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

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  • J.HilkJ J.Hilk

    @ManiRon
    can you create a minimal example?

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

    jsulmJ Offline
    jsulmJ Offline
    jsulm
    Lifetime Qt Champion
    wrote on last edited by
    #13

    @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?

    https://forum.qt.io/topic/113070/qt-code-of-conduct

    ManiRonM 2 Replies Last reply
    0
    • Pradeep P NP Offline
      Pradeep P NP Offline
      Pradeep P N
      wrote on last edited by Pradeep P N
      #14

      @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);
      }
      

      0_1561526021909_Btn.gif

      Pradeep Nimbalkar.
      Upvote the answer(s) that helped you to solve the issue...
      Keep code clean.

      1 Reply Last reply
      3
      • jsulmJ 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?

        ManiRonM Offline
        ManiRonM Offline
        ManiRon
        wrote on last edited by
        #15

        @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

        1 Reply Last reply
        0
        • jsulmJ 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?

          ManiRonM Offline
          ManiRonM Offline
          ManiRon
          wrote on last edited by
          #16

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

          Pradeep P NP 1 Reply Last reply
          0
          • ManiRonM ManiRon

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

            Pradeep P NP Offline
            Pradeep P NP Offline
            Pradeep P N
            wrote on last edited by Pradeep P N
            #17

            @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);
            }
            

            0_1561526880214_Btn.gif

            Pradeep Nimbalkar.
            Upvote the answer(s) that helped you to solve the issue...
            Keep code clean.

            ManiRonM 1 Reply Last reply
            3
            • Pradeep P NP Offline
              Pradeep P NP Offline
              Pradeep P N
              wrote on last edited by Pradeep P N
              #18

              Hi @ManiRon

              Try this with your setStyleSheet()

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

              0_1561527474438_Btn.gif
              All the best.

              Pradeep Nimbalkar.
              Upvote the answer(s) that helped you to solve the issue...
              Keep code clean.

              1 Reply Last reply
              4
              • Pradeep P NP 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);
                }
                

                0_1561526880214_Btn.gif

                ManiRonM Offline
                ManiRonM Offline
                ManiRon
                wrote on last edited by ManiRon
                #19

                @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.HilkJ 1 Reply Last reply
                0
                • ManiRonM 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.HilkJ Online
                  J.HilkJ Online
                  J.Hilk
                  Moderators
                  wrote on last edited by
                  #20

                  @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!


                  Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                  Q: What's that?
                  A: It's blue light.
                  Q: What does it do?
                  A: It turns blue.

                  ManiRonM Pradeep P NP J.HilkJ 3 Replies Last reply
                  0
                  • J.HilkJ 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!

                    ManiRonM Offline
                    ManiRonM Offline
                    ManiRon
                    wrote on last edited by
                    #21

                    @J.Hilk how it can be solved ?

                    jsulmJ 1 Reply Last reply
                    0
                    • J.HilkJ 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!

                      Pradeep P NP Offline
                      Pradeep P NP Offline
                      Pradeep P N
                      wrote on last edited by Pradeep P N
                      #22

                      @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.

                      Pradeep Nimbalkar.
                      Upvote the answer(s) that helped you to solve the issue...
                      Keep code clean.

                      J.HilkJ 1 Reply Last reply
                      0
                      • Pradeep P NP 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.
                        J.HilkJ Online
                        J.HilkJ Online
                        J.Hilk
                        Moderators
                        wrote on last edited by
                        #23

                        @Pradeep-P-N

                        What I get out of @ManiRon statement is:

                        • Button is disabled
                        • Button gets pressed/clicked
                          • nothing happens, as expected
                        • Button gets set to enabled
                          • clicked signal is emitted without button interaction

                        Thats not normal behavior in my opinion

                        I'll make a quick test case

                        @ManiRon what Qt Version what OS btw?


                        Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                        Q: What's that?
                        A: It's blue light.
                        Q: What does it do?
                        A: It turns blue.

                        ManiRonM 1 Reply Last reply
                        1
                        • Pradeep P NP Offline
                          Pradeep P NP Offline
                          Pradeep P N
                          wrote on last edited by
                          #24

                          Hmmm, Got it @J-Hilk
                          Thanks.

                          @ManiRon Can you share a sample code ?
                          You said you are using the QTimer.
                          Just wanted to check if there is anything mismatch with the code.

                          Pradeep Nimbalkar.
                          Upvote the answer(s) that helped you to solve the issue...
                          Keep code clean.

                          1 Reply Last reply
                          0
                          • J.HilkJ 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!

