Connections Class Reference

A Connections element describes generalized connections to signals. More...

Detailed Description

A Connections element describes generalized connections to signals.

Since

4.7

A Connections object creates a connection to a QML signal.

When connecting to signals in QML, the usual way is to create an "on<Signal>" handler that reacts when a signal is received, like this:

MouseArea {
    onClicked: { foo(parameters) }
}

However, it is not possible to connect to a signal in this way in some cases, such as when:

• Multiple connections to the same signal are required
• Creating connections outside the scope of the signal sender
• Connecting to targets not defined in QML

When any of these are needed, the Connections element can be used instead.

For example, the above code can be changed to use a Connections object, like this:

MouseArea {
    Connections {
        onClicked: foo(parameters)
    }
}

More generally, the Connections object can be a child of some object other than the sender of the signal:

MouseArea {
    id: area
}
// ...

Connections {
    target: area
    onClicked: foo(parameters)
}

See also

QtDeclarative

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The documentation for this class was generated from the following file:

• /src/declarative/util/qdeclarativeconnections.cpp