QML - main window position on start (screen center)

Question

How I can do following: I’d like show my main window on start on the center screen.

Answer 1

If using QtQuick, it's possible to do that:

import QtQuick 2.2
import QtQuick.Controls 1.1
import QtQuick.Window 2.0

ApplicationWindow {
    visible: true
    width: 320
    height: 480
    Component.onCompleted: {
        // Commenting this to use properties instead of setters
        //setX(Screen.width / 2 - width / 2);
        //setY(Screen.height / 2 - height / 2);
        x = Screen.width / 2 - width / 2
        y = Screen.height / 2 - height / 2
    }
}

Answer 2

Dielson's answer is much better, especially since widgets weren't mentioned... anyway, here's an even simpler version of his answer:

import QtQuick 2.0
import QtQuick.Window 2.0

Window {
    visible: true
    x: Screen.width / 2 - width / 2
    y: Screen.height / 2 - height / 2
    width: 320
    height: 480
}

---

As mentioned by Alexander, this binding can result in weird resizing behaviour. Because of that, it's better to use Dielson's answer. The only thing I'd mention is that it's not common to use setters in QML; some systems (I believe they're called property interceptors) even rely on properties being set to perform animations, for example. So the more common approach is as follows:

import QtQuick 2.0
import QtQuick.Window 2.0

Window {
    visible: true
    width: 320
    height: 480

    Component.onCompleted: {
        x = Screen.width / 2 - width / 2
        y = Screen.height / 2 - height / 2
    }
}