test

    spacing: 0

    property string selectedUuid: ""

    property var expandedUuids: ({})

    Layout.preferredHeight: Math.max(200, docTreeView.rows * 30 + 30)

    function reload() {

        /* No-op: model is updated automatically via beginResetModel/endResetModel */

    }

    function saveExpansionState() {

        var state = {}

        for (var row = 0; row < docTreeView.rows; ++row) {

            var idx = docTreeView.index(row, 0)

            if (docTreeView.isExpanded(row)) {

                var uid = docTreeView.model.data(idx, 258) // UuidRole = UserRole+2 = 258

                if (uid) state[uid] = true

            }

        }

        expandedUuids = state

    }

    function restoreExpansionState() {

        for (var row = 0; row < docTreeView.rows; ++row) {

            var idx = docTreeView.index(row, 0)

            var uid = docTreeView.model.data(idx, 258)

            if (uid && expandedUuids[uid]) {

                docTreeView.expand(row)

            }

        }

    }

    Connections {

        target: localApi.documentTreeModel()

        function onModelAboutToBeReset() {

            treeRoot.saveExpansionState()

        }

        function onModelReset() {

            Qt.callLater(treeRoot.restoreExpansionState)

        }

    }

    Label {

        visible: docTreeView.rows === 0

        text: qsTr("Empty document. Add a widget to start.")