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  1. Qt
  2. QTBUG-62023

Binding loop detection fails on Dialog depending on order of imports

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      Trying to instantiate a Dialog within a Component binding x,y properties will fail with a binding loop when the QtQuick.Controls import comes before  the QtQuick.Dialogs one.

      Steps to reproduce:

      • Run the attached project or the following code:
      // NOTE: Keep QtQuick.Controls before QtQuick.Dialogs in the imports

import QtQuick 2.7
import QtQuick.Controls 2.2
import QtQuick.Dialogs 1.2

Item
{
    id: form

    Component
    {
        id: dialogComponent
        Dialog
        {
            property alias name: dialogName.text
            x: (parent.width - width) / 2
            y: (parent.height - height) / 2
            title: "Please choose a name"
            standardButtons: Dialog.Ok | Dialog.Cancel
            Row
            {
                anchors.verticalCenter: parent.verticalCenter
                anchors.horizontalCenter: parent.horizontalCenter
                spacing: 20
                Label {
                    text: qsTr("Name")
                    verticalAlignment: Text.AlignVCenter
                    horizontalAlignment: Text.AlignHCenter
                }

                TextField {
                    id: dialogName
                    width: 217
                    horizontalAlignment: Text.AlignHCenter
                }
            }
        }
    }

    Button
    {
        id: button1
        x: 256
        y: 58
        text: qsTr("Press Me")
        onClicked:
        {
            var dialog = dialogComponent.createObject(form)
            dialog.visible = true
        }
    }
}
      • Press the button and observe the following output:
      qrc:/Page1.qml:18:9: QML DefaultDialogWrapper: Binding loop detected for property "x"
qrc:/Page1.qml:18:9: QML DefaultDialogWrapper: Binding loop detected for property "x"
qrc:/Page1.qml:18:9: QML DefaultDialogWrapper: Binding loop detected for property "y"
qrc:/Page1.qml:18:9: QML DefaultDialogWrapper: Binding loop detected for property "y"

      To workaround the issue just modify the order of the imports in this way:

      import QtQuick 2.7
import QtQuick.Dialogs 1.2
import QtQuick.Controls 2.2

      In this case the Dialog will be shown correctly.

        1. DialogBindingLoopImportsOrder.7z
          2 kB
          Francesco Pretto
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            shausman Simon Hausmann
            ceztko Francesco Pretto
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              Created:
              Updated:

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