Qtimer and Qlabel

najlou

hello i would like to display the message of ui->label camera msg only for 5s i used QTimer::singleShot but it does not work could you help me please

QTimer::singleShot(5000, this ,ui->label_camera_msg );

JonB

@najlou said in Qtimer and Qlabel:

i used QTimer::singleShot but it does not work

Well the singleshot timer works.

QTimer::singleShot(5000, this ,ui->label_camera_msg );

Doesn't the compiler give an error message for this? ui->label_camera_msg is not a functor, it's (presumably) a QLabel variable....

What about:

ui->label_camera_msg.setText("Something");
QTimer::singleShot(5000, this, [this]() { ui->label_camera_msg.setText(""); } );

?

J.Hilk

@JonB no need for a lambda here

QTimer::singleShot(5000, ui->label_camera_msg, &QLabel::clear );

JonB

@J-Hilk said in Qtimer and Qlabel:

QLabel::clear

Damn, never noticed that one! :) Thanks.

najlou

@J-Hilk @JonB
thank you for your answer but now it only shows me the second message
I would like the first one for 5s and after he shows me the second

ui->label_camera_msg->setText("Capture Caméra Avant");
QTimer::singleShot(5000, ui->label_camera_msg, &QLabel::clear );
ui->label_camera_msg->setText("Faut faire l'initialisation, Pour le vidéo");

JonB

@najlou
So you will need to use my lambda after all :) Adjust it to do what you want when the timer expires....

J.Hilk

@najlou you're changing the goal post here, but fine, back to lambda we go:

ui->label_camera_msg->setText("Capture Caméra Avant");
QTimer::singleShot(5000, this, [this]() { ui->label_camera_msg.setText("Faut faire l'initialisation, Pour le vidéo"); } );

najlou

@J-Hilk @JonB thanks you :)