mcs/class/referencesource/System.Activities.Presentation/System.Activities.Core.Presentation/System/Activities/Core/Presentation/ReorderableListEditor.xaml.cs

   1 //----------------------------------------------------------------
   2 // <copyright company="Microsoft Corporation">
   3 //     Copyright (c) Microsoft Corporation.  All rights reserved.
   4 // </copyright>
   5 //----------------------------------------------------------------
   6
   7 namespace System.Activities.Core.Presentation
   8 {
   9     using System.Activities.Presentation.Internal.PropertyEditing;
  10     using System.Collections.ObjectModel;
  11     using System.Windows;
  12     using System.Windows.Controls;
  13     using System.Windows.Input;
  14
  15     internal partial class ReorderableListEditor : UserControl
  16     {
  17         public static readonly DependencyProperty ItemTemplateProperty = DependencyProperty.Register("ItemTemplate", typeof(DataTemplate), typeof(ReorderableListEditor), new PropertyMetadata(null));
  18         public static readonly DependencyProperty ListProperty = DependencyProperty.Register("List", typeof(ObservableCollection<ExpandableItemWrapper>), typeof(ReorderableListEditor), new PropertyMetadata(null));
  19         public static readonly DependencyProperty SelectedListItemProperty = DependencyProperty.Register("SelectedListItem", typeof(ExpandableItemWrapper), typeof(ReorderableListEditor), new PropertyMetadata(null));
  20
  21         public ReorderableListEditor()
  22         {
  23             this.InitializeComponent();
  24         }
  25
  26         public DataTemplate ItemTemplate
  27         {
  28             get { return (DataTemplate)this.GetValue(ItemTemplateProperty); }
  29             set { this.SetValue(ItemTemplateProperty, value); }
  30         }
  31
  32         public ObservableCollection<ExpandableItemWrapper> List
  33         {
  34             get { return (ObservableCollection<ExpandableItemWrapper>)this.GetValue(ListProperty); }
  35             set { this.SetValue(ListProperty, value); }
  36         }
  37
  38         public ExpandableItemWrapper SelectedListItem
  39         {
  40             get { return (ExpandableItemWrapper)this.GetValue(SelectedListItemProperty); }
  41             set { this.SetValue(SelectedListItemProperty, value); }
  42         }
  43
  44         protected override void OnIsKeyboardFocusWithinChanged(DependencyPropertyChangedEventArgs e)
  45         {
  46             if (!this.listBox.IsKeyboardFocusWithin)
  47             {
  48                 this.listBox.UnselectAll();
  49             }
  50
  51             base.OnIsKeyboardFocusWithinChanged(e);
  52         }
  53
  54         private void OnListBoxPreviewGotKeyboardFocus(object sender, KeyboardFocusChangedEventArgs e)
  55         {
  56             ListBoxItem item = VisualTreeUtils.FindVisualAncestor<ListBoxItem>(e.OriginalSource as DependencyObject);
  57
  58             if (item != null)
  59             {
  60                 this.SelectedListItem = item.Content as ExpandableItemWrapper;
  61             }
  62         }
  63
  64         private void OnUpArrowClicked(object sender, RoutedEventArgs e)
  65         {
  66             int oldIndex = this.List.IndexOf(this.SelectedListItem);
  67             if (oldIndex > 0)
  68             {
  69                 this.List.Move(oldIndex, oldIndex - 1);
  70             }
  71         }
  72
  73         private void OnDownArrowClicked(object sender, RoutedEventArgs e)
  74         {
  75             int oldIndex = this.List.IndexOf(this.SelectedListItem);
  76             if (oldIndex < this.List.Count - 1)
  77             {
  78                 this.List.Move(oldIndex, oldIndex + 1);
  79             }
  80         }
  81     }
  82 }