QPushButton in a QFrame does not receive clicked signle.

[ryman]

I have a QPushButton in a QFrame, and add code below in the mainwindow constructor.
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connect(ui->btn_close, &QPushButton::clicked, this, [=]{
    qDebug(" button is clicked");
});

But when I clicked button, no clicked single was received. What's the problem? Thanks!

[tannhaus]

I might not be helpful....but aren't you missing the () in your lambda?

connect(ui->btn_close, &QPushButton::clicked, this, [=](){
    qDebug(" button is clicked");
});

[ryman]

@tannhaus
I added this keyword , the problem is not resovled.

[tannhaus]

@ryman

The following code works:

connect(ui->btn_close, &QPushButton::clicked, this, [=](){qDebug() << "Button is clicked";});

[JonB]

@ryman said in QPushButton in a QFrame does not receive clicked signle.:

@tannhaus
I added this keyword , the problem is not resovled.

It's not this which is at issue. As @tannhaus has shown you, it is parentheses you are missing, please copy & paste his code.

[qwasder85]

@JonB said in QPushButton in a QFrame does not receive clicked signle.:

@ryman said in QPushButton in a QFrame does not receive clicked signle.:

@tannhaus

I added this keyword , the problem is not resovled.

It's not this which is at issue. As @tannhaus has shown you, it is parentheses you are missing, please copy & paste his code.

You might even have to put the bool-parameter (from the clicked-signal) into the parentheses.

connect(ui->btn_close, &QPushButton::clicked, this, [=](bool){
    qDebug(" button is clicked");
});

[JonB]

@qwasder85
It is good style to do that anyway, but I thought (untested!) that when you have a lambda you can choose to omit parameters if you don't want them....

[Ketan__Patel__0011]

@qwasder85

try this:

add this Code in Header File:

private slots:
        void Click_Event_Of_CloseButton();

add this Code in Source File

connect(ui->btn_close, SIGNAL(clicked()), this, SLOT(Click_Event_Of_CloseButton()));

and write your code in Click_Event_Of_CloseButton function

[Christian Ehrlicher]

@ryman said in QPushButton in a QFrame does not receive clicked signle.:

But when I clicked button, no clicked single was received. What's the problem? Thanks!

Please provide a minimal, compilable example. I don't see why it should not work.

[MarKS]

@Ketan__Patel__0011 OP states btn_close does not emit the clicked signal at all.