Coffee Machine Example

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 import QtQuick 2.4
 import QtQuick.Controls 2.0
 import QtQuick.Layouts 1.3
 import Coffee 1.0

 Item {
     id: root

     width: Constants.width + Constants.leftSideBarWidth
     height: Constants.height

     property alias milkSlider: milkSlider
     property alias sugarSlider: sugarSlider

     property alias brewButtonSelection: brewButtonSelection
     property bool selected: false
     property alias brewButton: brewButton
     property alias sideBar: sideBar
     property alias backButton: backButton

     property alias questionVisible: cup.questionVisible

     property real coffeeAmount: 5

     property bool inSettings: false

     state: "initial state"

     Rectangle {
         id: rectangle
         color: Constants.backgroundColor
         anchors.fill: parent
     }

     Rectangle {
         id: rightSideBar

         x: 658
         y: 0
         width: Constants.leftSideBarWidth
         height: 768
         color: "#eec1a2"
         visible: false
         anchors.right: parent.right

         Column {
             spacing: 32
             anchors.bottom: brewButton.top
             anchors.bottomMargin: 100
             anchors.horizontalCenter: parent.horizontalCenter

             Slider {
                 id: milkSlider
                 width: 256
                 height: 48

                 to: 10
                 value: 6

                 Image {
                     x: 48
                     y: -12
                     source: "images/icons/contents/milk.png"
                 }
             }
             Slider {
                 id: sugarSlider

                 width: 256
                 height: 48
                 to: 10
                 stepSize: 1
                 value: 0

                 Image {
                     x: 48
                     y: -12
                     source: "images/icons/contents/sugar.png"
                 }
             }
         }

         NavigationButton {
             id: brewButton

             text: "Brew"
             anchors.bottom: parent.bottom
             anchors.right: parent.right
             anchors.rightMargin: Constants.defaultMargin
             anchors.bottomMargin: Constants.defaultMargin
         }
     }

     SideBar {
         id: sideBar
         width: Constants.leftSideBarWidth
     }

     states: [
         State {
             name: "initial state"
             when: !root.selected && !root.inSettings
         },
         State {
             name: "selected state"
             when: root.selected

             PropertyChanges {
                 target: cup

                 questionVisible: false
                 visible: true
             }

             PropertyChanges {
                 target: brewButton
                 visible: true
             }

             PropertyChanges {
                 target: brewButtonSelection
                 visible: true
             }
         },
         State {
             name: "settings"
             when: root.inSettings
             PropertyChanges {
                 target: cup
                 x: 354
                 y: 0
                 questionVisible: false
                 visible: true
                 milkAmount: milkSlider.value
                 sugarAmount: sugarSlider.value
             }

             PropertyChanges {
                 target: brewButton
                 visible: true
             }

             PropertyChanges {
                 target: backButton
                 opacity: 1
             }

             PropertyChanges {
                 target: rightSideBar
                 visible: true
             }
         }
     ]

     CupForm {
         id: cup
         anchors.right: rightSideBar.left
         anchors.left: sideBar.right
         visible: true
         milkAmount: sideBar.currentMilk
         coffeeAmount: sideBar.currentCoffeeAmount
         coffeeLabel: sideBar.currentCoffee
         questionVisible: true
     }
     NavigationButton {
         id: backButton
         text: "Back"
         opacity: 0
         anchors.leftMargin: Constants.defaultMargin
         anchors.bottom: parent.bottom
         anchors.left: sideBar.right
         anchors.bottomMargin: Constants.defaultMargin
         forward: false
     }

     NavigationButton {
         id: brewButtonSelection

         anchors.left: sideBar.right
         anchors.leftMargin: Constants.defaultMargin
         anchors.bottom: parent.bottom
         anchors.bottomMargin: Constants.defaultMargin
         visible: false
     }
 }