appstudio-nmeasource-sample.qml

appstudio-nmeasource-sample.qml

import QtQuick 2.7
import QtQuick.Layouts 1.3
import QtQuick.Controls 2.1
import ArcGIS.AppFramework.Devices 1.0
import ArcGIS.AppFramework.Positioning 1.0

Item {
    property DeviceListModel deviceListModel: discoveryAgent.devices
    property Device currentDevice

    ColumnLayout {
        anchors.fill: parent
        anchors.margins: 10

        ComboBox {
            id: comboBox
            Layout.fillWidth: true
            model: deviceListModel
            textRole: "name"
            onCurrentTextChanged: selectDevice(deviceListModel.get(currentIndex))
        }

        ListView {
            Layout.fillWidth: true
            Layout.fillHeight: true
            model: messagesListModel
            delegate: Text { text: msg }
        }
    }

    DeviceDiscoveryAgent {
        id: discoveryAgent
    }

    NmeaSource {
        id: nmeaSource
        onReceivedNmeaData: log(nmeaSource.receivedSentence.trim())
    }

    PositionSource {
        id: positionSource
        active: false
        nmeaSource: nmeaSource
    }

    ListModel {
        id: messagesListModel
    }

    Connections {
        target: deviceListModel
        onCountChanged: if (comboBox.currentIndex == -1 && deviceListModel.count > 0) { comboBox.currentIndex = 0; }
    }

    function selectDevice(device) {
        positionSource.active = false;
        currentDevice = device;
        nmeaSource.source = currentDevice;
        messagesListModel.clear();
        JSON.stringify(currentDevice, undefined, 2).split("\n").forEach(log);
        positionSource.active = true;
    }

    function log(txt) {
        console.log(txt);
        messagesListModel.append( { msg: txt } );
        if (messagesListModel.count > 20) { messagesListModel.remove(0); }
    }

    Component.onCompleted: discoveryAgent.start()
}