H E L L O, my name is...

C4WorkSpace.m

//
//  C4WorkSpace.m
//  test
//
//  Created by travis on 2013-05-28.
//  Copyright (c) 2013 Slant. All rights reserved.
//

#import "C4WorkSpace.h"

@implementation C4WorkSpace

-(void)setup {    
    C4Font *helloFont = [C4Font fontWithName:@"Avenir-Medium" size:120];
    C4Shape *hello = [C4Shape shapeFromString:@"H E L L O" withFont:helloFont];
    hello.lineWidth = 0.0f;
    hello.center = CGPointMake(self.canvas.center.x, hello.height);
    
    C4Font *nameFont = [C4Font fontWithName:@"Avenir-Light" size:60];
    C4Shape *myNameIs = [C4Shape shapeFromString:@"my name is" withFont:nameFont];
    myNameIs.lineWidth = 0.0f;
    myNameIs.center = CGPointMake(hello.center.x, hello.center.y + hello.height);
    
    self.canvas.multipleTouchEnabled = YES;
    
    [self.canvas addObjects:@[hello,myNameIs]];
}

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    UITouch *currentTouch = [touches anyObject];
    CGPoint currentPoint = [currentTouch locationInView:self.canvas];
    CGPoint previousPoint = [currentTouch previousLocationInView:self.canvas];
    NSInteger distance = (NSInteger)[C4Vector distanceBetweenA:currentPoint andB:previousPoint];
    
    if(distance > 2) {
        CGPoint linePoints[2] = {previousPoint, currentPoint};
        C4Shape *line = [C4Shape line:linePoints];
        line.lineWidth = 12;
        line.lineCap = CAPROUND;
        line.strokeColor = distance % 2 == 0 ? C4RED : C4BLUE;
        [self.canvas addShape:line];
    }
    event = event;
}

@end