Handling colorSchemeChanged

Perdrix

I have a class that initialises a colour name in the ctor initialiser list:

windowColourName{ palette().color(QPalette::ColorRole::Window).name()},	// Default base window colour

If the active windows theme is a Light theme it is set to "#f0f0f0" at that point.

If the active windows theme is a Dark theme it is set to "#1e1e1e"

If I switch themes, I enter this code:

void ExplorerBar::onColorSchemeChanged(Qt::ColorScheme scheme)
{
	//
	// Dark colour scheme?
	//
	if (Qt::ColorScheme::Dark == scheme)
		activeGroupColourName = "darkcyan";
	else
		activeGroupColourName = "lightcyan";

	windowColourName = palette().color(QPalette::ColorRole::Window).name();	// Default base window colour

	const auto tabID = dssApp->tab();
	if (IDD_REGISTERING == tabID)
	{
		ui->registerAndStack->setStyleSheet(QString("background-color: %1").arg(activeGroupColourName));
		ui->processing->setStyleSheet(QString("background-color: %1").arg(windowColourName));
	}
	else
	{
		ui->registerAndStack->setStyleSheet(QString("background-color: %1").arg(windowColourName));
		ui->processing->setStyleSheet(QString("background-color: %1").arg(activeGroupColourName));
	}
	ui->options->setStyleSheet(QString("background-color: %1").arg(activeGroupColourName));

	makeLinks();
}

My problem is that the line that sets windowColourName is returning #1e1e1e when switching to a light theme from a Dark theme, or #f0f0f0 when switching the other way.

What do I need to call to ensure I pick up the updated window colour?

Thanks
David

SGaist

Hi,

You should add which OS you are getting this behaviour on.

Just a guess, but Qt 6.5.0 ?

Perdrix

@SGaist Sorry, 6.5.0 Windows 11 22H2

Perdrix

I've reported this as a bug ...

https://bugreports.qt.io/browse/QTBUG-112653

Thanks
David

SGaist

You should add a minimal compilable project to the bug report.

That will make things easier to test and reproduce.

Perdrix

@SGaist Further digging has determined that the Palette colours are NOT BEING UPDATED AT ALL when the theme is changed.