[nemo@Jolla ~]$ ls -l /opt/sdk/SailChatSailfish
ls: cannot access /opt/sdk/SailChatSailfish: No such file or directory

[SailChatSailfish.pro]
TARGET = SailChatSailfish

CONFIG += sailfishapp

SOURCES += src/SailChatSailfish.cpp

OTHER_FILES += qml/SailChatSailfish.qml \
    qml/cover/CoverPage.qml \
    qml/pages/FirstPage.qml \
    qml/pages/SecondPage.qml \
    rpm/SailChatSailfish.changes.in \
    rpm/SailChatSailfish.spec \
    rpm/SailChatSailfish.yaml \
    translations/*.ts \
    SailChatSailfish.desktop \
    qml/logic/client.js \
    qml/pages/client.js

CONFIG += sailfishapp_i18n
TRANSLATIONS += translations/SailChatSailfish-de.ts


[pages/Firstpage.qml]
import QtQuick 2.0
import Sailfish.Silica 1.0
import "../logic/client.js" as Client

Page {
    id: page
    property int messageID : -1


    ListView {
        id: listview
        anchors.top: parent.top
        anchors.bottom:  bar.top
        anchors.left : parent.left
        anchors.right: parent.right
        anchors.leftMargin: 10
        anchors.rightMargin: 10
        anchors.topMargin: 10
        anchors.bottomMargin: 10

        model: messages
        delegate: Label {
            text: from + ": " + message
        }
        clip: true
    }

    Item {
        id: bar
        height: textField.height
        anchors.left : parent.left
        anchors.right: parent.right
        anchors.bottom: parent.bottom
        TextField {
            Keys.onReturnPressed: {
                if(text.trim()!=="") {
                    Client.sendMessage(text ,messageID, messageSend)
                    text = "";
                }
            }
            id: textField
            anchors.fill: parent
        }
    }

    ListModel {
        id: messages
    }

    function messageSend(data) {
        for(var i=0; i<data.messages.length; i++) {
            messages.append(data.messages[i]);
        }
        listview.positionViewAtEnd()
        messageID = data.mID
    }
}