taler-ios

iOS apps for GNU Taler (wallet)
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View+innerSize.swift (3342B)

      1 /* MIT License
      2  * Copyright (c) 2023 mevmev, Rahul Bir + Michal Šrůtek, jnpdx
      3  * https://stackoverflow.com/questions/74471576/make-sheet-the-exact-size-of-the-content-inside
      4  *
      5  * Permission is hereby granted, free of charge, to any person obtaining a copy
      6  * of this software and associated documentation files (the "Software"), to deal
      7  * in the Software without restriction, including without limitation the rights
      8  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
      9  * copies of the Software, and to permit persons to whom the Software is
     10  * furnished to do so, subject to the following conditions:
     11  *
     12  * The above copyright notice and this permission notice shall be included in all
     13  * copies or substantial portions of the Software.
     14  *
     15  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     16  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     17  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
     18  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     19  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     20  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     21  * SOFTWARE.
     22  */
     23 /**
     24  * @author Marc Stibane
     25  */
     26 import SwiftUI
     27 
     28 fileprivate struct InnerHeightKey: PreferenceKey {
     29     static var defaultValue: CGFloat { 10 }
     30     static func reduce(value: inout CGFloat, nextValue: () -> CGFloat) {
     31         value = nextValue()
     32     }
     33 }
     34 
     35 fileprivate struct InnerWidthKey: PreferenceKey {
     36     static var defaultValue: CGFloat { 10 }
     37     static func reduce(value: inout CGFloat, nextValue: () -> CGFloat) {
     38         value = nextValue()
     39     }
     40 }
     41 
     42 fileprivate struct InnerSizeKey: PreferenceKey {
     43     static var defaultValue: CGSize { CGSize(width: 10, height: 10) }
     44     static func reduce(value: inout CGSize, nextValue: () -> CGSize) {
     45         value = nextValue()
     46     }
     47 }
     48 
     49 extension View {
     50     func innerHeight(_ height: Binding<CGFloat>) -> some View {
     51         overlay {      // background doesn't work for sheets
     52             GeometryReader { proxy in
     53                 Color.clear
     54                     .preference(key: InnerHeightKey.self, value: proxy.size.height)
     55             }
     56         }
     57         .onPreferenceChange(InnerHeightKey.self) { newValue in
     58 // print("❗️InnerHeight \(newValue)❗️")
     59             height.wrappedValue = newValue
     60         }
     61     }
     62 
     63     func innerWidth(_ width: Binding<CGFloat>) -> some View {
     64         overlay {      // background doesn't work for sheets
     65             GeometryReader { proxy in
     66                 Color.clear
     67                     .preference(key: InnerWidthKey.self, value: proxy.size.width)
     68             }
     69         }
     70         .onPreferenceChange(InnerWidthKey.self) { newValue in
     71 //  print("❗️InnerWidth \(newValue)❗️")
     72             width.wrappedValue = newValue
     73         }
     74     }
     75 
     76     func innerSize(_ size: Binding<CGSize>) -> some View {
     77         overlay {      // background doesn't work for sheets
     78             GeometryReader { proxy in
     79                 Color.clear
     80                     .preference(key: InnerSizeKey.self, value: proxy.size)
     81             }
     82         }
     83         .onPreferenceChange(InnerSizeKey.self) { newValue in
     84 //  print("❗️InnerSize \(newValue)❗️")
     85             size.wrappedValue = newValue
     86         }
     87     }
     88 }