src/common/variant.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        variant.cpp
   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)
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "variant.h"
  14 #endif
  15
  16 // For compilers that support precompilation, includes "wx/wx.h".
  17 #include "wx/wxprec.h"
  18
  19 #ifdef __BORLANDC__
  20 #pragma hdrstop
  21 #endif
  22
  23 #if wxUSE_IOSTREAMH
  24 #   include <fstream.h>
  25 #else
  26 #   include <fstream>
  27 #   ifdef _MSC_VER
  28         using namespace std;
  29 #   endif
  30 #endif
  31
  32 #include "wx/stream.h"
  33 #include "wx/string.h"
  34 #include "wx/variant.h"
  35
  36 IMPLEMENT_ABSTRACT_CLASS(wxVariantData, wxObject)
  37
  38 wxVariant wxNullVariant;
  39
  40 /*
  41  * wxVariantDataList
  42  */
  43
  44 class WXDLLEXPORT wxVariantDataList: public wxVariantData
  45 {
  46 DECLARE_DYNAMIC_CLASS(wxVariantDataList)
  47 public:
  48     wxVariantDataList() {}
  49     wxVariantDataList(const wxList& list);
  50     ~wxVariantDataList();
  51
  52     wxList& GetValue() const { return (wxList&) m_value; }
  53     void SetValue(const wxList& value) ;
  54
  55     virtual void Copy(wxVariantData& data);
  56     virtual bool Eq(wxVariantData& data) const;
  57     virtual bool Write(ostream& str) const;
  58     virtual bool Write(wxString& str) const;
  59     virtual bool Read(istream& str);
  60     virtual bool Read(wxString& str);
  61     virtual wxString GetType() const { return "list"; };
  62
  63     void Clear();
  64
  65 protected:
  66     wxList  m_value;
  67 };
  68
  69 IMPLEMENT_DYNAMIC_CLASS(wxVariantDataList, wxVariantData)
  70
  71 wxVariantDataList::wxVariantDataList(const wxList& list)
  72 {
  73     SetValue(list);
  74 }
  75
  76 wxVariantDataList::~wxVariantDataList()
  77 {
  78     Clear();
  79 }
  80
  81 void wxVariantDataList::SetValue(const wxList& value)
  82 {
  83     Clear();
  84     wxNode* node = value.First();
  85     while (node)
  86     {
  87         wxVariant* var = (wxVariant*) node->Data();
  88         m_value.Append(new wxVariant(*var));
  89         node = node->Next();
  90     }
  91 }
  92
  93 void wxVariantDataList::Clear()
  94 {
  95     wxNode* node = m_value.First();
  96     while (node)
  97     {
  98         wxVariant* var = (wxVariant*) node->Data();
  99         delete var;
 100         node = node->Next();
 101     }
 102     m_value.Clear();
 103 }
 104
 105 void wxVariantDataList::Copy(wxVariantData& data)
 106 {
 107     wxASSERT_MSG( (data.GetType() == "list"), "wxVariantDataList::Copy: Can't copy to this type of data" );
 108
 109     wxVariantDataList& listData = (wxVariantDataList&) data;
 110
 111     listData.Clear();
 112     wxNode* node = m_value.First();
 113     while (node)
 114     {
 115         wxVariant* var = (wxVariant*) node->Data();
 116         listData.m_value.Append(new wxVariant(*var));
 117         node = node->Next();
 118     }
 119 }
 120
 121 bool wxVariantDataList::Eq(wxVariantData& data) const
 122 {
 123     wxASSERT_MSG( (data.GetType() == "list"), "wxVariantDataList::Eq: argument mismatch" );
 124
 125     wxVariantDataList& listData = (wxVariantDataList&) data;
 126     wxNode* node1 = m_value.First();
 127     wxNode* node2 = listData.GetValue().First();
 128     while (node1 && node2)
 129     {
 130         wxVariant* var1 = (wxVariant*) node1->Data();
 131         wxVariant* var2 = (wxVariant*) node2->Data();
 132         if ((*var1) != (*var2))
 133             return FALSE;
 134         node1 = node1->Next();
 135         node2 = node2->Next();
 136     }
 137     if (node1 || node2) return FALSE;
 138     return TRUE;
 139 }
 140
 141 bool wxVariantDataList::Write(ostream& str) const
 142 {
 143     wxString s;
 144     Write(s);
 145     str << (const char*) s;
 146     return TRUE;
 147 }
 148
 149 bool wxVariantDataList::Write(wxString& str) const
 150 {
 151     str = "";
 152     wxNode* node = m_value.First();
 153     while (node)
 154     {
 155         wxVariant* var = (wxVariant*) node->Data();
 156         if (node != m_value.First())
 157           str += " ";
 158         wxString str1;
 159         str += var->MakeString();
 160         node = node->Next();
 161     }
 162
 163     return TRUE;
 164 }
 165
 166 bool wxVariantDataList::Read(istream& WXUNUSED(str))
 167 {
 168     wxFAIL_MSG("Unimplemented");
 169     // TODO
 170     return FALSE;
 171 }
 172
 173 bool wxVariantDataList::Read(wxString& WXUNUSED(str))
 174 {
 175     wxFAIL_MSG("Unimplemented");
 176     // TODO
 177     return FALSE;
 178 }
 179
 180 /*
 181  * wxVariantDataStringList
 182  */
 183
 184 class WXDLLEXPORT wxVariantDataStringList: public wxVariantData
 185 {
 186 DECLARE_DYNAMIC_CLASS(wxVariantDataStringList)
 187 public:
 188     wxVariantDataStringList() {}
 189     wxVariantDataStringList(const wxStringList& list) { m_value = list; }
 190
 191     wxStringList& GetValue() const { return (wxStringList&) m_value; }
 192     void SetValue(const wxStringList& value);
 193
 194     virtual void Copy(wxVariantData& data);
 195     virtual bool Eq(wxVariantData& data) const;
 196     virtual bool Write(ostream& str) const;
 197     virtual bool Write(wxString& str) const;
 198     virtual bool Read(istream& str);
 199     virtual bool Read(wxString& str);
 200     virtual wxString GetType() const { return "stringlist"; };
 201
 202 protected:
 203     wxStringList  m_value;
 204 };
 205
 206 IMPLEMENT_DYNAMIC_CLASS(wxVariantDataStringList, wxVariantData)
 207
 208 void wxVariantDataStringList::SetValue(const wxStringList& value)
 209 {
 210     m_value = value;
 211 }
 212
 213 void wxVariantDataStringList::Copy(wxVariantData& data)
 214 {
 215     wxASSERT_MSG( (data.GetType() == "stringlist"), "wxVariantDataStringList::Copy: Can't copy to this type of data" );
 216
 217     wxVariantDataStringList& listData = (wxVariantDataStringList&) data;
