80 lines
2.4 KiB
Swift
80 lines
2.4 KiB
Swift
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//
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// PhotoTumbnailView.swift
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// Swipe That Pic
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//
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// Created by Amine Bou on 27/07/2024.
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//
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import Foundation
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import Photos
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import SwiftUI
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struct BigPicture: View {
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private var image: Image
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@State var scale = 1.0
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@State var lastScale = 0.0
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@State var offset: CGSize = .zero
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@State var lastOffset: CGSize = .zero
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init(image: Image) {
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self.image = image
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}
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var body: some View {
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GeometryReader { proxy in
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image
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.resizable()
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.scaledToFill()
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.scaleEffect(scale)
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.offset(offset)
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.frame(width: proxy.size.width, height: proxy.size.height)
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.gesture(
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MagnificationGesture(minimumScaleDelta: 0)
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.onChanged({ value in
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withAnimation(.interactiveSpring()) {
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scale = handleScaleChange(value)
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}
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})
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.onEnded({ _ in
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lastScale = scale
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}).simultaneously(
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with: DragGesture(minimumDistance: 0)
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.onChanged({ value in
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withAnimation(.interactiveSpring()) {
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offset = handleOffsetChange(value.translation)
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}
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})
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.onEnded({ _ in
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lastOffset = offset
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})
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).simultaneously(with: TapGesture(count: 2).onEnded({ Void in
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scale = 1.0
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lastScale = 0.0
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offset = .zero
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lastOffset = .zero
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}))
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)
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}
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// We'll also make sure that the photo will
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// be square
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.aspectRatio(1, contentMode: .fit)
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}
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private func handleScaleChange(_ zoom: CGFloat) -> CGFloat {
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lastScale + zoom - (lastScale == 0 ? 0 : 1)
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}
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private func handleOffsetChange(_ offset: CGSize) -> CGSize {
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var newOffset: CGSize = .zero
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newOffset.width = offset.width + lastOffset.width
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newOffset.height = offset.height + lastOffset.height
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return newOffset
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}
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}
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