DocumentPage.cs source code in C# .NET

                        Code:
                         / DotNET / DotNET / 8.0 / untmp / WIN_WINDOWS / lh_tools_devdiv_wpf / Windows / wcp / Core / System / Windows / Documents / DocumentPage.cs / 1 / DocumentPage.cs
                        
                        
                            //---------------------------------------------------------------------------- 
//
// Copyright (C) Microsoft Corporation.  All rights reserved.
//
// File: DocumentPage.cs 
//
// Description: Base for pages returned from the Paginator.GetPage. 
// 
// History:
//  05/02/2003 : [....] - created. 
//  09/28/2004 : [....] - updated pagination model.
//  08/29/2005 : [....] - updated pagination model.
//
//--------------------------------------------------------------------------- 

using System.Windows.Media;     // Visual 
 
namespace System.Windows.Documents
{ 
    /// 
    /// Base for pages returned from the Paginator.GetPage.
    /// 
    public class DocumentPage : IDisposable 
    {
        //------------------------------------------------------------------- 
        // 
        //  Constructors
        // 
        //-------------------------------------------------------------------

        #region Constructors
 
        /// 
        /// Public constructor. 
        ///  
        /// The visual representation of this page.
        public DocumentPage(Visual visual) 
        {
            _visual = visual;
            _pageSize = Size.Empty;
            _bleedBox = Rect.Empty; 
            _contentBox = Rect.Empty;
        } 
 
        /// 
        /// Public constructor. 
        /// 
        /// The visual representation of this page.
        /// The size of the page, including margins.
        /// The bounds the ink drawn by the page. 
        /// The bounds of the content within the page.
        public DocumentPage(Visual visual, Size pageSize, Rect bleedBox, Rect contentBox) 
        { 
            _visual = visual;
            _pageSize = pageSize; 
            _bleedBox = bleedBox;
            _contentBox = contentBox;
        }
 
        #endregion Constructors
 
        //-------------------------------------------------------------------- 
        //
        //  Public Methods 
        //
        //-------------------------------------------------------------------

        #region Public Methods 

        ///  
        /// Dispose the page. 
        /// 
        public virtual void Dispose() 
        {
            _visual = null;
            _pageSize = Size.Empty;
            _bleedBox = Rect.Empty; 
            _contentBox = Rect.Empty;
            OnPageDestroyed(EventArgs.Empty); 
        } 

        #endregion Public Methods 

        //--------------------------------------------------------------------
        //
        //  Public Properties 
        //
        //-------------------------------------------------------------------- 
 
        #region Public Properties
 
        /// 
        /// The visual representation of this page.
        /// 
        public virtual Visual Visual 
        {
            get { return _visual;  } 
        } 

        ///  
        /// The size of the page, including margins.
        /// 
        public virtual Size Size
        { 
            get
            { 
                if (_pageSize == Size.Empty && _visual != null) 
                {
                    return VisualTreeHelper.GetContentBounds(_visual).Size; 
                }
                return _pageSize;
            }
        } 

        ///  
        /// The bounds the ink drawn by the page, relative to the page size. 
        /// 
        public virtual Rect BleedBox 
        {
            get
            {
                if (_bleedBox == Rect.Empty) 
                {
                    return new Rect(this.Size); 
                } 
                return _bleedBox;
            } 
        }

        /// 
        /// The bounds of the content within the page, relative to the page size. 
        /// 
        public virtual Rect ContentBox 
        { 
            get
            { 
                if (_contentBox == Rect.Empty)
                {
                    return new Rect(this.Size);
                } 
                return _contentBox;
            } 
        } 

        ///  
        /// Static representation of a non-existent page.
        /// 
        public static readonly DocumentPage Missing = new MissingDocumentPage();
 
        #endregion Public Properties
 
        //------------------------------------------------------------------- 
        //
        //  Public Events 
        //
        //--------------------------------------------------------------------

        #region Public Events 

        ///  
        /// Called when the Visual for this page has been destroyed and 
        /// can no longer be used for display.
        ///  
        public event EventHandler PageDestroyed;

        #endregion Public Events
 
        //-------------------------------------------------------------------
        // 
        //  Protected Methods 
        //
        //------------------------------------------------------------------- 

        #region Protected Methods

        ///  
        /// Override for subclasses that wish to add logic when this event is fired.
        ///  
        /// Event arguments for the PageDestroyed event. 
        protected void OnPageDestroyed(EventArgs e)
        { 
            if (this.PageDestroyed != null)
            {
                this.PageDestroyed(this, e);
            } 
        }
 
        ///  
        /// Sets the visual representation of this page.
        ///  
        /// The visual representation of this page.
        protected void SetVisual(Visual visual)
        {
            _visual = visual; 
        }
 
        ///  
        /// Sets the size of the page.
        ///  
        /// The size of the page, including margins.
        protected void SetSize(Size size)
        {
            _pageSize = size; 
        }
 
        ///  
        /// Sets the bounds the ink drawn by the page.
        ///  
        /// The bounds the ink drawn by the page, relative to the page size.
        protected void SetBleedBox(Rect bleedBox)
        {
            _bleedBox = bleedBox; 
        }
 
        ///  
        /// Sets the bounds of the content within the page.
        ///  
        /// The bounds of the content within the page, relative to the page size.
        protected void SetContentBox(Rect contentBox)
        {
            _contentBox = contentBox; 
        }
 
        #endregion Protected Methods 

        //------------------------------------------------------------------- 
        //
        //  Protected Fields
        //
        //-------------------------------------------------------------------- 

        #region Protected Fields 
 
        /// 
        /// The visual representation of this page. 
        /// 
        private Visual _visual;

        ///  
        /// The size of the page, including margins.
        ///  
        private Size _pageSize; 

        ///  
        /// The bounds the ink drawn by the page, relative to the page size.
        /// 
        private Rect _bleedBox;
 
        /// 
        /// The bounds of the content within the page, relative to the page size. 
        ///  
        private Rect _contentBox;
 
        #endregion Protected Fields

        //-------------------------------------------------------------------
        // 
        //  Missing
        // 
        //-------------------------------------------------------------------- 

        #region Missing 

        private sealed class MissingDocumentPage : DocumentPage
        {
            public MissingDocumentPage() : base(null, Size.Empty, Rect.Empty, Rect.Empty) { } 
            public override void Dispose() {}
        } 
 
        #endregion Missing
    } 
}

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

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