using System;
using Xamarin.Forms;

namespace FormsGallery
{
    class GridDemoPage : ContentPage
    {
        public GridDemoPage()
        {
            Grid grid = new Grid
            {
                VerticalOptions = LayoutOptions.FillAndExpand,
                RowDefinitions = 
                {
                    new RowDefinition { Height = GridLength.Auto },
                    new RowDefinition { Height = GridLength.Auto },
                    new RowDefinition { Height = new GridLength(1, GridUnitType.Star) },
                    new RowDefinition { Height = new GridLength(100, GridUnitType.Absolute) }
                },
                ColumnDefinitions = 
                {
                    new ColumnDefinition { Width = GridLength.Auto },
                    new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) },
                    new ColumnDefinition { Width = new GridLength(100, GridUnitType.Absolute) }
                }
            };

            grid.Children.Add(new Label
                {
                    Text = "Grid",
                    Font = Font.BoldSystemFontOfSize(50),
                    HorizontalOptions = LayoutOptions.Center
                }, 0, 3, 0, 1);

            grid.Children.Add(new Label
                {
                    Text = "Autosized cell",
                    TextColor = Color.White,
                    BackgroundColor = Color.Blue
                }, 0, 1);

            grid.Children.Add(new BoxView
                {
                    Color = Color.Silver,
                    HeightRequest = 0
                }, 1, 1);

            grid.Children.Add(new BoxView
                {
                    Color = Color.Teal
                }, 0, 2);

            grid.Children.Add(new Label
                {
                    Text = "Leftover space",
                    TextColor = Color.Purple,
                    BackgroundColor = Color.Aqua,
                    XAlign = TextAlignment.Center,
                    YAlign = TextAlignment.Center,
                }, 1, 2);

            grid.Children.Add(new Label
                {
                    Text = "Span two rows (or more if you want)",
                    TextColor = Color.Yellow,
                    BackgroundColor = Color.Navy,
                    XAlign = TextAlignment.Center,
                    YAlign = TextAlignment.Center
                }, 2, 3, 1, 3);

            grid.Children.Add(new Label
                {
                    Text = "Span 2 columns",
                    TextColor = Color.Blue,
                    BackgroundColor = Color.Yellow,
                    XAlign = TextAlignment.Center,
                    YAlign = TextAlignment.Center
                }, 0, 2, 3, 4);

            grid.Children.Add(new Label
                {
                    Text = "Fixed 100x100",
                    TextColor = Color.Aqua,
                    BackgroundColor = Color.Red,
                    XAlign = TextAlignment.Center,
                    YAlign = TextAlignment.Center
                }, 2, 3);

            // Accomodate iPhone status bar.
            this.Padding = new Thickness(10, Device.OnPlatform(20, 0, 0), 10, 5);

            // Build the page.
            this.Content = grid;
        }
    }
}