Enabled -> User Interaction possible.
Disabled -> User interaction not possible.
- if you hover the mouse over a widget, it is focussed
- If you make a press-down (half click) on that widget, it is pressed
- If you press-down and press-up while the mouse is at the same position, it is selected
与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…