GetFile.c

/*
    File:       GetFile.c
    
    Description: Whole wack of code just to get a single file...sigh...
 
    Author:     based on code from QTShell sample
 
    Copyright:  © Copyright 2000 Apple Computer, Inc. All rights reserved.
    
    Disclaimer: IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc.
                ("Apple") in consideration of your agreement to the following terms, and your
                use, installation, modification or redistribution of this Apple software
                constitutes acceptance of these terms.  If you do not agree with these terms,
                please do not use, install, modify or redistribute this Apple software.
 
                In consideration of your agreement to abide by the following terms, and subject
                to these terms, Apple grants you a personal, non-exclusive license, under AppleÕs
                copyrights in this original Apple software (the "Apple Software"), to use,
                reproduce, modify and redistribute the Apple Software, with or without
                modifications, in source and/or binary forms; provided that if you redistribute
                the Apple Software in its entirety and without modifications, you must retain
                this notice and the following text and disclaimers in all such redistributions of
                the Apple Software.  Neither the name, trademarks, service marks or logos of
                Apple Computer, Inc. may be used to endorse or promote products derived from the
                Apple Software without specific prior written permission from Apple.  Except as
                expressly stated in this notice, no other rights or licenses, express or implied,
                are granted by Apple herein, including but not limited to any patent rights that
                may be infringed by your derivative works or by other works in which the Apple
                Software may be incorporated.
 
                The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO
                WARRANTIES, EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED
                WARRANTIES OF NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR
                PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS USE AND OPERATION ALONE OR IN
                COMBINATION WITH YOUR PRODUCTS.
 
                IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR
                CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
                GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                ARISING IN ANY WAY OUT OF THE USE, REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION
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                (INCLUDING NEGLIGENCE), STRICT LIABILITY OR OTHERWISE, EVEN IF APPLE HAS BEEN
                ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
                
    Change History (most recent first): <1> 4/1/00 initial release
 
*/
 
#include "GetFile.h"
 
//////////
//
// CreateOpenHandle
// Get the 'open' resource or dynamically create a NavTypeListHandle.
//
//////////
static Handle CreateOpenHandle (OSType theApplicationSignature, short theNumTypes, TypeListPtr theTypeList)
{
    Handle myHandle = NULL;
    
    // see if we have an 'open' resource...
    myHandle = Get1Resource('open', 128);
    if ( myHandle != NULL && ResError() == noErr ) {
        DetachResource( myHandle );
        return myHandle;
    } else {
        myHandle = NULL;
    }
    
    // nope, use the passed in types and dynamically create the NavTypeList
    if (theTypeList == NULL)
        return myHandle;
    
    if (theNumTypes > 0) {
        myHandle = NewHandle(sizeof(NavTypeList) + (theNumTypes * sizeof(OSType)));
        if (myHandle != NULL) {
            NavTypeListHandle   myOpenResHandle = (NavTypeListHandle)myHandle;
            
            (*myOpenResHandle)->componentSignature = theApplicationSignature;
            (*myOpenResHandle)->osTypeCount = theNumTypes;
            BlockMoveData(theTypeList, (*myOpenResHandle)->osType, theNumTypes * sizeof(OSType));
        }
    }
    
    return myHandle;
}
 
//////////
//
// HandleNavEvent
// A callback procedure that handles events while a Navigation Service dialog box is displayed.
//
//////////
static PASCAL_RTN void HandleNavEvent(NavEventCallbackMessage theCallBackSelector, NavCBRecPtr theCallBackParms, void *theCallBackUD)
{
#pragma unused(theCallBackUD)
    // WindowReference      myWindow = NULL;    
    
    if (theCallBackSelector == kNavCBEvent) {
        switch (theCallBackParms->eventData.eventDataParms.event->what) {
        case updateEvt:
            #if TARGET_OS_MAC
                // Handle Update Event
            #endif
            break;
        case nullEvent:
            // Handle Null Event
            break;
        }
    }
}
 
//////////
//
// GetOneFileWithPreview
// Display the appropriate file-opening dialog box, with an optional QuickTime preview pane. If the user
// selects a file, return information about it using the theFSSpecPtr parameter.
//
// Note that both StandardGetFilePreview and NavGetFile use the function specified by theFilterProc as a
// file filter. This framework always passes NULL in the theFilterProc parameter. If you use this function
// in your own code, keep in mind that on Windows the function specifier must be of type FileFilterUPP and 
// on Macintosh it must be of type NavObjectFilterUPP. (You can use the QTFrame_GetFileFilterUPP to create
// a function specifier of the appropriate type.) Also keep in mind that Navigation Services expects a file 
// filter function to return true if a file is to be displayed, while the Standard File Package expects the
// filter to return false if a file is to be displayed.
//
//////////
OSErr GetOneFileWithPreview(short theNumTypes, TypeListPtr theTypeList, FSSpecPtr theFSSpecPtr, void *theFilterProc)
{
    
#if TARGET_OS_WIN32
    StandardFileReply   myReply;
#endif
#if TARGET_OS_MAC
    NavReplyRecord      myReply;
    NavDialogOptions    myDialogOptions;
    NavTypeListHandle   myOpenList = NULL;
    NavEventUPP         myEventUPP = NewNavEventUPP(HandleNavEvent);
#endif
    OSErr               myErr = noErr;
    
    if (theFSSpecPtr == NULL)
        return(paramErr);
 
#if TARGET_OS_WIN32
    // prompt the user for a file
    StandardGetFilePreview((FileFilterUPP)theFilterProc, theNumTypes, (ConstSFTypeListPtr)theTypeList, &myReply);
    if (!myReply.sfGood)
        return(userCanceledErr);
    
    // make an FSSpec record
    myErr = FSMakeFSSpec(myReply.sfFile.vRefNum, myReply.sfFile.parID, myReply.sfFile.name, theFSSpecPtr);
#endif
 
#if TARGET_OS_MAC
    // specify the options for the dialog box
    NavGetDefaultDialogOptions(&myDialogOptions);
    myDialogOptions.dialogOptionFlags -= kNavNoTypePopup;
    myDialogOptions.dialogOptionFlags -= kNavAllowMultipleFiles;
    BlockMoveData(kApplicationName, myDialogOptions.clientName, kApplicationName[0] + 1);
    
    // create a handle to an 'open' resource
    myOpenList = (NavTypeListHandle)CreateOpenHandle(kApplicationSignature, theNumTypes, theTypeList);
    if (myOpenList != NULL)
        HLock((Handle)myOpenList);
    
    // prompt the user for a file
    myErr = NavGetFile(NULL, &myReply, &myDialogOptions, myEventUPP, NULL, (NavObjectFilterUPP)theFilterProc, myOpenList, NULL);
    if ((myErr == noErr) && myReply.validRecord) {
        AEKeyword       myKeyword;
        DescType        myActualType;
        Size            myActualSize = 0;
        
        // get the FSSpec for the selected file
        if (theFSSpecPtr != NULL)
            myErr = AEGetNthPtr(&(myReply.selection), 1, typeFSS, &myKeyword, &myActualType, theFSSpecPtr, sizeof(FSSpec), &myActualSize);
 
        NavDisposeReply(&myReply);
    }
    
    if (myOpenList != NULL) {
        HUnlock((Handle)myOpenList);
        DisposeHandle((Handle)myOpenList);
    }
    
    DisposeNavEventUPP(myEventUPP);
#endif
 
    return(myErr);
}