import QtQuick 2.0 Rectangle { width: 400 height: 400 Rectangle { id: rect objectName: "MyRect" width: 100; height: 100; color: "green" Behavior on border.width { NumberAnimation { duration: 500; } } } MouseArea { id: clicker anchors.fill: parent } states: State { name: "moved" when: clicker.pressed PropertyChanges { target: rect border.width: 4; } } }