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Qt Quick Pointer Handlers depend on this behavior:
QQuickPointerHandler::onGrabChanged() receives only the grabber that
was losing the grab or the one that is receiving it, not both at the
same time. UngrabExclusive means the original grabber simply
relinquished the grab by setting the exclusive grabber to null.
CancelGrabExclusive means the new grabber took over the grab that the
old grabber had before.
Task-number: QTBUG-86729
Change-Id: Iefca6fe91b11fcb03d2c6ac3598841c924facb22
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
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...not with the given point. Since QEventPoint has a constructor that
takes an id, it's possible to write something like
pointerEvent->setExclusiveGrabber(pointId, object)
which will construct a QEventPoint on-the-fly, containing only an id.
(That was unintentional, but perhaps useful sometimes.)
setExclusiveGrabber() looks up the persistent point, but if we emit the
signal with the given point, it is missing the device. A handler
connected to that signal might reasonably assume that the point is a
complete instance; so we'd better emit the complete instance that we
found. (OTOH if the given point was a detached instance, it might also
be unexpected that the signal emits the persistent instance instead of
the given instance.) Amends 2692237bb1b0c0f50b7cc5d920eb8ab065063d47
Change-Id: Iee16363dcb22c1dc07b0cc0a81930218e22fa19e
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
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Change-Id: I87a874477b89eb3f5951930f03e305d896a24c2e
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
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QQuickEventPoint instances were very long-lived and got reused from one
event to the next. That was initially done because they were "heavy"
QObjects; but it also became useful to store state in them between
events. But this is in conflict with the ubiquitous event replay
code that assumes it's OK to hold an event instance (especially
a QMouseEvent) for any length of time, and then send it to some widget,
item or window. Clearly QEventPoints must be stored in the QPointerEvent,
if we are to avoid the need for workarounds to keep such old code working.
And now they have d-pointers, so copying is cheap. But replay code
will need to detach() their QEventPoints now.
QEventPoint is useful as an object to hold state, but we now store
the truly persistent state separately in an EventPointData struct,
in QPointingDevicePrivate::activePoints. Incoming events merely
update the persistent points, then we deliver those instead.
Thus when event handler code modifies state, it will be remembered
even when the delivery is done and the QPA event is destroyed.
This gets us a step closer to supporting multiple simultaneous mice.
Within pointer events, the points are moved up to QPointerEvent itself:
QList<QEventPoint> m_points;
This means pointCount(), point(int i) and points() can be non-virtual.
However in any QSinglePointEvent, the list only contains one point.
We hope that pessimization is worthwhile for the sake of removing
virtual functions, simplifying code in event classes themselves, and
enabling the use of the range-for loop over points() with any kind of
QPointerEvent, not just QTouchEvent. points() is a nicer API for the
sake of range-for looping; but point() is more suited to being
non-const.
In QML it's expected to be OK to emit a signal with a QPointerEvent
by value: that will involve copying the event. But QEventPoint
instances are explicitly shared, so calling setAccepted() modifies
the instance in activePoints (EventPointData.eventPoint.d->accept);
and the grabbers are stored separately and thus preserved between events.
In code such as MouseArea { onPressed: mouse.accepted = false }
we can either continue to emit the QQuickMouseEvent wrapper
or perhaps QEvent::setAccepted() could become virtual and set
the eventpoint's accepted flag instead, so that it will survive
after the event copy that QML sees is discarded.
The grabChanged() signal is useful to keep QQuickWindow informed
when items or handlers change exclusive or passive grabbers.
When a release happens at a different location than the last move event,
Qt synthesizes an additional move. But it would be "boring" if
QEventPoint::lastXPosition() accessors in any released eventpoint always
returned the same as the current QEventPoint::xPosition()s just because
of that; and it would mean that the velocity() must always be zero on
release, which would make it hard to use the final velocity to drive an
animation. So now we expect the lastPositions to be different than
current positions in a released eventpoint.
De-inline some functions whose implementations might be subject to
change later on. Improve documentation.
Since we have an accessor for pressTimestamp(), we might as well add one for
timestamp() too. That way users get enough information to calculate
instantaneous velocity, since the plan is for velocity() to be somewhat
smoothed.
Change-Id: I2733d847139a1b1bea33c00275459dcd2a145ffc
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
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* Document the new base classes QPointerEvent and QSinglePointEvent,
and move relevant documentation to be located under them.
* Replace linking to deprecated functions with their new counterparts.
* Remove non-existent function and parameter documentation.
* Document QEventPoint::State enum.
* Prefer \obsolete over \deprecated and fix the usage.
* Document the Capabilities enum in the correct location and
add docs for the missing enum values.
Change-Id: Ic8f2732f2e90ecbf522cd744c601cedcc574825c
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
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Some goals that have hopefully been achieved are:
- make QPointerEvent and QEventPoint resemble their Qt Quick
counterparts to such an extent that we can remove those wrappers
and go back to delivering the original events in Qt Quick
- make QEventPoint much smaller than QTouchEvent::TouchPoint, with no pimpl
- remove most public setters
- reduce the usage of complex constructors that take many arguments
- don't repeat ourselves: move accessors and storage upwards
rather than having redundant ones in subclasses
- standardize the set of accessors in QPointerEvent
- maintain source compatibility as much as possible: do not require
modifying event-handling code in any QWidget subclass
To avoid public setters we now introduce a few QMutable* subclasses.
