Qt simple note pad, print line number on status bar of QmainWindow

Question

I have created simple notepad from Qt/C++. I want to print the line number on status bar of QMainWindow when I click somewhere on the text area, like notepad of Microsoft Windows

Answer 1

You can connect the cursorPositionChanged() signal of your text area to a custom slot of your QMainWindow:

// the connection
connect(ui->plainTextEdit, SIGNAL(cursorPositionChanged()), this, SLOT(showCursorPos()));
// your custom slot
void MainWindow::showCursorPos()
{
    int line = ui->plainTextEdit->textCursor().blockNumber()+1;
    int pos = ui->plainTextEdit->textCursor().columnNumber()+1;
    ui->statusBar->showMessage(QString("Ln %1, Col %2").arg(line).arg(pos));
}

Answer 2

use this codeui->textEdit->document()->lineCount();

Answer 3

I'm guessing you're using QTextEdit as the "editor" widget.

To get where is the cursor in your QTextEdit, you should use

row = myTextEdit->textCursor()->blockNumber();

and for the column

column = myTextEdit->textCursor()->positionInBlock();

Then just edit your status bar text with these infos