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Not being pressed inside the target is a necessary but not sufficient
reason to reset m_pressTargetPos to the center of the target. The
intention was rather to make the target jump into position when the
parent was a different item: e.g. if a Slider has a DragHandler whose
target is the slider's knob, you can start dragging anywhere on the
whole Slider but you want the knob to jump to the cursor position when
the drag begins.
While we're at it, both branches of the if in onGrabChanged()
are checking that target() isn't null, so we can move that check out.
Fixes: QTBUG-74966
Change-Id: I05be11d27422b070d941b9e43d4e1157e071c3a5
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>
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This happened if you moved the mouse while doing a multitouch operation.
More specifically this caused the bug:
1. Open qtdeclarative/tests/manual/pointer/map.qml
2. Rotate the map with two fingers (Do not release fingers).
3. Move mouse (no buttons pressed).
4. Release both fingers.
5. Move mouse again (error: the draghandler has a grab and thus the map is
dragged even if no buttons are down).
This happened because if you moved the mouse while having two fingers
down, Windows would generate a *mouse*move* event with Left button or Right
button pressed (which wasn't the case on the physical device but it's
probably because of a bug in how mouse events are synthesized from touch
on Windows). This caused the QQuickMultiPointHandler to do a passive grab.
Then, when releasing the fingers it would not send a mouse release event
(just plain touch release events), so the QQuickMultiPointHandler would
keep the passive grab it had.
All subsequent mouse move events would then be dispatched to the
QQuickMultiPointHandler where it would assume that the button was pressed
until it got a release event (but button was never pressed so that
wouldn't happen). Eventually it would perform an exclusive grab, and
dragging was initiated.
Change-Id: I42b3133c5fde93c7f92f1cb28705156a69f9ad1c
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
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...and verify the centroid changes in the DragHandler autotest.
It was observable in manual tests that draw velocity vectors that
they weren't getting reset to zero after the release, after
ca7cdd71ee33f0d77eb6bf1367d2532e26155cb2.
Change-Id: I16186d36d51a567b0d653307421147264a5e6326
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>
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That is, minimumPointCount can now be set to a value > 1 to require
multiple fingers to do the dragging, or to track the displacement
of multiple fingers to adjust some value (such as the tilt of a map).
Task-number: QTBUG-68106
Change-Id: Ib35823e36deb81c8b277d3070fcc758c7c019564
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>
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... and clean up imports in examples, snippets and tests accordingly.
Change-Id: I5bbe63afd2614cdc2c1ec7d179c9acd6bc03b167
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>
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We need Handlers to receive accurate positions for stationary touch
points: that is, the last-known position from the previous touch
event. (And we hope that all actual touch-capable platforms also send
proper QPA events with correct positions for stationary points.
We assert that it's a bug if they don't.)
As explained in qtbase 7cef4b6463fdb73ff602ade64b222333dd23e46c, it's
OK to retain a copy of a QTest::QTouchEventSequence for this purpose,
so that the QMap<int, QTouchEvent::TouchPoint> previousPoints will not
be discarded between events.
We have done this in other tests, but not consistently; e.g.
468626e99a90d6ac21cb311cde05c658ccb3b781 fixed the PinchArea test.
Change-Id: I4dbe69f8dcc4b1cca30fd7ce91d7d2ecf5ec4bc3
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>
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From now on we prefer nullptr instead of 0 to clarify cases where
we are assigning or testing a pointer rather than a numeric zero.
Also, replaced cases where 0 was passed as Qt::KeyboardModifiers
with Qt::NoModifier (clang-tidy replaced them with nullptr, which
waas wrong, so it was just as well to make the tests more readable
rather than to revert those lines).
Change-Id: I4735d35e4d9f42db5216862ce091429eadc6e65d
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
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Some Pointer Handlers can perform the desired interaction using only
passive grabs. When such a handler is used to modify behavior of
another event-handling Item or Handler which needs to take the
exclusive grab, this allows them to cooperate: both can see the
updates, and neither prevents delivery of events to both.
Change-Id: I312cc301c52fcdf805245bbe0ac60fd28f92c01f
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
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Change-Id: Ib1fe267c23ea9fce9bcc0a91ed61081260338460
Reviewed-by: Liang Qi <liang.qi@qt.io>
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even if all points are accepted or grabbed. A passive grab isn't much
good if there are cases where the handler is prevented from monitoring.
This enables e.g. the PinchHandler to steal the grab when the right
number of touchpoints are present and have moved past the drag threshold,
and enables completion of a couple of autotests.
Change-Id: I78dc6fc585f80bfb3c13e0c6e757ef815fb94afe
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>
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For consistency we use QVector2D to represent relative movements in all
Pointer Handlers.
Change-Id: I23dc20c360b482a995d232e8a6d7e87d9bd8f600
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>
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This is for the sake of convention. Unfortunately (and the reason
it wasn't done this way at the outset), it may prevent us from ever
having a signal called "pressed" in this handler or its base class.
Change-Id: Iafa117410e0e33562290b87df59bc8c0085c217d
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>
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Change-Id: Ia67dd04333a7879362819e1bb2a891c1f92b7069
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
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Change-Id: I46f7e2c16b775723a08aa192845d490046231990
Reviewed-by: Jan Arve Sæther <jan-arve.saether@qt.io>
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