SceneBase.qml Example File

demos/FlappyBird/qml/common/SceneBase.qml
 import QtQuick 2.0
 import VPlay 2.0

 // base component for all scenes in the game
 Scene {
   id: sceneBase
   // this is important, as it serves as the reference size for the mass of the physics objects, because the mass of a body depends on the width of its images
   width: 320
   height: 480

   opacity: 0
   // NOTE: in qt5, an opaque element is not invisible by default and would handle the mouse and keyboard input!
   // thus to disable also keyboard focus and mouse handling and make an item invisible, set visible and enabled property depending on opacity
   visible: opacity === 0 ? false : true
   enabled: visible

   Behavior on opacity { NumberAnimation{duration: 250} }

   signal enterPressed

   Keys.onPressed: {
     if(event.key === Qt.Key_Return) {
       enterPressed()
     }
   }

   Keys.onReturnPressed: {
     enterPressed()
   }
 }

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