Problems with QtQuick and sizing

topse

Hi people,
sorry - I have a feeling as if this is trivial... but I am really stuck on this:

@ Item { <- QML Item: Binding loop detected for property "width"
id: contentItem
anchors.left: parent.left
width: childrenRect.width
height: childrenRect.height
}@

Same message for height on same line...

This is of course an excerpt of a bigger file -- ao I question myself: is the error message pointing to the right place or does it mean something else? Am I not allowed to define height and width for an Item from the children?

Thanks for advice -- also for where I can read about it :-/

The Captain

JKSH

Hi,

A binding loop means you have circular dependencies. For example,

@
Rectangle {
id: outerRect
width: innerRect.width

Rectangle {
    id: innerRect
    width: outerRect.width
}

}
@

If you want to calculate the width of outerRect, you first need to calculate the width of innerRect. But, if you want to calculate the width of innerRect, you first need to calculate the width of outerRect. Thus, it is impossible to find the widths of either rectangle.

topse

Hi,
thanks for the clarification... As far as I see, "width: childrenRect.width" should not be circular?

Thanks again,
Tobias

JKSH

You're welcome :)

[quote author="topse" date="1406810154"]As far as I see, "width: childrenRect.width" should not be circular?[/quote]By itself, it's not circular. However, do any of your children's widths depend on the parent's width? How are each of your children's widths calculated?

topse

Thanks again ... I will check it... what a pitty that the debugger does not give more information :-/

Tobias