Code:
/ 4.0 / 4.0 / untmp / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / UIAutomation / Win32Providers / MS / Internal / AutomationProxies / WindowsListViewItemStartMenu.cs / 1305600 / WindowsListViewItemStartMenu.cs
//---------------------------------------------------------------------------- // //// Copyright (C) Microsoft Corporation. All rights reserved. // // // // Description: Win32 ListView Item proxy for the Start Menu. // The Start Menu has a special use of ListViews. The items in the // list are treated like menuitems. To expose this special behavor // data from MSAA is need. The Shell team has implemented a special // IAccessible to support the Sart Menu. // // History: // 2005/01/25 - [....] - Created // //--------------------------------------------------------------------------- using System; using System.ComponentModel; using System.Windows.Automation; using System.Windows.Automation.Provider; using System.Windows; using Accessibility; using MS.Win32; namespace MS.Internal.AutomationProxies { // This class will only change a couple of aspects of a ListViewItem. So derive from the ListViewItem to // retain the majority of the ListView item functionality. internal class ListViewItemStartMenu : ListViewItem { // ----------------------------------------------------- // // Constructors // //----------------------------------------------------- #region Constructors internal ListViewItemStartMenu(IntPtr hwnd, ProxyFragment parent, int item, IAccessible acc) : base (hwnd, parent, item) { // The items are zero based, i.e. the first listview item is item 0. The // zero item in MSAA is self, so need to add one to the item to get the // correct Accessible child. AccessibleRole role = Accessible.GetRole(acc, item + 1); // Normal Listview items should be of control type listitem. But // the Listview items in the Start Menu act like menuitems. Get the Role // from IAccessible interface implemented by the Shell team and set the // control type. if (role == AccessibleRole.MenuItem) { _cControlType = ControlType.MenuItem; } else { System.Diagnostics.Debug.Assert(false, "The listview item on the Start Menu has an unexpected IAccessible role!"); } } #endregion Constructos //------------------------------------------------------ // // Patterns Implementation // //----------------------------------------------------- #region ProxySimple Interface // Returns a pattern interface if supported. internal override object GetPatternProvider(AutomationPattern iid) { // Treate these listview items as menuitems and only support Invoke or Expand/Collapse patterns. // Invoke Pattern needs to be supported when the item has no children. When the item does have // children it needs to support ExpandCollapse Pattern. if (iid == InvokePattern.Pattern) { return this; } // return null; } // Process all the Logical and Raw Element Properties internal override object GetElementProperty(AutomationProperty idProp) { // Normal Listview items do not have a concept of an AccessKey. But // the Listview items in the Start Menu does. This information is // in the IAccessible interface implemented by the Shell team. if (idProp == AutomationElement.AccessKeyProperty) { // The IAccessible should be valid here since it is the cached value in ProxySimple. System.Diagnostics.Debug.Assert(AccessibleObject != null, "Failed to get a valid IAccessible!"); try { string key = AccessibleObject.get_accKeyboardShortcut(_item + 1); if (!string.IsNullOrEmpty(key)) { return ST.Get(STID.KeyAlt) + "+" + key; } } catch (Exception e) { if (Misc.IsCriticalException(e)) { throw; } } } else if (idProp == AutomationElement.HasKeyboardFocusProperty) { return IsFocused(); } return base.GetElementProperty(idProp); } #endregion } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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