Question

I have the following code (implemented in the mouseReleaseEvent) to detect when the user has selected lines of text:

    QTextCursor cursor = this->textCursor();
    int start = cursor.selectionStart();
    int end = cursor.selectionEnd();

    if(!cursor.hasSelection())
        return; // No selection available

    qWarning() << "start: " << start << " end: " << end << endl;

the problem is: I need the line numbers where the selection begins and ends. I’ve been struggling with blocks and solved nothing, can you please give me a clue?

Answer 1

It is possible, that it isn’t the best solution, but it seems to work for me. The variable selectedLines will contain, how many lines are selected.

QTextCursor cursor = ui->plainTextEdit->textCursor();
int selectedLines = 0; //<--- this is it 
if(!cursor.selection().isEmpty())
{
    QString str = cursor.selection().toPlainText();
    selectedLines = str.count("\n")+1;
}

I hope, that it will be helpful 🙂