How to change SystemPalette globally in linux

alex_jeff

in the following example, when I change my system theme in KDE plasma, the rectangle color changes since SystemPalette is changed (on runtime without restarting the application):

import QtQuick 2.15
import QtQuick.Window 2.15
Window {
    width: 640
    height: 480
    visible: true
    title: qsTr("Hello World")

    SystemPalette {
        id: palette
        colorGroup: SystemPalette.Active
    }

    Rectangle{
        anchors.centerIn: parent
        width: 200
        height: width

        color: palette.base

    }
}

it's not using any IPC mechanism, it's not watching any config files( like plasmarc or kdeglobals), and it's not using any KDE plugins or libraries, but still, it can understand changes in the color system.
how can I change SystemPalette globally so that it can be affected in all qt based applications without explicitly using the IPC mechanism or watching changes in settings files? (I'm familiar with XDG standards and tried to study KDE plasma source code, still can't understand how this can be done )
thanks.

alex_jeff

I'm still struggling with this, any help is appreciated.