/*

     File: RemainingHelicopters.m

 Abstract: Subclass of NSView for displaying the number of helicopters left

  Version: 1.0

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 */

#import "RemainingHelicopters.h"

@implementation RemainingHelicopters

- (void)drawRect:(NSRect)r {

    NSRect bounds = [self bounds];

    NSInteger helicoptersToDisplay = remainingHelicopters;

    if (helicoptersToDisplay < 3) helicoptersToDisplay = 3;

    CGFloat inc;

    NSInteger cnt;

    NSPoint point = NSZeroPoint;

    NSImage *helicopters = [NSImage imageNamed:@"helicopter"];

    NSRect rect = NSMakeRect(0.0, 0.0, [helicopters size].width, [helicopters size].height / 4);

    point.x = floor((bounds.size.width - rect.size.width) / 2.0);

    if (helicoptersToDisplay * rect.size.height >= bounds.size.height) {

        inc = (bounds.size.height - helicoptersToDisplay * rect.size.height) / (helicoptersToDisplay - 1);

    } else {

        inc = (bounds.size.height - helicoptersToDisplay * rect.size.height) / (helicoptersToDisplay + 1);

    }

    point.y = floor(NSMaxY(bounds) - rect.size.height - ((inc < 0) ? 0 : inc));

    for (cnt = helicoptersToDisplay; cnt > 0; cnt--) {

    [helicopters dissolveToPoint:point fromRect:rect fraction:(cnt > remainingHelicopters) ? 0.2 : 1.0];

        point.y = point.y - (rect.size.height + inc);

    }

}

- (void)setIntegerValue:(NSInteger)val {

    remainingHelicopters = val - 1;

    [self setNeedsDisplay:YES];

}

- (NSInteger)integerValue {

    return remainingHelicopters + 1;

}

@end