Static Object Definition From QML

[carles.sole.grau]

Hi everybody,
I would like to know if it's possible to create a new "static" QML type from QML code. And then use its properties without having to instantiate that object.
For instance:
EnumerationCustomType.qml:

import QtQuick 2.0

QtObject {
    
    readonly property int one: 1
    readonly property int two: 2
    readonly property int three: 3
}

And then in main.qml:

import QtQuick 2.7
import QtQuick.Controls 2.0

ApplicationWindow {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")
    
    Label {
        anchors.centerIn: parent
        text: EnumerationCustomType.one
    }
}

This code does not work, this error is shown:

ReferenceError: EnumerationCustomType is not defined

P.S: I know that defining this object in main.qml it could be done:

import QtQuick 2.7
import QtQuick.Controls 2.0

ApplicationWindow {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")
    property var enumerationCustomType: EnumerationCustomType{}
    Label {
        anchors.centerIn: parent
        text: enumerationCustomType.one
    }
}

But I would like to do it without having to defining it.

Thank you very much

[A Former User]

Hi! You can use a singleton for that:

EnumerationCustomType.qml

import QtQuick 2.7

pragma Singleton

QtObject {
    readonly property int one: 1
    readonly property int two: 2
    readonly property int three: 3
}

qmldir

singleton EnumerationCustomType 1.0 EnumerationCustomType.qml

main.qml

import QtQuick 2.7
import QtQuick.Controls 2.0
import "."

ApplicationWindow {
    visible: true
    width: 640
    height: 480

    Column {
        Text { text: EnumerationCustomType.one }
        Text { text: EnumerationCustomType.two }
        Text { text: EnumerationCustomType.three }
    }

}

[carles.sole.grau]

@Wieland
Hi, in relation with this answer I would like to replace the

import "."

with something like

import MyComponents 1.0

I've found this documentation: http://doc.qt.io/qt-5/qtqml-modules-qmldir.html
Where it's said:

//Style.qml with custom singleton type definition
pragma Singleton
import QtQuick 2.0

QtObject {
    property int textSize: 20
    property color textColor: "green"
}

// qmldir declaring the singleton type
module CustomStyles
singleton Style 1.0 Style.qml

// singleton type in use
import QtQuick 2.0
import CustomStyles 1.0

Text {
    font.pixelSize: Style.textSize
    color: Style.textColor
    text: "Hello World"
}

So in my case I did:

//EnumerationCustomType.qml with custom singleton type definition
pragma Singleton
import QtQuick 2.7

QtObject {
    readonly property int one: 1
    readonly property int two: 2
    readonly property int three: 3
}

// qmldir declaring the singleton type
module MyComponents
singleton EnumerationCustomType 1.0 EnumerationCustomType.qml

// singleton type in use
import QtQuick 2.7
import QtQuick.Controls 2.0
import MyComponents 1.0

ApplicationWindow {
    visible: true
    width: 640
    height: 480

    Column {
        Text { text: EnumerationCustomType.one }
        Text { text: EnumerationCustomType.two }
        Text { text: EnumerationCustomType.three }
    }
}

But when I try to run the app it is said:

qrc:/main.qml:3 module "MyComponents" is not installed

So, do you know how to solve this?
I'm doing anything in a bad way?

Thank you very much