How to insert a progress bar before a dialog is displayed?

Qt_crazyer

I was troubled by the progress bar recently.
Because one of my dialog has a long opening time, I want to insert a progress bar during the waiting period to show the progress of the dialog opening.
How should I do it? Thanks for all advice！

m_SerialPortDialog->show();

m_ProgressBar->show();
m_ProgressBar->setRange(0,100);
for(int i=1;i<=100;i++)
      m_ProgressBar->setValue(i);

Pradeep Kumar

Hi,

Add the progressbar to the widget , make the widget background transparent, before showing up dialog.
Show the progressbar before the dialog is shown.
Once the dialog is shown, hide the progressbar.

Thanks,

jsulm

@Qt_crazyer From design/usability point of view it would be better if the dialog itself would handle this. It should show a progress bar as long as it is busy and then the normal content.

Pradeep Kumar

@jsulm ,

meaning using only one dialog to both the contents, progressbar and actual information, using progressbar make it indicating till actual information needs to be displayed in the same dialog.

Thanks,

Pradeep Kumar

Hi,

@Qt_crazyer ,

Inherit from QDialog, ur own class, add progressbar , then update the progressbar untill u get the value or the corresponding information in dialog, then make progressbar visible false.

Before getting the value :

After getting the value :

the output is sample one, u can replace with the info (value 21) which u required.
the window dialog(progressbar) opens on click of button, here it is just a sample program.

Thanks,

Pablo J. Rogina

@Qt_crazyer just in case there's a QProgressDialog class that you can even combine with QFutureWatcher class to monitor the progress of a long-running operationlike this example does.

Qt_crazyer

@Pradeep-Kumar
It's really a good way to do it. Thank you.