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MSDynamicsDrawerViewController.m
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MSDynamicsDrawerViewController.m
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//
// MSDynamicsDrawerViewController.h
// MSDynamicsDrawerViewController
//
// Created by Eric Horacek on 9/4/12.
// Copyright (c) 2012-2013 Monospace Ltd. All rights reserved.
//
// This code is distributed under the terms and conditions of the MIT license.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.
//
#import <QuartzCore/QuartzCore.h>
#import "MSDynamicsDrawerViewController.h"
//#define DEBUG_LAYOUT
const CGFloat MSDynamicsDrawerDefaultOpenStateRevealWidthHorizontal = 267.0;
const CGFloat MSDynamicsDrawerDefaultOpenStateRevealWidthVertical = 300.0;
const CGFloat MSPaneViewVelocityThreshold = 5.0;
const CGFloat MSPaneViewVelocityMultiplier = 5.0;
const CGFloat MSPaneViewScreenEdgeThreshold = 24.0; // After testing Apple's `UIScreenEdgePanGestureRecognizer` this seems to be the closest value to create an equivalent effect.
NSString * const MSDynamicsDrawerBoundaryIdentifier = @"MSDynamicsDrawerBoundaryIdentifier";
typedef void (^ViewActionBlock)(UIView *view);
@interface UIView (ViewHierarchyAction)
- (void)superviewHierarchyAction:(ViewActionBlock)viewAction;
@end
@implementation UIView (ViewHierarchyAction)
- (void)superviewHierarchyAction:(ViewActionBlock)viewAction
{
viewAction(self);
[self.superview superviewHierarchyAction:viewAction];
}
@end
BOOL __attribute__((const)) MSDynamicsDrawerDirectionIsNonMasked(MSDynamicsDrawerDirection drawerDirection)
{
switch (drawerDirection) {
case MSDynamicsDrawerDirectionNone:
case MSDynamicsDrawerDirectionTop:
case MSDynamicsDrawerDirectionLeft:
case MSDynamicsDrawerDirectionBottom:
case MSDynamicsDrawerDirectionRight:
return YES;
default:
return NO;
}
}
BOOL __attribute__((const)) MSDynamicsDrawerDirectionIsCardinal(MSDynamicsDrawerDirection drawerDirection)
{
switch (drawerDirection) {
case MSDynamicsDrawerDirectionTop:
case MSDynamicsDrawerDirectionLeft:
case MSDynamicsDrawerDirectionBottom:
case MSDynamicsDrawerDirectionRight:
return YES;
default:
return NO;
}
}
BOOL __attribute__((const)) MSDynamicsDrawerDirectionIsValid(MSDynamicsDrawerDirection drawerDirection)
{
switch (drawerDirection) {
case MSDynamicsDrawerDirectionNone:
case MSDynamicsDrawerDirectionTop:
case MSDynamicsDrawerDirectionLeft:
case MSDynamicsDrawerDirectionBottom:
case MSDynamicsDrawerDirectionRight:
case MSDynamicsDrawerDirectionHorizontal:
case MSDynamicsDrawerDirectionVertical:
return YES;
default:
return NO;
}
}
void MSDynamicsDrawerDirectionActionForMaskedValues(NSInteger direction, MSDynamicsDrawerActionBlock action)
{
for (MSDynamicsDrawerDirection currentDirection = MSDynamicsDrawerDirectionTop; currentDirection <= MSDynamicsDrawerDirectionRight; currentDirection <<= 1) {
if (currentDirection & direction) {
action(currentDirection);
}
}
}
@interface MSDynamicsDrawerViewController () <UIGestureRecognizerDelegate, UIDynamicAnimatorDelegate>
// State
@property (nonatomic, assign) BOOL animatingRotation;
@property (nonatomic, assign) MSDynamicsDrawerDirection currentDrawerDirection;
@property (nonatomic, assign) MSDynamicsDrawerDirection possibleDrawerDirection;
@property (nonatomic, assign) MSDynamicsDrawerPaneState potentialPaneState;
// View Controller Container Views
@property (nonatomic, strong) UIView *drawerView;
@property (nonatomic, strong) UIView *paneView;
// Visible View Controllers
@property (nonatomic, strong) UIViewController *drawerViewController;
// Internal Properties
@property (nonatomic, strong) NSMutableDictionary *drawerViewControllers;
@property (nonatomic, strong) NSMutableDictionary *revealWidth;
@property (nonatomic, strong) NSMutableDictionary *paneDragRevealEnabled;
@property (nonatomic, strong) NSMutableDictionary *paneTapToCloseEnabled;
@property (nonatomic, strong) NSMutableDictionary *stylers;
// Gestures
@property (nonatomic, strong) NSMutableSet *touchForwardingClasses;
@property (nonatomic, strong) UIPanGestureRecognizer *panePanGestureRecognizer;
@property (nonatomic, strong) UITapGestureRecognizer *paneTapGestureRecognizer;
// Dynamics
@property (nonatomic, strong) UIDynamicAnimator *dynamicAnimator;
@property (nonatomic, strong) UIPushBehavior *panePushBehavior;
@property (nonatomic, strong) UIDynamicItemBehavior *paneElasticityBehavior;
@property (nonatomic, strong) UIGravityBehavior *paneGravityBehavior;
@property (nonatomic, strong) UICollisionBehavior *paneBoundaryCollisionBehavior;
@property (nonatomic, copy) void (^dynamicAnimatorCompletion)(void);
@end
@implementation MSDynamicsDrawerViewController
@synthesize currentDrawerDirection = _currentDrawerDirection;
@synthesize possibleDrawerDirection = _possibleDrawerDirection;
@synthesize paneState = _paneState;
