using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Input;

namespace XGL.Tools
{
    public class UserDatePicker : DatePicker
    {
        //日期文本框
        private DatePickerTextBox textBox;
        private Popup popup;
        //今天
        private TextBlock goToday;
        //清空
        private TextBlock goClear;

        #region 重载初始化
        public override void OnApplyTemplate()
        {
            base.OnApplyTemplate();
            textBox = this.GetTemplateChild("PART_TextBox") as DatePickerTextBox;
            popup = this.GetTemplateChild("PART_Popup") as Popup;
            popup.Width = 300;
            popup.Height = 300;
            if (AlternativeCalendarStyle != null)
            {
                System.Windows.Controls.Calendar calendar = popup.Child as System.Windows.Controls.Calendar;
                calendar.Style = AlternativeCalendarStyle;
                calendar.ApplyTemplate();
                goToday = calendar.Template.FindName("PART_GoToday", calendar) as TextBlock;
                if (goToday != null)
                {
                    goToday.MouseLeftButtonUp -= new MouseButtonEventHandler(goToday_MouseLeftButtonUp);
                    goToday.MouseLeftButtonUp += new MouseButtonEventHandler(goToday_MouseLeftButtonUp);
                }
                goClear = calendar.Template.FindName("PART_GoClear", calendar) as TextBlock;
                if (goClear != null)
                {
                    goClear.MouseLeftButtonUp -= new MouseButtonEventHandler(goClear_MouseLeftButtonUp);
                    goClear.MouseLeftButtonUp += new MouseButtonEventHandler(goClear_MouseLeftButtonUp);
                }
            }
            this.SelectedDateFormat = DatePickerFormat.Short;

        }
        #endregion

        /// <summary>
        /// AlternativeCalendarStyle Dependency Property
        /// </summary>
        public static readonly DependencyProperty AlternativeCalendarStyleProperty =
            DependencyProperty.Register("AlternativeCalendarStyle", typeof(Style), typeof(UserDatePicker),
                new FrameworkPropertyMetadata((Style)null,
                    null));


        public Style AlternativeCalendarStyle
        {
            get { return (Style)GetValue(AlternativeCalendarStyleProperty); }
            set { SetValue(AlternativeCalendarStyleProperty, value); }
        }

        #region 今天
        private void goToday_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            this.SelectedDate = DateTime.Now;
            popup.IsOpen = false;
        }
        #endregion

        #region 清空
        private void goClear_MouseLeftButtonUp(object sender, MouseButtonEventArgs e)
        {
            this.SelectedDate = null;
            popup.IsOpen = false;
        }
        #endregion


    }
}