Add an accessible role to an existing class

[Oreonan]

Hi,
I'm trying to add an accessible role to an existing class.
For example, a role tree in a class of type QTreeWidget
There is a way to do this without rewrite all code to create an accessible class?
I readed all examples of qtbase/src/widget/accessible but I sucess nothing when I trying to use it on my existing app :(

[raven-worx]

@Oreonan
for items widgets (which QTreeWidget is) the accesible data is coming from the model data

[Oreonan]

Yes :), however I tried to set Qt::AccessibleRole, but it gives an compilation error

[raven-worx]

@Oreonan
a little bit more information would be helpful in order to help you
https://doc.qt.io/qt-5/qt.html#ItemDataRole-enum
There is no Qt::AccessibleRole value for example, but a Qt::AccessibleTextRole

[Oreonan]

So I can't associate a QTreeWidgetItem to checkbox accessible role for example?

[raven-worx]

@Oreonan
what do you mean with that?

[Oreonan]

I have a model representing a tree with 2 columns, one for item name, one for state (enabled/disabled). I want to set an accessible role to checkbox because I think like this a screen reader can be able to say if an item is enabled or disabled. Currently I use the accessible text role to do that but it's not a good solution for me.

[VRonin]

@Oreonan said in Add an accessible role to an existing class:

one for state (enabled/disabled)

How is this represented? QTreeWidget can represent "chackboxes" natively

[Oreonan]

It's representing by a QModel with 2 columns and using Qt::DisplayRole, here is a part of code:

    case Qt::DisplayRole :
        if(orientation == Qt::Horizontal)
        {
            switch(section)
            {
            case COLUMN_NAME: return tr("Event");
            case COLUMN_CHECK: return tr("Enabled");
            }
        }
        break;

    case Qt::DisplayRole :
        if (index.column() == COLUMN_CHECK)
            return (m_ttsselected & m_ttsevents[index.row()])? tr("Enabled") : tr("Disabled");
        Q_ASSERT(index.column() == COLUMN_NAME);
        switch(m_ttsevents[index.row()])
        {
        case TTS_USER_LOGGEDIN :
            return tr("User logged in");
        case TTS_USER_LOGGEDOUT :
            return tr("User logged out");
//...

[SGaist]

Hi,
As suggested by @raven-worx
@raven-worx said in Add an accessible role to an existing class:

Qt::AccessibleTextRole

Why not return the values you want for that role ?

[raven-worx]

@Oreonan said in Add an accessible role to an existing class:

I have a model representing a tree with 2 columns, one for item name, one for state (enabled/disabled). I want to set an accessible role to checkbox because I think like this a screen reader can be able to say if an item is enabled or disabled. Currently I use the accessible text role to do that but it's not a good solution for me.

i haven't used the accessible framework for a while, but i think you will have to create a custom accessible interface (plugin or in source) for your tree widget to represent the checkbox in the interface

[Oreonan]

Oh, hmmmm, I readed this doc but it's really difficult to do this I think :)