How to update QApplicationWindow when hidden?

[Eventh]

I'm experiencing a weird issue when I'm hiding and showing qml windows. I want to update the layout before I show it again but it shows the old state/data for a split second before updating and showing the new data. Like if I press a button and hide it within that buttons onClick handler, when I show the window it will show the buttons pressed animation finishing from where it left off when it was hidden.

Is there any way to force updates on a hidden window? Or some workaround I can use? Thanks.

I've tried the requestUpdate function and then qApp->processEvents(), but it doesn't seem to do anything.

[ODБOï]

@Eventh hi,
I don't have this behavior with qml Button type, nor with custom button (Rectangle with Mousearea ..)
QtQuick 2.5
QtQuick.Window 2.2
QtQuick.Controls 2.2
How do you hide the window ?
all this work for me : show(), hide() setVisible(bool), close(), opacity=x ?
Maybe show the structure, how the window is created ?

import QtQuick 2.5
import QtQuick.Window 2.2
import QtQuick.Controls 2.2

Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Hello World")
    Button{
        id:showBtn
        onClicked:w.show() //w.setVisible(true)
    }
    Window{
        id:w
        visible: true
        width: 300
        height: 300
       Rectangle{
           id:btn
           scale: ms.pressed?0.7:1
           anchors.centerIn:parent
           height:showBtn.implicitHeight
           width:showBtn.implicitWidth
           color: "olive"
           Behavior on scale{NumberAnimation{duration: 50}}
            MouseArea{
                id:ms
                anchors.fill: parent
                onClicked:w.close()//w.opacity=0//w.hide()//w.setVisible(false)
            }
       }
    }
}