Extended UIPanGestureRecognizer

SimpleUIPanGestureRecognizer.h

//
//  SimpleUIPanGestureRecognizer.h
//  Playback
//
//  Created by KS on 4/1/14.
//  Copyright (c) 2014 ks. All rights reserved.
//



#import <UIKit/UIKit.h>
#import <UIKit/UIGestureRecognizerSubclass.h> 



@interface SimpleUIPanGestureRecognizer : UIPanGestureRecognizer
{
    CGPoint         fullDistance;
    CGPoint         startPoint;
    CGPoint         moveDifference;
    CGPoint         movePoint;
} 


// UIGestureRecognizerSubclass Methods
- (void) reset;
- (void) touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
- (void) touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event;
- (void) touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event;
- (void) touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event;


// Getters
- (CGPoint) totalDistance;
- (CGPoint) distanceMoved;
- (CGPoint) getStartPoint;


@end

SimpleUIPanGestureRecognizer.m

//
//  SimpleUIPanGestureRecognizer.m
//  Playback
//
//  Created by KS on 4/1/14.
//  Copyright (c) 2014 ks. All rights reserved.
//



#import "SimpleUIPanGestureRecognizer.h"



@implementation SimpleUIPanGestureRecognizer



#pragma mark - UIGestureRecognizerSubclass Methods

- (void)reset
    {
        // Reset Points
        startPoint = CGPointMake( 0 , 0 );
        moveDifference = CGPointMake( 0 , 0 );
        movePoint = CGPointMake( 0 , 0 );
        
        [super reset ];
    }

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event;
    {
        [super touchesBegan:touches withEvent:event ];
        
        // Save Start Point
        startPoint = [self locationInView:self.view ];
        movePoint = [self locationInView:self.view ];
        fullDistance = CGPointMake( 0 , 0 );
    }

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
    {
        [super touchesMoved:touches withEvent:event ];
        
        // Instantly Start Gesture
        [self setState:UIGestureRecognizerStateChanged ];
        
        // Save difference
        CGPoint newMovePoint = [self locationInView:self.view ];
        moveDifference = CGPointMake( newMovePoint.x - movePoint.x , newMovePoint.y - movePoint.y );
        
        // Save Move Point
        movePoint = newMovePoint;
        
        // Save total
        CGPointMake( movePoint.x - startPoint.x , movePoint.y - startPoint.y );
    }

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
    { [super touchesEnded:touches withEvent:event ]; }

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
    { [super touchesCancelled:touches withEvent:event ]; }



#pragma mark - Getters

- (CGPoint) distanceMoved
    { return moveDifference; }

- (CGPoint) getStartPoint
    { return startPoint; }

- (CGPoint) totalDistance
    { return fullDistance; }



@end