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✨ Implement custom version of interactiveDismissDisabled
This enables us to detect when the user wants to dismiss the sheet, and ask them if they want to discard their changes. Signed-off-by: Peter Friese <[email protected]>
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code/frontend/MakeItSo/Shared/Extensions/View+InteractiveDismissDisable.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,69 @@ | ||
| // | ||
| // View+InteractiveDismissDisable.swift | ||
| // MakeItSo (iOS) | ||
| // | ||
| // Created by Peter Friese on 25.11.21. | ||
| // Copyright © 2021 Google LLC. All rights reserved. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http:https://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
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| import SwiftUI | ||
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| struct InteractiveDismissableView<T: View>: UIViewControllerRepresentable { | ||
| let view: T | ||
| let isDisabled: Bool | ||
| let onAttemptToDismiss: (() -> Void)? | ||
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| func makeUIViewController(context: Context) -> UIHostingController<T> { | ||
| UIHostingController(rootView: view) | ||
| } | ||
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| func updateUIViewController(_ uiViewController: UIHostingController<T>, context: Context) { | ||
| context.coordinator.dismissableView = self | ||
| uiViewController.rootView = view | ||
| uiViewController.parent?.presentationController?.delegate = context.coordinator | ||
| } | ||
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| func makeCoordinator() -> Coordinator { | ||
| Coordinator(self) | ||
| } | ||
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| class Coordinator: NSObject, UIAdaptivePresentationControllerDelegate { | ||
| var dismissableView: InteractiveDismissableView | ||
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| init(_ dismissableView: InteractiveDismissableView) { | ||
| self.dismissableView = dismissableView | ||
| } | ||
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| func presentationControllerShouldDismiss(_ presentationController: UIPresentationController) -> Bool { | ||
| !dismissableView.isDisabled | ||
| } | ||
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| func presentationControllerDidAttemptToDismiss(_ presentationController: UIPresentationController) { | ||
| dismissableView.onAttemptToDismiss?() | ||
| } | ||
| } | ||
| } | ||
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| extension View { | ||
| public func interactiveDismissDisabled(_ isDisabled: Bool = true, onAttemptToDismiss: (() -> Void)? = nil) -> some View { | ||
| InteractiveDismissableView(view: self, isDisabled: isDisabled, onAttemptToDismiss: onAttemptToDismiss) | ||
| } | ||
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| public func interactiveDismissDisabled(_ isDisabled: Bool = true, attemptToDismiss: Binding<Bool>) -> some View { | ||
| InteractiveDismissableView(view: self, isDisabled: isDisabled) { | ||
| attemptToDismiss.wrappedValue.toggle() | ||
| } | ||
| } | ||
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| } |
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