                            J.HilkJ Online
                            J.HilkJ Online
                            J.Hilk
                            Moderators
                            wrote on last edited by
                            #25

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

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

                            Nope, not true 5.12.4 MacOS, no unexpected clicked emits

                            int main(int argc, char *argv[])
                            {
                            
                                QApplication a(argc, argv);
                            
                                auto *btn = new QPushButton("Enabled");
                                btn->resize(200, 50);
                                btn->show();
                            
                                QObject::connect(btn, &QPushButton::clicked, [btn]()->void{
                                                     btn->setEnabled(false);
                                                     btn->setText("Disabled");
                                                     qDebug("Btn clicked");
                                                 });
                                QObject::connect(btn, &QPushButton::pressed, []()->void{qDebug("Btn Pressed"); });
                                QObject::connect(btn, &QPushButton::released, []()->void{qDebug("Btn Released"); });
                            
                                QTimer t_reset;
                                t_reset.setInterval(3000);
                                QObject::connect(&t_reset, &QTimer::timeout, btn, [btn]()->void{btn->setEnabled(true); btn->setText("Enabled");});
                            
                                QObject::connect(btn, &QPushButton::clicked, &t_reset, QOverload<>::of(&QTimer::start));
                            
                                return  a.exec();
                            }
                            

                            Be aware of the Qt Code of Conduct, when posting : https://forum.qt.io/topic/113070/qt-code-of-conduct


                            Q: What's that?
                            A: It's blue light.
                            Q: What does it do?
                            A: It turns blue.

                            1 Reply Last reply
                            3
                            • Pradeep P NP Offline
                              Pradeep P NP Offline
                              Pradeep P N
                              wrote on last edited by Pradeep P N
                              #26

                              @J-Hilk
                              Even i tried on 5.12.3 - Ubuntu 16.04 & the above code ( From my post ).
                              Also the one shared by you.
                              It works fine.

                              • No Click called related to button enable/disable status.

                              Pradeep Nimbalkar.
                              Upvote the answer(s) that helped you to solve the issue...
                              Keep code clean.

                              1 Reply Last reply
                              3
                              • ManiRonM ManiRon

                                @J.Hilk how it can be solved ?

                                jsulmJ Offline
                                jsulmJ Offline
                                jsulm
                                Lifetime Qt Champion
                                wrote on last edited by
                                #27

                                @ManiRon Please add

                                qDebug() << ui->pushButton->enabled();
                                

                                to your slot and see what it outputs when you click on the button while it is disabled.
                                And please debug you app more carefully: you say you have a timeout to activate the button again (you should have said that in your first post already)? Did you make sure the button was not yet activated? Is it the same if you disable you style sheet?

                                https://forum.qt.io/topic/113070/qt-code-of-conduct

                                ManiRonM 1 Reply Last reply
                                1
                                • J.HilkJ J.Hilk

                                  @Pradeep-P-N

                                  What I get out of @ManiRon statement is:

                                  • Button is disabled
                                  • Button gets pressed/clicked
                                    • nothing happens, as expected
                                  • Button gets set to enabled
                                    • clicked signal is emitted without button interaction

                                  Thats not normal behavior in my opinion

                                  I'll make a quick test case

                                  @ManiRon what Qt Version what OS btw?

                                  ManiRonM Offline
                                  ManiRonM Offline
                                  ManiRon
                                  wrote on last edited by ManiRon
                                  #28

                                  @J.Hilk QT 5.5.0 QT Creator version 3.4.2 OS Windows Vista

                                  1 Reply Last reply
                                  0
                                  • jsulmJ jsulm

                                    @ManiRon Please add

                                    qDebug() << ui->pushButton->enabled();
                                    

                                    to your slot and see what it outputs when you click on the button while it is disabled.
                                    And please debug you app more carefully: you say you have a timeout to activate the button again (you should have said that in your first post already)? Did you make sure the button was not yet activated? Is it the same if you disable you style sheet?

                                    ManiRonM Offline
                                    ManiRonM Offline
                                    ManiRon
                                    wrote on last edited by
                                    #29

                                    @jsulm Yes i made sure cause i enable the button after 3s only , and this statement is not there , it throws error (qDebug() << ui->pushButton->enabled())

                                    Pradeep P NP 1 Reply Last reply
                                    0
                                    • ManiRonM ManiRon

                                      @jsulm Yes i made sure cause i enable the button after 3s only , and this statement is not there , it throws error (qDebug() << ui->pushButton->enabled())

                                      Pradeep P NP Offline
                                      Pradeep P NP Offline
                                      Pradeep P N
                                      wrote on last edited by Pradeep P N
                                      #30

                                      @ManiRon
                                      Did you add #include <QDebug>

                                      Ad if so -> What is the error ?

                                      Pradeep Nimbalkar.
                                      Upvote the answer(s) that helped you to solve the issue...
                                      Keep code clean.

                                      ManiRonM 2 Replies Last reply
                                      3
                                      • Pradeep P NP Pradeep P N

                                        @ManiRon
                                        Did you add #include <QDebug>

                                        Ad if so -> What is the error ?

                                        ManiRonM Offline
                                        ManiRonM Offline
                                        ManiRon
                                        wrote on last edited by
                                        #31

                                        @Pradeep-P-N yes

                                        1 Reply Last reply
                                        0
                                        • Pradeep P NP Pradeep P N

                                          @ManiRon
                                          Did you add #include <QDebug>

                                          Ad if so -> What is the error ?

                                          ManiRonM Offline
                                          ManiRonM Offline
                                          ManiRon
                                          wrote on last edited by
                                          #32

                                          @Pradeep-P-N

                                          class QPushButton' has no member named 'enabled'
                                          qDebug() << ui->pushbutton->enabled();
                                          ^

                                          Pradeep P NP 1 Reply Last reply
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