samples/xti/xti.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        xti.cpp
   3 // Purpose:     eXtended RTTI support sample
   4 // Author:      Stefan Csomor, Francesco Montorsi
   5 // Modified by:
   6 // Created:     13/5/2007
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor, Francesco Montorsi
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 // For compilers that support precompilation, includes "wx/wx.h".
  21 #include "wx/wxprec.h"
  22
  23 #ifdef __BORLANDC__
  24     #pragma hdrstop
  25 #endif
  26
  27 // for all others, include the necessary headers (this file is usually all you
  28 // need because it includes almost all "standard" wxWidgets headers)
  29 #ifndef WX_PRECOMP
  30     #include "wx/wx.h"
  31 #endif
  32
  33 #include "wx/wx.h"
  34 #include "wx/variant.h"
  35 #include "wx/xml/xml.h"
  36 #include "wx/frame.h"
  37 #include "wx/notebook.h"
  38 #include "wx/event.h"
  39 #include "wx/spinbutt.h"
  40 #include "wx/spinctrl.h"
  41
  42 #include "wx/xtistrm.h"
  43 #include "wx/xtixml.h"
  44 #include "wx/txtstrm.h"
  45 #include "wx/wfstream.h"
  46 #include "wx/sstream.h"
  47 #include "wx/spinctrl.h"
  48
  49 #include "classlist.h"
  50 #include "codereadercallback.h"
  51
  52 #if !wxUSE_EXTENDED_RTTI
  53     #error This sample requires XTI (eXtended RTTI) enabled
  54 #endif
  55
  56
  57 // ----------------------------------------------------------------------------
  58 // resources
  59 // ----------------------------------------------------------------------------
  60
  61 #if !defined(__WXMSW__) && !defined(__WXPM__)
  62     #include "../sample.xpm"
  63 #endif
  64
  65 // ----------------------------------------------------------------------------
  66 // private classes
  67 // ----------------------------------------------------------------------------
  68
  69 // Define a new application type, each program should derive a class from wxApp
  70 class MyApp : public wxApp
  71 {
  72 public:
  73     virtual bool OnInit();
  74 };
  75
  76 // Define a new frame type: this is going to be our main frame
  77 class MyFrame : public wxFrame
  78 {
  79 public:
  80     // ctor(s)
  81     MyFrame(const wxString& title);
  82
  83     void OnPersist(wxCommandEvent& event);
  84     void OnDepersist(wxCommandEvent& event);
  85     void OnGenerateCode(wxCommandEvent& event);
  86     void OnDumpClasses(wxCommandEvent& event);
  87     void OnQuit(wxCommandEvent& event);
  88     void OnAbout(wxCommandEvent& event);
  89
  90 private:
  91     // any class wishing to process wxWidgets events must use this macro
  92     wxDECLARE_EVENT_TABLE();
  93 };
  94
  95 // ----------------------------------------------------------------------------
  96 // constants
  97 // ----------------------------------------------------------------------------
  98
  99 // IDs for the controls and the menu commands
 100 enum
 101 {
 102     // menu items
 103     Minimal_Persist = wxID_HIGHEST,
 104     Minimal_Depersist,
 105     Minimal_GenerateCode,
 106     Minimal_DumpClasses,
 107     Minimal_Quit = wxID_EXIT,
 108     Minimal_About = wxID_ABOUT
 109 };
 110
 111 // ----------------------------------------------------------------------------
 112 // event tables and other macros for wxWidgets
 113 // ----------------------------------------------------------------------------
 114
 115 BEGIN_EVENT_TABLE(MyFrame, wxFrame)
 116     EVT_MENU(Minimal_Persist, MyFrame::OnPersist)
 117     EVT_MENU(Minimal_Depersist, MyFrame::OnDepersist)
 118     EVT_MENU(Minimal_GenerateCode, MyFrame::OnGenerateCode)
 119     EVT_MENU(Minimal_DumpClasses, MyFrame::OnDumpClasses)
 120     EVT_MENU(Minimal_Quit,  MyFrame::OnQuit)
 121     EVT_MENU(Minimal_About, MyFrame::OnAbout)
 122 END_EVENT_TABLE()
 123
 124 wxIMPLEMENT_APP(MyApp);
 125
 126 // ============================================================================
 127 // implementation
 128 // ============================================================================
 129
 130 void RegisterFrameRTTI();
 131
 132 // ----------------------------------------------------------------------------
 133 // the application class
 134 // ----------------------------------------------------------------------------
 135
 136 bool MyApp::OnInit()
 137 {
 138     if ( !wxApp::OnInit() )
 139         return false;
 140
 141     RegisterFrameRTTI();
 142
 143     // create the main application window
 144     MyFrame *frame = new MyFrame(wxT("Extended RTTI sample"));
 145
 146     // and show it (the frames, unlike simple controls, are not shown when
 147     // created initially)
 148     frame->Show(true);
 149
 150     // success: wxApp::OnRun() will be called which will enter the main message
 151     // loop and the application will run. If we returned false here, the
 152     // application would exit immediately.
