Code:
/ Net / Net / 3.5.50727.3053 / DEVDIV / depot / DevDiv / releases / Orcas / SP / wpf / src / Framework / MS / Internal / documents / DocumentGridPage.cs / 1 / DocumentGridPage.cs
//----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
// File: DocumentGridPage.cs
//
// Description: DocumentGridPage displays a graphical representation of an
// DocumentPaginator page including drop-shadow
// and is used by DocumentGrid.
//
// History:
// 10/29/2004 : jdersch - created
//
//---------------------------------------------------------------------------
using MS.Internal.Annotations.Anchoring;
using MS.Win32;
using System.Threading;
using System.Windows;
using System.Windows.Annotations;
using System.Windows.Annotations.Storage;
using System.Windows.Automation;
using System.Windows.Automation.Provider;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Documents;
using System.Windows.Shapes;
using System.Windows.Input;
using System.Windows.Media;
using System;
using System.Collections;
using System.Diagnostics;
namespace MS.Internal.Documents
{
///
///
///
internal class DocumentGridPage : FrameworkElement, IDisposable
{
//-------------------------------------------------------------------
//
// Constructors
//
//-------------------------------------------------------------------
#region Constructors
///
/// Standard constructor.
///
public DocumentGridPage(DocumentPaginator paginator) : base()
{
_paginator = paginator;
//Attach the GetPageCompleted event handler to the paginator so we can
//use it to keep track of whether our page has been loaded yet.
_paginator.GetPageCompleted += new GetPageCompletedEventHandler(OnGetPageCompleted);
//Set up the static elements of our Visual Tree.
Init();
}
#endregion
//--------------------------------------------------------------------
//
// Public Properties
//
//-------------------------------------------------------------------
#region Public Properties
///
/// The DocumentPage for the displayed page.
///
public DocumentPage DocumentPage
{
get
{
CheckDisposed();
return _documentPageView.DocumentPage;
}
}
///
/// The page number displayed.
///
public int PageNumber
{
get
{
CheckDisposed();
return _documentPageView.PageNumber;
}
set
{
CheckDisposed();
if (_documentPageView.PageNumber != value)
{
_documentPageView.PageNumber = value;
}
}
}
///
/// The DocumentPageView displayed by this DocumentGridPage
///
public DocumentPageView DocumentPageView
{
get
{
CheckDisposed();
return _documentPageView;
}
}
///
/// Whether to show the border and drop shadow around the page.
///
///
/// Whether the requested page is loaded.
///
public bool IsPageLoaded
{
get
{
CheckDisposed();
return _loaded;
}
}
//--------------------------------------------------------------------
//
// Public Events
//
//--------------------------------------------------------------------
#region Public Events
///
/// Fired when the document is finished paginating.
///
public event EventHandler PageLoaded;
#endregion Public Events
#endregion Public Properties
//-------------------------------------------------------------------
//
// Protected Methods
//
//--------------------------------------------------------------------
#region Protected Methods
///
/// Derived class must implement to support Visual children. The method must return
/// the child at the specified index. Index must be between 0 and GetVisualChildrenCount-1.
///
/// By default a Visual does not have any children.
///
/// Remark:
/// During this virtual call it is not valid to modify the Visual tree.
///
protected override Visual GetVisualChild(int index)
{
CheckDisposed();
// count is either 0 or 3
if(VisualChildrenCount != 0)
{
switch(index)
{
case 0:
return _dropShadowRight;
case 1:
return _dropShadowBottom;
case 2:
return _pageBorder;
default:
throw new ArgumentOutOfRangeException("index", index, SR.Get(SRID.Visual_ArgumentOutOfRange));
}
}
throw new ArgumentOutOfRangeException("index", index, SR.Get(SRID.Visual_ArgumentOutOfRange));
}
///
/// Derived classes override this property to enable the Visual code to enumerate
/// the Visual children. Derived classes need to return the number of children
/// from this method.
///
/// By default a Visual does not have any children.
///
/// Remark: During this virtual method the Visual tree must not be modified.
///
protected override int VisualChildrenCount
{
get
{
if(!_disposed && hasAddedChildren)
return 3;
else
return 0;
}
}
///
/// Content measurement.
