import QtQuick 1.0
import org.maemo.fremantle 1.0

Page
{
    id: mainPage
    tools: toolbar
    Column
    {

        signal tracksrcChanged(bool state)
        width: parent.width
        CheckBox
        {
            id: tracksrc
            text: "Select track from library" // label isn't needed with PageStackWindow
            checked: true
            //checkable: true

            onClicked:
            {
               mainPage.tracksrcChanged(checked)
            }
        }

        Label
        {
            id: selecttracklabel
            text: "Selected track"
        }
        Button
        {
            id: selecttrack
            text: "No track selected"
            checkable: false
            width: screenwidth
            onClicked:
            {
                console.log("Select track button clicked")
                pageStack.push(Qt.resolvedUrl("SelectTrackPage.qml"))
            }
            onTracksrcChanged:
            {
                ( state == true ) ? this.show()  :this.hide()
            }
        }
        Button
        {
            id: lyricssrcbutton
            text: lyricssrcdialog.model.get(lyricssrcdialog.selectedIndex).name
            width: screenwidth
            onClicked: { lyricssrcdialog.open(); }
        }

        Button
        {
            id: go
            text: "Go!"
            width: screenwidth
            onClicked:
            {
               console.log("Go! button clicked")
               pageStack.push(Qt.resolvedUrl("ShowLyricsPage.qml"))
            }
        }
    }
    SelectionDialog
    {
        id: lyricssrcdialog
        titleText: "Download source"
        selectedIndex: 0
        model: ListModel
        {
            ListElement { name: "AZLyrics" }
        }
    }
    OKDialog
    {
        id: notimplementeddialog
        message: "Sorry, not implemented yet!"
    }
}

 .../MainPage.qml:42:13: Cannot assign to non-existent property onTracksrcChanged:

Button {
id: selecttrack
onTracksrcChanged { ...
}

Button
        {
            id: selecttrack
            text: "No track selected"
            checkable: false
            width: screenwidth
            visible:tracksrc.checked
            onClicked:
            {
                console.log("Select track button clicked")
                pageStack.push(Qt.resolvedUrl("SelectTrackPage.qml"))
            }
}

typedef QString lyricsDownloaderString;

class lyricsDownloader : public QObject
{
public:
    Q_INVOKABLE virtual short perform() = 0;
    Q_INVOKABLE inline void setData(const string & a, const string & t); // set artist and track
 // some other data

protected:
    lyricsDownloader(const string & a, const string & t ) : artist(a), track(t) {} 
  /*other data*/
};

class AZLyricsDownloader : public lyricsDownloader
{
public:
    AZLyricsDownloader() : lyricsDownloader("", "") {}
    AZLyricsDownloader(const string & a, const string & t) : lyricsDownloader(a, t) {}
    Q_INVOKABLE short perform();
    Q_INVOKABLE inline void setData(const string & a, const string & t);// set artist and track
 /*other data*/

Q_DECL_EXPORT int main(int argc, char *argv[])
{
        QApplication app(argc, argv);

        mainWindow viewer;

        qmlRegisterUncreatableType<lyricsDownloader>("MaeLyrica", 1, 0, "lyricsDownloader", "");
        qmlRegisterType<AZLyricsDownloader>("MaeLyrica", 1, 0, "AZLyricsDownloader");
        viewer.setOrientation(QmlApplicationViewer::ScreenOrientationAuto);
        viewer.setMainQmlFile(QLatin1String("qml/maelyrica/main.qml"));
        viewer.showFullScreen();

        return app.exec();
}

import QtQuick 1.1
import com.nokia.meego 1.0
import com.nokia.extras 1.0
import MaeLyrica 1.0

//property color fontcolor: "white"

PageStackWindow
{
    id: pagestackwindow
    visible: true
    MainPage
    {
        id: mainview
    }
    initialPage: mainview
    AZLyricsDownloader
    {
        id: azdownloader
    }
}

import QtQuick 1.1
import com.nokia.meego 1.0

Page
{
 /*some gui elements*/

        Button
        {
            id: go
            text: "Go!"
            width: parent.width
            onClicked:
            {
                goLoader.source = "ShowLyricsPage.qml"
                pageStack.push(goLoader.item)
                azdownloader.perform()
                showLyricsPage.busyind.visible = false
            }
        }
    }
/*dialogs and toolbar definitions*/
}

import QtQuick 1.1
import com.nokia.meego 1.0

Sheet {
    id: sheet

    acceptButtonText: "Save"
    rejectButtonText: "Cancel"
    onAccepted:
    {
        if ( artistfield.text == "" || trackfield.text == "" ) // check whether empty
        {
            emptyfieldsdialog.open()
        }
        else
        {
            selecttrack.text = artistfield.text + " - " + trackfield.text
            azdownloader.setData(artistfield.text, trackfield.text)
        }
    }

    content: Rectangle { /*some content here*/ }

    /*dialog definition*/

TypeError: Result of expression 'azdownloader.setData' is not a function
TypeError: Result of expression 'azdownloader.perform' is not a function