 153     return true;
 154 }
 155
 156 // ----------------------------------------------------------------------------
 157 // main frame
 158 // ----------------------------------------------------------------------------
 159
 160 MyFrame::MyFrame(const wxString& title)
 161     : wxFrame(NULL, wxID_ANY, title, wxDefaultPosition, wxSize(300, 200))
 162 {
 163     // set the frame icon
 164     SetIcon(wxICON(sample));
 165
 166 #if wxUSE_MENUS
 167     // create a menu bar
 168     wxMenu *fileMenu = new wxMenu;
 169
 170     // the "About" item should be in the help menu
 171     wxMenu *helpMenu = new wxMenu;
 172     helpMenu->Append(Minimal_About, wxT("&About...\tF1"), wxT("Show about dialog"));
 173
 174     fileMenu->Append(Minimal_Persist, wxT("Persist a wxFrame to XML..."),
 175                     wxT("Creates a wxFrame using wxXTI and saves its description as XML"));
 176     fileMenu->Append(Minimal_Depersist, wxT("Depersist XML file..."),
 177                     wxT("Loads the description of wxFrame from XML"));
 178     fileMenu->Append(Minimal_GenerateCode, wxT("Generate code for a wxFrame saved to XML..."),
 179                     wxT("Generates the C++ code which belong to a persisted wxFrame"));
 180     fileMenu->AppendSeparator();
 181     fileMenu->Append(Minimal_DumpClasses, wxT("Dump registered classes..."),
 182                     wxT("Dumps the description of all wxWidgets classes registered in XTI"));
 183     fileMenu->AppendSeparator();
 184     fileMenu->Append(Minimal_Quit, wxT("E&xit\tAlt-X"), wxT("Quit this program"));
 185
 186     // now append the freshly created menu to the menu bar...
 187     wxMenuBar *menuBar = new wxMenuBar();
 188     menuBar->Append(fileMenu, wxT("&File"));
 189     menuBar->Append(helpMenu, wxT("&Help"));
 190
 191     // ... and attach this menu bar to the frame
 192     SetMenuBar(menuBar);
 193 #endif // wxUSE_MENUS
 194
 195 #if wxUSE_STATUSBAR
 196     // create a status bar just for fun (by default with 1 pane only)
 197     CreateStatusBar(2);
 198     SetStatusText(wxT("Welcome to wxWidgets!"));
 199 #endif // wxUSE_STATUSBAR
 200 }
 201
 202
 203
 204 // ----------------------------------------------------------------------------
 205 // XTI sample code
 206 // ----------------------------------------------------------------------------
 207
 208 // this is the kind of source code that would end up being generated by a
 209 // designer corresponding to the information we are setting up via RTTI
 210 // in the CreateFrameRTTI function:
 211 //
 212 //  class MyXTIFrame : public wxFrame
 213 //  {
 214 //  public:
 215 //       //   construction
 216 //      MyXTIFrame()
 217 //      {
 218 //          Init();
 219 //          m_button = NULL;
 220 //      }
 221 //
 222 //      bool Create(wxWindow *parent,
 223 //                  wxWindowID id,
 224 //                  const wxString& title,
 225 //                  const wxPoint& pos = wxDefaultPosition,
 226 //                  const wxSize& size = wxDefaultSize,
 227 //                  long style = wxDEFAULT_FRAME_STYLE,
 228 //                  const wxString& name = wxFrameNameStr)
 229 //      {
 230 //          return wxFrame::Create( parent, id, title, pos, size, style, name );
 231 //      }
