Add a onDrag callback

ChartUI.podspec

@@ -1,7 +1,7 @@
 Pod::Spec.new do |spec|
 
   spec.name         = "ChartUI"
-  spec.version      = "0.4.0"
+  spec.version      = "0.5.0"
   spec.summary      = "📈 A SwiftUI chart library"
   spec.homepage     = "https://github.com/theo-brlle/chart-ui"
   spec.license      = { :type => "MIT", :file => "LICENSE" }

README.md

@@ -15,7 +15,7 @@ Just add this repo as a dependency of your project. Here is the repo URL: https:
 Add ChartUI as a dependency in your `Podfile`.
 
 ```
-pod 'ChartUI', '~> 0.4.0'
+pod 'ChartUI', '~> 0.5.0'
 ```
 
 Then run `pod install` and open the `.xcworkspace` file in Xcode.

Sources/ChartUI/LineChart/ViewModels/LineChartViewModel.swift

@@ -25,6 +25,10 @@ final class LineChartViewModel: ObservableObject {
     @Published var plotDetailsViewSize: CGSize = .zero
     @Published var rightLabelsViewSize: CGSize = .zero
 
+    // MARK: - Callbacks
+
+    var onDragAction: ((Bool) -> Void)?
+
     // MARK: - Computed properties
 
     var chartColor: Color {

Sources/ChartUI/LineChart/Views/LineChartView.swift

@@ -238,20 +238,35 @@ private extension LineChartView {
     var dragGesture: some Gesture {
         DragGesture(minimumDistance: 0)
             .onChanged { value in
+                if !viewModel.isPlotDetailsViewPresented {
+                    viewModel.onDragAction?(true)
+                }
+
                 withAnimation {
                     viewModel.isPlotDetailsViewPresented = true
                 }
 
                 viewModel.updateSelectedPlot(from: value.location.x)
             }
             .onEnded { value in
+                viewModel.onDragAction?(false)
+
                 withAnimation {
                     viewModel.isPlotDetailsViewPresented = false
                 }
             }
     }
 }
 
+// MARK: - Callbacks
+
+public extension LineChartView {
+    func onDrag(_ action: @escaping (Bool) -> Void) -> Self {
+        self.viewModel.onDragAction = action
+        return self
+    }
+}
+
 // MARK: - Previews
 
 struct LineChartView_Previews: PreviewProvider {