/*

 Copyright (C) 2016 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 NSButton subclass demonstrating accessibility provided by AppKit.

 */

#import "AAPLTicTacToeCircleButtonView.h"

@interface AAPLTicTacToeCircleButtonView ()

@property (nonatomic) BOOL depressed;

@end

@implementation AAPLTicTacToeCircleButtonView

- (instancetype)initWithFrame:(NSRect)frame

{

    self = [super initWithFrame:frame];

    if ( self != nil )

    {

        // `commonSetup` was factored out of `initWithFrame:` for use in `prepareForInterfaceBuilder`.

        [self commonSetup];

    }

    return self;

}

- (void)commonSetup

{

    _lineWidth = 2.0;

    _color = [NSColor blackColor];

    _backgroundColor = [NSColor lightGrayColor];

    _backgroundDepressedColor = [NSColor grayColor];

    _inset = self.bounds.size.width / 10.0;

}

- (void)mouseDown:(NSEvent *)mouseEvent

{

    [super mouseDown:mouseEvent];

    self.depressed = YES;

    [self setNeedsDisplay:YES];

}

- (void)mouseUp:(NSEvent *)mouseEvent

{

    [super mouseUp:mouseEvent];

    self.depressed = NO;

    [self setNeedsDisplay:YES];

}

- (NSPoint)centerPoint

{

    return NSMakePoint(NSMidX(self.bounds), NSMidY(self.bounds));

}

- (CGFloat)radius

{

    return self.bounds.size.width / 2.0 - self.inset;

}

- (void)drawRect:(NSRect)dirtyRect

{

    [NSBezierPath setDefaultLineWidth:self.lineWidth];

    NSBezierPath *circlePath = [[NSBezierPath alloc] init];

    [circlePath appendBezierPathWithArcWithCenter:self.centerPoint

                                           radius:self.radius

                                       startAngle:0.0

                                         endAngle:360.0];

    if ( self.depressed )

    {

        [self.backgroundDepressedColor set];

    }

    else

    {

        [self.backgroundColor set];

    }

    [circlePath fill];

    [self.color set];

    [circlePath stroke];

    // Draw the focus ring

    BOOL isFirstResponder = [[[NSApp mainWindow] firstResponder] isEqual:self];

    if ( isFirstResponder )

    {

        [NSGraphicsContext saveGraphicsState];

        NSSetFocusRingStyle(NSFocusRingOnly);

        [circlePath fill];

        [NSGraphicsContext restoreGraphicsState];

    }

}

#pragma - Support IB_DESIGNABLE

// Executed when your view is being prepared for display in Interface Builder.

- (void)prepareForInterfaceBuilder {

    // Perform the `commonSetup` functionality to allow buttons to draw correctly.

    [self commonSetup];

}

@end