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

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  • 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
                            0
                            • ManiRonM ManiRon

                              @Pradeep-P-N

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

                              Pradeep P NP Offline
                              Pradeep P NP Offline
                              Pradeep P N
                              wrote on last edited by Pradeep P N
                              #33

                              @ManiRon

                              Use qDebug() << ui->pushButton->isEnabled();

                              You cannot do ui->pushButton->enabled()

                              • Refer enabled.

                              Access functions:

                              • bool isEnabled() const
                              • void setEnabled(bool)

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

                              ManiRonM 1 Reply Last reply
                              5
                              • Pradeep P NP Pradeep P N

                                @ManiRon

                                Use qDebug() << ui->pushButton->isEnabled();

                                You cannot do ui->pushButton->enabled()

                                • Refer enabled.

                                Access functions:

                                • bool isEnabled() const
                                • void setEnabled(bool)
                                ManiRonM Offline
                                ManiRonM Offline
                                ManiRon
                                wrote on last edited by
                                #34

                                @Pradeep-P-N

                                After the button gets enabled the signal automatically called based on my previous click

                                and the print came as

                                Inside Pushbutton
                                ui->Pushbutton->isEnabled() 1
                                Inside Pushbutton
                                ui->Pushbutton->isEnabled() 1
                                Inside Pushbutton
                                ui->Pushbutton->isEnabled() 1

                                Pradeep P NP 1 Reply Last reply
                                0
                                • ManiRonM ManiRon

                                  @Pradeep-P-N

                                  After the button gets enabled the signal automatically called based on my previous click

                                  and the print came as

                                  Inside Pushbutton
                                  ui->Pushbutton->isEnabled() 1
                                  Inside Pushbutton
                                  ui->Pushbutton->isEnabled() 1
                                  Inside Pushbutton
                                  ui->Pushbutton->isEnabled() 1

                                  Pradeep P NP Offline
                                  Pradeep P NP Offline
                                  Pradeep P N
                                  wrote on last edited by Pradeep P N
                                  #35

                                  @ManiRon You dint debug the code after you disabled right ?

                                  • From your log i can clearly see that your PushButton was never disabled.
                                      ui->pushButton->setEnabled(false);
                                  
                                      qDebug() << ui->pushButton->isEnabled();
                                  

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

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

                                    @ManiRon You dint debug the code after you disabled right ?

                                    • From your log i can clearly see that your PushButton was never disabled.
                                        ui->pushButton->setEnabled(false);
                                    
                                        qDebug() << ui->pushButton->isEnabled();
                                    
                                    ManiRonM Offline
                                    ManiRonM Offline
                                    ManiRon
                                    wrote on last edited by
                                    #36

                                    @Pradeep-P-N

                                    Print was done before disabling
                                    Now done after disable
                                    Inside Pushbutton
                                    ui->Pushbutton->isEnabled() 0
                                    Inside Pushbutton
                                    ui->Pushbutton->isEnabled() 0

                                    Pradeep P NP 1 Reply Last reply
                                    0
                                    • ManiRonM ManiRon

                                      @Pradeep-P-N

                                      Print was done before disabling
                                      Now done after disable
                                      Inside Pushbutton
                                      ui->Pushbutton->isEnabled() 0
                                      Inside Pushbutton
                                      ui->Pushbutton->isEnabled() 0

                                      Pradeep P NP Offline
                                      Pradeep P NP Offline
                                      Pradeep P N
                                      wrote on last edited by Pradeep P N
                                      #37

                                      Hi @ManiRon

                                      • Please don't hurry, and just don't copy paste the code from the posts.
                                      • Adding proper debug() messages will help us to understand the code flow and resolve the issue. @jsulm @J-Hilk (Correct me if wrong)
                                      • Here the thing is to debug the flow and code.
                                      • We should check the flow of the code with respect to issue.
                                        • Button is disabled.
                                        • Button clicked.
                                        • Button gets set to enabled after few seconds.
                                        • clicked signal is emitted without button interaction.

                                      All the best.

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

                                      ManiRonM 1 Reply Last reply
                                      2
                                      • Pradeep P NP Pradeep P N

                                        Hi @ManiRon

                                        • Please don't hurry, and just don't copy paste the code from the posts.
                                        • Adding proper debug() messages will help us to understand the code flow and resolve the issue. @jsulm @J-Hilk (Correct me if wrong)
                                        • Here the thing is to debug the flow and code.
                                        • We should check the flow of the code with respect to issue.
                                          • Button is disabled.
                                          • Button clicked.
                                          • Button gets set to enabled after few seconds.
                                          • clicked signal is emitted without button interaction.

                                        All the best.

                                        ManiRonM Offline
                                        ManiRonM Offline
                                        ManiRon
                                        wrote on last edited by
                                        #38

                                        @Pradeep-P-N ya this is the sequence

                                        Pradeep P NP 1 Reply Last reply
                                        0
                                        • ManiRonM ManiRon

                                          @Pradeep-P-N ya this is the sequence

                                          Pradeep P NP Offline
                                          Pradeep P NP Offline
                                          Pradeep P N
                                          wrote on last edited by
                                          #39

                                          @ManiRon
                                          Ok, Please add some debug messages for the flow in your code so we can get it clearly.

                                          Just Adding qDebug() << ui->Pushbutton->isEnabled() ; will not provide us the details of the flow to resolve the error.

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

                                          1 Reply Last reply
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