///
/// Available size that parent can give to the child. This is soft constraint.
/// The DocumentGridPage's desired size.
protected override sealed Size MeasureOverride(Size availableSize)
{
CheckDisposed();
if(!hasAddedChildren)
{
//Add the drop shadow
this.AddVisualChild(_dropShadowRight);
this.AddVisualChild(_dropShadowBottom);
//Add the page (inside the pageBorder)
this.AddVisualChild(_pageBorder);
hasAddedChildren = true;
}
//Show / hide the border and drop shadow based on the current
//state of the ShowPageBorders property.
if (ShowPageBorders)
{
_pageBorder.BorderThickness = _pageBorderVisibleThickness;
_pageBorder.Background = Brushes.White;
_dropShadowRight.Opacity = _dropShadowOpacity;
_dropShadowBottom.Opacity = _dropShadowOpacity;
}
else
{
_pageBorder.BorderThickness = _pageBorderInvisibleThickness;
_pageBorder.Background = Brushes.Transparent;
_dropShadowRight.Opacity = 0.0;
_dropShadowBottom.Opacity = 0.0;
}
//Measure our children.
_dropShadowRight.Measure(availableSize);
_dropShadowBottom.Measure(availableSize);
_pageBorder.Measure(availableSize);
//Set the Page Zoom on the DocumentPageView to the ratio between our measure constraint
//and the actual size of the page; this will cause the DPV to scale our page appropriately.
if (DocumentPage.Size != Size.Empty && DocumentPage.Size.Width != 0.0 )
{
_documentPageView.SetPageZoom(availableSize.Width / DocumentPage.Size.Width);
}
return availableSize;
}
///
/// Content arrangement.
///
/// The final size that element should use to arrange itself and its children.
protected override sealed Size ArrangeOverride(Size arrangeSize)
{
CheckDisposed();
//Arrange the page, no offset.
_pageBorder.Arrange(new Rect(new Point(0.0,0.0), arrangeSize));
//Arrange the drop shadow parts along the right
//and bottom edges of the page.
//Right edge - as tall as the page (minus the shadow width so we don't overlap
//with the bottom edge), 5px wide. Offset vertically by 5px.
_dropShadowRight.Arrange(
new Rect(
new Point(arrangeSize.Width, _dropShadowWidth),
new Size(_dropShadowWidth, Math.Max( 0.0, arrangeSize.Height - _dropShadowWidth))
));
//Bottom edge - 5px tall, and as wide as the page. Offset horizontally by 5px.
_dropShadowBottom.Arrange(
new Rect(
new Point(_dropShadowWidth, arrangeSize.Height),
new Size(arrangeSize.Width, _dropShadowWidth)
));
base.ArrangeOverride(arrangeSize);
return arrangeSize;
}
#endregion Protected Methods
//-------------------------------------------------------------------
//
// Private Methods
//
//-------------------------------------------------------------------
#region Private Methods
///
/// Creates the static members of DocumentGridPage's Visual Tree.
///
private void Init()
{
//Create the DocumentPageView, which will display our
//content.
_documentPageView = new DocumentPageView();
_documentPageView.ClipToBounds = true;
_documentPageView.StretchDirection = StretchDirection.Both;
_documentPageView.PageNumber = int.MaxValue;
//Create the border that goes around the page content.
_pageBorder = new Border();
_pageBorder.BorderBrush = Brushes.Black;
_pageBorder.Child = _documentPageView;
//Create the drop shadow that goes behind the page, made
//of two rectangles in an "L" shape.
_dropShadowRight = new Rectangle();
_dropShadowRight.Fill = Brushes.Black;
_dropShadowRight.Opacity = _dropShadowOpacity;
_dropShadowBottom = new Rectangle();
_dropShadowBottom.Fill = Brushes.Black;
_dropShadowBottom.Opacity = _dropShadowOpacity;
_loaded = false;
}
///
/// Handles the GetPageCompleted event raised by the DocumentPaginator.
/// At this point, we'll set the _loaded flag to indicate the page is loaded
/// and fire the PageLoaded event.
///
/// Source of the event.
