touch-packages team mailing list archive

[Olivier Tilloy <olivier.tilloy@xxxxxxxxxxxxx>]

Please test again. Just open the attached QML file in qmlscene (ensure
that there is a test.jpg image in the same directory), and verify that
nothing is being printed out to the console. If you comment out the
import of Ubuntu.Components, you get logs for source changed and status
changed every second.

** Changed in: ubuntu-ui-toolkit (Ubuntu)
       Status: Incomplete => New

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https://bugs.launchpad.net/bugs/1401920

Title:
  Image extension fails to notify of source changes

Status in ubuntu-ui-toolkit package in Ubuntu:
  New

Bug description:
  When importing Ubuntu.Components, the base Image QML type is enhanced
  (with the UCQQuickImageExtension class) to add transparent support for
  scaling assets.

  This breaks the emission of the sourceChanged signal. Application
  developers cannot implement the onSourceChanged slot to be notified of
  changes to the value of the 'source' property, and this isn’t
  documented anywhere.

  Another issue I’m observing with this custom extension is that an
  image is not reloaded if I do the following, and invoke the reload()
  function on the image (this works if I comment out the import of
  Ubuntu.Components):

      Image {
          cache: false
          function reload() {
              var s = source
              source = ""
              source = s
          }
      }

  Similarly (and maybe even more worrying), actually changing the value
  of the source property (by appending a fragment to the URL) doesn’t
  trigger a reload either, as demonstrated by the attached example
  (requires a random image named "test.jpg" in the same folder).

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