How to put multiple singletons in one qmldir file? - qt

Question

I want to use multiple singletons in one qmldir file but it doesn't seem to work, I don't have an error but the program doesn't launch.
qmldir:
singleton File1 1.0 File.qml
singleton File2 1.0 File2.qml
main:
import QtQuick 2.7
import QtQuick.Controls 2.1
Window {
visible: true
width: 640
height: 480
title: qstr("hello world!")
Button {
onCliked: File2.test();
}
}
File2.qml:
pragma Singleton
import QtQuick 2.7
Item {
signal test;
onTest: console.log("File2 received signal");
}
File1.qml:
pragma Singleton
import QtQuick 2.7
Item {
signal test;
onTest: console.log("File1 received signal");
}
The code works if I delete the second line in qmldir, but then File2 will be undefined.

Answer 1

If your qmldir file is exactly as you have written:
Singleton File1 1.0 File.qml
Singleton File2 1.0 File2.qml
The error might reside within that, as the keyword is singleton, not Singleton.
Try that:
singleton File1 1.0 File.qml
singleton File2 1.0 File2.qml
But that error should not fail silently. There should be some errors:
[main.qml] a component declaration requires two or three arguments, but 4 were provided
[qmldir] a component declaration requires two or three arguments, but 4 were provided
main.qml:
import QtQuick 2.7
import QtQuick.Controls 2.0
import '.'
ApplicationWindow {
id: window
width: 800
height: 600
visible: true
Row {
spacing: 3
Button {
text: 'single1'
onClicked: Single.sig()
}
Button {
text: 'signle2'
onClicked: Single2.sig()
}
}
}
singleton.qml
pragma Singleton
import QtQuick 2.0
QtObject {
signal sig
onSig: console.log('Singleton1 Received')
}
singleton2.qml
pragma Singleton
import QtQuick 2.0
QtObject {
signal sig
onSig: console.log('Singelton2 Received')
}
qmldir
singleton Single 1.0 singleton.qml
singleton Single2 1.0 singleton2.qml
Works like a charm.