TableColumn.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Framework / System / Windows / Documents / TableColumn.cs / 1 / TableColumn.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// 
//    Copyright (C) Microsoft Corporation.  All rights reserved.
//  
//
// 
// Description: Table column object implementation. 
//
// History: 
//  06/19/2003 : [....] - Created
//
//---------------------------------------------------------------------------
using System; 
using System.Diagnostics;
using System.Windows.Threading; 
 
using System.Windows;
using System.Windows.Controls; 
using System.Windows.Documents;
using System.Windows.Media;
using MS.Internal.PtsHost.UnsafeNativeMethods; // PTS restrictions
 
namespace System.Windows.Documents
{ 
    ///  
    /// Table column.
    ///  
    public class TableColumn : FrameworkContentElement
    {
        //-----------------------------------------------------
        // 
        //  Constructors
        // 
        //----------------------------------------------------- 

        #region Constructors 

        /// 
        /// Creates an instance of a Column
        ///  
        public TableColumn()
        { 
            _parentIndex = -1; 
        }
 
        #endregion Constructors

        //------------------------------------------------------
        // 
        //  Public Methods
        // 
        //----------------------------------------------------- 

        #region Public Methods 
        #endregion Public Methods

        //------------------------------------------------------
        // 
        //  Public Properties
        // 
        //------------------------------------------------------ 

        #region Public Properties 

        /// 
        /// Width property.
        ///  
        public GridLength Width
        { 
            get { return (GridLength) GetValue(WidthProperty); } 
            set { SetValue(WidthProperty, value); }
        } 

        /// 
        /// Background property.
        ///  
        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

        /// 
        /// Callback used to notify the Cell about entering model tree. 
        /// 
        internal void OnEnterParentTree() 
        { 
            Table.InvalidateColumns();
        } 

        /// 
        /// Callback used to notify the Cell about exitting model tree.
        ///  
        internal void OnExitParentTree()
        { 
            Table.InvalidateColumns(); 
        }
 
        #endregion Internal Methods

        //-----------------------------------------------------
        // 
        //  Internal Properties
        // 
        //------------------------------------------------------ 

        #region Internal Properties 

        /// 
        /// Table owner accessor
        ///  
        internal Table Table { get { return Parent as Table; } }
 
        ///  
        /// Column's index in the parents collection.
        ///  
        internal int Index
        {
            get
            { 
                return (_parentIndex);
            } 
            set 
            {
                Debug.Assert (value >= -1 && _parentIndex != value); 
                _parentIndex = value;
            }
        }
 
        /// 
        /// DefaultWidth 
        ///  
        internal static GridLength DefaultWidth { get { return (new GridLength(0, GridUnitType.Auto)); } }
 
        #endregion Internal Properties

        //-----------------------------------------------------
        // 
        //  Private Methods
        // 
        //------------------------------------------------------ 

        #region Private Methods 

        /// 
        /// 
        ///  
        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 

        ///  
        /// Width property. 
        /// 
        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)); 

        /// 
        /// DependencyProperty for  property.
        ///  
        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
 
        /// 
        /// Called when the value of the WidthProperty changes 
        ///  
        private static void OnWidthChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        { 
            Table table = ((TableColumn) d).Table;
            if(table != null)
            {
                table.InvalidateColumns(); 
            }
        } 
 
        /// 
        /// Called when the value of the BackgroundProperty changes 
        /// 
        private static void OnBackgroundChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
        {
            Table table = ((TableColumn) d).Table; 
            if(table != null)
            { 
                table.InvalidateColumns(); 
            }
        } 

        #endregion Static Initialization

    } 
}

// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
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TableColumn.cs source code in C# .NET

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