Code:
/ 4.0 / 4.0 / DEVDIV_TFS / Dev10 / Releases / RTMRel / wpf / src / Framework / MS / Internal / documents / FlowDocumentView.cs / 1305600 / FlowDocumentView.cs
//---------------------------------------------------------------------------- // // Copyright (C) Microsoft Corporation. All rights reserved. // // File: FlowDocumentView.cs // // Description: Provides a view port for content of FlowDocument formatted // bottomless area. // // History: // 11/07/2005 : [....] - created. // //--------------------------------------------------------------------------- using System; // Object using System.Windows; // Size using System.Windows.Controls; // ScrollViewer using System.Windows.Controls.Primitives; // IScrollInfo using System.Windows.Documents; // FlowDocument using System.Windows.Media; // Visual using System.Windows.Media.Imaging; // RenderTargetBitmap using MS.Internal.PtsHost; // FlowDocumentPage using MS.Internal.Text; // TextDpi namespace MS.Internal.Documents { ////// Provides a view port for content of FlowDocument formatted bottomless area. /// internal class FlowDocumentView : FrameworkElement, IScrollInfo, IServiceProvider { //------------------------------------------------------------------- // // Constructors // //------------------------------------------------------------------- #region Constructors ////// Static Constructor /// static FlowDocumentView() { } ////// Constructor /// internal FlowDocumentView() { } #endregion Constructors //-------------------------------------------------------------------- // // Protected Methods // //------------------------------------------------------------------- #region Protected Methods ////// Content measurement. /// /// Constraint size. ///Computed desired size. protected sealed override Size MeasureOverride(Size constraint) { Size desiredSize = new Size(); if (_suspendLayout) { desiredSize = this.DesiredSize; } else if (Document != null) { // Create bottomless formatter, if necessary. EnsureFormatter(); // Format bottomless content. _formatter.Format(constraint); // DesiredSize is set to the calculated size of the page. // If hosted by ScrollViewer, desired size is limited to constraint. if (_scrollData != null) { desiredSize.Width = Math.Min(constraint.Width, _formatter.DocumentPage.Size.Width); desiredSize.Height = Math.Min(constraint.Height, _formatter.DocumentPage.Size.Height); } else { desiredSize = _formatter.DocumentPage.Size; } } return desiredSize; } ////// Content arrangement. /// /// Size that element should use to arrange itself and its children. protected sealed override Size ArrangeOverride(Size arrangeSize) { Rect viewport = Rect.Empty; Vector offset; bool invalidateScrollInfo = false; Size safeArrangeSize = arrangeSize; if (!_suspendLayout) { // Convert to TextDpi and convert back to double, to make sure that we are not // getting rounding errors later. TextDpi.SnapToTextDpi(ref safeArrangeSize); if (Document != null) { // Create bottomless formatter, if necessary. EnsureFormatter(); // Arrange bottomless content. if (_scrollData != null) { if (!DoubleUtil.AreClose(_scrollData.Viewport, safeArrangeSize)) { _scrollData.Viewport = safeArrangeSize; invalidateScrollInfo = true; } if (!DoubleUtil.AreClose(_scrollData.Extent, _formatter.DocumentPage.Size)) { _scrollData.Extent = _formatter.DocumentPage.Size; invalidateScrollInfo = true; // DocumentPage Size is calculated by converting double to int and then back to double. // This conversion may produce rounding errors and force us to show scrollbars in cases // when extent is within 1px from viewport. To workaround this issue, snap extent to viewport // if we are within 1px range. if (Math.Abs(_scrollData.ExtentWidth - _scrollData.ViewportWidth) < 1) { _scrollData.ExtentWidth = _scrollData.ViewportWidth; } if (Math.Abs(_scrollData.ExtentHeight - _scrollData.ViewportHeight) < 1) { _scrollData.ExtentHeight = _scrollData.ViewportHeight; } } offset = new Vector( Math.Max(0, Math.Min(_scrollData.ExtentWidth - _scrollData.ViewportWidth, _scrollData.HorizontalOffset)), Math.Max(0, Math.Min(_scrollData.ExtentHeight - _scrollData.ViewportHeight, _scrollData.VerticalOffset))); if (!DoubleUtil.AreClose(offset, _scrollData.Offset)) { _scrollData.Offset = offset; invalidateScrollInfo = true; } if (invalidateScrollInfo && _scrollData.ScrollOwner != null) { _scrollData.ScrollOwner.InvalidateScrollInfo(); } viewport = new Rect(_scrollData.HorizontalOffset, _scrollData.VerticalOffset, safeArrangeSize.Width, safeArrangeSize.Height); } _formatter.Arrange(safeArrangeSize, viewport); // Connect to visual tree. if (_pageVisual != _formatter.DocumentPage.Visual) { if (_textView != null) { _textView.OnPageConnected(); } if (_pageVisual != null) { RemoveVisualChild(_pageVisual); } _pageVisual = (PageVisual)_formatter.DocumentPage.Visual; AddVisualChild(_pageVisual); } // Set appropriate content offset if (_scrollData != null) { _pageVisual.Offset = new Vector(-_scrollData.HorizontalOffset, -_scrollData.VerticalOffset); } // DocumentPage.Visual is always returned in LeftToRight FlowDirection. // Hence, if the the current FlowDirection is RightToLeft, // mirroring transform need to be applied to the content. PtsHelper.UpdateMirroringTransform(FlowDirection, FlowDirection.LeftToRight, _pageVisual, safeArrangeSize.Width); } else { if (_pageVisual != null) { if (_textView != null) { _textView.OnPageDisconnected(); } RemoveVisualChild(_pageVisual); _pageVisual = null; } // Arrange bottomless content. if (_scrollData != null) { if (!DoubleUtil.AreClose(_scrollData.Viewport, safeArrangeSize)) { _scrollData.Viewport = safeArrangeSize; invalidateScrollInfo = true; } if (!DoubleUtil.AreClose(_scrollData.Extent, new Size())) { _scrollData.Extent = new Size(); invalidateScrollInfo = true; } if (!DoubleUtil.AreClose(_scrollData.Offset, new Vector())) { _scrollData.Offset = new Vector(); invalidateScrollInfo = true; } if (invalidateScrollInfo && _scrollData.ScrollOwner != null) { _scrollData.ScrollOwner.InvalidateScrollInfo(); } } } } return arrangeSize; } ////// Returns visual child at specified index. FlowDocumentView has just one child. /// protected override Visual GetVisualChild(int index) { if (index != 0) { throw new ArgumentOutOfRangeException("index", index, SR.Get(SRID.Visual_ArgumentOutOfRange)); } return _pageVisual; } #endregion Protected Methods //-------------------------------------------------------------------- // // Protected Properties // //-------------------------------------------------------------------- #region Protected Properties ////// Returns number of children. FlowDocumentView has just one child. /// protected override int VisualChildrenCount { get { return _pageVisual == null ? 0 : 1; } } #endregion Protected Properties //------------------------------------------------------------------- // // Internal Methods // //-------------------------------------------------------------------- #region Internal Methods ////// Suspends page layout. /// internal void SuspendLayout() { _suspendLayout = true; if (_pageVisual != null) { _pageVisual.Opacity = 0.5; } } ////// Resumes page layout. /// internal void ResumeLayout() { _suspendLayout = false; if (_pageVisual != null) { _pageVisual.Opacity = 1.0; } InvalidateMeasure(); } #endregion Internal Methods //------------------------------------------------------------------- // // Internal Properties // //------------------------------------------------------------------- #region Internal Properties ////// BreakRecordTable. /// internal FlowDocument Document { get { return _document; } set { if (_formatter != null) { HandleFormatterSuspended(_formatter, EventArgs.Empty); } _suspendLayout = false; _textView = null; _document = value; InvalidateMeasure(); InvalidateVisual(); //ensure re-rendering } } ////// DocumentPage. /// internal FlowDocumentPage DocumentPage { get { if (_document != null) { EnsureFormatter(); return _formatter.DocumentPage; } return null; } } #endregion Internal Properties //------------------------------------------------------------------- // // Private Methods // //-------------------------------------------------------------------- #region Private Methods ////// Ensures