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A simple swipe event extension for Sparrow
//
// SHSwipeEvent.h
// Sparrow
//
// Created by Shilo White on 3/10/11.
// Copyright 2011 Shilocity Productions. All rights reserved.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the Simplified BSD License.
//
#define SH_EVENT_TYPE_SWIPE @"swipe"
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
#import "SPEvent.h"
#import "SPStage.h"
@class SPPoint;
@class SPDisplayObject;
typedef enum {
SHSwipeDirectionRight = UISwipeGestureRecognizerDirectionRight,
SHSwipeDirectionLeft = UISwipeGestureRecognizerDirectionLeft,
SHSwipeDirectionUp = UISwipeGestureRecognizerDirectionUp,
SHSwipeDirectionDown = UISwipeGestureRecognizerDirectionDown
} SHSwipeDirection;
@interface SHSwipeEvent : SPEvent {
SPPoint *mLocation;
SHSwipeDirection mDirection;
}
@property (nonatomic, readonly) SPPoint *location;
@property (nonatomic, readonly) SHSwipeDirection direction;
- (id)initWithType:(NSString *)type location:(SPPoint *)location direction:(SHSwipeDirection)direction;
- (id)initWithType:(NSString *)type location:(SPPoint *)location direction:(SHSwipeDirection)direction bubbles:(BOOL)bubbles;
+ (SHSwipeEvent *)eventWithType:(NSString *)type location:(SPPoint *)location direction:(SHSwipeDirection)direction;
+ (SHSwipeEvent *)eventWithType:(NSString *)type location:(SPPoint *)location direction:(SHSwipeDirection)direction bubbles:(BOOL)bubbles;
- (SPPoint *)locationInSpace:(SPDisplayObject *)space;
- (SHSwipeDirection)directionInSpace:(SPDisplayObject *)space;
@end
@interface SPStage (swipe)
- (void)startSwipeRecognizer;
- (void)stopSwipeRecognizer;
@end
//
// SHSwipeEvent.m
// Sparrow
//
// Created by Shilo White on 3/10/11.
// Copyright 2011 Shilocity Productions. All rights reserved.
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the Simplified BSD License.
//
#define SH_EXC_NATIVEVIEW_NIL @"NativeViewDoesNotExist"
#define PI 3.14159265359f
#define SP_R2D(rad) ((rad) / PI * 180.0f)
#import "SHSwipeEvent.h"
#import "SPPoint.h"
#import "SPDisplayObject.h"
#import "SPMatrix.h"
@implementation SHSwipeEvent
@synthesize location = mLocation;
@synthesize direction = mDirection;
- (id)initWithType:(NSString *)type location:(SPPoint *)location direction:(SHSwipeDirection)direction {
return [self initWithType:type location:location direction:direction bubbles:YES];
}
- (id)initWithType:(NSString *)type location:(SPPoint *)location direction:(SHSwipeDirection)direction bubbles:(BOOL)bubbles {
if (self = [super initWithType:type bubbles:bubbles]) {
mLocation = location;
mDirection = direction;
}
return self;
}
+ (SHSwipeEvent *)eventWithType:(NSString *)type location:(SPPoint *)location direction:(SHSwipeDirection)direction {
return [[[SHSwipeEvent alloc] initWithType:type location:location direction:direction bubbles:YES] autorelease];
}
+ (SHSwipeEvent *)eventWithType:(NSString *)type location:(SPPoint *)location direction:(SHSwipeDirection)direction bubbles:(BOOL)bubbles {
return [[[SHSwipeEvent alloc] initWithType:type location:location direction:direction bubbles:bubbles] autorelease];
}
- (SPPoint *)locationInSpace:(SPDisplayObject *)space {
SPDisplayObject *mTarget = (SPDisplayObject *)self.target;
SPPoint *point = [SPPoint pointWithX:mLocation.x y:mLocation.y];
SPMatrix *transformationMatrix = [mTarget.root transformationMatrixToSpace:space];
return [transformationMatrix transformPoint:point];
}
- (SHSwipeDirection)directionInSpace:(SPDisplayObject *)space {
float swipeAngle;
if (mDirection == SHSwipeDirectionUp) {
swipeAngle = 0;
} else if (mDirection == SHSwipeDirectionDown) {
swipeAngle = 180.0f;
} else if (mDirection == SHSwipeDirectionLeft) {
swipeAngle = 270.0f;
} else if (mDirection == SHSwipeDirectionRight) {
swipeAngle = 90.0f;
}
float spaceRotation = 0;
while (space.parent) {
spaceRotation += space.rotation;
space = space.parent;
}
spaceRotation = SP_R2D(spaceRotation);
swipeAngle -= spaceRotation;
if (swipeAngle < 0) swipeAngle += 360;
if ((swipeAngle >= 315 && swipeAngle <= 360) || (swipeAngle >= 0 && swipeAngle < 45)) {
return SHSwipeDirectionUp;
} else if (swipeAngle >= 45 && swipeAngle < 135) {
return SHSwipeDirectionRight;
} else if (swipeAngle >= 135 && swipeAngle < 225) {
return SHSwipeDirectionDown;
} else {
return SHSwipeDirectionLeft;
}
}
@end
@implementation SPStage (swipe)
