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  1. Qt
  2. QTBUG-111400

figure out how to get Wacom tablet proximity position; deliver to window

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    • Icon: Task Task
    • Resolution: Unresolved
    • Icon: P3: Somewhat important P3: Somewhat important
    • None
    • 6.5
    • GUI: Wacom Tablet Input
    • None

      This feature has always been missing. Last time I looked, it seemed that we would need to wait for the tablet move event that comes after the proximity-enter, because the position info (etc) is missing from the proximity-enter event itself. And so, we've never been able to deliver TabletEnterProximity events to the appropriate QWindow: you have to subclass Q(Gui)Application to get the events (as in qtbase/examples/widgets/widgets/tablet/tabletapplication.cpp) or install an event filter (as in qtbase/tests/auto/gui/kernel/qwindow/tst_qwindow.cpp).

      While we're at it, we can add whatever else we can get, and remove as many Q_UNUSED as possible from this:

      bool QWindowSystemInterface::handleTabletEnterLeaveProximityEvent(QWindow *window, ulong timestamp, const QPointingDevice *device,
                                                                  bool inProximity, const QPointF &local, const QPointF &global,
                                                                  Qt::MouseButtons buttons, int xTilt, int yTilt,
                                                                  qreal tangentialPressure, qreal rotation, int z,
                                                                  Qt::KeyboardModifiers modifiers)
{
    Q_UNUSED(window);
    Q_UNUSED(local);
    Q_UNUSED(global);
    Q_UNUSED(buttons);
    Q_UNUSED(xTilt);
    Q_UNUSED(yTilt);
    Q_UNUSED(tangentialPressure);
    Q_UNUSED(rotation);
    Q_UNUSED(z);
    Q_UNUSED(modifiers);
    return inProximity
        ? handleWindowSystemEvent<QWindowSystemInterfacePrivate::TabletEnterProximityEvent>(timestamp, device)
        : handleWindowSystemEvent<QWindowSystemInterfacePrivate::TabletLeaveProximityEvent>(timestamp, device);
}

    class TabletEnterProximityEvent : public PointerEvent {
    public:
        // TODO store more info: position and whatever else we can get on most platforms
        TabletEnterProximityEvent(ulong time, const QPointingDevice *device)
            : PointerEvent(nullptr, time, TabletEnterProximity, Qt::NoModifier, device) { }
    };

    class TabletLeaveProximityEvent : public PointerEvent {
    public:
        // TODO store more info: position and whatever else we can get on most platforms
        TabletLeaveProximityEvent(ulong time, const QPointingDevice *device)
            : PointerEvent(nullptr, time, TabletLeaveProximity, Qt::NoModifier, device) { }
    };

      If we can deliver the proximity events to the window, it will be much easier to make use of them in Qt Quick.

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            srutledg Shawn Rutledge
            srutledg Shawn Rutledge
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              Created:
              Updated: