WindowsListViewSubItem.cs source code in C# .NET

Source code for the .NET framework in C#

                        
Code:

                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / AccessibleTech / longhorn / Automation / Win32Providers / MS / Internal / AutomationProxies / WindowsListViewSubItem.cs / 1 / WindowsListViewSubItem.cs
                        

                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: Win32 ListViewSubItem proxy 
//
// History: 
//        [....], alexsn - Created (in DotNet)
//        2003/08/12 - alexsn Updated for WCP
//
//--------------------------------------------------------------------------- 

using System; 
using System.ComponentModel; 
using System.Windows.Automation;
using System.Windows.Automation.Provider; 
using System.Windows;
using MS.Win32;
using Accessibility;
 
namespace MS.Internal.AutomationProxies
{ 
    internal class ListViewSubItem: ProxySimple, IGridItemProvider, ITableItemProvider, IValueProvider 
    {
        // ----------------------------------------------------- 
        //
        //  Constructors
        //
        //----------------------------------------------------- 

        #region Constructors 
 
        internal ListViewSubItem (IntPtr hwnd, ProxyFragment parent, int item, int itemParent)
            : base (hwnd, parent, item) 
        {
            // Is used to discriminate between items in a collection.
            _itemParent = itemParent;
 
            _cControlType = WindowsListView.ListViewEditable(hwnd) ? ControlType.Edit : ControlType.Text;
        } 
 
        #endregion Constructos
 
        //------------------------------------------------------
        //
        //  Patterns Implementation
        // 
        //-----------------------------------------------------
 
        #region ProxySimple Interface 

        // Returns a pattern interface if supported. 
        internal override object GetPatternProvider (AutomationPattern iid)
        {
            if (iid == GridItemPattern.Pattern)
            { 
                return this;
            } 
 
            // Only the first element is editable
            if (iid == ValuePattern.Pattern && _item == 0 && WindowsListView.ListViewEditable (_hwnd)) 
            {
                return this;
            }
 
            if (iid == TableItemPattern.Pattern)
            { 
                return this; 
            }
 
            return null;
        }

        // Gets the bounding rectangle for this element 
        internal override Rect BoundingRectangle
        { 
            get 
            {
                NativeMethods.Win32Rect itemRectangle; 

                // NOTE: 1st(column 0) subitem is a special one, since it is fake, Win32's LV does not
                // have a subitem 0 in report mode
                int lvir = (_item == 0) ? NativeMethods.LVIR_SELECTBOUNDS : NativeMethods.LVIR_BOUNDS; 

                if (!WindowsListView.GetSubItemRect (_hwnd, _itemParent, _item, lvir, out itemRectangle)) 
                { 
                    return Rect.Empty;
                } 

                // Special case: LV is full row select, with more than 1 column and we are looking at the first item.
                // Only IconViews and DetailViews are processed here.  TileViews will be processed as a
                // ListViewItem.  The DetailView is the only view that is in a row/column layout with its data. 
                if (WindowsListView.FullRowSelect(_hwnd) && !WindowsListView.HasJustifyColumnsExStyle(_hwnd) &&
                    !WindowsListView.IsIconView(_hwnd) && _item == 0 && 1 < ListViewItem.GetSubItemCount(_hwnd)) 
                { 
                    NativeMethods.Win32Rect itemRectangle1;
 
                    if (!WindowsListView.GetSubItemRect(_hwnd, _itemParent, 1, NativeMethods.LVIR_BOUNDS, out itemRectangle1))
                    {
                        return Rect.Empty;
                    } 

                    // Derived values from the adjacent subitems are conditional based on RTL 
                    if (Misc.IsControlRTL(_hwnd)) 
                    {
                        itemRectangle.left = itemRectangle1.right; 
                    }
                    else
                    {
                        itemRectangle.right = itemRectangle1.left; 
                    }
 
