src/mac/filedlg.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        filedlg.cpp
   3 // Purpose:     wxFileDialog
   4 // Author:      Stefan Csomor
   5 // Modified by:
   6 // Created:     1998-01-01
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Stefan Csomor
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #ifdef __GNUG__
  13 #pragma implementation "filedlg.h"
  14 #endif
  15
  16 #include "wx/defs.h"
  17 #include "wx/app.h"
  18 #include "wx/utils.h"
  19 #include "wx/dialog.h"
  20 #include "wx/filedlg.h"
  21 #include "wx/intl.h"
  22 #include "wx/tokenzr.h"
  23
  24 #ifndef __DARWIN__
  25   #include "PLStringFuncs.h"
  26 #endif
  27
  28 #if !USE_SHARED_LIBRARY
  29 IMPLEMENT_CLASS(wxFileDialog, wxFileDialogBase)
  30 #endif
  31
  32 // begin wxmac
  33
  34 #include "wx/mac/private.h"
  35
  36 #include <Navigation.h>
  37
  38 #ifdef __DARWIN__
  39 #  include "MoreFilesX.h"
  40 #else
  41 #  include "MoreFiles.h"
  42 #  include "MoreFilesExtras.h"
  43 #endif
  44
  45 extern bool gUseNavServices ;
  46
  47 // the data we need to pass to our standard file hook routine
  48 // includes a pointer to the dialog, a pointer to the standard
  49 // file reply record (so we can inspect the current selection)
  50 // and a copy of the "previous" file spec of the reply record
  51 // so we can see if the selection has changed
  52
  53 struct OpenUserDataRec {
  54   int                currentfilter ;
  55   bool               saveMode ;
  56   wxArrayString      name ;
  57   wxArrayString      extensions ;
  58   wxArrayLong        filtermactypes ;
  59   wxString           defaultLocation;
  60 #if TARGET_CARBON
  61   CFArrayRef         menuitems ;
  62 #else
  63   NavMenuItemSpecArrayHandle menuitems ;
  64 #endif
  65 };
  66
  67 typedef struct OpenUserDataRec
  68 OpenUserDataRec, *OpenUserDataRecPtr;
  69
  70 static pascal void    NavEventProc(
  71                                 NavEventCallbackMessage        inSelector,
  72                                 NavCBRecPtr                    ioParams,
  73                                 NavCallBackUserData            ioUserData);
  74
  75 #if TARGET_CARBON
  76         static NavEventUPP    sStandardNavEventFilter = NewNavEventUPP(NavEventProc);
  77 #else
  78         static NavEventUPP    sStandardNavEventFilter = NewNavEventProc(NavEventProc);
  79 #endif
  80
  81 static pascal void
  82 NavEventProc(
  83     NavEventCallbackMessage        inSelector,
  84     NavCBRecPtr                    ioParams,
  85     NavCallBackUserData    ioUserData    )
  86 {
  87     OpenUserDataRec * data = ( OpenUserDataRec *) ioUserData ;
  88     if (inSelector == kNavCBEvent) {
  89 #if TARGET_CARBON
  90 #else
  91         wxTheApp->MacHandleOneEvent(ioParams->eventData.eventDataParms.event);
  92 #endif
  93     }
  94     else if ( inSelector == kNavCBStart )
  95     {
  96 #if TARGET_CARBON
  97         if (data && !(data->defaultLocation).IsEmpty())
  98         {
  99             // Set default location for the modern Navigation APIs
 100             // Apple Technical Q&A 1151
 101             FSSpec theFSSpec;
 102             wxMacFilename2FSSpec(data->defaultLocation, &theFSSpec);
 103             AEDesc theLocation = {typeNull, NULL};
 104             if (noErr == ::AECreateDesc(typeFSS, &theFSSpec, sizeof(FSSpec), &theLocation))
 105                 ::NavCustomControl(ioParams->context, kNavCtlSetLocation, (void *) &theLocation);
 106         }
 107 #else
 108         if ( data->menuitems )
 109             NavCustomControl(ioParams->context, kNavCtlSelectCustomType, &(*data->menuitems)[data->currentfilter]);
 110 #endif
 111     }
 112     else if ( inSelector == kNavCBPopupMenuSelect )
 113     {
 114         NavMenuItemSpec * menu = (NavMenuItemSpec *) ioParams->eventData.eventDataParms.param ;
 115 #if TARGET_CARBON
 116 #else
 117         if ( menu->menuCreator == 'WXNG' )
 118 #endif
 119         {
 120             data->currentfilter = menu->menuType ;
 121             if ( data->saveMode )
