如何在QTextEdit光标中找到所选内容的开始和结束行号？

Question

I have a QTextEdit widget which is showing lines of text. I want the user to be able to select a block of text to be acted on. I need to determine the starting and ending line numbers from the complete text that correspond to the selected block.

editor.textCursor().blockNumber() gives me the correct starting line number but I haven't been able to find the line number of the ending postion.

Finding the length of the selection in lines would be fine.

I'm using PySide and Python 2.7

Answer 1

Use QTextCursor::selectionStart and QTextCursor::selectionEnd to get block start and end position (as an int ).

Then get copy of the text cursor, use QTextCursor::setPosition to set position to these two, and use QTextCursor::blockNumber to get the line numbers.

There may be a shorter way, considering how QTextCursor has quite a lot of methods, but this should work. You may want to write a helper method, for example one which takes the position and a QTextDocument or QTextCursor , and returns the line number for that position.