 218
 219     listData.m_value = m_value ;
 220 }
 221
 222 bool wxVariantDataStringList::Eq(wxVariantData& data) const
 223 {
 224     wxASSERT_MSG( (data.GetType() == "stringlist"), "wxVariantDataStringList::Eq: argument mismatch" );
 225
 226     wxVariantDataStringList& listData = (wxVariantDataStringList&) data;
 227     wxNode* node1 = m_value.First();
 228     wxNode* node2 = listData.GetValue().First();
 229     while (node1 && node2)
 230     {
 231         wxString str1 ((char*) node1->Data());
 232         wxString str2 ((char*) node2->Data());
 233         if (str1 != str2)
 234             return FALSE;
 235         node1 = node1->Next();
 236         node2 = node2->Next();
 237     }
 238     if (node1 || node2) return FALSE;
 239     return TRUE;
 240 }
 241
 242 bool wxVariantDataStringList::Write(ostream& str) const
 243 {
 244     wxString s;
 245     Write(s);
 246     str << (const char*) s;
 247     return TRUE;
 248 }
 249
 250 bool wxVariantDataStringList::Write(wxString& str) const
 251 {
 252     str = "";
 253     wxNode* node = m_value.First();
 254     while (node)
 255     {
 256         char* s = (char*) node->Data();
 257         if (node != m_value.First())
 258           str += " ";
 259         str += s;
 260         node = node->Next();
 261     }
 262
 263     return TRUE;
 264 }
 265
 266 bool wxVariantDataStringList::Read(istream& WXUNUSED(str))
 267 {
 268     wxFAIL_MSG("Unimplemented");
 269     // TODO
 270     return FALSE;
 271 }
 272
 273 bool wxVariantDataStringList::Read(wxString& WXUNUSED(str))
 274 {
 275     wxFAIL_MSG("Unimplemented");
 276     // TODO
 277     return FALSE;
 278 }
 279
 280 /*
 281  * wxVariantDataLong
 282  */
 283
 284 class WXDLLEXPORT wxVariantDataLong: public wxVariantData
 285 {
 286 DECLARE_DYNAMIC_CLASS(wxVariantDataLong)
 287 public:
 288     wxVariantDataLong() { m_value = 0; }
 289     wxVariantDataLong(long value) { m_value = value; }
 290
 291     inline long GetValue() const { return m_value; }
 292     inline void SetValue(long value) { m_value = value; }
 293
 294     virtual void Copy(wxVariantData& data);
 295     virtual bool Eq(wxVariantData& data) const;
 296     virtual bool Write(ostream& str) const;
 297     virtual bool Write(wxString& str) const;
 298     virtual bool Write(wxOutputStream &str) const;
 299     virtual bool Read(istream& str);
 300     virtual bool Read(wxInputStream& str);
 301     virtual bool Read(wxString& str);
 302     virtual wxString GetType() const { return "long"; };
 303
 304 protected:
 305     long m_value;
 306 };
 307
 308 IMPLEMENT_DYNAMIC_CLASS(wxVariantDataLong, wxVariantData)
 309
 310 void wxVariantDataLong::Copy(wxVariantData& data)
 311 {
 312     wxASSERT_MSG( (data.GetType() == "long"), "wxVariantDataLong::Copy: Can't copy to this type of data" );
 313
 314     wxVariantDataLong& otherData = (wxVariantDataLong&) data;
 315
 316     otherData.m_value = m_value;
 317 }
 318
 319 bool wxVariantDataLong::Eq(wxVariantData& data) const
 320 {
 321     wxASSERT_MSG( (data.GetType() == "long"), "wxVariantDataLong::Eq: argument mismatch" );
 322
 323     wxVariantDataLong& otherData = (wxVariantDataLong&) data;
 324
 325     return (otherData.m_value == m_value);
 326 }
 327
 328 bool wxVariantDataLong::Write(ostream& str) const
 329 {
 330     wxString s;
 331     Write(s);
 332     str << (const char*) s;
 333     return TRUE;
 334 }
 335
 336 bool wxVariantDataLong::Write(wxOutputStream& str) const
 337 {
 338     str << m_value;
 339     return TRUE;
 340 }
 341
 342 bool wxVariantDataLong::Write(wxString& str) const
 343 {
 344     str.Printf("%ld", m_value);
 345     return TRUE;
 346 }
 347
 348 bool wxVariantDataLong::Read(istream& str)
 349 {
 350     str >> m_value;
 351     return TRUE;
 352 }
 353
 354 bool wxVariantDataLong::Read(wxInputStream& str)
 355 {
 356    str >> m_value;
 357    return TRUE;
 358 }
 359
 360 bool wxVariantDataLong::Read(wxString& str)
 361 {
 362     m_value = atol((const char*) str);
 363     return TRUE;
 364 }
 365
 366 /*
 367  * wxVariantDataReal
 368  */
 369
 370 class WXDLLEXPORT wxVariantDataReal: public wxVariantData
 371 {
 372 DECLARE_DYNAMIC_CLASS(wxVariantDataReal)
 373 public:
 374     wxVariantDataReal() { m_value = 0.0; }
 375     wxVariantDataReal(double value) { m_value = value; }
 376
 377     inline double GetValue() const { return m_value; }
 378     inline void SetValue(double value) { m_value = value; }
 379
 380     virtual void Copy(wxVariantData& data);
 381     virtual bool Eq(wxVariantData& data) const;
 382     virtual bool Write(ostream& str) const;
 383     virtual bool Write(wxString& str) const;
 384     virtual bool Write(wxOutputStream &str) const;
 385     virtual bool Read(istream& str);
 386     virtual bool Read(wxInputStream& str);
 387     virtual bool Read(wxString& str);
 388     virtual wxString GetType() const { return "double"; };
 389
 390 protected:
 391     double m_value;
 392 };
 393
 394 IMPLEMENT_DYNAMIC_CLASS(wxVariantDataReal, wxVariantData)
 395
 396 void wxVariantDataReal::Copy(wxVariantData& data)
 397 {
 398     wxASSERT_MSG( (data.GetType() == "double"), "wxVariantDataReal::Copy: Can't copy to this type of data" );
 399
 400     wxVariantDataReal& otherData = (wxVariantDataReal&) data;
 401
 402     otherData.m_value = m_value;
 403 }
 404
 405 bool wxVariantDataReal::Eq(wxVariantData& data) const
 406 {
 407     wxASSERT_MSG( (data.GetType() == "double"), "wxVariantDataReal::Eq: argument mismatch" );
 408
 409     wxVariantDataReal& otherData = (wxVariantDataReal&) data;
 410
 411     return (otherData.m_value == m_value);
 412 }
 413
 414 bool wxVariantDataReal::Write(ostream& str) const
 415 {
 416     wxString s;
 417     Write(s);
 418     str << (const char*) s;
 419     return TRUE;
 420 }
 421
 422 bool wxVariantDataReal::Write(wxOutputStream& str) const