@synthesize paneViewController = _paneViewController;
@synthesize drawerViewController = _drawerViewController;
#pragma mark - NSObject
- (instancetype)initWithCoder:(NSCoder *)aDecoder
{
if (self = [super initWithCoder:aDecoder]) {
[self initialize];
}
return self;
}
- (void)dealloc
{
[self.paneView removeObserver:self forKeyPath:NSStringFromSelector(@selector(frame))];
}
#pragma mark - UIViewController
- (instancetype)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
if (self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]) {
[self initialize];
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.drawerView.frame = self.view.bounds;
self.paneView.frame = self.view.bounds;
[self.view addSubview:self.drawerView];
[self.view addSubview:self.paneView];
self.dynamicAnimator = [[UIDynamicAnimator alloc] initWithReferenceView:self.view];
self.dynamicAnimator.delegate = self;
self.paneBoundaryCollisionBehavior = [[UICollisionBehavior alloc] initWithItems:@[self.paneView]];
self.paneGravityBehavior = [[UIGravityBehavior alloc] initWithItems:@[self.paneView]];
self.panePushBehavior = [[UIPushBehavior alloc] initWithItems:@[self.paneView] mode:UIPushBehaviorModeInstantaneous];
self.paneElasticityBehavior = [[UIDynamicItemBehavior alloc] initWithItems:@[self.paneView]];
__weak typeof(self) weakSelf = self;
self.paneGravityBehavior.action = ^{
[weakSelf didUpdateDynamicAnimatorAction];
};
}
- (void)willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration
{
self.animatingRotation = YES;
}
- (void)didRotateFromInterfaceOrientation:(UIInterfaceOrientation)fromInterfaceOrientation
{
self.animatingRotation = NO;
[self updateStylers];
}
- (BOOL)shouldAutorotate
{
// Do not allow rotation when not in resting state (dynamic animator is running or pane pan gesture recognizer is active)
return (!self.dynamicAnimator.isRunning && (self.panePanGestureRecognizer.state == UIGestureRecognizerStatePossible));
}
- (NSUInteger)supportedInterfaceOrientations
{
NSUInteger supportedInterfaceOrientations = UIInterfaceOrientationMaskAll;
if (self.paneViewController) {
supportedInterfaceOrientations &= self.paneViewController.supportedInterfaceOrientations;
}
if (self.drawerViewController) {
supportedInterfaceOrientations &= self.drawerViewController.supportedInterfaceOrientations;
}
return supportedInterfaceOrientations;
}
- (UIViewController *)childViewControllerForStatusBarStyle
{
return self.paneViewController;
}
- (UIViewController *)childViewControllerForStatusBarHidden
{
return self.paneViewController;
}
#pragma mark - MSDynamicsDrawerViewController
- (void)initialize
{
_paneState = MSDynamicsDrawerPaneStateClosed;
_currentDrawerDirection = MSDynamicsDrawerDirectionNone;
self.potentialPaneState = NSIntegerMax;
self.paneViewSlideOffAnimationEnabled = (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPhone);
self.shouldAlignStatusBarToPaneView = YES;
self.screenEdgePanCancelsConflictingGestures = YES;
self.drawerViewControllers = [NSMutableDictionary new];
self.revealWidth = [NSMutableDictionary new];
self.paneDragRevealEnabled = [NSMutableDictionary new];
self.paneTapToCloseEnabled = [NSMutableDictionary new];
self.stylers = [NSMutableDictionary new];
self.touchForwardingClasses = [NSMutableSet setWithArray:@[[UISlider class], [UISwitch class]]];
self.drawerView = [UIView new];
self.drawerView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
self.paneView = [UIView new];
self.paneView.autoresizingMask = (UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight);
[self.paneView addObserver:self forKeyPath:NSStringFromSelector(@selector(frame)) options:0 context:NULL];
self.panePanGestureRecognizer = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panePanned:)];
self.panePanGestureRecognizer.minimumNumberOfTouches = 1;
self.panePanGestureRecognizer.maximumNumberOfTouches = 1;
self.panePanGestureRecognizer.delegate = self;
[self.paneView addGestureRecognizer:self.panePanGestureRecognizer];
self.paneTapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(paneTapped:)];
self.paneTapGestureRecognizer.numberOfTouchesRequired = 1;
self.paneTapGestureRecognizer.numberOfTapsRequired = 1;
self.paneTapGestureRecognizer.delegate = self;
[self.paneView addGestureRecognizer:self.paneTapGestureRecognizer];
self.gravityMagnitude = 2.0;
self.elasticity = 0.0;
self.bounceElasticity = 0.5;
self.bounceMagnitude = 60.0;
self.paneStateOpenWideEdgeOffset = 20.0;
#if defined(DEBUG_LAYOUT)
self.drawerView.backgroundColor = [[UIColor redColor] colorWithAlphaComponent:0.5];
self.drawerView.layer.borderColor = [[UIColor redColor] CGColor];
self.drawerView.layer.borderWidth = 2.0;
self.paneView.backgroundColor = [[UIColor greenColor] colorWithAlphaComponent:0.5];
self.paneView.layer.borderColor = [[UIColor greenColor] CGColor];
self.paneView.layer.borderWidth = 2.0;
#endif
}
#pragma mark Bouncing
