The slot is the space between the face-off circles in an offensive zone. It is also the area right in front of a goaltender. In a rink, there is a low slot and a high slot.
Slots are defined as virtual components, as in, “I want to use my private slot in a class that doesn’t have slots.” However, signals can also be connected to slots. This is much less expensive than calling a receiver directly.
For example, in a video slot machine, there is a pay table listing credits for winning combinations. A jackpot consists of the total amount of money the player has bet on a machine. If the symbols match, the player wins the jackpot.
Slots are useful for organizing meetings and consultations with colleagues and managers. They can also be used to establish deadlines and allocate resources to specific projects.
To connect a signal to a slot, you use the QObject::connect() function. Connecting a signal to a slot is slightly slower than calling the receiver directly. But it’s worth the extra overhead.
The signals and slots mechanism is very flexible. You can use it to call arbitrary classes. However, the class you emit the signal from must be defined in the slot’s context. If you’re emitting a signal from a class that doesn’t define a slot, the slot will invoke a class that does.
The slot is an element in the Web Components technology suite. As a result, you can create separate DOM trees and set global attributes.