 423 {
 424     str << m_value;
 425     return TRUE;
 426 }
 427
 428 bool wxVariantDataReal::Write(wxString& str) const
 429 {
 430     str.Printf("%.4f", m_value);
 431     return TRUE;
 432 }
 433
 434 bool wxVariantDataReal::Read(istream& str)
 435 {
 436     str >> m_value;
 437     return TRUE;
 438 }
 439
 440 bool wxVariantDataReal::Read(wxInputStream& str)
 441 {
 442     str >> (float&)m_value;
 443     return TRUE;
 444 }
 445
 446 bool wxVariantDataReal::Read(wxString& str)
 447 {
 448     m_value = atof((const char*) str);
 449     return TRUE;
 450 }
 451
 452 /*
 453  * wxVariantDataBool
 454  */
 455
 456 class WXDLLEXPORT wxVariantDataBool: public wxVariantData
 457 {
 458 DECLARE_DYNAMIC_CLASS(wxVariantDataBool)
 459 public:
 460     wxVariantDataBool() { m_value = 0; }
 461     wxVariantDataBool(bool value) { m_value = value; }
 462
 463     inline bool GetValue() const { return m_value; }
 464     inline void SetValue(bool value) { m_value = value; }
 465
 466     virtual void Copy(wxVariantData& data);
 467     virtual bool Eq(wxVariantData& data) const;
 468     virtual bool Write(ostream& str) const;
 469     virtual bool Write(wxOutputStream& str) const;
 470     virtual bool Write(wxString& str) const;
 471     virtual bool Read(istream& str);
 472     virtual bool Read(wxInputStream& str);
 473     virtual bool Read(wxString& str);
 474     virtual wxString GetType() const { return "bool"; };
 475
 476 protected:
 477     bool m_value;
 478 };
 479
 480 IMPLEMENT_DYNAMIC_CLASS(wxVariantDataBool, wxVariantData)
 481
 482 void wxVariantDataBool::Copy(wxVariantData& data)
 483 {
 484     wxASSERT_MSG( (data.GetType() == "bool"), "wxVariantDataBool::Copy: Can't copy to this type of data" );
 485
 486     wxVariantDataBool& otherData = (wxVariantDataBool&) data;
 487
 488     otherData.m_value = m_value;
 489 }
 490
 491 bool wxVariantDataBool::Eq(wxVariantData& data) const
 492 {
 493     wxASSERT_MSG( (data.GetType() == "bool"), "wxVariantDataBool::Eq: argument mismatch" );
 494
 495     wxVariantDataBool& otherData = (wxVariantDataBool&) data;
 496
 497     return (otherData.m_value == m_value);
 498 }
 499
 500 bool wxVariantDataBool::Write(ostream& str) const
 501 {
 502     wxString s;
 503     Write(s);
 504     str << (const char*) s;
 505     return TRUE;
 506 }
 507
 508 bool wxVariantDataBool::Write(wxOutputStream& str) const
 509 {
 510     str << (char)m_value;
 511     return TRUE;
 512 }
 513
 514 bool wxVariantDataBool::Write(wxString& str) const
 515 {
 516     str.Printf("%d", (int) m_value);
 517     return TRUE;
 518 }
 519
 520 bool wxVariantDataBool::Read(istream& WXUNUSED(str))
 521 {
 522     wxFAIL_MSG("Unimplemented");
 523 //    str >> (long) m_value;
 524     return FALSE;
 525 }
 526
 527 bool wxVariantDataBool::Read(wxInputStream& str)
 528 {
 529     str >> (char&)m_value;
 530     return TRUE;
 531 }
 532
 533 bool wxVariantDataBool::Read(wxString& str)
 534 {
 535     m_value = (atol((const char*) str) != 0);
 536     return TRUE;
 537 }
 538
 539 /*
 540  * wxVariantDataChar
 541  */
 542
 543 class WXDLLEXPORT wxVariantDataChar: public wxVariantData
 544 {
 545 DECLARE_DYNAMIC_CLASS(wxVariantDataChar)
 546 public:
 547     wxVariantDataChar() { m_value = 0; }
 548     wxVariantDataChar(char value) { m_value = value; }
 549
 550     inline char GetValue() const { return m_value; }
 551     inline void SetValue(char value) { m_value = value; }
 552
 553     virtual void Copy(wxVariantData& data);
 554     virtual bool Eq(wxVariantData& data) const;
 555     virtual bool Write(ostream& str) const;
 556     virtual bool Write(wxOutputStream& str) const;
 557     virtual bool Write(wxString& str) const;
 558     virtual bool Read(istream& str);
 559     virtual bool Read(wxInputStream& str);
 560     virtual bool Read(wxString& str);
 561     virtual wxString GetType() const { return "char"; };
 562
 563 protected:
 564     char m_value;
 565 };
 566
 567 IMPLEMENT_DYNAMIC_CLASS(wxVariantDataChar, wxVariantData)
 568
 569 void wxVariantDataChar::Copy(wxVariantData& data)
 570 {
 571     wxASSERT_MSG( (data.GetType() == "char"), "wxVariantDataChar::Copy: Can't copy to this type of data" );
 572
 573     wxVariantDataChar& otherData = (wxVariantDataChar&) data;
 574
 575     otherData.m_value = m_value;
 576 }
 577
 578 bool wxVariantDataChar::Eq(wxVariantData& data) const
 579 {
 580     wxASSERT_MSG( (data.GetType() == "char"), "wxVariantDataChar::Eq: argument mismatch" );
 581
 582     wxVariantDataChar& otherData = (wxVariantDataChar&) data;
 583
 584     return (otherData.m_value == m_value);
 585 }
 586
 587 bool wxVariantDataChar::Write(ostream& str) const
 588 {
 589     wxString s;
 590     Write(s);
 591     str << (const char*) s;
 592     return TRUE;
 593 }
 594
 595 bool wxVariantDataChar::Write(wxOutputStream& str) const
 596 {
 597     str << m_value;
 598     return TRUE;
 599 }
 600
 601 bool wxVariantDataChar::Write(wxString& str) const
 602 {
 603     str.Printf("%c", m_value);
 604     return TRUE;
 605 }
 606
 607 bool wxVariantDataChar::Read(istream& WXUNUSED(str))
 608 {
 609     wxFAIL_MSG("Unimplemented");
 610 //    str >> m_value;
 611     return FALSE;
 612 }
 613
 614 bool wxVariantDataChar::Read(wxInputStream& str)
 615 {
 616     str >> m_value;
 617     return TRUE;
 618 }
 619
 620 bool wxVariantDataChar::Read(wxString& str)
 621 {
 622     m_value = str[(size_t)0];
 623     return TRUE;
 624 }
 625
 626 /*
 627  * wxVariantDataString
 628  */
 629
 630 class WXDLLEXPORT wxVariantDataString: public wxVariantData
 631 {
 632 DECLARE_DYNAMIC_CLASS(wxVariantDataString)
 633 public:
 634     wxVariantDataString() { }
 635     wxVariantDataString(const wxString& value) { m_value = value; }
 636
 637     inline wxString GetValue() const { return m_value; }
 638     inline void SetValue(const wxString& value) { m_value = value; }
