/*

 File: PongView.m

 Version: 1.0

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 */ 

/*************************************************************

/* The PongView class draws the background, paddles, and ball

/* typical of a pong court. Its setters are convenience

/* functions that handle calling -setNeedsDisplayInRect.

/* The PongView also handles tracking whether the up/down 

/* arrow keys are depressed.

/************************************************************/

#import "PongView.h"

@implementation PongView

-(BOOL)isOpaque

{

    return YES;

}

- (void)drawRect:(NSRect)rect

{

    const NSRect *rects;

    int count;

    int i;

    [self getRectsBeingDrawn:&rects count:&count];

    [[NSColor blackColor] setFill];

    for (i = 0; i < count; i++)

        [NSBezierPath fillRect:rects[i]];

    if ([self needsToDrawRect:_leftPaddleRect]) {

        [[NSColor whiteColor] setFill];

        [NSBezierPath fillRect:_leftPaddleRect];

    }

    if ([self needsToDrawRect:_rightPaddleRect]) {

        [[NSColor whiteColor] setFill];

        [NSBezierPath fillRect:_rightPaddleRect];

    }

    if ([self needsToDrawRect:_ballRect]) {

        [[NSColor whiteColor] setFill];

        [[NSBezierPath bezierPathWithOvalInRect:_ballRect] fill];

    }

}

- (NSRect)leftPaddleRect

{

    return _leftPaddleRect;

}

- (void)setLeftPaddleRect:(NSRect)value

{

    if (!NSEqualRects(_leftPaddleRect, value)) {

        [self setNeedsDisplayInRect:_leftPaddleRect];

        _leftPaddleRect = value;

        [self setNeedsDisplayInRect:_leftPaddleRect];

    }

}

- (NSRect)rightPaddleRect

{

    return _rightPaddleRect;

}

- (void)setRightPaddleRect:(NSRect)value

{

    if (!NSEqualRects(_rightPaddleRect, value)) {

        [self setNeedsDisplayInRect:_rightPaddleRect];

        _rightPaddleRect = value;

        [self setNeedsDisplayInRect:_rightPaddleRect];

    }

}

- (NSRect)ballRect

{

    return _ballRect;

}

- (void)setBallRect:(NSRect)value

{

    if (!NSEqualRects(_ballRect, value)) {

        [self setNeedsDisplayInRect:_ballRect];

        _ballRect = value;

        [self setNeedsDisplayInRect:_ballRect];

    }

}

/* Tracks which key is depressed. */

- (NSEvent *)lastKeyDownEvent

{

    return [[_lastKeyDownEvent retain] autorelease];

}

- (void)setLastKeyDownEvent:(NSEvent *)event

{

    if (_lastKeyDownEvent != event) {

        [_lastKeyDownEvent release];

        _lastKeyDownEvent = [event retain];

    }    

}

@end

@implementation PongView (NSResponder)

- (BOOL)acceptsFirstResponder

{

    return YES;

}

- (void)keyDown:(NSEvent *)event

{

    [self setLastKeyDownEvent:event];

}

- (void)keyUp:(NSEvent *)event

{

    if ([event keyCode] == [[self lastKeyDownEvent] keyCode])

        [self setLastKeyDownEvent:nil];

}

@end