Three pushButtons in a shape of one

[Kenji_Takahashi]

Hi all,

It finally happened - I have a problem.
I want to make a custom QPushButton with three separated areas doing different actions. See the attachment for mock-up.
I managed to draw it (as you can see) and even implement the actions I want, but I'm stuck with the look, I have no idea how to change the state of just one part of the button.
So, the question is: How to create such button with the ability to change the state of each part, without actually splitting it into three (because it will look..weird)?