Merge pull request #11 from benedom/feature/add-zoom-sensitivity-to-c…

…onfiguration

Added zoom sensitivity to configuration

Demo/SwiftyCropDemo/ContentView.swift

@@ -9,6 +9,7 @@ struct ContentView: View {
     @State private var rotateImage: Bool
     @State private var maxMagnificationScale: CGFloat
     @State private var maskRadius: CGFloat
+    @State private var zoomSensitivity: CGFloat
     @FocusState private var textFieldFocused: Bool
 
     init() {
@@ -17,6 +18,7 @@ struct ContentView: View {
         _rotateImage = State(initialValue: defaultConfiguration.rotateImage)
         _maxMagnificationScale = State(initialValue: defaultConfiguration.maxMagnificationScale)
         _maskRadius = State(initialValue: defaultConfiguration.maskRadius)
+        _zoomSensitivity = State(initialValue: defaultConfiguration.zoomSensitivity)
     }
 
     var body: some View {
@@ -91,6 +93,15 @@ struct ContentView: View {
                         DecimalTextField(value: $maskRadius)
                             .focused($textFieldFocused)
                     }
+
+                    HStack {
+                        Text("Zoom sensitivity")
+
+                            .frame(maxWidth: .infinity, alignment: .leading)
+
+                        DecimalTextField(value: $zoomSensitivity)
+                            .focused($textFieldFocused)
+                    }
                 }
             }
             .toolbar {
@@ -117,7 +128,8 @@ struct ContentView: View {
                         maxMagnificationScale: maxMagnificationScale,
                         maskRadius: maskRadius,
                         cropImageCircular: cropImageCircular,
-                        rotateImage: rotateImage
+                        rotateImage: rotateImage,
+                        zoomSensitivity: zoomSensitivity
                     )
                 ) { croppedImage in
                     // Do something with the returned, cropped image

README.md

@@ -144,14 +144,16 @@ You can also configure `SwiftyCropView` by passing a `SwiftyCropConfiguration`.
 | `maskRadius` | `CGFloat`: The radius of the mask used for cropping. Defaults to `130`. A good way is to make it dependend on the screens size. |
 | `cropImageCircular` | `Bool`: When using the cropping mask `circle`, whether the resulting image should also be masked as circle. Defaults to `false`. |
 | `rotateImage` | `Bool`: Whether the image can be rotated when cropping using pinch gestures. Defaults to `true`. |
+| `zoomSensitivity` | `CGFloat`: Zoom sensitivity when cropping. Increase to make zoom faster / less sensitive. Defaults to `1.0`. |
 
 Create a configuration like this:
 ```swift
 let configuration = SwiftyCropConfiguration(
     maxMagnificationScale = 4.0,
     maskRadius: 130,
     cropImageCircular: false,
-    rotateImage: true
+    rotateImage: true,
+    zoomSensitivity = 1.0
 )
 ```
 and use it like this:

Sources/SwiftyCrop/Models/SwiftyCropConfiguration.swift

@@ -6,6 +6,7 @@ public struct SwiftyCropConfiguration {
     public let maskRadius: CGFloat
     public let cropImageCircular: Bool
     public let rotateImage: Bool
+    public let zoomSensitivity: CGFloat
 
     /// Creates a new instance of `SwiftyCropConfiguration`.
     ///
@@ -18,15 +19,18 @@ public struct SwiftyCropConfiguration {
     ///                            Defaults to `false`.
     ///   - rotateImage: Option to rotate image.
     ///                            Defaults to `true`.
+    ///   - zoomSensitivity: Sensitivity when zooming. Default is `1.0`. Decrease to increase sensitivity.
     public init(
         maxMagnificationScale: CGFloat = 4.0,
         maskRadius: CGFloat = 130,
         cropImageCircular: Bool = false,
-        rotateImage: Bool = true
+        rotateImage: Bool = true,
+        zoomSensitivity: CGFloat = 1
     ) {
         self.maxMagnificationScale = maxMagnificationScale
         self.maskRadius = maskRadius
         self.cropImageCircular = cropImageCircular
         self.rotateImage = rotateImage
+        self.zoomSensitivity = zoomSensitivity
     }
 }

Sources/SwiftyCrop/View/CropView.swift

@@ -32,7 +32,7 @@ struct CropView: View {
     var body: some View {
         let magnificationGesture = MagnificationGesture()
             .onChanged { value in
-                let sensitivity: CGFloat = 0.2
+                let sensitivity: CGFloat = 0.1 * configuration.zoomSensitivity
                 let scaledValue = (value.magnitude - 1) * sensitivity + 1
 
                 let maxScaleValues = viewModel.calculateMagnificationGestureMaxValues()