MenuButton.qml

import QtQuick 2.10
import QtQuick.Controls 2.3
import de.skycoder42.QtMvvm.Quick 1.0

ActionButton {
    id: _menuButton
    icon.name: "view-more-symbolic"
    icon.source: "qrc:/de/skycoder42/qtmvvm/quick/icons/ic_more_vert.svg"
    text: qsTr("More…")
    checkable: true
    checked: _moreMenu.visible

    readonly property alias moreMenu: _moreMenu
    default property alias menuContent: _moreMenu.contentData

    MouseArea { //used to catch mouse events to prevent flickering
        visible: _moreMenu.visible
        anchors.fill: parent
    }

    Menu {
        id: _moreMenu
        visible: _menuButton.checked
    }

    Component.onCompleted: {
        if(QuickPresenter.currentStyle !== "Material") {
            _moreMenu.y = Qt.binding(function(){
                return _menuButton.height + Math.max(0, (parent.height - _menuButton.height)/2);
            });
        } else {
            _moreMenu.y = Qt.binding(function(){
                return Math.min(0, (_menuButton.height - parent.height)/2);
            });
        }
    }
}