After further investigation and discussion, this seems to be the problem: - focusWindow changes after the components are completed. - change of focusWindow registers a new 'window' context property. - registering a new context property, causes a re-evaluation of properties in the context.
So the properties of variables are set twice, once before the focus window is set, and once afterwards. This gives problems, for example, in the Sections where the index is reset when its model is changed after the Sections component was completed, thus overriding the index property that was explicitly set by the app developer. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to ubuntu-ui-toolkit in Ubuntu. https://bugs.launchpad.net/bugs/1621509 Title: ListView with extension from UbuntuToolkit updates its model after the component is completed Status in ubuntu-ui-toolkit package in Ubuntu: In Progress Bug description: This is the cause for the Sections index resetting after initialization, see bug 1610231. Create the file ModelTest.qml: import QtQuick 2.4 Item { id: root width: 800 height: 600 ListView { model: root.model onModelChanged: print("LV model changed to "+model[0]+" "+model[1]+" "+model[2]+" "+model[3]) Component.onCompleted: print("ListView completed.") } Component.onCompleted: print("root item completed.") property list<QtObject> objectList onObjectListChanged: print("root.objectList changed to "+objectList[0]+" "+objectList[1]+" "+objectList[2]) property var model: objectList } And run this program modelInst.qml: import QtQuick 2.4 import Ubuntu.Components 1.3 ModelTest { QtObject { objectName: "one" id: objectOne } QtObject { objectName: "two" id: objectTwo } QtObject{ objectName: "three" id: objectThree } objectList: [objectOne, objectTwo, objectThree] } The output is as follows: $ qmlscene modelInst.qml qml: root.objectList changed to undefined undefined undefined qml: root.objectList changed to QObject(0x118abf0, "one") undefined undefined qml: root.objectList changed to QObject(0x118abf0, "one") QObject(0x118a110, "two") undefined qml: root.objectList changed to QObject(0x118abf0, "one") QObject(0x118a110, "two") QObject(0x1182f80, "three") qml: LV model changed to QObject(0x118abf0, "one") QObject(0x118a110, "two") QObject(0x1182f80, "three") undefined qml: LV model changed to QObject(0x118abf0, "one") QObject(0x118a110, "two") QObject(0x1182f80, "three") undefined qml: root item completed. qml: ListView completed. qml: LV model changed to QObject(0x118abf0, "one") QObject(0x118a110, "two") QObject(0x1182f80, "three") undefined qml: LV model changed to QObject(0x118abf0, "one") QObject(0x118a110, "two") QObject(0x1182f80, "three") undefined So the model is changed AFTER the ListView and root item are completed. When the Ubuntu.Components import is removed the output is correct: $ qmlscene modelInst.qml qml: root.objectList changed to undefined undefined undefined qml: root.objectList changed to QObject(0x171c8d0, "one") undefined undefined qml: root.objectList changed to QObject(0x171c8d0, "one") QObject(0x171d290, "two") undefined qml: root.objectList changed to QObject(0x171c8d0, "one") QObject(0x171d290, "two") QObject(0x171d420, "three") qml: LV model changed to QObject(0x171c8d0, "one") QObject(0x171d290, "two") QObject(0x171d420, "three") undefined qml: LV model changed to QObject(0x171c8d0, "one") QObject(0x171d290, "two") QObject(0x171d420, "three") undefined qml: root item completed. qml: ListView completed. Also, if there is no ListView inside ModelTest.qml, then nothing is updated after the items are completed. So I suspect the issue is in our ListView extension. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/ubuntu-ui-toolkit/+bug/1621509/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