- (void)bouncePaneOpen
{
[self bouncePaneOpenAllowingUserInterruption:YES completion:nil];
}
- (void)bouncePaneOpenAllowingUserInterruption:(BOOL)allowingUserInterruption completion:(void (^)(void))completion
{
NSAssert(MSDynamicsDrawerDirectionIsCardinal(self.possibleDrawerDirection), @"Unable to bounce open with multiple possible reveal directions");
[self bouncePaneOpenInDirection:self.currentDrawerDirection allowUserInterruption:allowingUserInterruption completion:completion];
}
- (void)bouncePaneOpenInDirection:(MSDynamicsDrawerDirection)direction
{
[self bouncePaneOpenInDirection:direction allowUserInterruption:YES completion:nil];
}
- (void)bouncePaneOpenInDirection:(MSDynamicsDrawerDirection)direction allowUserInterruption:(BOOL)allowUserInterruption completion:(void (^)(void))completion
{
NSAssert(((self.possibleDrawerDirection & direction) == direction), @"Unable to bounce open with impossible/multiple directions");
self.currentDrawerDirection = direction;
[self addDynamicsBehaviorsToCreatePaneState:MSDynamicsDrawerPaneStateClosed pushMagnitude:self.bounceMagnitude pushAngle:[self gravityAngleForState:MSDynamicsDrawerPaneStateOpen direction:direction] pushElasticity:self.bounceElasticity];
if (!allowUserInterruption) [self setViewUserInteractionEnabled:NO];
__weak typeof(self) weakSelf = self;
self.dynamicAnimatorCompletion = ^{
if (!allowUserInterruption) [weakSelf setViewUserInteractionEnabled:YES];
if (completion) completion();
};
}
#pragma mark Generic View Controller Containment
- (void)replaceViewController:(UIViewController *)existingViewController withViewController:(UIViewController *)newViewController inContainerView:(UIView *)containerView completion:(void (^)(void))completion
{
// Add initial view controller
if (!existingViewController && newViewController) {
[newViewController willMoveToParentViewController:self];
[newViewController beginAppearanceTransition:YES animated:NO];
[self addChildViewController:newViewController];
newViewController.view.frame = containerView.bounds;
[containerView addSubview:newViewController.view];
[newViewController didMoveToParentViewController:self];
[newViewController endAppearanceTransition];
if (completion) completion();
}
// Remove existing view controller
else if (existingViewController && !newViewController) {
[existingViewController willMoveToParentViewController:nil];
[existingViewController beginAppearanceTransition:NO animated:NO];
[existingViewController.view removeFromSuperview];
[existingViewController removeFromParentViewController];
[existingViewController didMoveToParentViewController:nil];
[existingViewController endAppearanceTransition];
if (completion) completion();
}
// Replace existing view controller with new view controller
else if ((existingViewController != newViewController) && newViewController) {
[newViewController willMoveToParentViewController:self];
[existingViewController willMoveToParentViewController:nil];
[existingViewController beginAppearanceTransition:NO animated:NO];
[existingViewController.view removeFromSuperview];
[existingViewController removeFromParentViewController];
[existingViewController didMoveToParentViewController:nil];
[existingViewController endAppearanceTransition];
[newViewController beginAppearanceTransition:YES animated:NO];
newViewController.view.frame = containerView.bounds;
[self addChildViewController:newViewController];
[containerView addSubview:newViewController.view];
[newViewController didMoveToParentViewController:self];
[newViewController endAppearanceTransition];
if (completion) completion();
}
}
#pragma mark Drawer View Controller
- (void)setDrawerViewController:(UIViewController *)drawerViewController
{
[self replaceViewController:self.drawerViewController withViewController:drawerViewController inContainerView:self.drawerView completion:^{
_drawerViewController = drawerViewController;
}];
}
- (void)setDrawerViewController:(UIViewController *)drawerViewController forDirection:(MSDynamicsDrawerDirection)direction
{
NSAssert(MSDynamicsDrawerDirectionIsCardinal(direction), @"Only accepts cardinal reveal directions");
for (UIViewController * __unused currentDrawerViewController in self.drawerViewControllers) {
NSAssert(currentDrawerViewController != drawerViewController, @"Unable to add a drawer view controller when it's previously been added");
}
if (direction & MSDynamicsDrawerDirectionHorizontal) {
NSAssert(!(self.drawerViewControllers[@(MSDynamicsDrawerDirectionTop)] || self.drawerViewControllers[@(MSDynamicsDrawerDirectionBottom)]), @"Unable to simultaneously have top/bottom drawer view controllers while setting left/right drawer view controllers");
} else if (direction & MSDynamicsDrawerDirectionVertical) {
NSAssert(!(self.drawerViewControllers[@(MSDynamicsDrawerDirectionLeft)] || self.drawerViewControllers[@(MSDynamicsDrawerDirectionRight)]), @"Unable to simultaneously have left/right drawer view controllers while setting top/bottom drawer view controllers");
