Strange qml property evaluation behaviour



  • Hello guys, I have the following QtQuick snippet showing behavior I don't quite understand:

    import QtQuick 2.5
    
    Rectangle {
    id: rect
    width: 300
    height: 300
    property int property1: height
    property int property2: width
     Rectangle {
        height: rect.property1
        width: {
         console.log("rect width is ", rect.property2); 
         return rect.property2;
        }
      }
    }
    

    So, I am binding rect.property2 to rect.width which is 300. I would expect the console log to appear once saying "rect width is 300", but it is output twice: "rect width is 0" and "rect width is 300". As a user, based on the above code I am not expecting rect.width to be zero (this behaviour is actually breaking the logic in my current project). But if I comment out the line "height: rect.property1" I see the expected output . Any ideas how to explain this?


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