Developer CD Series 1997 May: Tool Chest/Dev.CD May 97 TC.toast/Sample Code/Files/StdFile/StdFile.p

Text File | 1994-11-18 | 101.9 KB | 3,104 lines | [TEXT/MPS ]

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
#
#         Apple Macintosh Developer Technical Support
#
#         Standard File Sample Application
#
#         StdFile
#
#         StdFile.p        -        Pascal Source
#
#         Copyright © 1989 Apple Computer, Inc.
#         All rights reserved.
#
#    Versions:
#                1.00                04/89
#                2.00                05/90
#                2.01                06/92
#
#    Components:
#                StdFile.p            April 1, 1989
#                StdFile.h            April 1, 1988
#                StdFile.r            April 1, 1988
#                PStdFile.make        April 1, 1988
#
# ----------
# OBJECTIVES
# ----------
# This program attempts to demonstrate the following techniques:
#
# - Normal use of SFGetFile and SFPutFile
# - Normal use of SFPGetFile and SFPPutFile.  This includes use of Custom
#   Dialogs with handling of extra items through the implementation of a
#   Standard File Dialog Hook.
#     - First time initialization
#     - Extra Simple buttons (Disory/ThisDir/Options)
#     - Radio buttons (file format, types of files to show)
#     - Aliasing click on some buttons to clicks on other buttons
#     - Regenerating the list of files displayed
# - Creating a full pathname from the reply record (using Working Directories
#   or DirID)
# - Selecting a directory (ala MPW's "GetFileName -d")
# - Simple file filter (checks file type)
# - Complex file filter (looking inside the file)
# - Adding and deleting and extra List Manager lists.  This is shown for both
#   SFGetFile and SFPutFile.
# - Select multiple files by adding a second list to the Dialog Box.
# - Setting the starting Directory/Volume
# - Describe pending update event clogging
# - Ask the user to select a file, and then remember where it is the next
#   time the application is launched.
#
# --------------------------
# Standard File Generalities
# --------------------------
#
# The prompt string of SFGetFile is ignored in all calls.  As noted on page
# I-523 of Inside Mac, it is there for historical reasons only.  The
# Standard File package is built around a modal dialog window.  Standard
# File repeatedly calls ModalDialog waiting for user events.  It is
# possible for an application to hook into the dialog event loop by using
# the following methods.
#
# File Filter
# -----------
# The file filter is called to give the application opportunity to filter
# out files that is wishes not to be shown in the dialog.  This file filter
# is called before displaying the dialog, which is also before the Dialog
# Hook or Dialog Filter are called.  If this function returns TRUE, this
# means the file should not be shown in the list.  In other words the file
# is to be filtered from the user.
#
# Dialog Hook
# -----------
# The dialog hook is called after Standard File calls ModalDialog.  The
# hook is a function that requires that an item number be passed back from
# it.  Normally, this is the same item number that was passed to us, but
# not necessarily.  For instance, we could return values that cause the
# file names to be re-drawn or have the whole event ignored.  Before the
# dialog is drawn, our dialog hook gets called with a -1.  This gives us
# the opportunity to change things like Button titles, etc.  It's in
# important to note that Standard File seems to ignore the item returned by
# the dialog hook when it is called the first time.  The dialog hook will
# also be passed a fake item of 100, which is used to mean a nullEvent.
# This can be used as an idle event for the dialog hook.
#
# Dialog Filter
# -------------
# This is used in the SFPGetFile and SFPPutFile routines.  It is for the
# advanced versions of calling Standard File for programmers that desire a
# custom dialog window.  The dialog filter is the same filter procedure
# used by the Dialog Manager.  In the call to ModalDialog, you can supply a
# filter.  The dialog filter used by Standard File is passed to
# ModalDialog.  This filter is called by the Dialog Manager after it calls
# GetNextEvent.  This gives the filter the first opportunity to handle the
# event.  If the dialog filter returns TRUE, this tells the Dialog Manager
# that the filter has handled the event.  You will use the dialog filter to
# handle items you've added to your custom dialog.
#
#~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
PROGRAM SFSample;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
USES
    Types, QuickDraw, ToolUtils, Events, Controls, Windows, Dialogs,
    Menus, Devices, SegLoad, Files, Traps, Fonts, Resources, Memory,
    Packages, Lists, DiskInit, Script, LowMem, CursorCtl, Errors, FixMath,
    GestaltEqu, StandardFile;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
CONST

{k prefix for constants, r for resources, m for menu, i for menu item,
and s for string resource item}

{Resource ID's for some alerts}
    rAboutAlert            = 1000;             {the about dialog}
    rExitAlert            = 1001;             {emergency exit user alert}
    rUserAlert            = 1002;             {error message user alert}
    rFInfoAlert            = 1003;                {display file info alert}
    rShowSelectionAlert    = 1004;

{Resource ID's for my Standard File Dialogs}
    rListGetDLOG        = 2000;
    kFileListItem        = 11;                {Item number for list of files}
    kMultiOpenItem        = 12;                {Item number of multiple Open files}
    kRemoveItem            = 13;                {Item number of Remove button}

    rSFPGetFileDLOG     = 2001;
    kTextButton            = 11;                {DoNormalPGet dialog items}
    kAppButton            = 12;

    rSFPPutFileDLOG     = 2002;
    kSFPPutNormalBtn    = 9;                {SFPPutFile with a Dialog Hook}
    kSFPPutTextBtn        = 10;
    kSFPPutFreeSpace    = 11;

    rGetDirectoryDLOG    = 2003;
    kGetDirButton        = 11;                {DoGetDirectory dialog items}
    kGetDirNowButton     = 12;
    kGetDirMessage        = 13;

    rPutListsFileDLOG    = 2004;
    kListItem            = 9;                {ListPut dialog items}
    kReplaceItem        = 2;

    rOptionsDLOG        = 2005;
    kOptionsButton        = 9;                {Put Options dialog items}
    kFormatString        = 10;

    rOptionsSubDLOG     = 2006;
    kDefaultFormat        = 3;                {Put Sub-Options dialog items}
    kFrameItem            = 9;

    rGetIdleUpdates        = 2007;
    kTimeItem            = 11;                {DoIdleUpdates dialog items}
    kSizeItem            = 12;

    kExistingFileALRT    = -3996;            {"Replace file?" dialog ID from System file}

{menu resources; m for menu and i for menu item}
    rMenuBar            = 1000;                {Menu resources}

    mApple                = 128;                {indexes for Apple menu items}
    iAboutMe            = 1;

    mFile                = 129;                {indexes for File menu items}
    iQuit                = 12;

    mEdit                = 130;                {indexes for Edit menu items}
    iUndo                = 1;
    iCut                = 3;
    iCopy                = 4;
    iPaste                = 5;
    iClear                = 6;

    mSFExamples            = 131;                {indexes for Examples menu items}
    iNormalGet            = 1;
    iNormalPGet         = 2;
    iFileFilter         = 3;
    iGetDirectory        = 4;
    iMultiFile            = 5;

    iNormalPut            = 7;
    iNormalPPut         = 8;
    iForceDirectory     = 9;
    iPutListsFile        = 10;
    iPutOptions         = 11;

    iIdleUpdates        = 13;
    iRememberFile        = 14;

{Miscellaneous Strings from Str# resource}
    rStrMisc            = 1000;
    sKFree                = 1;                {K free}
    sSelectFolder        = 2;                {Select a Folder}
    sSelectedCancel        = 3;                {The Cancel button.}
    sSaveAsMsg            = 4;                {Save As…}
    sTempFName            = 5;                {suffix of temporary file name}
    sFileSize            = 6;                {K on disk}

    rStrList            = 1001;                {Used to create a List Manager list}

    rErrStrings         = 1002;             {error String Str# ID}
    sStandardErr        = 1;                {An error has occurred.}
    sMemErr             = 2;                {A Memory Manager error has occurred.}
    sResErr             = 3;                {A Resource Manager error has occurred.}
    sLowMemory            = 4;                {Memory is too low to continue...}
    sNoMenus            = 5;                {Could not find application's menu...}
    sFileSystem            = 6;                {A File System error has occurred.}
    sLostFile            = 7;                {The file to be remembered has been lost}
    sOldAUX                = 8;                {Requires A/UX version 2.0 or later.}
    sNoHFS                = 9;                {Requires a System that supports HFS}

{Useful Stadard File constants}
    kSFTopLeft            = $00500050;        {topLeft corner of Standard File dialog}
    kReDrawList            = 101;                {causes the file list to be recalculated}
    kShowAllFiles        = -1;                {show all files in the StdFile list}
    kShowIt             = FALSE;            {FALSE means I do not filter out...}
    kNoSelection        = 0;                {reply.fType is NIL for no selection}
    kNullModalEvt        = 100;                {Item number for null event from ModalDialog}
    kNoItem                = 0;                {no item, ignore it}
    kFirstTime            = -1;                {the first time our hook it's passed a -1}

{Useful File Manager constants}
    kFSAsynch             = TRUE;                {asynchronous File Manager call}
    kInvisibleBit        = 14;                {bit set in ioFlFndrInfo.fdFlags if invisible}
    kFolderBit            = 4;                {bit set in ioFlAttrib for a folder}

{misc. application constants}
    kScrollbarWidth     = 16;                {kScrollBarWidth can be used in
                                             calculating values for control
                                             positioning and sizing.}
    kScrollbarAdjust    = kScrollbarWidth - 1;

    kListFrameInset     = 1;                {inset rectangle adjustment for list frame}
    kCntlActivate        = 0;                {enabled control’s hilite state}
    kCntlDeactivate     = $FF;                {disabled control’s hilite state}
    kCntlOn             = 1;                {control’s value when truned on}
    kCntlOff            = 0;                {control’s value when truned off}
    kButtonFrameSize    = 3;                {button frame’s pen size}
    kButtonFrameInset    = - 4;                {inset rectangle adjustment around button}
    kSysEnvironsVersion = 1;                {Version of the SysEnvRec I understand.}
    kBroughtToFront        = 3;                {Number of get event calls to pull us forward}
    kWantSeconds        = TRUE;             {IUTimeString flag for using seconds}
    kMinSpace            = 32 * 1024;        {minimum available memory I allow in heap}
    kMinAUXVersion        = $200;                {minimum version of A/UX I'll run with}
    kDefaultAUXVersion    = $100;                {assumed version 1.x.x of A/UX}
    rUpdateWindow        = 1000;                {WIND resource for updates}
    rMemorizedFile        = 1000;                {FILE resource of file to remember}
    kNumberOfMasters    = 1;                {number of master pointer blocks}
    rAppSignature        = 'sc18';            {app signature/creator ID}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
TYPE

{This record is enough to specify a file before rebooting.  File names were limited
to 63 chars with MFS, but HFS limits names to 31 chars}

    FileSpec            = RECORD
        vRefNum:        INTEGER;
        parID:            LONGINT;
        name:            Str63;
    END;
    FileSpecList        = ARRAY[1..1000] OF FileSpec;
    FileSpecPtr            = ^FileSpecList;
    FileSpecHdl            = ^FileSpecPtr;

{This record is enough to specify a file after rebooting.  This record is kept
as a resource when the user selects a file.}

    FileDesc            = RECORD
        volName:        Str27;                {volume names are limited to 27 chars}
        parID:            LONGINT;
        name:            Str63;                {file names are limited to 63 chars}
    END;
    FileDescPtr            = ^FileDesc;
    FileDescHdl            = ^FileDescPtr;

{This record is used for the unsigned long integers which Pascal really doesn't handle}

    TwoIntsMakesALong    = RECORD            {build a signed LONGINT...}
        CASE INTEGER OF                     {...from an unsigned INTEGER}
            1:
                (long:    LONGINT);
            2:
                (ints:    ARRAY [0..1] OF INTEGER);
        END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
VAR

{gMac is used to hold the result of a SysEnvirons call. This makes it
 convenient for any routine to check the environment. It is considered
 global information, anyway.}

    gMac:                SysEnvRec;            {set up by Initialize}

{gInBackground is maintained by our osEvent handling routines. Any part of
 the program can check it to find out if it is currently in the background.}

    gInBackground:         BOOLEAN;            {maintained by Initialize and EventLoop}

{This determines if we can call WaitNextEvent, which is always present for any
 System 6.0x user but only possible for earilier systems running MultiFinder.}

    gHasWaitNextEvent:     BOOLEAN;            {set by Initialize}

{These next three globals are used to remember the application's location.
This is the volume and the folder that hold the application at launch time.}

    gAppName:            Str255;                {application's name}
    gAppParID:            LONGINT;            {dirID of application's folder}
    gAppVRefNum:        INTEGER;            {volume containing application}

{Sometimes it is necessary to have a global SFReply record.}

    gReply:                SFReply;            {used in some SF samples}

{This is a flag used to signal a normal file format or not used in a couple examples.}

    gNormal:            BOOLEAN;

{This is a handle to an array of my FileSpecs.  It is accessed by a few routines, so
it needed to be global.}

    gMultiFiles:        FileSpecHdl;        {array of files to open}

{This is a handle to a List Manager list.  It is accessed by a few routines, so
it needed to be global.}

    gListHandle:        ListHandle;         {list use for multiple get files}

{This is the selected dirID that the user selected while in SFGet.}

    gMyCurDir:            LONGINT;            {for SetDirectory sample}

{This is a string set by a few of the examples used to determine which file format
the user wanted to save the file as.}

    gPutFormat:            Str255;                {string of file format}

    gLsBkUp:            LONGINT;


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Initialize}

FUNCTION NumToolboxTraps: INTEGER;

{InitGraf is always implemented (trap $A86E). If the trap table is big
 enough, trap $AA6E will always point to either Unimplemented or some other
 trap, but will never be the same as InitGraf. Thus, you can check the size
 of the trap table by asking if the address of trap $A86E is the same as $AA6E.}

BEGIN
    IF NGetTrapAddress(_InitGraf, ToolTrap) = NGetTrapAddress($AA6E, ToolTrap) THEN
        NumToolboxTraps := $200
    ELSE
        NumToolboxTraps := $400;
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Initialize}

FUNCTION GetTrapType(theTrap: INTEGER): TrapType;

{Determines the type of a trap based on its trap number. If bit 11 is clear,
 then it is an OS trap. Otherwise, it is a Toolbox trap.}

BEGIN
    { OS traps start with A0, Tool with A8 or AA. }
    IF BAND(theTrap, $0800) = 0 THEN            {per Darin}
        GetTrapType := OSTrap
    ELSE
        GetTrapType := ToolTrap;
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Initialize}

FUNCTION TrapExists(theTrap: INTEGER): BOOLEAN;

{ Check to see if a given trap is implemented. This is only used by the
  Initialize routine in this program, so we put it in the Initialize segment. }

    VAR
        theTrapType:        TrapType;

    BEGIN
        theTrapType := GetTrapType(theTrap);
        IF (theTrapType = ToolTrap) THEN BEGIN
            theTrap := BAND(theTrap, $07FF);
            IF theTrap >= NumToolboxTraps THEN
                theTrap := _Unimplemented;
        END;

        TrapExists := NGetTrapAddress(_Unimplemented, ToolTrap) <> NGetTrapAddress(theTrap,
                      theTrapType);
    END;                                            { TrapExists }

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Initialize}

FUNCTION GetAUXVersion: INTEGER;

{The glue code for Gestalt will return appropriate values if the
system doesn't support the trap.  If an error is returned from Gestalt,
then either we weren't running on A/UX, or the Gestalt trap
was unable to fulfill the request so we revert to using low memory
globals instead.  This will work for A/UX version 1.x.  All other errors
are ignored (implies A/UX not present).