 232 //
 233 //      void SetButton( wxButton * button ) { m_button = button; }
 234 //      wxButton* GetButton() const { return m_button; }
 235 //
 236 //      void ButtonClickHandler( wxEvent & WXUNUSED(event) )
 237 //      {
 238 //          wxMessageBox( "Button Clicked ", "Hi!", wxOK );
 239 //      }
 240 //
 241 //  protected:
 242 //      wxButton* m_button;
 243 //
 244 //      DECLARE_EVENT_TABLE()
 245 //      DECLARE_DYNAMIC_CLASS_NO_COPY(MyXTIFrame)
 246 //  };
 247 //
 248 //  IMPLEMENT_DYNAMIC_CLASS_XTI(MyXTIFrame, MyXTIFrame, "x.h")
 249 //
 250 //  WX_BEGIN_PROPERTIES_TABLE(MyXTIFrame)
 251 //      WX_PROPERTY( Button, wxButton*, SetButton, GetButton, )
 252 //  WX_END_PROPERTIES_TABLE()
 253 //
 254 //  WX_BEGIN_HANDLERS_TABLE(MyXTIFrame)
 255 //      WX_HANDLER( ButtonClickHandler, wxCommandEvent )
 256 //  WX_END_HANDLERS_TABLE()
 257 //
 258 //  WX_CONSTRUCTOR_5( MyXTIFrame, wxWindow*, Parent, wxWindowID, Id,
 259 //                    wxString, Title, wxPoint, Position, wxSize, Size )
 260 //
 261 //  BEGIN_EVENT_TABLE(MyXTIFrame, wxFrame)
 262 //  END_EVENT_TABLE()
 263
 264 // the following class "persists" (i.e. saves) a wxFrame into a wxObjectWriter
 265
 266 class MyDesignerPersister : public wxObjectWriterCallback
 267 {
 268 public:
 269     MyDesignerPersister( wxDynamicObject * frame)
 270     {
 271         m_frame = frame;
 272     }
 273
 274     virtual bool BeforeWriteDelegate( wxObjectWriter *WXUNUSED(writer),
 275                                     const wxObject *object,
 276                                     const wxClassInfo* WXUNUSED(classInfo),
 277                                     const wxPropertyInfo *propInfo,
 278                                     const wxObject *&eventSink,
 279                                     const wxHandlerInfo* &handlerInfo )
 280     {
 281         // this approach would be used if the handler would not
 282         // be connected really in the designer, so we have to supply
 283         // the information
 284         const wxObject* but = wxAnyGetAsObjectPtr( m_frame->GetProperty(wxT("Button")) );
 285         if ( object == but &&
 286              propInfo == wxCLASSINFO( wxButton )->FindPropertyInfo(wxT("OnClick")) )
 287         {
 288             eventSink = m_frame;
 289             handlerInfo = m_frame->GetClassInfo()->
 290                 FindHandlerInfo(wxT("ButtonClickHandler"));
 291             return true;
 292         }
 293         return false;
 294     }
 295
 296 private:
 297     wxDynamicObject *m_frame;
 298 };
 299
 300 // sometimes linkers (at least MSVC and GCC ones) optimize the final EXE
 301 // even in debug mode pruning the object files which he "thinks" are useless;
 302 // thus the classes defined in those files won't be available in the XTI
 303 // table and the program will fail to allocate them.
 304 // The following macro implements a simple hack to ensure that a given
 305 // class is linked in.
 306 //
 307 // TODO: in wx/link.h there are already similar macros (also more "optimized":
 308 //       don't need the creation of fake object) which however require to use
 309 //       the wxFORCE_LINK_THIS_MODULE() macro inside the source files corresponding
 310 //       to the class being discarded.
