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  4. Time delay in loading progress bar (GIF Format)

Time delay in loading progress bar (GIF Format)

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  • jsulmJ jsulm

    @sankarapandiyan There is a dirty workaround: calling https://doc.qt.io/qt-5/qcoreapplication.html#processEvents inside on_pushButton_4_clicked() as often as possible. But it is really this: dirty workaround.

    JonBJ Offline
    JonBJ Offline
    JonB
    wrote on last edited by JonB
    #9

    @jsulm
    I don't want to sully this discussion, but could you just give a quick "yes" or "no" to my

    But in any case, is it safe to use processEvents() inside a slot? Won't that potentially mess things up?

    e.g. can't user press button a second time while in slot for first time and cause havoc?

    jsulmJ 1 Reply Last reply
    1
    • JonBJ JonB

      @jsulm
      I don't want to sully this discussion, but could you just give a quick "yes" or "no" to my

      But in any case, is it safe to use processEvents() inside a slot? Won't that potentially mess things up?

      e.g. can't user press button a second time while in slot for first time and cause havoc?

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

      @JonB said in Time delay in loading progress bar (GIF Format):

      e.g. can't user press button a second time while in slot for first time and cause havoc?

      I guess he/she can :-)
      But same applies to using thread: you have to make sure you don't trigger the same action when it is already being executed. Not hard to implement (disconnect the slot or use a guard variable).

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

      1 Reply Last reply
      5
      • sankarapandiyanS Offline
        sankarapandiyanS Offline
        sankarapandiyan
        wrote on last edited by
        #11

        @jsulm @JonB I have used process event( ), And i get a output what i want .. But at last both the progress bar gif windows and task windows are closed automatically .Here i want to hide a progress bar gif window at last , but here both windows are closed . So how to fix this problem .

        this is my code

        void MainWindow::on_pushButton_4_clicked()
        {
            QMovie*movie=new QMovie(":/somegif.gif");
            qDebug() << "test1";
                if(!movie->isValid()){
                    //something went Wrong
                    return;
                }
                //play GIF
                auto label=new QLabel();
                label->resize(400,180);
                label->setMovie(movie);
                label->show();
                movie->start();
        
                QTimer*timer=new QTimer(this);
                connect(timer,SIGNAL(timeout()),this,SLOT(PrintDebugInTimer()));
                timer->start(1000);
                //start time to close it after 10 sec
                QTimer::singleShot(10000,[label,&timer]{
                   // label->close();
                    label->deleteLater();
                    timer->stop();
                });
        
            Mat image = imread("/home/pi/test.jpg");
            //Rect myROI(445, 745, 400, 400);
            //Mat crop = image(myROI);
            //imwrite("/home/pi/1.png", crop);
            Mat roi1 = image( Rect(2000,730,400,400));
            Mat roi2 = image( Rect(1220,720,400,400));
            Mat roi3 = image( Rect(445,745,400,400));
            imwrite("/home/pi/1.png", roi1);
            imwrite("/home/pi/2.png", roi2);
            imwrite("/home/pi/3.png", roi3);
        
            digitalWrite(7,LOW);
            digitalWrite(5,HIGH);
        
            for(int i=0;i<(35*50);i++)
            {
                QCoreApplication::processEvents();
        
                digitalWrite(4,1);
                //delay(0.5);//for milliseconds
                usleep(250);//for micro seconds
                digitalWrite(4,0);
                //delay(0.5);//for milliseconds
                usleep(250);//for micro seconds
            }
            digitalWrite(7,HIGH);
            popMessageBox();
            Mat image1 = imread("/home/pi/test.jpg");
            Mat roi4 = image1( Rect(2000,730,400,400));
            Mat roi5 = image1( Rect(1220,720,400,400));
            Mat roi6 = image1( Rect(445,745,400,400));
            imwrite("/home/pi/4.png", roi4);
            imwrite("/home/pi/5.png", roi5);
            imwrite("/home/pi/6.png", roi6);
            digitalWrite(7,LOW);
            digitalWrite(5,HIGH);
        
            for(int i=0;i<(34*50);i++)
            {
                QCoreApplication::processEvents();
        
