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/****************************************************************************
**
** Copyright (C) 2018 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Quick Designer Components.
**
** $QT_BEGIN_LICENSE:GPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) any later version
** approved by the KDE Free Qt Foundation. The licenses are as published by
** the Free Software Foundation and appearing in the file LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/
import QtQuick 2.12
QtObject {
id: list
property Item intialItem
//has next prev and most likely currentIndex, count
property var items
property Item nextItem
property Item prevItem
property Item currentItem
onCurrentItemChanged: {
var currentIndex = list.__indexForCurrentItem()
if (currentIndex < (list.items.length - 1))
list.nextItem = list.items[currentIndex + 1]
if (currentIndex > 0)
list.prevItem = list.items[currentIndex - 1]
}
function __indexForCurrentItem() {
var currentIndex = -1
for (var i = 0; i < list.items.length; ++i) {
var item = list.items[i]
if (item === list.currentItem)
currentIndex = i
}
return currentIndex
}
property int length: items.length
function next() {
var currentIndex = list.__indexForCurrentItem()
list.nextItem = null
if (currentIndex > -1 && (currentIndex < list.items.length - 1)) {
list.prevItem = list.items[currentIndex]
list.currentItem = list.items[currentIndex + 1]
if (currentIndex + 2 < list.items.length)
list.nextItem = list.items[currentIndex + 2]
}
}
function prev() {
var currentIndex = list.__indexForCurrentItem()
list.prevItem = null
if (currentIndex > 0 && currentIndex < (list.items.length)) {
if (currentIndex - 2 >= 0)
list.prevItem = list.items[currentIndex - 2]
list.currentItem = list.items[currentIndex - 1]
list.nextItem = list.items[currentIndex]
}
}
Component.onCompleted: {
list.currentItem = list.intialItem
var currentIndex = list.__indexForCurrentItem()
if (currentIndex < (list.items.length - 1))
list.nextItem = list.items[currentIndex + 1]
if (currentIndex > 0)
list.prevItem = list.items[currentIndex - 1]
}
}
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