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// Copyright © 2015 Abhishek Banthia
import AppKit
import Cocoa
class TextViewWithPlaceholder: NSTextView {
let placeholder = makePlaceHolder()
override init(frame frameRect: NSRect) {
super.init(frame: frameRect)
}
required init?(coder: NSCoder) {
super.init(coder: coder)
}
class func makePlaceHolder() -> NSAttributedString {
if let placeHolderFont = NSFont(name: "Avenir", size: 14) {
let textDict = [
NSAttributedString.Key.foregroundColor: NSColor.gray,
NSAttributedString.Key.font: placeHolderFont,
]
return NSAttributedString(string: " Add your notes here.", attributes: textDict)
}
return NSAttributedString(string: " Add your notes here")
}
override func becomeFirstResponder() -> Bool {
setNeedsDisplay(frame)
return super.becomeFirstResponder()
}
override func draw(_ dirtyRect: NSRect) {
super.draw(dirtyRect)
if string == CLEmptyString && self != window?.firstResponder {
placeholder.draw(at: NSPoint(x: 0, y: 0))
}
}
override func resignFirstResponder() -> Bool {
setNeedsDisplay(frame)
return super.resignFirstResponder()
}
}