[Qt-qml] how to connect to destroyed signal in QML/javascrit?

[Timo Strömmer]

Hi,

Does the Connections element have a Component.onDestruction of its own,
which gets hooked in this case?

    - Timo

On 11/22/11 7:53 AM, "Pekka.E.Jokela at nokia.com" <Pekka.E.Jokela at nokia.com>
wrote:

>Anyone? So the get-Me-Item function returns any QObject derivates.
>
>-----Original Message-----
>From: qt-qml-bounces+pekka.e.jokela=nokia.com at qt.nokia.com
>[mailto:qt-qml-bounces+pekka.e.jokela=nokia.com at qt.nokia.com] On Behalf
>Of Jokela Pekka.E (Nokia-MP-Qt/Tampere)
>Sent: 16 November, 2011 13:34
>To: Kennedy Aaron (Nokia-DES-Qt/Brisbane)
>Cc: qt-qml at qt.nokia.com
>Subject: Re: [Qt-qml] how to connect to destroyed signal in QML/javascrit?
>
>Hi,
>can you be a bit more specific?
>
>I've tried it as:
>
>var someItem = getMeItem()
>connectionsElement.target = someItem
>someItem.destroy()
>
>
>With helper functions/QML:
>            function getMeItem() {
>                // dummy
>                return Qt.createQmlObject('import QtQuick 2.0; Rectangle
>{ Component.onDestruction: console.log(\"XXX ~Rectangle. this I cannot
>access") }', root)
>            }
>
>            Connections {
>                id: connectionsElement
>                target: null
>                Component.onDestruction: someItemDeleted()
>            }
>
>            function someItemDeleted() {
>                console.log("XXX someItem deleted. This I want get called
>")
>            }
>
>The ~Rectangle gets called but not someItemDeleted function.
>
> -P
>________________________________________
>From: Kennedy Aaron (Nokia-DES-Qt/Brisbane)
>Sent: Wednesday, November 16, 2011 12:03 PM
>To: Jokela Pekka.E (Nokia-MP-Qt/Tampere)
>Cc: <qt-qml at qt.nokia.com>
>Subject: Re: [Qt-qml] how to connect to destroyed signal in QML/javascrit?
>
>Hi,
>
>Try connecting to the "Component.onDestruction" signal.
>
>Cheers,
>
>Aaron
>
>On 16/11/2011, at 8:46 AM, ext
>Pekka.E.Jokela at nokia.com<mailto:Pekka.E.Jokela at nokia.com> wrote:
>
>Hi,
>How do I know when item is deleted (destructor called) in QML/JavaScript?
>
>I tried:
>Connections {
>    target: someItem
>    onDestroyed: console.log("someItem deleted") } ==> results: QML
>Connections: Cannot assign to non-existing property "onDestroyed"
>
>And in JavaScript:
>someItem.destroyed.connect(loggingItem, someItemDeletedFunction) ==>
>results: TypeError: Cannot call method ´connect´of undefined.
>
>Reading the documentation and the code (5.0), the QObject has signal
>destroyed(). The someItem is defined in cpp and it's registed to QML
>(otherwise it works fine). Replacing the code snippets with any other
>signal works fine.
>
>Any ideas?
>
>Thanks,
>-Pekka
>
>P.s I do not control the construction of the item so I cannot override
>the Component.onCompleted: in the element definition.
>_______________________________________________
>Qt-qml mailing list
>Qt-qml at qt.nokia.com<mailto:Qt-qml at qt.nokia.com>
>http://lists.qt.nokia.com/mailman/listinfo/qt-qml
>
>_______________________________________________
>Qt-qml mailing list
>Qt-qml at qt.nokia.com
>http://lists.qt.nokia.com/mailman/listinfo/qt-qml
>_______________________________________________
>Qt-qml mailing list
>Qt-qml at qt.nokia.com
>http://lists.qt.nokia.com/mailman/listinfo/qt-qml