 639
 640     virtual void Copy(wxVariantData& data);
 641     virtual bool Eq(wxVariantData& data) const;
 642     virtual bool Write(ostream& str) const;
 643     virtual bool Write(wxOutputStream& str) const;
 644     virtual bool Write(wxString& str) const;
 645     virtual bool Read(istream& str);
 646     virtual bool Read(wxInputStream& str);
 647     virtual bool Read(wxString& str);
 648     virtual wxString GetType() const { return "string"; };
 649
 650 protected:
 651     wxString m_value;
 652 };
 653
 654 void wxVariantDataString::Copy(wxVariantData& data)
 655 {
 656     wxASSERT_MSG( (data.GetType() == "string"), "wxVariantDataString::Copy: Can't copy to this type of data" );
 657
 658     wxVariantDataString& otherData = (wxVariantDataString&) data;
 659
 660     otherData.m_value = m_value;
 661 }
 662
 663 bool wxVariantDataString::Eq(wxVariantData& data) const
 664 {
 665     wxASSERT_MSG( (data.GetType() == "string"), "wxVariantDataString::Eq: argument mismatch" );
 666
 667     wxVariantDataString& otherData = (wxVariantDataString&) data;
 668
 669     return (otherData.m_value == m_value);
 670 }
 671
 672 bool wxVariantDataString::Write(ostream& str) const
 673 {
 674     str << (const char*) m_value;
 675     return TRUE;
 676 }
 677
 678 bool wxVariantDataString::Write(wxOutputStream& str) const
 679 {
 680     str << (const char*) m_value;
 681     return TRUE;
 682 }
 683
 684 bool wxVariantDataString::Write(wxString& str) const
 685 {
 686     str = m_value;
 687     return TRUE;
 688 }
 689
 690 bool wxVariantDataString::Read(istream& str)
 691 {
 692     str >> m_value;
 693     return TRUE;
 694 }
 695
 696 bool wxVariantDataString::Read(wxInputStream& str)
 697 {
 698     str >> m_value;
 699     return TRUE;
 700 }
 701
 702 bool wxVariantDataString::Read(wxString& str)
 703 {
 704     m_value = str;
 705     return TRUE;
 706 }
 707
 708 IMPLEMENT_DYNAMIC_CLASS(wxVariantDataString, wxVariantData)
 709
 710 /*
 711  * wxVariantDataTime
 712  */
 713
 714 #if wxUSE_TIMEDATE
 715
 716 class wxVariantDataTime: public wxVariantData
 717 {
 718  DECLARE_DYNAMIC_CLASS(wxVariantDataTime)
 719 public:
 720     wxVariantDataTime() { }
 721     wxVariantDataTime(const wxTime& value) { m_value = value; }
 722
 723     inline wxTime GetValue() const { return m_value; }
 724     inline void SetValue(const wxTime& value) { m_value = value; }
 725
 726     virtual void Copy(wxVariantData& data);
 727     virtual bool Eq(wxVariantData& data) const;
 728     virtual bool Write(ostream& str) const;
 729     virtual bool Write(wxString& str) const;
 730     virtual bool Read(istream& str);
 731     virtual bool Read(wxString& str);
 732     virtual wxString GetType() const { return "time"; };
 733         virtual wxVariantData* Clone() { return new wxVariantDataTime; }
 734
 735 protected:
 736     wxTime m_value;
 737 };
 738
 739 IMPLEMENT_DYNAMIC_CLASS(wxVariantDataTime, wxVariantData)
 740
 741 void wxVariantDataTime::Copy(wxVariantData& data)
 742 {
 743     wxASSERT_MSG( (data.GetType() == "time"), "wxVariantDataTime::Copy: Can't copy to this type of data" );
 744
 745     wxVariantDataTime& otherData = (wxVariantDataTime&) data;
 746
 747     otherData.m_value = m_value;
 748 }
 749
 750 bool wxVariantDataTime::Eq(wxVariantData& data) const
 751 {
 752     wxASSERT_MSG( (data.GetType() == "time"), "wxVariantDataTime::Eq: argument mismatch" );
 753
 754     wxVariantDataTime& otherData = (wxVariantDataTime&) data;
 755
 756     return (otherData.m_value == m_value);
 757 }
 758
 759 bool wxVariantDataTime::Write(ostream& str) const
 760 {
 761     wxString s;
 762     Write(s);
 763     str << (const char*) s;
 764     return TRUE;
 765 }
 766
 767 bool wxVariantDataTime::Write(wxString& str) const
 768 {
 769     char*s = m_value.FormatTime();
 770     str = s;
 771     return TRUE;
 772 }
 773
 774 bool wxVariantDataTime::Read(istream& WXUNUSED(str))
 775 {
 776     // Not implemented
 777     return FALSE;
 778 }
 779
 780 bool wxVariantDataTime::Read(wxString& WXUNUSED(str))
 781 {
 782     // Not implemented
 783     return FALSE;
 784 }
 785
 786 /*
 787  * wxVariantDataDate
 788  */
 789
 790 class wxVariantDataDate: public wxVariantData
 791 {
 792  DECLARE_DYNAMIC_CLASS(wxVariantDataDate)
 793 public:
 794     wxVariantDataDate() { }
 795     wxVariantDataDate(const wxDate& value) { m_value = value; }
 796
 797     inline wxDate GetValue() const { return m_value; }
 798     inline void SetValue(const wxDate& value) { m_value = value; }
 799
 800     virtual void Copy(wxVariantData& data);
 801     virtual bool Eq(wxVariantData& data) const;
 802     virtual bool Write(ostream& str) const;
 803     virtual bool Write(wxString& str) const;
 804     virtual bool Read(istream& str);
 805     virtual bool Read(wxString& str);
 806     virtual wxString GetType() const { return "date"; };
 807         virtual wxVariantData* Clone() { return new wxVariantDataDate; }
 808
 809 protected:
 810     wxDate m_value;
 811 };
 812
 813 IMPLEMENT_DYNAMIC_CLASS(wxVariantDataDate, wxVariantData)
 814
 815 void wxVariantDataDate::Copy(wxVariantData& data)
 816 {
 817     wxASSERT_MSG( (data.GetType() == "date"), "wxVariantDataDate::Copy: Can't copy to this type of data" );
 818
 819     wxVariantDataDate& otherData = (wxVariantDataDate&) data;
 820
 821     otherData.m_value = m_value;
 822 }
 823
 824 bool wxVariantDataDate::Eq(wxVariantData& data) const
 825 {
 826     wxASSERT_MSG( (data.GetType() == "date"), "wxVariantDataDate::Eq: argument mismatch" );
 827
 828     wxVariantDataDate& otherData = (wxVariantDataDate&) data;
 829
 830     return (otherData.m_value == m_value);
 831 }
 832
 833 bool wxVariantDataDate::Write(ostream& str) const
 834 {
 835     wxString s;
 836     Write(s);
 837     str << (const char*) s;
 838     return TRUE;
 839 }
 840
 841 bool wxVariantDataDate::Write(wxString& str) const