NOTE: We right shift AUXversion by 8 bits to get major version number
contained in the high byte, since we're not concerned with the minor
version.  Anything better than 2.0 is good enough for me.}

CONST
    kAUXbit                = 9;                    {bit set in LMGetHWCfgFlags for A/UX}
    kShiftHighByte        = 8;                    {shift 8 bits to the right}

VAR
    AUXversion:            LONGINT;
    err:                INTEGER;

BEGIN
    err:= Gestalt(gestaltAUXVersion, AUXVersion);

    IF (err <> noErr) THEN BEGIN
        IF BTst(LMGetHWCfgFlags, kAUXbit) THEN
            AUXversion:= kDefaultAUXVersion        {A/UX is running, default version}
        ELSE
            AUXVersion:= 0;                        {less than 1 means no version}
    END;
    GetAUXVersion:= BSR(AUXversion, kShiftHighByte);
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

{The following set of routines are used to access a couple of low memory
globals that are necessary when extending Standard File.  One example is
trying to get the current directory while in a file filter.  These routines
were used to bottleneck all the low memory usage.  If the system one day
supports them with a trap call, then we can easily update these routines.}

FUNCTION GetSFCurDir: LONGINT;

BEGIN
    GetSFCurDir:= LMGetCurDirStore;
END;

PROCEDURE SetSFCurDir(dirID: LONGINT);

BEGIN
    LMSetCurDirStore(dirID);
END;

FUNCTION GetSFVRefNum: INTEGER;

BEGIN
    GetSFVRefNum:= -LMGetSFSaveDisk;
END;

PROCEDURE SetSFVRefNum(vRefNum: INTEGER);

BEGIN
    LMSetSFSaveDisk(-vRefNum);
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION GetKFreeSpace(vRefNum: INTEGER): LONGINT;

{Return the amount of free space on the volume in KBytes. This builds a
  LONGINT based on an unsigned INTEGER, which looks like a negitive value to
  Pascal.  -1 is return as the size if there is an error.}

VAR
    pb:                 HParamBlockRec;
    convert:            TwoIntsMakesALong;
    err:                OSErr;

BEGIN
    WITH pb DO BEGIN                            {set up the block for PBHGetVInfo}
        ioNamePtr := NIL;                        {we don't care about the name}
        ioVRefNum := vRefNum;
        ioVolIndex := 0;                        {use ioVRefNum only}
    END;                                        {with}
    err := PBHGetVInfo(@pb, FALSE);

    IF (err = noErr) THEN BEGIN
        convert.ints[0] := 0;
        convert.ints[1] := pb.ioVFrBlk;
        GetKFreeSpace := (convert.long * pb.ioVAlBlkSiz) DIV 1024;
    END
    ELSE                                        {we couldn't get free space size!}
        GetKFreeSpace := - 1;
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION FailLowMemory(memRequest: LONGINT): BOOLEAN;

{Call PurgeSpace and see if the requested amount of memory exists in the
heap including a minimal amount of heap space.  Also, if my grow zone’s
reserve has been release, that’s considered a failure.  I don’t perform
any purging here.  The Memory Manager will do this if it needs the space.
This routine can be called with a memRequest = 0.  This checks if the heap
space is getting critical.}

VAR
    total, contig:        LONGINT;

BEGIN
    PurgeSpace(total, contig);
    FailLowMemory:= total < (memRequest + kMinSpace);
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION GetWTitleHeight(variant: INTEGER): INTEGER;

{Try and determine the window’s title bar height.  This isn’t easy,
 especially if the window is invisible.  We all know how the standard Apple
 System WDEF works, at least at this date we do.  I assume that method as
 shown below.  I could do what MacApp does with the Function CallWDefProc.
 If the user has installed a replacement for the System WDEF, then it’s
 their problem to deal with.  My method will work as long as Apple doesn’t
 change how the WDEF in System 6.0 calculates the title bar height.  This
 will allow my application to work on international Macs that have a larger
 system font than Chicago.  I check the window’s variant code for one that
 includes a title bar.  I will have to change this routine to adjust for
 the modal-moveable window type, which hasn’t been defined yet.

 In this routine, I violate my rule about not using the GetPort, SetPort,
 SetPort sequence mentioned at the start of the file. Mostly, I do this
 because it’s not all that apparent that a routine called GetWTitleHeight
 will change the port, so I make sure that it doesn’t.}

VAR
    info:                FontInfo;
    curGraf,
    wMgrPort:        GrafPtr;
    wTitleHeight:    INTEGER;

BEGIN
    IF variant IN [documentProc, noGrowDocProc,
                        zoomDocProc, zoomNoGrow, rDocProc] THEN BEGIN
        GetPort(curGraf);
        GetWMgrPort(wMgrPort);                        {I need to know the font...}
        SetPort(wMgrPort);                            {info in the System’s port}
        GetFontInfo(info);
        SetPort(curGraf);                            {restore current port}
        WITH info DO
            wTitleHeight:= ascent + descent + leading + 2;
        IF wTitleHeight < 19 THEN
            wTitleHeight:= 19;                        {the title is always at least 19}
        GetWTitleHeight:= wTitleHeight;
    END ELSE
        GetWTitleHeight:= 0;                        {other window types have no title}
END; {GetWTitleHeight}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE CenterWindowRect(variant: INTEGER; VAR theRect: Rect);

{Given a window’s portRect, this routine will center the rectangle on the
 main device within the desktop region.  This excludes the menu bar area.
 It follows the Apple Human Interface Guidelines for where to place a
 window centered on the screen. That is, 1/3th of the desktop shows above
 the window and 2/3ths below it.  It returns a new rectangle set to the
 centered position.  The top and left of this rectangle can be used with
 MoveWindow.  This routine only considers the main device.  CenterWindowRect
 could take a GDevice as a parameter to center the VAR rect with.  This
 would also allow Alerts or dialogs that are closely associated with a
 document window to be centered relative to the monitor that contains that
 document.  This is also one of the Human Interface Guidelines.  MacApp 2.0
 has a utility CalcScreenRect that you can borrow from to include this.

 WARNING: This routine may move or purge memory.}

VAR
    rectSize:         Point;
    wTitleHeight:    INTEGER;

BEGIN
    wTitleHeight:= GetWTitleHeight(variant);        {get title height}
    WITH theRect DO BEGIN                            {get size of rect}
        SetPt(rectSize, right, bottom + wTitleHeight);    {include it in size}
        SubPt(topLeft, rectSize);
    END;
    WITH qd.screenBits.bounds DO BEGIN                    {1/3th below menubar}
        theRect.top:= ((bottom - top - LMGetMBarHeight - rectSize.v) DIV 3)
                          + LMGetMBarHeight;
        theRect.left:= ((right - left) - rectSize.h) DIV 2;    {centered horz}
    END;
    WITH theRect DO BEGIN                            {return adjusted rect}
        SetPt(botRight, left, top);
        AddPt(rectSize, botRight);
        top:= top + wTitleHeight;                    {remove title height from rect}
    END;
END; {CenterWindowRect}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION CenteredAlert(alertID: INTEGER): INTEGER;

{Given an Alert ID, this routine will center the alert’s rectangle before
 showing it on the main screen.  This follows the Apple Human Interface
 Guidelines for where to place a centered window on the screen.  If the
 Alert is closely associated with another window, considerations should be
 given to what the window is located.  If this other window is on a screen
 other then the main monitor, then it would be best to center the Alert on
 that other monitor.}

VAR
    alertHandle:    AlertTHndl;
    alertRect:        Rect;
    itemHit:            INTEGER;

BEGIN
    alertHandle:= AlertTHndl(Get1Resource('ALRT', alertID));
    IF alertHandle <> NIL THEN BEGIN
        HNoPurge(Handle(alertHandle));
        alertRect:= alertHandle^^.boundsRect;
        CenterWindowRect(dBoxProc, alertRect);
        alertHandle^^.boundsRect:= alertRect;
        HPurge(Handle(alertHandle));
    END;
    CenteredAlert:= Alert(alertID, NIL);
END; {CenteredAlert}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE EmergencyExit(message: INTEGER);

{Display an alert that tells the user an error occurred, then exit the
program.  This routine is used as an ultimate bail-out for serious errors
that prohibit the continuation of the application.  Errors that do not
require the termination of the application are handled with AlertUser.
Error checking and reporting has a place even in the simplest application.

BUG NOTE: GetIndString will return a bogus String if the index is not
positive.}

VAR
    msg1:                Str255;
    theItem:            INTEGER;

BEGIN
    SetCursor(qd.arrow);
    IF message > 0 THEN
        GetIndString(msg1, rErrStrings, message)
    ELSE
        msg1:= '';                                {in case there is no message}
    ParamText(msg1, '', '', '');
    theItem:= CenteredAlert(rExitAlert);
    ExitToShell;                                {we're out of here}
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE SetRadioButton(dlgPtr: DialogPtr; itemNo: INTEGER; state: INTEGER);

{Handy routine for setting the value of a radio button. Given a dialog
  pointer, and item number, and a state, this routine will take care of the
  rest.}

VAR
    iKind:                INTEGER;
    iHandle:            Handle;
    iRect:                Rect;

BEGIN
    GetDialogItem(dlgPtr, itemNo, iKind, iHandle, iRect);
    SetControlValue(ControlHandle(iHandle), state);
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE PositionTwoRects(outerRect: Rect; VAR innerRect: Rect; horzRatio, vertRatio: Fixed);

{Given two rectangles, this routine positions the second within the first one
  so that the it maintains the spacing specified by the horzRatio and vertRatio
  parameters. In other words, to center an inner rectangle hoizontally, but
  have its center be 1/3 from the top of the outer rectangle, call this
  routine with horzRatio = FixRatio (1, 2), vertRatio = FixRatio (1, 3).  We use
  Fixed rather than floating point because Fixed has plenty of accuracy and is very fast. }

VAR
    outerRectHeight:    INTEGER;
    outerRectWidth:     INTEGER;
    innerRectHeight:    INTEGER;
    innerRectWidth:     INTEGER;
    yLocation:            INTEGER;
    xLocation:            INTEGER;

BEGIN
    outerRectHeight := outerRect.bottom - outerRect.top;
    outerRectWidth := outerRect.right - outerRect.left;

    innerRectHeight := innerRect.bottom - innerRect.top;
    innerRectWidth := innerRect.right - innerRect.left;

    yLocation := Fix2Long (FixMul (Long2Fix (outerRectHeight - innerRectHeight), vertRatio))
        + outerRect.top;
    xLocation := Fix2Long (FixMul (Long2Fix (outerRectWidth - innerRectWidth), horzRatio))
        + outerRect.left;
    WITH innerRect DO BEGIN
        top := yLocation;
        left := xLocation;
        bottom := yLocation + innerRectHeight;
        right := xLocation + innerRectWidth;
    END;
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE OutlineButton(button: UNIV ControlHandle);

{Given any control handle, this will draw an outline around it.  This is
 used for the default button of a window.  The extra nice feature here is
 that I’ll erase the outline for buttons that are inactive.  Seems like
 there should be a Toolbox call for getting a control’s hilite state.
 Since there isn’t, I have to look into the control record myself.    This
 should be called for update and activate events.

 The method for determining the oval diameters for the roundrect is a
 little different than that recommended by Inside Mac.    IM I-407 suggests
 that you use a hardcoded (16,16) for the diameters. However, this only
 looks good for small roundrects. For larger ones, the outline doesn’t
 follow the inner roundrect because the CDEF for simply buttons doesn’t
 use (16,16). Instead, it uses half the height of the button as the
 diameter. By using this formula, too, our outlines look better.

