[Qt-qml] [SOLVED] Signal of Child-Elements in C++?

[Girish Ramakrishnan]

No, if you have to do something like below, you are not doing it correctly :-)

Instead expose your C++ object to QML and call the c++ slot from QML.

Girish

On Sat, Sep 10, 2011 at 8:07 AM, Christian Benjamin Ries
<christian_benjamin.ries at fh-bielefeld.de> wrote:
> Solved:
> [CPP]
> for(int i=0; i<COUNT; i++) {
>     QString objName = QString("service%1").arg(i);
>     QObject *serviceObject = objectHost->findChild<QObject*>(objName);
>     connect(serviceObject, SIGNAL(serviceIndicatorClicked(int)),
>                   this, SLOT(serviceIndicatorClicked(int)));
>   }
> [/CPP]
>
> Am 10/09/11 14:28, schrieb Christian Benjamin Ries:
>
> Hello,
>
> can you give me an advice how I could connect signals by childs to my
> C++-implementation?
>
> I have following QML-structure:
> [QML]
> // Service.qml
> Item {
>   id: service;
>   signal serviceIndicatorClicked(int index);
>
>   Rectangle {
>       id: serviceIndicator;
>       ...
>       MouseArea {
>         anchors.fill: parent;
>         acceptedButtons: Qt.LeftButton;
>         onClicked: {
>           serviceIndicatorClicked(index);
>         }
>       }
>     }
> }
>
> // Host.qml
> Rectangle {
>   id: hostItem;
>
>   Service {
>     ...
>   }
> }
> [/QML]
>
> I try to connect this signal with following lines:
> [CPP]
> connect(objectHost, SIGNAL(serviceIndicatorClicked(int)),
>               this, SLOT(serviceIndicatorClicked(int)));
> [/CPP]
>
> Then my result is:
> [OUTPUT]
>
> Object::connect: No such signal Host_QMLTYPE_1::serviceIndicatorClicked(int)
>
> Object::connect: (receiver name: 'MainWindow')
>
> [/OUTPUT]
>
> Of course, this makes sense to me, because the signal of the child is not
> visible and not part of Host, right?
>
> Is there an easy way to use this signal?
>
> Cheers, Christian
>
>
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>
> --
> Dipl.-Ing. (FH) Christian Benjamin Ries, M.Sc.
> University of Applied Sciences Bielefeld
> Department of Engineering Sciences and Mathematics
> Computational Materials Science & Engineering (CMSE)
>
> Wilhelm-Bertelsmann-Str. 10, D-33602 Bielefeld
> Office: 202 (WBSII)
> Phone:  +49 521 106-71222
> Fax:    +49 521 106-71241
> Web:    www.christianbenjaminries.de
>
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