                    // take checkbox into account 
                    if (ListViewItem.IsItemWithCheckbox (_hwnd, _itemParent))
                    { 
                        NativeMethods.Win32Rect checkboxRectangle = ListViewItemCheckbox.ListViewCheckBoxRect (_hwnd, _itemParent);

                        // Derived values from the adjacent subitems are conditional based on RTL
                        if (Misc.IsControlRTL(_hwnd)) 
                        {
                            itemRectangle.right -= (checkboxRectangle.right - checkboxRectangle.left); 
                        } 
                        else
                        { 
                            itemRectangle.left += (checkboxRectangle.right - checkboxRectangle.left);
                        }
                    }
                } 

                // Don't need to normalize, GetSubItemRect returns absolute coordinates. 
                return itemRectangle.ToRect(false); 
            }
        } 

        // Process all the Logical and Raw Element Properties
        internal override object GetElementProperty(AutomationProperty idProp)
        { 
            if (idProp == AutomationElement.IsOffscreenProperty)
            { 
                Rect parentRect = GetParent().GetParent().BoundingRectangle; 
                Rect itemRect = BoundingRectangle;
                if (itemRect.IsEmpty || parentRect.IsEmpty) 
                {
                    return true;
                }
 
                // Need to check if this item is visible on the whole control not just its immediate parent.
                if (!Misc.IsItemVisible(ref parentRect, ref itemRect)) 
                { 
                    return true;
                } 
            }
            else if (idProp == AutomationElement.HasKeyboardFocusProperty)
            {
                IAccessible acc = AccessibleObject; 
                // 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, _itemParent + 1);
 
                // ListView Iaccessible knows when its really a menu item
                if (role == AccessibleRole.MenuItem)
                {
                    // Use the IsFocused of the Subitem instead the the one in ProxySimple 
                    // When ListViews are used for menus they don't get focus
                    // so the check for "does this hwnd have focus" fails 
                    return IsFocused (); 
                }
 
                // If we are in a SysListView32 and that list view is in the Start Menu search column
                // real focus can stay on the edit box, while a virtual focus navigates the list
                // If this is the case, only check IsFocused, don't do the GetGUIThreadInfo check.
                IntPtr ancestor = _hwnd; 
                IntPtr desktop = UnsafeNativeMethods.GetDesktopWindow();
 
                while (ancestor != IntPtr.Zero && ancestor != desktop) 
                {
                    if (Misc.GetClassName(ancestor) == "Desktop Search Open View") 
                    {
                        return IsFocused();
                    }
                    ancestor = Misc.GetParent(ancestor); 
                }
            } 
 
            return base.GetElementProperty(idProp);
        } 


        //Gets the controls help text
        internal override string HelpText 
        {
            get 
            { 
                return WindowsListView.GetItemToolTipText(_hwnd);
            } 
        }

        //Gets the localized name
        internal override string LocalizedName 
        {
            get 
            { 
                string name = ListViewItem.GetText(_hwnd, _itemParent, _item);
                return name.Length < Misc.MaxLengthNameProperty ? name : name.Substring(0, Misc.MaxLengthNameProperty); 
            }
        }

        // Sets the focus to this item. 
        internal override bool SetFocus()
        { 
            // Set the item's state to focused. 
            return WindowsListView.SetItemFocused (_hwnd, this._itemParent);
        } 

        #endregion ProxySimple Interface

        #region Value Pattern 

        void IValueProvider.SetValue (string val) 
        { 
            // Make sure that the control is enabled
            if (!SafeNativeMethods.IsWindowEnabled(_hwnd)) 
            {
                throw new ElementNotEnabledException();
            }
 
            ListViewItem.SetValue (val, _hwnd, _itemParent);
        } 
 
        // Request to get the value that this UI element is representing as a string
        string IValueProvider.Value 
        {
            get
            {
                return ListViewItem.GetText (_hwnd, _itemParent, _item); 
            }
        } 
 
        bool IValueProvider.IsReadOnly
        { 
            get
            {
                return !WindowsListView.ListViewEditable (_hwnd);
            } 
        }
 
