Add tip tooltip to the conversion completed view (#105)

Co-Authored-By: Łukasz Mróz <thesunshinejr@gmail.com>

Gifski/ConversionCompletedViewController.swift

@@ -16,6 +16,13 @@ final class ConversionCompletedViewController: NSViewController {
 	private var conversion: Gifski.Conversion!
 	private var gifUrl: URL!
 
+	private let tooltip = Tooltip(
+		identifier: "conversionCompletedTips",
+		text: "Go ahead and drag the thumbnail to the Finder or Safari! You can also press Space to enlarge the preview.",
+		showOnlyOnce: true,
+		maxWidth: 260
+	)
+
 	convenience init(conversion: Gifski.Conversion, gifUrl: URL) {
 		self.init()
 
@@ -50,6 +57,10 @@ final class ConversionCompletedViewController: NSViewController {
 			draggableFile.layer?.animateScaleMove(fromScale: 3, fromY: view.frame.height + draggableFile.frame.size.height)
 			wrapperView.fadeIn(duration: 0.5, delay: 0.15, completion: nil)
 		}
+
+		delay(seconds: 1) {
+			self.tooltip.show(from: self.draggableFile, preferredEdge: .maxY)
+		}
 	}
 
 	private func setUpUI() {

Gifski/util.swift

@@ -21,6 +21,11 @@ func with<T>(_ item: T, update: (inout T) throws -> Void) rethrows -> T {
 }
 
 
+func delay(seconds: TimeInterval, closure: @escaping () -> Void) {
+	DispatchQueue.main.asyncAfter(deadline: .now() + seconds, execute: closure)
+}
+
+
 struct Meta {
 	static func openSubmitFeedbackPage(message: String? = nil) {
 		let defaultMessage = "<!--\nProvide your feedback here. Include as many details as possible.\nYou can also email me at sindresorhus@gmail.com\n-->"