 WARNING: This will set the current port to the control’s window.}

VAR
    theRect:            Rect;
    curPen:             PenState;
    buttonOval:         INTEGER;

BEGIN
    IF button <> NIL THEN BEGIN
        SetPort(button^^.contrlOwner);
        GetPenState(curPen);
        PenNormal;
        theRect := button^^.contrlRect;
        InsetRect(theRect, kButtonFrameInset, kButtonFrameInset);
        buttonOval := (theRect.bottom - theRect.top) DIV 2;
        IF (button^^.contrlHilite = kCntlActivate) THEN
            PenPat(qd.black)
        ELSE
            PenPat(qd.gray);
        PenSize(kButtonFrameSize, kButtonFrameSize);
        FrameRoundRect(theRect, buttonOval, buttonOval);
        SetPenState(curPen);
    END;
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE DoAbout;

VAR
    apNameHndl:         StringHandle;
    curVersion:         VersRecHndl;
    apName:             Str255;
    verNum:             Str255;
    itemHit:            INTEGER;

BEGIN
    curVersion := VersRecHndl(Get1Resource('vers', 1));
    IF curVersion <> NIL THEN BEGIN
        verNum := StringPtr(ORD(@curVersion^^.shortVersion) + ORD(curVersion^^.
                            shortVersion[0]) + 1)^ { get long version string }
    END ELSE
        verNum := '????';                        {at least initialize it}

    ParamText(gAppName, verNum, '', '');
    itemHit := CenteredAlert(rAboutAlert);
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE AlertUser(error: INTEGER; messageID: INTEGER);

{Display an alert to inform the user of an error.  MessageID acts as an
index into a Str# resource of error messages.    This will attempt to
replace the error number with a String if the sound is a Sound Manager
error.

BUG NOTE: GetIndString will return a bogus String if the index is not
positive.}

VAR
    msg1, msg2:         Str255;
    theItem:            INTEGER;

BEGIN
    IF messageID > 0 THEN
        GetIndString(msg1, rErrStrings, messageID)
    ELSE
        msg1:= '';                                {in case there is no message}
    IF error <> noErr THEN
        NumToString(error, msg2)
    ELSE
        msg2:= '';
    ParamText(msg1, msg2, '', '');
    theItem:= CenteredAlert(rUserAlert);
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION MyHGetVol(volName: StringPtr; VAR vRefNum: INTEGER; VAR dirID: LONGINT): OSErr;

{BUG NOTE: The high level call, HGetVol, should do this dirty work for us.
Unfortunately it is returning the ioVRefNum which Inside Mac warns may be
a working directory.  The field ioWDVRefNum will always be the real vRefNum.}

VAR
    myWDBRec:            WDPBRec;

BEGIN
    myWDBRec.ioCompletion:= NIL;
    myWDBRec.ioNamePtr:= NIL;
    MyHGetVol:= PBHGetVol(@myWDBRec, kFSAsynch);
    vRefNum:= myWDBRec.ioWDVRefNum;                {the real vRefNum}
    dirID:= myWDBRec.ioWDDirID;
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION GetTempFileName: Str63;

{Build a name for a temporary file by adding a suffix (contained in a
resource) to the application's name.}

VAR
    tempStr:            Str255;

BEGIN
    GetIndString(tempStr, rStrMisc, sTempFName);{build file name}
    GetTempFileName:= CONCAT(gAppName, tempStr);
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE Terminate;

{Clean up the application and exit.  Delete the temporary file.}

VAR
    err:                OSErr;

BEGIN
    err:= HDelete(gAppVRefNum, gAppParID, GetTempFileName);
    ExitToShell;                                {exit if no cancellation}
END;                                            {Terminate}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE DrawItemFrame(dlgPtr: DialogPtr; itemNo: INTEGER);

{Draws a frame around the dialog item.}

VAR
    iRect:                Rect;
    ps:                 PenState;
    iHandle:            Handle;
    iKind:                INTEGER;

BEGIN
    GetDialogItem(dlgPtr, itemNo, iKind, iHandle, iRect);
    GetPenState(ps);
    PenSize(1, 1);
    FrameRect(iRect);
    SetPenState(ps);
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION PathNameFromDirID(DirID: LONGINT; vRefnum: INTEGER;
                            VAR fullPathName: Str255): OSErr;

{Given a DirID and real vRefnum, this routine will create and return the
full pathname that it corresponds to. It does this by calling
PBGetCatInfo for the given directory, and finding out its name and the
DirID of its parent. It the performs the same operation on the parent,
sticking its name onto the beginning of the first directory. This whole
process is carried out until we have processed the root directory
(identified with a DirID of fsRtDirID.

SPECIAL NOTE: This routine is once check for A/UX and would add the "/"
delimiter.  A/UX 2.0 supports the ":" just like HFS, and 2.0 is the
officially supported version.  So, we no longer need to special case the
code.  An important comment that was originally in this routine should be
considered again.

HOWEVER, BECAUSE OF THIS DEPENDENCY ON THE IDIOSYNCRASIES OF FILE
SYSTEMS, GENERATING FULL PATHNAMES FOR OTHER THAN DISPLAY PURPOSES IS
DISCOURAGED; IT'S CHANGED IN THE PAST WHEN A/UX WAS IMPLEMENTED, AND IT
MAY CHANGE AGAIN IN THE FUTURE IF SUPPORT FOR OTHER FILE SYSTEMS SUCH AS
PRODOS, MS-DOS, OR OS/2 ARE ADDED.

The full path name cannot exceed 255 chars.  If this happens, an error
bdNamErr is returned.  So be careful out there!}

VAR
    dirName:            Str255;
    fullName:            Str255;
    myCInfo:            CInfoPBRec;
    err:                OSErr;

BEGIN
    err:= noErr;
    fullName:= '';
    dirName:= '';
    myCInfo.ioNamePtr:= @dirName;
    myCInfo.ioDrParID:= DirID;

    REPEAT
        WITH myCInfo DO BEGIN
            ioVRefNum:= vRefnum;
            ioFDirIndex:= -1;                    {-1 means use ioDrDirID}
            ioDrDirID:= ioDrParID;
        END;
        err:= PBGetCatInfo(@myCInfo, NOT kFSAsynch);
        IF err = noErr THEN BEGIN
            dirName:= CONCAT(dirName, ':');
            IF LENGTH(dirName) + LENGTH(fullName) > 255 THEN
                err:= bdNamErr                    {too big to eat!}
            ELSE
                fullName:= CONCAT(dirName, fullName);
        END;
    UNTIL (myCInfo.ioDrDirID = fsRtDirID) | (err <> noErr);

    fullPathName:= fullName;
    PathNameFromDirID:= err;
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION PathNameFromWD(wdRefNum: LONGINT; VAR pathName: Str255): OSErr;

{Given an HFS working directory, this routine returns the full pathname
that it corresponds to. It does this by calling PBGetWDInfo to get the
real VRefNum and DirID of the working directory. It then calls
PathNameFromDirID, and returns its result.

BUG NOTE:  The special case portion of this routine that worked around an
U/UX 1.1 bug has been removed.  This application only runs with A/UX 2.0.
The following comment has been left here for historical purposes only.

PBGetWDInfo has a bug under A/UX 1.1.  If vRefNum is a real vRefNum and
not a wdRefNum, then it returns garbage.  Since A/UX has only one volume
(in the Macintosh sense) and only one root directory, this can occur only
when a file has been selected in the root directory (/). So we look for
this and hardcode the DirID and vRefNum.

SPECIAL NOTE: Make sure you have read and understood Tech Note 238.}

VAR
    dirID:                LONGINT;
    procID:                LONGINT;
    vRefNum:            INTEGER;
    err:                OSErr;

BEGIN
    err:= GetWDInfo(wdRefNum, vRefNum, dirID, procID);
    IF err = noErr THEN
        err:= PathNameFromDirID(dirID, vRefNum, pathName);
    PathNameFromWD:= err;
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE ShowSelection(name, msg: Str255);

{This routine shows an Alert of the selected item (name) and an optional
message (msg) that is used as the file's type.}

VAR
    theItem:            INTEGER;

BEGIN
    ParamText(name, msg, '', '');
    theItem:= CenteredAlert(rShowSelectionAlert);
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE ShowCancelled;

{This simply calls up the alert showing the user selected the cancel
button of Standard File.}

VAR
    tStr:                Str255;
    theItem:            INTEGER;

BEGIN
    GetIndString(tStr, rStrMisc, sSelectedCancel);
    ParamText(tStr, '', '', '');
    theItem:= CenteredAlert(rShowSelectionAlert);
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION ShowFoundFile(fName: Str63; parID: LONGINT; vRefNum: INTEGER): OSErr;

{This alert shows the file name and the modification date to prove that the
file can be located by the given parameters.}

VAR
    msg1:                Str255;
    fHPBRec:            HParamBlockRec;
    theItem:            INTEGER;
    err:                OSErr;

BEGIN
    WITH fHPBRec DO BEGIN
        ioCompletion:= NIL;
        ioNamePtr:= @fName;
        ioFDirIndex:= 0;
        ioDirID:= parID;
        ioVRefNum:= vRefNum;
    END;
    err:= PBHGetFInfo(@fHPBRec, NOT kFSAsynch);
    IF err = noErr THEN BEGIN
        IUDateString(fHPBRec.ioFlMdDat, longDate, msg1);
        ParamText(fName, msg1, '', '');
        theItem:= CenteredAlert(rFInfoAlert);
    END;
    ShowFoundFile:= err;
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE UIPFileList(theWindow: WindowPtr; item: INTEGER);

{Dialog user item procedure to draw the multi-file list.  The multi-file
list item is requrest to be drawn by the Dialog Manager.  A handle to the
list must be stored in the global variable "gListHandle" because the
Dialog Manager isn’t kind enough to let us pass a little information to
our user-item procedures in the good computer science way, dagnabbit. The
"theWindow" parameter is actually a pointer to our custom SFGetFile
dialog. The "item" parameter specifies the item number to be drawn.
Since only one item in our dialog uses UIPFileList, we don’t really have
to check to see if the item number is in fact the multi-file list, but we
might as well so that people think we’re some cool programmers who take
care to check everything.

Check to be absolutely sure we’re talking about the file list item before
we do anything to it. This alert shows the file name and the modification
date to prove that the file can be located by the given parameters.}

BEGIN
    IF item = kFileListItem THEN BEGIN
        LUpdate(theWindow^.visRgn, gListHandle);{Draw visible part of list}
        DrawItemFrame(theWindow, kFileListItem); {...and frame it}
    END;
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE CreateFGetList(dlgPtr: DialogPtr; VAR listRect: Rect;
                            VAR listH: ListHandle);

{Build a three column list.  Set the column's width to cover the entire
list's visible rectangle.  This is done by adjusting the cellSize.  This
keeps the other two columns hidden from the user.  I also do not allow a
horizontal scrolling to prevent the user from viewing the hidden data.
It's a sick hack.  I really don't like this idea, nor would I encourage
anyone else to do this.  Sorta, "Do as I say, not as I do."  I also
adjust the list rectangle for best scrolling.  This is something that few
people do. They must be hard coding a size.  The adjusted rectangle is
returned so the caller will know the new size.}

VAR
    lBounds:             Rect;                    {Rectangle of list data}
    cellSize:            Point;                    {size of a cell}
    info:                FontInfo;
    newHeight:            INTEGER;                {adjustement to list rect size}

BEGIN
    InsetRect(listRect, kListFrameInset, kListFrameInset);
    listRect.right:= listRect.right - kScrollbarAdjust;
    GetFontInfo(info);
    cellSize.h:= listRect.right - listRect.left;
    cellSize.v:= info.ascent + info.descent + info.leading;
    newHeight:= cellSize.v;
    WHILE (newHeight + cellSize.v) < (listRect.bottom - listRect.top) DO
        newHeight:= newHeight + cellSize.v;
    listRect.bottom:= listRect.top + newHeight;
    SetRect(lBounds, 0, 0, 3, 0);                {three columns in list}
    listH:= LNew(listRect,                         {Location of list in window}
                    lBounds,                    {Initial size of array}
                    cellSize,                     {Cell size (0 = default)}
                    0,                            {Resource ID of LDEF}
                    dlgPtr,                        {Pointer to our Std File dialog}
                    TRUE,                         {needs to be drawn?}
                    FALSE,                        {grow box?}
                    FALSE,                        {horizontal scrolling?}
                    TRUE);                        {vertical scrolling?}
    InsetRect(listRect, -kListFrameInset, -kListFrameInset);
    listRect.right:= listRect.right + kScrollbarAdjust;
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE DeselectAllCells(listH: ListHandle);

VAR
    listCell:            Cell;
    done:                BOOLEAN;

BEGIN
    listCell:= Point(0);
    done:= FALSE;
    REPEAT
        IF LGetSelect(TRUE, listCell, listH) THEN
            LSetSelect(FALSE, listCell, listH)
        ELSE
            done:= TRUE;
    UNTIL done;
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE AddFItem(name: Str255; curDir: LONGINT; vRefNum: INTEGER;
                        listH: ListHandle);

{This takes the given information and adds it to the list.  First thing to
do is check for the file to have already been added to the list.  If it
has, then we only have to show the user that the item is already there.
Before we eixt, we select just the current cell and the scroll it into view.}

VAR
    listCell:            Cell;                    {File list cell}
    itemDirID:            LONGINT;
    itemVRefNum:        INTEGER;
    dataLength:            INTEGER;
    done:                BOOLEAN;

