How to implement custom resize handlers for ApplicationWindow, correctly?

[adutzu89]

Hi all,

I have an application with Qt.FramelessWindowHint flag and I want to reimplement resize for it but I'm a bit stuck because the resizing has a haotic animation.

ResizeController.qml:

Item {
    id: root
    property int cursorShape: Qt.SizeHorCursor
    property int xResize: 0
    property int yResize: 0

    MouseArea {
        id: mouseArea
        anchors.fill: parent
        acceptedButtons: Qt.LeftButton
        cursorShape: root.cursorShape
        onPositionChanged: {
            xResize = mouse.x
            yResize = mouse.y
        }
    }
}

Usage:

ResizeController {
        anchors.bottom: parent.bottom
        anchors.right: parent.right
        width: 20
        height: width
        cursorShape: Qt.SizeFDiagCursor
        onXResizeChanged: window.width = window.width + xResize
        onYResizeChanged: window.height = window.height + yResize
    }

Any ideeas what I am doing wrong?
I'm using for building / testing: KDE Neon developer stable, 64 bit version.