 122             {
 123                 int i = menu->menuType ;
 124                 wxString extension =  data->extensions[i].AfterLast('.') ;
 125                 extension.MakeLower() ;
 126                 wxString sfilename ;
 127
 128 #if TARGET_CARBON
 129                 wxMacCFStringHolder cfString( NavDialogGetSaveFileName( ioParams->context ) , false  );
 130                 sfilename = cfString.AsString() ;
 131 #else
 132                 Str255 filename ;
 133                 // get the current filename
 134                 NavCustomControl(ioParams->context, kNavCtlGetEditFileName, &filename);
 135                 sfilename = wxMacMakeStringFromPascal( filename ) ;
 136 #endif
 137
 138                 int pos = sfilename.Find('.',TRUE) ;
 139                 if ( pos != wxNOT_FOUND )
 140                 {
 141                     sfilename = sfilename.Left(pos+1)+extension ;
 142 #if TARGET_CARBON
 143                     cfString = sfilename ;
 144                     NavDialogSetSaveFileName( ioParams->context , cfString ) ;
 145 #else
 146                     wxMacStringToPascal( sfilename , filename ) ;
 147                     NavCustomControl(ioParams->context, kNavCtlSetEditFileName, &filename);
 148 #endif
 149                 }
 150             }
 151         }
 152     }
 153 }
 154
 155 const wxChar * gfilters[] =
 156 {
 157     wxT("*.TXT") ,
 158     wxT("*.TIF") ,
 159     wxT("*.JPG") ,
 160
 161     NULL
 162 } ;
 163
 164 OSType gfiltersmac[] =
 165 {
 166     'TEXT' ,
 167     'TIFF' ,
 168     'JPEG' ,
 169
 170     '****'
 171 } ;
 172
 173
 174 void MakeUserDataRec(OpenUserDataRec    *myData , const wxString& filter )
 175 {
 176     myData->menuitems = NULL ;
 177     myData->currentfilter = 0 ;
 178     myData->saveMode = FALSE ;
 179
 180     if ( filter && filter[0] )
 181     {
 182         wxString filter2(filter) ;
 183         int filterIndex = 0;
 184         bool isName = true ;
 185         wxString current ;
 186         for( unsigned int i = 0; i < filter2.Len() ; i++ )
 187         {
 188             if( filter2.GetChar(i) == wxT('|') )
 189             {
 190                 if( isName ) {
 191                     myData->name.Add( current ) ;
 192                 }
 193                 else {
 194                     myData->extensions.Add( current.MakeUpper() ) ;
 195                     ++filterIndex ;
 196                 }
 197                 isName = !isName ;
 198                 current = wxEmptyString ;
 199             }
 200             else
 201             {
 202                 current += filter2.GetChar(i) ;
 203             }
 204         }
 205         // we allow for compatibility reason to have a single filter expression (like *.*) without
 206         // an explanatory text, in that case the first part is name and extension at the same time
 207
 208         wxASSERT_MSG( filterIndex == 0 || !isName , wxT("incorrect format of format string") ) ;
 209         if ( current.IsEmpty() )
 210             myData->extensions.Add( myData->name[filterIndex] ) ;
 211         else
 212             myData->extensions.Add( current.MakeUpper() ) ;
 213         if ( filterIndex == 0 || isName )
 214             myData->name.Add( current.MakeUpper() ) ;
 215
 216         ++filterIndex ;
 217
 218         const size_t extCount = myData->extensions.GetCount();
 219         for ( size_t i = 0 ; i < extCount; i++ )
 220         {
 221             int j ;
 222             for ( j = 0 ; gfilters[j] ; j++ )
 223             {
 224                 if ( myData->extensions[i] == gfilters[j]  )
 225                 {
 226                     myData->filtermactypes.Add( gfiltersmac[j] ) ;
 227                     break ;
 228                 }
 229             }
 230             if( gfilters[j] == NULL )
 231             {
 232                 myData->filtermactypes.Add( '****' ) ;
 233             }
 234         }
 235     }
 236 }
 237
 238 static Boolean CheckFile( const wxString &filename , OSType type , OpenUserDataRecPtr data)
 239 {
