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SSKInteractionHandler.m
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SSKInteractionHandler.m
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#import "SSKInteractionHandler.h"
typedef enum : NSUInteger {
SSKInteractionHandlerEventStarted,
SSKInteractionHandlerEventCancelled,
SSKInteractionHandlerEventEnded
} SSKInteractionHandlerEvent;
#if !TARGET_OS_IPHONE
static BOOL SSKEventModifierFlagsContainNewKeyDown(NSUInteger newFlags, NSUInteger lastFlags, NSUInteger keyMask)
{
if (newFlags & keyMask) {
if (!(lastFlags & keyMask)) {
return YES;
}
}
return NO;
}
static BOOL SSKEventModifierFlagsContainNewKeyUp(NSUInteger newFlags, NSUInteger lastFlags, NSUInteger keyMask)
{
if (lastFlags & keyMask) {
if (!(newFlags & keyMask)) {
return YES;
}
}
return NO;
}
#endif
#pragma mark - SSKInteractionView interface
#if TARGET_OS_IPHONE
@interface SSKInteractionView : UIView
#else
@interface SSKInteractionView : NSView
#endif
@property (nonatomic, weak) SSKInteractionHandler *interactionHandler;
@property (nonatomic, strong, readonly) SKScene *scene;
@property (nonatomic) NSUInteger eventModifierFlags;
- (instancetype)initWithFrame:(CGRect)frame interactionHandler:(SSKInteractionHandler *)interactionHandler;
@end
#pragma mark - SSKInteractionHandler implementation
@interface SSKInteractionHandler()
@property (nonatomic, strong, readonly) SKView *view;
@property (nonatomic, strong) SSKInteractionView *interactionView;
@property (nonatomic, strong) NSHashTable *currentInteractionNodes;
@end
@implementation SSKInteractionHandler
- (id)init
{
if (!(self = [super init])) {
return nil;
}
_currentInteractionNodes = [NSHashTable hashTableWithOptions:NSPointerFunctionsWeakMemory];
return self;
}
- (void)didMoveToView:(SKView *)view
{
self.interactionView = [[SSKInteractionView alloc] initWithFrame:view.bounds interactionHandler:self];
[view addSubview:self.interactionView];
}
- (void)didMoveFromView:(SKView *)view
{
if (self.interactionView.superview != view) {
return;
}
[self.interactionView removeFromSuperview];
self.interactionView = nil;
}
- (SKView *)view
{
return (SKView *)self.interactionView.superview;
}
- (void)handlePointInteractionEvent:(SSKInteractionHandlerEvent)event type:(SSKInteractionType)type point:(CGPoint)point
{
switch (event) {
case SSKInteractionHandlerEventStarted: {
if ([self.view.scene conformsToProtocol:@protocol(SSKInteractiveNode)]) {
if ([self.view.scene respondsToSelector:@selector(pointInteractionWithType:startedAtPoint:)]) {
[(SKScene<SSKInteractiveNode> *)self.view.scene pointInteractionWithType:type startedAtPoint:point];
}
}
[self forEachInteractiveNodeAtPoint:point
thatRespondsToSelector:@selector(pointInteractionWithType:startedAtPoint:)
runBlock:^(SKNode<SSKInteractiveNode> *node) {
[self.currentInteractionNodes addObject:node];
CGPoint nodePoint = [node convertPoint:point fromNode:self.view.scene];
[node pointInteractionWithType:type startedAtPoint:nodePoint];
}];
}
break;
case SSKInteractionHandlerEventCancelled:
if ([self.view.scene conformsToProtocol:@protocol(SSKInteractiveNode)]) {
if ([self.view.scene respondsToSelector:@selector(pointInteractionCancelled)]) {
[(SKScene<SSKInteractiveNode> *)self.view.scene pointInteractionCancelled];
}
}
[self pointInteractionCancelledOrEnded];
break;
case SSKInteractionHandlerEventEnded: {
if ([self.view.scene conformsToProtocol:@protocol(SSKInteractiveNode)]) {
if ([self.view.scene respondsToSelector:@selector(pointInteractionWithType:endedAtPoint:)]) {
[(SKScene<SSKInteractiveNode> *)self.view.scene pointInteractionWithType:type endedAtPoint:point];
}
}
[self forEachInteractiveNodeAtPoint:point
thatRespondsToSelector:@selector(pointInteractionWithType:endedAtPoint:)
runBlock:^(SKNode<SSKInteractiveNode> *node) {
[self.currentInteractionNodes removeObject:node];
CGPoint nodePoint = [node convertPoint:point fromNode:self.view.scene];
[node pointInteractionWithType:type endedAtPoint:nodePoint];
}];
[self pointInteractionCancelledOrEnded];
}
break;
}
}
- (void)pointInteractionCancelledOrEnded
{
for (SKNode<SSKInteractiveNode> *node in self.currentInteractionNodes) {
if ([node respondsToSelector:@selector(pointInteractionCancelled)]) {
