Quick and dirty frames per second meter for sparrow

example usage

SXFPSMeter *meter = [[SXFPSMeter alloc] initWithText:@""];
[self addChild:meter];

SXFPSMeter

#import <Foundation/Foundation.h>
#import "Sparrow.h"

@interface SXFPSMeter : SPTextField{
}
- (void)update:(SPEnterFrameEvent*)event;

@end

SXFPSMeter.m

#import "SXFPSMeter.h"

@implementation SXFPSMeter

- (id)initWithText:(NSString *)text{
	self = [super initWithText:text];
	self.hAlign = SPHAlignLeft;
	self.vAlign = SPVAlignTop;
	self.fontSize = 16;
	self.color = 0xFF0000;
	[self addEventListener:@selector(update:) atObject:self forType:SP_EVENT_TYPE_ENTER_FRAME];
        self.touchable = NO;
	return self;
}

- (void)update:(SPEnterFrameEvent*)event{
	static int frameCount = 0;
	static double totalTime = 0;
	totalTime += event.passedTime;
	if (++frameCount % 60 == 0){
		self.text = [NSString stringWithFormat:@"FPS: %f", frameCount/totalTime];
		frameCount = totalTime = 0;
	}
}

- (void)dealloc{
	[self removeEventListener:@selector(update:) atObject:self forType:SP_EVENT_TYPE_ENTER_FRAME];
	[super dealloc];
}

@end

missing a
self.touchable=NO;

@kaala seems like a reasonable enough thing to add so I popped it in.