QMenu exclusive items oddity

[mentalmushroom]

Hello. I've noticed a strange behavior of exclusive menu items. Take a look at the following sample:

#include <QApplication>
#include <QtGui>
#include <QActionGroup>
 
int main(int argc, char* argv[])
{
	QApplication app(argc, argv);
 
	QMenu menu;
	QObject::connect(&menu, SIGNAL(aboutToHide()), &app, SLOT(quit()));
 
	QActionGroup actionGroup(&menu);
	actionGroup.setExclusive(true);
 
	for (int i = 0; i < 3; ++i)
	{
		QAction *action = actionGroup.addAction(QString("Action %1").arg(i));
		action->setCheckable(true);
		action->setChecked(i == 1);
	}
 
	menu.addActions(actionGroup.actions());
	menu.show();
 
	return app.exec();
}

#include <QApplication>
#include <QtGui>
#include <QActionGroup>

int main(int argc, char* argv[])
{
	QApplication app(argc, argv);
	
	QMenu menu;
	QObject::connect(&menu, SIGNAL(aboutToHide()), &app, SLOT(quit()));
	
	QActionGroup actionGroup(&menu);
	actionGroup.setExclusive(true);
	
	for (int i = 0; i < 3; ++i)
	{
		QAction *action = actionGroup.addAction(QString("Action %1").arg(i));
		action->setCheckable(true);
		action->setChecked(i == 1);
	}

	menu.addActions(actionGroup.actions());
	menu.show();

	return app.exec();
}

To copy to clipboard, switch view to plain text mode 

This works as expected and produces the following menu with exclusive item selection list:
Clipboard01.png

Now I want to apply a very basic stylesheet to the menu, just to change a color. Here goes the qss script:

QMenu
{
	background-color: grey;
	color: #000000;
}

QMenu
{
	background-color: grey;
	color: #000000;
}

To copy to clipboard, switch view to plain text mode 

Now apply the stylesheet (only 3 lines of code added):

#include <QApplication>
#include <QtGui>
#include <QActionGroup>
 
int main(int argc, char* argv[])
{
	QApplication app(argc, argv);
 
	// apply stylesheet
	QFile qssFile(":/stylesheet/style.qss");
	qssFile.open(QIODevice::ReadOnly);
	app.setStyleSheet(qssFile.readAll());
 
	QMenu menu;
	QObject::connect(&menu, SIGNAL(aboutToHide()), &app, SLOT(quit()));
 
	QActionGroup actionGroup(&menu);
	actionGroup.setExclusive(true);
 
	for (int i = 0; i < 3; ++i)
	{
		QAction *action = actionGroup.addAction(QString("Action %1").arg(i));
		action->setCheckable(true);
		action->setChecked(i == 1);
	}
 
	menu.addActions(actionGroup.actions());
	menu.show();
 
	return app.exec();
}

#include <QApplication>
#include <QtGui>
#include <QActionGroup>

int main(int argc, char* argv[])
{
	QApplication app(argc, argv);
	
	// apply stylesheet
	QFile qssFile(":/stylesheet/style.qss");
	qssFile.open(QIODevice::ReadOnly);
	app.setStyleSheet(qssFile.readAll());

	QMenu menu;
	QObject::connect(&menu, SIGNAL(aboutToHide()), &app, SLOT(quit()));
	
	QActionGroup actionGroup(&menu);
	actionGroup.setExclusive(true);
	
	for (int i = 0; i < 3; ++i)
	{
		QAction *action = actionGroup.addAction(QString("Action %1").arg(i));
		action->setCheckable(true);
		action->setChecked(i == 1);
	}

	menu.addActions(actionGroup.actions());
	menu.show();

	return app.exec();
}

To copy to clipboard, switch view to plain text mode 

Exclusive indicators are changed and look like non-exclusive:
Clipboard02.png

Am I doing something wrong? How can this behavior be fixed?

[Spitfire]

To avoid that use palette or you'll need to manually style all children AFAIK.