Learn what Felgo offers to help your business succeed. Start your free evaluation today! Felgo for Your Business


OverviewFelgo 3 Support (Qt 5) › Multiple screens tutorial – Cannot assign to non-existent property "creditsPress

Viewing 3 posts - 1 through 3 (of 3 total)
  • Author
  • #16115



    I am trying to do the multiple screens tutorial but I am stuck at the point where the signals of the scenes are used to switch between them.

    This is my Main.qml

    import Felgo 3.0
    import QtQuick 2.0
    import "scenes"
    GameWindow {
        id: gameWindow
        screenWidth: 960
        screenHeight: 640
        EntityManager {
            id: entityManager
        // menu scene
        MenuScene {
            id: menuScene
            // listen to the button signals of the scene and change the state according to it
            startSimulationPressed: gameWindow.state = "game"
            creditsPressed: gameWindow.state = "credits"
        // game scene
        GameScene {
            id: gameScene
            //onMenuScenePressed: gameWindow.state = "menu"
        // credits scene
        CreditsScene {
            id: creditsScene
        // default state is menu -> default scene is menuScene
        state: "menu"
        activeScene: menuScene
        // state machine, takes care of reversing the PropertyChanges when changing the state. e.g. it changes the opacity back to 0
        states: [
            State {
                name: "menu"
                PropertyChanges {target: menuScene; opacity: 1}
                PropertyChanges {target: gameWindow; activeScene: menuScene}
            State {
                name: "game"
                PropertyChanges {target: golScene; opacity: 1}
                PropertyChanges {target: gameWindow; activeScene: gameScene}
            State {
                name: "credits"
                PropertyChanges {target: creditsScene; opacity: 1}
                PropertyChanges {target: gameWindow; activeScene: creditsScene}


    And this my MenuScene.qml

    import Felgo 3.0
    import QtQuick 2.0
    import "../entities"
    // The Menu Scene
    SceneBase {
        id: menuScene
        // signal indicating that the gameScene should be displayed
        signal startSimulationPressed
        // signal indicating that the creditsScene should be displayed
        signal creditsPressed
        // background
        Rectangle {
            anchors.fill: parent.gameWindowAnchorItem
            color: "#47688e"
        // the "logo"
        Text {
            anchors.horizontalCenter: parent.horizontalCenter
            y: 30
            font.pixelSize: 30
            color: "#e9e9e9"
            text: "MultiSceneMultiLevel"
        // menu
        Column {
            anchors.centerIn: parent
            spacing: 10
            MenuButton {
                text: "Start Simulation"
                onClicked: startSimulationPressed()
            MenuButton {
                text: "Credits"
                onClicked: creditsPressed()


    So with this setup, I always get the error “…qml/Main.qml:21 Cannot assign to non-existent property “creditsPressed”. The weird thing is, before I got the exact same thing for the other signal. I just rearranged some things in both files and now I get the other error.


    After trying out several changes and looking up the tutorial up and down I cannot find any explanation for this behavior and would appreciate some help for that.


    Thx in advance!




    Felgo Team

    Hi Alexander,

    please have a closer look at how you are using the signals. If the signal is named “creditsPressed”, the correct handler is called “onCreditsPressed”.




    Hi Alex,


    Thx for the quick reply! With the renaming it worked now.




Viewing 3 posts - 1 through 3 (of 3 total)

RSS feed for this thread

You must be logged in to reply to this topic.

Qt_Technology_Partner_RGB_475 Qt_Service_Partner_RGB_475_padded