qt6-qml-for-beginners/Qt6QMLBeginnersCode/13-Storage/4-SaveTheStates/Main.qml

// Copyright (c) Daniel Gakwaya.
// SPDX-License-Identifier: MIT

import QtQuick
import QtQuick.Window
import QtCore
Window {
    visible: true
    width: 640
    height: 480
    title: qsTr("Custom Settings Demo")

    Rectangle {
        id: containerRectId
        anchors.fill: parent

        Rectangle {
            id: skyId
            width: parent.width
            height: 200
            //color : "blue"
            gradient: Gradient {
                GradientStop {id: skyStartColorId; position: 0.0; color: "blue" }
                GradientStop {id: skyEndColorId; position: 1.0; color: "#66CCFF" }
            }
        }

        Rectangle {
            id: groundId
            anchors.top: skyId.bottom
            anchors.bottom: parent.bottom
            width: parent.width
            //color: "lime"
            gradient: Gradient {
                GradientStop {id: groundStartColorId; position: 0.0; color: "lime" }
                GradientStop {id: groundEndColorId; position: 1.0; color: "#66CCFF" }
            }
        }

        Image {
            id: treespringId
            x: 50
            y: 100
            width: 200
            height: 300
            source: "qrc:/images/treespringsmall.png"
        }
        Image {
            id: treeSummerId
            x: 50
            y: 100
            width: 200
            height: 300
            source: "qrc:/images/treesummersmall.png"
        }

        Rectangle {
            id : sunId
            x: parent.width - width -100
            y: 50
            width: 100
            height: 100
            color: "yellow"
            radius: 60


        }

        //state : "spring"
        state: settings.state

        //States
        states: [
            State {
                name : "summer"
                PropertyChanges {
                    target: skyId
                    color: "lightblue"

                }

                PropertyChanges {
                    target: skyStartColorId
                    color: "lightblue"
                }
                PropertyChanges {
                    target: skyEndColorId
                    color: "#EECCFF"
                }



                PropertyChanges {
                    target: treeSummerId
                    opacity: 1
                }
                PropertyChanges {
                    target: treespringId
                    opacity: 0
                }


                PropertyChanges {
                    target: groundStartColorId
                    color: "lime"
                }
                PropertyChanges {
                    target: groundEndColorId
                    color: "darkkhaki"
                }
                PropertyChanges {
                    target: sunId
                    color: "yellow"

                }


            },
            State {
                name: "spring"
                PropertyChanges {
                    target: skyId
                    color: "deepskyblue"
                }

                PropertyChanges {
                    target: skyStartColorId
                    color: "deepskyblue"
                }

                PropertyChanges {
                    target: skyEndColorId
                    color: "#AACCFF"
                }

                PropertyChanges {
                    target: treeSummerId
                    opacity: 0
                }
                PropertyChanges {
                    target: treespringId
                    opacity: 1
                }

                PropertyChanges {
                    target: groundStartColorId
                    color: "lime"
                }
                PropertyChanges {
                    target: groundStartColorId
                    color: "lime"
                }

                PropertyChanges {
                    target: sunId
                    color: "lightyellow"
                }
            }
        ]

        transitions : Transition {
            from: "*" ; to: "*"

            ColorAnimation {
                duration: 500
            }
            NumberAnimation {
                properties: "opacity"
                duration: 500
            }
        }

        MouseArea{
            anchors.fill: parent
            onClicked: {
                containerRectId.state = (containerRectId.state === "spring" ? "summer" : "spring")
            }
        }

        Settings {
            id: settings
            property string state: "spring"
        }

        Component.onDestruction: {
            settings.state = containerRectId.state
        }
    }
}