valid instance of FlowDocumentFormatter. /// private void EnsureFormatter() { Invariant.Assert(_document != null); if (_formatter == null) { _formatter = _document.BottomlessFormatter; _formatter.ContentInvalidated += new EventHandler(HandleContentInvalidated); _formatter.Suspended += new EventHandler(HandleFormatterSuspended); } Invariant.Assert(_formatter == _document.BottomlessFormatter); } ////// Responds to content invalidation. /// private void HandleContentInvalidated(object sender, EventArgs e) { Invariant.Assert(sender == _formatter); InvalidateMeasure(); InvalidateVisual(); //ensure re-rendering } ////// Responds to formatter suspention. /// private void HandleFormatterSuspended(object sender, EventArgs e) { Invariant.Assert(sender == _formatter); // Disconnect formatter. _formatter.ContentInvalidated -= new EventHandler(HandleContentInvalidated); _formatter.Suspended -= new EventHandler(HandleFormatterSuspended); _formatter = null; // Disconnect any content associated with the formatter. if (_pageVisual != null && !_suspendLayout) { if (_textView != null) { _textView.OnPageDisconnected(); } RemoveVisualChild(_pageVisual); _pageVisual = null; } } #endregion Private Methods //------------------------------------------------------------------- // // Private Fields // //-------------------------------------------------------------------- #region Private Fields private FlowDocument _document; // Hosted FlowDocument private PageVisual _pageVisual; // Visual representing the content private FlowDocumentFormatter _formatter; // Bottomless formatter associated with FlowDocument private ScrollData _scrollData; // IScrollInfo related data, if hosted by ScrollViewer private DocumentPageTextView _textView; // TextView associated with this element. private bool _suspendLayout; // Layout of the page is suspended. #endregion Private Fields //-------------------------------------------------------------------- // // IScrollInfo Members // //------------------------------------------------------------------- #region IScrollInfo Members ////// void IScrollInfo.LineUp() { if (_scrollData != null) { _scrollData.LineUp(this); } } ////// /// void IScrollInfo.LineDown() { if (_scrollData != null) { _scrollData.LineDown(this); } } ////// /// void IScrollInfo.LineLeft() { if (_scrollData != null) { _scrollData.LineLeft(this); } } ////// /// void IScrollInfo.LineRight() { if (_scrollData != null) { _scrollData.LineRight(this); } } ////// /// void IScrollInfo.PageUp() { if (_scrollData != null) { _scrollData.PageUp(this); } } ////// /// void IScrollInfo.PageDown() { if (_scrollData != null) { _scrollData.PageDown(this); } } ////// /// void IScrollInfo.PageLeft() { if (_scrollData != null) { _scrollData.PageLeft(this); } } ////// /// void IScrollInfo.PageRight() { if (_scrollData != null) { _scrollData.PageRight(this); } } ////// /// void IScrollInfo.MouseWheelUp() { if (_scrollData != null) { _scrollData.MouseWheelUp(this); } } ////// /// void IScrollInfo.MouseWheelDown() { if (_scrollData != null) { _scrollData.MouseWheelDown(this); } } ////// /// void IScrollInfo.MouseWheelLeft() { if (_scrollData != null) { _scrollData.MouseWheelLeft(this); } } ////// /// void IScrollInfo.MouseWheelRight() { if (_scrollData != null) { _scrollData.MouseWheelRight(this); } } ////// /// void IScrollInfo.SetHorizontalOffset(double offset) { if (_scrollData != null) { _scrollData.SetHorizontalOffset(this, offset); } } ////// /// void IScrollInfo.SetVerticalOffset(double offset) { if (_scrollData != null) { _scrollData.SetVerticalOffset(this, offset); } } ////// /// Rect IScrollInfo.MakeVisible(Visual visual, Rect rectangle) { if (_scrollData == null) { rectangle = Rect.Empty; } else { rectangle = _scrollData.MakeVisible(this, visual, rectangle); } return rectangle; } ////// /// bool IScrollInfo.CanVerticallyScroll { get { return (_scrollData != null) ? _scrollData.CanVerticallyScroll : false; } set { if (_scrollData != null) { _scrollData.CanVerticallyScroll = value; } } } ////// /// bool IScrollInfo.CanHorizontallyScroll { get { return (_scrollData != null) ? _scrollData.CanHorizontallyScroll : false; } set { if (_scrollData != null) { _scrollData.CanHorizontallyScroll = value; } } } ////// /// double IScrollInfo.ExtentWidth { get { return (_scrollData != null) ? _scrollData.ExtentWidth : 0; } } ////// /// double IScrollInfo.ExtentHeight { get { return (_scrollData != null) ? _scrollData.ExtentHeight : 0; } } ////// /// double IScrollInfo.ViewportWidth { get { return (_scrollData != null) ? _scrollData.ViewportWidth : 0; } } ////// /// double IScrollInfo.ViewportHeight { get { return (_scrollData != null) ? _scrollData.ViewportHeight : 0; } } ////// /// double IScrollInfo.HorizontalOffset { get { return (_scrollData != null) ? _scrollData.HorizontalOffset : 0; } } ////// /// double IScrollInfo.VerticalOffset { get { return (_scrollData != null) ? _scrollData.VerticalOffset : 0; } } ////// /// ScrollViewer IScrollInfo.ScrollOwner { get { return (_scrollData != null) ? _scrollData.ScrollOwner : null; } set { if (_scrollData == null) { // Create cached scroll info. _scrollData = new ScrollData(); } _scrollData.SetScrollOwner(this, value); } } #endregion IScrollInfo Members //-------------------------------------------------------------------- // // IServiceProvider Members // //------------------------------------------------------------------- #region IServiceProvider Members ////// /// Gets the service object of the specified type. /// /// /// An object that specifies the type of service object to get. /// ////// A service object of type serviceType. A null reference if there is no /// service object of type serviceType. /// object IServiceProvider.GetService(Type serviceType) { object service = null; if (serviceType == typeof(ITextView)) { if (_textView == null && _document != null) { _textView = new DocumentPageTextView(this, _document.StructuralCache.TextContainer); } service = _textView; } else if (serviceType == typeof(ITextContainer)) { if (Document != null) { service = Document.StructuralCache.TextContainer as TextContainer; } } return service; } #endregion IServiceProvider Members } } // 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: FlowDocumentView.cs // // Description: Provides a view port for content of FlowDocument formatted // bottomless area. // // History: // 11/07/2005 : [....] - created. // //--------------------------------------------------------------------------- using System; // Object using System.Windows; // Size using System.Windows.Controls; // ScrollViewer using System.Windows.Controls.Primitives; // IScrollInfo using System.Windows.Documents; // FlowDocument using System.Windows.Media; // Visual using System.Windows.Media.Imaging; // RenderTargetBitmap using MS.Internal.PtsHost; // FlowDocumentPage using MS.Internal.Text; // TextDpi namespace MS.Internal.Documents { ////// Provides a view port for content of FlowDocument formatted bottomless area. /// internal class FlowDocumentView : FrameworkElement, IScrollInfo, IServiceProvider { //------------------------------------------------------------------- // // Constructors // //------------------------------------------------------------------- #region Constructors ////// Static Constructor /// static FlowDocumentView() { } ////// Constructor /// internal FlowDocumentView() { } #endregion Constructors //-------------------------------------------------------------------- // // Protected Methods // //------------------------------------------------------------------- #region Protected Methods ////// Content measurement. /// /// Constraint size. ///Computed desired size. protected sealed override Size MeasureOverride(Size constraint) { Size desiredSize = new Size(); if (_suspendLayout) { desiredSize = this.DesiredSize; } else if (Document != null) { // Create bottomless formatter, if necessary. EnsureFormatter(); // Format bottomless content. _formatter.Format(constraint); // DesiredSize is set to the calculated size of the page. // If hosted by ScrollViewer, desired size is limited to constraint. if (_scrollData != null) { desiredSize.Width = Math.Min(constraint.Width, _formatter.DocumentPage.Size.Width); desiredSize.Height = Math.Min(constraint.Height, _formatter.DocumentPage.Size.Height); } else { desiredSize = _formatter.DocumentPage.Size; } } return desiredSize; } ////// Content arrangement. /// /// Size that element should use to arrange itself and its children. protected sealed override Size ArrangeOverride(Size arrangeSize) { Rect viewport = Rect.Empty; Vector offset; bool invalidateScrollInfo = false; Size safeArrangeSize = arrangeSize; if (!