Service Framework using QML Example

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 import QtQuick 2.0
 import QtServiceFramework 5.0
 import "content"

 //Layout of the mainPage
 //----------------------------------------------  ____ mainPage
 //| ------------------- ---------------------- | /
 //| | dialerList      | | dialScreen         | |/
 //| |                 | |                    | |
 //| |                 | |                    | |
 //| |                 | |                    | |
 //| ------------------- |                    | |
 //| ------------------- |                    | |
 //| | serviceDetails  | |                    | |
 //| ------------------- |                    | |
 //|                     |                    | |
 //|                     |                    | |
 //|                     |                    | |
 //|                     |                    | |
 //| ------------------- |                    | |
 //| | status          | |                    | |
 //| ------------------- ---------------------- |
 //----------------------------------------------

 Rectangle {
     id: mainPage
     color: "white"

     property QtObject dialerObject

     width: 320
     height: 460
     y: 20

     DialerList {
         id: dialerList
         height: 240
         width: childrenRect.width-5
         anchors.top: dialScreen.bottom
         anchors.left: parent.left
         anchors.topMargin: 5
         anchors.leftMargin: 5
         anchors.rightMargin: 5
         radius: 5
         color: "steelblue"
         border.color: "black"
         border.width: 3
         gradient:
             Gradient {
                 GradientStop {
                     position: 0.0
                     color: "lightsteelblue"
                 }

                 GradientStop {
                     position: 1.0
                     color: "steelblue"
                 }
             }
         onSignalSelected: { serviceSelected(); }
     }

     function serviceSelected()
     {
         dialerObject = dialerList.dialService.serviceObject
         serviceDetails.text = "Selected dial service:" + "\n   " +
                                dialerList.dialService.serviceDescriptor.serviceName +
                                " (" + dialerList.dialService.serviceDescriptor.majorVersion +
                                "." + dialerList.dialService.serviceDescriptor.minorVersion + ")";
     }

     Text {
         id: serviceDetails
         text: "Service:"
         width: parent.width
         anchors.topMargin: 5
         anchors.leftMargin: 5
         anchors.rightMargin: 5;
         anchors.left: parent.left
         anchors.top: dialerList.bottom
         wrapMode: "WrapAtWordBoundaryOrAnywhere"
     }

     Text {
         id: status
         width:  parent.width - dialScreen.width
         height: dialScreen.height
         anchors.top:  parent.top
         anchors.left: dialScreen.right
         anchors.leftMargin: 5
         wrapMode: "Wrap"
     }

     Timer {
         id: clearStatusTimer
         interval: 2000
         running: false
         repeat: false
         onTriggered: {
             status.text = ""
         }
     }

     DialScreen {
         id: dialScreen
         property bool activeCall : false
         property variant currentDialer: 0;
         anchors.topMargin: 5
         anchors.leftMargin: 5
         anchors.rightMargin: 5
         anchors.left: parent.left
         anchors.top: parent.top
         onDial: {
             if (activeCall === false) {
                 if (dialerObject != 0) {
                     dialerList.allowselction = false;
                     var o = dialerObject;
                     status.text = "Dialing " + numberToDial + "...";
                     dialScreen.currentDialer = o;
                     o.dialNumber(numberToDial);
                     activeCall = true;

                 }
             }
         }
         onHangup: {
             if (activeCall === true) {
                 if (dialScreen.currentDialer != 0) {
                     dialScreen.currentDialer.hangup();
                 }
                 dialerList.allowselction = true;
                 status.text = "Hang up";
             }
         }
     }

     ServiceLoader {
         id: defaultService
         interfaceName: "com.nokia.qt.examples.Dialer"

         onStatusChanged: {
             if (status == Service.Ready) {
                 //Note that an alias property would also work
                 dialerObject = defaultService.serviceObject;
                 serviceDetails.text = "Default dial service:" + "\n   " +
                                        defaultService.serviceName +
                                        " (" + defaultService.majorVersion +
                                        "." + defaultService.minorVersion + ")";
             } else if (status == Service.Error) {
                 console.log("Got IPC error from SFW " + errorString);
                 dialScreen.activeCall = false;
                 status.text = "";
                 serviceDetails.text = errorString;
                 dialerList.allowselction = true;
             }
         }
     }

 //    ! [1]
     Connections {
         target: dialerObject
         ignoreUnknownSignals: true

         onStateChanged: {
             if (dialScreen.currentDialer.state == 1) {
                 status.text += "\nRinging";
             }
             else if (dialScreen.currentDialer.state == 2) {
                 status.text += "\nConnected";
             }
             else if (dialScreen.currentDialer.state == 0) {
                 status.text += "\nConnection terminated";
                 dialScreen.activeCall = false;
                 clearStatusTimer.running = true;
             }
             else if (dialScreen.currentDialer.state == 3) {
                 status.text += "\nPhone already engaged";
             }
         }
     }
 }