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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
// Description: Client-side wrapper for Table Pattern
using System;
using System.Windows.Automation.Provider;
using MS.Internal.Automation;
namespace System.Windows.Automation
{
/// <summary>
/// Identifies a grid that has header information.
/// </summary>
#if (INTERNAL_COMPILE)
internal class TablePattern: GridPattern
#else
public class TablePattern: GridPattern
#endif
{
//------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
private TablePattern(AutomationElement el, SafePatternHandle hPattern, bool cached)
: base(el, hPattern, cached)
{
// Done
}
#endregion Constructors
//------------------------------------------------------
//
// Public Constants / Readonly Fields
//
//------------------------------------------------------
#region Public Constants and Readonly Fields
/// <summary>Table pattern</summary>
public static readonly new AutomationPattern Pattern = TablePatternIdentifiers.Pattern;
/// <summary>Property ID: RowHeaders - Collection of all row headers for this table</summary>
public static readonly AutomationProperty RowHeadersProperty = TablePatternIdentifiers.RowHeadersProperty;
/// <summary>Property ID: ColumnHeaders - Collection of all column headers for this table</summary>
public static readonly AutomationProperty ColumnHeadersProperty = TablePatternIdentifiers.ColumnHeadersProperty;
/// <summary>Property ID: RowOrColumnMajor - Indicates if the data is best presented by row or column</summary>
public static readonly AutomationProperty RowOrColumnMajorProperty = TablePatternIdentifiers.RowOrColumnMajorProperty;
#endregion Public Constants and Readonly Fields
//------------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
#region Public Properties
/// <summary>
/// This member allows access to previously requested
/// cached properties for this element. The returned object
/// has accessors for each property defined for this pattern.
/// </summary>
/// <remarks>
/// Cached property values must have been previously requested
/// using a CacheRequest. If you try to access a cached
/// property that was not previously requested, an InvalidOperation
/// Exception will be thrown.
///
/// To get the value of a property at the current point in time,
/// access the property via the Current accessor instead of
/// Cached.
/// </remarks>
new public TablePatternInformation Cached
{
get
{
Misc.ValidateCached(_cached);
return new TablePatternInformation(_el, true);
}
}
/// <summary>
/// This member allows access to current property values
/// for this element. The returned object has accessors for
/// each property defined for this pattern.
/// </summary>
/// <remarks>
/// This pattern must be from an AutomationElement with a
/// Full reference in order to get current values. If the
/// AutomationElement was obtained using AutomationElementMode.None,
/// then it contains only cached data, and attempting to get
/// the current value of any property will throw an InvalidOperationException.
///
/// To get the cached value of a property that was previously
/// specified using a CacheRequest, access the property via the
/// Cached accessor instead of Current.
/// </remarks>
new public TablePatternInformation Current
{
get
{
Misc.ValidateCurrent(_hPattern);
return new TablePatternInformation(_el, false);
}
}
#endregion Public Properties
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
internal static new object Wrap(AutomationElement el, SafePatternHandle hPattern, bool cached)
{
return new TablePattern(el, hPattern, cached);
}
#endregion Internal Methods
//------------------------------------------------------
//
// Private Fields
//
//------------------------------------------------------
#region Private Fields
// No new fields needed here - we use those inherited from base class
#endregion Private Fields
//------------------------------------------------------
//
// Nested Classes
//
//------------------------------------------------------
#region Nested Classes
/// <summary>
/// This class provides access to either Cached or Current
/// properties on a pattern via the pattern's .Cached or
/// .Current accessors.
/// </summary>
public struct TablePatternInformation
{
//------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
internal TablePatternInformation(AutomationElement el, bool useCache)
{
_el = el;
_useCache = useCache;
}
#endregion Constructors
//------------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
#region Public Properties
/// <summary>Collection of all row headers for this table</summary>
public AutomationElement[] GetRowHeaders()
{
return (AutomationElement[])_el.GetPatternPropertyValue(RowHeadersProperty, _useCache);
}
/// <summary>Collection of all column headers for this table</summary>
public AutomationElement[] GetColumnHeaders()
{
return (AutomationElement[])_el.GetPatternPropertyValue(ColumnHeadersProperty, _useCache);
}
/// <summary>
/// number of rows in the grid
/// </summary>
public int RowCount
{
get
{
return (int)_el.GetPatternPropertyValue(RowCountProperty, _useCache);
}
}
/// <summary>
/// number of columns in the grid
/// </summary>
public int ColumnCount
{
get
{
return (int)_el.GetPatternPropertyValue(ColumnCountProperty, _useCache);
}
}
/// <summary>Indicates if the data is best presented by row or column</summary>
public RowOrColumnMajor RowOrColumnMajor
{
get
{
return (RowOrColumnMajor)_el.GetPatternPropertyValue(RowOrColumnMajorProperty, _useCache);
}
}
#endregion Public Properties
//------------------------------------------------------
//
// Private Fields
//
//------------------------------------------------------
#region Private Fields
private AutomationElement _el; // AutomationElement that contains the cache or live reference
private bool _useCache; // true to use cache, false to use live reference to get current values
#endregion Private Fields
}
#endregion Nested Classes
}
}
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