 240     wxString file(filename) ;
 241     file.MakeUpper() ;
 242
 243     if ( data->extensions.GetCount() > 0 )
 244     {
 245         //for ( int i = 0 ; i < data->numfilters ; ++i )
 246         int i = data->currentfilter ;
 247         if ( data->extensions[i].Right(2) == wxT(".*") )
 248             return true ;
 249
 250         {
 251             if ( type == (OSType)data->filtermactypes[i] )
 252                 return true ;
 253
 254             wxStringTokenizer tokenizer( data->extensions[i] , wxT(";") ) ;
 255             while( tokenizer.HasMoreTokens() )
 256             {
 257                 wxString extension = tokenizer.GetNextToken() ;
 258                 if ( extension.GetChar(0) == '*' )
 259                     extension = extension.Mid(1) ;
 260
 261                 if ( file.Len() >= extension.Len() && extension == file.Right(extension.Len() ) )
 262                     return true ;
 263             }
 264         }
 265         return false ;
 266     }
 267     return true ;
 268 }
 269
 270 #ifndef __DARWIN__
 271 static pascal Boolean CrossPlatformFileFilter(CInfoPBPtr myCInfoPBPtr, void *dataPtr)
 272 {
 273     OpenUserDataRecPtr data = (OpenUserDataRecPtr) dataPtr ;
 274     // return true if this item is invisible or a file
 275
 276     Boolean visibleFlag;
 277     Boolean folderFlag;
 278
 279     visibleFlag = ! (myCInfoPBPtr->hFileInfo.ioFlFndrInfo.fdFlags & kIsInvisible);
 280     folderFlag = (myCInfoPBPtr->hFileInfo.ioFlAttrib & 0x10);
 281
 282     // because the semantics of the filter proc are "true means don't show
 283     // it" we need to invert the result that we return
 284
 285     if ( !visibleFlag )
 286         return true ;
 287
 288     if ( !folderFlag )
 289     {
 290         wxString file = wxMacMakeStringFromPascal( myCInfoPBPtr->hFileInfo.ioNamePtr ) ;
 291         return !CheckFile( file , myCInfoPBPtr->hFileInfo.ioFlFndrInfo.fdType , data ) ;
 292     }
 293
 294     return false ;
 295 }
 296 #endif
 297
 298 // end wxmac
 299
 300 wxFileDialog::wxFileDialog(wxWindow *parent, const wxString& message,
 301         const wxString& defaultDir, const wxString& defaultFileName, const wxString& wildCard,
 302         long style, const wxPoint& pos)
 303              :wxFileDialogBase(parent, message, defaultDir, defaultFileName, wildCard, style, pos)
 304 {
 305     wxASSERT_MSG( NavServicesAvailable() , wxT("Navigation Services are not running") ) ;
 306 }
 307
 308 pascal Boolean CrossPlatformFilterCallback (
 309     AEDesc *theItem,
 310     void *info,
 311     void *callBackUD,
 312     NavFilterModes filterMode
 313 )
 314 {
 315     bool display = true;
 316     OpenUserDataRecPtr data = (OpenUserDataRecPtr) callBackUD ;
 317
 318     if (filterMode == kNavFilteringBrowserList)
 319     {
 320         NavFileOrFolderInfo* theInfo = (NavFileOrFolderInfo*) info ;
 321         if ( !theInfo->isFolder )
 322         {
 323             if (theItem->descriptorType == typeFSS )
 324             {
 325                 FSSpec    spec;
 326                 memcpy( &spec , *theItem->dataHandle , sizeof(FSSpec) ) ;
 327                 wxString file = wxMacMakeStringFromPascal( spec.name ) ;
 328                 display = CheckFile( file , theInfo->fileAndFolder.fileInfo.finderInfo.fdType , data ) ;
 329             }
 330  #if TARGET_CARBON
 331             else if ( theItem->descriptorType == typeFSRef )
 332             {
 333                 FSRef fsref ;
 334                 memcpy( &fsref , *theItem->dataHandle , sizeof(FSRef) ) ;
 335                 wxString file ;
 336                 const short maxpath = 1024 ;
 337                 FSRefMakePath( &fsref , (UInt8*) file.GetWriteBuf(maxpath+1),maxpath) ;
 338                 file.UngetWriteBuf() ;
 339                 display = CheckFile( file , theInfo->fileAndFolder.fileInfo.finderInfo.fdType , data ) ;
 340             }
 341 #endif
 342         }
 343     }
 344
 345     return display;
 346 }
 347
 348 int wxFileDialog::ShowModal()
 349 {
 350 #if TARGET_CARBON