 842 {
 843     str = m_value.FormatDate();
 844     return TRUE;
 845 }
 846
 847 bool wxVariantDataDate::Read(istream& WXUNUSED(str))
 848 {
 849     // Not implemented
 850     return FALSE;
 851 }
 852
 853 bool wxVariantDataDate::Read(wxString& WXUNUSED(str))
 854 {
 855     // Not implemented
 856     return FALSE;
 857 }
 858 #endif
 859   // wxUSE_TIMEDATE
 860
 861 /*
 862  * wxVariantDataVoidPtr
 863  */
 864
 865 class wxVariantDataVoidPtr: public wxVariantData
 866 {
 867 DECLARE_DYNAMIC_CLASS(wxVariantDataVoidPtr)
 868 public:
 869     wxVariantDataVoidPtr() { }
 870     wxVariantDataVoidPtr(void* value) { m_value = value; }
 871
 872     inline void* GetValue() const { return m_value; }
 873     inline void SetValue(void* value) { m_value = value; }
 874
 875     virtual void Copy(wxVariantData& data);
 876     virtual bool Eq(wxVariantData& data) const;
 877     virtual bool Write(ostream& str) const;
 878     virtual bool Write(wxString& str) const;
 879     virtual bool Read(istream& str);
 880     virtual bool Read(wxString& str);
 881     virtual wxString GetType() const { return "void*"; };
 882         virtual wxVariantData* Clone() { return new wxVariantDataVoidPtr; }
 883
 884 protected:
 885     void* m_value;
 886 };
 887
 888 IMPLEMENT_DYNAMIC_CLASS(wxVariantDataVoidPtr, wxVariantData)
 889
 890 void wxVariantDataVoidPtr::Copy(wxVariantData& data)
 891 {
 892     wxASSERT_MSG( (data.GetType() == "void*"), "wxVariantDataVoidPtr::Copy: Can't copy to this type of data" );
 893
 894     wxVariantDataVoidPtr& otherData = (wxVariantDataVoidPtr&) data;
 895
 896     otherData.m_value = m_value;
 897 }
 898
 899 bool wxVariantDataVoidPtr::Eq(wxVariantData& data) const
 900 {
 901     wxASSERT_MSG( (data.GetType() == "void*"), "wxVariantDataVoidPtr::Eq: argument mismatch" );
 902
 903     wxVariantDataVoidPtr& otherData = (wxVariantDataVoidPtr&) data;
 904
 905     return (otherData.m_value == m_value);
 906 }
 907
 908 bool wxVariantDataVoidPtr::Write(ostream& str) const
 909 {
 910     wxString s;
 911     Write(s);
 912     str << (const char*) s;
 913     return TRUE;
 914 }
 915
 916 bool wxVariantDataVoidPtr::Write(wxString& str) const
 917 {
 918     char buf[80];
 919     sprintf(buf, "%ld", (long) m_value);
 920     str = buf;
 921     return TRUE;
 922 }
 923
 924 bool wxVariantDataVoidPtr::Read(istream& WXUNUSED(str))
 925 {
 926     // Not implemented
 927     return FALSE;
 928 }
 929
 930 bool wxVariantDataVoidPtr::Read(wxString& WXUNUSED(str))
 931 {
 932     // Not implemented
 933     return FALSE;
 934 }
 935
 936
 937 /*
 938  * wxVariant
 939  */
 940
 941 IMPLEMENT_DYNAMIC_CLASS(wxVariant, wxObject)
 942
 943 // Construction & destruction
 944 wxVariant::wxVariant()
 945 {
 946     m_data = (wxVariantData*) NULL;
 947 }
 948
 949 wxVariant::wxVariant(double val, const wxString& name)
 950 {
 951     m_data = new wxVariantDataReal(val);
 952     m_name = name;
 953 }
 954
 955 wxVariant::wxVariant(long val, const wxString& name)
 956 {
 957     m_data = new wxVariantDataLong(val);
 958     m_name = name;
 959 }
 960
 961 wxVariant::wxVariant(bool val, const wxString& name)
 962 {
 963     m_data = new wxVariantDataBool(val);
 964     m_name = name;
 965 }
 966
 967 wxVariant::wxVariant(char val, const wxString& name)
 968 {
 969     m_data = new wxVariantDataChar(val);
 970     m_name = name;
 971 }
 972
 973 wxVariant::wxVariant(const wxString& val, const wxString& name)
 974 {
 975     m_data = new wxVariantDataString(val);
 976     m_name = name;
 977 }
 978
 979 wxVariant::wxVariant(const char* val, const wxString& name)
 980 {
 981     m_data = new wxVariantDataString(wxString(val));
 982     m_name = name;
 983 }
 984
 985 wxVariant::wxVariant(const wxStringList& val, const wxString& name)
 986 {
 987     m_data = new wxVariantDataStringList(val);
 988     m_name = name;
 989 }
 990
 991 wxVariant::wxVariant(const wxList& val, const wxString& name) // List of variants
 992 {
 993     m_data = new wxVariantDataList(val);
 994     m_name = name;
 995 }
 996
 997 #if wxUSE_TIMEDATE
 998 wxVariant::wxVariant(const wxTime& val, const wxString& name) // Time
 999 {
1000     m_data = new wxVariantDataTime(val);
1001     m_name = name;
1002 }
1003
1004 wxVariant::wxVariant(const wxDate& val, const wxString& name) // Date
1005 {
1006     m_data = new wxVariantDataDate(val);
1007     m_name = name;
1008 }
1009 #endif
1010
1011 wxVariant::wxVariant(void* val, const wxString& name) // Void ptr
1012 {
1013     m_data = new wxVariantDataVoidPtr(val);
1014     m_name = name;
1015 }
1016
1017 wxVariant::wxVariant(const wxVariant& variant)
1018 {
1019     if (!variant.IsNull())
1020     {
1021         m_data = (wxVariantData*) variant.GetData()->GetClassInfo()->CreateObject();
1022         variant.m_data->Copy(*m_data);
1023     }
1024     else
1025         m_data = (wxVariantData*) NULL;
1026     m_name = variant.m_name;
1027 }
1028
1029 wxVariant::wxVariant(wxVariantData* data, const wxString& name) // User-defined data
1030 {
1031     m_data = data;
1032     m_name = name;
1033 }
1034
1035 wxVariant::~wxVariant()
1036 {
1037     delete m_data;
1038 }
1039
1040
1041 // Make NULL (i.e. delete the data)
1042 void wxVariant::MakeNull()
1043 {
1044     delete m_data;
1045     m_data = NULL;
1046 }
1047
1048 // Generic operators
1049 // Assignment
1050 void wxVariant::operator= (const wxVariant& variant)
1051 {
1052     if (variant.IsNull())
1053     {
1054         MakeNull();
1055         return;
1056     }
1057
1058     if (IsNull() || (GetType() != variant.GetType()))
1059     {
1060         if (m_data)
1061             delete m_data;
1062         m_data = (wxVariantData*) variant.GetData()->GetClassInfo()->CreateObject();
1063     }
1064 //    GetData()->Copy(* variant.GetData());
1065     variant.GetData()->Copy(* GetData());
1066 }
1067
1068 // Assignment using data, e.g.
