don't assert when creating an initially empty wxCB_READONLY combobox

[wxWidgets.git] / src / mac / dirdlg.cpp

/////////////////////////////////////////////////////////////////////////////
// Name:        dirdlg.cpp
// Purpose:     wxDirDialog
// Author:      Stefan Csomor
// Modified by:
// Created:     1998-01-01
// RCS-ID:      $Id$
// Copyright:   (c) Stefan Csomor
// Licence:       wxWindows licence
/////////////////////////////////////////////////////////////////////////////

#ifdef __GNUG__
#pragma implementation "dirdlg.h"
#endif

#include "wx/defs.h"
#include "wx/utils.h"
#include "wx/dialog.h"
#include "wx/dirdlg.h"

#include "wx/cmndata.h"

#include "wx/mac/private.h"

#ifdef __DARWIN__
  #include <Carbon/Carbon.h>
#else
  #include <Navigation.h>
#endif

#if !USE_SHARED_LIBRARY
IMPLEMENT_CLASS(wxDirDialog, wxDialog)
#endif

wxDirDialog::wxDirDialog(wxWindow *parent,
                         const wxString& message,
                         const wxString& defaultPath,
                         long style,
                         const wxPoint& WXUNUSED(pos),
                         const wxSize& WXUNUSED(size),
                         const wxString& WXUNUSED(name))
{
    wxASSERT_MSG( NavServicesAvailable() , wxT("Navigation Services are not running") ) ;
    m_message = message;
    m_dialogStyle = style;
    m_parent = parent;
    m_path = defaultPath;
}

int wxDirDialog::ShowModal()
{
    NavDialogOptions        mNavOptions;
    NavObjectFilterUPP        mNavFilterUPP = NULL;
    NavPreviewUPP            mNavPreviewUPP = NULL ;
    NavReplyRecord            mNavReply;
    AEDesc*                    mDefaultLocation = NULL ;
    bool                    mSelectDefault = false ;
    
    ::NavGetDefaultDialogOptions(&mNavOptions);

    mNavFilterUPP    = nil;
    mNavPreviewUPP    = nil;
    mSelectDefault    = false;
    mNavReply.validRecord                = false;
    mNavReply.replacing                    = false;
    mNavReply.isStationery                = false;
    mNavReply.translationNeeded            = false;
    mNavReply.selection.descriptorType = typeNull;
    mNavReply.selection.dataHandle        = nil;
    mNavReply.keyScript                    = smSystemScript;
    mNavReply.fileTranslation            = nil;
    
    // Set default location, the location
    //   that's displayed when the dialog
    //   first appears
    
    if ( mDefaultLocation ) {
        
        if (mSelectDefault) {
            mNavOptions.dialogOptionFlags |= kNavSelectDefaultLocation;
        } else {
            mNavOptions.dialogOptionFlags &= ~kNavSelectDefaultLocation;
        }
    }
    
    OSErr err = ::NavChooseFolder(
                        mDefaultLocation,
                        &mNavReply,
                        &mNavOptions,
                        NULL,
                        mNavFilterUPP,
                        0L);                            // User Data
    
    if ( (err != noErr) && (err != userCanceledErr) ) {
        m_path = wxT("") ;
        return wxID_CANCEL ;
    }

    if (mNavReply.validRecord) {        // User chose a folder
    
        FSSpec    folderInfo;
        FSSpec  outFileSpec ;
        AEDesc specDesc ;
        
        OSErr err = ::AECoerceDesc( &mNavReply.selection , typeFSS, &specDesc);
        if ( err != noErr ) {
            m_path = wxT("") ;
            return wxID_CANCEL ;
        }            
        folderInfo = **(FSSpec**) specDesc.dataHandle;
        if (specDesc.dataHandle != nil) {
            ::AEDisposeDesc(&specDesc);
        }

//            mNavReply.GetFileSpec(folderInfo);
        
            // The FSSpec from NavChooseFolder is NOT the file spec
            // for the folder. The parID field is actually the DirID
            // of the folder itself, not the folder's parent, and
            // the name field is empty. We must call PBGetCatInfo
            // to get the parent DirID and folder name
        
        Str255        name;
        CInfoPBRec    thePB;            // Directory Info Parameter Block
        thePB.dirInfo.ioCompletion    = nil;
        thePB.dirInfo.ioVRefNum        = folderInfo.vRefNum;    // Volume is right
        thePB.dirInfo.ioDrDirID        = folderInfo.parID;        // Folder's DirID
        thePB.dirInfo.ioNamePtr        = name;
        thePB.dirInfo.ioFDirIndex    = -1;    // Lookup using Volume and DirID
        
        err = ::PBGetCatInfoSync(&thePB);
        if ( err != noErr ) {
            m_path = wxT("")  ;
            return wxID_CANCEL ;
        }            
                                            // Create cannonical FSSpec
        ::FSMakeFSSpec(thePB.dirInfo.ioVRefNum, thePB.dirInfo.ioDrParID,
                       name, &outFileSpec);
                        
        // outFolderDirID = thePB.dirInfo.ioDrDirID;
        m_path = wxMacFSSpec2MacFilename( &outFileSpec ) ;
        return wxID_OK ;
    }
    return wxID_CANCEL;
}