How to prevent the mouse click event from happening when the button is Disabled

[ManiRon]

@jsulm even when the push button is disabled, when we click on the disabled QPushButton the click signal is generated and operations are performed again . which i want to stop .

[jsulm]

@ManiRon No, clicked() signal is not emitted if the button is disabled. This is the whole point of disabling a button. And I just tested it.
How did you disable the button?

[ManiRon]

@jsulm

  ui->pushbutton->setdisabled(true);

I disable the pushbutton once it is clicked , but the signal was still created

[jsulm]

@ManiRon Just did the same: disabled button after first click. Works as expected for me: after disabling clicked signal is not emitted. Is the button shown as greyed out after disabling? Are you sure you're disabling the correct button?
By the way: it is setDisabled not setdisabled.

[ManiRon]

@jsulm

 ui->label->clear();
ui->label->repaint();
  ui->pushbutton->setDisabled(true);
   TargetConnect();

This is my exact code when i click the button

[jsulm]

@ManiRon You mean this is the code in the slot connected to clicked() signal?
What about my other questions? Can you answer them?

[ManiRon]

@jsulm I am using a style sheet , so i am not able to see whether the button is greyed out , i create a change in color when it is pressed , the color remains the same till the button is enabled

[jsulm]

@ManiRon Are you sure you're disabling the correct button?
As I said: I can't reproduce such behaviour, there must be something in your code.
Also you can disable your style sheet and test again.
And to be sure: in the title you're talking about event, but you mean clicked() signal, correct?

[ManiRon]

@jsulm Yes clicked signal

[J.Hilk]

@ManiRon
can you create a minimal example?

In fact you should!
Or maybe @jsulm can share his for you ;)

[jsulm]

@J.Hilk @ManiRon It's as simple as

connect(ui->pushButton, &QPushButton::clicked, [this](bool){ qDebug() << "Clicked"; ui->pushButton->setDisabled(true);});

And I'm still interested in an answer to this question: Are you sure you're disabling the correct button?

[Pradeep P N]

@jsulm @J-Hilk

I think the problem here for @ManiRon is the style sheet for the QPushButton

The Button is actually disabled on Click, but due to the StyleSheet the color difference is not found.

void MainWindow::on_pushButton_clicked()
{
    qDebug() << Q_FUNC_INFO;
    ui->label->setText("Button is Disabled");
    ui->pushButton->setEnabled(false);
}

[ManiRon]

@jsulm Yes Actually i am disabling the button for 3sec only so it accepts the signal again after 3sec , which i came to know when i printed the time with seconds

[ManiRon]

@jsulm I think the problem here is the timeout that i have given , i think its less

[Pradeep P N]

@ManiRon
I just tried with Timer it works fine.
The Button is disabled for 3s.

• Check with your stylesheet.

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    ui->label->setVisible(false);

    tmr = new QTimer(this);
    connect(tmr, &QTimer::timeout, [this]{
        ui->pushButton->setEnabled(true);
    });
}

void MainWindow::on_pushButton_clicked()
{
    qDebug() << Q_FUNC_INFO << QTime::currentTime().toString();

    tmr->start();
    tmr->setInterval(3000);

    ui->pushButton->setEnabled(false);
}

[Pradeep P N]

Hi @ManiRon

Try this with your setStyleSheet()

ui->pushButton->setStyleSheet("QPushButton {"
                              "background-color:#44c767;"
                              "}"
                              "QPushButton:disabled {"
                              "background-color:gray;"
                              "}");

All the best.

[ManiRon]

@Pradeep-P-N @jsulm @J-Hilk
when i created a sample i was absorbing one thing , that when i click the button i disabled it , but while i click the button when it is disabled after enabling the button the click signal gets emitted and the click function is executed by the click signal which was occuring when i clicked the button when it was disabled

[J.Hilk]

@ManiRon said in How to prevent the mouse click event from happening when the button is Disabled:

but while i click the button when it is disabled after enabling the button the click signal gets emitted and the click function is executed

If true, then that's a bug in the library!

[ManiRon]

@J.Hilk how it can be solved ?

[Pradeep P N]

@J.Hilk
i am bit confused with the statement in fact.

"but while i click the button when it is disabled after enabling the button the click signal gets emitted and the click function is executed"

• i click the button when it is disabled -> Nothing will work as Button is Disabled.
• after enabling the button the click signal gets emitted -> Yes as after 3s timer the button is enabled and can be clicked.