_suspendLayout) { // Convert to TextDpi and convert back to double, to make sure that we are not // getting rounding errors later. TextDpi.SnapToTextDpi(ref safeArrangeSize); if (Document != null) { // Create bottomless formatter, if necessary. EnsureFormatter(); // Arrange bottomless content. if (_scrollData != null) { if (!DoubleUtil.AreClose(_scrollData.Viewport, safeArrangeSize)) { _scrollData.Viewport = safeArrangeSize; invalidateScrollInfo = true; } if (!DoubleUtil.AreClose(_scrollData.Extent, _formatter.DocumentPage.Size)) { _scrollData.Extent = _formatter.DocumentPage.Size; invalidateScrollInfo = true; // DocumentPage Size is calculated by converting double to int and then back to double. // This conversion may produce rounding errors and force us to show scrollbars in cases // when extent is within 1px from viewport. To workaround this issue, snap extent to viewport // if we are within 1px range. if (Math.Abs(_scrollData.ExtentWidth - _scrollData.ViewportWidth) < 1) { _scrollData.ExtentWidth = _scrollData.ViewportWidth; } if (Math.Abs(_scrollData.ExtentHeight - _scrollData.ViewportHeight) < 1) { _scrollData.ExtentHeight = _scrollData.ViewportHeight; } } offset = new Vector( Math.Max(0, Math.Min(_scrollData.ExtentWidth - _scrollData.ViewportWidth, _scrollData.HorizontalOffset)), Math.Max(0, Math.Min(_scrollData.ExtentHeight - _scrollData.ViewportHeight, _scrollData.VerticalOffset))); if (!DoubleUtil.AreClose(offset, _scrollData.Offset)) { _scrollData.Offset = offset; invalidateScrollInfo = true; } if (invalidateScrollInfo && _scrollData.ScrollOwner != null) { _scrollData.ScrollOwner.InvalidateScrollInfo(); } viewport = new Rect(_scrollData.HorizontalOffset, _scrollData.VerticalOffset, safeArrangeSize.Width, safeArrangeSize.Height); } _formatter.Arrange(safeArrangeSize, viewport); // Connect to visual tree. if (_pageVisual != _formatter.DocumentPage.Visual) { if (_textView != null) { _textView.OnPageConnected(); } if (_pageVisual != null) { RemoveVisualChild(_pageVisual); } _pageVisual = (PageVisual)_formatter.DocumentPage.Visual; AddVisualChild(_pageVisual); } // Set appropriate content offset if (_scrollData != null) { _pageVisual.Offset = new Vector(-_scrollData.HorizontalOffset, -_scrollData.VerticalOffset); } // DocumentPage.Visual is always returned in LeftToRight FlowDirection. // Hence, if the the current FlowDirection is RightToLeft, // mirroring transform need to be applied to the content. PtsHelper.UpdateMirroringTransform(FlowDirection, FlowDirection.LeftToRight, _pageVisual, safeArrangeSize.Width); } else { if (_pageVisual != null) { if (_textView != null) { _textView.OnPageDisconnected(); } RemoveVisualChild(_pageVisual); _pageVisual = null; } // Arrange bottomless content. if (_scrollData != null) { if (!DoubleUtil.AreClose(_scrollData.Viewport, safeArrangeSize)) { _scrollData.Viewport = safeArrangeSize; invalidateScrollInfo = true; } if (!DoubleUtil.AreClose(_scrollData.Extent, new Size())) { _scrollData.Extent = new Size(); invalidateScrollInfo = true; } if (!DoubleUtil.AreClose(_scrollData.Offset, new Vector())) { _scrollData.Offset = new Vector(); invalidateScrollInfo = true; } if (invalidateScrollInfo && _scrollData.ScrollOwner != null) { _scrollData.ScrollOwner.InvalidateScrollInfo(); } } } } return arrangeSize; } ////// Returns visual child at specified index. FlowDocumentView has just one child. /// protected override Visual GetVisualChild(int index) { if (index != 0) { throw new ArgumentOutOfRangeException("index", index, SR.Get(SRID.Visual_ArgumentOutOfRange)); } return _pageVisual; } #endregion Protected Methods //-------------------------------------------------------------------- // // Protected Properties // //-------------------------------------------------------------------- #region Protected Properties ////// Returns number of children. FlowDocumentView has just one child. /// protected override int VisualChildrenCount { get { return _pageVisual == null ? 