BEGIN
    listCell:= Point(0);
    done:= FALSE;
    REPEAT
        IF LSearch(@name[1], LENGTH(name), NIL, listCell, listH) THEN BEGIN
            listCell.h:= 1;
            dataLength:= SizeOf(itemDirID);
            LGetCell(@itemDirID, dataLength, listCell, listH);
            listCell.h:= 2;
            dataLength:= SizeOf(itemVRefNum);
            LGetCell(@itemVRefNum, dataLength, listCell, listH);
            IF (curDir = itemDirID) & (vRefNum = itemVRefNum) THEN BEGIN
                done:= TRUE;                    {found the existing item}
            END;
        END
        ELSE BEGIN
            listCell.h:= 0;
            listCell.v:= LAddRow(1, listH^^.dataBounds.bottom, listH);
            LSetCell(@gReply.fName[1], LENGTH(name), listCell, listH);
            listCell.h:= 1;
            LSetCell(@curDir, SizeOf(curDir), listCell, listH);
            listCell.h:= 2;
            LSetCell(@vRefNum, SizeOf(vRefNum), listCell, listH);
            LSetSelect(TRUE, listCell, listH);
            done:= TRUE;
        END;
    UNTIL done;
    DeselectAllCells(listH);
    listCell.h:= 0;                                {first column, current row}
    LSetSelect(TRUE, listCell, listH);
    LAutoScroll(listH);
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE GetFItems(listH: ListHandle);

{We need to copy all of the files from the global list and store these into
a global array of file descriptions.}

VAR
    theCell:            Point;
    numOfFiles:            INTEGER;
    dataLength:            INTEGER;
    index:                INTEGER;

BEGIN
    numOfFiles:= listH^^.dataBounds.bottom;
    gMultiFiles:= FileSpecHdl(NewHandle(SizeOf(FileDesc) * numOfFiles));
    MoveHHI(Handle(gMultiFiles));        {helps to reduce fragmentation}
    HLock(Handle(gMultiFiles));
    FOR index:= 1 TO numOfFiles DO BEGIN
        dataLength:= SizeOf(gMultiFiles^^[index].vRefNum);
        SetPt(theCell, 2, index - 1);
        LGetCell(@gMultiFiles^^[index].vRefNum, dataLength, theCell, listH);
        dataLength:= SizeOf(gMultiFiles^^[index].parID);
        SetPt(theCell, 1, index - 1);
        LGetCell(@gMultiFiles^^[index].parID, dataLength, theCell, listH);
        dataLength:= SizeOf(gMultiFiles^^[index].name);
        SetPt(theCell, 0, index - 1);
        LGetCell(@gMultiFiles^^[index].name[1], dataLength, theCell, listH);
        gMultiFiles^^[index].name[0]:= CHR(dataLength);
    END;
    HUnlock(Handle(gMultiFiles));
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE RemoveFItems(listH: ListHandle);

{Delete all selected files from the multi-file list.  Don’t want all that
flickerin’, so turn off drawing.  Keep deleting selected rows until no
selected rows are left.  Finally, turn on drawing and erase the list.
It’ll get drawn on the next update event.  This takes the given
information and adds it to the list.}

VAR
    listRect:            Rect;                    {Rectangle for list}
    listCell:            Cell;                    {File list cell}

BEGIN
    LSetDrawingMode(FALSE, listH);
    listCell:= Point(0);
    WHILE LGetSelect(TRUE, listCell, listH) DO BEGIN
        LDelRow(1, listCell.v, listH);
        listCell:= Point(0);
    END;
    listCell:= Point(0);
    LSetSelect(TRUE, listCell, listH);
    LAutoScroll(listH);
    listRect:= listH^^.rView;
    LSetDrawingMode(TRUE, listH);
    InvalRect(listRect);
    EraseRect(listRect);
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE CreateFPutList(dlgPtr: DialogPtr; VAR listRect: Rect;
                            VAR listH: ListHandle; VAR cellStr: Str255);

{This creates a list used to hold a number of file types.  The selected
item is used to determine which format the file should be saved as.  The
list rectangle is adjusted to the best scrolling size, and the adjusted
size is returned to the caller.  It's also important to select the first
item in the list as a default file format and that only one item can be
selected.}

VAR
    entry:                Str255;
    lBounds:            Rect;
    newSize:            Point;
    theCell:            Point;
    newRow:             INTEGER;
    dataLen:            INTEGER;

BEGIN
    InsetRect(listRect, kListFrameInset, kListFrameInset);
    listRect.right:= listRect.right - kScrollbarAdjust;
    SetRect(lBounds, 0, 0, 1, 0);                 {one dimentional list}
    listH:= LNew(listRect,                        {position in window}
                    lBounds,                     {initial size of array}
                    Point(0),                    {cell size (0 = default)}
                    0,                            {resource ID of LDEF}
                    dlgPtr,                        {window pointer}
                    TRUE,                        {drawit}
                    FALSE,                        {has grow}
                    FALSE,                        {scrollHoriz}
                    TRUE);                        {scrollVert}
    newSize:= listH^^.cellSize;                    {get the size of one cell}
    WHILE (newSize.v + listH^^.cellSize.v) < (listRect.bottom - listRect.top) DO
        newSize.v:= newSize.v + listH^^.cellSize.v;
    LSize(newSize.h, newSize.v, listH);            {adjust for best scrolling}
    listH^^.selFlags:= lOnlyOne;                {single selections only}

    theCell:= Point(0);
    REPEAT
        GetIndString(entry, rStrList, theCell.v + 1);
        IF (entry <> '') THEN BEGIN
            newRow:= LAddRow(1, listH^^.databounds.bottom, listH);
            LSetCell(@entry[1], LENGTH(entry), theCell, listH);
        END;
        theCell.v:= theCell.v + 1;
    UNTIL (entry = '');
    theCell:= Point(0);
    LSetSelect(TRUE, theCell, listH);
    datalen:= SizeOf(cellStr);
    LGetCell(@cellStr[1], datalen, theCell, listH);
    cellStr[0]:= CHR(dataLen);

    listRect.bottom:= listRect.top + newSize.v;
    InsetRect(listRect, -kListFrameInset, -kListFrameInset);
    listRect.right:= listRect.right + kScrollbarAdjust;
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE DisposeFPutList(listH: ListHandle; VAR cellStr: Str255);

{Just get rid of the list, but before we do that get the currently selected
cell's data which is the user's choice of file format.}

VAR
    theCell:            Point;
    dataLen:            INTEGER;

BEGIN
    SetPt(theCell, 0, 0);
    IF LGetSelect(TRUE, theCell, listH) THEN BEGIN
        datalen:= SizeOf(cellStr);
        LGetCell(@cellStr[1], datalen, theCell, listH);
        cellStr[0]:= CHR(dataLen);                {length byte}
    END;
    LDispose(listH);
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{Simple SFGetFile example}
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}

{Simplest form of SFGetFile.  This routine puts up a GetFile dialog with a
request to show all files.  When this is done, a check is made to see
which of the Save or Cancel buttons were pressed.  If the Save button was
pressed, ShowSelection is called to display which file was selected.  If
the Cancel button was pressed, a dialog is shown saying so.

A full path name is shown of the selected file.  This is done as an
example.  Generally full path names should be avoided.  If you wanted to
remember the location of a file, such as the next time the application is
launch, you should remember the volume name, directory ID, and file name.
As an example of how to do this, refer to the routine DoRememberFile.}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE ShowPath;

VAR
    pathStr:            Str255;
    typeList:            SFTypeList;
    reply:                SFReply;
    err:                OSErr;

BEGIN
    SFGetFile(Point(kSFTopLeft),                {location}
              '',                                {prompt String}
              NIL,                                {file filter}
              kShowAllFiles,                    {numtypes}
              typeList,                         {array to types to show}
              NIL,                                {dialog hook}
              reply);                            {record for returned values}
    IF reply.good THEN BEGIN
        err:= PathNameFromWD(reply.vRefnum, pathStr);
        IF err = noErr THEN BEGIN
            IF LENGTH(pathStr) + LENGTH(reply.fName) > 255 THEN
                AlertUser(bdNamErr, sFileSystem)
            ELSE
                ShowSelection(CONCAT(pathStr, reply.fName), '');
        END
        ELSE
            AlertUser(err, sFileSystem);
    END
    ELSE
        ShowCancelled;
END;


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{SFPGetFile with Dialog Hook and Simple File Filter}
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}

{Depending on the value of the global variable "gNormal", this
demonstrations shows either TEXT files or APPL files.  The value of
"gNormal" is determined by the states of two radio buttons that are added
to the dialog box.  Our dialog hook routine is used to initialize the radio
buttons and handle hits on them.  When there is a hit on a radio button,
"gNormal" is set to either TRUE or FALSE, and a special command is sent
back to Standard File telling it to regenerate the list of file names it
is displaying.  This sample consists of 3 parts:

DoNormalPGet
------------
This routine initializes a variable for our file filter, and then calls
SFPGetFile with pointers to two other routines and a resource number for
a special dialog box with extra items in it.

SimpleFFilter
----------------
Specified in our SFPGetFile call to be called to specify whether or not a
file should be displayed.  If the global variable 'gNormal' is TRUE, then
all text are displayed.  Otherwise, Applications will be displayed.

MySFGetDlgHook
----------------
A routine that is called to handle hits on the non-standard items in our
dialog box.  The dialog hook is also used to perform some special
initialization on the items in the dialog box.  Standard file does this by
calling this routine with a bogus 'item' number of -1.  When we get this
number, we initialize our radio buttons, and change the text in the Open
button.

The radio buttons are used to determine what files will appear in the
files list.  It does this by appropriately setting the 'gNormal' variable
for SimpleFFilter, and then telling Standard File that the file list
needs to be regenerated by passing back 101 as the function result.}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION MySFGetDlgHook(MySFitem: INTEGER; dlgPtr: DialogPtr): INTEGER;

BEGIN
    MySFGetDlgHook:= MySFitem;
    CASE MySFitem OF

        kFirstTime: BEGIN
            SetRadioButton(dlgPtr, kAppButton, kCntlOff);
            SetRadioButton(dlgPtr, kTextButton, kCntlOn);
        END;

        kTextButton: BEGIN
            IF NOT gNormal THEN BEGIN
                SetRadioButton(dlgPtr, kAppButton, kCntlOff);
                SetRadioButton(dlgPtr, kTextButton, kCntlOn);
                gNormal:= TRUE;
                MySFGetDlgHook:= kReDrawList;
            END;
        END;

        kAppButton: BEGIN
            IF gNormal THEN BEGIN
                SetRadioButton(dlgPtr, kTextButton, kCntlOff);
                SetRadioButton(dlgPtr, kAppButton, kCntlOn);
                gNormal:= FALSE;
                MySFGetDlgHook:= kReDrawList;
            END;
        END;

    END;
END;


FUNCTION SimpleFFilter(p: ParmBlkPtr): BOOLEAN;

BEGIN
    SimpleFFilter:= NOT kShowIt;                {Don't show it -- default}
    WITH p^.ioFlFndrInfo DO
        IF gNormal THEN BEGIN
            IF fdType = 'TEXT' THEN
                SimpleFFilter:= kShowIt;
        END
        ELSE
            IF fdType = 'APPL' THEN
                SimpleFFilter:= kShowIt;
END;


PROCEDURE DoNormalPGet;

VAR
    typeList:            SFTypeList;
    reply:                SFReply;
    err:                OSErr;
    ffUPP:                FileFilterUPP;
    dhUPP:                DlgHookUPP;

BEGIN
    gNormal:= TRUE;

    ffUPP := NewFileFilterProc(@SimpleFFilter);
    dhUPP := NewDlgHookProc(@MySFGetDlgHook);
    SFPGetFile(Point(kSFTopLeft),                {location}
                '',                                {vestigial String}
                ffUPP,                            {file filter}
                kShowAllFiles,                    {numtypes}
                typeList,                        {array to types to show}
                dhUPP,                            {dialog hook}
                reply,                            {record for returned values}
                rSFPGetFileDLOG,                 {ID of Custom Dialog}
                NIL);                            {ModalDialog filterProc}
    DisposeRoutineDescriptor(dhUPP);
    DisposeRoutineDescriptor(ffUPP);
    IF reply.good THEN
        ShowSelection(reply.fName, '')
    ELSE
        ShowCancelled;
END;


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{SFGetFile with a complex File Filter}
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}

{Sample of a less trivial file filter.  This routine is responsible for
displaying only files that have 'ALRT' resources.  It shows how to
correctly look inside a file for qualifying information, and demonstrates
how to get around a particular quirk when attempting multiple access to
the resource fork.

DoFFilter
---------
Calls SFGetFile and specifies the File Filter.

ComplexFFilter
--------------
This routine used to do skanky things like looking at a low memory global
to determine of a new resource file map was opened or not.  Even more
nastiness was the it created a working directory.  Well, this was all too
sick and a completely different approach is now taken.  Opening a
resource file as read-only will always create a new map.  This should
generally be avoided, but here I'm opening it and then immediately
closing it without allowing anything else to access the file.

