PDFOffice_Windows_exe/PDF Office/CustomControl/WritableComboBox.xaml.cs

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
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 PDF_Office.CustomControl
{
    /// <summary>
    /// WritableComboBox.xaml 的交互逻辑
    /// </summary>
    public partial class WritableComboBox : UserControl
    {
        public WritableComboBox()
        {
            InitializeComponent();
        }
        private void writableComboBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
        {
            if (this.writableComboBox.SelectedIndex == this.writableComboBox.Items.Count - 1)
            {
                this.writableTextBox.Width = this.writableComboBox.ActualWidth - 18;
                Trace.WriteLine(this.writableComboBox.ActualWidth);
                this.writableTextBox.Visibility = Visibility.Visible;
                
            }
            else
            {
                if (this.writableTextBox != null) { 
                this.writableTextBox.Visibility = Visibility.Hidden;
                }
           this.SelectedIndex=this.writableComboBox.SelectedIndex.ToString();

            }
        }

        public string SelectedIndex
        {
            get { return (string)GetValue(SelectedIndexProperty); }
            set { SetValue(SelectedIndexProperty, value); }
        }

        // Using a DependencyProperty as the backing store for MyProperty.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty SelectedIndexProperty =
            DependencyProperty.Register("SelectedIndex", typeof(string), typeof(WritableComboBox), new PropertyMetadata(""));

        public string Text
        {
            get { return (string)GetValue(TextProperty); }
            set { SetValue(TextProperty, value); }
        }

        // Using a DependencyProperty as the backing store for MyProperty.  This enables animation, styling, binding, etc...
        public static readonly DependencyProperty TextProperty =

            DependencyProperty.Register("Text", typeof(string), typeof(WritableComboBox), new PropertyMetadata(""));

        private void writableTextBox_TextChange(object sender, TextChangedEventArgs e)
        {
            if (this.writableComboBox.SelectedIndex == this.writableComboBox.Items.Count - 1)
            {
                Text = this.writableTextBox.Text;
            }
            else { Text = ""; }
        }
    }
}