As the title says this is about replacing the default title bar (the bar that holds the widget's name and the close/undock buttons). The advantage is that there are no more native window decorations for floating widgets. And we could add a fullscreen button for widgets to the other buttons (according to the internet fullscreen for floating widgets works on Windows, but that is still unconfirmed. Even if it doesn't work, we could implement a "borderless windowed fullscreen mode").
The disadvantage is that Qt is like: You want to have access to the default title bar? Fuck you, I won't give you access. When you want to have a custom title bar, implement your own from scratch. And by the way, you will break your style sheets if you do so.
As the title says this is about replacing the default title bar (the bar that holds the widget's name and the close/undock buttons). The advantage is that there are no more native window decorations for floating widgets. And we could add a fullscreen button for widgets to the other buttons (according to the internet fullscreen for floating widgets works on Windows, but that is still unconfirmed. Even if it doesn't work, we could implement a "borderless windowed fullscreen mode").
The disadvantage is that Qt is like: You want to have access to the default title bar? Fuck you, I won't give you access. When you want to have a custom title bar, implement your own from scratch. And by the way, you will break your style sheets if you do so.