Opening resource forks can be tricky if it's already open.  It would be
very bad to use a resource fork that is already open by another
application.  The problem being that the Resource Manager doesn't deal
with multiple users.  Read Tech notes #116 and #185.  There's also
another problem.  If a resource fork is opened by two applications and
one closes the file then the entire resource fork may closed out from
underneath the other application.  I do, however, want to show the user
files that contain ALRT resources even if the file is currently open.  I
use HOpenResFile with read only permission, which will give me a unique
resource reference.  I look for an ALRT resource and then immediately
close the file.  Do not use a resource file opened with read only
permission because another application could come along and start writing
to it.  Another reason to use HOpenResFile  is to avoid a necessary
working directory.  I can use the DirID kept updated by Standard File.
Performing this search on each file is time consuming so I show a
spinning cursor to show the user I'm working.    Opening a resource fork
may load resources mark preload.  To avoid this, I call SetResLoad to
FALSE.  Read Tech Note #203 for other reasons not to play with resources.}


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION ComplexFFilter(p: ParmBlkPtr): BOOLEAN;

{SPECIAL NOTE: The ParamBlockRec is a relocatable object in the heap.  The
file name is one of the fields in this handle.  Because of this we need
to copy the fields that we use to a local variable to avoid deferenced
handle problems.}

VAR
    fileName:            Str255;
    oldTicks:            LONGINT;
    resRef, curRes:     INTEGER;
    vRefNum:            INTEGER;

BEGIN
    oldTicks:= TickCount;
    ComplexFFilter:= NOT kShowIt;                {don’t show anything until I say so}
    fileName:= p^.ioNamePtr^;                    {must save name}
    vRefNum:= p^.ioVRefNum;                        {must save volume (or WD) reference}
    curRes:= CurResFile;
    SetResLoad(FALSE);
    resRef:= HOpenResFile(vRefNum, GetSFCurDir, fileName, fsRdPerm);
    IF (resRef <> - 1) THEN BEGIN
        UseResFile(resRef);
        IF Count1Resources('ALRT') > 0 THEN
            ComplexFFilter:= kShowIt;            {hey, we found an Alert in here}
        CloseResFile(resRef);
    END;                                        {restore everything}
    SetResLoad(TRUE);
    UseResFile(curRes);
    RotateCursor(TickCount - oldTicks);
END;


PROCEDURE DoFFilter;

VAR
    typeList:            SFTypeList;
    reply:                SFReply;

BEGIN
    SpinCursor(0);                                {get the spinning cursor ready}
    SFGetFile(Point(kSFTopLeft),                {location}
              '',                                {vestigial String}
              @ComplexFFilter,                    {file filter}
              kShowAllFiles,                    {numtypes}
              typeList,                         {array to types to show}
              NIL,                                {dialog hook}
              reply);                            {record for returned values}
    IF reply.good THEN
        ShowSelection(reply.fName, '')
    ELSE
        ShowCancelled;
END;


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{DoGetDirectory with a Dialog Hook and File Filter}
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}

{This demonstrates how to modify SFGetFile to allow you to select a
directory.  This mimics the "GetFileName -d" function of MPW.  As a matter
of fact, the DLOG and DITL used in this sample were taken directly out of
MPW.  There are 2 major additions in the dialog used in this sample:

1. a Simple button that lets one select the directory that is currently
   highlighted in the list of directories,
2. Simple button at the top of the dialog that lets the user select the
   directory that we are currently *IN*.

DoGetDirectory
--------------
Sets up the pointers to the Dialog Hook and File Filter.  Once the user
has selected a folder, we look at the global gMyCurDir which was set
within the Dialog Hook.  We take this DirID and call PBGetCatInfo to find
the name of this folder.  This is so we can display the name to the user.

MyGetDirDlgHook
----------------
No new techniques are really used in this sample.  Hits on the two simple
buttons are handled by a dialog hook called GetDirDlgHook.  Depending on
which button is hit, we set the global variable gMyCurDir to either
gReply.fType (for the currently highlighted directory) or what Standard
File has set as the current directory.  We then simulate a hit on the Open
button so that Standard File will return to our application and the
FSReply.good will be TRUE.

While an item is selected, the gReply.fType will be set to a value.
gReply.fType is set to 0 when nothing is selected.  We test for this
during idle time (item = 100) and activate the Directory button
appropriately.  We also use the "Item = -1" feature to set up a prompt
String.

FolderFFilter
-------------
Normally, folders are ALWAYS shown, and aren't even passed to this file
filter for judgement.  Under such circumstances, it is only necessary to
blindly return TRUE (allow no files whatsoever).  However, Standard File
is not documented in such a manner, and this feature may not be TRUE in
the future.  Therefore, we DO check to see if the entry passed to us
describes a file or a directory.  This can be done by checking a bit
in the ioFlAttrib, which is set for folders.}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION FolderFFilter(p: ParmBlkPtr): BOOLEAN;

BEGIN
    FolderFFilter:= NOT BTst(p^.ioFlAttrib, kFolderBit);
END;


FUNCTION GetDirDlgHook(item: INTEGER; dlgPtr: DialogPtr): INTEGER;

VAR
    messageTitle:        Str255;
    iRect:                Rect;
    iHandle:            Handle;
    iKind:                INTEGER;

BEGIN
    GetDirDlgHook:= item;                        {default, return same item}
    CASE item OF
        kFirstTime: BEGIN                        {Read prompt String from resource}
            GetIndString(messageTitle, rStrMisc, sSelectFolder);
            GetDialogItem(dlgPtr, kGetDirMessage, iKind, iHandle, iRect);
            SetDialogItemText(iHandle, messageTitle);
        END;

        kGetDirButton: BEGIN
            IF LONGINT(gReply.fType) <> 0 THEN BEGIN
                gMyCurDir:= LONGINT(gReply.fType);
                GetDirDlgHook:= getOpen;            {simulate Open button}
            END;
        END;

        kGetDirNowButton: BEGIN
            gMyCurDir:= GetSFCurDir;
            GetDirDlgHook:= getOpen;                {simulate Open button}
        END;

        kNullModalEvt: BEGIN
            IF LONGINT(gReply.fType) = kNoSelection THEN BEGIN
                GetDialogItem(dlgPtr, kGetDirButton, iKind, iHandle, iRect);
                HiliteControl(ControlHandle(iHandle), kCntlDeactivate);
            END
            ELSE BEGIN
                GetDialogItem(dlgPtr, kGetDirButton, iKind, iHandle, iRect);
                HiliteControl(ControlHandle(iHandle), kCntlActivate);
            END;
        END;

    END;
END;


PROCEDURE DoGetDirectory;

VAR
    folderName:            Str31;                    {directories can be 31 chars}
    typeList:            SFTypeList;
    myCInfo:            CInfoPBRec;
    err:                OSErr;
    ffUPP:                FileFilterUPP;
    dhUPP:                DlgHookUPP;

BEGIN
    ffUPP := NewFileFilterProc(@FolderFFilter);
    dhUPP := NewDlgHookProc(@GetDirDlgHook);
    SFPGetFile(Point(kSFTopLeft),                {location}
               '',                                {vestigial String}
               ffUPP,                            {file filter}
               kShowAllFiles,                    {numtypes}
               typeList,                        {array to types to show}
               dhUPP,                            {Dialog hook}
               gReply,                            {record for returned values}
               rGetDirectoryDLOG,                {Resource ID dialog}
               NIL);                            {ModalDialog filter proc}
    DisposeRoutineDescriptor(dhUPP);
    DisposeRoutineDescriptor(ffUPP);

    IF gReply.good THEN BEGIN
        folderName:= '';                        {initialize string}
        WITH myCInfo DO BEGIN
            ioCompletion:= NIL;                    {no completion}
            ioNamePtr:= @folderName;            {VAR to string}
            ioFDirIndex:= -1;                    {-1 means use ioDrDirID}
            ioVRefNum:= GetSFVRefNum;             {this is the volume}
            ioDrDirID:= gMyCurDir;                {this is the directory}
        END;
        err:= PBGetCatInfo(@myCInfo, NOT kFSAsynch);
        IF err = noErr THEN
            ShowSelection(folderName, '')
        ELSE
            AlertUser(err, sFileSystem);
    END
    ELSE
        ShowCancelled;
END;


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{DoMultiFile}
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}

{This demonstrates how to get multiple files with one call to Standard
File.  It collects a set of files while in the SFGetFile dialog by using
of a secondary list.  This is similar to the method used by many of the
MPW tools.  The original version of this example was a failed experiment.
It attempted remember all of the files passed to the file filter, and
using those names to create a new, application governed file list that
will replace the one displayed by Standard File.  However, this
experiment seems doomed to failure, for the following reasons:

* Icons are not displayed next to the names of files.  This would require
  a custom LDEF.  The resulting presentation without the small icons was
  more disconcerting that I thought.
* The current directory button (the one displayed above the list of file
  names) disappears.  This seems due to the fact that the pop-up menu-like
  item is not actually a dialog item, and is somehow attached to the list
  of file names handled by Standard File.  Since I move that list off of the
  window so that I can display my own, the current directory button seems
  to go with it.
* Updating the list is difficult.  The normal sequence of events would
  desirably be: 1) have the file filter create a linked list of names to
  appear in the dialog, 2) insert those names into the List Manager list,
  and 3) display the list.  However, by following this outline, the list
  does not get updated, as the update region for that area is empty.  So, at
  some time, we need to invalidate the area that holds our list.  But there
  is no convenient place in which to do that.  We can't call InvalRect
  within our file filter routine, as we don't have the DialogPtr at the
  time (needed to get the bounding rectangle of the list item).  Neither can
  we call InvalRect within step 2, as we are between
  BeginUpdate/EndUpdates, and calling InvalRect would be useless.
* We can't display directories.  They are not offered to the judgement of
  our file filter, and hence cannot be added to our list.
* Key presses would have do be handled manually by our dialog hook.

Considering all of these problems, another possible solution would be to
do away with Standard File altogether and do your own non-Standard File.
You could show a dialog (maybe even a modeless dialog) and contained a
list of file in the selected folder.  This really isn't all too
difficult.  The only disadvantage is that it may not look familiar to the
user, and the MultiFinder hack to force the application's Open item
wouldn't work.  This process is documented in Tech Note 205.

DoMultiFile
-----------
Points to the Dialog Filter and Dialog Hook.  If the user selected the
Open button then there is a handle containing an array of files.  We
index through this array and show some information for each file proving
that we located the file.  Once all the files have been found, then
dispose of the handle.

ListGetDlgHook
--------------
This routine is at the dialog item level, rather than the event level.
Normally, double-clicking on a file name in the Standard File list
simulates a click in the Open button.  We want it to add an item to our
multi-file list instead, so we've turned the Open button into an Add
button and sabotaged it's functionality so that it doesn't dismiss the
Standard File dialog.  Then, we added our own Open button which tricks
the Standard File code into thinking the normal Open button was clicked,
and our dialog is dismissed.

If there was an event (item <> 100) then handle the activating of our
Open button and the Remove buttons.  Activate the Open button if there
are any files in our file list.  Activate the Remove button if there are
any selected files in our file list.  If the Open or Cancel buttons were
selected, then dispose of the list since the user has dismissed the
dialog.

FListDlgFilter
--------------
This routine's raison d'être is to handle clicks in our file list (that
is, OUR file list at the bottom of the dialog; not SF's file list at the
top of the dialog).  If FListDlgFilter weren't around, clicks in our file
list would be ignored.  First we check to see if the mouse was clicked
somewhere in the rectangle of our file list.  If it wasn't, we return
FALSE, and SF handles the event on it's own.  If it was, call LClick and
let the List Manager handle all the hilighting and scrolling.

If there was a mouse click in our file list item, then itemHit returns
the item number of our file list.  If FListDlgFilter found out that the
mouse click wasn't in our file list, then itemHit is unchanged and we
return FALSE which tells the Dialog Manager to figures out which item has
been affected by the latest event.}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION FListDlgFilter(dlgPtr: DialogPtr; VAR evt: EventRecord;
                          VAR itemHit: INTEGER): Boolean;

VAR
    iRect:                Rect;
    clickPos:            Point;
    iHandle:             Handle;
    iKind:                INTEGER;
    ignore:                Boolean;

BEGIN
    FListDlgFilter:= FALSE;                        {initailize result}
    IF evt.what = mouseDown THEN BEGIN            {Only care about mouseDown in our list}
        clickPos:= evt.where;
        GlobalToLocal(clickPos);
        GetDialogItem(dlgPtr, kFileListItem, iKind, iHandle, iRect);
        IF PtInRect(clickPos, iRect) THEN BEGIN
            ignore:= LClick(clickPos, evt.modifiers, gListHandle);
            itemHit:= kFileListItem;
            FListDlgFilter:= TRUE;
        END;
    END;
END;


FUNCTION ListGetDlgHook(item: INTEGER; dlgPtr: DialogPtr): INTEGER;

VAR
    iRect:                Rect;
    iHandle:            Handle;
    iKind:                INTEGER;
    listCell:            Cell;                    {File list cell}

BEGIN
    ListGetDlgHook:= item;                        {default, except in special cases below}
    CASE item OF

        kFirstTime: BEGIN
            GetDialogItem(dlgPtr, kMultiOpenItem, iKind, iHandle, iRect);
            HiliteControl(ControlHandle(iHandle), kCntlDeactivate);
            GetDialogItem(dlgPtr, kRemoveItem, iKind, iHandle, iRect);
            HiliteControl(ControlHandle(iHandle), kCntlDeactivate);
            GetDialogItem(dlgPtr, kFileListItem, iKind, iHandle, iRect);
            CreateFGetList(dlgPtr, iRect, gListHandle);
            SetDialogItem(dlgPtr, kFileListItem, iKind, Handle(@UIPFileList), iRect);
        END; {kFirstTime}

        getOpen: BEGIN                            {old Open button means add a file}
            AddFItem(gReply.fName,GetSFCurDir, GetSFVRefNum, gListHandle);
            ListGetDlgHook:= kNoItem;            {replace item with no item}
        END;

        kMultiOpenItem: BEGIN                    {new Open button means get all files}
            GetFItems(gListHandle);
            ListGetDlgHook:= getOpen;            {replace item with real Open item}
        END;

        kRemoveItem:
            RemoveFItems(gListHandle);            {remove the selected item from list}

