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

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  • ManiRonM ManiRon

    @jsulm

      ui->pushbutton->setdisabled(true);
    

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

    jsulmJ Offline
    jsulmJ Offline
    jsulm
    Lifetime Qt Champion
    wrote on last edited by
    #6

    @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.

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

    ManiRonM 1 Reply Last reply
    2
    • jsulmJ 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.

      ManiRonM Offline
      ManiRonM Offline
      ManiRon
      wrote on last edited by ManiRon
      #7

      @jsulm

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

      This is my exact code when i click the button

      jsulmJ 1 Reply Last reply
      0
      • ManiRonM ManiRon

        @jsulm

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

        This is my exact code when i click the button

        jsulmJ Offline
        jsulmJ Offline
        jsulm
        Lifetime Qt Champion
        wrote on last edited by jsulm
        #8

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

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

        ManiRonM 1 Reply Last reply
        0
        • jsulmJ jsulm

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

          ManiRonM Offline
          ManiRonM Offline
          ManiRon
          wrote on last edited by
          #9

          @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

          jsulmJ 1 Reply Last reply
          0
          • ManiRonM 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

            jsulmJ Offline
            jsulmJ Offline
            jsulm
            Lifetime Qt Champion
            wrote on last edited by
            #10

            @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?

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

            ManiRonM 1 Reply Last reply
            1
            • jsulmJ 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?

              ManiRonM Offline
              ManiRonM Offline
              ManiRon
              wrote on last edited by
              #11

              @jsulm Yes clicked signal

              1 Reply Last reply
              0
              • ManiRonM ManiRon

                I want to disable the click event for a QPushbutton when it is disabled, whether it can be done ?

                J.HilkJ Online
                J.HilkJ Online
                J.Hilk
                Moderators
                wrote on last edited by
                #12

                @ManiRon
                can you create a minimal example?

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


                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.

                jsulmJ 1 Reply Last reply
                0
                • 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

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