Hi,
yes, I understand, but in this case, how should we make to send a
notification from everywhere. In the project I'm contributing to, we
have to send notification for some events (E.G. by an user send a
message, or when we change the volume), so we have just a method to send
a text to speech message, but this method can be called from any object
class.
A solution could be to extern the QAccessibleAnnouncementEvent, but
unfortunately we don't have a setMessage method so we can't do this :(
Corentin : expert certifié 2022 et <https://linktr.ee/CoBC1>Sponsor
<https://github.com/sponsors/nvaccess?sp=CoBC> NVDA, Référent commission
Cécité & Co et Mandataire CNCPH à la commission Accessibilité
Universelle - Fédé 100% Handinamique <https://www.handinamique.org/>
Le 13/06/2024 à 12:14, Volker Hilsheimer a écrit :
On 13 Jun 2024, at 11:48, Corentin Bacqué-cazenave via
Interest<interest@qt-project.org> wrote:
Hi,
I'm trying to implement the new QAccessibleAnnouncementEvent in my project.
However, I have a class to hander some TTS functions, and this class is not
derived from QObject.
Is there a way to use QAccessibleAnnouncementEvent to send a notification to
screenreaders without a QObject class? I saw we can also use a
QAccessibleInterface but it seams we also need a QObject for this.
Does anyone have a solution?
Thanks.
--
Corentin : expert certifié 2022 et Sponsor NVDA, Référent commission Cécité &
Co et Mandataire CNCPH à la commission Accessibilité Universelle - Fédé 100%
Handinamique
Hi Corentin,
Qt's accessibility framework is based on a tree of QAcessibleInterfaces. For
most cases, that tree mirrors the corresponding QObject trees. Only QObjects
can respond to events (which is required to handle incoming calls), so an
introspection through accessibility technology has to start with something that
is a QObject (typically a widget).
But e.g. an item view’s items are not QObjects, so the implementation of
QAccessibleInterface for an item view returns interfaces for items based on
their position in the view. To raise an event for such an item, you have to get
the interface for that item, and then you can construct a
QAccessibleAnnouncementEvent with that interface.
Alternatively, if you have only one level of children and already have the
QObject that they belong to, then you can create the event with the QObject,
and the child index by calling QAccessibleEvent::setChild.
Volker
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