    END; {CASE}

    IF item <> kNullModalEvt THEN BEGIN
        GetDialogItem(dlgPtr, kMultiOpenItem, iKind, iHandle, iRect);
        WITH gListHandle^^ DO
            IF dataBounds.top <> dataBounds.bottom THEN
                HiliteControl(ControlHandle(iHandle), kCntlActivate)
            ELSE
                HiliteControl(ControlHandle(iHandle), kCntlDeactivate);
        listCell:= Point(0);
        GetDialogItem(dlgPtr, kRemoveItem, iKind, iHandle, iRect);
        IF LGetSelect(TRUE, listCell, gListHandle) THEN
            HiliteControl(ControlHandle(iHandle), kCntlActivate)
        ELSE
            HiliteControl(ControlHandle(iHandle), kCntlDeactivate);
    END;

    IF (item = kMultiOpenItem) | (item = getCancel) THEN
        LDispose (gListHandle);
END;


PROCEDURE DoMultiFile;

VAR
    msg1:                Str255;
    typeList:            SFTypeList;
    index:                INTEGER;
    numOfFiles:            INTEGER;
    fHPBRec:            HParamBlockRec;
    err:                OSErr;
    theItem:            INTEGER;
    dhUPP:                DlgHookUPP;
    mfUPP:                ModalFilterUPP;

BEGIN
    dhUPP := NewDlgHookProc(@ListGetDlgHook);
    mfUPP := NewModalFilterProc(@FListDlgFilter);
    SFPGetFile(Point(kSFTopLeft),                    {Location of SFDialog}
               '',                                    {Here’s that String thing.}
               NIL,                                 {File filter}
               kShowAllFiles,                        {Number of file types to display}
               typeList,                            {Array of file types to show}
               dhUPP,                                {Std File dialog hook}
               gReply,                                {Record for returned SF info}
               rListGetDLOG,                        {Resource ID of dialog}
               mfUPP);                                {ModalDialog filter proc}
    DisposeRoutineDescriptor(dhUPP);
    DisposeRoutineDescriptor(mfUPP);

    IF gReply.good THEN BEGIN
        numOfFiles:= GetHandleSize(Handle(gMultiFiles)) DIV SizeOf(FileDesc);

        HLock(Handle(gMultiFiles));
        FOR index:= 1 TO numOfFiles DO BEGIN
            WITH fHPBRec DO BEGIN                    {prepare a hParamBlock}
                ioCompletion:= NIL;
                ioNamePtr:= @gMultiFiles^^[index].name;
                ioVRefNum:= gMultiFiles^^[index].vRefNum;
                ioFDirIndex:= 0;
                ioDirID:= gMultiFiles^^[index].parID;
            END;
            err:= PBHGetFInfo(@fHPBRec, NOT kFSAsynch); {fPBRec on stack, synch only}

            IF err = noErr THEN BEGIN
                IUDateString(fHPBRec.ioFlMdDat, longDate, msg1);
                ParamText(gMultiFiles^^[index].name, msg1, '', '');
                theItem:= CenteredAlert(rFInfoAlert);
            END
            ELSE
                AlertUser(err, sFileSystem);
        END;
        DisposeHandle(Handle(gMultiFiles));
    END
    ELSE
        ShowCancelled;
END;


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{Typical SFPutFile example}
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}

{Simplest form of SFPutFile. This routine puts up a PutFile dialog with a
prompt and suggested file name.}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE DoNormalPut;

VAR
    msg:                Str255;                    {prompt String}
    reply:                SFReply;

BEGIN
    GetIndString(msg, rStrMisc, sSaveAsMsg);
    SFPutFile(Point(kSFTopLeft),                {location}
              msg,                                {prompt String}
              'Doug',                            {original name}
              NIL,                                {dialog hook}
              reply);                            {record for returned values}
    IF reply.good THEN
        ShowSelection(reply.fName, '')
    ELSE
        ShowCancelled;
END;


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{SFPPutFile with a Dialog Hook}
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}

{This demonstration is a custom PutFile routine which adds a few items to
the dialog box.  There are two radio buttons that determine what format
the user wants to save the information in.  And there is a Static Text
item that displays the amount of free space left on the disk.  This text
item is updated whenever we detect that the user has switched to another
volume.

DoNormalPPut
------------
This routine calls SFPPutFile.  Note the extra 'P' in the name.  This
Toolbox call allows us to specify a customized dialog box, and dialog
hook that handles hits on special items.  There is a global string used
to show what the file format will be to the user.

MySFPutDlgHook
--------------
A routine that is called to handle the non-standard items in our dialog
box.  These items are:

* The control of two radio buttons that affect the setting of a global
  variable used to determine what format the file will be saved in
* UserItem that displays the amount of free space on the current volume.

The dialog hook is also used to perform some special initialization on
the items in the dialog box.  We initialize our radio buttons, change the
text in the save button, and prepare the user item by initializing the
routine that will draw it and getting the text that will appear in it.

Finally, this routine will force the user item to be drawn once at
initialization time, and when ever the user clicks the Drive button.  By
invalidating the user item rectangle, it causes the drawing procedure to
update according to the current volume which is set by Standard File.

DrawFreeSpace
-------------
This is a user item's drawing procedure.  It is used to display the
amount of free space left on the disk.  All we need to do is update the
text in our userItem.}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE DrawFreeSpace(theWindow: WindowPtr; itemNo: INTEGER);

VAR
    convert:            TwoIntsMakesALong;
    myStr1, myStr2:        Str255;
    iHandle:            Handle;
    iKind:                INTEGER;
    iRect:                Rect;
    err:                OSErr;
    space:                LONGINT;

BEGIN
    space:= GetKFreeSpace(GetSFVRefNum);
    IF space < 0 THEN
        myStr1:= '??'                            {we couldn't get the free space size!}
    ELSE
        NumToString(space, myStr1);
    GetIndString(myStr2, rStrMisc, sKFree);        {Text to be added in our user item.}
    myStr1:= CONCAT(myStr1, myStr2);
    GetDialogItem(DialogPtr(theWindow), kSFPPutFreeSpace, iKind, iHandle, iRect);
    TETextBox(@myStr1[1], LENGTH(myStr1), iRect, teJustCenter);
END;


FUNCTION MySFPutDlgHook(item: INTEGER; dlgPtr: DialogPtr): INTEGER;


VAR
    saveStr:            Str255;                 {replacement name for Save button}
    iRect:                Rect;
    iHandle:            Handle;
    iKind:                INTEGER;

BEGIN
    MySFPutDlgHook:= item;
    CASE item OF

        kFirstTime: BEGIN
            SetRadioButton(dlgPtr, kSFPPutTextBtn, kCntlOff);
            GetDialogItem(dlgPtr, kSFPPutNormalBtn, iKind, iHandle, iRect);
            SetControlValue(ControlHandle(iHandle), kCntlOn);
            GetControlTitle(ControlHandle(iHandle), gPutFormat);
            GetDialogItem(dlgPtr, kSFPPutFreeSpace, iKind, iHandle, iRect);
            SetDialogItem(dlgPtr, kSFPPutFreeSpace, iKind, Handle(@DrawFreeSpace), iRect);
            InvalRect(iRect);                    {force item to update}
        END;

        getDrive: BEGIN
            GetDialogItem(dlgPtr, kSFPPutFreeSpace, iKind, iHandle, iRect);
            InvalRect(iRect);
        END;

        kSFPPutNormalBtn: BEGIN
            IF NOT gNormal THEN BEGIN
                SetRadioButton(dlgPtr, kSFPPutTextBtn, kCntlOff);
                GetDialogItem(dlgPtr, kSFPPutNormalBtn, iKind, iHandle, iRect);
                SetControlValue(ControlHandle(iHandle), kCntlOn);
                GetControlTitle(ControlHandle(iHandle), gPutFormat);
                gNormal:= TRUE;                    {change our flag accordingly}
            END;
        END;

        kSFPPutTextBtn: BEGIN
            IF gNormal THEN BEGIN
                SetRadioButton(dlgPtr, kSFPPutNormalBtn, kCntlOff);
                GetDialogItem(dlgPtr, kSFPPutTextBtn, iKind, iHandle, iRect);
                SetControlValue(ControlHandle(iHandle), kCntlOn);
                GetControlTitle(ControlHandle(iHandle), gPutFormat);
                gNormal:= FALSE;                {change our flag accordingly}
            END;
        END;

    END; {CASE}
END;


PROCEDURE DoNormalPPut;

VAR
    msg:                Str255;                    {prompt String}
    reply:                SFReply;
    dhUPP:                DlgHookUPP;

BEGIN
    gNormal:= TRUE;
    GetIndString(msg, rStrMisc, sSaveAsMsg);

    dhUPP := NewDlgHookProc(@MySFPutDlgHook);
    SFPPutFile(Point(kSFTopLeft),                {location}
               msg,                             {prompt String}
               'Doug',                            {original name}
               dhUPP,                            {dialog hook}
               reply,                            {record for returned values}
               rSFPPutFileDLOG,                 {ID of custom Dialog}
               NIL);                            {ModalDialog filterProc}
    DisposeRoutineDescriptor(dhUPP);

    IF reply.good THEN
        ShowSelection(reply.fName, gPutFormat)
    ELSE
        ShowCancelled;
END;


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{DoForceDirectory}
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}

{This is a quick sample that shows how to set the initial directory that
Standard File comes up with.  Basically, this is done by storing
appropriate values into SFSaveDisk and CurDirStore.  In this example, I
force the directory to be the System Folder of the boot volume as
specified by SysEnvirons.  Since I like to be user friendly, I save and
restore the current folder.  So the next time Standard File is called it
will be exactly where the user left it.}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE DoForceDirectory;

VAR
    msg:                Str255;                    {prompt String}
    typeList:            SFTypeList;
    oldDirStore:        LONGINT;
    dirID:                LONGINT;
    procID:                LONGINT;
    vRefNum:            INTEGER;
    oldVRefNum:            INTEGER;
    reply:                SFReply;
    err:                OSErr;

BEGIN
    oldDirStore:= GetSFCurDir;                    {save old folder and volume}
    oldVRefNum:= GetSFVRefNum;
    err:= GetWDInfo(gMac.sysVRefNum, vRefNum, dirID, procID);
    IF err = noErr THEN BEGIN
        SetSFCurDir(dirID);
        SetSFVRefNum(vRefNum);
        GetIndString(msg, rStrMisc, sSaveAsMsg);
        SFPutFile(Point(kSFTopLeft),            {location}
                  msg,                            {prompt String}
                  'Doug',                        {original name}
                  NIL,                            {dialog hook}
                  reply);                        {record for returned values}
        IF reply.good THEN
            ShowSelection(reply.fName, '')
        ELSE
            ShowCancelled;
        SetSFCurDir(oldDirStore);                 {restore old folder and volume}
        SetSFVRefNum(oldVRefNum);
    END
    ELSE
        AlertUser(err, sStandardErr);
END;


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{DoPutListsFile}
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}

{This sample demonstrates putting a List Manager list into an SFPPutFile
dialog, describes a problem that can occur by doing so, and shows one
solution to the problem.  Putting another list into a Standard File
dialog can be useful for a number of reasons.  While *I* can't think of a
reason I would want to put a second list into a PutFile dialog, it is
possible that you may wish to.  The best example that I could think of is
a list of file types for the user to choose.  However, there is a subtle
problem that arises if you do: in the following example, if were to
dispose of the list when the user clicked on Save, we may hit a snag.  It
is possible for the user to specify the name of a file that already
exists.  When that happens, s/he is presented with another dialog that
asks if they are sure of what they are doing.  At that point, the user
could press Cancel, and return us to the PutFile dialog, SANS our second
list! Neither can we defer disposing of list until Standard File is done
and returns to our application, as the Dialog box we were using is gone,
and the List Manager tries to perform an InvalRect on a non-existent
window when it erases its list and that will crash.

There are two solutions to this problem:

* Implement the list as a Custom Control.  Then, when it comes time to
  close the dialog box, the custom control will get called with a dispCntl
  message.  It can take that opportunity to call LDispose.  This technique
  is not presented here, as it is more appropriate for a Custom Control
  Sample program.  However, it is the suggested way to proceed.

* Ensure that the confirmation dialog box never comes up under Standard
  File's control.  By calling it ourself, we know what the user chooses.  If
  the user presses OK, we delete the offending file, dispose of our list,
  and return to Standard File.  If the user presses Cancel, we change the
  click on the Save button into a NULL event.  This is the algorithm we use
  below.

There is a major disadvantage with this last approach, however.  With it,
we cannot implement a safe saving procedure.  Normally, the best way to
save a file (disk space permitting), is to save the data to a temporary
file, delete the original, and then rename the temporary file to that of
the original.  However, with the second approach, the file is deleted well
before it is safe to do so.

This example *could* be reworked to avoid this problem.  For instance,
instead of being deleted, the offending file could be renamed to
something else or moved to another directory.

DoPutListsFile
--------------
We force the current folder of Standard File to be the location of the
temporary file that we've created.  This is to attempt to make the
Existing File? dialog show up.  Being a user friendly application, we
save and restore the user's current folder.  If the user did happen to
select to replace the file, we create a new one for the next time.

PutListsDlglFilter
------------------
The Dialog Filter is used to handle clicks in the List Manager list.

PutListsDlgHook
---------------
The initialization case is used to create a list of file types.  It also
jams in the name of the temporary file that we are using.  This is to try
and force the "Replace file?" dialog to show up.  This is only part of
the demonstration, not something that programs would really be doing.  If
the user attempts to save the file with the name of an existing file,
then the Existing File alert needs to be shown.  This is centered within
the main dialog alert properly according to the Human Interface Guidelines.