                digitalWrite(4,1);
                //delay(0.5);//for milliseconds
                usleep(250);//for micro seconds
                digitalWrite(4,0);
                //delay(0.5);//for milliseconds
                usleep(250);//for micro seconds
            }
            digitalWrite(7,HIGH);
            popMessageBox();
            Mat image2 = imread("/home/pi/test.jpg");
            Mat roi7 = image2( Rect(2000,730,400,400));
            Mat roi8 = image2( Rect(1220,720,400,400));
            Mat roi9 = image2( Rect(445,745,400,400));
            imwrite("/home/pi/7.png", roi7);
            imwrite("/home/pi/8.png", roi8);
            imwrite("/home/pi/9.png", roi9);
            digitalWrite(7,LOW);
            digitalWrite(5,HIGH);
        
            for(int i=0;i<(34*50);i++)
            {
                QCoreApplication::processEvents();
        
                digitalWrite(4,1);
                //delay(0.5);//for milliseconds
                usleep(250);//for micro seconds
                digitalWrite(4,0);
                //delay(0.5);//for milliseconds
                usleep(250);//for micro seconds
            }
            digitalWrite(7,HIGH);
            popMessageBox();
            Mat image3 = imread("/home/pi/test.jpg");
            Mat roi10 = image3( Rect(2000,730,400,400));
            Mat roi11 = image3( Rect(1220,720,400,400));
            imwrite("/home/pi/10.png", roi10);
            imwrite("/home/pi/11.png", roi11);
        
            QPixmap pix1,pix2,pix3,pix4,pix5,pix6,pix7,pix8,pix9,pix10,pix11;
            pix1.load("/home/pi/11.png");
            pix2.load("/home/pi/10.png");
            pix3.load("/home/pi/9.png");
            pix4.load("/home/pi/8.png");
            pix5.load("/home/pi/7.png");
            pix6.load("/home/pi/6.png");
            pix7.load("/home/pi/5.png");
            pix8.load("/home/pi/4.png");
            pix9.load("/home/pi/3.png");
            pix10.load("/home/pi/2.png");
            pix11.load("/home/pi/1.png");
            pix1 = pix1.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
            pix2 = pix2.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
            pix3 = pix3.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
            pix4 = pix4.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
            pix5 = pix5.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
            pix6 = pix6.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
            pix7 = pix7.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
            pix8 = pix8.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
            pix9 = pix9.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
            pix10 = pix10.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
        
        
        
            ui->label_3->setPixmap(pix1);
            ui->label_4->setPixmap(pix2);
            ui->label_5->setPixmap(pix3);
            ui->label_6->setPixmap(pix4);
            ui->label_7->setPixmap(pix5);
            ui->label_8->setPixmap(pix6);
            ui->label_9->setPixmap(pix7);
            ui->label_10->setPixmap(pix8);
            ui->label_11->setPixmap(pix9);
            ui->label_12->setPixmap(pix10);
            ui->label_13->setPixmap(pix11);
            Scalar meanValue;
            meanValue = mean(roi1);
            
            qDebug()<<meanValue[0];
            qDebug()<<meanValue[1];
            qDebug()<<meanValue[2];
        
        
        }
        
        jsulmJ 1 Reply Last reply
        0
        • sankarapandiyanS sankarapandiyan

          @jsulm @JonB I have used process event( ), And i get a output what i want .. But at last both the progress bar gif windows and task windows are closed automatically .Here i want to hide a progress bar gif window at last , but here both windows are closed . So how to fix this problem .

          this is my code

          void MainWindow::on_pushButton_4_clicked()
          {
              QMovie*movie=new QMovie(":/somegif.gif");
              qDebug() << "test1";
                  if(!movie->isValid()){
                      //something went Wrong
                      return;
                  }
                  //play GIF
                  auto label=new QLabel();
                  label->resize(400,180);
                  label->setMovie(movie);
                  label->show();
                  movie->start();
          
                  QTimer*timer=new QTimer(this);
                  connect(timer,SIGNAL(timeout()),this,SLOT(PrintDebugInTimer()));
                  timer->start(1000);
                  //start time to close it after 10 sec
                  QTimer::singleShot(10000,[label,&timer]{
                     // label->close();
                      label->deleteLater();
                      timer->stop();
                  });
          
