/*

    File:       NonThreadedProgress.c

    Contains:   Progress bar implementation without using the Threads Manager

    Written by: Chris White 

    Copyright:  Copyright © 1996-1999 by Apple Computer, Inc., All Rights Reserved.

                You may incorporate this Apple sample source code into your program(s) without

                restriction. This Apple sample source code has been provided "AS IS" and the

                responsibility for its operation is yours. You are not permitted to redistribute

                this Apple sample source code as "Apple sample source code" after having made

                changes. If you're going to re-distribute the source, we require that you make

                it clear in the source that the code was descended from Apple sample source

                code, but that you've made changes.

    Change History (most recent first):

                8/10/1999   Karl Groethe    Updated for Metrowerks Codewarror Pro 2.1

*/

#pragma segment Core

// System Includes

#ifndef __DIALOGS__

    #include <Dialogs.h>

#endif

// Application Includes

#ifndef __BAREBONES__

    #include "BareBones.h"

#endif

#ifndef __PROTOTYPES__

    #include "ProtoTypes.h"

#endif

// static prototypes

static void     DrawProgressBar ( DialogRef theDialog, int doneAmount, int maxAmount );

OSErr ProgressOperation ( tOperation theOperation, void* refCon, StringPtr theText )

{

    Boolean         bCancelled = false;

    OSErr           theErr = noErr;

    SInt16          theType;

    GrafPtr         savePort;

    DialogRef       theDialog = nil;

    Handle          theHan;

    Rect            theRect;

    theDialog = GetNewDialog ( kProgressDialogID, nil, (WindowPtr) -1 );

    GetPort ( &savePort );

    SetPort ( theDialog );

    GetDialogItem ( theDialog, kStaticTextItemID, &theType, &theHan, &theRect );

    SetDialogItemText ( theHan, theText );

    ShowWindow ( theDialog );

    DrawDialog ( theDialog );

    bCancelled = (*theOperation) ( refCon, theDialog );

    DisposeDialog ( theDialog );

    SetPort ( savePort );

    return theErr;

} // ProgressOperation

Boolean UpdateProgressBar ( DialogRef theDialog, int doneAmount, int maxAmount )

{

    Boolean         bCancelled = false;

    OSErr           theErr = noErr;

    EventRecord     theEvent;

    if ( WaitNextEvent ( everyEvent - diskMask, &theEvent, kSleepTime, nil ) )

    {

        if ( IsDialogEvent ( &theEvent ) )

        {

            SInt16      itemHit;

            DialogRef   whichDialog;

            if ( DialogSelect ( &theEvent, &whichDialog, &itemHit ) )

            {

                if ( whichDialog == theDialog && itemHit == kCancelItemID )

                    bCancelled = true;

            }

        }

        else if ( theEvent.what == mouseDown )

        {

            WindowRef   theWindow;

            if ( FindWindow ( theEvent.where, &theWindow ) == inDrag )

                DoDragWindow ( theWindow, &theEvent );

        }

    }

    DrawProgressBar ( theDialog, doneAmount, maxAmount );

    return bCancelled;

} // UpdateProgressBar

static void DrawProgressBar ( DialogRef theDialog, int doneAmount, int maxAmount )

{

    SInt16          theType;

    int             theLength;

    float           floatDone, floatMax, thePercent;

    Handle          theHan;

    Rect            theRect;

    GetDialogItem ( theDialog, kUserItemID, &theType, &theHan, &theRect );

    if ( maxAmount )        // Standard Progress Bar

    {

        SetDialogItem ( theDialog, kUserItemID, theType, (Handle) gOutlineUserItemUPP, &theRect );

        // call it now, so that after an update event the boarder

        // is drawn before FillRect is called

        CallUserItemProc ( gOutlineUserItemUPP, theDialog, kUserItemID );

        theLength = theRect.right - theRect.left;

        floatDone = doneAmount;

        floatMax = maxAmount;

        thePercent = (floatDone / floatMax) * 100;

        theRect.right = theRect.left + ((thePercent / 100) * theLength);

        FillRect ( &theRect, &qd.black );

    }

    else                    // Barber Pole Progress Bar

    {

        static SInt16   theID = 1000;

        PicHandle       thePic;

        thePic = GetPicture ( theID++ );

        DrawPicture ( thePic, &theRect );

        if ( theID > 1003 )

            theID = 1000;

    }

    return;

} // DrawProgressBar

//

// This routine is one of the operations carried out

// which the progress bar is representing.

//

Boolean StandardDemoOperation ( void* refCon, DialogRef theDialog )

{

    #pragma unused(refCon)

    Boolean     bWasCancelled = false;

    int         i;

    const int   max = 100;

    for ( i = 1; i <= max && bWasCancelled == false; i++ )

    {

        UInt32  theDelay = 10L;

        Delay ( theDelay, &theDelay );

        bWasCancelled = UpdateProgressBar ( theDialog, i, max );

    }

    return bWasCancelled;

}

//

// This routine is one of the operations carried out

// which the progress bar is representing.

//

Boolean BarberPoleDemoOperation ( void* refCon, DialogRef theDialog )

{

    #pragma unused(refCon)

    Boolean     bWasCancelled = false;

    int         i;

    const int   max = 100;

    for ( i = 1; i <= max && bWasCancelled == false; i++ )

    {

        UInt32  theDelay = 10L;

        Delay ( theDelay, &theDelay );

        bWasCancelled = UpdateProgressBar ( theDialog, 0, 0 );

    }

    return bWasCancelled;

}