PyQt5 QCalendarWidget - Background Color to the Previous Month button

In this article we will see how we can set background color to the previous month button of the QCalendarWidget. Previous month button is on the left hand size in the tool buttons, tool buttons are the buttons available at the top i.e buttons to go to left and right page, setting background to QCalendarWidget is not like setting background to the other widgets, calendar is widget which has many child i.e component we can set border to independent component as well. We can set border to the tool buttons with the help of QCalendarWidget QToolButton as class name in the style sheet, but this will set border to all the elements of the tool buttons. In order to do this we will use setStyleSheet method with the QCalendarWidget object, below is the style sheet code

QCalendarWidget QToolButton#qt_calendar_prevmonth
{
background-color : lightgreen;
}
QCalendarWidget QToolButton#qt_calendar_prevmonth::hover
{
background-color : lightgreen;
}
QCalendarWidget QToolButton#qt_calendar_prevmonth::pressed
{
background-color : lightgreen;
}

Note : We use QToolButton#qt_calendar_prevmonth::hover and QToolButton#qt_calendar_prevmonth::pressed to add background color only when mouse hover over them or when they get pressed. There are also !hover and !pressed which are opposite states for the hover and pressed states. Below is the implementation Output :