Help with progressbar

Jedd

I'm having trouble getting a progressbar to work in a dialog. It never triggers, doesn't move. However, I can take this code and plop it into mainwiindow.cpp and it works as expected.

Edit: if I click the mainwindow's titlebar then click the dialog's titlebar the bar moves a bit, but only when I do the clicks...???

 ui->progressBar->setHidden(false);
 ui->progressBar->setValue(0);

QTimer *timer = new QTimer(this);
connect(timer, SIGNAL(timeout()), this, SLOT(usbTimerEvent()));
timer->start(2000);



  void usbfileDialog::usbTimerEvent()
     {
         int value = ui->progressBar->value()
         if (value >= 100)
          {
                value = 0;
                ui->progressBar->reset();
          }   
         ui->progressBar->setValue(value+1);
   }

Ni.Sumi

@Jedd
I have tired your code. Seems there is no error in the provided code and its works. Where is the Dialog and how you implemented the Dialog in to Mainwindow ?
This is the code , I have tested.

MainWindow::MainWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::MainWindow)
{
    ui->setupUi(this);
    mydialog = new QDialog(this);
    QHBoxLayout *mylayout = new QHBoxLayout(this);
    mylayout->addWidget(ui->progressBar);
    mydialog->setLayout(mylayout);
    mydialog->show();
    ui->progressBar->setHidden(false);
    ui->progressBar->setValue(0);
    QTimer *timer = new QTimer(this);
    qDebug() << connect(timer, SIGNAL(timeout()), this, SLOT(valueChange()));
    timer->start(1000);
}

MainWindow::~MainWindow()
{
    delete ui;
}

void MainWindow::valueChange()
{
         int value = ui->progressBar->value();
         if (value >= 100)
          {
                value = 0;
                ui->progressBar->reset();
          }
         ui->progressBar->setValue(value+1);
   }

Jedd

For me, the dialog is called via a button press

   void MainWindow::on_fmButton_clicked()
       {
         fmdialog = new usbfileDialog(this);
         fmdialog->setModal(false);
         fmdialog->show();   
     }

The dialog code is below:

           usbfileDialog::usbfileDialog(QWidget *parent) :
             QDialog(parent),
               ui(new Ui::usbfileDialog)
             {   
                  ui->setupUi(this); 
                      ui->usbprogressBar->setHidden(false);
                      ui->usbprogressBar->setValue(0);

                      QTimer *timer = new QTimer(this);
                      connect(timer, SIGNAL(timeout()), this, SLOT(usbTimerEvent()));
                     timer->start(2000);
            }


        usbfileDialog::~usbfileDialog()
          {
             delete ui;
          }

Ni.Sumi

@Jedd

I have attached the copy as you said. I did not see any problem like that. do you have any other widget in it ?

Link to test

And by default setModal is false. you don't need to set to false and show() pops up the dialog as modeless.

Edit:

may be , you need this qApp->processEvents(); If it is busy in running some other local loop with out an event loop / busy in performing the long operation.

Jedd

Thanks for the replies. I'll keep looking into it.

Jedd

This is weird, but I had applied a vertical layout to this dialog so it would resize a listbox properly. I removed the layout and the progress bar works properly. So solved, I guess...