QML Dynamic View Ordering Tutorial 1 - A Simple ListView and Delegate

We begin our application by defining a ListView, a model which will provide data to the view, and a delegate which provides a template for constructing items in the view.

The code for the ListView and delegate looks like this:

 import QtQuick

 Rectangle {
     id: root

     width: 300
     height: 400

     Component {
         id: dragDelegate

         Rectangle {
             id: content

             required property string name
             required property string type
             required property string size
             required property int age

             width: view.width
             height: column.implicitHeight + 4

             border.width: 1
             border.color: "lightsteelblue"

             radius: 2

             Column {
                 id: column
                 anchors {
                     fill: parent
                     margins: 2
                 }

                 Text { text: qsTr('Name: ') + content.name }
                 Text { text: qsTr('Type: ') + content.type }
                 Text { text: qsTr('Age: ') + content.age }
                 Text { text: qsTr('Size: ') + content.size }
             }
         }
     }
     ListView {
         id: view

         anchors {
             fill: parent
             margins: 2
         }

         model: PetsModel {}
         delegate: dragDelegate

         spacing: 4
         cacheBuffer: 50
     }
 }

The model is defined in a separate QML file which looks like this:

 import QtQuick

 ListModel {
     ListElement {
         name: qsTr("Polly")
         type: qsTr("Parrot")
         age: 12
         size: qsTr("Small")
     }
     ListElement {
         name: qsTr("Penny")
         type: qsTr("Turtle")
         age: 4
         size: qsTr("Small")
     }
 }

Walkthrough

The first item defined within the application's root Rectangle is the delegate Component. This is the template from which each item in the ListView is constructed.

The name, age, type, and size variables referenced in the delegate are sourced from the model data. The names correspond to roles defined in the model.

     Component {
         id: dragDelegate

         Rectangle {
             id: content

             required property string name
             required property string type
             required property string size
             required property int age

             width: view.width
             height: column.implicitHeight + 4

             border.width: 1
             border.color: "lightsteelblue"

             radius: 2

             Column {
                 id: column
                 anchors {
                     fill: parent
                     margins: 2
                 }

                 Text { text: qsTr('Name: ') + content.name }
                 Text { text: qsTr('Type: ') + content.type }
                 Text { text: qsTr('Age: ') + content.age }
                 Text { text: qsTr('Size: ') + content.size }
             }
         }
     }

The second part of the application is the ListView itself to which we bind the model and delegate.

     ListView {
         id: view

         anchors {
             fill: parent
             margins: 2
         }

         model: PetsModel {}
         delegate: dragDelegate

         spacing: 4
         cacheBuffer: 50
     }

Example project @ code.qt.io