 351     OSErr err;
 352     NavDialogCreationOptions dialogCreateOptions;
 353     // set default options
 354     ::NavGetDefaultDialogCreationOptions(&dialogCreateOptions);
 355
 356     // this was always unset in the old code
 357     dialogCreateOptions.optionFlags &= ~kNavSelectDefaultLocation;
 358
 359 #if wxUSE_UNICODE
 360     // tried using wxMacCFStringHolder in the code below, but it seems
 361     // the CFStrings were being released before the save dialog was called,
 362     // causing a crash - open dialog works fine with or without wxMacCFStringHolder
 363     CFStringRef titleRef = ::CFStringCreateWithCString(NULL,
 364                                                        m_message.wc_str(),
 365                                                        kCFStringEncodingUnicode);
 366 #else
 367     CFStringRef titleRef = ::CFStringCreateWithCString(NULL,
 368                                                        m_message.c_str(),
 369                                                        CFStringGetSystemEncoding());
 370 #endif
 371     dialogCreateOptions.windowTitle = titleRef;
 372 #if wxUSE_UNICODE
 373     CFStringRef defaultFileNameRef = ::CFStringCreateWithCString(NULL,
 374                                                                  m_fileName.wc_str(),
 375                                                                  kCFStringEncodingUnicode);
 376 #else
 377     CFStringRef defaultFileNameRef = ::CFStringCreateWithCString(NULL,
 378                                                                  m_fileName.c_str(),
 379                                                                  CFStringGetSystemEncoding());
 380 #endif
 381     dialogCreateOptions.saveFileName = defaultFileNameRef;
 382     NavDialogRef dialog;
 383     NavObjectFilterUPP navFilterUPP = NULL;
 384     CFArrayRef cfArray = NULL;  // for popupExtension
 385     OpenUserDataRec myData;
 386     myData.defaultLocation = m_dir;
 387
 388     if (m_dialogStyle & wxSAVE)
 389     {
 390         dialogCreateOptions.optionFlags |= kNavNoTypePopup;
 391         dialogCreateOptions.optionFlags |= kNavDontAutoTranslate;
 392         dialogCreateOptions.optionFlags |= kNavDontAddTranslateItems;
 393
 394         // The extension is important
 395         dialogCreateOptions.optionFlags |= kNavPreserveSaveFileExtension;
 396
 397
 398         err = ::NavCreatePutFileDialog(&dialogCreateOptions,
 399                                       'TEXT',
 400                                       'TEXT',
 401                                       sStandardNavEventFilter,
 402                                       &myData, // for defaultLocation
 403                                       &dialog);
 404     }
 405     else
 406     {
 407         MakeUserDataRec(&myData , m_wildCard);
 408         int numfilters = myData.extensions.GetCount();
 409         if (numfilters > 0){
 410         CFMutableArrayRef popup = CFArrayCreateMutable( kCFAllocatorDefault ,
 411             numfilters , &kCFTypeArrayCallBacks ) ;
 412         dialogCreateOptions.popupExtension = popup ;
 413         myData.menuitems = dialogCreateOptions.popupExtension ;
 414         for ( size_t i = 0 ; i < numfilters ; ++i )
 415         {
 416             CFArrayAppendValue( popup , (CFStringRef) wxMacCFStringHolder( myData.name[i] ) ) ;
 417         }
 418     }
 419         navFilterUPP = NewNavObjectFilterUPP(CrossPlatformFilterCallback);
 420         err = ::NavCreateGetFileDialog(&dialogCreateOptions,
 421                                        NULL, // NavTypeListHandle
 422                                        sStandardNavEventFilter,
 423                                        NULL, // NavPreviewUPP
 424                                        navFilterUPP,
 425                                        (void *) &myData, // inClientData
 426                                        &dialog);
 427     }
 428
 429     if (err == noErr)
 430         err = ::NavDialogRun(dialog);
 431
 432     // clean up filter related data, etc.
