Taby.swift

//
//  Taby.swift
//

import SwiftUI
import PencilKit

import Foundation
import SwiftUI
import PencilKit
import VisionKit
import Vision

struct TabyCanvasView: UIViewRepresentable {
    let canvas = PKCanvasView()

    @Environment(\.undoManager) var undoManager

    func makeUIView(context: Context) -> PKCanvasView {
        canvas.isOpaque = false
        canvas.backgroundColor = UIColor.red
        canvas.drawingPolicy = .anyInput
        return canvas
    }

    func updateUIView(_ uiView: PKCanvasView, context: Context) {
        uiView.delegate = context.coordinator
        context.coordinator.toolPicker.addObserver(uiView)
        context.coordinator.toolPicker.setVisible(true, forFirstResponder: uiView)
    }

    func makeCoordinator() -> TabyCoordinator {
        return TabyCanvasView.TabyCoordinator(self)
    }
    
    class TabyCoordinator: NSObject, PKCanvasViewDelegate {
        var toolPicker = PKToolPicker()
        var parent: TabyCanvasView

        init(_ uiView: TabyCanvasView) {
            self.parent = uiView
        }
        
        func canvasViewDidBeginUsingTool(_ canvasView: PKCanvasView) {
        }

        func canvasViewDidEndUsingTool(_ canvasView: PKCanvasView) {
        }
        
        func canvasViewDrawingDidChange(_ canvasView: PKCanvasView) {
        }
        
        func canvasViewDidFinishRendering(_ canvasView: PKCanvasView) {
            
        }
    }
}


struct Taby: View {
    let placement: ToolbarItemPlacement = .destructiveAction
    var body: some View {
        VStack {
            VStack() {
                Text("Hello, World!")
                Button("Button 1") {
                    print("Clicked 1")
                }
                Button("Button 2") {
                    print("Clicked 2")
                }
                Button("Button 3") {
                    print("Clicked 3")
                }
            }
            ScrollView {
                TabyCanvasView()
                    .frame(width: /*@START_MENU_TOKEN@*/100/*@END_MENU_TOKEN@*/, height: 2000, alignment: /*@START_MENU_TOKEN@*/.center/*@END_MENU_TOKEN@*/)
            }
        }
    }
}

struct Taby_Previews: PreviewProvider {
    static var previews: some View {
        Taby()
    }
}