QObject::connect does not execute a function in SLOT when it is declared as a lambda

[TrofikdofiK]

I have a function with the following code

void MainWindow::openSettingWindow() noexcept
{
	QWidget* settingWidget = new QWidget();
	settingWidget->setAttribute(Qt::WA_DeleteOnClose);
	settingWidget->setFixedSize(200, 190);
	settingWidget->setStyleSheet("QWidget {background-color: red;}");

	QLabel* upLabel = new QLabel("Вверх", settingWidget);
	setStyleLabelSetting(*upLabel, 20);

	QPushButton* keyUp = new QPushButton("W", settingWidget);
	setStyleKeyLabelSetting(*keyUp, 20);

	QObject::connect(keyUp, SIGNAL(clicked()), SLOT([keyUp]()
		{
			keyUp->setText("");
		}
	));

	settingWidget->show();
}

When I run it lambda is not executed. If I set a breakpoint, it says that the code is not running.

How to fix this?

[Christian Ehrlicher]

@TrofikdofiK said in QObject::connect does not execute a function in SLOT when it is declared as a lambda:

How to fix this?

Fix your QObject::connect() by using the new signal/slot syntax. Lambdas can't work with the old-style connect.

[TrofikdofiK]

@Christian-Ehrlicher thanks