public ValidateNumberPage()
        {
            cursorLabel = new LabelCustomFont {
                Text = ">"
            };
            entryNumber = new EntryCustomFont {
                HorizontalOptions = LayoutOptions.FillAndExpand,
                Keyboard = Keyboard.Numeric
            };
            entryNumber.Completed += OnNumberEntryCompleted;

            stackLayout = new StackLayout {
                Padding = new Thickness(16),
                Children = {
                    new LabelCustomFont {
                        Text = "ENTER A CREDIT CARD NUMBER:"
                    },
                    new StackLayout {
                        Children = {
                            cursorLabel, entryNumber
                        },
                        Orientation = StackOrientation.Horizontal,
                        Spacing = 0
                    }
                }
            };

            Content = new ScrollView() {
                Content = stackLayout,
                HorizontalOptions = LayoutOptions.FillAndExpand,
                Orientation = ScrollOrientation.Vertical
            };
        }

        public ProjectsPage()
        {
            ProjectsViewModel projectsVM = new ProjectsViewModel();

            var layout = new StackLayout
            {
                Spacing = 0,
                VerticalOptions = LayoutOptions.FillAndExpand
            };

            foreach (Project project in projectsVM.Projects)
            {
                layout.Children.Add(new Label
                {
                    Text = project.title
                });

                layout.Children.Add(new Label
                {
                    Text = project.description
                });

                layout.Children.Add(new Label
                {
                    Text = $"Type: {project.type}"
                });
            }

            Content = new ScrollView
            {
                Content = layout
            };
        }

            public MainPage()
            {
                Label theLabel = new Label() {
                    Text = " click ",
                    HorizontalOptions = LayoutOptions.CenterAndExpand,
                    VerticalOptions = LayoutOptions.CenterAndExpand
                };

                Button theButton = new Button() {
                    Text = "Click Me",
                    HorizontalOptions = LayoutOptions.CenterAndExpand,
                    VerticalOptions = LayoutOptions.CenterAndExpand
                };
                theButton.Clicked +=(sender, e) => {
                    theLabel.Text = string.Format("{0} {1}"," click ",theLabel.Text);
                };

                DatePicker dtPicket = new DatePicker();

                var container = new StackLayout() {
                    Padding = new Thickness(20, Device.OnPlatform(20,0,0),20,20)
                };

                container.Children.Add(dtPicket);
                container.Children.Add(theButton);
                container.Children.Add(theLabel);
                Content = new ScrollView() { Content = container };
            }

		public AbsoluteLayoutPageCode ()
		{
			Title = "AbsoluteLayout - C#";
			BackgroundImage = "deer.jpg";
			var outerLayout = new AbsoluteLayout ();
			var scroll = new ScrollView ();
			outerLayout.Children.Add (scroll, new Rectangle (0, 0, 1, 1), AbsoluteLayoutFlags.All);
			outerLayout.Children.Add (new Button {
				Text = "Previous",
				BackgroundColor = Color.White,
				TextColor = Color.Green,
				BorderRadius = 0
			}, new Rectangle (0, 1, .5, 60), AbsoluteLayoutFlags.PositionProportional | AbsoluteLayoutFlags.WidthProportional);
			outerLayout.Children.Add (new Button {
				Text = "Next",
				BackgroundColor = Color.White,
				TextColor = Color.Green,
				BorderRadius = 0
			}, new Rectangle (1, 1, .5, 60), AbsoluteLayoutFlags.PositionProportional | AbsoluteLayoutFlags.WidthProportional);
			var innerLayout = new AbsoluteLayout ();
			scroll.Content = innerLayout;
			innerLayout.Children.Add (new Image { Source = "deer.jpg" }, new Rectangle (.5, 0, 300, 300), AbsoluteLayoutFlags.PositionProportional);
			innerLayout.Children.Add (new BoxView { Color = Color.FromHex ("#CC1A7019") }, new Rectangle (.5, 300, .7, 50), AbsoluteLayoutFlags.XProportional | AbsoluteLayoutFlags.WidthProportional);
			innerLayout.Children.Add (new Label { Text = "deer.jpg", XAlign = TextAlignment.Center, TextColor = Color.White }, new Rectangle (.5, 310, 1, 50), AbsoluteLayoutFlags.XProportional | AbsoluteLayoutFlags.WidthProportional);
			Content = outerLayout;
		}

		public SlideShowView ()
		{
			HeightRequest = 200;

