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Just as an object does not know if something receives its signals, a slot doesn't know if it has any alerts linked to it. Qt's widgets have many predefined indicators, however we can all the time subclass widgets so as to add our own signals to them. Slots can be used for receiving alerts, however they are also normal member functions.
What is Plikli?

Plikli is an open source content management system that lets you easily create your own user-powered website.

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