Button enable signal does not work.

[Kycho]

Hi, I don't know what went wrong.

1. I set the default of the button to false.

findButton->setEnabled(false);

2. I connected as below.

connect(lineEdit, SIGNAL(textChanged(const QString &)),
this, SLOT(enableFindButton(const Qstring &)));

3.I defined enableFindButton like this.

void FindDialog::enableFindButton(const QString &text){
    findButton->setEnabled(!text.isEmpty());
}

But, It is not work.

What did I do wrong?

Thanks.

[Christian Ehrlicher]

@Kycho said in Button enable signal does not work.:

connect(lineEdit, SIGNAL(textChanged(const QString &)),
this, SLOT(enableFindButton(const Qstring &)));

There is a typo (Qstring). You will also get a warning at runtime about this error.
To avoid this completely I suggest to use the new signal/slot syntax:

connect(lineEdit, &QLineEdit::textChanged, this, &FindDialog::enableFindButton);

[Kycho]

@Christian-Ehrlicher Thank you.
I've fixed the issue.