From a98aa2ff2e556188d00b6888e035c15d574447b1 Mon Sep 17 00:00:00 2001
From: Eugene Mozharovsky <mozharovsky@live.com>
Date: Sun, 27 Nov 2016 00:23:14 +0300
Subject: [PATCH] Ignoring scrolling/zooming gestures on the bottom static line
 view #3

---
 .../CropViewController.swift                  |  8 ++---
 Source/CropableScrollViewDelegate.swift       | 34 ++++++++++++++++---
 2 files changed, 34 insertions(+), 8 deletions(-)

diff --git a/Example/Athlee-ImagePicker/Athlee-ImagePicker/CropViewController.swift b/Example/Athlee-ImagePicker/Athlee-ImagePicker/CropViewController.swift
index 7de6142..ce20520 100644
--- a/Example/Athlee-ImagePicker/Athlee-ImagePicker/CropViewController.swift
+++ b/Example/Athlee-ImagePicker/Athlee-ImagePicker/CropViewController.swift
@@ -81,7 +81,7 @@ final class CropViewController: UIViewController, FloatingViewLayout, Cropable {
     updateContent()
   }
   
-  var recognizersAdded = false
+  fileprivate var recognizersAdded = false
   override func viewDidAppear(_ animated: Bool) {
     super.viewDidAppear(animated)
     
@@ -153,10 +153,10 @@ final class CropViewController: UIViewController, FloatingViewLayout, Cropable {
   }
   
   func updateCropViewScrolling() {
-    if state == .folded || state == .moved {
-      cropView.isUserInteractionEnabled = false
+    if state == .moved {
+      delegate.isEnabled = false
     } else {
-      cropView.isUserInteractionEnabled = true
+      delegate.isEnabled = true
     }
   }
   
diff --git a/Source/CropableScrollViewDelegate.swift b/Source/CropableScrollViewDelegate.swift
index b58b118..cefaccf 100644
--- a/Source/CropableScrollViewDelegate.swift
+++ b/Source/CropableScrollViewDelegate.swift
@@ -16,7 +16,21 @@ open class CropableScrollViewDelegate<T: Cropable>: NSObject, UIScrollViewDelega
   
   open let linesView = LinesView()
   
-  fileprivate var panning = false
+  /// Indicates whether cropping should or should not be enabled for using.
+  open var isEnabled = true {
+    didSet {
+      if isEnabled {
+        cropable.cropView.isScrollEnabled = true
+      } else {
+        cropable.highlightArea(false, animated: false)
+        cropable.cropView.isScrollEnabled = false 
+      }
+    }
+  }
+  
+  fileprivate var isPanning = false
+  
+  // MARK: Initialization
   
   public init(cropable: T) {
     self.cropable = cropable
@@ -25,19 +39,25 @@ open class CropableScrollViewDelegate<T: Cropable>: NSObject, UIScrollViewDelega
   // MARK: UIScrollViewDelegate
   
   open func scrollViewWillBeginZooming(_ scrollView: UIScrollView, with view: UIView?) {
+    guard isEnabled else { return }
+    
     cropable.willZoom()
   }
   
   open func scrollViewDidZoom(_ scrollView: UIScrollView) {
+    guard isEnabled else { return }
+    
     cropable.didZoom()
   }
   
   open func scrollViewDidScroll(_ scrollView: UIScrollView) {
+    guard isEnabled else { return }
+    
     if cropable.alwaysShowGuidelines {
       cropable.highlightArea(true)
     }
     
-    guard panning else {
+    guard isPanning else {
       return
     }
     
@@ -45,12 +65,16 @@ open class CropableScrollViewDelegate<T: Cropable>: NSObject, UIScrollViewDelega
   }
   
   open func scrollViewWillBeginDragging(_ scrollView: UIScrollView) {
-    panning = true
+    guard isEnabled else { return }
+    
+    isPanning = true
     cropable.highlightArea(true)
   }
   
   open func scrollViewDidEndDragging(_ scrollView: UIScrollView, willDecelerate decelerate: Bool) {
-    panning = false
+    guard isEnabled else { return }
+    
+    isPanning = false
     
     if cropable.alwaysShowGuidelines {
       cropable.highlightArea(true, animated: false)
@@ -60,6 +84,8 @@ open class CropableScrollViewDelegate<T: Cropable>: NSObject, UIScrollViewDelega
   }
   
   open func scrollViewDidEndZooming(_ scrollView: UIScrollView, with view: UIView?, atScale scale: CGFloat) {
+    guard isEnabled else { return }
+    
     cropable.willEndZooming()
     cropable.didEndZooming()
   }