              Mat image = imread("/home/pi/test.jpg");
              //Rect myROI(445, 745, 400, 400);
              //Mat crop = image(myROI);
              //imwrite("/home/pi/1.png", crop);
              Mat roi1 = image( Rect(2000,730,400,400));
              Mat roi2 = image( Rect(1220,720,400,400));
              Mat roi3 = image( Rect(445,745,400,400));
              imwrite("/home/pi/1.png", roi1);
              imwrite("/home/pi/2.png", roi2);
              imwrite("/home/pi/3.png", roi3);
          
              digitalWrite(7,LOW);
              digitalWrite(5,HIGH);
          
              for(int i=0;i<(35*50);i++)
              {
                  QCoreApplication::processEvents();
          
                  digitalWrite(4,1);
                  //delay(0.5);//for milliseconds
                  usleep(250);//for micro seconds
                  digitalWrite(4,0);
                  //delay(0.5);//for milliseconds
                  usleep(250);//for micro seconds
              }
              digitalWrite(7,HIGH);
              popMessageBox();
              Mat image1 = imread("/home/pi/test.jpg");
              Mat roi4 = image1( Rect(2000,730,400,400));
              Mat roi5 = image1( Rect(1220,720,400,400));
              Mat roi6 = image1( Rect(445,745,400,400));
              imwrite("/home/pi/4.png", roi4);
              imwrite("/home/pi/5.png", roi5);
              imwrite("/home/pi/6.png", roi6);
              digitalWrite(7,LOW);
              digitalWrite(5,HIGH);
          
              for(int i=0;i<(34*50);i++)
              {
                  QCoreApplication::processEvents();
          
                  digitalWrite(4,1);
                  //delay(0.5);//for milliseconds
                  usleep(250);//for micro seconds
                  digitalWrite(4,0);
                  //delay(0.5);//for milliseconds
                  usleep(250);//for micro seconds
              }
              digitalWrite(7,HIGH);
              popMessageBox();
              Mat image2 = imread("/home/pi/test.jpg");
              Mat roi7 = image2( Rect(2000,730,400,400));
              Mat roi8 = image2( Rect(1220,720,400,400));
              Mat roi9 = image2( Rect(445,745,400,400));
              imwrite("/home/pi/7.png", roi7);
              imwrite("/home/pi/8.png", roi8);
              imwrite("/home/pi/9.png", roi9);
              digitalWrite(7,LOW);
              digitalWrite(5,HIGH);
          
              for(int i=0;i<(34*50);i++)
              {
                  QCoreApplication::processEvents();
          
                  digitalWrite(4,1);
                  //delay(0.5);//for milliseconds
                  usleep(250);//for micro seconds
                  digitalWrite(4,0);
                  //delay(0.5);//for milliseconds
                  usleep(250);//for micro seconds
              }
              digitalWrite(7,HIGH);
              popMessageBox();
              Mat image3 = imread("/home/pi/test.jpg");
              Mat roi10 = image3( Rect(2000,730,400,400));
              Mat roi11 = image3( Rect(1220,720,400,400));
              imwrite("/home/pi/10.png", roi10);
              imwrite("/home/pi/11.png", roi11);
          
              QPixmap pix1,pix2,pix3,pix4,pix5,pix6,pix7,pix8,pix9,pix10,pix11;
              pix1.load("/home/pi/11.png");
              pix2.load("/home/pi/10.png");
              pix3.load("/home/pi/9.png");
              pix4.load("/home/pi/8.png");
              pix5.load("/home/pi/7.png");
              pix6.load("/home/pi/6.png");
              pix7.load("/home/pi/5.png");
              pix8.load("/home/pi/4.png");
              pix9.load("/home/pi/3.png");
              pix10.load("/home/pi/2.png");
              pix11.load("/home/pi/1.png");
              pix1 = pix1.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
              pix2 = pix2.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
              pix3 = pix3.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
              pix4 = pix4.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
              pix5 = pix5.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
              pix6 = pix6.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
              pix7 = pix7.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
              pix8 = pix8.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
              pix9 = pix9.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
              pix10 = pix10.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
          