 
        #endregion ValuePattern
 
        #region GridItemPattern

        int IGridItemProvider.Row
        { 
            get
            { 
                if (!WindowsListView.IsGroupViewEnabled (_hwnd)) 
                {
                    return _itemParent; 
                }

                // we're in the group mode:
                // In order to detect the item's row...find the location 
                // of this item in the array of group items, location will indicate the raw
                int groupID = ListViewItem.GetGroupID (_hwnd, _itemParent); 
 
                if (groupID != -1)
                { 
                    GroupManager.GroupInfo groupInfo = WindowsListViewGroup.GetGroupInfo (_hwnd, groupID);

                    if (groupInfo)
                    { 
                        int row = groupInfo.IndexOf (_itemParent);
 
                        if (row >= 0) 
                        {
                            return row; 
                        }
                    }
                }
 
                return -1;
            } 
        } 

        int IGridItemProvider.Column 
        {
            get
            {
                return _item; 
            }
        } 
 
        int IGridItemProvider.RowSpan
        { 
            get
            {
                return 1;
            } 
        }
 
        int IGridItemProvider.ColumnSpan 
        {
            get 
            {
                return 1;
            }
        } 

        IRawElementProviderSimple IGridItemProvider.ContainingGrid 
        { 
            get
            { 
                // ContainingGrid would be either Group or the ListView
                // For both cases we need to skip our immediate parent
                // which is ListViewItem => meaning ContainingGrid is defined as parent of the parent
                return _parent._parent; 
            }
        } 
 
        #endregion GridItemPattern
 
        #region TableItemPattern

        IRawElementProviderSimple [] ITableItemProvider.GetRowHeaderItems ()
        { 
            return null;
        } 
 
        IRawElementProviderSimple [] ITableItemProvider.GetColumnHeaderItems ()
        { 
            IntPtr hwndHeader = WindowsListView.ListViewGetHeader (_hwnd);
            if (SafeNativeMethods.IsWindowVisible (hwndHeader))
            {
 
                WindowsSysHeader header = (WindowsSysHeader) WindowsSysHeader.Create (hwndHeader, 0);
                return new IRawElementProviderSimple [] { new WindowsSysHeader.HeaderItem (hwndHeader, header, _item) }; 
            } 
            return null;
        } 

        #endregion TableItemPattern

        //------------------------------------------------------ 
        //
        //  Internal Methods 
        // 
        //------------------------------------------------------
 
        #region Internal Methods

        internal static ProxySimple ElementProviderFromPoint (IntPtr hwnd, ProxyFragment parent, int item, int x, int y)
        { 
            NativeMethods.LVHITTESTINFO_INTERNAL hitTest = WindowsListView.SubitemHitTest (hwnd, item, new NativeMethods.Win32Point (x, y));
 
            if (hitTest.iSubItem >= 0) 
            {
                return new ListViewSubItem (hwnd, parent, hitTest.iSubItem, item); 
            }

            // subitems do not exist
            return parent; 
        }
 
        #endregion Internal Methods 

        //----------------------------------------------------- 
        //
        //  Protected Methods
        //
        //------------------------------------------------------ 

        #region Protected Methods 
 
        // This routine is only called on elements belonging to an hwnd that has the focus.
        protected override bool IsFocused() 
        {
            if (Misc.IsComctrlV6OnOsVerV6orHigher(_hwnd))
            {
                int column = (int)Misc.ProxySendMessage(_hwnd, NativeMethods.LVM_GETFOCUSEDCOLUMN, IntPtr.Zero, IntPtr.Zero); 
                return column == _item;
            } 
 
            return WindowsListView.IsItemFocused (_hwnd, _itemParent);
        } 


        #endregion
 
        //-----------------------------------------------------
        // 
        //  Private Fields 
        //
        //----------------------------------------------------- 

        #region Private Fields

        // The item in the listview. _item is the SubItem 
        private int _itemParent;
 
        #endregion Private Fields 
    }
} 


// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.

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