[Development] Proposal: change QML Flickable's flickableDirection default value to AutoFlickIfNeeded in 5.8

[Andrea Bernabei]

2016-07-26 18:42 GMT+01:00 Alexander Nassian <nassian at bitshift-dynamics.de>:

> Hi Andrea,
>
> Good proposal! But one little hint: The current behavior is not that
> confusing as you describe. On iOS and OS X for example the current behavior
> is normal.
>
>
Thanks Alexander!

And thanks for your input, that's exactly the kind of info I'm looking for
:) Let's hear some more opinions :)


>
> Beste Grüße / Best regards,
> Alexander Nassian
> http://www.bitshift-dynamics.de
>
> Am 26.07.2016 um 16:12 schrieb Andrea Bernabei <and.bernabei at gmail.com>:
>
> Hello everyone,
>
> I'd like to propose changing the default value of QML Flickable's
> flickableDirection in Qt 5.8.
>
> The current default value is Flickable.AutoFlickDirection
> The description is: it "allows flicking vertically if the *contentHeight*
> is not equal to the *height* of the Flickable. Allows flicking
> horizontally if the *contentWidth* is not equal to the *width* of the
> Flickable."
>
> It seems to me like the current default was chosen to make it so that the
> surface is always draggable except for things like vertical ListViews
> (where contentWidth==width, or the same for height in the case of
> horizontal lists).
>
> I propose we should change the default value to
> Flickable.AutoFlickIfNeeded (added by Shawn, Flickable's maintainer, in 5.7
> https://codereview.qt-project.org/#/c/150388/ ).
>
> I'll try using bullet points to avoid a wall of text.
>
> Proposal:
> Change default Flickable's flickableDirection to AutoFlickIfNeeded in
> Qt5.8, and only available when importing QtQuick >= 2.8
>
> Why:
> The current behaviour is a bit confusing. If we only take the horizontal
> dimension into account:
> - content narrower than Flickable --> content IS draggable (why?)
> - content same size as Flickable --> content NOT draggable
> - content wider than Flickable      --> content IS draggable
>
> While with the proposed change:
> - content narrower than Flickable --> content NOT draggable
> - content same size as Flickable --> content NOT draggable
> - content wider than Flickable      --> content IS draggable
>
> I believe the new behaviour is better, the content is only draggable when
> dragging "makes sense", i.e. when dragging would reveal additional content
> that would otherwise be hidden.
>
> What do you guys think?
>
> Cheers,
> Andrea (faenil)
>
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