Developer CD Series 2000 August: Tool Chest/Dev.CD Aug 00 TC Disk 2.toast/pc/sample code/human interface toolbox/progressbars/nonthreadedprogress.c

C/C++ Source or Header | 2000-06-23 | 4.6 KB | 224 lines

/*
    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;
}