setBar ( QProgressBar * bar )

[hvw59601]

Hi,

I now use QProgressDialog to create a modeless progress dialog.

But I want to change what that shows by default: percentages.

So I have to use setBar() + I have a question:

When I use setBar() who does the progress counting with setValue() now, the progress bar or the progress dialog?

Thanks!

[jpn]

So I have to use setBar() + I have a question:

When I use setBar() who does the progress counting with setValue() now, the progress bar or the progress dialog?

Hmm, what do you mean? QProgressDialog is a wrapper dialog around the progress bar. Calling QProgressDialog::setValue() calls further QProgressBar::setValue(). However, you should use QProgressDialog::setValue(), not QProgressBar::setValue() directly, because QProgressDialog::setValue() does other things too (like handles QProgressDialog::minimumDuration).

[hvw59601]

However, you should use QProgressDialog::setValue()

That's the answer I was looking for. It wasn't clear to me, because you can setValue() with both QProgressBar and QProgressDialog.
Thanks again.

[hvw59601]

But I get a QProgressDialog without a bar.

Let me rephrase the question: what is the minimum I have to do, given I have a working QProgressDialog, to get a bar that shows nothing: no percentage, nothing, that just moves.

[wysota]

Set both minimum and maximum values to 0.

[hvw59601]

Still no bar.

I have a working QProgressDialog. It shows percentages. The default. Which I don't want.

So then I add in the application constructor:

progress = new QProgressBar( );
    progress->setFormat(" ");
    progress->setMaximum(0);
    progress->setMinimum(0);
...
    progressDialog->setBar(progress);

progress = new QProgressBar( );
    progress->setFormat(" ");
    progress->setMaximum(0);
    progress->setMinimum(0);
...
    progressDialog->setBar(progress);

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and the result is a QProgressDialog without a bar at all.

[wysota]

But why do you insist on placing your own bar on the dialog?

This is what I get using the following code:

#include <QProgressDialog>
#include <QApplication>
 
int main(int argc, char **argv){
  QApplication app(argc, argv);
  QProgressDialog dlg;
  dlg.setRange(0,0);
  dlg.exec();
  return 0;
}

#include <QProgressDialog>
#include <QApplication>

int main(int argc, char **argv){
  QApplication app(argc, argv);
  QProgressDialog dlg;
  dlg.setRange(0,0);
  dlg.exec();
  return 0;
}

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[ShaChris23]

hvw59601,

I ran into the same problem as yours. The problem is you have to pass the pointer to QProgressDialog to the constructor of QProgressBar.

Like this:

QProgressDialog dialog;    
QProgressBar* progress = new QProgressBar(&dialog);
progress->setFormat(" ");
progress->setMaximum(0);
progress->setMinimum(0);
dialog.setBar(progress);

QProgressDialog dialog;    
QProgressBar* progress = new QProgressBar(&dialog);
progress->setFormat(" ");
progress->setMaximum(0);
progress->setMinimum(0);
dialog.setBar(progress);

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I hope that helps.