PDF_Office/PDF Office/PDF Master/Class/Common/OC/Control/KMCoverButton.m

//
//  KMCoverButton.m
//  PDF Reader
//
//  Created by tangchao on 2022/2/24.
//  Copyright © 2022 Kdan Mobile. All rights reserved.
//

#import "KMCoverButton.h"

@interface KMCoverButton ()

@property (nonatomic, strong) NSTrackingArea *area;

@end

@implementation KMCoverButton

- (void)dealloc {
    [self removeTrackingArea:_area];
}

- (void)updateTrackingAreas {
    [super updateTrackingAreas];
    
    if (self.area) {
        [self removeTrackingArea:self.area];
        self.area = nil;
    }
    
    int opts = (NSTrackingMouseEnteredAndExited | NSTrackingMouseMoved | NSTrackingActiveAlways);
    self.area = [[NSTrackingArea alloc] initWithRect:self.bounds options:opts owner:self userInfo:nil];
    
    [self addTrackingArea:self.area];
}

- (void)mouseEntered:(NSEvent *)event {
    if (self.coverAction) {
        self.coverAction(self, KMCoverActionEnter);
    }
}
- (void)mouseExited:(NSEvent *)event {
    if (self.coverAction) {
        self.coverAction(self, KMCoverActionExit);
    }
}
- (void)mouseMoved:(NSEvent *)event {
    if (self.coverAction) {
        self.coverAction(self, KMCoverActionMove);
    }
}

@end