gridview.qml Example File

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 import QtQuick 2.12
 import QtQml.Models 2.1

 GridView {
     id: root
     width: 320; height: 480
     cellWidth: 80; cellHeight: 80

     displaced: Transition {
         NumberAnimation { properties: "x,y"; easing.type: Easing.OutQuad }
     }

     model: DelegateModel {
         id: visualModel
         model: ListModel {
             id: colorModel
             ListElement { color: "blue" }
             ListElement { color: "green" }
             ListElement { color: "red" }
             ListElement { color: "yellow" }
             ListElement { color: "orange" }
             ListElement { color: "purple" }
             ListElement { color: "cyan" }
             ListElement { color: "magenta" }
             ListElement { color: "chartreuse" }
             ListElement { color: "aquamarine" }
             ListElement { color: "indigo" }
             ListElement { color: "black" }
             ListElement { color: "lightsteelblue" }
             ListElement { color: "violet" }
             ListElement { color: "grey" }
             ListElement { color: "springgreen" }
             ListElement { color: "salmon" }
             ListElement { color: "blanchedalmond" }
             ListElement { color: "forestgreen" }
             ListElement { color: "pink" }
             ListElement { color: "navy" }
             ListElement { color: "goldenrod" }
             ListElement { color: "crimson" }
             ListElement { color: "teal" }
         }
         delegate: DropArea {
             id: delegateRoot

             width: 80; height: 80

             onEntered: visualModel.items.move(drag.source.visualIndex, icon.visualIndex)
             property int visualIndex: DelegateModel.itemsIndex
             Binding { target: icon; property: "visualIndex"; value: visualIndex }

             Rectangle {
                 id: icon
                 property int visualIndex: 0
                 width: 72; height: 72
                 anchors {
                     horizontalCenter: parent.horizontalCenter;
                     verticalCenter: parent.verticalCenter
                 }
                 radius: 3
                 color: model.color

                 Text {
                     anchors.centerIn: parent
                     color: "white"
                     text: parent.visualIndex
                 }

                 DragHandler {
                     id: dragHandler
                 }

                 Drag.active: dragHandler.active
                 Drag.source: icon
                 Drag.hotSpot.x: 36
                 Drag.hotSpot.y: 36

                 states: [
                     State {
                         when: icon.Drag.active
                         ParentChange {
                             target: icon
                             parent: root
                         }

                         AnchorChanges {
                             target: icon
                             anchors.horizontalCenter: undefined
                             anchors.verticalCenter: undefined
                         }
                     }
                 ]
             }
         }
     }
 }