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C# FlowDocument.ClearValue方法代码示例

本文整理汇总了C#中System.Windows.Documents.FlowDocument.ClearValue方法的典型用法代码示例。如果您正苦于以下问题:C# FlowDocument.ClearValue方法的具体用法?C# FlowDocument.ClearValue怎么用?C# FlowDocument.ClearValue使用的例子?那么恭喜您, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在System.Windows.Documents.FlowDocument的用法示例。


在下文中一共展示了FlowDocument.ClearValue方法的1个代码示例,这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞,您的评价将有助于系统推荐出更棒的C#代码示例。

示例1: DocumentChanged

        /// <summary>
        /// The Document has changed and needs to be updated.
        /// </summary>
        private void DocumentChanged(FlowDocument oldDocument, FlowDocument newDocument)
        {
            // Use TextSelection to determine whether the new document belongs to another
            // control or not.
            if (newDocument != null &&
                newDocument.StructuralCache.TextContainer != null &&
                newDocument.StructuralCache.TextContainer.TextSelection != null)
            {
                throw new ArgumentException(SR.Get(SRID.FlowDocumentScrollViewerDocumentBelongsToAnotherFlowDocumentScrollViewerAlready));
            }

            // Cleanup state associated with the old document.
            if (oldDocument != null)
            {
                // If Document was added to logical tree of FlowDocumentScrollViewer before, remove it.
                if (_documentAsLogicalChild)
                {
                    RemoveLogicalChild(oldDocument);
                }
                // Remove the document from the ContentHost.
                if (RenderScope != null)
                {
                    RenderScope.Document = null;
                }

                oldDocument.ClearValue(PathNode.HiddenParentProperty);
                oldDocument.StructuralCache.ClearUpdateInfo(true);
            }

            // If FlowDocumentScrollViewer was created through style, then do not modify
            // the logical tree. Instead, set "core parent" for the Document.
            if (newDocument != null && LogicalTreeHelper.GetParent(newDocument) != null)
            {
                // Set the "core parent" back to us.
                ContentOperations.SetParent(newDocument, this);
                _documentAsLogicalChild = false;
            }
            else
            {
                _documentAsLogicalChild = true;
            }

            // Initialize state associated with the new document.
            if (newDocument != null)
            {
                // Set the document on the ContentHost.
                if (RenderScope != null)
                {
                    RenderScope.Document = newDocument;
                }
                // If Document should be part of FlowDocumentScrollViewer's logical tree, add it.
                if (_documentAsLogicalChild)
                {
                    AddLogicalChild(newDocument);
                }

                // Set the hidden parent of the document
                newDocument.SetValue(PathNode.HiddenParentProperty, this);
                newDocument.StructuralCache.ClearUpdateInfo(true);
            }

            // Attach TextEditor, if content supports it. This method will also
            // detach TextEditor from old content.
            AttachTextEditor();

            // Update the toolbar with our current document state.
            if (!CanShowFindToolBar)
            {
                // Disable FindToolBar, if the content does not support it.
                if (FindToolBar != null)
                {
                    ToggleFindToolBar(false);
                }
            }

            // Document is also represented as Automation child. Need to invalidate peer to force update.
            FlowDocumentScrollViewerAutomationPeer peer = UIElementAutomationPeer.FromElement(this) as FlowDocumentScrollViewerAutomationPeer;
            if (peer != null)
            {
                peer.InvalidatePeer();
            }
        }
开发者ID:nlh774,项目名称:DotNetReferenceSource,代码行数:85,代码来源:FlowDocumentScrollViewer.cs


注:本文中的System.Windows.Documents.FlowDocument.ClearValue方法示例由纯净天空整理自Github/MSDocs等开源代码及文档管理平台,相关代码片段筛选自各路编程大神贡献的开源项目,源码版权归原作者所有,传播和使用请参考对应项目的License;未经允许,请勿转载。