			var image1 = new Image() {Source = new FileImageSource(){ File = "bama1.jpg"}};
			var image2 = new Image() {Source = new FileImageSource(){ File = "bama2.jpg"}};
			var image3 = new Image() {Source = new FileImageSource(){ File = "bama3.jpg"}};
			var image4 = new Image() {Source = new FileImageSource(){ File = "bama4.jpg"}};
			var image5 = new Image() {Source = new FileImageSource(){ File = "bama5.jpg"}};
			var image6 = new Image() {Source = new FileImageSource(){ File = "bama6.jpg"}};
			var image7 = new Image() {Source = new FileImageSource(){ File = "bama7.jpg"}};
			var image8 = new Image() {Source = new FileImageSource(){ File = "bama8.jpg"}};
			var image9 = new Image() {Source = new FileImageSource(){ File = "bama9.jpg"}};

			var stack = new StackLayout () {
				Padding = new Thickness(0,0,0,10),
				Orientation = StackOrientation.Horizontal,
				Spacing = 10,
				Children = {
					image1,
					image2,
					image3,
					image4,
					image5,
					image6,
					image7,
					image8,
					image9
				}
			};

			Content = new ScrollView() {
				Content = stack, 
				Orientation = ScrollOrientation.Horizontal};
		}

        public MovieDetail(string title, string rate, string poster, string descritption)
        {
            Title =title;

            Label rating = new Label {
                Text = rate,
                FontSize = Device.GetNamedSize(NamedSize.Medium, typeof(Label)),
                HorizontalOptions = LayoutOptions.Center
            };

            Image image = new Image{
                Source=poster,
                HeightRequest = 350,
                WidthRequest = 125
            };

            Label description = new Label {
                Text = descritption,
                FontSize = Device.GetNamedSize(NamedSize.Small, typeof(Label)),
                HorizontalOptions = LayoutOptions.CenterAndExpand,

            };

            StackLayout stackLayout = new StackLayout {
                Children = {rating, image, description}
            };
            ScrollView scroll = new ScrollView{
                Content = stackLayout
            };
            this.Content = scroll;
        }

        public CoursePageDB()
        {
            Padding = new Thickness(10, Device.OnPlatform(20,0,0),10,0);
            BackgroundColor = Color.Gray;

            //this.Title = course.TitleShort;
            this.SetBinding(ContentPage.TitleProperty, "TitleShort");

            var titleLabel = new Label() {/*Text = course.Title,*/ Font = Font.SystemFontOfSize(NamedSize.Large)};
            titleLabel.SetBinding(Label.TextProperty,"Title");

            var authorLabel = new Label() {/*Text = course.Author,*/ Font = Font.SystemFontOfSize(NamedSize.Small)};
            authorLabel.SetBinding(Label.TextProperty,"Author");

            var descriptionLabel = new Label() {/*Text = course.Description,*/ Font = Font.SystemFontOfSize(NamedSize.Medium)};
            descriptionLabel.SetBinding(Label.TextProperty, "Description");

            Content = new ScrollView()
            {
                Content = new StackLayout()
                {
                    Spacing = 10,
                    Children = { titleLabel,authorLabel,descriptionLabel}
                }
            };

        }

        public HomePage(string username)
            : base("HomePage")
        {
            _mainScroll = new ScrollView {
                HorizontalOptions = LayoutOptions.FillAndExpand,
                VerticalOptions = LayoutOptions.FillAndExpand
            };

            this.Content = _mainScroll;

            _mainStack = new StackLayout{
                HorizontalOptions = LayoutOptions.FillAndExpand,
                VerticalOptions = LayoutOptions.FillAndExpand
            };
            _mainScroll.Content = _mainStack;

            _homepageTitle = new Label {
                Text = "Welcome, " + username + "!",
                HorizontalOptions = LayoutOptions.CenterAndExpand
            };
            _mainStack.Children.Add (_homepageTitle);

            _next = new Views.TrackingButton(this.Title) {
                Text = "Next",
                HorizontalOptions = LayoutOptions.CenterAndExpand
            };
            _next.Clicked += Next_Clicked;