/// Details about this event.
private void OnGetPageCompleted(object sender, GetPageCompletedEventArgs e)
{
//If the GetPageCompleted action completed successfully
//and is our page then we'll set the flag and fire the event.
if (!_disposed &&
e != null &&
!e.Cancelled &&
e.Error == null &&
e.PageNumber != int.MaxValue &&
e.PageNumber == this.PageNumber &&
e.DocumentPage != null &&
e.DocumentPage != DocumentPage.Missing)
{
_loaded = true;
if (PageLoaded != null)
{
PageLoaded(this, EventArgs.Empty);
}
}
}
///
/// Dispose the object.
///
protected void Dispose()
{
if (!_disposed)
{
_disposed = true;
//Detach the GetPageCompleted event from the content.
if (_paginator != null)
{
_paginator.GetPageCompleted -= new GetPageCompletedEventHandler(OnGetPageCompleted);
_paginator = null;
}
//Dispose our DocumentPageView.
IDisposable dpv = _documentPageView as IDisposable;
if (dpv != null )
{
dpv.Dispose();
}
}
}
///
/// Checks if the instance is already disposed, throws if so.
///
private void CheckDisposed()
{
if (_disposed)
{
throw new ObjectDisposedException(typeof(DocumentPageView).ToString());
}
}
#endregion Private Methods
#region IDisposable Members
///
/// Dispose the object.
///
void IDisposable.Dispose()
{
this.Dispose();
}
#endregion IDisposable Members
//-------------------------------------------------------------------
//
// Private Fields
//
//--------------------------------------------------------------------
#region Private Fields
private bool hasAddedChildren;
private DocumentPaginator _paginator;
private DocumentPageView _documentPageView;
private Rectangle _dropShadowRight;
private Rectangle _dropShadowBottom;
private Border _pageBorder;
private bool _showPageBorders;
private bool _loaded;
//Constants
private const double _dropShadowOpacity = 0.35;
private const double _dropShadowWidth = 5.0;
private readonly Thickness _pageBorderVisibleThickness = new Thickness(1, 1, 1, 1);
private readonly Thickness _pageBorderInvisibleThickness = new Thickness(0, 0, 0, 0);
private bool _disposed;
#endregion Private Fields
}
}
// File provided for Reference Use Only by Microsoft Corporation (c) 2007.
// Copyright (c) Microsoft Corporation. All rights reserved.
//----------------------------------------------------------------------------
//
// Copyright (C) Microsoft Corporation. All rights reserved.
//
// File: DocumentGridPage.cs
//
// Description: DocumentGridPage displays a graphical representation of an
// DocumentPaginator page including drop-shadow
// and is used by DocumentGrid.
//
// History:
// 10/29/2004 : jdersch - created
//
//---------------------------------------------------------------------------
using MS.Internal.Annotations.Anchoring;
using MS.Win32;
using System.Threading;
using System.Windows;
using System.Windows.Annotations;
using System.Windows.Annotations.Storage;
using System.Windows.Automation;
using System.Windows.Automation.Provider;
using System.Windows.Controls;
using System.Windows.Controls.Primitives;
using System.Windows.Documents;
using System.Windows.Shapes;
using System.Windows.Input;
using System.Windows.Media;
using System;
using System.Collections;
using System.Diagnostics;
namespace MS.Internal.Documents
{
///
///
///
internal class DocumentGridPage : FrameworkElement, IDisposable
{
//-------------------------------------------------------------------
//
// Constructors
//
//-------------------------------------------------------------------
#region Constructors
///
/// Standard constructor.
///
public DocumentGridPage(DocumentPaginator paginator) : base()
{
_paginator = paginator;
//Attach the GetPageCompleted event handler to the paginator so we can
//use it to keep track of whether our page has been loaded yet.
_paginator.GetPageCompleted += new GetPageCompletedEventHandler(OnGetPageCompleted);
//Set up the static elements of our Visual Tree.
Init();
}
#endregion
//--------------------------------------------------------------------
//
// Public Properties
//
//-------------------------------------------------------------------
#region Public Properties
///
/// The DocumentPage for the displayed page.
///
public DocumentPage DocumentPage
{
get
{
CheckDisposed();
return _documentPageView.DocumentPage;
}
}
///
/// The page number displayed.
