAMETER_VALUE) |
| 476 | |
| 477 | #define DECLARE_VARIANT_OBJECT_EXPORTED(classname,expdecl) \ |
| 478 | expdecl classname& operator << ( classname &object, const wxVariant &variant ); \ |
| 479 | expdecl wxVariant& operator << ( wxVariant &variant, const classname &object ); |
| 480 | |
| 481 | #define IMPLEMENT_VARIANT_OBJECT(classname) \ |
| 482 | IMPLEMENT_VARIANT_OBJECT_EXPORTED(classname, wxEMPTY_PARAMETER_VALUE) |
| 483 | |
| 484 | #define IMPLEMENT_VARIANT_OBJECT_EXPORTED_NO_EQ(classname,expdecl) \ |
| 485 | class classname##VariantData: public wxVariantData \ |
| 486 | { \ |
| 487 | public:\ |
| 488 | classname##VariantData() {} \ |
| 489 | classname##VariantData( const classname &value ) { m_value = value; } \ |
| 490 | \ |
| 491 | classname &GetValue() { return m_value; } \ |
| 492 | \ |
| 493 | virtual bool Eq(wxVariantData& data) const; \ |
| 494 | \ |
| 495 | virtual wxString GetType() const; \ |
| 496 | virtual wxClassInfo* GetValueClassInfo(); \ |
| 497 | \ |
| 498 | virtual wxVariantData* Clone() const { return new classname##VariantData(m_value); } \ |
| 499 | \ |
| 500 | DECLARE_WXANY_CONVERSION() \ |
| 501 | protected:\ |
| 502 | classname m_value; \ |
| 503 | };\ |
| 504 | \ |
| 505 | wxString classname##VariantData::GetType() const\ |
| 506 | {\ |
| 507 | return m_value.GetClassInfo()->GetClassName();\ |
| 508 | }\ |
| 509 | \ |
| 510 | wxClassInfo* classname##VariantData::GetValueClassInfo()\ |
| 511 | {\ |
| 512 | return m_value.GetClassInfo();\ |
| 513 | }\ |
| 514 | \ |
| 515 | expdecl classname& operator << ( classname &value, const wxVariant &variant )\ |
| 516 | {\ |
| 517 | wxASSERT( variant.GetType() == #classname );\ |
| 518 | \ |
| 519 | classname##VariantData *data = (classname##VariantData*) variant.GetData();\ |
| 520 | value = data->GetValue();\ |
| 521 | return value;\ |
| 522 | }\ |
| 523 | \ |
| 524 | expdecl wxVariant& operator << ( wxVariant &variant, const classname &value )\ |
| 525 | {\ |
| 526 | classname##VariantData *data = new classname##VariantData( value );\ |
| 527 | variant.SetData( data );\ |
| 528 | return variant;\ |
| 529 | } \ |
| 530 | IMPLEMENT_TRIVIAL_WXANY_CONVERSION(classname, classname##VariantData) |
| 531 | |
| 532 | // implements a wxVariantData-derived class using for the Eq() method the |
| 533 | // operator== which must have been provided by "classname" |
| 534 | #define IMPLEMENT_VARIANT_OBJECT_EXPORTED(classname,expdecl) \ |
| 535 | IMPLEMENT_VARIANT_OBJECT_EXPORTED_NO_EQ(classname,wxEMPTY_PARAMETER_VALUE expdecl) \ |
| 536 | \ |
| 537 | bool classname##VariantData::Eq(wxVariantData& data) const \ |
| 538 | {\ |
| 539 | wxASSERT( GetType() == data.GetType() );\ |
| 540 | \ |
| 541 | classname##VariantData & otherData = (classname##VariantData &) data;\ |
| 542 | \ |
| 543 | return otherData.m_value == m_value;\ |
| 544 | }\ |
| 545 | |
| 546 | |
| 547 | // implements a wxVariantData-derived class using for the Eq() method a shallow |
| 548 | // comparison (through wxObject::IsSameAs function) |
| 549 | #define IMPLEMENT_VARIANT_OBJECT_SHALLOWCMP(classname) \ |
| 550 | IMPLEMENT_VARIANT_OBJECT_EXPORTED_SHALLOWCMP(classname, wxEMPTY_PARAMETER_VALUE) |
| 551 | #define IMPLEMENT_VARIANT_OBJECT_EXPORTED_SHALLOWCMP(classname,expdecl) \ |
| 552 | IMPLEMENT_VARIANT_OBJECT_EXPORTED_NO_EQ(classname,wxEMPTY_PARAMETER_VALUE expdecl) \ |
| 553 | \ |
| 554 | bool classname##VariantData::Eq(wxVariantData& data) const \ |
| 555 | {\ |
| 556 | wxASSERT( GetType() == data.GetType() );\ |
| 557 | \ |
| 558 | classname##VariantData & otherData = (classname##VariantData &) data;\ |
| 559 | \ |
| 560 | return (otherData.m_value.IsSameAs(m_value));\ |
| 561 | }\ |
| 562 | |
| 563 | |
| 564 | // Since we want type safety wxVariant we need to fetch and dynamic_cast |
| 565 | // in a seemingly safe way so the compiler can check, so we define |
| 566 | // a dynamic_cast /wxDynamicCast analogue. |
| 567 | |
| 568 | #define wxGetVariantCast(var,classname) \ |
| 569 | ((classname*)(var.IsValueKindOf(&classname::ms_classInfo) ?\ |
| 570 | var.GetWxObjectPtr() : NULL)); |
| 571 | |
| 572 | // Replacement for using wxDynamicCast on a wxVariantData object |
| 573 | #define wxDynamicCastVariantData(data, classname) dynamic_cast<classname*>(data) |
| 574 | |
| 575 | extern wxVariant WXDLLIMPEXP_BASE wxNullVariant; |
| 576 | |
| 577 | #endif // wxUSE_VARIANT |
| 578 | |
| 579 | #endif // _WX_VARIANT_H_ |