            _mainStack.Children.Add (_next);
        }

		public CallPutPage ()
		{
			BackgroundColor = MyColors.MidnightBlue;

			var stackLayout = new StackLayout { 
				Padding = new Thickness (15),
				Children = {
					new Label { 
						Text = "Compare call/put price against $100",
						HorizontalOptions = LayoutOptions.CenterAndExpand,
						FontAttributes = FontAttributes.Bold, 
						TextColor = MyColors.Clouds
					},
					new BoxView{ HeightRequest = 10, Opacity = 0 },
					callValueEntry,
					new BoxView{ HeightRequest = 10, Opacity = 0 },
					putValueEntry,
					new BoxView{ HeightRequest = 10, Opacity = 0 },
					calcuatePayoffButton,
				}
			};

			var scrollView = new ScrollView ();
			scrollView.Content = stackLayout;

			Content = scrollView;

			calcuatePayoffButton.Clicked += CalcuatePayoffButton_Clicked;
		}

        public LoginPage()
        {
            BindingContext = new LoginViewModel(Navigation);

            var layout = new StackLayout { Padding = 10 };

            var label = new Label
            {
                Text = "Login",
                FontSize = Device.GetNamedSize(NamedSize.Large, typeof(Label)),
                TextColor = Color.White,
                VerticalOptions = LayoutOptions.Start,
                HorizontalTextAlignment = TextAlignment.Center,
                VerticalTextAlignment = TextAlignment.Center,
            };

            layout.Children.Add(label);

            var username = new Entry { Placeholder = "Username" };
            username.SetBinding(Entry.TextProperty, LoginViewModel.UsernamePropertyName);
            layout.Children.Add(username);

            var password = new Entry { Placeholder = "Password", IsPassword = true };
            password.SetBinding(Entry.TextProperty, LoginViewModel.PasswordPropertyName);
            layout.Children.Add(password);

            var button = new Button { Text = "Sign In", TextColor = Color.White };
            button.SetBinding(Button.CommandProperty, LoginViewModel.LoginCommandPropertyName);

            layout.Children.Add(button);

            Content = new ScrollView { Content = layout };
        }

        public ConfigSpringboard()
        {
            NavigationPage.SetHasNavigationBar (this, false);

            Grid configGrid = new Grid {
                BackgroundColor = Colours.BG_DARK,
                Padding = new Thickness(10),
                RowDefinitions = {
                    new RowDefinition {
                        Height = new GridLength(150, GridUnitType.Absolute)
                    }
                },
                ColumnDefinitions = {
                    new ColumnDefinition {
                        Width = new GridLength(1, GridUnitType.Star)
                    },
                    new ColumnDefinition {
                        Width = new GridLength(1, GridUnitType.Star)
                    }
                }
            };

            HomeButton UC = new HomeButton (IconLabel.Icon.FAUser, "YOUR INFO", Colours.USERCONFIG_LIGHT, Colours.USERCONFIG_MEDIUM);
            HomeButton AC = new HomeButton (IconLabel.Icon.FABell, "ALERTS CONFIG", Colours.ALERTSCONFIG_LIGHT, Colours.ALERTSCONFIG_MEDIUM);

            var alertConfigTapGestureRecognizer = new TapGestureRecognizer ();
            alertConfigTapGestureRecognizer.Tapped += async (s, e) => {
                if (AC.IsEnabled) {
                    AC.IsEnabled = false;
                    await AC.ScaleTo(.8, 100);
                    await AC.ScaleTo(1, 100);
                    await Navigation.PushAsync (await AlertConfigContainer.CreateAlertConfigContainer());
                    AC.IsEnabled = true;
                }
            };
            AC.GestureRecognizers.Add (alertConfigTapGestureRecognizer);

            var userConfigTapGestureRecognizer = new TapGestureRecognizer ();
            userConfigTapGestureRecognizer.Tapped += async (s, e) => {
                if (UC.IsEnabled) {
                    UC.IsEnabled = false;
                    await UC.ScaleTo(.8, 100);
                    await UC.ScaleTo(1, 100);
                    await Navigation.PushAsync (await YourInfoPageContainer.CreateYourInfoPageContainer());
                    UC.IsEnabled = true;
                }
            };
            UC.GestureRecognizers.Add (userConfigTapGestureRecognizer);

            configGrid.Children.Add (UC, 0, 0);
            configGrid.Children.Add (AC, 1, 0);

            ScrollView scrollView = new ScrollView {
                Orientation = ScrollOrientation.Vertical,
                Content = configGrid,
                VerticalOptions = LayoutOptions.FillAndExpand
            };

