Developer CD Series 1997 May: Tool Chest/Dev.CD May 97 TC.toast/Sample Code/Snippets/Files/Select Folder w⁄ Gray files/SFGray.c

C/C++ Source or Header | 1993-10-07 | 4.4 KB | 200 lines | [TEXT/KAHL]

#include <Packages.h>
#include <Folders.h>

/*****
 * a structure used to pre-select a folder
 *****/
typedef struct {
    FSSpec                *theFile;
    StandardFileReply    *theReply;
} MyDataRecord;


#define isDirectory     0x0010
#define kReportDlgID    257
#define kSFPutDlgID        256


/*****
 * On first call through CustomGetFile(), set everything so folder specified in
 * myDataPtr->theFile is preselected
 *****/
pascal short dlgHook(short item, DialogPtr theDialog, MyDataRecord *myDataPtr)
{
    if (item == sfHookFirstCall)
    {
        myDataPtr->theReply->sfFile = *(myDataPtr->theFile);

        // the following line ensures the first subfolder in the folder specified
        // is selected.  If we didn't nil out the name, the last subfolder would
        // be selected.
        myDataPtr->theReply->sfFile.name[0] = 0;
        myDataPtr->theReply->sfScript = 0;
        return sfHookChangeSelection;
    }
    return item;
}


/*****
 * Display a folder at the location specified by myFSSpec.  The files within this
 * folder are grayed out.  We return with a full FSSpec, or -1 if user hit cancel.
 *****/
OSErr GetFileGray(FSSpec *myFSSpec)
{
    OSErr            err;

    MyDataRecord    myData;

    /*
     * the default name is used in building a FSSpec for the reply.  It must
     * not be passed in as a null string, or your "select this folder" button
     * won't ever be active.
     */
    Str255                defaultName = "\pMust Not Be Null";
    StandardFileReply    reply;
    Point                where = {-1, -1};        // autocenter, System 7!
    short                activeList[2] = {1, 7};    // only keyboard on file list

    myData.theFile = myFSSpec;
    myData.theReply = &reply;

    CustomPutFile("\p",
                  defaultName,
                  &reply,
                  kSFPutDlgID,
                  where,
                  (DlgHookYDProcPtr)dlgHook,
                  nil,
                  activeList,
                  nil,
                  &myData);
    if (reply.sfGood)
        err = FSMakeFSSpec(reply.sfFile.vRefNum, reply.sfFile.parID, nil, myFSSpec);
    else
        err = -1;        // return some arbitrary error telling us cancel was selected.
    return err;
}


/*****
 * Set up a file spec to point to System file in System Folder
 *****/
OSErr SetUpFile(FSSpec *fileSpec)
{
    OSErr    err;
    short    vRefNum;
    long    dirID;

    err = FindFolder(kOnSystemDisk,kSystemFolderType,kDontCreateFolder, &vRefNum,&dirID);

    if (err) {
        DebugStr("\pFickle FindFolder failed to find fey folder");
        ExitToShell();
    }

    err = FSMakeFSSpec(vRefNum,dirID,"\pSystem",fileSpec);

    if (err) {
        DebugStr("\pFaulty FSMakeFSSpec fails in forming FSSpec.");
        ExitToShell();
    }
    return err;

}

/******
 * Report on what file was selected
 ******/
void Report(FSSpec *theFile)
{
    Str27    vRefNumStr;
    Str27    dirIDStr;

    NumToString(theFile->vRefNum, vRefNumStr);
    NumToString(theFile->parID, dirIDStr);
    ParamText(theFile->name, vRefNumStr,  dirIDStr,  "\p");
    Alert(kReportDlgID, nil);
}

/******
 * Test Displaying folders only, with files within the folders in gray
 ******/
void TestGetFileGray(void)
{
    OSErr    err;
    FSSpec    theFile;

    err = SetUpFile(&theFile);
    if (!err)
    {
        err = GetFileGray(&theFile);
        if (!err)
            Report(&theFile);
    }
}

/******
 * if the isDirectory bit is set, return false (to show the directory)
 * if the isDirectory bit is clear, return true (to filter out all files)
 ******/
pascal Boolean MyStandardFileFilter(CInfoPBPtr pb, MyDataRecord *myDataPtr)
{
    return ( !(pb->dirInfo.ioFlAttrib & isDirectory) );
}

/*****
 * Handle items hit in our dialog
 *****/
pascal short MyDlgFilter(short item, DialogPtr theDialog, MyDataRecord *myDataPtr)
{
    if (item == sfHookFirstCall)
    {
        myDataPtr->theReply->sfFile = *(myDataPtr->theFile);

        // the following line ensures the first subfolder in the folder specified
        // is selected.  If we didn't nil out the name, the last subfolder would
        // be selected.
        myDataPtr->theReply->sfFile.name[0] = 0;
        myDataPtr->theReply->sfScript = 0;
        return sfHookChangeSelection;
    }
    if (item == 10)
        return sfItemOpenButton;
    return item;
}

/*****
 * Test Displaying folder only, with no files within the folders.
 *****/
TestGetFileNoGray()
{
    FSSpec    myFSSpec;
    SFTypeList    typeList;
    StandardFileReply reply;
    Point    where = {-1, -1};
    MyDataRecord myData;

    myData.theFile = &myFSSpec;
    myData.theReply = &reply;

    SetUpFile(&myFSSpec);
    CustomGetFile((FileFilterYDProcPtr)MyStandardFileFilter,
                  -1,
                  typeList,
                  &reply,
                  -6042,
                  where,
                  (DlgHookYDProcPtr)MyDlgFilter,
                  nil,
                  0,
                  nil,
                  &myData);
    if (reply.sfGood)
    {
        FSMakeFSSpec(reply.sfFile.vRefNum, reply.sfFile.parID, nil, &myFSSpec);
        Report(&myFSSpec);
    }
}