Warning, /frameworks/kitemmodels/tests/proxymodeltestapp/tree.qml is written in an unsupported language. File is not indexed.

  /*
     SPDX-FileCopyrightText: 2020 Marco Martin <mart@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 import QtQuick 2.6
 import QtQuick.Layouts 1.4
 import QtQuick.Controls 2.2 as QQC2
 import org.kde.kirigami 2.13 as Kirigami
 import org.kde.kitemmodels 1.0 
 import org.kde.qqc2desktopstyle.private 1.0 as StylePrivate
 
 
 QQC2.ScrollView {
     id: root
     width: 600
     height: 500
 
     ListView {
         spacing: 0
         clip: true
         add: Transition {
             NumberAnimation {
                 property: "opacity"; from: 0; to: 1; duration: 250 }
         }
         addDisplaced: Transition {
             NumberAnimation { properties: "y"; duration: 250 }
         }
         remove: Transition {
             NumberAnimation {
                 property: "opacity"; from: 1; to: 0; duration: 250 }
         }
         removeDisplaced: Transition {
             NumberAnimation { properties: "y"; duration: 250 }
         }
         model: KDescendantsProxyModel {
             id: descendantsModel
             expandsByDefault: false
             model: _model
         }
 
         delegate: Kirigami.AbstractListItem {
             id: delegate
             highlighted: false
             separatorVisible: false
 
             contentItem: RowLayout {
             RowLayout {
                     Layout.topMargin: -delegate.topPadding
                     Layout.bottomMargin: -delegate.bottomPadding
                     Repeater {
                         
                         model: kDescendantLevel-1
                         
                         delegate: StylePrivate.StyleItem {
                             Layout.preferredWidth: controlRoot.width//Kirigami.Units.gridUnit
                             Layout.fillHeight: true
                             visible: true
                         // control: controlRoot
                             elementType: "itembranchindicator"
                             properties: {
                                 "isItem": false,
                                 "hasSibling": kDescendantHasSiblings[modelData]
                             }
                         }
                     }
                     QQC2.Button {
                         id: controlRoot
                         Layout.preferredWidth: background.pixelMetric("treeviewindentation")
                         Layout.fillHeight: true
                         enabled: model.kDescendantExpandable
                         text: model.kDescendantExpanded ? "-" : "+"
                         onClicked: descendantsModel.toggleChildren(index)
                         background: StylePrivate.StyleItem {
                             id: styleitem
                             control: controlRoot
                             hover: controlRoot.hovered
                             elementType: "itembranchindicator"
                             on: model.kDescendantExpanded 
                             properties: {
                                 "isItem": true,
                                 "hasChildren": model.kDescendantExpandable,
                                 "hasSibling": model.kDescendantHasSiblings[model.kDescendantHasSiblings.length - 1]
                             }
                         }
                     }
             }
                 
                 QQC2.Label {
                     Layout.fillWidth: true
                     text: model.display
                 }
             }
         }
     }
 }