 433     if (navFilterUPP)
 434         ::DisposeNavObjectFilterUPP(navFilterUPP);
 435     if (cfArray)
 436     {
 437         CFIndex n = ::CFArrayGetCount(cfArray);
 438         for (CFIndex i = 0; i < n; i++)
 439         {
 440             CFStringRef str = (CFStringRef) ::CFArrayGetValueAtIndex(cfArray, i);
 441             if (str)
 442                 ::CFRelease(str);
 443         }
 444         ::CFRelease(cfArray);
 445     }
 446     if (titleRef)
 447         ::CFRelease(titleRef);
 448     if (defaultFileNameRef)
 449         ::CFRelease(defaultFileNameRef);
 450     if (err != noErr)
 451         return wxID_CANCEL;
 452
 453     NavReplyRecord navReply;
 454     err = ::NavDialogGetReply(dialog, &navReply);
 455     if (err == noErr && navReply.validRecord)
 456     {
 457         AEKeyword   theKeyword;
 458         DescType    actualType;
 459         Size        actualSize;
 460         FSRef       theFSRef;
 461         char        thePath[FILENAME_MAX];
 462
 463         long count;
 464         ::AECountItems(&navReply.selection , &count);
 465         for (long i = 1; i <= count; ++i)
 466         {
 467             err = ::AEGetNthPtr(&(navReply.selection), 1, typeFSRef, &theKeyword, &actualType,
 468                                 &theFSRef, sizeof(theFSRef), &actualSize);
 469             if (err != noErr)
 470                 break;
 471
 472             if (m_dialogStyle & wxSAVE)
 473             {
 474                 thePath[0] = '\0';
 475                 CFURLRef parentURLRef = ::CFURLCreateFromFSRef(NULL, &theFSRef);
 476
 477                 if (parentURLRef)
 478                 {
 479                     CFURLRef fullURLRef =
 480                         ::CFURLCreateCopyAppendingPathComponent(NULL,
 481                                                                 parentURLRef,
 482                                                                 navReply.saveFileName,
 483                                                                 false);
 484                     ::CFRelease(parentURLRef);
 485                     if (fullURLRef)
 486                     {
 487                         CFStringRef cfString = ::CFURLCopyPath(fullURLRef);
 488                         ::CFRelease(fullURLRef);
 489
 490                         if (cfString)
 491                         {
 492                             // unescape the URL for
 493                             // "file name" instead of "file%20name"
 494                             CFStringRef cfStringUnescaped =
 495                                 ::CFURLCreateStringByReplacingPercentEscapes(NULL,
 496                                                                              cfString,
 497                                                                              CFSTR(""));
 498                             ::CFRelease(cfString);
 499
 500                             if (cfStringUnescaped)
 501                             {
 502 #if wxUSE_UNICODE
 503                                 ::CFStringGetCString(cfStringUnescaped,
 504                                                     thePath,
 505                                                     FILENAME_MAX,
 506                                                     kCFStringEncodingUnicode);
 507 #else
 508                                 ::CFStringGetCString(cfStringUnescaped,
 509                                                     thePath,
 510                                                     FILENAME_MAX,
 511                                                     CFStringGetSystemEncoding());
 512 #endif