 311 //
 312 #define wxENSURE_CLASS_IS_LINKED(x)     { x test; }
 313
 314 void RegisterFrameRTTI()
 315 {
 316     // set up the RTTI info for a class (MyXTIFrame) which
 317     // is not defined anywhere in this program
 318     wxDynamicClassInfo *dyninfo =
 319         wx_dynamic_cast( wxDynamicClassInfo *, wxClassInfo::FindClass(wxT("MyXTIFrame")));
 320     if ( dyninfo == NULL )
 321     {
 322         dyninfo = new wxDynamicClassInfo(wxT("myxtiframe.h"),
 323                             wxT("MyXTIFrame"),
 324                             CLASSINFO(wxFrame) );
 325
 326         // this class has a property named "Button" and the relative handler:
 327         dyninfo->AddProperty(wxT("Button"), wxGetTypeInfo((wxButton**) NULL));
 328         dyninfo->AddHandler(wxT("ButtonClickHandler"),
 329             NULL /* no instance of the handler method */, CLASSINFO( wxEvent ) );
 330     }
 331 }
 332
 333 wxDynamicObject* CreateFrameRTTI()
 334 {
 335     int baseID = 100;
 336     wxAny Params[10];
 337
 338     // the class is now part of XTI internal table so that we can
 339     // get a pointer to it just searching it like any other class:
 340     wxFrame* frame;
 341     wxClassInfo *info = wxClassInfo::FindClass(wxT("MyXTIFrame"));
 342     wxASSERT( info );
 343     wxDynamicObject* frameWrapper =
 344         wx_dynamic_cast(wxDynamicObject*, info->CreateObject() );
 345     Params[0] = wxAny((wxWindow*)(NULL));
 346     Params[1] = wxAny(wxWindowID(baseID++));
 347     Params[2] = wxAny(wxString(wxT("This is a frame created from XTI")));
 348     Params[3] = wxAny(wxPoint(-1,-1));
 349     Params[4] = wxAny(wxSize(400,300));
 350     Params[5] = wxAny((long)wxDEFAULT_FRAME_STYLE);
 351     wxASSERT( info->Create(frameWrapper, 6, Params ));
 352     frame = wx_dynamic_cast(wxFrame*, frameWrapper->GetSuperClassInstance());
 353
 354 #if 1
 355     // now build a notebook inside it:
 356     wxNotebook* notebook;
 357     info = wxClassInfo::FindClass("wxNotebook");
 358     wxASSERT( info );
 359     notebook = wxDynamicCast( info->CreateObject(), wxNotebook );
 360     Params[0] = wxAny((wxWindow*)frame);
 361     Params[1] = wxAny(wxWindowID(baseID++));
 362     Params[2] = wxAny(wxPoint( 10, 10 ));
 363     Params[3] = wxAny(wxDefaultSize);
 364     Params[4] = wxAny((long)0);
 365     wxASSERT( info->Create(notebook, 5, Params ));
 366
 367     // button page
 368
 369     wxPanel* panel;
 370     info = wxClassInfo::FindClass("wxPanel");
 371     wxASSERT( info );
 372     panel = wxDynamicCast( info->CreateObject(), wxPanel );
 373     Params[0] = wxAny((wxWindow*)(notebook));
 374     Params[1] = wxAny(wxWindowID(baseID++));
 375     Params[2] = wxAny(wxPoint(-1,-1));
 376     Params[3] = wxAny(wxSize(-1,-1));
 377     Params[4] = wxAny((long)0);
 378     Params[5] = wxAny(wxString(wxT("Hello")));
 379     wxASSERT( info->Create(panel, 6, Params ));
 380     notebook->AddPage( panel, "Buttons" );
 381
 382     wxButton* button;
 383     info = wxClassInfo::FindClass("wxButton");
 384     wxASSERT( info );
 385     button = wxDynamicCast( info->CreateObject(), wxButton );
 386     Params[0] = wxAny((wxWindow*)(panel));
 387     Params[1] = wxAny(wxWindowID(baseID++));
 388     Params[2] = wxAny(wxString(wxT("Click Me!")));
 389     Params[3] = wxAny(wxPoint( 10, 10 ));
 390     Params[4] = wxAny(wxSize(-1,-1));
 391     Params[5] = wxAny((long)0);
