Files show "0 bytes" immediately after loading to device

[Alan Pope 🍺🐧🐱 🦄]

Start with a device containing no documents.
Open DocViewer
Copy documents via MTP / adb
Observe the documents appearing in the list.

Note that the file size shows as zero (presumably because DocViewer notices the files arrive before they've finished being written to).

You can force a refresh by switching to grid mode and back to list mode, but it would be nicer if the documents showed up with the correct file size once they have finished copying.

[Phill (phill.l)]

I've identified a bug in `gvfs` that may be causing this in all applications that use the mounted gvfs-fuse filing system to access MTP devices.

Could this bug be a symptom of that? See #1487546.

[Stefano Verzegnassi (verzegnassi-stefano)]

I had a check some time ago and our file watcher properly updates file informations in the model.

Looking at the source code[1], it rather seems that we don't inform the view that an entry in the model has been updated, since the dataChanged() signal[2] is not emitted.

SOLUTION:
Emit dataChanged() signal in DocumentModel::q_fileModified(...)

====
Refs.

[1]: http://bazaar.launchpad.net/~ubuntu-docviewer-dev/ubuntu-docviewer-app/lo-viewer/view/head:/src/plugin/file-qml-plugin/documentmodel.cpp

[2]: http://doc.qt.io/qt-5/qabstractitemmodel.html#dataChanged

[Jenkins Bot (ubuntu-core-apps-jenkins-bot)]

Fix committed into lp:ubuntu-docviewer-app at revision 322, scheduled for release in ubuntu-docviewer-app, milestone ww02-2016