Omitting stationary points from touch events is such a marginal
optimization that this code probably isn't worth maintaining.
It wasn't implemented correctly this time either, according to the
tst_QQuickMultiPointTouchArea::stationaryTouchWithChangingPressure()
test.
[ChangeLog][QtGui][QPointerEvent] We no longer attempt to avoid
delivery of stationary points within QTouchEvent: every pressed point
is now included in every TouchUpdate event.
Task-number: QTBUG-77142
Change-Id: If1fd666fb3057a17e0dffdd7ca7138693126b02b
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
In 4e400369c0 we began to send synth-mouse
events from the touch device, but in the opposite direction it was not
consistent.
Add autotests to prove that it's consistent both ways now.
Change-Id: I7df2328fef224dc1529ca5d27411cd8a5a9c8df9
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
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>
If we have a platform plugin we ask the platform to quit, and if
not we fall back to the base implementation of QCoreApplication
that sends Quit events directly.
This allows the platform to involve the rest of the system in the
process. The platform will then come back with a spontaneous quit
via QWSI::handleApplicationTermination(), which will then send
the corresponding Quit even from QGuiApplication like normal.
Task-number: QTBUG-45262
Task-number: QTBUG-33235
Task-number: QTBUG-72013
Task-number: QTBUG-59782
Change-Id: I0000aaf7192e4b905933c5da0e53901c6c88f26a
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
With the Qt6 compatibility break, it can finally be removed.
Closing windows (which might quit the application with
quitOnLastWindowClosed() true, the default) acted contrary to the
documentation of the commitDataRequest() signal, which could have
been a hint.
This removes the workaround API from the fix for QTBUG-49667 and
also removes the problematic feature that it worked around.
Change-Id: I672be58864ef062df7fb7f2a81658b92c4feedd2
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
This attribute is now on by default.
Change-Id: I7c9d2e3445d204d3450758673048d514bc9c850c
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Set HighDpiScaleFactorRoundingPolicy to PassThough
by default. This makes Qt track the system UI setting
accurately, and is overall the least confusing option.
Historically, Qt has rounded the scale factor (for example,
Windows 175% -> DPR 2) due to faulty handling of fractional
scale factors in Qt Widgets and with the native Windows
style.
Other areas of Qt such as Qt Quick have had few issues
with fractional scale factors and support this well.
Qt has never rounded the scale factor on the Android
platform.
Support for fractional scale factors in Qt Widgets and
the windows style has improved, which makes changing
the default for Qt 6 viable.
Task-number: QTBUG-83068
Change-Id: I38b60f621f95be8ebb6cb84a07d3370fec19ab92
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
The explicit paint event on QtGui and QPA level allows us to untangle
the expose event, which today has at least 3 different meanings.
It also allows us to follow the platform more closely in its semantics
of when painting can happen. On some platforms a paint can come in
before a window is exposed, e.g. to prepare the first frame. On others
a paint can come in after a window has been de-exposed, to save a
snapshot of the window for use in an application switcher or similar.
The expose keeps its semantics of being a barrier signaling that the
application can now render at will, for example in a threaded render
loop.
There are two compatibility code paths in this patch:
1. For platform plugins that do not yet report the PaintEvents
capability, QtGui will synthesize paint events on the platform's
behalf, based on the existing expose events coming from the platform.
2. For applications that do not yet implement paintEvent, QtGui will
send expose events instead, ensuring the same behavior as before.
For now none of the platform plugins deliver paint events natively,
so the first compatibility code path is always active.
Task-numnber: QTBUG-82676
Change-Id: I0fbe0d4cf451d6a1f07f5eab8d376a6c8a53ce8c
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
Having three methods with the same name doing different things is
unnecessarily confusing, so follow the standard naming convention in
Qt and call the getter of the resolve mask resolveMask, and the setter
setResolveMask. These methods were all documented as internal.
The publicly documented resolve() method that merges two fonts and
palettes based on the respective masks remains as it is, even though
'merge' would perhaps be a better name.
Change-Id: If90b1ad800834baccd1dbc38fc6b861540d6df6e
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
QtQuickTest synthetized events can have modifiers, but those modifiers
were not accessible globally, from QGuiApplication::keyboardModifiers
for instance.
eg. calling QML's TestCase::mouseClick with modifiers triggering a call
to QGuiApplication::keyboardModifiers did not give the expected result.