 392     wxASSERT( info->Create(button, 6, Params ));
 393     frameWrapper->SetProperty( wxT("Button"), wxAny( button ) );
 394
 395     // other controls page
 396
 397     info = wxClassInfo::FindClass("wxPanel");
 398     wxASSERT( info );
 399     panel = wxDynamicCast( info->CreateObject(), wxPanel );
 400     Params[0] = wxAny((wxWindow*)(notebook));
 401     Params[1] = wxAny(wxWindowID(baseID++));
 402     Params[2] = wxAny(wxPoint(-1,-1));
 403     Params[3] = wxAny(wxSize(-1,-1));
 404     Params[4] = wxAny((long)0);
 405     Params[5] = wxAny(wxString(wxT("Hello")));
 406     wxASSERT( info->Create(panel, 6, Params ));
 407     notebook->AddPage( panel, "Other Standard controls" );
 408
 409     wxControl* control;
 410     info = wxClassInfo::FindClass("wxCheckBox");
 411     wxASSERT( info );
 412     control = wxDynamicCast( info->CreateObject(), wxControl );
 413     Params[0] = wxAny((wxWindow*)(panel));
 414     Params[1] = wxAny(wxWindowID(baseID++));
 415     Params[2] = wxAny(wxString(wxT("A Checkbox")));
 416     Params[3] = wxAny(wxPoint( 10, 10 ));
 417     Params[4] = wxAny(wxSize(-1,-1));
 418     Params[5] = wxAny((long)0);
 419     wxASSERT( info->Create(control, 6, Params ));
 420
 421     info = wxClassInfo::FindClass("wxRadioButton");
 422     wxASSERT( info );
 423     control = wxDynamicCast( info->CreateObject(), wxControl );
 424     Params[0] = wxAny((wxWindow*)(panel));
 425     Params[1] = wxAny(wxWindowID(baseID++));
 426     Params[2] = wxAny(wxString(wxT("A Radiobutton")));
 427     Params[3] = wxAny(wxPoint( 10, 30 ));
 428     Params[4] = wxAny(wxSize(-1,-1));
 429     Params[5] = wxAny((long)0);
 430     wxASSERT( info->Create(control, 6, Params ));
 431
 432     control = wxDynamicCast( info->CreateObject(), wxControl );
 433     Params[1] = wxAny(wxWindowID(baseID++));
 434     Params[2] = wxAny(wxString(wxT("Another One")));
 435     Params[3] = wxAny(wxPoint( 10, 50 ));
 436     wxASSERT( info->Create(control, 6, Params ));
 437
 438     info = wxClassInfo::FindClass("wxStaticText");
 439     wxASSERT( info );
 440     control = wxDynamicCast( info->CreateObject(), wxControl );
 441     Params[0] = wxAny((wxWindow*)(panel));
 442     Params[1] = wxAny(wxWindowID(baseID++));
 443     Params[2] = wxAny(wxString(wxT("A Static Text!")));
 444     Params[3] = wxAny(wxPoint( 10, 70 ));
 445     Params[4] = wxAny(wxSize(-1,-1));
 446     Params[5] = wxAny((long)0);
 447     wxASSERT( info->Create(control, 6, Params ));
 448
 449     info = wxClassInfo::FindClass("wxStaticBox");
 450     wxASSERT( info );
 451     control = wxDynamicCast( info->CreateObject(), wxControl );
 452     Params[0] = wxAny((wxWindow*)(panel));
 453     Params[1] = wxAny(wxWindowID(baseID++));
 454     Params[2] = wxAny(wxString(wxT("A Static Box")));
 455     Params[3] = wxAny(wxPoint( 10, 90 ));
 456     Params[4] = wxAny(wxSize(100,80));
 457     Params[5] = wxAny((long)0);
 458     wxASSERT( info->Create(control, 6, Params ));
 459
 460     info = wxClassInfo::FindClass("wxTextCtrl");
 461     wxASSERT( info );
 462     control = wxDynamicCast( info->CreateObject(), wxControl );
 463     Params[0] = wxAny((wxWindow*)(panel));
 464     Params[1] = wxAny(wxWindowID(baseID++));
 465     Params[2] = wxAny(wxString(wxT("A Text Control")));
 466     Params[3] = wxAny(wxPoint( 10, 200 ));
 467     Params[4] = wxAny(wxSize(-1,-1));
 468     Params[5] = wxAny((long)0);
