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//![0]
import QtQuick

Window {
    width: 600
    height: 400
    visible: true

    TreeView {
        anchors.fill: parent
        // The model needs to be a QAbstractItemModel
        // model: yourTreeModel

        delegate: Item {
            id: root

            implicitWidth: padding + label.x + label.implicitWidth + padding
            implicitHeight: label.implicitHeight * 1.5

            readonly property real indent: 20
            readonly property real padding: 5

            // Assigned to by TreeView:
            required property TreeView treeView
            required property bool isTreeNode
            required property bool expanded
            required property int hasChildren
            required property int depth

            TapHandler {
                onTapped: treeView.toggleExpanded(row)
            }

            Text {
                id: indicator
                visible: root.isTreeNode && root.hasChildren
                x: padding + (root.depth * root.indent)
                text: root.expanded ? "▼" : "▶"
            }

            Text {
                id: label
                x: padding + (root.isTreeNode ? (root.depth + 1) * root.indent : 0)
                width: root.width - root.padding - x
                clip: true
                text: model.display
            }
        }
    }
}
//![0]