Assuming I have a line number in the variable ln.
int ln=25;
When I pass ln to QPlainTextEdit, the scrollbar will scroll to the line 25 in QPlainTextEdit.
How to implement this feature? Could anybody give me some advice? I would be very grateful
Use QPlaintextEdit::document to get the QTextDocument.
Use QTextDocument::findBlockByLineNumber to get QTextBlock of a specific line number. Remember though, it starts from line 0, not line 1.
Then create a QTextCursor using this QTextBlock and set it to your QPlainTextEdit.
int ln=25;
QTextCursor cursor(p_textEdit->document()->findBlockByLineNumber(ln-1)); // ln-1 because line number starts from 0
p_textEdit->setTextCursor(cursor);