The Description Of The Defined Connections And Slots

The element <connections> contains any number of <connection> elements, which each describe one connection between the widgets of this form. The <connection> element has the following subelements, and there must be exactly one of each:

<sender>

This element specifies the name of the sender widget.

<signal>

This element specifies the name of the signal.

<receiver>

This element specifies the name of the receiver widget.

<slot>

This element specifies the name of the slot.

Since it is possible to add custom slots to forms that widgets can connect to, these custom slots are defined in this element as well. For each slot, there is a <slot> element, which has an attribute named access that describes the access policy of this slot; valid values are public and protected.