 513                                 ::CFRelease(cfStringUnescaped);
 514                             }
 515                         }
 516                     }
 517                 }
 518                 if (!thePath[0])
 519                 {
 520                     ::NavDisposeReply(&navReply);
 521                     return wxID_CANCEL;
 522                 }
 523             }
 524             else
 525             {
 526                 err = ::FSRefMakePath(&theFSRef,
 527                                         (UInt8 *)thePath, sizeof(thePath));
 528                 if (err != noErr)
 529                     break;
 530             }
 531             m_path = thePath;
 532             m_paths.Add(m_path);
 533             m_fileName = wxFileNameFromPath(m_path);
 534             m_fileNames.Add(m_fileName);
 535         }
 536         // set these to the first hit
 537         m_path = m_paths[0];
 538         m_fileName = wxFileNameFromPath(m_path);
 539         m_dir = wxPathOnly(m_path);
 540     }
 541     ::NavDisposeReply(&navReply);
 542
 543     return (err == noErr) ? wxID_OK : wxID_CANCEL;
 544 #else // TARGET_CARBON
 545
 546     NavDialogOptions           mNavOptions;
 547     NavObjectFilterUPP           mNavFilterUPP = NULL;
 548     NavPreviewUPP           mNavPreviewUPP = NULL ;
 549     NavReplyRecord           mNavReply;
 550     AEDesc               mDefaultLocation ;
 551     bool               mSelectDefault = false ;
 552     OSStatus            err = noErr ;
 553     // setup dialog
 554
 555     mNavFilterUPP    = nil;
 556     mNavPreviewUPP    = nil;
 557     mSelectDefault    = false;
 558     mDefaultLocation.descriptorType = typeNull;
 559     mDefaultLocation.dataHandle     = nil;
 560
 561     NavGetDefaultDialogOptions(&mNavOptions);
 562     wxMacStringToPascal( m_message , (StringPtr)mNavOptions.message ) ;
 563     wxMacStringToPascal( m_fileName , (StringPtr)mNavOptions.savedFileName ) ;
 564
 565     // Set default location, the location
 566     //   that's displayed when the dialog
 567     //   first appears
 568
 569     FSSpec location ;
 570     wxMacFilename2FSSpec( m_dir , &location ) ;
 571
 572     err = ::AECreateDesc(typeFSS, &location, sizeof(FSSpec), &mDefaultLocation );
 573
 574     if ( mDefaultLocation.dataHandle ) {
 575
 576         if (mSelectDefault) {
 577             mNavOptions.dialogOptionFlags |= kNavSelectDefaultLocation;
 578         } else {
 579             mNavOptions.dialogOptionFlags &= ~kNavSelectDefaultLocation;
 580         }
 581     }
 582
 583     memset( &mNavReply , 0 , sizeof( mNavReply ) ) ;
 584     mNavReply.validRecord = false;
 585     mNavReply.replacing = false;
 586     mNavReply.isStationery = false;
 587     mNavReply.translationNeeded = false;
 588     mNavReply.selection.descriptorType = typeNull;
 589     mNavReply.selection.dataHandle = nil;
 590     mNavReply.keyScript = smSystemScript;
 591     mNavReply.fileTranslation = nil;
 592     mNavReply.version = kNavReplyRecordVersion ;
 593
 594     // zero all data
 595
 596     m_path = wxEmptyString ;
 597     m_fileName = wxEmptyString ;
 598     m_paths.Empty();
 599     m_fileNames.Empty();
 600
 601     OpenUserDataRec            myData;
 602     MakeUserDataRec( &myData , m_wildCard ) ;
 603     myData.currentfilter = m_filterIndex ;
 604     if ( myData.extensions.GetCount() > 0 )
 605     {
 606         mNavOptions.popupExtension = (NavMenuItemSpecArrayHandle) NewHandle( sizeof( NavMenuItemSpec ) * myData.extensions.GetCount() ) ;
 607         myData.menuitems = mNavOptions.popupExtension ;
 608         for ( size_t i = 0 ; i < myData.extensions.GetCount() ; ++i )
