PDF_Office/PDF Office/PDF Master/Class/Home/View/KMDottedLineView.swift

//
//  KMDottedLineView.swift
//  PDF Master
//
//  Created by wanjun on 2023/5/19.
//

import Cocoa

@objc enum KMDrawBorderState : Int {
    case None = 0
    case Hover
    case Select
}

class KMDottedLineView: NSView {
    
    var state: KMDrawBorderState = .None
    
    var area: NSTrackingArea?
    var canHover : Bool! = true // 是否允许悬浮
    var canClick : Bool! = true // 是否允许点击

    deinit {
        if (self.area != nil) {
            self.removeTrackingArea(self.area!)
            self.area = nil
        }
    }

    override func draw(_ dirtyRect: NSRect) {
        super.draw(dirtyRect)
        
        if ((self.state == .Hover) || (self.state == .Select)) {
            let path = NSBezierPath(roundedRect: self.bounds, xRadius: 8.0, yRadius: 8.0)
            path.lineWidth = 1.0
            NSColor.km_init(hex: "#68ACF8").setStroke()
            path.stroke()
        } else {
            let path = NSBezierPath(roundedRect: self.bounds, xRadius: 8.0, yRadius: 8.0)
            
            path.setLineDash([3, 3, 3], count: 3, phase: 0)
            path.lineWidth = 1.0
            NSColor.km_init(hex: "#CED0D4").setStroke()
            path.stroke()
        }
    }
    
    override func updateTrackingAreas() {
        super.updateTrackingAreas()
        
        if let _area = self.area, _area.rect.isEmpty == false {
            if (_area.rect.equalTo(self.bounds)) {
                return
            }
        }
        
        if (self.area != nil) {
            self.removeTrackingArea(self.area!)
            self.area = nil
        }
        
        self.area = NSTrackingArea(rect: self.bounds, options: [.mouseEnteredAndExited, .mouseMoved, .activeAlways], owner: self)
        self.addTrackingArea(self.area!)
    }
    
    override func mouseEntered(with event: NSEvent) {
        if canHover {
            self.state = .Hover
            self.needsDisplay = true
        }
    }
    
    override func mouseExited(with event: NSEvent) {
        if canHover {
            self.state = .None
            self.needsDisplay = true
        }
    }
}