            Content = scrollView;
        }

          //private bool _taxaTxtChanged;

          public AddTaxaPage(string title) {    
               var scrollView = new ScrollView();
               var contentStack = new StackLayout {
                    VerticalOptions = LayoutOptions.Start,
                    HorizontalOptions = LayoutOptions.Start
               };
               _taxaStack = new StackLayout {
                    Orientation = StackOrientation.Vertical,
                    HorizontalOptions = LayoutOptions.FillAndExpand
               };

               var numLabel = new Label { Text = "Enter Number of Taxa:" };
               _numEntry = new Entry { WidthRequest = 50 };
               _numEntry.Completed += NumTaxa_OnCompleted;
               _numEntry.Keyboard = Keyboard.Numeric;
               _numEntry.BindingContext = new EntryRestrictions();
               _numEntry.SetBinding(Entry.TextProperty, "Num1To99");
               contentStack.Children.Add(numLabel);
               contentStack.Children.Add(_numEntry);
               _noteLabel = new Label { Text = "These are the organisms you will be comparing." };
               contentStack.Children.Add(_noteLabel);
               contentStack.Children.Add(_taxaStack);
               _addTaxaBtn.Clicked += OnAddTaxa;
               _addTaxaBtn.BackgroundColor = Color.Accent;
               _addTaxaBtn.IsEnabled = false;
               _addTaxaBtn.IsVisible = false;
               contentStack.Children.Add(_addTaxaBtn);

               scrollView.Content = contentStack;
               Content = scrollView;
               Title = title;
          }

		public CameraView ()
		{
			done = false;
			this.layout = new StackLayout{ Padding = 10 };

			btn = new Button ();
			btn1 = new Button ();
			btn2 = new Button ();

			btn.Text = "Take picture";
			btn1.Text = " Select Picture";
			btn2.Text = "Add ticket";

			imgByte = null;
			_imageSource = new Image ();
			_imageSource.Aspect = Aspect.AspectFill; 

			layout.Children.Add (btn);
			layout.Children.Add (btn1);
			layout.Children.Add (_imageSource);

			btn.Clicked+= Btn_Clicked;
			btn1.Clicked+= Btn1_Clicked;
			btn2.Clicked+= Btn2_Clicked;



			Content = new ScrollView { Content = layout };
		}

        public GameDetailPage()
        {
            Content = new ScrollView () {

                Content = new StackLayout () {

                    Padding = new Thickness(0,0,0,30),
                    Orientation = StackOrientation.Vertical,
                    VerticalOptions = LayoutOptions.Start,

                    Children = {
                        Picture (),
                        Space(),
                        GameName(),
                        HorzLine (),
                        GamePrice (),
                        HorzLine (),
                        GameCount (),
                        Space2 (),
                        GameMenu (),TotalGamePicker (),
                        AddtoCartButton ()

                    }
                }
            };
        }

        private void RenderContent()
        {
            ScrollView scrollview = new ScrollView() { HorizontalOptions = LayoutOptions.FillAndExpand, VerticalOptions = LayoutOptions.FillAndExpand};
            var rootLayout = new StackLayout() { BackgroundColor = Color.Black, Spacing = 15, Orientation = StackOrientation.Vertical, HorizontalOptions = LayoutOptions.FillAndExpand, Padding = new Thickness(0, 0, 0, 10) }; // Padding = new Thickness(45, 15, 45, 15),

            ContentView header = new ContentView() { BackgroundColor = Color.Black, HorizontalOptions = LayoutOptions.FillAndExpand, Padding = new Thickness(0, 80, 0, 0) };
            rootLayout.Children.Add(header);

            btnGoogleLogIn = new Button() {
                Text = " LOG IN WITH GOOGLE ",
                FontAttributes = FontAttributes.Bold,
                BackgroundColor = Color.Green,
                TextColor = Color.White,
                HorizontalOptions = LayoutOptions.Center
            };
            rootLayout.Children.Add(btnGoogleLogIn);

            scrollview.Content = rootLayout;

            if (Device.OS == TargetPlatform.Android)
            {
                scrollview.IsClippedToBounds = true;
            }

            Content = scrollview;
        }

		public SoldCars()
		{
			InitializeComponent();

			manager = CarItemManager.DefaultManager;

			var instructionStack = new StackLayout () { BackgroundColor = Color.FromHex(ThemeColors.PrimaryDark), Padding=new Thickness (15, 15, 15, 15)};

			var instructionLabel = new Label () {
				Text = "Click on an Entry for Details",
				FontSize = Device.GetNamedSize (NamedSize.Large, typeof(Label)),
				TextColor=Color.FromHex(ThemeColors.TextIcons)
			}; 
			instructionStack.Children.Add (instructionLabel);

			var scrollview = new ScrollView
			{
				Content = new StackLayout
				{
					Children = { instructionStack, todoList },
				},
			};

			var outerStack = new StackLayout(); outerStack.Children.Add(scrollview);

			Content = outerStack;
		}

 public StartPage()
 {
     Title = "DataSave Sample";
     Padding = 16;
     Content = new ScrollView
     {
         Content = new StackLayout
         {
             Spacing = 10,
             Children = {
                 new Button { Text = "Save to dictionay (C#)",
                     Command = new Command(async ()=> await Navigation.PushAsync(new SaveToDictionaryCS()))
                 },
                 new Button { Text = "Save to dic by ViewModel (C#)",
                     Command = new Command(async () => await Navigation.PushAsync(new SaveByVMCS()))
                 },
                 new Button { Text = "Save to dic by ViewModel (Xaml)",
                     Command = new Command(async () => await Navigation.PushAsync(new SaveByVMXaml()))
                 },
                 new Button { Text = "Save to json (C#)",
                     Command = new Command(async () => await Navigation.PushAsync(new SaveToJsonCS()))
                 },
                 new Button { Text = "Save to json (Xaml)",
                     Command = new Command(async () => await Navigation.PushAsync(new SaveToJsonXaml()))
                 },
             }
         }
     };
 }

        public TrackingPage()
        {
            Title = "Tracking";

            Padding = new Thickness (20, 20, 20, 20);

            locationLabel = new Label {
                Text = "Location",
                HorizontalOptions = LayoutOptions.CenterAndExpand,

            };

            directionLabel = new Label {
                Text = "Direction",
                HorizontalOptions = LayoutOptions.CenterAndExpand,
                VerticalOptions = LayoutOptions.CenterAndExpand,
                Font = Font.SystemFontOfSize(14)
            };

            var layout = new StackLayout {
                Children = { locationLabel, directionLabel }
            };

            var scroll = new ScrollView () {
                Content = layout
            };

            Content = scroll;

            var timer = new Timer (1000);
            timer.Elapsed += OnTimerElapsed;
            timer.Start ();
        }

        public AboutPage()
        {
            Title = "Informacoes";
            //			GetValue ();

            var stack = new StackLayout {

                VerticalOptions = LayoutOptions.FillAndExpand,
                Children = {
                    lbInformation
                }
            };

            var scroll = new ScrollView {
                BackgroundColor = Colors.BackgroundDefault,
                Content = stack
            };

            var absoluteLayout = new AbsoluteLayout ();
            var background = new Image {
                Style = Styles.BackgroundImage
            };

            absoluteLayout.Children.Add (background, new Rectangle (0, 0, 1, 1), AbsoluteLayoutFlags.All);
            absoluteLayout.Children.Add (scroll, new Rectangle (0, 0, 1, 1), AbsoluteLayoutFlags.All);

            Content = absoluteLayout;
        }

 public static void SetupStepView(RelativeLayout rLayout, ScrollView helpSv, StackLayout questionContainer, Command questionTappedCmd)
 {
     var tgr = new TapGestureRecognizer()
     {
         Command = new Command((obj) =>
         {
             var oldBound = helpSv.Bounds;
             if (oldBound.Height == 40)
             {
                 // Need to show.
                 var newBound = new Rectangle(0, rLayout.Height - 200, rLayout.Width, 200);
                 helpSv.LayoutTo(newBound, 250, Easing.CubicInOut);
             }
             else
             {
                 // Need to hide.
                 var newBound = new Rectangle(0, rLayout.Height - 40, rLayout.Width, 40);
                 helpSv.LayoutTo(newBound, 250, Easing.CubicInOut);
             }
         })
     };
     helpSv.GestureRecognizers.Add(tgr);
     var qControls = questionContainer.Children.Where(x => x is QuestionLayout).Cast<QuestionLayout>();
     var currIdx = 0;
     foreach (var qControl in qControls)
     {
         var questionTgr = new TapGestureRecognizer()
         {
             Command = questionTappedCmd,
             CommandParameter = currIdx,
         };
         qControl.GestureRecognizers.Add(questionTgr);
         currIdx++;
     }
 }