Custom QProgressDialog

shahriar25

Hi
I wanted to build a custom progress dialog for my project so I built a dialog with a progressBar in the ui and two public functions:
void setProgressBarValue(int value)
{
ui->progressBar->setValue(value);
}

void setProgressBarRange(int min, int max)
{
ui->progressBar->setRange(min, max);
}

And in my project:

myProgressDialog *dialog = new myProgressDialog;
dialog.setProgressBarRange(0,100);
dialog.show();

for (int i=0; i<=100; ++i)
{
dialog.setProgressBarValue(i);
}

And when I run it it shows the dialog but inside the dialog is black until it reaches 100
I know I'm doing everything wrong so can someone tell me how to do it?

kshegunov

Hello,
Your code doesn't allow for the events to be processed between the calls to dialog.setProgressBarValue(i);, this is why the first paint event you'll get processed is after the loop finishes. You could manually request events to be processed in the loop by using QCoreApplication::processEvents.

Kind regards.

shahriar25

Hi,
Thank you so much. I did it.