using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.ComponentModel;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;

namespace SunCreate.Common.Controls
{
    /// <summary>
    /// MyTextBlock.xaml 的交互逻辑
    /// </summary>
    public partial class RollingNumberCtrl : INotifyPropertyChanged
    {
        private bool _firstLoaded = true;

        public double ItemHeight
        {
            get { return (double)this.GetValue(RollingNumberCtrl.ItemHeightProperty); }
            set
            { this.SetValue(RollingNumberCtrl.ItemHeightProperty, value); }
        }
        private static DependencyProperty ItemHeightProperty = DependencyProperty.Register("ItemHeight", typeof(double), typeof(RollingNumberCtrl));

        public string NumStr
        {
            get { return (string)this.GetValue(RollingNumberCtrl.NumStrProperty); }
            set
            { this.SetValue(RollingNumberCtrl.NumStrProperty, value); }
        }
        private static DependencyProperty NumStrProperty = DependencyProperty.Register("NumStr", typeof(string), typeof(RollingNumberCtrl), new PropertyMetadata(null, new PropertyChangedCallback(NumStrChanged)));

        private static void NumStrChanged(DependencyObject sender, DependencyPropertyChangedEventArgs e)
        {
            (sender as RollingNumberCtrl).UpdateNumStr((sender as RollingNumberCtrl).NumStr);
        }

        private void UpdateNumStr(string numStr)
        {
            Text = numStr;
        }

        private string _Text;
        /// <summary>
        /// 文本
        /// </summary>
        public string Text
        {
            get { return _Text; }
            set
            {
                _Text = value;
                OnPropertyChanged("Text");

                if (!_firstLoaded)
                {
                    RollingNumberItemCtrl[] numArr = new RollingNumberItemCtrl[stackPanel.Children.Count];
                    int index = 1;
                    foreach (RollingNumberItemCtrl num in stackPanel.Children)
                    {
                        numArr[numArr.Length - index++] = num;
                    }

                    if (_Text != null)
                    {
                        int i = 0;
                        foreach (char c in _Text.Reverse())
                        {
                            double d = Convert.ToInt32(c - 48); ;

                            numArr[i++].Num = d;
                        }
                        for (int k = 0; k < i; k++)
                        {
                            numArr[k].Visibility = Visibility.Visible;
                        }
                        for (int k = i; k < numArr.Length; k++)
                        {
                            numArr[k].Visibility = Visibility.Collapsed;
                        }
                    }
                }
            }
        }

        public RollingNumberCtrl()
        {
            InitializeComponent();
        }

        #region INotifyPropertyChanged接口
        public event PropertyChangedEventHandler PropertyChanged;

        protected void OnPropertyChanged(string name)
        {
            if (PropertyChanged != null)
            {
                PropertyChanged(this, new PropertyChangedEventArgs(name));
            }
        }
        #endregion

        private void UserControl_Loaded(object sender, RoutedEventArgs e)
        {
            if (_firstLoaded) _firstLoaded = false;

            foreach (RollingNumberItemCtrl num in stackPanel.Children)
            {
                num.Height = this.ItemHeight;
                num.Width = this.ItemHeight * 0.6;
                num.FontWeight = this.FontWeight;
            }

            Text = NumStr;
        }

    }
}