maemo.org - Talk - Using DBus QML interface

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Using DBus QML interface

I am trying to use the DBus QML interface
https://nemo-qml-plugin-dbus.readthedocs.io/en/latest/

to monitor the cellular signal levels etc, using these apis:
https://github.com/rilmodem/ofono/bl...etwork-api.txt
https://git.sailfishos.org/mer-core/...onitor-api.txt

I can get signals from ofono.NetworkRegistration OK, but I can't work out how to use "getProperty" and "call" .
In the example below in "function xx" they both return "undefined"

or how to connect to "servingCellInformationChanged" of the ofono.NetworkMonitorAgent, (which doesn't seem to have any signals.)

In this case

Code:

import QtQuick 2.0

import org.nemomobile.dbus 2.0



Item {

    id: dBusX

    property string cellName:""

    property string cellStatus: ""

    property int dBmStrength: 0

    property int rawStrength: 0

    property string technology: ""

    property int cellStrength: 0



    function xx(){

        var R=ooNR.getProperty('Status')

        console.log(R)

        R=ooNR.call('GetProperties',[])

        console.log(R)

        R=ooNM.call('GetServingCellInformation',[])

                console.log(R)



    }



    DBusInterface {

        id: ooNR

        bus:DBus.SystemBus

        service: 'org.ofono'

        path: '/ril_0'

        iface: 'org.ofono.NetworkRegistration'

        signalsEnabled: true



        function propertyChanged(name, value) {  //on signal...

            //console.log("NR Property Changed "+ name + "  " + value)

            switch (name) {

                case "Strength":

                    rawStrength = value

                    dBmStrength = (value-113)/2 //2 * value - 113;

                break;

                case "Name" : cellName = value; break;

                case "Technology" : technology = value; break;

                case "Status" : cellStatus = value; break;



                default: console.log("NR Property Changed "+ name + "  " + value)

            }

        }

    }

//----------

    DBusInterface {

        id: ooNM

        bus:DBus.SystemBus

        service: 'org.ofono'

        path: '/ril_0'

        iface: 'org.ofono.NetworkMonitor'

        signalsEnabled: true

    }

//--------------

    DBusInterface {

        id: ooNMA

        bus:DBus.SystemBus

        service: 'org.ofono'

        path: '/ril_0'

        iface: 'org.ofono.NetworkMonitorAgent'

        signalsEnabled: true



//        function servingCellInformationChanged(a) {

//            console.log(a)

//    }



// Error message when below runs is:

// TypeError: Property 'typedCallWithReturn' of object DeclarativeDBusInterface(0x10548530) is not a function

        Component.onCompleted: {

            ooNMA.typedCallWithReturn('ServingCellInformationChanged', [], function (result) {

                // This will be called when the result is available

                console.log('ServingCellInformationChanged: ' + result);

            });

        }

    }



}

Re: Using DBus QML interface

I realised that TypedCallWithReturn has been replaced by TypedCall.

So now I get error message:

Quote:

[W] unknown:60 - file:///usr/share/CellMon/qml/components/DBus.qml:60:5: QML DBusInterface: QDBusError("org.freedesktop.DBus.Error.UnknownMeth od", "Method \"ServingCellInformationChanged\" with signature \"\" on interface \"org.ofono.NetworkMonitorAgent\" doesn't exist\n")

Code:

Component.onCompleted: {

            ooNMA.typedCall('ServingCellInformationChanged',[],

               function (result) {                  console.log('ServingCellInformationChanged: ' + result);                    }             );

        }

I still don't know if "ServingCellInformationChanged" is to setup a callback , as above. OR is it supposed to be signal type function that will just be called if it is provided?

Re: Using DBus QML interface

for ofono you can use corresponding qml bindings insead of direct dbus calls

Re: Using DBus QML interface

Quote:

Originally Posted by coderus (Post 1572078)

for ofono you can use corresponding qml bindings insead of direct dbus calls

I found this: https://git.sailfishos.org/mer-core/...ugins.qmltypes

Do you have any idea if this is just calling the dbus, or does it directly access the ofono libs some other way?

I see NetworkMonitor doesn't appear to be in there, which I am using.

I have typedcalls working now, but I have not worked out a way to get callbacks/events/signals from NetworkMonitor, and I am left doing timer polling of getServingNetworkProperties.

There is a NetworkMonitorAgent , but does not seem to be in dbus on sfos. There is a call to RegisterAgent in NetworkMonitor, but I cannot see what to do with it.