//
//  RuledScrollView.m
//  SpectogramPrototype
//
//  Created by Joshua Moerman on 24/12/13.
//  Copyright (c) 2013 Joshua Moerman. All rights reserved.
//

#import "RuledScrollView.h"

@interface RuledScrollView () <UIScrollViewDelegate> {
	CGFloat rulerHeight;
	CGFloat rulerWidth;
}
- (void) initView;
- (void) placeTicks;
@end

@implementation RuledScrollView
@synthesize content, topRuler, leftRuler;

- (id)initWithFrame:(CGRect)frame{
	if(self = [super initWithFrame:frame]){
		[self initView];
	}
	return self;
}

- (id)initWithCoder:(NSCoder *)aDecoder{
	if(self = [super initWithCoder:aDecoder]){
		[self initView];
	}
	return self;
}

- (void)initView {
	rulerHeight = 44;
	rulerWidth = 120;
	
	self.delegate = self;
	self.backgroundColor = [UIColor whiteColor];
	
	content = [[UIView alloc] initWithFrame:self.frame];
	content.autoresizesSubviews = NO;
	[self addSubview:content];
	
	CGRect frame2 = self.frame;
	frame2.size.height = rulerHeight;
	topRuler = [[UIView alloc] initWithFrame:frame2];
	topRuler.layer.opacity = 0.5;
	topRuler.backgroundColor = self.backgroundColor;
	[self addSubview:topRuler];
	
	CGRect frame3 = self.frame;
	frame3.size.width = rulerWidth;
	leftRuler = [[UIView alloc] initWithFrame:frame3];
	leftRuler.layer.opacity = 0.5;
	leftRuler.backgroundColor = self.backgroundColor;
	[self addSubview:leftRuler];
}

/* we should draw the ticks in drawRect:
 [[UIColor blackColor] setFill];
 UIRectFill((CGRect){0,200,rect.size.width,1});
 
 and do tiling for the text
 */

- (void)placeTicks {
	[topRuler.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];
	for (CGFloat x = rulerWidth + 50; x < topRuler.frame.size.width; x += 100){
		UIView * line = [[UIView alloc] initWithFrame:CGRectMake(x, 0, 1, rulerHeight)];
		line.backgroundColor = [UIColor blackColor];
		[topRuler addSubview:line];
		
		CGFloat width = 100;
		UILabel * text = [[UILabel alloc] initWithFrame:CGRectMake(x - width/2, 0, width, rulerHeight)];
		text.text = [NSString stringWithFormat:@"%.0f", x];
		text.textAlignment = NSTextAlignmentCenter;
		[topRuler addSubview:text];
	}
}

- (void)layoutSubviews {
	{
		CGRect frame = self.topRuler.frame;
		frame.origin.y = self.contentOffset.y;
		self.topRuler.frame = frame;
		[self placeTicks];
	}
	{
		CGRect frame = self.leftRuler.frame;
		frame.origin.x = self.contentOffset.x;
		self.leftRuler.frame = frame;
	}
}

- (void)setContentSize:(CGSize)contentSize{
	[super setContentSize:CGSizeMake(contentSize.width + rulerWidth, contentSize.height + rulerHeight)];
	content.frame = CGRectMake(rulerWidth, rulerHeight, contentSize.width, contentSize.height);
	topRuler.frame = CGRectMake(0, 0, contentSize.width + rulerWidth, rulerHeight);
	leftRuler.frame = CGRectMake(0, 0, rulerWidth, contentSize.height + rulerHeight);
}

- (UIView *)viewForZoomingInScrollView:(UIScrollView *)scrollView{
	return content;
}

@end