DrawPatternLockView.m

//
//  DrawPatternLockView.m
//  AndroidLock
//
//  Created by Purnama Santo on 11/2/11.
//  Copyright (c) 2011 __MyCompanyName__. All rights reserved.
//

#import "DrawPatternLockView.h"

@implementation DrawPatternLockView


- (id)initWithFrame:(CGRect)frame
{
  self = [super initWithFrame:frame];
  if (self) {
    // Initialization code
  }

  return self;
}

// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{  
  if (!_trackPointValue)
    return;

  CGContextRef context = UIGraphicsGetCurrentContext();
  CGContextSetLineWidth(context, 10.0);
  CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceRGB();
  CGFloat components[] = {0.5, 0.5, 0.5, 0.8};
  CGColorRef color = CGColorCreate(colorspace, components);
  CGContextSetStrokeColorWithColor(context, color);

  CGPoint from;
  UIView *lastDot;
  for (UIView *dotView in _dotViews) {
    from = dotView.center;
    //nslog(@"drwaing dotview: %@", dotView);
    //nslog(@"\tdrawing from: %f, %f", from.x, from.y);
      
//      //nslog(@"%g,%g", dotView.frame.origin.x, dotView.frame.origin.y);
      if(from.y < 3)
          continue;
      
    if (!lastDot)
      CGContextMoveToPoint(context, from.x, from.y);
    else
      CGContextAddLineToPoint(context, from.x, from.y);
    
    lastDot = dotView;
  }

  CGPoint pt = [_trackPointValue CGPointValue];
    
    //if(pt.x < 300 && pt.y < 420 && pt.y > 150)
    //{
        CGContextAddLineToPoint(context, pt.x, pt.y);
    //}
  //nslog(@"\t to: %f, %f", pt.x, pt.y);
  
  
  CGContextStrokePath(context);
  CGColorSpaceRelease(colorspace);
  CGColorRelease(color);

  _trackPointValue = nil;
}


- (void)clearDotViews {
  [_dotViews removeAllObjects];
}


- (void)addDotView:(UIView *)view {
  if (!_dotViews)
    _dotViews = [NSMutableArray array];

  [_dotViews addObject:view];
}


- (void)drawLineFromLastDotTo:(CGPoint)pt {
  _trackPointValue = [NSValue valueWithCGPoint:pt];
  [self setNeedsDisplay];
}


@end