/*

     File: PlaybackTime.m

 Abstract: Implementation file for the playback timer class in CocoaDVDPlayer, 

 an Apple Developer sample project.

  Version: 1.3

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 */ 

#import "PlaybackTime.h"

/*

********************************************************************************

**

**      Class: PlaybackTime

**

********************************************************************************

*/

/* This method is used inside this file only. Instead of declaring it in

PlaybackTime.h, we declare them here in a category that extends the class. */

@interface PlaybackTime (InternalMethods)

- (void) setTimeText;

@end

@implementation PlaybackTime

- (id) init

{

    if ((self = [super init]) != nil) {

        /* default is to display elapsed time */

        timeBase = kTimeBaseElapsed;

    }

    return self;

}

/* When the user clicks the mouse in the playback time field, this method

responds by toggling the time base between elapsed and remaining time. */

- (void) mouseDown: (NSEvent *)event

{

    if (timeBase == kTimeBaseElapsed) {

        timeBase = kTimeBaseRemaining;

    }

    else {

        timeBase = kTimeBaseElapsed;

    }

    [self setTimeText];

    [super mouseDown:event];

}

/* This method is used by the Controller object during playback to update the

elapsed and remaining time, in response to time events. */

- (void) setTimeElapsed: (NSInteger)inElapsed timeRemaining: (NSInteger)inRemaining

{ 

    timeElapsed = inElapsed;

    timeRemaining = inRemaining;

    [self setTimeText];

}

/* This method updates the text used to display the time in the control

window. */

- (void) setTimeText

{

    UInt32 time, hours, mins, secs;

    NSString *format;

    if (timeBase == kTimeBaseElapsed) {

        time = (timeElapsed + 500) / 1000;

        format = @"%02u:%02u:%02u";

    }

    else {

        time = (timeRemaining + 500) / 1000;

        format = @"-%02u:%02u:%02u";

    }

    hours = time / 3600;

    time -= hours * 3600;

    mins = time / 60;

    secs = time % 60;

    NSString *timeString = [[NSString alloc] initWithFormat:format, hours, mins, secs];

    [self setStringValue:timeString];

    [timeString release];

    [self setNeedsDisplay];

}

@end