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/usr/lib/x86_64-linux-gnu/qt5/qml/Ubuntu/Settings/Menus/CheckableMenu.qml is in qtdeclarative5-ubuntu-settings-components 0.7+16.04.20160321.1-0ubuntu1.

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/*
 * Copyright 2013 Canonical Ltd.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; version 3.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 * Authors:
 *      Nick Dedekind <nick.dedekind@canonical.com>
 */

import QtQuick 2.4
import Ubuntu.Components 1.3 as Components
import Ubuntu.Components.ListItems 1.3 as ListItem

ListItem.Empty {
    id: menu

    property alias text: label.text
    property bool checked: false

    onClicked: menu.checked = !menu.checked

    Components.CheckBox {
        id: checkbox
        objectName: "checkbox"
        property bool enableCheckConnection: true

        anchors {
            left: parent.left
            leftMargin: menu.__contentsMargins
            verticalCenter: parent.verticalCenter
        }

        Component.onCompleted: {
            checked = menu.checked;
        }

        // FIXME : create a bi-directional feedback component
        onCheckedChanged: {
            if (!enableCheckConnection) {
                return;
            }
            var oldEnable = enableCheckConnection;
            enableCheckConnection = false;

            menu.checked = checked;
            menu.triggered(menu.checked);

            enableCheckConnection = oldEnable;
        }

        Connections {
            target: menu
            onCheckedChanged: {
                if (!checkbox.enableCheckConnection) {
                    return;
                }
                var oldEnable = checkbox.enableCheckConnection;
                checkbox.enableCheckConnection = false;

                checkbox.checked = menu.checked;

                checkbox.enableCheckConnection = oldEnable;
            }
        }
    }

    Components.Label {
        id: label
        anchors {
            left: checkbox.right
            leftMargin: menu.__contentsMargins
            right: parent.right
            rightMargin: menu.__contentsMargins
            verticalCenter: parent.verticalCenter
        }
        elide: Text.ElideRight
    }
}