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/****************************************************************************
**
** Copyright (C) 2022 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt Quick 3D.
**
** $QT_BEGIN_LICENSE:GPL$
** 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
import QtQml.Models
DelegateModel {
id: delegateModel
property var visibleGroup: visibleItems
property var lessThan: function(left, right) { return true }
property var filterAcceptsItem: function(item) { return true }
signal updated()
function update() {
if (delegateModel.items.count > 0) {
delegateModel.items.setGroups(0, delegateModel.items.count, "items")
}
// Filter items
var visible = []
for (var i = 0; i < delegateModel.items.count; ++i) {
var item = delegateModel.items.get(i)
if (delegateModel.filterAcceptsItem(item.model)) {
visible.push(item)
}
}
// Sort the list of visible items
visible.sort(function(a, b) {
return delegateModel.lessThan(a.model, b.model);
});
// Add all items to the visible group
for (i = 0; i < visible.length; ++i) {
item = visible[i]
item.inVisible = true
if (item.visibleIndex !== i) {
visibleItems.move(item.visibleIndex, i, 1)
}
}
delegateModel.updated()
}
items.onChanged: delegateModel.update()
onLessThanChanged: delegateModel.update()
onFilterAcceptsItemChanged: delegateModel.update()
groups: DelegateModelGroup {
id: visibleItems
name: "visible"
includeByDefault: false
}
filterOnGroup: "visible"
}
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