问QProgressDialog:如何调整宽度以显示整个进度条？

EN

auto dialog = new QProgressDialog();
dialog->setWindowTitle("Progress");
dialog->setLabelText("Test progress dialog");

auto bar = new QProgressBar(dialog);
bar->setTextVisible(true);
bar->setValue(50);
bar->setFormat("Processing section %v of %m. Percentage completed: %p");
dialog->setBar(bar);

// Use QFontMetrics to get the width of the bar text,
// and then add 100px for the progress bar itself. Set
// this to the initial dialog width.
int width = QFontMetrics(bar->font()).width(bar->text()) + 100;
dialog->resize(width, dialog->height());
dialog->show();

dialog->setMinimumWidth(300);