          
          
              ui->label_3->setPixmap(pix1);
              ui->label_4->setPixmap(pix2);
              ui->label_5->setPixmap(pix3);
              ui->label_6->setPixmap(pix4);
              ui->label_7->setPixmap(pix5);
              ui->label_8->setPixmap(pix6);
              ui->label_9->setPixmap(pix7);
              ui->label_10->setPixmap(pix8);
              ui->label_11->setPixmap(pix9);
              ui->label_12->setPixmap(pix10);
              ui->label_13->setPixmap(pix11);
              Scalar meanValue;
              meanValue = mean(roi1);
              
              qDebug()<<meanValue[0];
              qDebug()<<meanValue[1];
              qDebug()<<meanValue[2];
          
          
          }
          
          jsulmJ Offline
          jsulmJ Offline
          jsulm
          Lifetime Qt Champion
          wrote on last edited by
          #12

          @sankarapandiyan said in Time delay in loading progress bar (GIF Format):

          So how to fix this problem

          Sorry I don't understand you. What exactly do you want to close and when?

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

          sankarapandiyanS 1 Reply Last reply
          0
          • jsulmJ jsulm

            @sankarapandiyan said in Time delay in loading progress bar (GIF Format):

            So how to fix this problem

            Sorry I don't understand you. What exactly do you want to close and when?

            sankarapandiyanS Offline
            sankarapandiyanS Offline
            sankarapandiyan
            wrote on last edited by
            #13

            @jsulm actually the push button (in the First window )pressed the progress bar runs first , After loading the progress bar window ( second window ). while closing second window simultaneously the first and second windows closed together , But what i want is i need to stay the ( First window ) on rest . i dont want to close ...

            jsulmJ 1 Reply Last reply
            0
            • sankarapandiyanS sankarapandiyan

              @jsulm actually the push button (in the First window )pressed the progress bar runs first , After loading the progress bar window ( second window ). while closing second window simultaneously the first and second windows closed together , But what i want is i need to stay the ( First window ) on rest . i dont want to close ...

              jsulmJ Offline
              jsulmJ Offline
              jsulm
              Lifetime Qt Champion
              wrote on last edited by
              #14

              @sankarapandiyan Sorry, without code I have no idea...

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

              sankarapandiyanS 1 Reply Last reply
              0
              • jsulmJ jsulm

                @sankarapandiyan Sorry, without code I have no idea...

                sankarapandiyanS Offline
                sankarapandiyanS Offline
                sankarapandiyan
                wrote on last edited by sankarapandiyan
                #15

                @jsulm @JonB @small_bird @mrjj

                void MainWindow::on_pushButton_4_clicked()
                {
                    QMovie*movie=new QMovie(":/somegif.gif");
                    qDebug() << "test1";
                        if(!movie->isValid()){
                            //something went Wrong
                            return;
                        }
                        //play GIF
                        auto label=new QLabel();
                        label->resize(400,180);
                        label->setMovie(movie);
                        label->show();
                        movie->start();
                
                        QTimer*timer=new QTimer(this);
                        connect(timer,SIGNAL(timeout()),this,SLOT(PrintDebugInTimer()));
                        timer->start(1000);
                        //start time to close it after 10 sec
                        QTimer::singleShot(10000,[label,&timer]{
                           // label->close();
                            label->deleteLater();
                            timer->stop();
                        });
                
                    Mat image = imread("/home/pi/test.jpg");
                    //Rect myROI(445, 745, 400, 400);
                    //Mat crop = image(myROI);
                    //imwrite("/home/pi/1.png", crop);
                    Mat roi1 = image( Rect(2000,730,400,400));
                    Mat roi2 = image( Rect(1220,720,400,400));
                    Mat roi3 = image( Rect(445,745,400,400));
                    imwrite("/home/pi/1.png", roi1);
                    imwrite("/home/pi/2.png", roi2);
                    imwrite("/home/pi/3.png", roi3);
                
                    digitalWrite(7,LOW);
                    digitalWrite(5,HIGH);
                
                    for(int i=0;i<(35*50);i++)
                    {
                        QCoreApplication::processEvents();
                
