prs/prs.mobile.new/PRS.Mobile/CustomControls/DateSelector/DateButton.xaml.cs

using System;
using System.Globalization;
using InABox.Core;
using Syncfusion.XForms.PopupLayout;

using Xamarin.Forms;
using Xamarin.Forms.Xaml;
using XF.Material.Forms.Resources.Typography;

namespace PRS.Mobile
{
    
    public class DateButtonChangedArgs : EventArgs
    {
        public DateTime Date { get; private set; }

        public DateButtonChangedArgs(DateTime date)
        {
            Date = date;
        }
    }
    
    public delegate void DateButtonChanged(object sender, DateButtonChangedArgs args);

    public class DateTimeFormatter : IValueConverter
    {
        public String Prefix { get; set; }
        public String Format { get; set; }
        public String Prompt { get; set; }
        
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {
            if ((value is DateTime date) && (!date.IsEmpty()))
            {
                String fmt = "{0} {1:" + Format + "}";
                return String.Format(fmt,Prefix,date).Trim();
            }
            return Prompt;
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {
            throw new NotImplementedException();
        }

        public DateTimeFormatter()
        {
            Prompt = "Select Date:";
            Format = "dd MMMM yy";
            Prefix = "";
        }
    }
    
    [XamlCompilation(XamlCompilationOptions.Compile)]
    public partial class DateButton
    {
        private SfPopupLayout popup;
        
        public event DateButtonChanged Changed;
        
        public static readonly BindableProperty PromptProperty = BindableProperty.Create(
            nameof(Prompt), 
            typeof(String), 
            typeof(DateButton));
        
        public String Prompt
        {
            get => (String)GetValue(PromptProperty);
            set
            {
                SetValue(PromptProperty, value);
                _datetimeformatter.Prompt = value;
            }
        }

        public static readonly BindableProperty PrefixProperty = BindableProperty.Create(
            nameof(Prefix), 
            typeof(String), 
            typeof(DateButton));
        
        public String Prefix
        {
            get => (String)GetValue(PrefixProperty);
            set
            {
                SetValue(PrefixProperty, value);
                _datetimeformatter.Prefix = value;
            }
        }

        public static readonly BindableProperty FormatProperty = BindableProperty.Create(
            nameof(Format), 
            typeof(String), 
            typeof(DateButton));
        
        public String Format
        {
            get => (String)GetValue(FormatProperty);
            set
            {
                SetValue(FormatProperty, value); 
                _datetimeformatter.Format = value;
            }
        }

        public static readonly BindableProperty DateProperty = BindableProperty.Create(
            nameof(Date), 
            typeof(DateTime), 
            typeof(DateButton));
        
        public DateTime Date
        {
            get => (DateTime)GetValue(DateProperty);
            set => SetValue(DateProperty,value);
        }
        
        public static readonly BindableProperty TextColorProperty = BindableProperty.Create(
            nameof(TextColor),
            typeof(Color),
            typeof(DateButton),
            XF.Material.Forms.Material.Color.OnSecondary);

        public Color TextColor
        {
            get => (Color)GetValue(TextColorProperty);
            set => SetValue(TextColorProperty, value);
        }
        
        public static readonly BindableProperty TypeScaleProperty = BindableProperty.Create(
            nameof(TypeScale), 
            typeof(MaterialTypeScale), 
            typeof(DateButton), 
            MaterialTypeScale.Button);
        
        public MaterialTypeScale TypeScale
        {
            get => (MaterialTypeScale)GetValue(TypeScaleProperty);
            set => SetValue(TypeScaleProperty, value);
        }
        
        public static readonly BindableProperty ButtonColorProperty = BindableProperty.Create(
            nameof(ButtonColor),
            typeof(Color),
            typeof(DateButton),
            XF.Material.Forms.Material.Color.Secondary);

        public Color ButtonColor
        {
            get => (Color)GetValue(ButtonColorProperty);
            set => SetValue(ButtonColorProperty, value);
        }

        public static readonly BindableProperty BorderColorProperty = BindableProperty.Create(
            nameof(BorderColor),
            typeof(Color),
            typeof(DateButton),
            XF.Material.Forms.Material.Color.SecondaryVariant);

        public Color BorderColor
        {
            get => (Color)GetValue(BorderColorProperty);
            set => SetValue(BorderColorProperty, value);
        }
        
        // public static readonly BindableProperty PaddingProperty = BindableProperty.Create(
        //     nameof(Padding),
        //     typeof(Thickness),
        //     typeof(DateButton),
        //     new Thickness(5));
        //
        // public new Thickness Padding
        // {
        //     get => (Thickness)GetValue(PaddingProperty);
        //     set => SetValue(PaddingProperty, value);
        // }
        
        public DateButton()
        {
            InitializeComponent();
            popup = new SfPopupLayout();
        }

        private void _frame_OnClicked(object sender, EventArgs e)
        {
            popup.PopupView.WidthRequest = 300;
            popup.PopupView.HeightRequest = 500;
            popup.PopupView.ShowHeader = false;
            popup.PopupView.ShowFooter = false;
            DateSelector popupContent = new DateSelector();
            popupContent.Date = Date;
            popupContent.DateChanged += (o, args) =>
            {
                Date = args.Date;
                Changed?.Invoke(this,new DateButtonChangedArgs(Date));
            };
            popupContent.Margin = new Thickness(10);
            popupContent.HorizontalOptions = LayoutOptions.Fill;
            popupContent.VerticalOptions = LayoutOptions.Fill;
            popup.PopupView.ContentTemplate = new DataTemplate(() => popupContent);
            popup.Show();
        }

    }
}