Connecting from a dialog to mainWindow

[anda_skoa]

Is there any advantage behind forwarding the signal to another signal

connect(ui->lineEdit, SIGNAL(textChanged(QString)), this, SIGNAL(textChanged(QString)));

connect(ui->lineEdit, SIGNAL(textChanged(QString)), this, SIGNAL(textChanged(QString)));

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over just emitting a new signal such as ?

emit sendText(ui->lineEdit->text());

emit sendText(ui->lineEdit->text());

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It depends on what the goal is.

Given the thread starter's question it looks like the goal is a synchronisation between two line edits.
For that goal the forwarding is "nicer" because you don't need a slot just to emit a signal again and the signal/signal connect makes the forwarding very obvious when reading the code.

In the example you gave, i.e. reacting to a button, the slot plus explicit emit is the only possible choice.

Cheers,
_