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<h1 class="title">property-animation.qml Example File</h1>
<span class="subtitle">animation/basics/property-animation.qml</span>
<!-- $$$animation/basics/property-animation.qml-description -->
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  /****************************************************************************
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  ** Copyright (C) 2017 The Qt Company Ltd.
  ** Contact: https://www.qt.io/licensing/
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  ** This file is part of the examples of the Qt Toolkit.
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  import QtQuick 2.0

  Item {
      id: window
      width: 320; height: 480

      // Let's draw the sky...
      Rectangle {
          anchors { left: parent.left; top: parent.top; right: parent.right; bottom: parent.verticalCenter }
          gradient: Gradient {
              GradientStop { position: 0.0; color: "#14148c" }
              GradientStop { position: 1.0; color: "#14aaff" }
          }
      }

      // ...and the ground.
      Rectangle {
          anchors { left: parent.left; top: parent.verticalCenter; right: parent.right; bottom: parent.bottom }
          gradient: Gradient {
              GradientStop { position: 0.0; color: "#80c342" }
              GradientStop { position: 1.0; color: "#006325" }
          }
      }

      // The shadow for the smiley face
      Image {
          anchors.horizontalCenter: parent.horizontalCenter
          y: smiley.minHeight + 58
          source: "images/shadow.png"

          // The scale property depends on the y position of the smiley face.
          scale: smiley.y * 0.5 / (smiley.minHeight - smiley.maxHeight)
      }

      Image {
          id: smiley
          property int maxHeight: window.height / 3
          property int minHeight: 2 * window.height / 3

          anchors.horizontalCenter: parent.horizontalCenter
          y: minHeight
          source: "images/face-smile.png"

          // Animate the y property. Setting loops to Animation.Infinite makes the
          // animation repeat indefinitely, otherwise it would only run once.
          SequentialAnimation on y {
              loops: Animation.Infinite

              // Move from minHeight to maxHeight in 300ms, using the OutExpo easing function
              NumberAnimation {
                  from: smiley.minHeight; to: smiley.maxHeight
                  easing.type: Easing.OutExpo; duration: 300
              }

              // Then move back to minHeight in 1 second, using the OutBounce easing function
              NumberAnimation {
                  from: smiley.maxHeight; to: smiley.minHeight
                  easing.type: Easing.OutBounce; duration: 1000
              }

              // Then pause for 500ms
              PauseAnimation { duration: 500 }
          }
      }
  }

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