///
public int PageNumber
{
get
{
CheckDisposed();
return _documentPageView.PageNumber;
}
set
{
CheckDisposed();
if (_documentPageView.PageNumber != value)
{
_documentPageView.PageNumber = value;
}
}
}
///
/// The DocumentPageView displayed by this DocumentGridPage
///
public DocumentPageView DocumentPageView
{
get
{
CheckDisposed();
return _documentPageView;
}
}
///
/// Whether to show the border and drop shadow around the page.
///
///
/// Whether the requested page is loaded.
///
public bool IsPageLoaded
{
get
{
CheckDisposed();
return _loaded;
}
}
//--------------------------------------------------------------------
//
// Public Events
//
//--------------------------------------------------------------------
#region Public Events
///
/// Fired when the document is finished paginating.
///
public event EventHandler PageLoaded;
#endregion Public Events
#endregion Public Properties
//-------------------------------------------------------------------
//
// Protected Methods
//
//--------------------------------------------------------------------
#region Protected Methods
///
/// Derived class must implement to support Visual children. The method must return
/// the child at the specified index. Index must be between 0 and GetVisualChildrenCount-1.
///
/// By default a Visual does not have any children.
///
/// Remark:
/// During this virtual call it is not valid to modify the Visual tree.
///
protected override Visual GetVisualChild(int index)
{
CheckDisposed();
// count is either 0 or 3
if(VisualChildrenCount != 0)
{
switch(index)
{
case 0:
return _dropShadowRight;
case 1:
return _dropShadowBottom;
case 2:
return _pageBorder;
default:
throw new ArgumentOutOfRangeException("index", index, SR.Get(SRID.Visual_ArgumentOutOfRange));
}
}
throw new ArgumentOutOfRangeException("index", index, SR.Get(SRID.Visual_ArgumentOutOfRange));
}
///
/// Derived classes override this property to enable the Visual code to enumerate
/// the Visual children. Derived classes need to return the number of children
/// from this method.
///
/// By default a Visual does not have any children.
///
/// Remark: During this virtual method the Visual tree must not be modified.
///
protected override int VisualChildrenCount
{
get
{
if(!_disposed && hasAddedChildren)
return 3;
else
return 0;
}
}
///
/// Content measurement.
///
/// Available size that parent can give to the child. This is soft constraint.
/// The DocumentGridPage's desired size.
protected override sealed Size MeasureOverride(Size availableSize)
{
CheckDisposed();
if(!hasAddedChildren)
{
//Add the drop shadow
this.AddVisualChild(_dropShadowRight);
this.AddVisualChild(_dropShadowBottom);
//Add the page (inside the pageBorder)
this.AddVisualChild(_pageBorder);
hasAddedChildren = true;
}
//Show / hide the border and drop shadow based on the current
//state of the ShowPageBorders property.
if (ShowPageBorders)
{
_pageBorder.BorderThickness = _pageBorderVisibleThickness;
_pageBorder.Background = Brushes.White;
_dropShadowRight.Opacity = _dropShadowOpacity;
_dropShadowBottom.Opacity = _dropShadowOpacity;
}
else
{
_pageBorder.BorderThickness = _pageBorderInvisibleThickness;
_pageBorder.Background = Brushes.Transparent;
_dropShadowRight.Opacity = 0.0;
_dropShadowBottom.Opacity = 0.0;
}
//Measure our children.
_dropShadowRight.Measure(availableSize);
_dropShadowBottom.Measure(availableSize);
_pageBorder.Measure(availableSize);
//Set the Page Zoom on the DocumentPageView to the ratio between our measure constraint
//and the actual size of the page; this will cause the DPV to scale our page appropriately.
if (DocumentPage.Size != Size.Empty && DocumentPage.Size.Width != 0.0 )
{
_documentPageView.SetPageZoom(availableSize.Width / DocumentPage.Size.Width);
}
return availableSize;
}
///
/// Content arrangement.
///
/// The final size that element should use to arrange itself and its children.
protected override sealed Size ArrangeOverride(Size arrangeSize)
{
CheckDisposed();
//Arrange the page, no offset.
_pageBorder.Arrange(new Rect(new Point(0.0,0.0), arrangeSize));
//Arrange the drop shadow parts along the right
//and bottom edges of the page.