static UISwipeGestureRecognizer *mUpSwipeRecognizer;
static UISwipeGestureRecognizer *mDownSwipeRecognizer;
static UISwipeGestureRecognizer *mLeftSwipeRecognizer;
static UISwipeGestureRecognizer *mRightSwipeRecognizer;
- (void)startSwipeRecognizer {
UIView *nativeView = self.nativeView;
if (!nativeView) [NSException raise:SH_EXC_NATIVEVIEW_NIL format:@"nativeView not linked to stage yet.", NSStringFromSelector(_cmd)];
if (mUpSwipeRecognizer) return;
mUpSwipeRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(onSwipeUp:)];
mUpSwipeRecognizer.direction = UISwipeGestureRecognizerDirectionUp;
mUpSwipeRecognizer.cancelsTouchesInView = NO;
mUpSwipeRecognizer.delaysTouchesBegan = NO;
mUpSwipeRecognizer.delaysTouchesEnded = NO;
mDownSwipeRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(onSwipeDown:)];
mDownSwipeRecognizer.direction = UISwipeGestureRecognizerDirectionDown;
mDownSwipeRecognizer.cancelsTouchesInView = NO;
mDownSwipeRecognizer.delaysTouchesBegan = NO;
mDownSwipeRecognizer.delaysTouchesEnded = NO;
mLeftSwipeRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(onSwipeLeft:)];
mLeftSwipeRecognizer.direction = UISwipeGestureRecognizerDirectionLeft;
mLeftSwipeRecognizer.cancelsTouchesInView = NO;
mLeftSwipeRecognizer.delaysTouchesBegan = NO;
mLeftSwipeRecognizer.delaysTouchesEnded = NO;
mRightSwipeRecognizer = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(onSwipeRight:)];
mRightSwipeRecognizer.direction = UISwipeGestureRecognizerDirectionRight;
mRightSwipeRecognizer.cancelsTouchesInView = NO;
mRightSwipeRecognizer.delaysTouchesBegan = NO;
mRightSwipeRecognizer.delaysTouchesEnded = NO;
[nativeView addGestureRecognizer:mUpSwipeRecognizer];
[nativeView addGestureRecognizer:mDownSwipeRecognizer];
[nativeView addGestureRecognizer:mLeftSwipeRecognizer];
[nativeView addGestureRecognizer:mRightSwipeRecognizer];
[mUpSwipeRecognizer release];
[mDownSwipeRecognizer release];
[mLeftSwipeRecognizer release];
[mRightSwipeRecognizer release];
}
- (void)stopSwipeRecognizer {
UIView *nativeView = self.nativeView;
if (!nativeView) [NSException raise:SH_EXC_NATIVEVIEW_NIL format:@"nativeView not linked to stage yet.", NSStringFromSelector(_cmd)];
[nativeView removeGestureRecognizer:mUpSwipeRecognizer];
[nativeView removeGestureRecognizer:mDownSwipeRecognizer];
[nativeView removeGestureRecognizer:mLeftSwipeRecognizer];
[nativeView removeGestureRecognizer:mRightSwipeRecognizer];
mUpSwipeRecognizer = mDownSwipeRecognizer = mLeftSwipeRecognizer = mRightSwipeRecognizer = nil;
}
- (void)onSwipeUp:(UISwipeGestureRecognizer *)upSwipeRecognizer {
CGPoint location = [upSwipeRecognizer locationInView:self.nativeView];
SHSwipeDirection direction = (SHSwipeDirection)upSwipeRecognizer.direction;
SHSwipeEvent *event = [[SHSwipeEvent alloc] initWithType:SH_EVENT_TYPE_SWIPE location:[SPPoint pointWithX:location.x y:location.y] direction:direction];
[[self hitTestPoint:location forTouch:YES] dispatchEvent:event];
[event release];
}
- (void)onSwipeDown:(UISwipeGestureRecognizer *)downSwipeRecognizer {
CGPoint location = [downSwipeRecognizer locationInView:self.nativeView];
SHSwipeDirection direction = (SHSwipeDirection)downSwipeRecognizer.direction;
SHSwipeEvent *event = [[SHSwipeEvent alloc] initWithType:SH_EVENT_TYPE_SWIPE location:[SPPoint pointWithX:location.x y:location.y] direction:direction];
[[self hitTestPoint:location forTouch:YES] dispatchEvent:event];
[event release];
}
- (void)onSwipeLeft:(UISwipeGestureRecognizer *)leftSwipeRecognizer {
CGPoint location = [leftSwipeRecognizer locationInView:self.nativeView];
SHSwipeDirection direction = (SHSwipeDirection)leftSwipeRecognizer.direction;
SHSwipeEvent *event = [[SHSwipeEvent alloc] initWithType:SH_EVENT_TYPE_SWIPE location:[SPPoint pointWithX:location.x y:location.y] direction:direction];
[[self hitTestPoint:location forTouch:YES] dispatchEvent:event];
[event release];
}
- (void)onSwipeRight:(UISwipeGestureRecognizer *)rightSwipeRecognizer {
CGPoint location = [rightSwipeRecognizer locationInView:self.nativeView];
SHSwipeDirection direction = (SHSwipeDirection)rightSwipeRecognizer.direction;
SHSwipeEvent *event = [[SHSwipeEvent alloc] initWithType:SH_EVENT_TYPE_SWIPE location:[SPPoint pointWithX:location.x y:location.y] direction:direction];
[[self hitTestPoint:location forTouch:YES] dispatchEvent:event];
[event release];
}
@end
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