                        digitalWrite(4,1);
                        //delay(0.5);//for milliseconds
                        usleep(250);//for micro seconds
                        digitalWrite(4,0);
                        //delay(0.5);//for milliseconds
                        usleep(250);//for micro seconds
                    }
                    digitalWrite(7,HIGH);
                    popMessageBox();
                    Mat image1 = imread("/home/pi/test.jpg");
                    Mat roi4 = image1( Rect(2000,730,400,400));
                    Mat roi5 = image1( Rect(1220,720,400,400));
                    Mat roi6 = image1( Rect(445,745,400,400));
                    imwrite("/home/pi/4.png", roi4);
                    imwrite("/home/pi/5.png", roi5);
                    imwrite("/home/pi/6.png", roi6);
                    digitalWrite(7,LOW);
                    digitalWrite(5,HIGH);
                
                    for(int i=0;i<(34*50);i++)
                    {
                        QCoreApplication::processEvents();
                
                        digitalWrite(4,1);
                        //delay(0.5);//for milliseconds
                        usleep(250);//for micro seconds
                        digitalWrite(4,0);
                        //delay(0.5);//for milliseconds
                        usleep(250);//for micro seconds
                    }
                    digitalWrite(7,HIGH);
                    popMessageBox();
                    Mat image2 = imread("/home/pi/test.jpg");
                    Mat roi7 = image2( Rect(2000,730,400,400));
                    Mat roi8 = image2( Rect(1220,720,400,400));
                    Mat roi9 = image2( Rect(445,745,400,400));
                    imwrite("/home/pi/7.png", roi7);
                    imwrite("/home/pi/8.png", roi8);
                    imwrite("/home/pi/9.png", roi9);
                    digitalWrite(7,LOW);
                    digitalWrite(5,HIGH);
                
                    for(int i=0;i<(34*50);i++)
                    {
                        QCoreApplication::processEvents();
                
                        digitalWrite(4,1);
                        //delay(0.5);//for milliseconds
                        usleep(250);//for micro seconds
                        digitalWrite(4,0);
                        //delay(0.5);//for milliseconds
                        usleep(250);//for micro seconds
                    }
                    digitalWrite(7,HIGH);
                    popMessageBox();
                    Mat image3 = imread("/home/pi/test.jpg");
                    Mat roi10 = image3( Rect(2000,730,400,400));
                    Mat roi11 = image3( Rect(1220,720,400,400));
                    imwrite("/home/pi/10.png", roi10);
                    imwrite("/home/pi/11.png", roi11);
                
                    QPixmap pix1,pix2,pix3,pix4,pix5,pix6,pix7,pix8,pix9,pix10,pix11;
                    pix1.load("/home/pi/11.png");
                    pix2.load("/home/pi/10.png");
                    pix3.load("/home/pi/9.png");
                    pix4.load("/home/pi/8.png");
                    pix5.load("/home/pi/7.png");
                    pix6.load("/home/pi/6.png");
                    pix7.load("/home/pi/5.png");
                    pix8.load("/home/pi/4.png");
                    pix9.load("/home/pi/3.png");
                    pix10.load("/home/pi/2.png");
                    pix11.load("/home/pi/1.png");
                    pix1 = pix1.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                    pix2 = pix2.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                    pix3 = pix3.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                    pix4 = pix4.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                    pix5 = pix5.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                    pix6 = pix6.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                    pix7 = pix7.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                    pix8 = pix8.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                    pix9 = pix9.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                    pix10 = pix10.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                
                
                
                    ui->label_3->setPixmap(pix1);
                    ui->label_4->setPixmap(pix2);
                    ui->label_5->setPixmap(pix3);
                    ui->label_6->setPixmap(pix4);
                    ui->label_7->setPixmap(pix5);
                    ui->label_8->setPixmap(pix6);
                    ui->label_9->setPixmap(pix7);
                    ui->label_10->setPixmap(pix8);
                    ui->label_11->setPixmap(pix9);
                    ui->label_12->setPixmap(pix10);
                    ui->label_13->setPixmap(pix11);
                    Scalar meanValue;
                    meanValue = mean(roi1);
                    
                    qDebug()<<meanValue[0];
                    qDebug()<<meanValue[1];
                    qDebug()<<meanValue[2];
                
                
                }
                

                this is my output
                i have checked

                with q debug

                https://postimg.cc/gallery/1e0w5cul2/

                This is my code and this is my out put

                jsulmJ 1 Reply Last reply
                0
                • sankarapandiyanS sankarapandiyan

