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// Copyright (C) 2023 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
//![0]
import QtQuick
import QtQuick.Controls
ApplicationWindow {
width: 800
height: 600
visible: true
TreeView {
id: treeView
anchors.fill: parent
anchors.margins: 10
clip: true
selectionModel: ItemSelectionModel {}
// The model needs to be a QAbstractItemModel
// model: yourTreeModel
delegate: Item {
implicitWidth: padding + label.x + label.implicitWidth + padding
implicitHeight: label.implicitHeight * 1.5
readonly property real indentation: 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
required property int row
required property int column
required property bool current
// Rotate indicator when expanded by the user
// (requires TreeView to have a selectionModel)
property Animation indicatorAnimation: NumberAnimation {
target: indicator
property: "rotation"
from: expanded ? 0 : 90
to: expanded ? 90 : 0
duration: 100
easing.type: Easing.OutQuart
}
TableView.onPooled: indicatorAnimation.complete()
TableView.onReused: if (current) indicatorAnimation.start()
onExpandedChanged: indicator.rotation = expanded ? 90 : 0
Rectangle {
id: background
anchors.fill: parent
color: row === treeView.currentRow ? palette.highlight : "black"
opacity: (treeView.alternatingRows && row % 2 !== 0) ? 0.3 : 0.1
}
Label {
id: indicator
x: padding + (depth * indentation)
anchors.verticalCenter: parent.verticalCenter
visible: isTreeNode && hasChildren
text: "▶"
TapHandler {
onSingleTapped: {
let index = treeView.index(row, column)
treeView.selectionModel.setCurrentIndex(index, ItemSelectionModel.NoUpdate)
treeView.toggleExpanded(row)
}
}
}
Label {
id: label
x: padding + (isTreeNode ? (depth + 1) * indentation : 0)
anchors.verticalCenter: parent.verticalCenter
width: parent.width - padding - x
clip: true
text: model.display
}
}
}
}
//![0]
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