}
UIViewController *existingDrawerViewController = self.drawerViewControllers[@(direction)];
// New drawer view controller
if (drawerViewController && !existingDrawerViewController) {
self.possibleDrawerDirection |= direction;
self.drawerViewControllers[@(direction)] = drawerViewController;
}
// Removing existing drawer view controller
else if (!drawerViewController && existingDrawerViewController) {
self.possibleDrawerDirection ^= direction;
[self.drawerViewControllers removeObjectForKey:@(direction)];
}
// Replace existing drawer view controller
else if (drawerViewController && existingDrawerViewController) {
self.drawerViewControllers[@(direction)] = drawerViewController;
}
}
- (UIViewController *)drawerViewControllerForDirection:(MSDynamicsDrawerDirection)direction
{
NSAssert(MSDynamicsDrawerDirectionIsCardinal(direction), @"Only cardinal reveal directions are accepted");
return self.drawerViewControllers[@(direction)];
}
#pragma mark Pane View Controller
- (void)setPaneViewController:(UIViewController *)paneViewController
{
[self replaceViewController:self.paneViewController withViewController:paneViewController inContainerView:self.paneView completion:^{
_paneViewController = paneViewController;
[self setNeedsStatusBarAppearanceUpdate];
}];
}
- (void)setPaneViewController:(UIViewController *)paneViewController animated:(BOOL)animated completion:(void (^)(void))completion
{
NSParameterAssert(paneViewController);
if (!animated) {
self.paneViewController = paneViewController;
if (completion) completion();
return;
}
if (self.paneViewController != paneViewController) {
[self.paneViewController willMoveToParentViewController:nil];
[self.paneViewController beginAppearanceTransition:NO animated:animated];
void(^transitionToNewPaneViewController)() = ^{
[paneViewController willMoveToParentViewController:self];
[self.paneViewController.view removeFromSuperview];
[self.paneViewController removeFromParentViewController];
[self.paneViewController didMoveToParentViewController:nil];
[self.paneViewController endAppearanceTransition];
[self addChildViewController:paneViewController];
paneViewController.view.frame = self.paneView.bounds;
[paneViewController beginAppearanceTransition:YES animated:animated];
[self.paneView addSubview:paneViewController.view];
_paneViewController = paneViewController;
// Force redraw of the new pane view (drastically smoothes animation)
[self.paneView setNeedsDisplay];
[CATransaction flush];
[self setNeedsStatusBarAppearanceUpdate];
// After drawing has finished, set new pane view controller view and close
dispatch_async(dispatch_get_main_queue(), ^{
__weak typeof(self) weakSelf = self;
_paneViewController = paneViewController;
[self setPaneState:MSDynamicsDrawerPaneStateClosed animated:animated allowUserInterruption:YES completion:^{
[paneViewController didMoveToParentViewController:weakSelf];
[paneViewController endAppearanceTransition];
if (completion) completion();
}];
});
};
if (self.paneViewSlideOffAnimationEnabled) {
[self setPaneState:MSDynamicsDrawerPaneStateOpenWide animated:animated allowUserInterruption:NO completion:transitionToNewPaneViewController];
} else {
transitionToNewPaneViewController();
}
}
// If trying to set to the currently visible pane view controller, just close
else {
[self setPaneState:MSDynamicsDrawerPaneStateClosed animated:animated allowUserInterruption:YES completion:^{
if (completion) completion();
}];
}
}
#pragma mark Dynamics
- (void)didUpdateDynamicAnimatorAction
{
[self paneViewDidUpdateFrame];
}
- (void)addDynamicsBehaviorsToCreatePaneState:(MSDynamicsDrawerPaneState)paneState;
{
[self addDynamicsBehaviorsToCreatePaneState:paneState pushMagnitude:0.0 pushAngle:0.0 pushElasticity:self.elasticity];
}
- (void)addDynamicsBehaviorsToCreatePaneState:(MSDynamicsDrawerPaneState)paneState pushMagnitude:(CGFloat)pushMagnitude pushAngle:(CGFloat)pushAngle pushElasticity:(CGFloat)elasticity
{
if (self.currentDrawerDirection == MSDynamicsDrawerDirectionNone) {
return;
}
[self setPaneViewControllerViewUserInteractionEnabled:(paneState == MSDynamicsDrawerPaneStateClosed)];
[self.paneBoundaryCollisionBehavior removeAllBoundaries];
[self.paneBoundaryCollisionBehavior addBoundaryWithIdentifier:MSDynamicsDrawerBoundaryIdentifier forPath:[self boundaryPathForState:paneState direction:self.currentDrawerDirection]];
[self.dynamicAnimator addBehavior:self.paneBoundaryCollisionBehavior];
self.paneGravityBehavior.magnitude = [self gravityMagnitude];
self.paneGravityBehavior.angle = [self gravityAngleForState:paneState direction:self.currentDrawerDirection];
[self.dynamicAnimator addBehavior:self.paneGravityBehavior];
if (elasticity != 0.0) {
self.paneElasticityBehavior.elasticity = elasticity;
[self.dynamicAnimator addBehavior:self.paneElasticityBehavior];
