#import "DropdownMenuController.h"

#import "DropdownMenuSegue.h"

@implementation DropdownMenuController

CAShapeLayer *openMenuShape;

CAShapeLayer *closedMenuShape;

- (void)viewDidLoad {

[super viewDidLoad];

}

-(void) viewDidAppear:(BOOL)animated {

[super viewDidAppear:animated];

// Set the current view controller to the one embedded (in the storyboard).

self.currentViewController = self.childViewControllers.firstObject;

// Draw the shapes for the open and close menu triangle.

[self drawOpenLayer];

[self drawClosedLayer];

}

- (void) setMenubarTitle:(NSString *) menubarTitle {

self.titleLabel.text = menubarTitle;

}

- (void) setMenubarBackground:(UIColor *) color {

self.menubar.backgroundColor = color;

}

- (IBAction) menuButtonAction: (UIButton *) sender {

[self toggleMenu];

}

- (IBAction) listButtonAction: (UIButton *) sender {

[self hideMenu];

}

- (void) toggleMenu {

if(self.menu.hidden) {

[self showMenu];

} else {

[self hideMenu];

}

}

- (void) showMenu {

self.menu.hidden = NO;

[closedMenuShape removeFromSuperlayer];

[[[self view] layer] addSublayer:openMenuShape];

// Set new origin of menu

CGRect menuFrame = self.menu.frame;

menuFrame.origin.y = self.menubar.frame.size.height;

// Set new alpha of Container View (to get fade effect)

float containerAlpha = 0.5f;

[UIView animateWithDuration:0.4

delay:0.0

usingSpringWithDamping:1.0

initialSpringVelocity:4.0

options: UIViewAnimationOptionCurveEaseInOut

animations:^{

self.menu.frame = menuFrame;

[self.container setAlpha: containerAlpha];

}

completion:^(BOOL finished){

}];

[UIView commitAnimations];

}

- (void) hideMenu {

// Set the border layer to hidden menu state

[openMenuShape removeFromSuperlayer];

[[[self view] layer] addSublayer:closedMenuShape];

// Set new origin of menu

CGRect menuFrame = self.menu.frame;

menuFrame.origin.y = self.menubar.frame.size.height-menuFrame.size.height;

// Set new alpha of Container View (to get fade effect)

float containerAlpha = 1.0f;

[UIView animateWithDuration:0.3f

delay:0.05f

usingSpringWithDamping:1.0

initialSpringVelocity:4.0

options: UIViewAnimationOptionCurveEaseInOut

animations:^{

self.menu.frame = menuFrame;

[self.container setAlpha: containerAlpha];

}

completion:^(BOOL finished){

self.menu.hidden = YES;

}];

[UIView commitAnimations];

}

- (void) drawOpenLayer {

openMenuShape = [CAShapeLayer layer];

// Constants to ease drawing the border and the stroke.

int height = self.menubar.frame.size.height;

int width = self.menubar.frame.size.width;

int triangleSize = 8;

int trianglePosition = 0.87*width;

// The path for the triangle (showing that the menu is open).

UIBezierPath *triangleShape = [[UIBezierPath alloc] init];

[triangleShape moveToPoint:CGPointMake(trianglePosition, height)];

[triangleShape addLineToPoint:CGPointMake(trianglePosition+triangleSize, height-triangleSize)];

[triangleShape addLineToPoint:CGPointMake(trianglePosition+2*triangleSize, height)];

[triangleShape addLineToPoint:CGPointMake(trianglePosition, height)];

[openMenuShape setPath:triangleShape.CGPath];

//[openMenuShape setFillColor:[self.menubar.backgroundColor CGColor]];

[openMenuShape setFillColor:[self.menu.backgroundColor CGColor]];

UIBezierPath *borderPath = [[UIBezierPath alloc] init];

[borderPath moveToPoint:CGPointMake(0, height)];

[borderPath addLineToPoint:CGPointMake(trianglePosition, height)];

[borderPath addLineToPoint:CGPointMake(trianglePosition+triangleSize, height-triangleSize)];

[borderPath addLineToPoint:CGPointMake(trianglePosition+2*triangleSize, height)];

[borderPath addLineToPoint:CGPointMake(width, height)];

[openMenuShape setPath:borderPath.CGPath];

[openMenuShape setStrokeColor:[[UIColor whiteColor] CGColor]];

[openMenuShape setBounds:CGRectMake(0.0f, 0.0f, height+triangleSize, width)];

[openMenuShape setAnchorPoint:CGPointMake(0.0f, 0.0f)];

[openMenuShape setPosition:CGPointMake(0.0f, 0.0f)];

}

- (void) drawClosedLayer {

closedMenuShape = [CAShapeLayer layer];

// Constants to ease drawing the border and the stroke.

int height = self.menubar.frame.size.height;

int width = self.menubar.frame.size.width;

// The path for the border (just a straight line)

UIBezierPath *borderPath = [[UIBezierPath alloc] init];

[borderPath moveToPoint:CGPointMake(0, height)];

[borderPath addLineToPoint:CGPointMake(width, height)];

[closedMenuShape setPath:borderPath.CGPath];

[closedMenuShape setStrokeColor:[[UIColor whiteColor] CGColor]];

[closedMenuShape setBounds:CGRectMake(0.0f, 0.0f, height, width)];

[closedMenuShape setAnchorPoint:CGPointMake(0.0f, 0.0f)];

[closedMenuShape setPosition:CGPointMake(0.0f, 0.0f)];

}

- (IBAction)displayGestureForTapRecognizer:(UITapGestureRecognizer *)recognizer {

// Get the location of the gesture

CGPoint tapLocation = [recognizer locationInView:self.view];

// NSLog(@"Tap location X:%1.0f, Y:%1.0f", tapLocation.x, tapLocation.y);

// If menu is open, and the tap is outside of the menu, close it.

if (!CGRectContainsPoint(self.menu.frame, tapLocation) && !self.menu.hidden) {

[self hideMenu];

}

}

#pragma mark - Segue

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

self.currentSegueIdentifier = segue.identifier;

[super prepareForSegue:segue sender:sender];

}

- (BOOL)shouldPerformSegueWithIdentifier:(NSString *)identifier sender:(id)sender {

if ([self.currentSegueIdentifier isEqual:identifier]) {

//Dont perform segue, if visible ViewController is already the destination ViewController

return NO;

}

return YES;

}

#pragma mark - Memory Warning

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

}