                  @jsulm @JonB @small_bird @mrjj

                  void MainWindow::on_pushButton_4_clicked()
                  {
                      QMovie*movie=new QMovie(":/somegif.gif");
                      qDebug() << "test1";
                          if(!movie->isValid()){
                              //something went Wrong
                              return;
                          }
                          //play GIF
                          auto label=new QLabel();
                          label->resize(400,180);
                          label->setMovie(movie);
                          label->show();
                          movie->start();
                  
                          QTimer*timer=new QTimer(this);
                          connect(timer,SIGNAL(timeout()),this,SLOT(PrintDebugInTimer()));
                          timer->start(1000);
                          //start time to close it after 10 sec
                          QTimer::singleShot(10000,[label,&timer]{
                             // label->close();
                              label->deleteLater();
                              timer->stop();
                          });
                  
                      Mat image = imread("/home/pi/test.jpg");
                      //Rect myROI(445, 745, 400, 400);
                      //Mat crop = image(myROI);
                      //imwrite("/home/pi/1.png", crop);
                      Mat roi1 = image( Rect(2000,730,400,400));
                      Mat roi2 = image( Rect(1220,720,400,400));
                      Mat roi3 = image( Rect(445,745,400,400));
                      imwrite("/home/pi/1.png", roi1);
                      imwrite("/home/pi/2.png", roi2);
                      imwrite("/home/pi/3.png", roi3);
                  
                      digitalWrite(7,LOW);
                      digitalWrite(5,HIGH);
                  
                      for(int i=0;i<(35*50);i++)
                      {
                          QCoreApplication::processEvents();
                  
                          digitalWrite(4,1);
                          //delay(0.5);//for milliseconds
                          usleep(250);//for micro seconds
                          digitalWrite(4,0);
                          //delay(0.5);//for milliseconds
                          usleep(250);//for micro seconds
                      }
                      digitalWrite(7,HIGH);
                      popMessageBox();
                      Mat image1 = imread("/home/pi/test.jpg");
                      Mat roi4 = image1( Rect(2000,730,400,400));
                      Mat roi5 = image1( Rect(1220,720,400,400));
                      Mat roi6 = image1( Rect(445,745,400,400));
                      imwrite("/home/pi/4.png", roi4);
                      imwrite("/home/pi/5.png", roi5);
                      imwrite("/home/pi/6.png", roi6);
                      digitalWrite(7,LOW);
                      digitalWrite(5,HIGH);
                  
                      for(int i=0;i<(34*50);i++)
                      {
                          QCoreApplication::processEvents();
                  
                          digitalWrite(4,1);
                          //delay(0.5);//for milliseconds
                          usleep(250);//for micro seconds
                          digitalWrite(4,0);
                          //delay(0.5);//for milliseconds
                          usleep(250);//for micro seconds
                      }
                      digitalWrite(7,HIGH);
                      popMessageBox();
                      Mat image2 = imread("/home/pi/test.jpg");
                      Mat roi7 = image2( Rect(2000,730,400,400));
                      Mat roi8 = image2( Rect(1220,720,400,400));
                      Mat roi9 = image2( Rect(445,745,400,400));
                      imwrite("/home/pi/7.png", roi7);
                      imwrite("/home/pi/8.png", roi8);
                      imwrite("/home/pi/9.png", roi9);
                      digitalWrite(7,LOW);
                      digitalWrite(5,HIGH);
                  
                      for(int i=0;i<(34*50);i++)
                      {
                          QCoreApplication::processEvents();
                  
                          digitalWrite(4,1);
                          //delay(0.5);//for milliseconds
                          usleep(250);//for micro seconds
                          digitalWrite(4,0);
                          //delay(0.5);//for milliseconds
                          usleep(250);//for micro seconds
                      }
                      digitalWrite(7,HIGH);
                      popMessageBox();
                      Mat image3 = imread("/home/pi/test.jpg");
                      Mat roi10 = image3( Rect(2000,730,400,400));
                      Mat roi11 = image3( Rect(1220,720,400,400));
                      imwrite("/home/pi/10.png", roi10);
                      imwrite("/home/pi/11.png", roi11);
                  