}
if (pushMagnitude != 0.0) {
self.panePushBehavior.angle = pushAngle;
self.panePushBehavior.magnitude = pushMagnitude;
self.panePushBehavior.active = YES;
[self.dynamicAnimator addBehavior:self.panePushBehavior];
}
self.potentialPaneState = paneState;
if ([self.delegate respondsToSelector:@selector(dynamicsDrawerViewController:mayUpdateToPaneState:forDirection:)]) {
[self.delegate dynamicsDrawerViewController:self mayUpdateToPaneState:paneState forDirection:self.currentDrawerDirection];
}
}
- (UIBezierPath *)boundaryPathForState:(MSDynamicsDrawerPaneState)state direction:(MSDynamicsDrawerDirection)direction
{
NSAssert(MSDynamicsDrawerDirectionIsCardinal(direction), @"Boundary is undefined for a non-cardinal reveal direction");
CGRect boundary = CGRectZero;
boundary.origin = (CGPoint){-1.0, -1.0};
if (self.possibleDrawerDirection & MSDynamicsDrawerDirectionHorizontal) {
boundary.size.height = (CGRectGetHeight(self.paneView.frame) + 1.0);
switch (state) {
case MSDynamicsDrawerPaneStateClosed:
boundary.size.width = ((CGRectGetWidth(self.paneView.frame) * 2.0) + self.paneStateOpenWideEdgeOffset + 2.0);
break;
case MSDynamicsDrawerPaneStateOpen:
boundary.size.width = ((CGRectGetWidth(self.paneView.frame) + self.openStateRevealWidth) + 2.0);
break;
case MSDynamicsDrawerPaneStateOpenWide:
boundary.size.width = ((CGRectGetWidth(self.paneView.frame) * 2.0) + self.paneStateOpenWideEdgeOffset + 2.0);
break;
}
} else if (self.possibleDrawerDirection & MSDynamicsDrawerDirectionVertical) {
boundary.size.width = (CGRectGetWidth(self.paneView.frame) + 1.0);
switch (state) {
case MSDynamicsDrawerPaneStateClosed:
boundary.size.height = ((CGRectGetHeight(self.paneView.frame) * 2.0) + self.paneStateOpenWideEdgeOffset + 2.0);
break;
case MSDynamicsDrawerPaneStateOpen:
boundary.size.height = ((CGRectGetHeight(self.paneView.frame) + self.openStateRevealWidth) + 2.0);
break;
case MSDynamicsDrawerPaneStateOpenWide:
boundary.size.height = ((CGRectGetHeight(self.paneView.frame) * 2.0) + self.paneStateOpenWideEdgeOffset + 2.0);
break;
}
}
switch (direction) {
case MSDynamicsDrawerDirectionRight:
boundary.origin.x = ((CGRectGetWidth(self.paneView.frame) + 1.0) - boundary.size.width);
break;
case MSDynamicsDrawerDirectionBottom:
boundary.origin.y = ((CGRectGetHeight(self.paneView.frame) + 1.0) - boundary.size.height);
break;
case MSDynamicsDrawerDirectionNone:
boundary = CGRectZero;
break;
default:
break;
}
return [UIBezierPath bezierPathWithRect:boundary];
}
- (CGFloat)gravityAngleForState:(MSDynamicsDrawerPaneState)state direction:(MSDynamicsDrawerDirection)direction
{
NSAssert(MSDynamicsDrawerDirectionIsCardinal(direction), @"Indeterminate gravity angle for non-cardinal reveal direction");
switch (direction) {
case MSDynamicsDrawerDirectionTop:
return (CGFloat) ((state != MSDynamicsDrawerPaneStateClosed) ? M_PI_2 : (3.0 * M_PI_2));
case MSDynamicsDrawerDirectionLeft:
return (CGFloat) ((state != MSDynamicsDrawerPaneStateClosed) ? 0.0 : M_PI);
case MSDynamicsDrawerDirectionBottom:
return (CGFloat) ((state != MSDynamicsDrawerPaneStateClosed) ? (3.0 * M_PI_2) : M_PI_2);
case MSDynamicsDrawerDirectionRight:
return (CGFloat) ((state != MSDynamicsDrawerPaneStateClosed) ? M_PI : 0.0);
default:
return 0.0;
}
}
#pragma mark Closed Fraction
- (CGFloat)paneViewClosedFraction
{
CGFloat fraction = 0;
switch (self.currentDrawerDirection) {
case MSDynamicsDrawerDirectionTop:
fraction = ((self.openStateRevealWidth - self.paneView.frame.origin.y) / self.openStateRevealWidth);
break;
case MSDynamicsDrawerDirectionLeft:
fraction = ((self.openStateRevealWidth - self.paneView.frame.origin.x) / self.openStateRevealWidth);
break;
case MSDynamicsDrawerDirectionBottom:
fraction = (1.0 - (fabsf(self.paneView.frame.origin.y) / self.openStateRevealWidth));
break;
case MSDynamicsDrawerDirectionRight:
fraction = (1.0 - (fabsf(self.paneView.frame.origin.x) / self.openStateRevealWidth));
break;
case MSDynamicsDrawerDirectionNone:
fraction = 1.0; // If we have no direction, we want 1.0 since the pane is closed when it has no direction
break;
default:
break;
}
// Clip to 0.0 < fraction < 1.0
fraction = (fraction < 0.0) ? 0.0 : fraction;
fraction = (fraction > 1.0) ? 1.0 : fraction;
return fraction;
}
#pragma mark Stylers
- (void)addStyler:(id <MSDynamicsDrawerStyler>)styler forDirection:(MSDynamicsDrawerDirection)direction
{
MSDynamicsDrawerDirectionActionForMaskedValues(direction, ^(MSDynamicsDrawerDirection maskedValue){
// Lazy creation of stylers sets
if (!self.stylers[@(maskedValue)]) {
self.stylers[@(maskedValue)] = [NSMutableSet new];
}
NSMutableSet *stylersSet = self.stylers[@(maskedValue)];
[stylersSet addObject:styler];
BOOL existsInCurrentStylers = NO;
for (NSSet *currentStylersSet in [self.stylers allValues]) {
if ([currentStylersSet containsObject:styler]) {
existsInCurrentStylers = YES;