1069 // myVariant = new wxStringVariantData("hello")
1070 void wxVariant::operator= (wxVariantData* variantData)
1071 {
1072     MakeNull();
1073     m_data = variantData;
1074 }
1075
1076 bool wxVariant::operator== (const wxVariant& variant) const
1077 {
1078     if (IsNull() || variant.IsNull())
1079         return (IsNull() == variant.IsNull());
1080
1081     return (GetData()->Eq(* variant.GetData()));
1082 }
1083
1084 bool wxVariant::operator!= (const wxVariant& variant) const
1085 {
1086     return (!(*this == variant));
1087 }
1088
1089
1090 // Specific operators
1091 bool wxVariant::operator== (double value) const
1092 {
1093     double thisValue;
1094     if (!Convert(&thisValue))
1095         return FALSE;
1096     else
1097         return (value == thisValue);
1098 }
1099
1100 bool wxVariant::operator!= (double value) const
1101 {
1102     return (!((*this) == value));
1103 }
1104
1105 void wxVariant::operator= (double value)
1106 {
1107     if (GetType() == "double")
1108     {
1109         ((wxVariantDataReal*)GetData())->SetValue(value);
1110     }
1111     else
1112     {
1113         if (m_data)
1114             delete m_data;
1115         m_data = new wxVariantDataReal(value);
1116     }
1117 }
1118
1119 bool wxVariant::operator== (long value) const
1120 {
1121     long thisValue;
1122     if (!Convert(&thisValue))
1123         return FALSE;
1124     else
1125         return (value == thisValue);
1126 }
1127
1128 bool wxVariant::operator!= (long value) const
1129 {
1130     return (!((*this) == value));
1131 }
1132
1133 void wxVariant::operator= (long value)
1134 {
1135     if (GetType() == "long")
1136     {
1137         ((wxVariantDataLong*)GetData())->SetValue(value);
1138     }
1139     else
1140     {
1141         if (m_data)
1142             delete m_data;
1143         m_data = new wxVariantDataLong(value);
1144     }
1145 }
1146
1147 bool wxVariant::operator== (char value) const
1148 {
1149     char thisValue;
1150     if (!Convert(&thisValue))
1151         return FALSE;
1152     else
1153         return (value == thisValue);
1154 }
1155
1156 bool wxVariant::operator!= (char value) const
1157 {
1158     return (!((*this) == value));
1159 }
1160
1161 void wxVariant::operator= (char value)
1162 {
1163     if (GetType() == "char")
1164     {
1165         ((wxVariantDataChar*)GetData())->SetValue(value);
1166     }
1167     else
1168     {
1169         if (m_data)
1170             delete m_data;
1171         m_data = new wxVariantDataChar(value);
1172     }
1173 }
1174
1175 bool wxVariant::operator== (bool value) const
1176 {
1177     bool thisValue;
1178     if (!Convert(&thisValue))
1179         return FALSE;
1180     else
1181         return (value == thisValue);
1182 }
1183
1184 bool wxVariant::operator!= (bool value) const
1185 {
1186     return (!((*this) == value));
1187 }
1188
1189 void wxVariant::operator= (bool value)
1190 {
1191     if (GetType() == "bool")
1192     {
1193         ((wxVariantDataBool*)GetData())->SetValue(value);
1194     }
1195     else
1196     {
1197         if (m_data)
1198             delete m_data;
1199         m_data = new wxVariantDataBool(value);
1200     }
1201 }
1202
1203 bool wxVariant::operator== (const wxString& value) const
1204 {
1205     wxString thisValue;
1206     if (!Convert(&thisValue))
1207         return FALSE;
1208     else
1209         return (value == thisValue);
1210 }
1211
1212 bool wxVariant::operator!= (const wxString& value) const
1213 {
1214     return (!((*this) == value));
1215 }
1216
1217 void wxVariant::operator= (const wxString& value)
1218 {
1219     if (GetType() == "string")
1220     {
1221         ((wxVariantDataString*)GetData())->SetValue(value);
1222     }
1223     else
1224     {
1225         if (m_data)
1226             delete m_data;
1227         m_data = new wxVariantDataString(value);
1228     }
1229 }
1230
1231 void wxVariant::operator= (const char* value)
1232 {
1233     if (GetType() == "string")
1234     {
1235         ((wxVariantDataString*)GetData())->SetValue(wxString(value));
1236     }
1237     else
1238     {
1239         if (m_data)
1240             delete m_data;
1241         m_data = new wxVariantDataString(wxString(value));
1242     }
1243 }
1244
1245 bool wxVariant::operator== (const wxStringList& value) const
1246 {
1247     wxASSERT_MSG( (GetType() == "stringlist"), "Invalid type for == operator" );
1248
1249     wxVariantDataStringList other(value);
1250     return (m_data->Eq(other));
1251 }
1252
1253 bool wxVariant::operator!= (const wxStringList& value) const
1254 {
1255     return (!((*this) == value));
1256 }
1257
1258 void wxVariant::operator= (const wxStringList& value)
1259 {
1260     if (GetType() == "stringlist")
1261     {
1262         ((wxVariantDataStringList*)GetData())->SetValue(value);
1263     }
1264     else
1265     {
1266         if (m_data)
1267             delete m_data;
1268         m_data = new wxVariantDataStringList(value);
1269     }
1270 }
1271
1272 bool wxVariant::operator== (const wxList& value) const
1273 {
1274     wxASSERT_MSG( (GetType() == "list"), "Invalid type for == operator" );
1275
1276     wxVariantDataList other(value);
1277     return (m_data->Eq(other));
1278 }
1279
1280 bool wxVariant::operator!= (const wxList& value) const
1281 {
1282     return (!((*this) == value));
1283 }
1284
1285 void wxVariant::operator= (const wxList& value)
1286 {
1287     if (GetType() == "list")
1288     {
1289         ((wxVariantDataList*)GetData())->SetValue(value);
1290     }
1291     else
1292     {
1293         if (m_data)
1294             delete m_data;
1295         m_data = new wxVariantDataList(value);
1296     }
1297 }
1298
1299 #if wxUSE_TIMEDATE
1300 bool wxVariant::operator== (const wxTime& value) const
1301 {
1302     wxTime thisValue;
1303     if (!Convert(&thisValue))
1304         return FALSE;
1305     else
1306         return (value == thisValue);
1307 }
1308
1309 bool wxVariant::operator!= (const wxTime& value) const
1310 {
1311     return (!((*this) == value));
