qt-everywhere-src-5.15.1/qtdeclarative/examples/quick/views/listview/sections.qml

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// This example shows how a ListView can be separated into sections using
// the ListView.section attached property.

import QtQuick 2.0
import "content"

Rectangle {
    id: container
    width: 300
    height: 360

    ListModel {
        id: animalsModel
        ListElement { name: "Ant"; size: "Tiny" }
        ListElement { name: "Flea"; size: "Tiny" }
        ListElement { name: "Parrot"; size: "Small" }
        ListElement { name: "Guinea pig"; size: "Small" }
        ListElement { name: "Rat"; size: "Small" }
        ListElement { name: "Butterfly"; size: "Small" }
        ListElement { name: "Dog"; size: "Medium" }
        ListElement { name: "Cat"; size: "Medium" }
        ListElement { name: "Pony"; size: "Medium" }
        ListElement { name: "Koala"; size: "Medium" }
        ListElement { name: "Horse"; size: "Large" }
        ListElement { name: "Tiger"; size: "Large" }
        ListElement { name: "Giraffe"; size: "Large" }
        ListElement { name: "Elephant"; size: "Huge" }
        ListElement { name: "Whale"; size: "Huge" }
    }

//! [0]
    // The delegate for each section header
    Component {
        id: sectionHeading
        Rectangle {
            width: container.width
            height: childrenRect.height
            color: "lightsteelblue"

            required property string section

            Text {
                text: parent.section
                font.bold: true
                font.pixelSize: 20
            }
        }
    }

    ListView {
        id: view
        anchors.top: parent.top
        anchors.bottom: buttonBar.top
        width: parent.width
        model: animalsModel
        delegate: Text {
            required property string name
            text: name
            font.pixelSize: 18
        }

        section.property: "size"
        section.criteria: ViewSection.FullString
        section.delegate: sectionHeading
    }
//! [0]

    Row {
        id: buttonBar
        anchors.bottom: parent.bottom
        anchors.bottomMargin: 1
        spacing: 1
        ToggleButton {
            label: "CurrentLabelAtStart"
            onToggled: {
                if (active)
                    view.section.labelPositioning |= ViewSection.CurrentLabelAtStart
                else
                    view.section.labelPositioning &= ~ViewSection.CurrentLabelAtStart
            }
        }
        ToggleButton {
            label: "NextLabelAtEnd"
            onToggled: {
                if (active)
                    view.section.labelPositioning |= ViewSection.NextLabelAtEnd
                else
                    view.section.labelPositioning &= ~ViewSection.NextLabelAtEnd
            }
        }
    }
}