 469     wxASSERT( info->Create(control, 6, Params ));
 470
 471     // spins and gauges page
 472
 473     info = wxClassInfo::FindClass("wxPanel");
 474     wxASSERT( info );
 475     panel = wxDynamicCast( info->CreateObject(), wxPanel );
 476     Params[0] = wxAny((wxWindow*)(notebook));
 477     Params[1] = wxAny(wxWindowID(baseID++));
 478     Params[2] = wxAny(wxPoint(-1,-1));
 479     Params[3] = wxAny(wxSize(-1,-1));
 480     Params[4] = wxAny((long)0);
 481     Params[5] = wxAny(wxString(wxT("Hello")));
 482     wxASSERT( info->Create(panel, 6, Params ));
 483     notebook->AddPage( panel, "Spins and Sliders" );
 484
 485     wxENSURE_CLASS_IS_LINKED(wxSpinButton);
 486
 487     info = wxClassInfo::FindClass("wxSpinButton");
 488     wxASSERT( info );
 489     control = wxDynamicCast( info->CreateObject(), wxControl );
 490     Params[0] = wxAny((wxWindow*)(panel));
 491     Params[1] = wxAny(wxWindowID(baseID++));
 492     Params[2] = wxAny(wxPoint( 10, 10 ));
 493     Params[3] = wxAny(wxSize(-1,-1));
 494     Params[4] = wxAny((long)wxSP_VERTICAL | wxSP_ARROW_KEYS);
 495     wxASSERT( info->Create(control, 5, Params ));
 496
 497     wxENSURE_CLASS_IS_LINKED(wxSpinCtrl);
 498
 499     info = wxClassInfo::FindClass("wxSpinCtrl");
 500     wxASSERT( info );
 501     control = wxDynamicCast( info->CreateObject(), wxControl );
 502     Params[0] = wxAny((wxWindow*)(panel));
 503     Params[1] = wxAny(wxWindowID(baseID++));
 504     Params[2] = wxAny(wxString("20"));
 505     Params[3] = wxAny(wxPoint( 40, 10 ));
 506     Params[4] = wxAny(wxSize(40,-1));
 507     Params[5] = wxAny((long) wxSP_ARROW_KEYS);
 508     wxASSERT( info->Create(control, 6, Params ));
 509
 510     // MSVC likes to exclude from link wxGauge...
 511     wxENSURE_CLASS_IS_LINKED(wxGauge)
 512     wxENSURE_CLASS_IS_LINKED(wxCheckBox)
 513     wxENSURE_CLASS_IS_LINKED(wxSpinCtrl)
 514
 515     info = wxClassInfo::FindClass("wxGauge");
 516
 517     wxASSERT( info );
 518     control = wxDynamicCast( info->CreateObject(), wxControl );
 519     Params[0] = wxAny((wxWindow*)(panel));
 520     Params[1] = wxAny(wxWindowID(baseID++));
 521     Params[2] = wxAny((int) 100);
 522     Params[3] = wxAny(wxPoint( 10, 50 ));
 523     Params[4] = wxAny(wxSize(-1,-1));
 524     Params[5] = wxAny((long) wxGA_HORIZONTAL);
 525     wxASSERT( info->Create(control, 6, Params ));
 526     wx_dynamic_cast(wxGauge*, control)->SetValue(20);
 527
 528 #endif
 529     return frameWrapper;
 530 }
 531
 532 bool SaveFrameRTTI(const wxString &testFileName, wxDynamicObject *frame)
 533 {
 534     // setup the XML document
 535     wxXmlDocument xml;
 536     wxXmlNode *root = new wxXmlNode(wxXML_ELEMENT_NODE,
 537                                     "TestXTI", "This is the content");
 538     xml.SetRoot(root);
 539
 540     // setup the XTI writer and persister
 541     wxObjectXmlWriter writer(root);
 542     MyDesignerPersister persister(frame);
 543
 544     // write the given wxObject into the XML document
 545     wxStringToAnyHashMap empty;
 546     writer.WriteObject( frame, frame->GetClassInfo(), &persister,
 547                         wxString("myTestFrame"), empty );
 548
 549     return xml.Save(testFileName);
 550 }
 551
 552 wxDynamicObject* LoadFrameRTTI(const wxString &fileName)
 553 {
 554     // load the XML document
 555     wxXmlDocument xml;
 556     if (!xml.Load(fileName))
