using System;
using System.Collections.Generic;
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 Muchinfo.WPF.Controls.Textbox
{
    /// <summary>
    /// BankAccountNumberTextBox.xaml 的交互逻辑
    /// </summary>
    public partial class BankAccountNumberTextBox:UserControl
    {
        public BankAccountNumberTextBox()
        {
            InitializeComponent(); 
        }
        public string Text 
        {
            get { return (string)GetValue(TextProperty); } 
            set { SetValue(TextProperty, value);} 
        }
        public static readonly DependencyProperty TextProperty = DependencyProperty.Register("Text", typeof(string), typeof(BankAccountNumberTextBox),new FrameworkPropertyMetadata(SetTextBoxValue){BindsTwoWayByDefault=true});

        private static void SetTextBoxValue(DependencyObject d, DependencyPropertyChangedEventArgs e)
        { 
            (d as BankAccountNumberTextBox).txtBankAccountNumber.Text = e.NewValue.ToString();
            string NewTxt = (d as BankAccountNumberTextBox).txtBankAccountNumber.Text.Replace(" ", "");
            Char[] char1 = NewTxt.ToCharArray();
            StringBuilder sb = new System.Text.StringBuilder();
            for (int i = 0; i < NewTxt.Length; i++)
            {
                if (i != 0 && i % 4 == 0 && i <= 16)
                {
                    sb.Append(" ");
                }
                sb.Append(char1[i]);
            }
            (d as BankAccountNumberTextBox).txtBankAccountNumber.Text = sb.ToString();
            (d as BankAccountNumberTextBox).txtBankAccountNumber.Select((d as BankAccountNumberTextBox).txtBankAccountNumber.Text.Length, 0);
        }
        
        private void txtBankAccountNumber_TextChanged(object sender, TextChangedEventArgs e)
        {
            try
            {
                //屏蔽中文输入和非法字符粘贴输入
                TextBox textBox = sender as TextBox;
                TextChange[] change = new TextChange[e.Changes.Count];
                e.Changes.CopyTo(change, 0);
                int offset = change[0].Offset;
                decimal numb = 0;
                if (change[0].AddedLength > 0)
                {
                    if (!decimal.TryParse(textBox.Text.Replace(" ", ""), out numb))
                    {
                        textBox.Text = textBox.Text.Remove(offset, change[0].AddedLength);
                        textBox.Select(offset, 0);
                    }
                    Text = txtBankAccountNumber.Text.Replace(" ", ""); ;
                }
            }
            catch (System.Exception ex)
            {
            } 
        } 
    
        private void txtBankAccountNumber_KeyDown(object sender, KeyEventArgs e)
        {
            TextBox txt = sender as TextBox;
            //屏蔽非法按键
            if ((e.Key >= Key.NumPad0 && e.Key <= Key.NumPad9))
            {
                e.Handled = false;
            }
            else if (((e.Key >= Key.D0 && e.Key <= Key.D9) || e.Key == Key.OemPeriod) && e.KeyboardDevice.Modifiers != ModifierKeys.Shift)
            {
                e.Handled = false;
            }
            else if (e.Key == Key.Tab)
            {
                e.Handled = false;
            }
            else
            {
                e.Handled = true;
            } 
        }

        private void txtBankAccountNumber_KeyUp(object sender, KeyEventArgs e)
        {
            TextBox txt = sender as TextBox;
            string NewTxt = txt.Text.Replace(" ", "");
            Char[] char1 = NewTxt.ToCharArray();
            StringBuilder sb = new System.Text.StringBuilder();
            for (int i = 0; i < NewTxt.Length; i++)
            {
                if (i != 0 && i % 4 == 0 && i <= 16) 
                {
                    sb.Append(" ");
                }
                sb.Append(char1[i]);
            } 
            txt.Text = sb.ToString();
            txtBankAccountNumber.Select(txt.Text.Length, 0); 
        } 
    }
}