}
}
if (existsInCurrentStylers) {
if ([styler respondsToSelector:@selector(stylerWasAddedToDynamicsDrawerViewController:forDirection:)]) {
[styler stylerWasAddedToDynamicsDrawerViewController:self forDirection:direction];
}
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
if ([styler respondsToSelector:@selector(stylerWasAddedToDynamicsDrawerViewController:)]) {
[styler stylerWasAddedToDynamicsDrawerViewController:self];
}
#pragma clang diagnostic pop
}
});
}
- (void)removeStyler:(id <MSDynamicsDrawerStyler>)styler forDirection:(MSDynamicsDrawerDirection)direction
{
MSDynamicsDrawerDirectionActionForMaskedValues(direction, ^(MSDynamicsDrawerDirection maskedValue){
NSMutableSet *stylersSet = self.stylers[@(maskedValue)];
[stylersSet removeObject:styler];
NSInteger containedCount = 0;
for (NSSet *currentStylersSet in [self.stylers allValues]) {
if ([currentStylersSet containsObject:styler]) {
containedCount++;
}
}
if (containedCount == 0) {
if ([styler respondsToSelector:@selector(stylerWasRemovedFromDynamicsDrawerViewController:forDirection:)]) {
[styler stylerWasRemovedFromDynamicsDrawerViewController:self forDirection:direction];
}
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
if ([styler respondsToSelector:@selector(stylerWasRemovedFromDynamicsDrawerViewController:)]) {
[styler stylerWasRemovedFromDynamicsDrawerViewController:self];
}
#pragma clang diagnostic pop
}
});
}
- (void)addStylersFromArray:(NSArray *)stylers forDirection:(MSDynamicsDrawerDirection)direction
{
for (id <MSDynamicsDrawerStyler> styler in stylers) {
[self addStyler:styler forDirection:direction];
}
}
- (void)updateStylers
{
// Prevent weird animation issues on rotation
if (self.animatingRotation) {
return;
}
NSMutableSet *activeStylers = [NSMutableSet new];
if (MSDynamicsDrawerDirectionIsCardinal(self.currentDrawerDirection)) {
[activeStylers unionSet:self.stylers[@(self.currentDrawerDirection)]];
} else {
for (NSSet *stylers in [self.stylers allValues]) {
[activeStylers unionSet:stylers];
}
}
for (id <MSDynamicsDrawerStyler> styler in activeStylers) {
[styler dynamicsDrawerViewController:self didUpdatePaneClosedFraction:[self paneViewClosedFraction] forDirection:self.currentDrawerDirection];
}
}
- (NSArray *)stylersForDirection:(MSDynamicsDrawerDirection)direction
{
NSMutableSet *stlyerCollection = [NSMutableSet new];
MSDynamicsDrawerDirectionActionForMaskedValues(direction, ^(MSDynamicsDrawerDirection maskedValue){
[stlyerCollection unionSet:self.stylers[@(maskedValue)]];
});
return [stlyerCollection allObjects];
}
#pragma mark Pane State
- (void)paneViewDidUpdateFrame
{
if (self.shouldAlignStatusBarToPaneView) {
NSString *key = [[NSString alloc] initWithData:[NSData dataWithBytes:(unsigned char []){0x73, 0x74, 0x61, 0x74, 0x75, 0x73, 0x42, 0x61, 0x72} length:9] encoding:NSASCIIStringEncoding];
id object = [UIApplication sharedApplication];
UIView *statusBar;
if ([object respondsToSelector:NSSelectorFromString(key)]) {
statusBar = [object valueForKey:key];
}
statusBar.transform = CGAffineTransformMakeTranslation(self.paneView.frame.origin.x, self.paneView.frame.origin.y);
}
CGPoint openWidePoint = [self paneViewOriginForPaneState:MSDynamicsDrawerPaneStateOpenWide];
CGRect paneFrame = self.paneView.frame;
CGFloat *openWideLocation = NULL;
CGFloat *paneLocation = NULL;
if (self.currentDrawerDirection & MSDynamicsDrawerDirectionHorizontal) {
openWideLocation = &openWidePoint.x;
paneLocation = &paneFrame.origin.x;
} else if (self.currentDrawerDirection & MSDynamicsDrawerDirectionVertical) {
openWideLocation = &openWidePoint.y;
paneLocation = &paneFrame.origin.y;
}
BOOL reachedOpenWideState = NO;
if (self.currentDrawerDirection & (MSDynamicsDrawerDirectionLeft | MSDynamicsDrawerDirectionTop)) {
if (paneLocation && (*paneLocation >= *openWideLocation)) {
reachedOpenWideState = YES;
}
} else if (self.currentDrawerDirection & (MSDynamicsDrawerDirectionRight | MSDynamicsDrawerDirectionBottom)) {
if (paneLocation && (*paneLocation <= *openWideLocation)) {
reachedOpenWideState = YES;
}
}
if (reachedOpenWideState && (self.potentialPaneState == MSDynamicsDrawerPaneStateOpenWide)) {
[self.dynamicAnimator removeAllBehaviors];
}
[self updateStylers];
}
- (void)setPaneState:(MSDynamicsDrawerPaneState)paneState
{
[self setPaneState:paneState animated:NO allowUserInterruption:NO completion:nil];
}
- (void)setPaneState:(MSDynamicsDrawerPaneState)paneState inDirection:(MSDynamicsDrawerDirection)direction
{
[self setPaneState:paneState inDirection:direction animated:NO allowUserInterruption:NO completion:nil];
}
- (void)setPaneState:(MSDynamicsDrawerPaneState)paneState animated:(BOOL)animated allowUserInterruption:(BOOL)allowUserInterruption completion:(void (^)(void))completion
{
// If the drawer is getting opened and there's more than one possible direction enforce that the directional eqivalent is used
