Tour Preview

Find the Best Demos and Examples

Check out this quick tour to find the best demos and examples for you, and to see how the Felgo SDK can help you to develop your next app or game!

Forums

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

Viewing 4 posts - 1 through 4 (of 4 total)
  • Author
    Posts
  • #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!

Viewing 4 posts - 1 through 4 (of 4 total)

RSS feed for this thread

You must be logged in to reply to this topic.