Rich Text Editor for WinForms: Document Layout API - Practical Usage

This example demonstrates how to use RichEditControl's layout API to collect information about a currently clicked document element (and its parent elements).

Implementation Details

This example shows the following approaches to get layout information about a current element:

• Use the DocumentLayout.GetElement method overloads;
• Use the LayoutIterator class;
• Use a custom LayoutVisitor descendant.

To get layout information about the current element, set the caret inside a text block or table cell (or select an image) and click the Analyze current document layout button.

Depending on the type (text block, image, table cell, textbox, etc.) of a clicked element, you can retrieve the following information:

• Content
• Content bounds
• Position on a page
• Page bounds
• Current page index
• Number of images/text boxes on a page
• Common text blocks count, etc.

Files to Review

C#	Visual Basic
CustomDocumentLayoutVisitor.cs	CustomDocumentLayoutVisitor.vb
DocumentElementLayoutHelper.cs	DocumentElementLayoutHelper.vb
PageLayoutHelper.cs	PageLayoutHelper.vb
RichEditDocumentLayoutAnalyzer.cs	RichEditDocumentLayoutAnalyzer.vb
TextBoxLayoutHelper.cs	TextBoxLayoutHelper.vb
Form1.cs	Form1.vb

Documentation

• Layout API

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