0 : 1; } } #endregion Protected Properties //------------------------------------------------------------------- // // Internal Methods // //-------------------------------------------------------------------- #region Internal Methods ////// Suspends page layout. /// internal void SuspendLayout() { _suspendLayout = true; if (_pageVisual != null) { _pageVisual.Opacity = 0.5; } } ////// Resumes page layout. /// internal void ResumeLayout() { _suspendLayout = false; if (_pageVisual != null) { _pageVisual.Opacity = 1.0; } InvalidateMeasure(); } #endregion Internal Methods //------------------------------------------------------------------- // // Internal Properties // //------------------------------------------------------------------- #region Internal Properties ////// BreakRecordTable. /// internal FlowDocument Document { get { return _document; } set { if (_formatter != null) { HandleFormatterSuspended(_formatter, EventArgs.Empty); } _suspendLayout = false; _textView = null; _document = value; InvalidateMeasure(); InvalidateVisual(); //ensure re-rendering } } ////// DocumentPage. /// internal FlowDocumentPage DocumentPage { get { if (_document != null) { EnsureFormatter(); return _formatter.DocumentPage; } return null; } } #endregion Internal Properties //------------------------------------------------------------------- // // Private Methods // //-------------------------------------------------------------------- #region Private Methods ////// Ensures valid instance of FlowDocumentFormatter. /// private void EnsureFormatter() { Invariant.Assert(_document != null); if (_formatter == null) { _formatter = _document.BottomlessFormatter; _formatter.ContentInvalidated += new EventHandler(HandleContentInvalidated); _formatter.Suspended += new EventHandler(HandleFormatterSuspended); } Invariant.Assert(_formatter == _document.BottomlessFormatter); } ////// Responds to content invalidation. /// private void HandleContentInvalidated(object sender, EventArgs e) { Invariant.Assert(sender == _formatter); InvalidateMeasure(); InvalidateVisual(); //ensure re-rendering } ////// Responds to formatter suspention. /// private void HandleFormatterSuspended(object sender, EventArgs e) { Invariant.Assert(sender == _formatter); // Disconnect formatter. _formatter.ContentInvalidated -= new EventHandler(HandleContentInvalidated); _formatter.Suspended -= new EventHandler(HandleFormatterSuspended); _formatter = null; // Disconnect any content associated with the formatter. if (_pageVisual != null && !_suspendLayout) { if (_textView != null) { _textView.OnPageDisconnected(); } RemoveVisualChild(_pageVisual); _pageVisual = null; } } #endregion Private Methods //------------------------------------------------------------------- // // Private Fields // //-------------------------------------------------------------------- #region Private Fields private FlowDocument _document; // Hosted FlowDocument private PageVisual _pageVisual; // Visual representing the content private FlowDocumentFormatter _formatter; // Bottomless formatter associated with FlowDocument private ScrollData _scrollData; // IScrollInfo related data, if hosted by ScrollViewer private DocumentPageTextView _textView; // TextView associated with this element. private bool _suspendLayout; // Layout of the page is suspended. #endregion Private Fields //-------------------------------------------------------------------- // // IScrollInfo Members // //------------------------------------------------------------------- #region IScrollInfo Members ////// void IScrollInfo.LineUp() { if (_scrollData != null) { _scrollData.LineUp(this); } } ////// /// void IScrollInfo.LineDown() { if (_scrollData != null) { _scrollData.LineDown(this); } } ////// /// void