linphone-ios/Linphone/UI/Welcome/WelcomeView.swift

/*
 * Copyright (c) 2010-2023 Belledonne Communications SARL.
 *
 * This file is part of Linphone
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */

import SwiftUI

struct WelcomeView: View {
	
	@ObservedObject var sharedMainViewModel: SharedMainViewModel
	
	@State private var index = 0
	
	var body: some View {
		NavigationView {
			GeometryReader { geometry in
				ScrollView {
					VStack {
						ZStack {
							Image("mountain")
								.resizable()
								.scaledToFill()
								.frame(width: geometry.size.width, height: 100)
								.clipped()
							
							VStack(alignment: .trailing) {
								NavigationLink(destination: {
									PermissionsFragment(sharedMainViewModel: sharedMainViewModel)
								}, label: {
									Text("Skip")
										.underline()
										.default_text_style_600(styleSize: 15)
									
								})
								.padding(.top, -35)
								.padding(.trailing, 20)
								.simultaneousGesture(
									TapGesture().onEnded {
										self.index = 2
									}
								)
								Text("Welcome")
									.welcome_text_style_white_800(styleSize: 35)
									.padding(.trailing, 100)
									.frame(width: geometry.size.width)
									.padding(.bottom, -25)
								Text("to Linphone")
									.welcome_text_style_white_800(styleSize: 25)
									.padding(.leading, 100)
									.frame(width: geometry.size.width)
									.padding(.bottom, -10)
							}
							.frame(width: geometry.size.width)
						}
						.padding(.top, 35)
						.padding(.bottom, 10)
						
						Spacer()
						
						VStack {
							TabView(selection: $index) {
								ForEach((0..<3), id: \.self) { index in
									if index == 0 {
										WelcomePage1Fragment()
									} else if index == 1 {
										WelcomePage2Fragment()
									} else if index == 2 {
										WelcomePage3Fragment()
									} else {
										WelcomePage1Fragment()
									}
								}
							}
							.tabViewStyle(PageTabViewStyle(indexDisplayMode: .always))
							.frame(minHeight: 300)
							.onAppear {
								setupAppearance()
							}
						}
						
						Spacer()
						
						if index == 2 {
							NavigationLink(destination: {
								PermissionsFragment(sharedMainViewModel: sharedMainViewModel)
							}, label: {
								Text("Start")
									.default_text_style_white_600(styleSize: 20)
									.frame(height: 35)
									.frame(maxWidth: .infinity)
								
							})
							.padding(.horizontal, 20)
							.padding(.vertical, 10)
							.background(Color.orangeMain500)
							.cornerRadius(60)
							.padding(.horizontal)
							.padding(.bottom, geometry.safeAreaInsets.bottom.isEqual(to: 0.0) ? 20 : 0)
							.frame(maxWidth: sharedMainViewModel.maxWidth)
						} else {
							Button(action: {
								withAnimation {
									index += 1
								}
							}, label: {
								Text("Next")
									.default_text_style_white_600(styleSize: 20)
									.frame(height: 35)
									.frame(maxWidth: .infinity)
							})
							.padding(.horizontal, 20)
							.padding(.vertical, 10)
							.background(Color.orangeMain500)
							.cornerRadius(60)
							.padding(.horizontal)
							.padding(.bottom, geometry.safeAreaInsets.bottom.isEqual(to: 0.0) ? 20 : 0)
							.frame(maxWidth: sharedMainViewModel.maxWidth)
						}
					}
					.frame(minHeight: geometry.size.height)
				}
			}
		}
	}
	
	func setupAppearance() {
		UIPageControl.appearance().currentPageIndicatorTintColor = UIColor(Color.orangeMain500)
		if #available(iOS 16.0, *) {
			
			let dotCurrentImage = UIImage(named: "current-dot")
			let dotImage = UIImage(named: "dot")
			
			UIPageControl.appearance().setCurrentPageIndicatorImage(dotCurrentImage, forPage: 0)
			UIPageControl.appearance().setCurrentPageIndicatorImage(dotCurrentImage, forPage: 1)
			UIPageControl.appearance().setCurrentPageIndicatorImage(dotCurrentImage, forPage: 2)
			
			UIPageControl.appearance().setIndicatorImage(dotImage, forPage: 0)
			UIPageControl.appearance().setIndicatorImage(dotImage, forPage: 1)
			UIPageControl.appearance().setIndicatorImage(dotImage, forPage: 2)
		}
		UIPageControl.appearance().pageIndicatorTintColor = UIColor(Color.grayMain2c200)
	}
}

#Preview {
	WelcomeView(sharedMainViewModel: SharedMainViewModel())
}