/***************************************************************************************

   Extended WPF Toolkit

   Copyright (C) 2007-2014 Xceed Software Inc.

   This program is provided to you under the terms of the Microsoft Public
   License (Ms-PL) as published at http://wpftoolkit.codeplex.com/license 

   For more features, controls, and fast professional support,
   pick up the Plus Edition at http://xceed.com/wpf_toolkit

   Stay informed: follow @datagrid on Twitter or Like http://facebook.com/datagrids

  *************************************************************************************/

using System.Windows.Media;
using System.Windows.Controls;
using System;
using System.Diagnostics;
using System.Windows;
using Xceed.Wpf.Toolkit;
using System.IO;
using System.Windows.Media.Imaging;
using Xceed.Wpf.Samples.SampleData;
using System.Collections.ObjectModel;
using System.Windows.Data;

namespace Xceed.Wpf.Toolkit.LiveExplorer.Samples.PileFlowPanel.Views
{
  /// <summary>
  /// Interaction logic for PileFlowPanelView.xaml
  /// </summary>
  public partial class PileFlowPanelView : DemoView
  {
    #region Initialization

    public PileFlowPanelView()
    {
#if !OPEN_SOURCE
      this.DataContext = SampleDataProvider.SharedEmployees;
#endif

      InitializeComponent();
#if !OPEN_SOURCE
      _pileFlowPanel.PileFlowItemActivated += new Xceed.Wpf.Toolkit.PileFlowPanel.PileFlowItemActivatedHandler( this.PileFlowItemActivated );
      _pileFlowPanel.PileFlowItemDeactivated += new Xceed.Wpf.Toolkit.PileFlowPanel.PileFlowItemDeactivatedHandler( this.PileFlowItemDeactivated );

      ObservableCollection<Product> products = SampleDataProvider.GetProducts();
      foreach( Product product in products )
      {
        this.AddImage( product );
      }
#endif
    }

    #endregion

#if !OPEN_SOURCE
    #region Event Handlers

    private void PileFlowItemActivated( object sender, Xceed.Wpf.Toolkit.PileFlowPanel.PileFlowActivationEventArgs e )
    {
      //# Modify the text label.
      _pileFlowPanel.ContentLabel.Visibility = Visibility.Visible;
      _pileFlowLabel.Text = e.Item.Element.Tag as string;

      //# Enable the first PileFlowItem.
      if( object.Equals( ( ( PileFlowItem )sender ).Element, _employeesPileFlowCard ) )
      {
        _employeeListBox.IsEnabled = true;
      }
    }

    private void PileFlowItemDeactivated( object sender, EventArgs e )
    {
      //# Hide the text Label.
      _pileFlowPanel.ContentLabel.Visibility = Visibility.Collapsed;
      _pileFlowLabel.Text = null;

      //# Enable the first PileFlowItem.
      if( object.Equals( ( ( PileFlowItem )sender ).Element, _employeesPileFlowCard ) )
      {
        _employeeListBox.IsEnabled = false;
      }
    }

    private void OnEmployeeButtonPress( object sender, EventArgs e )
    {
      Xceed.Wpf.Toolkit.MessageBox.Show( "Employee data has been saved.", "Employee", MessageBoxButton.OK, MessageBoxImage.Asterisk);
    }

    private void OnShowReflectionsClick( object sender, RoutedEventArgs e )
    {
      CheckBox checkBox = ( CheckBox )sender;
      foreach( UIElement item in _pileFlowPanel.Children )
      {
        if( item is PileFlowCard )
        {
          (( PileFlowCard )item).ShowReflection = ( bool )checkBox.IsChecked;
        }
      }
    }

    private void OnBeginReflectionOpacityChanged( object sender, RoutedPropertyChangedEventArgs<object> e )
    {
      this.ModifyReflection( sender, true );      
    }

    private void OnEndReflectionOpacityChanged( object sender, RoutedPropertyChangedEventArgs<object> e )
    {
      this.ModifyReflection( sender, false );        
    }
    
    #endregion

#endif

    #region Implementation

#if !OPEN_SOURCE
    private void ModifyReflection( object sender, bool isBeginReflectionOpacity )
    {
      if( _pileFlowPanel != null )
      {
        DoubleUpDown opacity = ( DoubleUpDown )sender;
        foreach( UIElement item in _pileFlowPanel.Children )
        {
          if( item is PileFlowCard )
          {
            PileFlowCard card = ( PileFlowCard )item;
            double opacityValue = ( opacity.Value != null ) ? ( double )opacity.Value : 0d;
            if( isBeginReflectionOpacity )
            {
              card.BeginReflectionOpacity = opacityValue;
            }
            else
            {
              card.EndReflectionOpacity = opacityValue;
            }
          }
        }
      }
    }

    private void AddImage( Product product )
    {
      BitmapImage imageSource = null;
      byte[] imageBytes = product.Photo;
      if( imageBytes != null )
      {
        Stream imageStream = new MemoryStream( imageBytes );
        imageSource = new BitmapImage();
        imageSource.BeginInit();
        imageSource.CacheOption = BitmapCacheOption.OnLoad;
        imageSource.StreamSource = imageStream;
        imageSource.EndInit();

        //# Use a border to delimit the photos
        Border border = new Border();
        border.BorderBrush = new SolidColorBrush( Colors.Black );
        border.BorderThickness = new Thickness( 2 );        
        border.Background = new ImageBrush( imageSource );

        //# Use a PileFlowCard to use Reflection.
        PileFlowCard card = new PileFlowCard();
        card.Child = border;
        card.Tag = product.ProductName;

        _pileFlowPanel.Children.Add( card );
      }
    }
#endif

    #endregion
  }
}