使QMenu标签加粗而不影响其子级

Question

I'm trying to change the styling and/or font of the label/text on the QMenu, without affecting it's children. I'm doing this in Python with PySide (which works just like Qt).

I've tried:

menu = QtGui.QMenu()
f = menu.font()
f.setBold(True)
menu.setFont(f)

And

menu = QtGui.QMenu()
menu.setStyleSheet("QMenu{font-weight: bold;}")

Both of these would not change the label of the menu itself, yet will do it on all of its children.

I would prefer to set the styling directly on the QMenu (or another class if it acts similarly and makes it possible) instead of applying a stylesheet on its parent.

Goals

The idea is that I have a menu with a variety of sub-menus (which are somewhat dynamic based on folders on a server) of which some need to be Bold and some Italic. Therefore I would like to add these sub QMenu's dynamically and style them accordingly.

Answer 1

You can achieve it easy. To understand the logic:

• QMenu - is a widget which displays items
• When you add QMenu to another QMenu QMenu::menuAction is placed in a base menu.
• If you want to customize how your submenu looks when it's added to a base menu, you need to customize the menuAction .

So to make you menu bold you just need to set a bold font to menuAction of this menu.

Here is a simple working example:

QMenu m; //base menu
QMenu sub; //sub menu
sub.setTitle("subMenu");

QAction* a1 = new QAction("act1", &m);
QAction* a2 = new QAction("act2", &m);
QAction* a3 = new QAction("act3", &m);

// set a bold font for a sub menu item
QFont f = sub.menuAction()->font();
f.setBold(true);    
sub.menuAction()->setFont(f);

// add an action to the sub menu
sub.addAction(a3);

// add two actions and the sub menu to the base menu
m.addAction(a1);
m.addMenu(&sub);
m.addAction(a2);

// show the base menu
m.exec(QCursor::pos());

Answer 2

Read the Qt documentation about QSS selectors .

For your case: you could not directly customize labels of specific menu items. But you may insert QWidgetAction insead of QAction and customize it as you want (place a label on QWidgetAction and customize it).