How to minize/hide app with QML?

[tlaukkanen]

Is it possible to minimize or hide application with QML so that it would e.g. display task switcher on N900? Qt object seems to only contain method for quitting?

[YetAnotherNick]

You can expose your top-level window to QML:

@MainWindow::MainWindow()
{
...
QDeclarativeView *view = new QDeclarativeView(this);
view->context()->setContextProperty("mainWindow", this);
...
}@

And then from QML, for example:

@MouseArea {
onClicked: mainWindow.showMinimized()
}@

[tlaukkanen]

Thanks for a quick response. Any easy method to do this in Qt Quick Application where QmlApplicationViewer code is generated automatically?

[tlaukkanen]

I was able to add this to QmlApplicationViewer constructor:
@
engine()->rootContext()->setContextProperty("mainWindow", this);
@
...but when I call either mainWindow.hide() or mainWindow.showMinimized() in QML then the application quits and doesn't go in to background as expected on N900.

[jkosonen]

@
DBusConnection c = QDBusConnection::sessionBus();
QDBusMessage m = QDBusMessage::createSignal("/", "com.nokia.hildon_desktop", "exit_app_view");
c.send(m);
@

This did the trick for me!

[DJ]

Hi jkosonen,

What about MeeGo? What will be the DBus interface and the name.--

Thanks,
Jagadish D

[billouparis]

For generated QmlApplicationViewer, try something like this:

@int main(int argc, char *argv[])
{
QApplication app(argc, argv);
QmlApplicationViewer viewer;

/* publish viewer class to QML */
viewer.rootContext()->setContextProperty("QmlApplicationViewer", (QObject *)&viewer);

viewer.setMainQmlFile(QLatin1String("qml/CurrentAppli/main.qml"));
viewer.showExpanded();

return app.exec();

}
@

And then in your QML file:

@
import QtQuick 1.0

Rectangle {
id:screen

...
onSomeEvent {
       QmlApplicationViewer.hide();
}
...
onSomeEvent {
       QmlApplicationViewer.show()
}
 ...

}

@

let me know if this is working for you.
Bill

[lilian.moraru]

billouparis, it worked for me, thanks!
I had to add <QDeclarativeContext> for it to work.
Also, it doesn't give good code completion :(
But it works...

I used QmlApplicationViewer.showMinimized(); //because hide() - hides it in the processes