                      QPixmap pix1,pix2,pix3,pix4,pix5,pix6,pix7,pix8,pix9,pix10,pix11;
                      pix1.load("/home/pi/11.png");
                      pix2.load("/home/pi/10.png");
                      pix3.load("/home/pi/9.png");
                      pix4.load("/home/pi/8.png");
                      pix5.load("/home/pi/7.png");
                      pix6.load("/home/pi/6.png");
                      pix7.load("/home/pi/5.png");
                      pix8.load("/home/pi/4.png");
                      pix9.load("/home/pi/3.png");
                      pix10.load("/home/pi/2.png");
                      pix11.load("/home/pi/1.png");
                      pix1 = pix1.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                      pix2 = pix2.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                      pix3 = pix3.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                      pix4 = pix4.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                      pix5 = pix5.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                      pix6 = pix6.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                      pix7 = pix7.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                      pix8 = pix8.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                      pix9 = pix9.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                      pix10 = pix10.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
                  
                  
                  
                      ui->label_3->setPixmap(pix1);
                      ui->label_4->setPixmap(pix2);
                      ui->label_5->setPixmap(pix3);
                      ui->label_6->setPixmap(pix4);
                      ui->label_7->setPixmap(pix5);
                      ui->label_8->setPixmap(pix6);
                      ui->label_9->setPixmap(pix7);
                      ui->label_10->setPixmap(pix8);
                      ui->label_11->setPixmap(pix9);
                      ui->label_12->setPixmap(pix10);
                      ui->label_13->setPixmap(pix11);
                      Scalar meanValue;
                      meanValue = mean(roi1);
                      
                      qDebug()<<meanValue[0];
                      qDebug()<<meanValue[1];
                      qDebug()<<meanValue[2];
                  
                  
                  }
                  

                  this is my output
                  i have checked

                  with q debug

                  https://postimg.cc/gallery/1e0w5cul2/

                  This is my code and this is my out put

                  jsulmJ Offline
                  jsulmJ Offline
                  jsulm
                  Lifetime Qt Champion
                  wrote on last edited by
                  #16

                  @sankarapandiyan Well, your app is actually crashing. The code is pretty messy to be honest.

                  QTimer*timer=new QTimer(this);
                  connect(timer,SIGNAL(timeout()),this,SLOT(PrintDebugInTimer()));
                  timer->start(1000);
                  //start time to close it after 10 sec
                  QTimer::singleShot(10000,[label,&timer]{
                  // label->close();
                      label->deleteLater();
                      timer->stop(); // It crashes here. Means timer is already destroyed - do you delete it or its parent somewhere?
                  });
                  

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

                  sankarapandiyanS 2 Replies Last reply
                  1
                  • jsulmJ jsulm

                    @sankarapandiyan Well, your app is actually crashing. The code is pretty messy to be honest.

                    QTimer*timer=new QTimer(this);
                    connect(timer,SIGNAL(timeout()),this,SLOT(PrintDebugInTimer()));
                    timer->start(1000);
                    //start time to close it after 10 sec
                    QTimer::singleShot(10000,[label,&timer]{
                    // label->close();
                        label->deleteLater();
                        timer->stop(); // It crashes here. Means timer is already destroyed - do you delete it or its parent somewhere?
                    });
                    
                    sankarapandiyanS Offline
                    sankarapandiyanS Offline
                    sankarapandiyan
                    wrote on last edited by sankarapandiyan
                    #17
                    This post is deleted!
                    1 Reply Last reply
                    0
                    • jsulmJ jsulm

                      @sankarapandiyan Well, your app is actually crashing. The code is pretty messy to be honest.

                      QTimer*timer=new QTimer(this);
                      connect(timer,SIGNAL(timeout()),this,SLOT(PrintDebugInTimer()));
                      timer->start(1000);
                      //start time to close it after 10 sec
                      QTimer::singleShot(10000,[label,&timer]{
                      // label->close();
                          label->deleteLater();
                          timer->stop(); // It crashes here. Means timer is already destroyed - do you delete it or its parent somewhere?
                      });
                      
                      sankarapandiyanS Offline
                      sankarapandiyanS Offline
                      sankarapandiyan
                      wrote on last edited by
                      #18

                      @jsulm said in Time delay in loading progress bar (GIF Format):

                      It crashes here. Means timer is already destroyed

                      You are Absolutely Right!!!!!!

                      Now its Works .. Great Thanks ................ @jsulm @mrjj @JonB

                      1 Reply Last reply
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