[node pointInteractionCancelled];
}
}
[self.currentInteractionNodes removeAllObjects];
}
- (void)handlePointerMovedEventAtPoint:(CGPoint)point
{
if ([self.view.scene conformsToProtocol:@protocol(SSKInteractiveNode)]) {
if ([self.view.scene respondsToSelector:@selector(pointerMovedInteractionAtPoint:)]) {
[(SKScene<SSKInteractiveNode> *)self.view.scene pointerMovedInteractionAtPoint:point];
}
}
[self forEachInteractiveNodeAtPoint:point
thatRespondsToSelector:@selector(pointerMovedInteractionAtPoint:)
runBlock:^(SKNode<SSKInteractiveNode> *node) {
CGPoint nodePoint = [node convertPoint:point fromNode:self.view.scene];
[node pointerMovedInteractionAtPoint:nodePoint];
}];
}
- (void)handleDragInteractionWithType:(SSKInteractionType)type point:(CGPoint)point velocity:(CGVector)velocity
{
if ([self.view.scene conformsToProtocol:@protocol(SSKInteractiveNode)]) {
if ([self.view.scene respondsToSelector:@selector(dragInteractionWithType:atPoint:velocity:)]) {
[(SKScene<SSKInteractiveNode> *)self.view.scene dragInteractionWithType:type
atPoint:point
velocity:velocity];
}
}
[self forEachInteractiveNodeAtPoint:point
thatRespondsToSelector:@selector(dragInteractionWithType:atPoint:velocity:)
runBlock:^(SKNode<SSKInteractiveNode> *node) {
CGPoint nodePoint = [node convertPoint:point fromNode:self.view.scene];
[node dragInteractionWithType:type atPoint:nodePoint velocity:velocity];
}];
}
- (void)forEachInteractiveNodeAtPoint:(CGPoint)point thatRespondsToSelector:(SEL)selector runBlock:(void(^)(SKNode<SSKInteractiveNode> *node))block
{
NSAssert(block, @"A block must be supplied");
NSArray *nodesAtPoint = [self.view.scene nodesAtPoint:point];
for (SKNode *node in nodesAtPoint) {
if (![node conformsToProtocol:@protocol(SSKInteractiveNode)]) {
continue;
}
if ([node respondsToSelector:selector]) {
block((SKNode<SSKInteractiveNode> *)node);
}
}
}
- (void)handleKeyboardEvent:(SSKInteractionHandlerEvent)event keyCode:(unsigned short)keyCode
{
if (![self.view.scene conformsToProtocol:@protocol(SSKInteractiveScene)]) {
return;
}
SKScene<SSKInteractiveScene> *interactiveScene = (SKScene<SSKInteractiveScene> *)self.view.scene;
switch (event) {
case SSKInteractionHandlerEventStarted:
if ([interactiveScene respondsToSelector:@selector(keyboardKeyPressed:)]) {
[interactiveScene keyboardKeyPressed:keyCode];
}
break;
case SSKInteractionHandlerEventEnded:
if ([interactiveScene respondsToSelector:@selector(keyboardKeyReleased:)]) {
[interactiveScene keyboardKeyReleased:keyCode];
}
break;
case SSKInteractionHandlerEventCancelled:
break;
}
}
- (void)handleKeyboardEvent:(SSKInteractionHandlerEvent)event specialKey:(SSKSpecialKey)specialKey
{
if (![self.view.scene conformsToProtocol:@protocol(SSKInteractiveScene)]) {
return;
}
SKScene<SSKInteractiveScene> *interactiveScene = (SKScene<SSKInteractiveScene> *)self.view.scene;
switch (event) {
case SSKInteractionHandlerEventStarted:
if ([interactiveScene respondsToSelector:@selector(keyboardSpecialKeyPressed:)]) {
[interactiveScene keyboardSpecialKeyPressed:specialKey];
}
break;
case SSKInteractionHandlerEventEnded:
if ([interactiveScene respondsToSelector:@selector(keyboardSpecialKeyReleased:)]) {
[interactiveScene keyboardSpecialKeyReleased:specialKey];
}
break;
case SSKInteractionHandlerEventCancelled:
break;
}
}
@end
#pragma mark - SSKInteractionView implementation
@implementation SSKInteractionView
- (instancetype)initWithFrame:(CGRect)frame interactionHandler:(SSKInteractionHandler *)interactionHandler
{
if (!(self = [super initWithFrame:frame])) {
return nil;
}
_interactionHandler = interactionHandler;
return self;
}
- (SKScene *)scene
{
return self.interactionHandler.view.scene;
}
#if TARGET_OS_IPHONE
#pragma mark - Touch handling
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
for (UITouch *touch in touches) {
[self.interactionHandler handlePointInteractionEvent:SSKInteractionHandlerEventStarted
type:SSKInteractionTypePrimary
point:[touch locationInNode:self.scene]];
}
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
for (UITouch *touch in touches) {
CGPoint point = [touch locationInNode:self.scene];
CGPoint previousPoint = [touch previousLocationInNode:self.scene];
CGVector velocity;
velocity.dx = point.x - previousPoint.x;