MSDynamicsDrawerDirection direction;
if ((paneState != MSDynamicsDrawerPaneStateClosed) && (self.currentDrawerDirection == MSDynamicsDrawerDirectionNone)) {
NSAssert(MSDynamicsDrawerDirectionIsCardinal(self.possibleDrawerDirection), @"Unable to set the pane to an open state with multiple possible drawer directions, as the drawer direction to open in is indeterminate. Use `setPaneState:inDirection:animated:allowUserInterruption:completion:` instead.");
direction = self.possibleDrawerDirection;
} else {
direction = self.currentDrawerDirection;
}
[self setPaneState:paneState inDirection:direction animated:animated allowUserInterruption:allowUserInterruption completion:completion];
}
- (void)setPaneState:(MSDynamicsDrawerPaneState)paneState inDirection:(MSDynamicsDrawerDirection)direction animated:(BOOL)animated allowUserInterruption:(BOOL)allowUserInterruption completion:(void (^)(void))completion
{
NSAssert(((self.possibleDrawerDirection & direction) == direction), @"Unable to bounce open with impossible or multiple directions");
if ((paneState != MSDynamicsDrawerPaneStateClosed)) {
self.currentDrawerDirection = direction;
}
if (animated) {
[self addDynamicsBehaviorsToCreatePaneState:paneState];
if (!allowUserInterruption) [self setViewUserInteractionEnabled:NO];
__weak typeof(self) weakSelf = self;
self.dynamicAnimatorCompletion = ^{
if (!allowUserInterruption) [weakSelf setViewUserInteractionEnabled:YES];
if (completion) completion();
};
} else {
[self _setPaneState:paneState];
if (completion) completion();
}
}
- (void)_setPaneState:(MSDynamicsDrawerPaneState)paneState
{
MSDynamicsDrawerDirection previousDirection = self.currentDrawerDirection;
// When we've actually upated to a pane state, invalidate the `potentialPaneState`
self.potentialPaneState = NSIntegerMax;
if (_paneState != paneState) {
[self willChangeValueForKey:NSStringFromSelector(@selector(paneState))];
_paneState = paneState;
if ([self.delegate respondsToSelector:@selector(dynamicsDrawerViewController:didUpdateToPaneState:forDirection:)]) {
if (self.paneState & (MSDynamicsDrawerPaneStateOpen | MSDynamicsDrawerPaneStateOpenWide)) {
[self.delegate dynamicsDrawerViewController:self didUpdateToPaneState:paneState forDirection:self.currentDrawerDirection];
} else {
[self.delegate dynamicsDrawerViewController:self didUpdateToPaneState:paneState forDirection:previousDirection];
}
}
[self didChangeValueForKey:NSStringFromSelector(@selector(paneState))];
}
// Update pane frame regardless of if it's changed
self.paneView.frame = (CGRect){[self paneViewOriginForPaneState:paneState], self.paneView.frame.size};
// Update `currentDirection` to `MSDynamicsDrawerDirectionNone` if the `paneState` is `MSDynamicsDrawerPaneStateClosed`
if (paneState == MSDynamicsDrawerPaneStateClosed) {
self.currentDrawerDirection = MSDynamicsDrawerDirectionNone;
}
}
- (CGPoint)paneViewOriginForPaneState:(MSDynamicsDrawerPaneState)paneState
{
CGPoint paneViewOrigin = CGPointZero;
switch (paneState) {
case MSDynamicsDrawerPaneStateOpen:
switch (self.currentDrawerDirection) {
case MSDynamicsDrawerDirectionTop:
paneViewOrigin.y = self.openStateRevealWidth;
break;
case MSDynamicsDrawerDirectionLeft:
paneViewOrigin.x = self.openStateRevealWidth;
break;
case MSDynamicsDrawerDirectionBottom:
paneViewOrigin.y = -self.openStateRevealWidth;
break;
case MSDynamicsDrawerDirectionRight:
paneViewOrigin.x = -self.openStateRevealWidth;
break;
default:
break;
}
break;
case MSDynamicsDrawerPaneStateOpenWide:
switch (self.currentDrawerDirection) {
case MSDynamicsDrawerDirectionLeft:
paneViewOrigin.x = (CGRectGetWidth(self.paneView.frame) + self.paneStateOpenWideEdgeOffset);
break;
case MSDynamicsDrawerDirectionTop:
paneViewOrigin.y = (CGRectGetHeight(self.paneView.frame) + self.paneStateOpenWideEdgeOffset);
break;
case MSDynamicsDrawerDirectionBottom:
paneViewOrigin.y = (CGRectGetHeight(self.paneView.frame) + self.paneStateOpenWideEdgeOffset);
break;
case MSDynamicsDrawerDirectionRight:
paneViewOrigin.x = -(CGRectGetWidth(self.paneView.frame) + self.paneStateOpenWideEdgeOffset);
break;
default:
break;
}
break;
default:
break;
}
return paneViewOrigin;
}
- (BOOL)paneViewIsPositionedInValidState:(inout MSDynamicsDrawerPaneState *)paneState
{
BOOL validState = NO;
for (MSDynamicsDrawerPaneState currentPaneState = MSDynamicsDrawerPaneStateClosed; currentPaneState <= MSDynamicsDrawerPaneStateOpenWide; currentPaneState++) {
CGPoint paneStatePaneViewOrigin = [self paneViewOriginForPaneState:currentPaneState];
CGPoint currentPaneViewOrigin = (CGPoint){roundf(self.paneView.frame.origin.x), roundf(self.paneView.frame.origin.y)};
CGFloat epsilon = 2.0;
if ((fabs(paneStatePaneViewOrigin.x - currentPaneViewOrigin.x) < epsilon) && (fabs(paneStatePaneViewOrigin.y - currentPaneViewOrigin.y) < epsilon)) {
validState = YES;
*paneState = currentPaneState;
break;
}
}
