Qt5.2

Studying StackView but have no idea how to use it.

Qt Code: 
  1. import QtQuick 2.2
  2.     import QtQuick.Controls 1.1
  3.  
  4.     Rectangle {
  5.         id: root
  6.  
  7.         width: 360
  8.         height: 360
  9.  
  10.         Column{
  11.  
  12.             Button{
  13.                 width: root.width
  14.                 height: root.height / 10
  15.  
  16.                 onClicked: {
  17.                     stackView.push({item:Rectangle, properties: {width: root.width, height: root.height}})
  18.                 }
  19.             }
  20.  
  21.             StackView {
  22.                 id: stackView
  23.                 delegate: StackViewDelegate {
  24.                     function transitionFinished(properties)
  25.                     {
  26.                         properties.exitItem.opacity = 1
  27.                     }
  28.  
  29.                     property Component pushTransition: StackViewTransition {
  30.                         PropertyAnimation {
  31.                             target: enterItem
  32.                             property: "opacity"
  33.                             from: 0
  34.                             to: 1
  35.                         }
  36.                         PropertyAnimation {
  37.                             target: exitItem
  38.                             property: "opacity"
  39.                             from: 1
  40.                             to: 0
  41.                         }
  42.                     }
  43.                 }
  44.             }
  45.         }
  46.     }
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