External/common/TimeSelect/QSS/timewidget.qss

QPushButton
{
	border-image: url(:/images/datetime.png);
}
QPushButton[selected=true]
{
	border-image: url(:/images/datetime.png);
}
QPushButton::hover[selected=true]
{
	border-image: url(:/images/cancle.png);
}