IScrollInfo.LineLeft() { if (_scrollData != null) { _scrollData.LineLeft(this); } } ////// /// void IScrollInfo.LineRight() { if (_scrollData != null) { _scrollData.LineRight(this); } } ////// /// void IScrollInfo.PageUp() { if (_scrollData != null) { _scrollData.PageUp(this); } } ////// /// void IScrollInfo.PageDown() { if (_scrollData != null) { _scrollData.PageDown(this); } } ////// /// void IScrollInfo.PageLeft() { if (_scrollData != null) { _scrollData.PageLeft(this); } } ////// /// void IScrollInfo.PageRight() { if (_scrollData != null) { _scrollData.PageRight(this); } } ////// /// void IScrollInfo.MouseWheelUp() { if (_scrollData != null) { _scrollData.MouseWheelUp(this); } } ////// /// void IScrollInfo.MouseWheelDown() { if (_scrollData != null) { _scrollData.MouseWheelDown(this); } } ////// /// void IScrollInfo.MouseWheelLeft() { if (_scrollData != null) { _scrollData.MouseWheelLeft(this); } } ////// /// void IScrollInfo.MouseWheelRight() { if (_scrollData != null) { _scrollData.MouseWheelRight(this); } } ////// /// void IScrollInfo.SetHorizontalOffset(double offset) { if (_scrollData != null) { _scrollData.SetHorizontalOffset(this, offset); } } ////// /// void IScrollInfo.SetVerticalOffset(double offset) { if (_scrollData != null) { _scrollData.SetVerticalOffset(this, offset); } } ////// /// Rect IScrollInfo.MakeVisible(Visual visual, Rect rectangle) { if (_scrollData == null) { rectangle = Rect.Empty; } else { rectangle = _scrollData.MakeVisible(this, visual, rectangle); } return rectangle; } ////// /// bool IScrollInfo.CanVerticallyScroll { get { return (_scrollData != null) ? _scrollData.CanVerticallyScroll : false; } set { if (_scrollData != null) { _scrollData.CanVerticallyScroll = value; } } } ////// /// bool IScrollInfo.CanHorizontallyScroll { get { return (_scrollData != null) ? _scrollData.CanHorizontallyScroll : false; } set { if (_scrollData != null) { _scrollData.CanHorizontallyScroll = value; } } } ////// /// double IScrollInfo.ExtentWidth { get { return (_scrollData != null) ? _scrollData.ExtentWidth : 0; } } ////// /// double IScrollInfo.ExtentHeight { get { return (_scrollData != null) ? _scrollData.ExtentHeight : 0; } } ////// /// double IScrollInfo.ViewportWidth { get { return (_scrollData != null) ? _scrollData.ViewportWidth : 0; } } ////// /// double IScrollInfo.ViewportHeight { get { return (_scrollData != null) ? _scrollData.ViewportHeight : 0; } } ////// /// double IScrollInfo.HorizontalOffset { get { return (_scrollData != null) ? _scrollData.HorizontalOffset : 0; } } ////// /// double IScrollInfo.VerticalOffset { get { return (_scrollData != null) ? _scrollData.VerticalOffset : 0; } } ////// /// ScrollViewer IScrollInfo.ScrollOwner { get { return (_scrollData != null) ? _scrollData.ScrollOwner : null; } set { if (_scrollData == null) { // Create cached scroll info. _scrollData = new ScrollData(); } _scrollData.SetScrollOwner(this, value); } } #endregion IScrollInfo Members //-------------------------------------------------------------------- // // IServiceProvider Members // //------------------------------------------------------------------- #region IServiceProvider Members ////// /// Gets the service object of the specified type. /// /// /// An object that specifies the type of service object to get. /// ////// A service object of type serviceType. A null reference if there is no /// service object of type serviceType. /// object IServiceProvider.GetService(Type serviceType) { object service = null; if (serviceType == typeof(ITextView)) { if (_textView == null && _document != null) { _textView = new DocumentPageTextView(this, _document.StructuralCache.TextContainer); } service = _textView; } else if (serviceType == typeof(ITextContainer)) { if (Document != null) { service = Document.StructuralCache.TextContainer as TextContainer; } } return service; } #endregion IServiceProvider Members } } // File provided for Reference Use Only by Microsoft Corporation (c) 2007. // Copyright (c) Microsoft Corporation. All rights reserved.
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