Make sliders should be quantized. Issue #1342

iOS/Article/ArticleViewController.swift

@@ -123,6 +123,8 @@ class ArticleViewController: UIViewController {
 			webView.navigationDelegate = self
 			webView.uiDelegate = self
 
+			webView.addInteraction(UIContextMenuInteraction(delegate: self))
+
 			webView.configuration.userContentController.add(WrapperScriptMessageHandler(self), name: MessageName.imageWasClicked)
 			webView.configuration.userContentController.add(WrapperScriptMessageHandler(self), name: MessageName.imageWasShown)
 
@@ -340,6 +342,44 @@ class ArticleViewController: UIViewController {
 	
 }
 
+// MARK: InteractiveNavigationControllerTappable
+
+extension ArticleViewController: InteractiveNavigationControllerTappable {
+	func didTapNavigationBar() {
+		hideBars()
+	}
+}
+
+// MARK: UIContextMenuInteractionDelegate
+
+extension ArticleViewController: UIContextMenuInteractionDelegate {
+    func contextMenuInteraction(_ interaction: UIContextMenuInteraction, configurationForMenuAtLocation location: CGPoint) -> UIContextMenuConfiguration? {
+
+		return UIContextMenuConfiguration(identifier: nil, previewProvider: nil) { suggestedActions in
+			let action1 = UIAction(title: "Action 1", image: AppAssets.infoImage) { [weak self] action in
+			}
+			let action2 = UIAction(title: "Action 2", image: AppAssets.infoImage) { [weak self] action in
+			}
+			let action3 = UIAction(title: "Action 3", image: AppAssets.infoImage) { [weak self] action in
+			}
+			let action4 = UIAction(title: "Action 4", image: AppAssets.infoImage) { [weak self] action in
+			}
+			let action5 = UIAction(title: "Action 5", image: AppAssets.infoImage) { [weak self] action in
+			}
+			let action6 = UIAction(title: "Action 6", image: AppAssets.infoImage) { [weak self] action in
+			}
+			let action7 = UIAction(title: "Action 7", image: AppAssets.infoImage) { [weak self] action in
+			}
+			return UIMenu(title: "", children: [action1, action2, action3, action4, action5, action6, action7])
+        }
+    }
+	
+	func contextMenuInteraction(_ interaction: UIContextMenuInteraction, previewForHighlightingMenuWithConfiguration configuration: UIContextMenuConfiguration) -> UITargetedPreview? {
+		return UITargetedPreview(view: webView, parameters: CroppingPreviewParameters(view: webView, size: CGSize(width: webView.bounds.width, height: 200)))
+	}
+
+}
+
 // MARK: WKNavigationDelegate
 
 extension ArticleViewController: WKNavigationDelegate {
@@ -376,14 +416,6 @@ extension ArticleViewController: WKNavigationDelegate {
 	
 }
 
-// MARK: InteractiveNavigationControllerTappable
-
-extension ArticleViewController: InteractiveNavigationControllerTappable {
-	func didTapNavigationBar() {
-		hideBars()
-	}
-}
-
 // MARK: WKUIDelegate
 
 extension ArticleViewController: WKUIDelegate {

iOS/UIKit Extensions/CroppingPreviewParameters.swift

@@ -17,4 +17,11 @@ class CroppingPreviewParameters: UIPreviewParameters {
 		self.visiblePath = visiblePath
 	}
 
+	init(view: UIView, size: CGSize) {
+		super.init()
+		let newBounds = CGRect(x: 0, y: 0, width: size.width, height: size.height)
+		let visiblePath = UIBezierPath(roundedRect: newBounds, cornerRadius: 10)
+		self.visiblePath = visiblePath
+	}
+
 }

iOS/UIKit Extensions/TickMarkSlider.swift

@@ -13,9 +13,12 @@ class TickMarkSlider: UISlider {
 	private var enableFeedback = false
 	private let feedbackGenerator = UISelectionFeedbackGenerator()
 	
+	private var roundedValue: Float?
 	override var value: Float {
 		didSet {
-			if enableFeedback && value.truncatingRemainder(dividingBy: 1) == 0 {
+			let testValue = value.rounded()
+			if testValue != roundedValue && enableFeedback && value.truncatingRemainder(dividingBy: 1) == 0 {
+				roundedValue = testValue
 				feedbackGenerator.selectionChanged()
 			}
 		}
@@ -66,6 +69,12 @@ class TickMarkSlider: UISlider {
 		}
 				
 	}
+	
+	override func continueTracking(_ touch: UITouch, with event: UIEvent?) -> Bool {
+		let result = super.continueTracking(touch, with: event)
+		value = value.rounded()
+		return result
+	}
 
 	override func endTracking(_ touch: UITouch?, with event: UIEvent?) {
 		value = value.rounded()