1312 }
1313
1314 void wxVariant::operator= (const wxTime& value)
1315 {
1316     if (GetType() == "time")
1317     {
1318         ((wxVariantDataTime*)GetData())->SetValue(value);
1319     }
1320     else
1321     {
1322         if (m_data)
1323             delete m_data;
1324         m_data = new wxVariantDataTime(value);
1325     }
1326 }
1327
1328 bool wxVariant::operator== (const wxDate& value) const
1329 {
1330     wxDate thisValue;
1331     if (!Convert(&thisValue))
1332         return FALSE;
1333     else
1334         return (value == thisValue);
1335 }
1336
1337 bool wxVariant::operator!= (const wxDate& value) const
1338 {
1339     return (!((*this) == value));
1340 }
1341
1342 void wxVariant::operator= (const wxDate& value)
1343 {
1344     if (GetType() == "date")
1345     {
1346         ((wxVariantDataTime*)GetData())->SetValue(value);
1347     }
1348     else
1349     {
1350         if (m_data)
1351             delete m_data;
1352         m_data = new wxVariantDataDate(value);
1353     }
1354 }
1355 #endif
1356
1357 bool wxVariant::operator== (void* value) const
1358 {
1359     return (value == ((wxVariantDataVoidPtr*)GetData())->GetValue());
1360 }
1361
1362 bool wxVariant::operator!= (void* value) const
1363 {
1364     return (!((*this) == value));
1365 }
1366
1367 void wxVariant::operator= (void* value)
1368 {
1369     if (GetType() == "void*")
1370     {
1371         ((wxVariantDataVoidPtr*)GetData())->SetValue(value);
1372     }
1373     else
1374     {
1375         if (m_data)
1376             delete m_data;
1377         m_data = new wxVariantDataVoidPtr(value);
1378     }
1379 }
1380
1381 // Treat a list variant as an array
1382 wxVariant wxVariant::operator[] (size_t idx) const
1383 {
1384     wxASSERT_MSG( (GetType() == "list" || GetType() == "stringlist"), "Invalid type for array operator" );
1385
1386     if (GetType() == "list")
1387     {
1388         wxVariantDataList* data = (wxVariantDataList*) m_data;
1389         wxASSERT_MSG( (idx < (size_t) data->GetValue().Number()), "Invalid index for array" );
1390         return * (wxVariant*) (data->GetValue().Nth(idx)->Data());
1391     }
1392     else if (GetType() == "stringlist")
1393     {
1394         wxVariantDataStringList* data = (wxVariantDataStringList*) m_data;
1395         wxASSERT_MSG( (idx < (size_t) data->GetValue().Number()), "Invalid index for array" );
1396
1397         wxVariant variant( wxString( (char*) (data->GetValue().Nth(idx)->Data()) ));
1398         return variant;
1399     }
1400     return wxNullVariant;
1401 }
1402
1403 wxVariant& wxVariant::operator[] (size_t idx)
1404 {
1405     // We can't return a reference to a variant for a string list, since the string
1406     // is actually stored as a char*, not a variant.
1407
1408     wxASSERT_MSG( (GetType() == "list"), "Invalid type for array operator" );
1409
1410     wxVariantDataList* data = (wxVariantDataList*) m_data;
1411     wxASSERT_MSG( (idx < (size_t) data->GetValue().Number()), "Invalid index for array" );
1412
1413     return * (wxVariant*) (data->GetValue().Nth(idx)->Data());
1414 }
1415
1416 // Return the number of elements in a list
1417 int wxVariant::GetCount() const
1418 {
1419     wxASSERT_MSG( (GetType() == "list" || GetType() == "stringlist"), "Invalid type for GetCount()" );
1420
1421     if (GetType() == "list")
1422     {
1423         wxVariantDataList* data = (wxVariantDataList*) m_data;
1424         return data->GetValue().Number();
1425     }
1426     else if (GetType() == "stringlist")
1427     {
1428         wxVariantDataStringList* data = (wxVariantDataStringList*) m_data;
1429         return data->GetValue().Number();
1430     }
1431     return 0;
1432 }
1433
1434 wxString wxVariant::MakeString() const
1435 {
1436     if (!IsNull())
1437     {
1438         wxString str;
1439         if (GetData()->Write(str))
1440             return str;
1441     }
1442     return wxString("");
1443 }
1444
1445 // Accessors
1446
1447 void wxVariant::SetData(wxVariantData* data)
1448 {
1449     if (m_data) delete m_data;
1450     m_data = data;
1451 }
1452
1453
1454 // Returns a string representing the type of the variant,
1455 // e.g. "string", "bool", "stringlist", "list", "double", "long"
1456 wxString wxVariant::GetType() const
1457 {
1458     if (IsNull())
1459         return wxString("null");
1460     else
1461         return m_data->GetType();
1462 }
1463
1464
1465 bool wxVariant::IsType(const wxString& type) const
1466 {
1467     return (GetType() == type);
1468 }
1469
1470
1471 // Value accessors
1472 double wxVariant::GetReal() const
1473 {
1474     double value;
1475     if (Convert(& value))
1476         return value;
1477     else
1478     {
1479         wxFAIL_MSG("Could not convert to a real number");
1480         return 0.0;
1481     }
1482 }
1483
1484 long wxVariant::GetInteger() const
1485 {
1486     long value;
1487     if (Convert(& value))
1488         return value;
1489     else
1490     {
1491         wxFAIL_MSG("Could not convert to an integer");
1492         return 0;
1493     }
1494 }
1495
1496 char wxVariant::GetChar() const
1497 {
1498     char value;
1499     if (Convert(& value))
1500         return value;
1501     else
1502     {
1503         wxFAIL_MSG("Could not convert to a char");
1504         return 0;
1505     }
1506 }
1507
1508 bool wxVariant::GetBool() const
1509 {
1510     bool value;
1511     if (Convert(& value))
1512         return value;
1513     else
1514     {
1515         wxFAIL_MSG("Could not convert to a bool");
1516         return 0;
1517     }
1518 }
1519
1520 wxString wxVariant::GetString() const
1521 {
1522     wxString value;
1523     if (Convert(& value))
1524         return value;
1525     else
1526     {
1527         wxFAIL_MSG("Could not convert to a string");
1528         return wxString("");
1529     }
1530 }
1531
1532 #if wxUSE_TIMEDATE
1533 wxTime wxVariant::GetTime() const
1534 {
1535     wxTime value;
1536     if (Convert(& value))
1537         return value;
