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Stack With Friends Demo

 import QtQuick 2.0
 import Felgo 3.0
 import "AchievementQueue.js" as AchievementQueue

 SceneBase {
   id: achievementOverlay

   // make opacity changes smooth
   Behavior on opacity {
     NumberAnimation { duration: 150}
   }

   // the achievement that is currently displayed gets stored here
   property variant achievement

   // this is called if a new achievement should be shown
   function showAchievement(ach) {
     // push the new achievement to the queue
     AchievementQueue.push(ach)
     // if no achievement is currently shown, display it
     if(!hideAfterDelay.running) display()
   }

   // this is called to actually display the first achievement in the queue
   function display() {
     // take the achievement from the queue and
     achievement = AchievementQueue.take()
     opacity = 1
     hideAfterDelay.start()
   }

   // this either hides the overlay if no more achievements are in the queue, or displays the next one
   function hide() {
     hideAfterDelay.stop()
     if(AchievementQueue.size() > 0) display()
     else opacity = 0
   }

   // the achievement is shown until the player presses it or this timer runs out
   Timer {
     id: hideAfterDelay
     interval: 10000
     onTriggered: achievementOverlay.hide()
   }

   // this is the visual representation of the achievement
   Item {
     // it needs fill the whole screen horizontally, therefore make as big as the gameWindow so it works on every display ratio
     width: parent.gameWindowAnchorItem.width
     height: 130
     anchors.left: parent.gameWindowAnchorItem.left
     anchors.top: parent.gameWindowAnchorItem.top

     // if the player presses the overlay, hide it
     MouseArea {
       anchors.fill: parent
       onClicked: achievementOverlay.hide()
     }

     // the background of the overlay
     Rectangle {
       color: "black"
       anchors.fill: parent
       opacity: 0.8
     }

     Text {
       text: "Congratulations! You just unlocked the achievement:"
       color: "white"
       font.pixelSize: 12
       font.family: fontHUD.name
       anchors.horizontalCenter: parent.horizontalCenter
       y: 8
     }

     Text {
       text:  achievement ? achievement.name : ""
       color: "white"
       font.pixelSize: 21
       font.family: fontHUD.name
       anchors.horizontalCenter: parent.horizontalCenter
       y: 36
     }

     Text {
       text: achievement ? achievement.description : ""
       color: "white"
       font.pixelSize: 8
       font.family: fontHUD.name
       anchors.horizontalCenter: parent.horizontalCenter
       y: 60
     }

     Text {
       text: achievement ? "You earned " + achievement.points + " new credits!" : ""
       color: "white"
       font.pixelSize: 12
       font.family: fontHUD.name
       anchors.horizontalCenter: parent.horizontalCenter
       y: 75
     }

     Text {
       text: "Keep on unlocking new achievements to get even more credits..."
       color: "white"
       font.pixelSize: 10
       font.family: fontHUD.name
       anchors.horizontalCenter: parent.horizontalCenter
       y: 108
     }

     // display a dummy close sign, just to give the player a hint that he can close the achievement by pressing
     Text {
       text: "X"
       color: "#444444"
       font.pixelSize: 30
       anchors.right: parent.right
       font.family: fontHUD.name
       anchors.rightMargin: 8