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;
using System.Globalization;


namespace MetroGauges
{
    /// <summary>
    /// UserControl1.xaml 的交互逻辑
    /// </summary>
    public partial class TreeNodeEdit : UserControl
    {

        public event EventHandler<NodeCheckInputArgs> NodeUpdated;

        private bool isCancel = false;
        //public static readonly RoutedEvent NodeUpdatedRoutedEvent =
        //    EventManager.RegisterRoutedEvent("NodeUpdatedHandle", RoutingStrategy.Bubble, typeof(EventHandler), typeof(TreeNodeEdit));

        //public event EventHandler NodeUpdated //自定义事件，通过自定义时间为路由事件RunRoutedEvent加载、卸载方法  
        //{
        //    add { this.AddHandler(NodeUpdatedRoutedEvent, value); }
        //    remove { this.RemoveHandler(NodeUpdatedRoutedEvent, value); }
        //}  

       
        #region Constructor

        public TreeNodeEdit()
        {
            InitializeComponent();
            base.Focusable = true;
            base.FocusVisualStyle = null;
            this.Loaded += new RoutedEventHandler(TreeNodeEdit_Loaded);
            
        }

        void TreeNodeEdit_Loaded(object sender, RoutedEventArgs e)
        {
            //if (OnlyRemark)
            //{
            //    ContentPresenter contentpresenter = AppUtility.SearchVisualTree<ContentPresenter>(this);
            //    DataTemplate MyDataTemplate = contentpresenter.ContentTemplate;
            //    TextBlock   myRemarkBlock= MyDataTemplate.FindName("txtRemark", contentpresenter) as TextBlock;
            //    TextBlock myTextBlock = MyDataTemplate.FindName("txtText", contentpresenter) as TextBlock;
            //    if (myRemarkBlock == null || myTextBlock == null) return;
            //    if (!string.IsNullOrWhiteSpace(myRemarkBlock.Text))
            //        myTextBlock.Visibility = System.Windows.Visibility.Collapsed;
                
            //}
        }

        #endregion Constructor

        #region Member Variables

        // We keep the old text when we go into editmode
        // in case the user aborts with the escape key
        private string oldText;

        #endregion Member Variables

        #region Properties


        public bool OnlyRemark
        {
            get
            {
                return (bool)GetValue(OnlyRemarkProperty);
            }
            set { SetValue(OnlyRemarkProperty, value); }
        }
        public static readonly DependencyProperty OnlyRemarkProperty =
            DependencyProperty.Register(
            "OnlyRemark",
            typeof(bool),
            typeof(TreeNodeEdit),
            new PropertyMetadata(false));

        public string ImageSource
        {
            get { return (string)GetValue(ImageSourceProperty); }
            set { SetValue(ImageSourceProperty, value); }
        }
        public static readonly DependencyProperty ImageSourceProperty =
            DependencyProperty.Register(
            "ImageSource",
            typeof(string),
            typeof(TreeNodeEdit),
            new PropertyMetadata(""));

        public string Text
        {
            get { 
                return (string)GetValue(TextProperty); 
            }
            set { SetValue(TextProperty, value); }
        }
        public static readonly DependencyProperty TextProperty =
            DependencyProperty.Register(
            "Text",
            typeof(string),
            typeof(TreeNodeEdit),
            new PropertyMetadata(""));

        public string Desctrition
        {
            get { return (string)GetValue(DesctritionProperty); }
            set { SetValue(DesctritionProperty, value); }
        }
        public static readonly DependencyProperty DesctritionProperty =
            DependencyProperty.Register(
            "Desctrition",
            typeof(string),
            typeof(TreeNodeEdit),
            new PropertyMetadata(""));

        public bool IsEditable
        {
            get { return (bool)GetValue(IsEditableProperty); }
            set { SetValue(IsEditableProperty, value); }
        }
        public static readonly DependencyProperty IsEditableProperty =
            DependencyProperty.Register(
            "IsEditable",
            typeof(bool),
            typeof(TreeNodeEdit),
            new PropertyMetadata(true));

        public bool IsInEditMode
        {
            get 
            {
                if (IsEditable)
                    return (bool)GetValue(IsInEditModeProperty);
                else
                    return false;
            }
            set
            {
                if (IsEditable)
                {
                    if (value) oldText = Text;
                    SetValue(IsInEditModeProperty, value);
                }
            }
        }
        public static readonly DependencyProperty IsInEditModeProperty =
            DependencyProperty.Register(
            "IsInEditMode",
            typeof(bool),
            typeof(TreeNodeEdit),
            new PropertyMetadata(false));

        public string TextFormat
        {
            get { return (string)GetValue(TextFormatProperty); }
            set
            {
                if (value == "") value = "{0}";
                SetValue(TextFormatProperty, value);
            }
        }
        public static readonly DependencyProperty TextFormatProperty =
            DependencyProperty.Register(
            "TextFormat",
            typeof(string),
            typeof(TreeNodeEdit),
            new PropertyMetadata("{0}"));

        public string FormattedText
        {
            get { return String.Format(TextFormat, Text); }
        }

        #endregion Properties

        #region Event Handlers

        // Invoked when we enter edit mode.
        void TextBox_Loaded(object sender, RoutedEventArgs e)
        {
            TextBox txt = sender as TextBox;

            // Give the TextBox input focus
            txt.Focus();

            txt.SelectAll();
        }

        // Invoked when we exit edit mode.
        void TextBox_LostFocus(object sender, RoutedEventArgs e)
        {
         
            this.IsInEditMode = false;
            e.Handled = true;


            if (NodeUpdated != null && !isCancel)
                NodeUpdated(this, new NodeCheckInputArgs() { OldText = oldText,NewText =Text });

            isCancel = false;
        }

        // Invoked when the user edits the annotation.
        void TextBox_KeyDown(object sender, KeyEventArgs e)
        {
            if (e.Key == Key.Enter)
            {
                this.IsInEditMode = false;
                e.Handled = true;
                
            }
            else if (e.Key == Key.Escape)
            {
                this.IsInEditMode = false;
                Text = oldText;
                e.Handled = true;
                isCancel = true;
            }
        }

        #endregion Event Handlers
    }

    //定义值转换器
    [ValueConversion(typeof(string), typeof(string))]
    public class TextVisibleConvert : IValueConverter
    {
        public object Convert(object value, Type targetType, object parameter, CultureInfo culture)
        {


            return "Visible";
        }

        public object ConvertBack(object value, Type targetType, object parameter, CultureInfo culture)
        {

            return "";
        }
    }

  
}