1538     else
1539     {
1540         wxFAIL_MSG("Could not convert to a time");
1541         return wxTime();
1542     }
1543 }
1544
1545 wxDate wxVariant::GetDate() const
1546 {
1547     wxDate value;
1548     if (Convert(& value))
1549         return value;
1550     else
1551     {
1552         wxFAIL_MSG("Could not convert to a date");
1553         return wxDate();
1554     }
1555 }
1556 #endif
1557
1558 void* wxVariant::GetVoidPtr() const
1559 {
1560     wxASSERT( (GetType() == "void*") );
1561
1562     return (void*) ((wxVariantDataVoidPtr*) m_data)->GetValue();
1563 }
1564
1565 wxList& wxVariant::GetList() const
1566 {
1567     wxASSERT( (GetType() == "list") );
1568
1569     return (wxList&) ((wxVariantDataList*) m_data)->GetValue();
1570 }
1571
1572 wxStringList& wxVariant::GetStringList() const
1573 {
1574     wxASSERT( (GetType() == "stringlist") );
1575
1576     return (wxStringList&) ((wxVariantDataStringList*) m_data)->GetValue();
1577 }
1578
1579 // Append to list
1580 void wxVariant::Append(const wxVariant& value)
1581 {
1582     wxList& list = GetList();
1583
1584     list.Append(new wxVariant(value));
1585 }
1586
1587 // Insert at front of list
1588 void wxVariant::Insert(const wxVariant& value)
1589 {
1590     wxList& list = GetList();
1591
1592     list.Insert(new wxVariant(value));
1593 }
1594
1595 // Returns TRUE if the variant is a member of the list
1596 bool wxVariant::Member(const wxVariant& value) const
1597 {
1598     wxList& list = GetList();
1599
1600     wxNode* node = list.First();
1601     while (node)
1602     {
1603         wxVariant* other = (wxVariant*) node->Data();
1604         if (value == *other)
1605             return TRUE;
1606         node = node->Next();
1607     }
1608     return FALSE;
1609 }
1610
1611 // Deletes the nth element of the list
1612 bool wxVariant::Delete(int item)
1613 {
1614     wxList& list = GetList();
1615
1616     wxASSERT_MSG( (item < list.Number()), "Invalid index to Delete" );
1617     wxNode* node = list.Nth(item);
1618     wxVariant* variant = (wxVariant*) node->Data();
1619     delete variant;
1620     delete node;
1621     return TRUE;
1622 }
1623
1624 // Clear list
1625 void wxVariant::ClearList()
1626 {
1627     if (!IsNull() && (GetType() == "list"))
1628     {
1629         ((wxVariantDataList*) m_data)->Clear();
1630     }
1631     else
1632     {
1633         if (GetType() != "list")
1634         {
1635             delete m_data;
1636             m_data = NULL;
1637         }
1638         m_data = new wxVariantDataList;
1639     }
1640 }
1641
1642 // Type conversion
1643 bool wxVariant::Convert(long* value) const
1644 {
1645     wxString type(GetType());
1646     if (type == "double")
1647         *value = (long) (((wxVariantDataReal*)GetData())->GetValue());
1648     else if (type == "long")
1649         *value = ((wxVariantDataLong*)GetData())->GetValue();
1650     else if (type == "bool")
1651         *value = (long) (((wxVariantDataBool*)GetData())->GetValue());
1652     else if (type == "string")
1653         *value = atol((const char*) ((wxVariantDataString*)GetData())->GetValue());
1654     else
1655         return FALSE;
1656
1657     return TRUE;
1658 }
1659
1660 bool wxVariant::Convert(bool* value) const
1661 {
1662     wxString type(GetType());
1663     if (type == "double")
1664         *value = ((int) (((wxVariantDataReal*)GetData())->GetValue()) != 0);
1665     else if (type == "long")
1666         *value = (((wxVariantDataLong*)GetData())->GetValue() != 0);
1667     else if (type == "bool")
1668         *value = ((wxVariantDataBool*)GetData())->GetValue();
1669     else if (type == "string")
1670     {
1671         wxString val(((wxVariantDataString*)GetData())->GetValue());
1672         val.MakeLower();
1673         if (val == "true" || val == "yes")
1674             *value = TRUE;
1675         else if (val == "false" || val == "no")
1676             *value = FALSE;
1677         else
1678             return FALSE;
1679     }
1680     else
1681         return FALSE;
1682
1683     return TRUE;
1684 }
1685
1686 bool wxVariant::Convert(double* value) const
1687 {
1688     wxString type(GetType());
1689     if (type == "double")
1690         *value = ((wxVariantDataReal*)GetData())->GetValue();
1691     else if (type == "long")
1692         *value = (double) (((wxVariantDataLong*)GetData())->GetValue());
1693     else if (type == "bool")
1694         *value = (double) (((wxVariantDataBool*)GetData())->GetValue());
1695     else if (type == "string")
1696         *value = (double) atof((const char*) ((wxVariantDataString*)GetData())->GetValue());
1697     else
1698         return FALSE;
1699
1700     return TRUE;
1701 }
1702
1703 bool wxVariant::Convert(char* value) const
1704 {
1705     wxString type(GetType());
1706     if (type == "char")
1707         *value = ((wxVariantDataChar*)GetData())->GetValue();
1708     else if (type == "long")
1709         *value = (char) (((wxVariantDataLong*)GetData())->GetValue());
1710     else if (type == "bool")
1711         *value = (char) (((wxVariantDataBool*)GetData())->GetValue());
1712     else
1713         return FALSE;
1714
1715     return TRUE;
1716 }
1717
1718 bool wxVariant::Convert(wxString* value) const
1719 {
1720     *value = MakeString();
1721     return TRUE;
1722 }
1723
1724 #if wxUSE_TIMEDATE
1725 bool wxVariant::Convert(wxTime* value) const
1726 {
1727     wxString type(GetType());
1728     if (type == "time")
1729         *value = ((wxVariantDataTime*)GetData())->GetValue();
1730     else if (type == "date")
1731         *value = wxTime(((wxVariantDataDate*)GetData())->GetValue());
1732     else
1733         return FALSE;
1734
1735     return TRUE;
1736 }
1737
1738 bool wxVariant::Convert(wxDate* value) const
1739 {
1740     wxString type(GetType());
1741     if (type == "date")
1742         *value = ((wxVariantDataDate*)GetData())->GetValue();
1743     else
1744         return FALSE;
1745
1746     return TRUE;
1747 }
1748 #endif
1749  // wxUSE_TIMEDATE