//Right edge - as tall as the page (minus the shadow width so we don't overlap
//with the bottom edge), 5px wide. Offset vertically by 5px.
_dropShadowRight.Arrange(
new Rect(
new Point(arrangeSize.Width, _dropShadowWidth),
new Size(_dropShadowWidth, Math.Max( 0.0, arrangeSize.Height - _dropShadowWidth))
));
//Bottom edge - 5px tall, and as wide as the page. Offset horizontally by 5px.
_dropShadowBottom.Arrange(
new Rect(
new Point(_dropShadowWidth, arrangeSize.Height),
new Size(arrangeSize.Width, _dropShadowWidth)
));
base.ArrangeOverride(arrangeSize);
return arrangeSize;
}
#endregion Protected Methods
//-------------------------------------------------------------------
//
// Private Methods
//
//-------------------------------------------------------------------
#region Private Methods
///
/// Creates the static members of DocumentGridPage's Visual Tree.
///
private void Init()
{
//Create the DocumentPageView, which will display our
//content.
_documentPageView = new DocumentPageView();
_documentPageView.ClipToBounds = true;
_documentPageView.StretchDirection = StretchDirection.Both;
_documentPageView.PageNumber = int.MaxValue;
//Create the border that goes around the page content.
_pageBorder = new Border();
_pageBorder.BorderBrush = Brushes.Black;
_pageBorder.Child = _documentPageView;
//Create the drop shadow that goes behind the page, made
//of two rectangles in an "L" shape.
_dropShadowRight = new Rectangle();
_dropShadowRight.Fill = Brushes.Black;
_dropShadowRight.Opacity = _dropShadowOpacity;
_dropShadowBottom = new Rectangle();
_dropShadowBottom.Fill = Brushes.Black;
_dropShadowBottom.Opacity = _dropShadowOpacity;
_loaded = false;
}
///
/// Handles the GetPageCompleted event raised by the DocumentPaginator.
/// At this point, we'll set the _loaded flag to indicate the page is loaded
/// and fire the PageLoaded event.
///
/// Source of the event.
/// Details about this event.
private void OnGetPageCompleted(object sender, GetPageCompletedEventArgs e)
{
//If the GetPageCompleted action completed successfully
//and is our page then we'll set the flag and fire the event.
if (!_disposed &&
e != null &&
!e.Cancelled &&
e.Error == null &&
e.PageNumber != int.MaxValue &&
e.PageNumber == this.PageNumber &&
e.DocumentPage != null &&
e.DocumentPage != DocumentPage.Missing)
{
_loaded = true;
if (PageLoaded != null)
{
PageLoaded(this, EventArgs.Empty);
}
}
}
///
/// Dispose the object.
///
protected void Dispose()
{
if (!_disposed)
{
_disposed = true;
//Detach the GetPageCompleted event from the content.
if (_paginator != null)
{
_paginator.GetPageCompleted -= new GetPageCompletedEventHandler(OnGetPageCompleted);
_paginator = null;
}
//Dispose our DocumentPageView.
IDisposable dpv = _documentPageView as IDisposable;
if (dpv != null )
{
dpv.Dispose();
}
}
}
///
/// Checks if the instance is already disposed, throws if so.
///
private void CheckDisposed()
{
if (_disposed)
{
throw new ObjectDisposedException(typeof(DocumentPageView).ToString());
}
}
#endregion Private Methods
#region IDisposable Members
///
/// Dispose the object.
///
void IDisposable.Dispose()
{
this.Dispose();
}
#endregion IDisposable Members
//-------------------------------------------------------------------
//
// Private Fields
//
//--------------------------------------------------------------------
#region Private Fields
private bool hasAddedChildren;
private DocumentPaginator _paginator;
private DocumentPageView _documentPageView;
private Rectangle _dropShadowRight;
private Rectangle _dropShadowBottom;
private Border _pageBorder;
private bool _showPageBorders;
private bool _loaded;
//Constants
private const double _dropShadowOpacity = 0.35;
private const double _dropShadowWidth = 5.0;
private readonly Thickness _pageBorderVisibleThickness = new Thickness(1, 1, 1, 1);
private readonly Thickness _pageBorderInvisibleThickness = new Thickness(0, 0, 0, 0);
private bool _disposed;
#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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