LNPFDrawList
------------
Dialog Manager's user item drawing procedure to update the List Manager
list.}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE LNPFDrawList(theWindow: WindowPtr; item: INTEGER);

BEGIN
    IF item = kListItem THEN BEGIN
        LUpdate(theWindow^.visRgn, gListHandle);
        DrawItemFrame(theWindow, kListItem);
    END;
END;


FUNCTION PutListsDlgHook(item: INTEGER; dlgPtr: DialogPtr): INTEGER;

VAR
    name:                Str63;
    fndrInfo:            FInfo;
    dLoc:                Point;
    iRect:                Rect;
    alertRect:            Rect;
    iHandle:            Handle;
    alertHandle:        AlertTHndl;
    parID:                LONGINT;
    vRefNum:             INTEGER;
    replaceItem:         INTEGER;
    iKind:                 INTEGER;
    choice:             INTEGER;
    err:                OSErr;

BEGIN
    replaceItem:= item;
    vRefNum:= GetSFVRefNum;
    parID:= GetSFCurDir;
    CASE replaceItem OF

        kFirstTime: BEGIN
            GetDialogItem(dlgPtr, kListItem, iKind, iHandle, iRect);
            CreateFPutList(dlgPtr, iRect, gListHandle, gPutFormat);
            SetDialogItem(dlgPtr, kListItem, iKind, Handle(@LNPFDrawList), iRect);
            name:= GetTempFileName;
            GetDialogItem(dlgPtr, putName, iKind, iHandle, iRect);
            SetDialogItemText(iHandle, name);
            TESetSelect(0, LENGTH(name), DialogPeek(dlgPtr)^.textH);
        END;

        putSave: BEGIN
            err:= HGetFInfo(vRefNum, parID, gReply.fName, fndrInfo);
            IF err = noErr THEN BEGIN            {if GetFInfo = noErr, then}
                                                {this file already exists.}

                alertHandle:= AlertTHndl(Get1Resource('ALRT', kExistingFileALRT));
                HNoPurge(Handle(alertHandle));    {keep is around}
                alertRect:= alertHandle^^.boundsRect;
                GlobalToLocal(alertRect.topLeft);
                GlobalToLocal(alertRect.botRight);
                PositionTwoRects(dlgPtr^.portRect, alertRect, FixRatio(1,2), FixRatio(1,3));
                LocalToGlobal(alertRect.topLeft);
                LocalToGlobal(alertRect.botRight);
                alertHandle^^.boundsRect:= alertRect;
                ParamText(gReply.fName, '', '', '');
                choice:= Alert(kExistingFileALRT, NIL);
                HPurge(Handle(alertHandle));    {let it go}
                IF choice = kReplaceItem THEN
                    err:= HDelete(vRefNum, parID, gReply.fName)
                ELSE                            {Change "Save" into null event}
                    replaceItem:= kNullModalEvt;
            END;
        END;

    END; {CASE}
    IF (replaceItem = putSave) | (replaceItem = putCancel) THEN
        DisposeFPutList(gListHandle, gPutFormat);
    PutListsDlgHook:= replaceItem;
END;


FUNCTION PutListsDlglFilter(dlgPtr: DialogPtr; VAR evt: EventRecord;
                                 VAR itemHit: INTEGER): BOOLEAN;

VAR
    localPt:            Point;
    ignore:                BOOLEAN;

BEGIN
    IF evt.what = mouseDown THEN BEGIN
        localPt:= evt.where;
        GlobalToLocal(localPt);
        ignore:= LClick(localPt, evt.modifiers, gListHandle);
    END;
    PutListsDlglFilter:= FALSE;
END;


PROCEDURE DoPutListsFile;

VAR
    msg:                Str255;                    {prompt String}
    fName:                Str63;
    oldDirStore:        LONGINT;
    oldVRefNum:            INTEGER;
    err:                INTEGER;
    dhUPP:                DlgHookUPP;
    mfUPP:                ModalFilterUPP;

BEGIN
    oldDirStore:= GetSFCurDir;                    {save old folder and volume}
    oldVRefNum:= GetSFVRefNum;
    SetSFCurDir(gAppParID);                        {force to our app folder}
    SetSFVRefNum(gAppVRefNum);

    GetIndString(msg, rStrMisc, sSaveAsMsg);

    dhUPP := NewDlgHookProc(@PutListsDlgHook);
    mfUPP := NewModalFilterProc(@PutListsDlglFilter);
    SFPPutFile(Point(kSFTopLeft),                {location}
               msg,                             {prompt String}
               '',                                {original name}
               dhUPP,                            {dialog hook}
               gReply,                            {record for returned values}
               rPutListsFileDLOG,                {ID of custom Dialog}
               mfUPP);                            {ModalDialog filterProc}
    DisposeRoutineDescriptor(dhUPP);
    DisposeRoutineDescriptor(mfUPP);

    IF gReply.good THEN BEGIN
        ShowSelection(gReply.fName, gPutFormat);
        fName:= GetTempFileName;
        IF gReply.fName = fName THEN
            err:= HCreate(gAppVRefNum, gAppParID, fName, rAppSignature, 'TEMP');
    END
    ELSE
        ShowCancelled;

    SetSFCurDir(oldDirStore);                    {restore old folder and volume}
    SetSFVRefNum(oldVRefNum);
END;


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{DoPutOptions with a Dialog Hook}
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}

{This demonstration add a new button to the SFPutFile dialog.  This button
is used to bring up another dialog used to show a set of radio buttons.
The options dialog allows the user to select a file type, which will be
used to as the file format when saving the file.

DoPutOptions
------------
Very simple version of creating a SFPPutFile dialog with a Dialog Hook
that checks for the addition button being selected.

PutOptionsDlgHook
-----------------
If the Options button is selected, then we bring up the options dialog.
The default button is outlined and we wait for the OK or Cancel item.
The new format is the item that was hit within the options dialog.  The
title of this item is displayed to the user in the SFPutFile dialog
showing the new file format.}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION PutOptionsDlgHook(item: INTEGER; dlgPtr: DialogPtr): INTEGER;

VAR
    title:                Str255;
    dlogTemplate:        DialogTHndl;
    subDlgPtr:            DialogPtr;
    dlogRect:            Rect;
    iRect:                Rect;
    iHandle:            Handle;
    itemHit:            INTEGER;
    iKind:                INTEGER;
    newItem:            INTEGER;
    oldPort:            GrafPtr;

BEGIN
    PutOptionsDlgHook:= item;
    CASE item OF

        kOptionsButton: BEGIN
            GetPort(oldPort);

            dlogTemplate := DialogTHndl(Get1Resource('DLOG', rOptionsSubDLOG));
            dlogRect:= dlogTemplate^^.boundsRect;
            GlobalToLocal(dlogRect.topLeft);
            GlobalToLocal(dlogRect.botRight);
            PositionTwoRects(dlgPtr^.portRect, dlogRect, FixRatio(1,2), FixRatio(1,3));
            LocalToGlobal(dlogRect.topLeft);
            LocalToGlobal(dlogRect.botRight);
            dlogTemplate^^.boundsRect:= dlogRect;

            subDlgPtr:= GetNewDialog(rOptionsSubDLOG, NIL, WindowPtr(-1));
            GetDialogItem(subDlgPtr, OK, iKind, iHandle, iRect);
            OutlineButton(ControlHandle(iHandle));
            SetRadioButton(subDlgPtr, kDefaultFormat, kCntlOn);
            GetDialogItem(subDlgPtr, kFrameItem, iKind, iHandle, iRect);
            SetDialogItem(subDlgPtr, kFrameItem, iKind, Handle(@DrawItemFrame), iRect);
            newItem:= kDefaultFormat;
            REPEAT
                ModalDialog(NIL, itemHit);
                IF (itemHit <> newItem) & (itemHit > cancel) THEN BEGIN
                    SetRadioButton(subDlgPtr, newItem, kCntlOff);
                    SetRadioButton(subDlgPtr, itemHit, kCntlOn);
                    newItem:= itemHit;
                END;
            UNTIL (itemHit = OK) | (itemHit = Cancel);

            IF itemHit = OK THEN BEGIN
                GetDialogItem(subDlgPtr, newItem, iKind, iHandle, iRect);
                GetControlTitle(ControlHandle(iHandle), gPutFormat);
                GetDialogItem(dlgPtr, kFormatString, iKind, iHandle, iRect);
                SetDialogItemText(iHandle, gPutFormat);
            END;
            DisposeDialog(subDlgPtr);
            SetPort(oldPort);
        END;

    END; {CASE}
END;


PROCEDURE DoPutOptions;

VAR
    msg:                Str255;                    {prompt String}
    reply:                SFReply;
    dhUPP:                DlgHookUPP;

BEGIN
    GetIndString(msg, rStrMisc, sSaveAsMsg);

    dhUPP := NewDlgHookProc(@PutOptionsDlgHook);
    SFPPutFile(Point(kSFTopLeft),                {location}
                msg,                             {prompt String}
                'Doug',                            {original name}
                dhUPP,                             {dialog hook}
                reply,                            {record for returned values}
                rOptionsDLOG,                    {ID of custom Dialog}
                NIL);                            {ModalDialog filterProc}
    DisposeRoutineDescriptor(dhUPP);

    IF reply.good THEN
        ShowSelection(reply.fName, gPutFormat)
    ELSE
        ShowCancelled;
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{DoIdleUpdates}
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}

{This demonstrates two things: how to handle idle events and how to
determine the currently selected file.  There is a problem that Standard
File has when updates are pending in background windows of the current
application partition.  Standard File calls ModalDialog at the heart of
its main loop.  ModalDialog calls GetNextEvent, and then calls a
filterProc internal to Standard File.  This filterProc performs some
processing on the event, (like handling hits on the filename list, the
Current Directory button, and the Disk Name Icon), and then calls the
user filterProc specified in SFPPutFile or SFPGetFile calls.  Another one
of the things that the internal filterProc does is look for a nullEvent.
When one is found, the filterProc returns 100 as the "itemHit".  This
forces ModalDialog to return to Standard File, which in turn can now call
the Dialog Hook with the manufactured item number 100, indicating that
idle time processing can be performed.

The problem occurs when there are updates pending in windows open in the
current application's partition.  These updates will 'clog' the event
queue.  When ModalDialog calls GetNextEvent, it will get the update event.
However, there is no way for ModalDialog to respond to them.  It therefore
passes the event off to the filterProc, which is Standard File's internal
one.  This filterProc doesn't know how to handle it either.  Normally, the
event would be ignored at this point, and the update event would be
unresolved.  Control returns back to ModalDialog, which calls GetNextEvent
again, and gets the another update event since it wasn't handled.  Null
events will not get returned by GetNextEvent and, hence, the dialog hook
will never get called with itemHit=100.

This situation can be solved by providing your own filterProc procedure
to be called after Standard File's's internal Dialog Filter.  It will be
this routine's responsibility to check for update events, and handle them
appropriately.  Usually, this would mean that the update procedure within
the application would be called, and the update could be cleared by
BeginUpdate/EndUpdate.  However, the filterProc could also just handle
update events in the same way that Standard File's filterProc handles
null events.  This is done by returning 100 in the ItemHit parameter and
TRUE as the function result.  This is the approach taken by the sample
below.

DoIdleUpdates
-------------
Create a window with a non-empty update region then call up SFPGetFile
with a Dialog Hook and Dialog Filter.

IdleDlgFilter
-------------
If we get an update event for a window other than the dialog box, change
it to a null event, and tell ModalDialog that we handled it.  This allows
our Dialog Hook idle time.

IdleDlgHook
-----------
All it does is wait around for null events and draws the current time
when it gets one.  Note that this routine will NOT get called with
item=100 if we did not have the IdleDlgFilter below.  Determining if
there is an item selected is straight forward, once you know the secret.
During the idle event the SFReply record will contain the file name if a
file is selected.  (It's also worth noting here that if the fName field
is NIL, this could mean a folder is selected.  If this were the case then
fType will be the DirID of that folder!  Pretty cool huh?)