 557         return NULL;
 558
 559     wxXmlNode *root = xml.GetRoot();
 560     if (root->GetName() != "TestXTI")
 561         return NULL;
 562
 563     // now depersist the wxFrame we saved into it using wxObjectRuntimeReaderCallback
 564     wxObjectRuntimeReaderCallback Callbacks;
 565     wxObjectXmlReader Reader( root );
 566     int obj = Reader.ReadObject( wxString("myTestFrame"), &Callbacks );
 567     return (wxDynamicObject*)Callbacks.GetObject( obj );
 568 }
 569
 570 bool GenerateFrameRTTICode(const wxString &inFileName, const wxString &outFileName)
 571 {
 572     // is loading the streamed out component from xml and writing code that
 573     // will create the same component
 574
 575     wxFFileOutputStream fos( outFileName );
 576     wxTextOutputStream tos( fos );
 577     if (!fos.IsOk())
 578         return false;
 579
 580     wxXmlDocument xml;
 581     if (!xml.Load(inFileName))
 582         return false;
 583
 584     wxXmlNode *root = xml.GetRoot();
 585     if (root->GetName() != "TestXTI")
 586         return false;
 587
 588     // read the XML file using the wxObjectCodeReaderCallback
 589
 590     wxString headerincludes;
 591     wxString sourcecode;
 592     wxObjectCodeReaderCallback Callbacks(headerincludes,sourcecode);
 593     wxObjectXmlReader Reader(root);
 594
 595     // ReadObject will return the ID of the object read??
 596     Reader.ReadObject( wxString("myTestFrame"), &Callbacks );
 597
 598     // header preamble
 599     tos <<
 600         "#include \"wx/wxprec.h\" \n#ifdef __BORLANDC__\n#pragma hdrstop\n#endif\n#ifndef WX_PRECOMP\n#include \"wx/wx.h\" \n#endif\n\n";
 601     // add object includes
 602     tos.WriteString( headerincludes );
 603
 604     tos << "\n\nvoid test()\n{";
 605     tos.WriteString( sourcecode );
 606     tos << "}";
 607     return true;
 608 }
 609
 610
 611
 612
 613 // ----------------------------------------------------------------------------
 614 // MyFrame event handlers
 615 // ----------------------------------------------------------------------------
 616
 617 void MyFrame::OnPersist(wxCommandEvent& WXUNUSED(event))
 618 {
 619     // first create a frame using XTI calls
 620     wxDynamicObject *frame = CreateFrameRTTI();
 621     if (!frame)
 622     {
 623         wxLogError(wxT("Cannot create the XTI frame!"));
 624         return;
 625     }
 626
 627     // show the frame we're going to save to the user
 628     wxFrame *trueFrame = wx_dynamic_cast(wxFrame *, frame->GetSuperClassInstance() );
 629     trueFrame->Show();
 630
 631     // ask the user where to save it
 632     wxFileDialog dlg(this, wxT("Where should the frame be saved?"),
 633                      wxEmptyString, wxT("test.xml"), wxT("XML files (*.xml)|*.xml"),
 634                      wxFD_SAVE);
 635     if (dlg.ShowModal() == wxID_CANCEL)
 636         return;
 637
 638     // then save it to a test XML file
 639     if (!SaveFrameRTTI(dlg.GetPath(), frame))
 640     {
 641         wxLogError(wxT("Cannot save the XTI frame into '%s'"), dlg.GetPath());
 642         return;
 643     }
 644
 645     // now simply delete it
 646     delete frame;
 647 }
 648
 649 void MyFrame::OnDepersist(wxCommandEvent& WXUNUSED(event))
 650 {
 651     // ask the user which file to load
 652     wxFileDialog dlg(this, wxT("Which file contains the frame to depersist?"),
 653                      wxEmptyString, wxT("test.xml"), wxT("XML files (*.xml)|*.xml"),
