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Diffstat (limited to 'examples/TransitionItem/imports/TransitionView/TransitionList.qml')
-rw-r--r-- | examples/TransitionItem/imports/TransitionView/TransitionList.qml | 101 |
1 files changed, 101 insertions, 0 deletions
diff --git a/examples/TransitionItem/imports/TransitionView/TransitionList.qml b/examples/TransitionItem/imports/TransitionView/TransitionList.qml new file mode 100644 index 0000000..4e617c7 --- /dev/null +++ b/examples/TransitionItem/imports/TransitionView/TransitionList.qml @@ -0,0 +1,101 @@ +/**************************************************************************** +** +** 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] + } +} |