mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/Base/Core/Internal/PropertyEditing/Automation/CategoryListAutomationPeer.cs

   1 //----------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //----------------------------------------------------------------
   4 namespace System.Activities.Presentation.Internal.PropertyEditing.Automation
   5 {
   6     using System;
   7     using System.Collections.Generic;
   8     using System.Diagnostics;
   9     using System.Globalization;
  10     using System.Text;
  11     using System.Windows;
  12     using System.Windows.Automation;
  13     using System.Windows.Automation.Peers;
  14     using System.Windows.Automation.Provider;
  15     using System.Windows.Controls;
  16     using System.Windows.Media;
  17
  18     using System.Activities.Presentation.PropertyEditing;
  19     using System.Activities.Presentation;
  20
  21     using System.Activities.Presentation.Internal.PropertyEditing.FromExpression.Framework.PropertyInspector;
  22     using System.Activities.Presentation.Internal.PropertyEditing.Model;
  23     using System.Activities.Presentation.Internal.PropertyEditing.Selection;
  24     using System.Activities.Presentation.Internal.Properties;
  25
  26     // <summary>
  27     // AutomationPeer for CategoryList class
  28     // </summary>
  29     internal class CategoryListAutomationPeer : ItemsControlAutomationPeer, IAutomationFocusChangedEventSource
  30     {
  31
  32         private CategoryList _control;
  33         // Children list.
  34         private List<AutomationPeer> _children;
  35
  36         // <summary>
  37         // Basic ctor
  38         // </summary>
  39         // <param name="owner">Contained CategoryList</param>
  40         public CategoryListAutomationPeer(CategoryList owner)
  41             : base(owner)
  42         {
  43             if (owner == null)
  44             {
  45                 throw FxTrace.Exception.ArgumentNull("owner");
  46             }
  47
  48             _control = owner;
  49             _children = new List<AutomationPeer>();
  50         }
  51
  52         protected override ItemAutomationPeer CreateItemAutomationPeer(object item)
  53         {
  54
  55             ItemAutomationPeer peer = CategoryContainerAutomationPeer.CreateItemAutomationPeer(
  56                 item as ModelCategoryEntry,
  57                 _control.ItemContainerGenerator.ContainerFromItem(item) as CiderCategoryContainer,
  58                 this);
  59
  60             //Add each item to the children's list
  61             _children.Add(peer);
  62
  63             return peer;
  64         }
  65
  66         protected override string GetClassNameCore()
  67         {
  68             return typeof(ItemsControl).Name;
  69         }
  70
  71         protected override string GetNameCore()
  72         {
  73             return Resources.PropertyEditing_CategoryList;
  74         }
  75
  76         // We use the ItemStatus to convey read-only property selection status
  77         protected override string GetItemStatusCore()
  78         {
  79             FrameworkElement selection = _control.Selection;
  80             string status;
  81
  82             if (selection != null)
  83             {
  84                 ISelectionStop selectionStop = PropertySelection.GetSelectionStop(selection);
  85                 status = selectionStop == null ? null : selectionStop.Description;
  86
  87                 if (status == null)
  88                 {
  89                     status = string.Format(
  90                         CultureInfo.CurrentCulture,
  91                         Resources.PropertyEditing_SelectionStatus_Unknown,
  92                         selection.GetType().Name);
  93                 }
  94             }
  95             else
  96             {
  97                 status = Resources.PropertyEditing_SelectionStatus_Empty;
  98             }
  99
 100             return status;
 101         }
 102
 103         // IAutomationFocusChangedEventSource Members
 104         public void UnloadEventHook()
 105         {
 106             if (_children != null)
 107             {
 108                 foreach (AutomationPeer peer in _children)
 109                 {
 110                     IAutomationFocusChangedEventSource unhookEventPeer = peer as IAutomationFocusChangedEventSource;
 111                     if (unhookEventPeer != null)
 112                     {
 113                         unhookEventPeer.UnloadEventHook();
 114                     }
 115                 }
 116             }
 117         }
 118
 119     }
 120 }