Cannot anchor Page children to the page

Saucy's version is 0.1.46+13.10.20131011.2-0ubuntu1 aka. bzr revision 793. Testing this sample program I can confirm that something has changed: it used to work, it does not anymore.

Determining where the issue lies: application code that should never have worked in the first place or toolkit regression?

One visible difference is that with the latest trunk the following warning is outputted to the console:
file:///home/kaleo/emptylist.qml:30:13: QML Flickable: Cannot anchor to an item that isn't a parent or sibling.

That warning is caused by line:

                anchors.bottom: soundsPage.bottom

which should be working so we can safely say that this is a regression in the toolkit.

Bumping to critical.

Reverting revision 819 fixes the issue.

Revision 819 was fixing bug 1223604

In 819, internally the Page adds a container to which the contents is added. This was done to have a MouseArea on top of that area (and only that area, not over toolbar or header) to detect apps clicks. So in the app code, it should anchor to parent.bottom, not soundspage.bottom.

True. Though it is unexpected that the Page is not the parent.

I don't understand something though. In the Page code I see:

    Item {
        id: contentsItem
        anchors.fill: parent
    }

    MouseArea {
        id: contentsArea
        anchors.fill: contentsItem
        [...]

That means that contentsArea will invariably cover contentsItem's parent which is the page, no?

FYI, we use the same construction in MainView, Tabs, Toolbar, Dialog, Popover, Sheet, all list items.

So instead of the current construction in Page, we can set the z-value of the MouseArea.

Also need to add a regression test.

Simpler test program to reproduce the bug:

import QtQuick 2.0
import Ubuntu.Components 0.1

MainView {
    width: units.gu(20)
    height: units.gu(40)

    Page {
        id: page
        Rectangle {
            color: "red"
            anchors.fill: page
        }
    }
}

This was released as part of this release (just missing the bug reference in the upload):

ubuntu-ui-toolkit (0.1.46+14.04.20131108.4-0ubuntu1) trusty; urgency=low

  [ Robert Bruce Park ]
  * (no message)

  [ Ubuntu daily release ]
  * Automatic snapshot from revision 830

https://launchpad.net/ubuntu/trusty/+source/ubuntu-ui-toolkit/0.1.46+14.04.20131108.4-0ubuntu1