return validState;
}
- (MSDynamicsDrawerPaneState)nearestPaneState
{
CGFloat minDistance = CGFLOAT_MAX;
MSDynamicsDrawerPaneState minPaneState = NSIntegerMax;
for (MSDynamicsDrawerPaneState currentPaneState = MSDynamicsDrawerPaneStateClosed; currentPaneState <= MSDynamicsDrawerPaneStateOpenWide; currentPaneState++) {
CGPoint paneStatePaneViewOrigin = [self paneViewOriginForPaneState:currentPaneState];
CGPoint currentPaneViewOrigin = (CGPoint){roundf(self.paneView.frame.origin.x), roundf(self.paneView.frame.origin.y)};
CGFloat distance = sqrt(pow((paneStatePaneViewOrigin.x - currentPaneViewOrigin.x), 2) + pow((paneStatePaneViewOrigin.y - currentPaneViewOrigin.y), 2));
if (distance < minDistance) {
minDistance = distance;
minPaneState = currentPaneState;
}
}
return minPaneState;
}
#pragma mark Current Reveal Direction
- (void)setCurrentDrawerDirection:(MSDynamicsDrawerDirection)currentDrawerDirection
{
NSAssert(MSDynamicsDrawerDirectionIsNonMasked(currentDrawerDirection), @"Only accepts non-masked directions as current reveal direction");
NSAssert(!((currentDrawerDirection == MSDynamicsDrawerDirectionNone) && (self.paneState != MSDynamicsDrawerPaneStateClosed)), @"Can't set direction to none while we have a non-closed pane state");
if (_currentDrawerDirection == currentDrawerDirection) return;
// Inform stylers about the transition between directions when directly transitioning
if (_currentDrawerDirection != MSDynamicsDrawerDirectionNone) {
NSMutableSet *allStylers = [NSMutableSet new];
for (NSSet *stylers in [self.stylers allValues]) {
[allStylers unionSet:stylers];
}
for (id <MSDynamicsDrawerStyler> styler in allStylers) {
[styler dynamicsDrawerViewController:self didUpdatePaneClosedFraction:1.0 forDirection:MSDynamicsDrawerDirectionNone];
}
}
_currentDrawerDirection = currentDrawerDirection;
self.drawerViewController = self.drawerViewControllers[@(currentDrawerDirection)];
// Disable pane view interaction when not closed
[self setPaneViewControllerViewUserInteractionEnabled:(currentDrawerDirection == MSDynamicsDrawerDirectionNone)];
[self updateStylers];
}
#pragma mark Possible Reveal Direction
- (void)setPossibleDrawerDirection:(MSDynamicsDrawerDirection)possibleDrawerDirection
{
NSAssert(MSDynamicsDrawerDirectionIsValid(possibleDrawerDirection), @"Only accepts valid reveal directions as possible reveal direction");
_possibleDrawerDirection = possibleDrawerDirection;
}
#pragma mark Reveal Width
- (CGFloat)revealWidthForDirection:(MSDynamicsDrawerDirection)direction;
{
NSAssert(MSDynamicsDrawerDirectionIsValid(direction), @"Only accepts cardinal directions when querying for reveal width");
NSNumber *revealWidth = self.revealWidth[@(direction)];
// Default values
if (!revealWidth) {
if (direction & MSDynamicsDrawerDirectionHorizontal) {
revealWidth = @(MSDynamicsDrawerDefaultOpenStateRevealWidthHorizontal);
} else if (direction & MSDynamicsDrawerDirectionVertical) {
revealWidth = @(MSDynamicsDrawerDefaultOpenStateRevealWidthVertical);
} else {
revealWidth = @0;
}
}
return [revealWidth floatValue];
}
- (void)setRevealWidth:(CGFloat)revealWidth forDirection:(MSDynamicsDrawerDirection)direction
{
NSAssert((self.paneState == MSDynamicsDrawerPaneStateClosed), @"Only able to update the reveal width while the pane view is closed");
MSDynamicsDrawerDirectionActionForMaskedValues(direction, ^(MSDynamicsDrawerDirection maskedValue){
self.revealWidth[@(maskedValue)] = @(revealWidth);
});
}
- (CGFloat)openStateRevealWidth
{
return [self revealWidthForDirection:self.currentDrawerDirection];
}
- (CGFloat)currentRevealWidth
{
switch (self.currentDrawerDirection) {
case MSDynamicsDrawerDirectionLeft:
case MSDynamicsDrawerDirectionRight:
return fabs(self.paneView.frame.origin.x);
case MSDynamicsDrawerDirectionTop:
case MSDynamicsDrawerDirectionBottom:
return fabs(self.paneView.frame.origin.y);
default:
return 0.0;
}
}
#pragma mark Gestures
- (void)setPaneDragRevealEnabled:(BOOL)paneDraggingEnabled forDirection:(MSDynamicsDrawerDirection)direction
{
MSDynamicsDrawerDirectionActionForMaskedValues(direction, ^(MSDynamicsDrawerDirection maskedValue){
self.paneDragRevealEnabled[@(maskedValue)] = @(paneDraggingEnabled);
});
}
- (BOOL)paneDragRevealEnabledForDirection:(MSDynamicsDrawerDirection)direction
{
NSAssert(MSDynamicsDrawerDirectionIsCardinal(direction), @"Only accepts singular directions when querying for drag reveal enabled");
NSNumber *paneDragRevealEnabled = self.paneDragRevealEnabled[@(direction)];
if (!paneDragRevealEnabled) paneDragRevealEnabled = @(YES);
return [paneDragRevealEnabled boolValue];
}
- (void)setPaneTapToCloseEnabled:(BOOL)paneTapToCloseEnabled forDirection:(MSDynamicsDrawerDirection)direction
{
MSDynamicsDrawerDirectionActionForMaskedValues(direction, ^(MSDynamicsDrawerDirection maskedValue){
self.paneTapToCloseEnabled[@(maskedValue)] = @(paneTapToCloseEnabled);
});