[Alexander]

Hi!

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!

 

Alexander

[AlexFelgo 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”.

Cheers,
Alex

[Alexander]

Hi Alex,

 

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

 

Cheers,

Alexander