velocity.dy = point.y - previousPoint.y;
[self.interactionHandler handleDragInteractionWithType:SSKInteractionTypePrimary
point:point
velocity:velocity];
}
}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
for (UITouch *touch in touches) {
[self.interactionHandler handlePointInteractionEvent:SSKInteractionHandlerEventCancelled
type:SSKInteractionTypePrimary
point:[touch locationInNode:self.scene]];
}
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
for (UITouch *touch in touches) {
[self.interactionHandler handlePointInteractionEvent:SSKInteractionHandlerEventEnded
type:SSKInteractionTypePrimary
point:[touch locationInNode:self.scene]];
}
}
#else
#pragma mark - Mouse handling
- (void)mouseDown:(NSEvent *)event
{
[self.window makeFirstResponder:self];
[self.interactionHandler handlePointInteractionEvent:SSKInteractionHandlerEventStarted
type:SSKInteractionTypePrimary
point:[event locationInNode:self.scene]];
}
- (void)rightMouseDown:(NSEvent *)event
{
[self.window makeFirstResponder:self];
[self.interactionHandler handlePointInteractionEvent:SSKInteractionHandlerEventStarted
type:SSKInteractionTypeSecondary
point:[event locationInNode:self.scene]];
}
- (void)mouseDragged:(NSEvent *)event
{
CGVector velocity;
velocity.dx = event.deltaX;
velocity.dy = -event.deltaY;
[self.interactionHandler handleDragInteractionWithType:SSKInteractionTypePrimary
point:[event locationInNode:self.scene]
velocity:velocity];
}
- (void)rightMouseDragged:(NSEvent *)event
{
CGVector velocity;
velocity.dx = event.deltaX;
velocity.dy = -event.deltaY;
[self.interactionHandler handleDragInteractionWithType:SSKInteractionTypeSecondary
point:[event locationInNode:self.scene]
velocity:velocity];
}
- (void)mouseUp:(NSEvent *)event
{
[self.interactionHandler handlePointInteractionEvent:SSKInteractionHandlerEventEnded
type:SSKInteractionTypePrimary
point:[event locationInNode:self.scene]];
}
- (void)rightMouseUp:(NSEvent *)event
{
[self.interactionHandler handlePointInteractionEvent:SSKInteractionHandlerEventEnded
type:SSKInteractionTypeSecondary
point:[event locationInNode:self.scene]];
}
- (void)mouseMoved:(NSEvent *)event
{
[self.interactionHandler handlePointerMovedEventAtPoint:[event locationInNode:self.scene]];
}
#pragma mark - Keyboard handling
- (void)keyDown:(NSEvent *)event
{
[self.interactionHandler handleKeyboardEvent:SSKInteractionHandlerEventStarted
keyCode:[event keyCode]];
}
- (void)keyUp:(NSEvent *)event
{
[self.interactionHandler handleKeyboardEvent:SSKInteractionHandlerEventEnded
keyCode:[event keyCode]];
}
- (void)flagsChanged:(NSEvent *)event
{
self.eventModifierFlags = [event modifierFlags];
}
- (void)setEventModifierFlags:(NSUInteger)eventModifierFlags
{
if (_eventModifierFlags == eventModifierFlags) {
return;
}
NSArray *specialKeyMasks = @[
@(NSShiftKeyMask),
@(NSControlKeyMask),
@(NSAlternateKeyMask),
@(NSCommandKeyMask),
@(NSFunctionKeyMask)
];
for (NSNumber *encodedSpecialKeyMask in specialKeyMasks) {
NSUInteger specialKeyMask = [encodedSpecialKeyMask unsignedIntegerValue];
SSKSpecialKey specialKey = 0;
switch (specialKeyMask) {
case NSShiftKeyMask:
specialKey = SSKSpecialKeyShift;
break;
case NSControlKeyMask:
specialKey = SSKSpecialKeyControl;
break;
case NSAlternateKeyMask:
specialKey = SSKSpecialKeyAlt;
break;
case NSCommandKeyMask:
specialKey = SSKSpecialKeyCommand;
break;
case NSFunctionKeyMask:
specialKey = SSKSpecialKeyFn;
break;
}
if (SSKEventModifierFlagsContainNewKeyDown(eventModifierFlags, _eventModifierFlags, specialKeyMask)) {
[self.interactionHandler handleKeyboardEvent:SSKInteractionHandlerEventStarted
specialKey:specialKey];
} else if (SSKEventModifierFlagsContainNewKeyUp(eventModifierFlags, _eventModifierFlags, specialKeyMask)) {
[self.interactionHandler handleKeyboardEvent:SSKInteractionHandlerEventEnded
specialKey:specialKey];
}
}
_eventModifierFlags = eventModifierFlags;
}
#endif
@end
#pragma mark - SKView+SSKInteractionHandler
@implementation SKView (SSKInteractionHandler)
- (void)ssk_addInteractionHandler:(SSKInteractionHandler *)interactionHandler
{
[interactionHandler didMoveToView:self];
}
- (void)ssk_removeInteractionHandler:(SSKInteractionHandler *)interactionHandler
{
[interactionHandler didMoveFromView:self];
}
@end