 654                      wxFD_OPEN);
 655     if (dlg.ShowModal() == wxID_CANCEL)
 656         return;
 657
 658     wxObject *frame = LoadFrameRTTI(dlg.GetPath());
 659     if (!frame)
 660     {
 661         wxLogError(wxT("Could not depersist the wxFrame from '%s'"), dlg.GetPath());
 662         return;
 663     }
 664
 665     wxFrame *trueFrame = wx_dynamic_cast(wxFrame*, frame );
 666     if ( !trueFrame )
 667     {
 668         wxDynamicObject* dyno = wx_dynamic_cast(wxDynamicObject*, frame );
 669         if ( dyno )
 670             trueFrame = wx_dynamic_cast(wxFrame *, dyno->GetSuperClassInstance() );
 671     }
 672
 673     if ( trueFrame )
 674         trueFrame->Show();
 675     else
 676         wxLogError(wxT("Could not show the frame"));
 677 }
 678
 679 void MyFrame::OnGenerateCode(wxCommandEvent& WXUNUSED(event))
 680 {
 681     // ask the user which file to load
 682     wxFileDialog dlg(this, wxT("Which file contains the frame to work on?"),
 683                      wxEmptyString, wxT("test.xml"), wxT("XML files (*.xml)|*.xml"),
 684                      wxFD_OPEN);
 685     if (dlg.ShowModal() == wxID_CANCEL)
 686         return;
 687
 688     // ask the user which file to load
 689     wxFileDialog dlg2(this, wxT("Where should the C++ code be saved?"),
 690                       wxEmptyString, wxT("test.cpp"), wxT("Source files (*.cpp)|*.cpp"),
 691                       wxFD_SAVE);
 692     if (dlg2.ShowModal() == wxID_CANCEL)
 693         return;
 694
 695     // do generate code
 696     if (!GenerateFrameRTTICode(dlg.GetPath(), dlg2.GetPath()))
 697     {
 698         wxLogError(wxT("Could not generate the code for the frame!"));
 699         return;
 700     }
 701
 702     // show the generated code
 703     {
 704         wxFileInputStream f(dlg2.GetPath());
 705         wxStringOutputStream str;
 706         f.Read(str);
 707
 708         wxDialog dlg(this, wxID_ANY, wxT("Generated code"),
 709                      wxDefaultPosition, wxDefaultSize,
 710                      wxRESIZE_BORDER|wxDEFAULT_DIALOG_STYLE);
 711         wxPanel *panel = new wxPanel(&dlg);
 712         wxSizer *sz = new wxBoxSizer(wxVERTICAL);
 713         sz->Add(new wxTextCtrl(panel, wxID_ANY, str.GetString(),
 714                                wxDefaultPosition, wxDefaultSize,
 715                                wxTE_MULTILINE|wxTE_READONLY|wxTE_DONTWRAP),
 716                 1, wxGROW|wxALL, 5);
 717         sz->Add(new wxButton(panel, wxID_OK), 0, wxALIGN_RIGHT|wxALL, 5);
 718         panel->SetSizerAndFit(sz);
 719         dlg.ShowModal();
 720     }
 721 }
 722
 723 void MyFrame::OnDumpClasses(wxCommandEvent& WXUNUSED(event))
 724 {
 725     ClassListDialog dlg(this);
 726     dlg.ShowModal();
 727 }
 728
 729 void MyFrame::OnQuit(wxCommandEvent& WXUNUSED(event))
 730 {
 731     // true is to force the frame to close
 732     Close(true);
 733 }
 734
 735 void MyFrame::OnAbout(wxCommandEvent& WXUNUSED(event))
 736 {
 737     wxMessageBox(wxString::Format(
 738                     wxT("Welcome to %s!\n")
 739                     wxT("\n")
 740                     wxT("This sample demonstrates wxWidgets eXtended RTTI (XTI) system."),
 741                     wxVERSION_STRING
 742                 ),
 743                 wxT("About wxWidgets XTI sample"),
 744                 wxOK | wxICON_INFORMATION,
 745                 this);
 746 }