How to parse QML file from QT C++

[AbinaThomas]

Hi,

I'm working in the back end of QML file. I wand to send some signals to QML. So I need to parse the QML file and find out which signals are handled in the QML file. Is there any way to parse a QML file from QT c++??

Thanks in advance...

[spirit]

Well, you can do this in other way, without parsing anything: you can traverse QML objects from C++ and check objects' metainfo.
You'll need to make a loop by QMetaMethod (using QMetaObject::methodCount and QMetaObject::method) and check if the current method is a signal (using QMetaMethod::methodType).

[AbinaThomas]

Thank you very much for your replay. "QMetaObject" and "QMetaMethod" are new terms for me. I will refer its tutorial.

[AbinaThomas]

I tried with QMetaObject. My sample code is

QDeclarativeView *view = new QDeclarativeView();
    view->setSource(QUrl::fromLocalFile("base.qml"));
    Qmlview = view;
     QObject *item =  view->rootObject();
     for(int i=0; i<item->metaObject()->methodCount(); i++)
         {
             QMetaMethod meta = item->metaObject()->method( i );
             if( meta.methodType() == QMetaMethod::Slot )
                   qDebug() << meta.signature();
         }
    Qmlview->show();

QDeclarativeView *view = new QDeclarativeView();
    view->setSource(QUrl::fromLocalFile("base.qml"));
    Qmlview = view;
     QObject *item =  view->rootObject();
     for(int i=0; i<item->metaObject()->methodCount(); i++)
         {
             QMetaMethod meta = item->metaObject()->method( i );
             if( meta.methodType() == QMetaMethod::Slot )
                   qDebug() << meta.signature();
         }
    Qmlview->show();

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but I'm not getting the expected output.
My Output is :
deleteLater()
_q_reregisterTimers(void*)
updateMicroFocus()
doUpdate()

My QML file is :

import QtQuick 1.1
import File 1.1
 
Rectangle {
    width: 400
    height: 400
    color: "#d5b9b9"
TextUpdate
{
    id : linkFile
}
Connections
{
    target: linkFile
    onUpdateBaseQml:
    {
        console.log("Got event")
        timeText.text = time
        speedText.text = speed
        rpmText.text = rpm
        fuelText.text = fuel
    }
}

import QtQuick 1.1
import File 1.1

Rectangle {
    width: 400
    height: 400
    color: "#d5b9b9"
TextUpdate
{
    id : linkFile
}
Connections
{
    target: linkFile
    onUpdateBaseQml:
    {
        console.log("Got event")
        timeText.text = time
        speedText.text = speed
        rpmText.text = rpm
        fuelText.text = fuel
    }
}

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How i get the "onUpdateBaseQml" slot function only?

[spirit]

You need to iterate by children of the root object. In you example you are only iterating by root itself.
EDITED: And you need signals not slots, no?

[AbinaThomas]

How to iterate by children of the root object? Do you have any sample code??

I want the slots which are defied in the QML file.
If I send a signal named "updateBaseQml" from CPP then its SLOT in QML is "onUpdateBaseQml". an i right?
I want that function name like "onUpdateBaseQml".

thanks in advance.

[spirit]

That's what you wrote

...So I need to parse the QML file and find out which signals are handled in the QML file....

Anyway, use QObject::children to get a list of children for a given object.