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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: Table column object implementation.
//
using System.Windows.Controls;
using System.Windows.Media;
using MS.Internal.PtsHost.UnsafeNativeMethods; // PTS restrictions
using MS.Internal.Documents;
namespace System.Windows.Documents
{
/// <summary>
/// Table column.
/// </summary>
public class TableColumn : FrameworkContentElement, IIndexedChild<Table>
{
//------------------------------------------------------
//
// Constructors
//
//------------------------------------------------------
#region Constructors
/// <summary>
/// Creates an instance of a Column
/// </summary>
public TableColumn()
{
_parentIndex = -1;
}
#endregion Constructors
//------------------------------------------------------
//
// Public Methods
//
//------------------------------------------------------
#region Public Methods
#endregion Public Methods
//------------------------------------------------------
//
// Public Properties
//
//------------------------------------------------------
#region Public Properties
/// <summary>
/// Width property.
/// </summary>
public GridLength Width
{
get { return (GridLength) GetValue(WidthProperty); }
set { SetValue(WidthProperty, value); }
}
/// <summary>
/// Background property.
/// </summary>
public Brush Background
{
get { return (Brush) GetValue(BackgroundProperty); }
set { SetValue(BackgroundProperty, value); }
}
#endregion Public Properties
//------------------------------------------------------
//
// Protected Methods
//
//------------------------------------------------------
#region Protected Methods
#endregion Protected Methods
//------------------------------------------------------
//
// Internal Methods
//
//------------------------------------------------------
#region Internal Methods
#region IIndexedChild implementation
/// <summary>
/// Callback used to notify about entering model tree.
/// </summary>
void IIndexedChild<Table>.OnEnterParentTree()
{
this.OnEnterParentTree();
}
/// <summary>
/// Callback used to notify about exitting model tree.
/// </summary>
void IIndexedChild<Table>.OnExitParentTree()
{
this.OnExitParentTree();
}
void IIndexedChild<Table>.OnAfterExitParentTree(Table parent)
{
}
int IIndexedChild<Table>.Index
{
get { return this.Index; }
set { this.Index = value; }
}
#endregion IIndexedChild implementation
/// <summary>
/// Callback used to notify the Cell about entering model tree.
/// </summary>
internal void OnEnterParentTree()
{
Table.InvalidateColumns();
}
/// <summary>
/// Callback used to notify the Cell about exitting model tree.
/// </summary>
internal void OnExitParentTree()
{
Table.InvalidateColumns();
}
#endregion Internal Methods
//------------------------------------------------------
//
// Internal Properties
//
//------------------------------------------------------
#region Internal Properties
/// <summary>
/// Table owner accessor
/// </summary>
internal Table Table { get { return Parent as Table; } }
/// <summary>
/// Column's index in the parents collection.
/// </summary>
internal int Index
{
get
{
return (_parentIndex);
}
set
{
Debug.Assert (value >= -1 && _parentIndex != value);
_parentIndex = value;
}
}
/// <summary>
/// DefaultWidth
/// </summary>
internal static GridLength DefaultWidth { get { return (new GridLength(0, GridUnitType.Auto)); } }
#endregion Internal Properties
//------------------------------------------------------
//
// Private Methods
//
//------------------------------------------------------
#region Private Methods
/// <summary>
/// <see cref="DependencyProperty.ValidateValueCallback"/>
/// </summary>
private static bool IsValidWidth(object value)
{
GridLength gridLength = (GridLength) value;
if ((gridLength.GridUnitType == GridUnitType.Pixel || gridLength.GridUnitType == GridUnitType.Star) &&
(gridLength.Value < 0.0))
{
return false;
}
double maxPixel = Math.Min(1000000, PTS.MaxPageSize);
if (gridLength.GridUnitType == GridUnitType.Pixel && (gridLength.Value > maxPixel))
{
return false;
}
return true;
}
#endregion Private Methods
//------------------------------------------------------
//
// Private Fields
//
//------------------------------------------------------
#region Private Fields
private int _parentIndex; // column's index in parent's children collection
#endregion Private Fields
//------------------------------------------------------
//
// Properties
//
//------------------------------------------------------
#region Properties
/// <summary>
/// Width property.
/// </summary>
public static readonly DependencyProperty WidthProperty =
DependencyProperty.Register(
"Width",
typeof(GridLength),
typeof(TableColumn),
new FrameworkPropertyMetadata(
new GridLength(0, GridUnitType.Auto),
FrameworkPropertyMetadataOptions.AffectsMeasure,
new PropertyChangedCallback(OnWidthChanged)),
new ValidateValueCallback(IsValidWidth));
/// <summary>
/// DependencyProperty for <see cref="Background" /> property.
/// </summary>
public static readonly DependencyProperty BackgroundProperty =
Panel.BackgroundProperty.AddOwner(
typeof(TableColumn),
new FrameworkPropertyMetadata(
null,
FrameworkPropertyMetadataOptions.AffectsRender,
new PropertyChangedCallback(OnBackgroundChanged)));
#endregion Properties
//------------------------------------------------------
//
// Static Initialization
//
//------------------------------------------------------
#region Static Initialization
/// <summary>
/// Called when the value of the WidthProperty changes
/// </summary>
private static void OnWidthChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
Table table = ((TableColumn) d).Table;
if(table != null)
{
table.InvalidateColumns();
}
}
/// <summary>
/// Called when the value of the BackgroundProperty changes
/// </summary>
private static void OnBackgroundChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
{
Table table = ((TableColumn) d).Table;
if(table != null)
{
table.InvalidateColumns();
}
}
#endregion Static Initialization
}
}
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