using System;
using System.Collections.Generic;
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 Microsoft.Win32;

namespace CustomWPF
{
  public partial class FileBrowserBox : System.Windows.Controls.UserControl
  {
    public FileBrowserBox()
    {
      InitializeComponent();
    }

    #region FilePath Property
    public String FilePath
    {
      get { return pathText.Text; }
      set { pathText.Text= value; }
    }
    #endregion // FilePath Property

    #region OutlineBrush Property
    /// <summary>
    /// The Dependency Property for the 
    /// OutlineBrush property.
    /// </summary>
    public static readonly DependencyProperty OutlineBrushProperty =
            DependencyProperty.Register(
                "OutlineBrush", 
                typeof(Brush), 
                typeof(FileBrowserBox),
                new FrameworkPropertyMetadata(Brushes.Black,
                    new PropertyChangedCallback(OnOutlineBrushChanged)));


    /// <summary>
    /// The Outline Brush used for the
    /// FileBrowserBox control.
    /// </summary>
    public Brush OutlineBrush
    {
      get { return (Brush)GetValue(OutlineBrushProperty); }
      set { SetValue(OutlineBrushProperty, value); }
    }

    /// <summary>
    /// Static Event that is called when the property is changed.
    /// </summary>
    /// <param name="obj">The object that has changed.</param>
    /// <param name="args">The arguments to the property.</param>
    private static void OnOutlineBrushChanged(DependencyObject obj, DependencyPropertyChangedEventArgs args)
    {
      FileBrowserBox control = (FileBrowserBox)obj;
      control.UpdateOutlineBrush();
    }
    #endregion // OutlineBrush Property

    void UpdateOutlineBrush()
    {
      pathText.BorderBrush = OutlineBrush;
      browseButton.BorderBrush = OutlineBrush;
    }

    public void browseButton_Click(object sender, RoutedEventArgs args)
    {
      OpenFileDialog dlg = new OpenFileDialog();
      dlg.Multiselect = false;
      if (dlg.ShowDialog().GetValueOrDefault())
      {
        pathText.Text = dlg.FileName;
      }
    }

    public void controlBorder_SizeChanged(object sender, SizeChangedEventArgs args)
    {
      if (args.WidthChanged)
      {
        double newWidth = args.NewSize.Width - 
                          browseButton.ActualWidth;

        if (newWidth > browseButton.ActualWidth)
        {
          pathText.Width = newWidth;
        }
        else
        {
          pathText.Width = 0;
        }
      }
    }
  }
}