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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
import QtQuick
import QtQuick.Window
import QtQuick.Controls
import TestModel
ApplicationWindow {
width: 800
height: 600
visible: true
property alias treeView: treeView
property var selectedIndex: undefined
UICallback { id: callback }
Item {
anchors.fill: parent
anchors.margins: 10
Column {
id: leftMenu
width: childrenRect.width
anchors.left: parent.left
anchors.top: parent.top
anchors.bottom: parent.bottom
CheckBox {
id: useCustomDelegate
text: "Use custom delegate"
}
CheckBox {
id: useFileSystemModel
text: "Use file system model"
}
Button {
text: "Show QTreeView"
onClicked: callback.showQTreeView(treeView.model)
}
Button {
text: "Insert row"
onClicked: {
let index = treeView.modelIndex(1, 0)
treeView.model.insertRows(index.row, 1, index.parent);
}
}
Button {
text: "Remove row"
onClicked: {
let index = treeView.modelIndex(1, 0)
treeView.model.removeRows(index.row, 1, index.parent);
}
}
Button {
text: "Expand to"
enabled: selectedIndex != undefined
onClicked: {
treeView.expandToIndex(selectedIndex);
treeView.forceLayout()
let row = treeView.rowAtIndex(selectedIndex)
treeView.positionViewAtRow(row, Qt.AlignVCenter)
}
}
}
TreeView {
id: treeView
width: parent.width
anchors.left: leftMenu.right
anchors.right: parent.right
anchors.top: parent.top
anchors.bottom: parent.bottom
anchors.leftMargin: 100
anchors.topMargin: 100
clip: true
selectionModel: ItemSelectionModel {}
model: useFileSystemModel.checked ? fileSystemModel : testModel
delegate: useCustomDelegate.checked ? customDelegate : treeViewDelegate
}
}
TestModel {
id: testModel
}
Component {
id: treeViewDelegate
TreeViewDelegate {
TapHandler {
acceptedModifiers: Qt.ControlModifier
onTapped: {
if (treeView.isExpanded(row))
treeView.collapseRecursively(row)
else
treeView.expandRecursively(row)
}
}
TapHandler {
acceptedModifiers: Qt.ShiftModifier
onTapped: selectedIndex = treeView.modelIndex(row, 0)
}
Rectangle {
anchors.fill: parent
border.color: "red"
border.width: 1
visible: treeView.modelIndex(row, column) === selectedIndex
}
}
}
Component {
id: customDelegate
Item {
id: root
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
TapHandler {
onTapped: treeView.toggleExpanded(row)
}
Text {
id: indicator
visible: root.isTreeNode && root.hasChildren
x: padding + (root.depth * root.indentation)
text: root.expanded ? "▼" : "▶"
}
Text {
id: label
x: padding + (root.isTreeNode ? (root.depth + 1) * root.indentation : 0)
width: root.width - root.padding - x
clip: true
text: model.display
}
}
}
}
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