<![CDATA[Problem with QFileDialog and QFileDialog::DontUseNativeDialog]]>Error with the preview of image files, they are not shown. If I use it natively, the preview is shown. Any solution?
Here is my code

QFileDialog dialog(padre, "Load Icon", nombreFile, "Image files (*.png *.jpg *.bmp *.gif)");
dialog.setFileMode(QFileDialog::ExistingFile);
dialog.setViewMode(QFileDialog::List);
dialog.setOptions(QFileDialog::DontUseNativeDialog);
dialog.setGeometry(padre->geometry());
QString nombreFile1;
if (dialog.exec()==QDialog::Accepted)
	nombreFile1 = dialog.selectedFiles().first();
rect=dialog.geometry();
if (nombreFile1.isEmpty())
	nombreFile=dialog.directory().absolutePath();
else
{
	nombreFile=nombreFile1;
	QPixmap pixmap(nombreFile);
	if (pixmap.isNull())
		error(MainWindow::tr("File fault"));
	else
	{
		pixmap=pixmap.scaled(100, 100, Qt::KeepAspectRatio, Qt::SmoothTransformation);
		pixmap.save(sss);
		rt=true;
	}
}

And this is how it looks with DontUseNativeDialog

573cae99-261d-4a48-b48c-fa6ba2d79ed1-image.png

And now with native
8d1a1715-2ec2-4ab8-80b5-37a653cfb53c-image.png

]]>https://forum.qt.io/topic/141974/problem-with-qfiledialog-and-qfiledialog-dontusenativedialogRSS for NodeMon, 20 Apr 2026 18:23:33 GMTThu, 05 Jan 2023 13:17:59 GMT60<![CDATA[Reply to Problem with QFileDialog and QFileDialog::DontUseNativeDialog on Tue, 10 Jan 2023 16:57:29 GMT]]>@JonexElectronic
If (a) the non-native (i.e. Qt) dialog does not offer preview and (b) the native one either also does not or for some reason you cannot use it, then you would have no choice but to write your own which did offer this "preview" facility.

]]>https://forum.qt.io/post/743305https://forum.qt.io/post/743305Tue, 10 Jan 2023 16:57:29 GMT<![CDATA[Reply to Problem with QFileDialog and QFileDialog::DontUseNativeDialog on Tue, 10 Jan 2023 16:34:16 GMT]]>@Christian-Ehrlicher So, what should I use? Is there something I can use then that allows me to preview?

]]>https://forum.qt.io/post/743297https://forum.qt.io/post/743297Tue, 10 Jan 2023 16:34:16 GMT<![CDATA[Reply to Problem with QFileDialog and QFileDialog::DontUseNativeDialog on Thu, 05 Jan 2023 15:43:00 GMT]]>@JonexElectronic said in Problem with QFileDialog and QFileDialog::DontUseNativeDialog:

Error with the preview of image files, they are not shown. If I use it natively, the preview is shown. Any solution?

dialog.setViewMode(QFileDialog::List);

What do you expect when you set QFileDialog::List? The Qt filedialog does not support previews.

]]>https://forum.qt.io/post/742662https://forum.qt.io/post/742662Thu, 05 Jan 2023 15:43:00 GMT