 609         {
 610             (*mNavOptions.popupExtension)[i].version     = kNavMenuItemSpecVersion ;
 611             (*mNavOptions.popupExtension)[i].menuCreator = 'WXNG' ;
 612             // TODO : according to the new docs  -1 to 10 are reserved for the OS
 613             (*mNavOptions.popupExtension)[i].menuType    = i ;
 614             wxMacStringToPascal( myData.name[i] , (StringPtr)(*mNavOptions.popupExtension)[i].menuItemName ) ;
 615         }
 616     }
 617     if ( m_dialogStyle & wxSAVE )
 618     {
 619         myData.saveMode = true ;
 620
 621         mNavOptions.dialogOptionFlags |= kNavDontAutoTranslate ;
 622         mNavOptions.dialogOptionFlags |= kNavDontAddTranslateItems ;
 623
 624         err = ::NavPutFile(
 625                            &mDefaultLocation,
 626                            &mNavReply,
 627                            &mNavOptions,
 628                            sStandardNavEventFilter ,
 629                            NULL,
 630                            kNavGenericSignature,
 631                            &myData);                    // User Data
 632         m_filterIndex = myData.currentfilter ;
 633     }
 634     else
 635     {
 636         myData.saveMode = false ;
 637
 638         mNavFilterUPP = NewNavObjectFilterUPP( CrossPlatformFilterCallback ) ;
 639         if ( m_dialogStyle & wxMULTIPLE )
 640             mNavOptions.dialogOptionFlags |= kNavAllowMultipleFiles ;
 641         else
 642             mNavOptions.dialogOptionFlags &= ~kNavAllowMultipleFiles ;
 643
 644         err = ::NavGetFile(
 645                            &mDefaultLocation,
 646                            &mNavReply,
 647                            &mNavOptions,
 648                            sStandardNavEventFilter ,
 649                            mNavPreviewUPP,
 650                            mNavFilterUPP,
 651                            NULL ,
 652                            &myData);
 653         m_filterIndex = myData.currentfilter ;
 654     }
 655
 656     DisposeNavObjectFilterUPP(mNavFilterUPP);
 657     if ( mDefaultLocation.dataHandle != nil )
 658     {
 659         ::AEDisposeDesc(&mDefaultLocation);
 660     }
 661
 662     if ( (err != noErr) && (err != userCanceledErr) ) {
 663         return wxID_CANCEL ;
 664     }
 665
 666     if (mNavReply.validRecord) {
 667
 668         FSSpec  outFileSpec ;
 669         AEDesc specDesc ;
 670         AEKeyword keyWord ;
 671
 672         long count ;
 673         ::AECountItems( &mNavReply.selection , &count ) ;
 674         for ( long i = 1 ; i <= count ; ++i )
 675         {
 676             OSErr err = ::AEGetNthDesc( &mNavReply.selection , i , typeFSS, &keyWord , &specDesc);
 677             if ( err != noErr ) {
 678                 m_path = wxT("") ;
 679                 return wxID_CANCEL ;
 680             }
 681             outFileSpec = **(FSSpec**) specDesc.dataHandle;
 682             if (specDesc.dataHandle != nil) {
 683                 ::AEDisposeDesc(&specDesc);
 684             }
 685             m_path = wxMacFSSpec2MacFilename( &outFileSpec ) ;
 686
 687             m_paths.Add( m_path ) ;
 688             m_fileName = wxFileNameFromPath(m_path);
 689             m_fileNames.Add(m_fileName);
 690         }
 691         // set these to the first hit
 692         m_path = m_paths[ 0 ] ;
 693         m_fileName = wxFileNameFromPath(m_path);
 694         m_dir = wxPathOnly(m_path);
 695         NavDisposeReply( &mNavReply ) ;
 696         return wxID_OK ;
 697     }
 698     return wxID_CANCEL;
 699 #endif // TARGET_CARBON
 700 }
 701