Given that we can determine the name of the file, it's easy to find out
the size.  So, just for fun we'll show the file's size on the disk to the
user.  ioFlPyLen is the physical size of the file on the device.  Logical
size would be the actual size of the file in memory.  In other words,
GetEOF returns the logical size.  The data and resource fork's physical
sizes are added together to give the true size of the entire file on the
volume.}


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

FUNCTION IdleDlgHook(item: INTEGER; dlgPtr: DialogPtr): INTEGER;

VAR
    newStr:             Str255;
    itemStr:            Str255;
    conCatStr:            Str255;
    hPBRec:                HParamBlockRec;
    dateTime:            LONGINT;
    totalSize:            LONGINT;                {size of file in k bytes}
    iRect:                Rect;
    iHandle:            Handle;
    iKind:                INTEGER;
    err:                OSErr;

BEGIN
    IdleDlgHook:= item;
    IF item = kNullModalEvt THEN BEGIN
        GetDateTime(dateTime);
        IUTimeString(dateTime, kWantSeconds, newStr);
        GetDialogItem(dlgPtr, kTimeItem, iKind, iHandle, iRect);
        GetDialogItemText(iHandle, itemStr);
        IF newStr <> itemStr THEN
            SetDialogItemText(iHandle, newStr);

        GetDialogItem(dlgPtr, kSizeItem, iKind, iHandle, iRect);
        GetDialogItemText(iHandle, itemStr);
        IF gReply.fName <> '' THEN BEGIN
            WITH hPBRec DO BEGIN
                ioCompletion:= NIL;
                ioNamePtr:= @gReply.fName;
                ioVRefNum:= GetSFVRefNum;
                ioFDirIndex:= 0;
                ioDirID:= GetSFCurDir;
            END;
            err:= PBHGetFInfo(@hPBRec, NOT kFSAsynch);
            IF err = noErr THEN BEGIN
                newStr:= gReply.fName;
                newStr[0]:= CHR(INTEGER(newStr[0]) + 1);
                newStr[LENGTH(newStr)]:= ' ';

                totalSize:= (hPBRec.ioFlPyLen + hPBRec.ioFlRPyLen) DIV 1024;
                NumToString(totalSize, conCatStr);
                newStr:= CONCAT(newStr, conCatStr);

                GetIndString(conCatStr, rStrMisc, sFileSize);
                newStr:= CONCAT(newStr, conCatStr);

                IF newStr <> itemStr THEN
                    SetDialogItemText(iHandle, newStr);
            END
            ELSE
                SetDialogItemText(iHandle, '??');
        END
        ELSE
            SetDialogItemText(iHandle, '');
    END;
END;


FUNCTION IdleDlgFilter(dlgPtr: DialogPtr; VAR evt: EventRecord;
                        VAR itemHit: INTEGER): BOOLEAN;

BEGIN
    IdleDlgFilter:= FALSE;
    IF (evt.what = updateEvt) & (DialogPtr(evt.message) <> dlgPtr) THEN BEGIN
        itemHit:= kNullModalEvt;
        IdleDlgFilter:= TRUE;
    END;
END;


PROCEDURE DoIdleUpdates;

VAR
    typeList:            SFTypeList;
    window:                WindowPtr;
    dhUPP:                DlgHookUPP;
    mfUPP:                ModalFilterUPP;

BEGIN
    window:= GetNewWindow(rUpdateWindow, NIL, Pointer(-1));

    dhUPP := NewDlgHookProc(@IdleDlgHook);
    mfUPP := NewModalFilterProc(@IdleDlgFilter);
    SFPGetFile(Point(kSFTopLeft),                {location}
               '',                                {vestigial String}
               NIL,                             {file filter}
               kShowAllFiles,                    {numtypes}
               typeList,                        {array to types to show}
               dhUPP,                            {Dialog Hook}
               gReply,                            {record for returned values}
               rGetIdleUpdates,                    {ID of Normal Dialog}
               mfUPP);                            {ModalDialog filterProc}
    DisposeRoutineDescriptor(dhUPP);
    DisposeRoutineDescriptor(mfUPP);

    CloseWindow(window);
    IF gReply.good THEN
        ShowSelection(gReply.fName, '')
    ELSE
        ShowCancelled;
END;


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{DoRememberFile}
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}

{This demonstrates how to ask the user to locate a file and then how the
application should remember it.  The proper way to do this is use the
volume name, directory ID and file name.  Do not use the vRefNum.  It
could be a working directory which will change, probably as soon as your
application quits.  It could also be a real vRefNum but that could change
as soon as the user re-boots.  Directory ID do not change unless the user
deletes the folder.  No matter where the user places that folder or if
they rename it, the DirID will be the same.

Real applications should have a preference file.  This would store the
users options, such as the location of a file.  For the purposes of this
demonstration, we're using the application's resource fork to hold the
file's location.  Some potential problem with the method is if the file
is locked, the volume is lock, or the application is on a shared volume
by many different users.

RecallFile
----------
Get the application defined resource and see if the file it describes can
be used to locate a file.  Start by changing the volume name into a
vRefNum.  If this works, then a volume with that name is mounted.  Then
we attempt to show a dialog that displays some information to the user
proving we've located their file.  If we could not locate the file, then
we ask them to locate another one and we'll try again next time.

DoRememberFile
--------------
Call upon SFGetFile to ask the user to select a file.  Then change the
working directory number returned in vRefNum into a real vRefNum and
DirID.  The real vRefNum is then used to option the volume name.  This
information along with the file name is saved into an application defined
resource and saved.}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE DoRememberFile;

VAR
    volName:            Str27;
    typeList:            SFTypeList;
    reply:                SFReply;
    myWDPBRec:            WDPBRec;
    rememberFile:        FileDescHdl;
    err:                OSErr;

BEGIN
    SFGetFile(Point(kSFTopLeft),                {location}
              '',                                {prompt String}
              NIL,                                {file filter}
              kShowAllFiles,                    {numtypes}
              typeList,                         {array to types to show}
              NIL,                                {dialog hook}
              reply);                            {record for returned values}
    IF reply.good THEN BEGIN
        ShowSelection(reply.fName, '');
        volName:= '';                            {best to empty volName}
        WITH myWDPBRec DO BEGIN                    {set up WDPBRec}
            ioNamePtr:= @volName;
            ioVRefNum:= reply.vRefnum;
            ioWDIndex:= 0;
            ioWDProcID:= 0;
        END;
        err:= PBGetWDInfo(@myWDPBRec, NOT kFSAsynch);
        IF err = noErr THEN BEGIN
            rememberFile:= FileDescHdl(Get1Resource('FILE', rMemorizedFile));
            IF rememberFile <> NIL THEN BEGIN
                rememberFile^^.name:= reply.fName;
                rememberFile^^.parID:= myWDPBRec.ioWDDirID;
                rememberFile^^.volName:= volName;
                ChangedResource(Handle(rememberFile));
                WriteResource(Handle(rememberFile));
            END
            ELSE
                AlertUser(ResError, sResErr);
        END
        ELSE
            AlertUser(err, sFileSystem);
    END
    ELSE
        ShowCancelled;
END;


PROCEDURE RecallFile;

VAR
    rememberFile:        FileDescHdl;
    vRefNum:            INTEGER;
    err:                OSErr;

BEGIN
    rememberFile:= FileDescHdl(Get1Resource('FILE', rMemorizedFile));
    IF rememberFile <> NIL THEN BEGIN
        HLock(Handle(rememberFile));
        WITH rememberFile^^ DO BEGIN
            err:= GetVol(@volName, vRefNum);
            IF err = noErr THEN
                err:= ShowFoundFile(name, parID, vRefNum);
        END;
        HUnlock(Handle(rememberFile));
        IF err <> noErr THEN BEGIN                {catch any file errors}
            AlertUser(noErr, sLostFile);
            DoRememberFile;
        END;
    END
    ELSE
        AlertUser(ResError, sResErr);
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE DoCommand(mResult: LONGINT);

{Performed the selected menu command}

VAR
    name:                Str255;
    oldPort:            GrafPtr;
    theItem:            INTEGER;
    theMenu:            INTEGER;
    daRefNum:            INTEGER;
    ignore:             BOOLEAN;

BEGIN
    theItem:= LoWord(mResult);
    theMenu:= HiWord(mResult);

    CASE theMenu OF

        mApple:
            IF theItem = iAboutMe THEN
                DoAbout
            ELSE BEGIN
                GetMenuItemText(GetMenuHandle(mApple), theItem, name);
                GetPort(oldPort);
                daRefNum:= OpenDeskAcc(name);
                SetPort(oldPort);
            END;

        mFile:
            CASE theItem OF
                iQuit:
                    Terminate;
            END;

        mEdit:
            ignore:= SystemEdit(theItem - 1);

        mSFExamples: BEGIN
            CASE theItem OF
                iNormalGet:
                    ShowPath;
                iNormalPGet:
                    DoNormalPGet;
                iFileFilter:
                    DoFFilter;
                iGetDirectory:
                    DoGetDirectory;
                iMultiFile:
                    DoMultiFile;
                iNormalPut:
                    DoNormalPut;
                iNormalPPut:
                    DoNormalPPut;
                iForceDirectory:
                    DoForceDirectory;
                iPutListsFile:
                    DoPutListsFile;
                iPutOptions:
                    DoPutOptions;
                iIdleUpdates:
                    DoIdleUpdates;
                iRememberFile:
                    DoRememberFile;
            END; {CASE}
        END;
    END;
    HiliteMenu(0);                                {unhighlight all menus}
END;


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

PROCEDURE EventLoop;

{Chances are, you've seen an event loop before so I'm not going to
comment about it.}

CONST
    osEvt                = app4Evt;                {defined in post MPW 3.0 Events.p}
    suspendResumeMessage = 1;                    {defined in post MPW 3.0 Events.p}
    kGetHighByte        = 24;                    {24 bits (three bytes) to shift right}
    kResumeMask         = 1;                    {resume event is low bit of message}

VAR
    evt:                EventRecord;
    whichWindow:        WindowPtr;                {used for FindWindow}
    deskPart:            INTEGER;                {result from FindWindow}
    err:                OSErr;
    haveEvent:            BOOLEAN;                {TRUE if interesting event}

BEGIN
    REPEAT
        IF gHasWaitNextEvent THEN
            haveEvent:= WaitNextEvent(everyEvent, evt, MAXLONGINT, NIL)
        ELSE BEGIN
            SystemTask;
            haveEvent:= GetNextEvent(everyEvent, evt);
        END;

        deskPart:= FindWindow(evt.where, whichWindow);
        IF deskPart <> inSysWindow THEN
            SetCursor(qd.arrow);

        IF haveEvent THEN BEGIN
            CASE evt.what OF

                mouseDown:
                    CASE deskPart OF
                        inSysWindow:
                            SystemClick(evt, whichWindow);
                        inMenuBar:
                            DoCommand(MenuSelect(evt.where));
                    END;

                keyDown, autoKey:
                    IF BAND(evt.modifiers, cmdKey) <> 0 THEN
                        DoCommand(MenuKey(CHR(BAND(evt.message, charCodeMask))));

                diskEvt: {Call DIBadMount in response to a diskEvt}
                    IF HiWord(evt.message) <> noErr THEN
                        err:= DIBadMount(Point(kSFTopLeft), evt.message);

                osEvt: BEGIN
                    CASE BSR(evt.message, kGetHighByte) OF
                        suspendResumeMessage: BEGIN
                            IF BAND(evt.message, kResumeMask) <> 0 THEN BEGIN
                                gInBackground:= FALSE;
                            END
                            ELSE gInBackground:= TRUE; {suspend event}
                        END; {suspendResumeMessage}
                    END;
                END;

            END; {CASE}
        END;
    UNTIL FALSE;                                {loop forever, quit through Terminate}
END;

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Initialize}

PROCEDURE Initialize;

{Due to some bug in older versions of A/UX regarding working directories,
I check which verison we might be running if any.  If A/UX isn't running,
then the version will be zero.  Other wise it will be set to the major
version number, such as 2 for 2.0.  I want to make sure that enough
memory is free for my application to run.  It is possible that user may
have adjusted the SIZE resource to too small a setting or for some other
reason the application started up in a very small memory partition.  I
preform this check after initializing all the Toolbox and the basic
features of this application.  The pentultimate thing is to save the
default directory and volume that the application is launched from in two
globals and create a temporary file.  This file is only used for
demonstration purposes.  Finally, we check if the file we last remembered
can be found.}

VAR
    fName:                Str63;
    event:                EventRecord;
    menuBar:            Handle;
    apParam:            Handle;
    ignoreError:        OSErr;
    count:                 INTEGER;
    auxVersion:            INTEGER;
    appResRef:            INTEGER;
    err:                OSErr;
    ignoreResult:        Boolean;

BEGIN
    gInBackground:= FALSE;                        {we’ll be in the foreground soon}
    gHasWaitNextEvent := TrapExists(_WaitNextEvent);

    FOR count:= 1 TO kNumberOfMasters DO        {allocate master pointer blocks}
        MoreMasters;
    InitGraf(@qd.thePort);                            {init managers, yawn...}
    InitFonts;
    InitWindows;
    InitMenus;
    TEInit;
    InitDialogs(NIL);
    InitCursor;

{This code is necessary to pull the application into the foreground.  I use
 EventAvail because I don’t want to remove any events the user may have
 done, such as typing ahead.  Until the application has made a few calls (3
 seems to be the magic number) to the Event Manager, MultiFinder keeps me
 in the background.   Splashscreens and Alerts will remain in a background
 layer until we get a few events.  This is documented in Tech Note #180.}

    FOR count:= 1 TO kBroughtToFront DO
        ignoreResult:= EventAvail(everyEvent, event);

    auxVersion:= GetAUXVersion;
    IF (auxVersion < kMinAUXVersion) & (auxVersion > 0) THEN
        EmergencyExit(sOldAUX);

    ignoreError:= SysEnvirons(kSysEnvironsVersion, gMac);
    IF (gMac.machineType < envMachUnknown) THEN    {we use HFS}
        EmergencyExit(sNoHFS);

    menuBar := GetNewMBar(rMenuBar);            {read menus into menu bar}
    IF menuBar = NIL THEN
        EmergencyExit(sNoMenus);
    SetMenuBar(menuBar);                        {install menus}
    DisposeHandle(menuBar);
    AppendResMenu(GetMenuHandle(mApple), 'DRVR');     {add DA names to Apple menu}
    DrawMenuBar;

    IF FailLowMemory(kMinSpace) THEN
        EmergencyExit(sLowMemory);

    GetAppParms(gAppName, appResRef, apParam);
    err:= MyHGetVol(NIL, gAppVRefNum, gAppParID);
    err:= HCreate(gAppVRefNum, gAppParID, GetTempFileName, rAppSignature, 'TEMP');

    RecallFile;                                    {what was that file?}
END;


{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
PROCEDURE _DataInit; EXTERNAL;

{This routine is contained in the MPW runtime library.    It will be placed
into the code segment used to initialize the A5 globals.  This external
reference to it is done so that we can unload that segment, named %A5Init.}

{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ MAIN PROGRAM ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{$S Main}

BEGIN
    UnLoadSeg(@_DataInit);                        {note: _DataInit must not be in Main!}

    {If you have stack requirements that differ from the default, then you
    could use SetApplLimit to increase StackSpace at this point, before
    calling MaxApplZone.}

    MaxApplZone;                                {expand the heap so code segments load at
                                                    the top}
    Initialize;                                 {initialize the program}
    UnLoadSeg(@Initialize);                     {note: Initialize must not be in Main!}
    EventLoop;                                    {call the main event loop}
END.
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ MAIN PROGRAM ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}
{~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~}