How to find paragraph under mouse

[John]

Is there a way to determine which paragraph in a document the mouse is over when the user right-clicks?

[Petya]

Hi John,

When right-clicking within a RadRichTextBox, the caret position is changed to the place where you clicked. So, you can obtain the paragraph using the CaretPosition. For example, here is how you can select it:

DocumentPosition start = new DocumentPosition(editor.Document);
DocumentPosition end = new DocumentPosition(editor.Document);

start.MoveToPosition(editor.Document.CaretPosition);
end.MoveToPosition(editor.Document.CaretPosition);

start.MoveToFirstPositionInParagraph();
end.MoveToLastPositionInParagraph();

editor.Document.Selection.AddSelectionStart(start);
editor.Document.Selection.AddSelectionEnd(end);

You can refer to the Positioning and Selection articles in our documentation for further information.

I hope this is helpful! If you have other questions, please do not hesitate to get back to us.
 
All the best,
Petya
the Telerik team