This is a bit like the Builder pattern except that it doesn't involve
constructing a separate disposable object: the main event type can be
cast to the mutable type at any time to enable modifications, iff the
code is linked with gui-private. Therefore event classes can have
less-"complete" constructors, because internal Qt code can use setters
the same way it could use the ones in QTouchEvent before; and the event
classes don't need many friends. Even some read-accessors can be kept
private unless we are sure we want to expose them.
Task-number: QTBUG-46266
Fixes: QTBUG-72173
Change-Id: I740e4e40165b7bc41223d38b200bbc2b403e07b6
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
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There doesn't seem to be any reason users will need to query tablet
devices by their IDs, because every event comes with a complete
instance already, and we have QInputDevice::devices() to list them all.
QPointingDevicePrivate::tabletDevice() can create a new instance if a
matching one is not found (and complains about that); it's intended
for use in QtGui, as a way to find the device if it was not part of the
QWSI event. Now it sets the parent of those auto-created instances
to QCoreApplication to avoid a memory leak.
On the other hand, queryTabletDevice() is intended for use in platform plugins
that need to check whether an instance exists; but they will take care
of creating new instances themselves, and thus have more control over the
parent and the details being stored. Now that the systemId can also be given,
the search is more likely to have a unique result, on window systems
that provide device IDs.
Rename id() to systemId() to clarify that it's a system-specific unique
device ID of some sort, not the same as the uniqueId that a stylus has.
However it seems that in practice, this will often be 0; so clarify that
if it's not unique, QInputDevicePrivate::fromId() and queryTabletDevice()
may not always find the right instance.
Clarify the function usage via comments.
Change-Id: I82bb8d1c26eeaf06f07c290828aa17ec4a31646b
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
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It was missing some spaces. Now looks like
QPointingDevice("Wacom Intuos3 6x8 Pen stylus", type=Stylus, id=b, seat=30002, pointerType=Pen, capabilities=Position|Pressure|MouseEmulation|Hover|XTilt|YTilt, maximumTouchPoints=1, uniqueId=4c00079)
Change-Id: I4a8203a2a5ee1f8c5c53a6a85b40ec1d25a3c2c0
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
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Otherwise it will leak.
Change-Id: I1c522dace0139dac3e626399963f58c56f052aba
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
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The idea was to keep nagging us to update all the platform plugins to
do device registration. But besides being annoying, it would cause
test failures if we start adding QTest::ignoreMessage() all over,
and then some platforms start doing device registration properly.
Change-Id: Ia0fbb64cf86f33532be032ec9eebe6e4ad607f20
Reviewed-by: Laszlo Agocs <laszlo.agocs@qt.io>
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This was causing some bogus failures in Qt Quick autotests.
Existing APIs like QQuickWindow::mouseGrabberItem() are not really
compatible with the idea of a mouse-less system; but perhaps we can
revisit this later.
Task-number: QTBUG-85114
Change-Id: Id1c2e5894e5cf13a79998aaea28d5f42fad920cf
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
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There was a decision to use QList consistently in public API, now that
it's supposed to perform as well as QVector. Amends
6589f2ed0cf78c9b8a5bdffcdc458dc40a974c60
Task-number: QTBUG-46412
Task-number: QTBUG-72167
Change-Id: I30004792667ee0581a433409ac2e20ffc645e952
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
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We have seen during the Qt 5 series that QMouseEvent::source() does
not provide enough information: if it is synthesized, it could have
come from any device for which mouse events are synthesized, not only
from a touchscreen. By providing in every QInputEvent as complete
information about the actual source device as possible, we will enable
very fine-tuned behavior in the object that handles each event.
Further, we would like to support multiple keyboards, pointing devices,
and named groups of devices that are known as "seats" in Wayland.
In Qt 5, QPA plugins registered each touchscreen as it was discovered.
Now we extend this pattern to all input devices. This new requirement
can be implemented gradually; for now, if a QTWSI input event is
received wtihout a device pointer, a default "core" device will be
created on-the-fly, and a warning emitted.
In Qt 5, QTouchEvent::TouchPoint::id() was forced to be unique even when
multiple devices were in use simultaneously. Now that each event
identifies the device it came from, this hack is no longer needed.
A stub of the new QPointerEvent is added; it will be developed further
in subsequent patches.
[ChangeLog][QtGui][QInputEvent] Every QInputEvent now carries a pointer
to an instance of QInputDevice, or the subclass QPointingDevice in case
of mouse, touch and tablet events. Each platform plugin is expected to
create the device instances, register them, and provide valid pointers
with all input events. If this is not done, warnings are emitted and
default devices are created as necessary. When the device has accurate
information, it provides the opportunity to fine-tune behavior depending
on device type and capabilities: for example if a QMouseEvent is
synthesized from a touchscreen, the recipient can see which touchscreen
it came from. Each device also has a seatName to distinguish users on
multi-user windowing systems. Touchpoint IDs are no longer unique on
their own, but the combination of ID and device is.
Fixes: QTBUG-46412
Fixes: QTBUG-72167
Task-number: QTBUG-69433
Task-number: QTBUG-52430
Change-Id: I933fb2b86182efa722037b7a33e404c5daf5292a
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
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