using System;

using Xamarin.Forms;

namespace one
{
    public class TwoButtonPage : ContentPage
    {
        Button addButton, removeButton;
        StackLayout loggerLayout = new StackLayout();

        public TwoButtonPage()
        {
            addButton = new Button { 
                Text = "Add",
                HorizontalOptions = LayoutOptions.CenterAndExpand
            };
            addButton.Clicked += OnButtonClicked;

            removeButton = new Button { 
                Text = "Remove",
                HorizontalOptions = LayoutOptions.CenterAndExpand,
                IsEnabled = false
            };
            removeButton.Clicked += OnButtonClicked;

            switch (Device.RuntimePlatform) {
                case Device.iOS:
                    this.Padding = new Thickness(5, 20, 5, 5);
                    break;
            }

            this.Content = new StackLayout
            {
                Children = { 
                    new StackLayout {
                        Orientation = StackOrientation.Horizontal,
                        Children = {
                            addButton,
                            removeButton
                        }
                    },
                    new ScrollView {
                        VerticalOptions = LayoutOptions.FillAndExpand,
                        Content = loggerLayout
                    }
                }
            };
        }

        void OnButtonClicked(object sender, EventArgs args) {
            Button button = (Button)sender;
            if (button == addButton) {
                loggerLayout.Children.Add(new Label {
                    Text = "Button clicked at " + DateTime.Now.ToString("T")
                });
            } else {
                loggerLayout.Children.RemoveAt(0);
            }

            removeButton.IsEnabled = loggerLayout.Children.Count > 0;
        }
    }
}