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OverviewFelgo 2 Support (Qt 5) › Crash when modifying a nested attribute

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  • #12235

    Kool

    Hi guys, I’m a bit stuck on this crash and was hoping you could help.

    As a minimal example, let’s say I’m creating a graph.

    Point.qml:

    import QtQuick 2.0
    
    Item {
        id: point
        property string shape: "X"
    }
    

    Point is contained in Graph.qml:

    import QtQuick 2.0
    import Felgo 3.0
    
    EntityBase {
        id: graph
        entityType: "Graph"
    
        width: 10
        height: 10
    
        property Point point: point
    
        Point {
            id: point
        }
    }
    

    And we use Graph.qml in the Scene of Main.qml (empty Felgo project):

        Scene {
            id: scene
    
            // the "logical size" - the scene content is auto-scaled to match the GameWindow size
            width: 480
            height: 320
    
            Graph {
                id: graph
                x: 0
                y: 0
                point.attribute: "D"
            }
    
        }

    Note that I’ve attempted to modify the Point attribute as a default parameter in the creation of the Graph. This is leading the program to crash, without the line ‘point.attribute: “D”‘, it runs as normal.

    I’m not sure whether this is a bug or something’s up with my syntax.

    Any chance you could advise?
    Cheers!

     

    #12236

    Kool
    #12239

    Günther
    Felgo Team

    Hi KoolBanana!

    Whenever you want to make nested items publicly accessible (like your Point in Graph.qml), a property alias should do the trick:

    EntityBase {
        id: graph
        entityType: "Graph"
    
        width: 10
        height: 10
    
        property alias point: point
    
        Point {
            id: point
        }
    }

     

    Cheers, Günther

    #12241

    Kool

    Worked a treat, cheers Günther!

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