QtTest synthesised events can also have modifiers and those were
correctly handled by QApplication to set modifiers globally.
This fix moves the handling code from QApplication::notify to
QGuiApplicationPrivate::maybeSimulateModifiers and calls this function
from QGuiApplication::notify too.
The definite fix would be to do as suggested in the comment attached to
the moved code:
> Qt Test should not call qapp->notify(), but rather route the events
> through the proper QPA interface. This is required to properly
> generate all other events such as enter/leave etc.
Pick-to: 5.15 5.12
Change-Id: I734e5bbc82232b13828b1a1f82e06ee8eb695417
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Make sure Qt reacts correctly to DPI changes while the
application is running, also when going from “standard-dpi”
to “high-dpi” (like Windows 100% to 200%).
Call QHighDpiScaling::upateHighDpiScaling() on DPI
change and update the m_usePixelDensity flag from there.
Fixes: QTBUG-85384
Pick-to: 5.15
Change-Id: I8ca83e4eea76cc8ba701a18e1f8c535b9953918f
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
On Windows, and possibly other platforms, a touchpad can send a mouse
button press followed by an unexpected mouse move event to the same
coordinates, before sending a mouse button release, which may confuse
applications. Before the enhanced mouse event processing was added, the
code in QGuiApplication was responsible for deducing the mouse event
type and other info, and in the process performed a checking that
discarded events that did not change state. The enhanced mouse
processing code lacked this checking. This change adds an equivalent
checking to the enhanced mouse event processing.
Fixes: QTBUG-85431
Pick-to: 5.15
Change-Id: Ie3e2ae8cbf9870d465dfd2c8808942dd6fc647d2
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
Qt Quick's MultiPointTouchArea compares the delta since press against
the drag threshold to determine whether a gesture has started, for
example. Since it can be configured to handle both mouse and touch,
this needs to be done for mouse events in a similar way as it's done
in QGuiApplicationPrivate::processTouchEvent().
Storing one global cursor position is not OK for multi-mouse support,
but that's a problem for another time; so we keep using
QGuiApplicationPrivate::lastCursorPosition for now.
Amends 4e400369c0
Change-Id: I242565c4548878878a67074877468e5fde84a490
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
Change the functions to operate in float and add the
QPoint versions as overload calling them. This is
more in-line with the event accessors using float
and allows for removing some workarounds using a delta when
converting touch points.
Leave QPlatformWindow::map(To/From)Global() as is
for now and add helpers for float.
Change-Id: I2d46b8dbda8adff26539e358074b55073dc80b6f
Reviewed-by: Shawn Rutledge <shawn.rutledge@qt.io>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
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>
This is required to remove the ; from the macro with Qt 6.
Task-number: QTBUG-82978
Change-Id: I3f0b6717956ca8fa486bed9817b89dfa19f5e0e1
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
It was added in 2011 and has not seen any development since, and was
never included in the build system.
The OpenWFD use-case is covered by EGLFS, which has a dedicated
OpenWFD backend.
Change-Id: Id08c505e2d869a96255163cae2ede51b9efeb73f
Reviewed-by: Paul Olav Tvete <paul.tvete@qt.io>
We want every QInputEvent to carry a valid device pointer. It may be
some time until all QPA plugins are sending it, but it's necessary to
provide the functions for them to start doing that.
We now try to maintain the same order of arguments to all the functions.
handleTouchEvent(window, timestamp, device, the rest) was already there
(except "device" has changed type now), and is used in a lot of platform
plugins; so it seems easiest to let that set the precedent, and modify
the rest to match. We do that by adding new functions; we can deprecate
the older functions after it becomes clear that the new ones work well.
However the handleGestureEvent functions have only ever been used in
the cocoa plugin, so it's easy to change their argument order right now.
Modify tst_qwindow::tabletEvents() to test new tablet event API.
Task-number: QTBUG-46412
Change-Id: I1828b61183cf51f3a08774936156c6a91cfc9a12
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
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>
And silence those warnings in code that emits those signals.
Change-Id: Ic9013648060c9b84b59c44bb5a8c77e48f82d24f
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Many of these were generated by clazy using the new qevent-accessors check.
Change-Id: Ie17af17f50fdc9f47d7859d267c14568cc350fd0
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
Macros and the await helper function from qfunctions_winrt(_p).h are
needed in other Qt modules which use UWP APIs on desktop windows.
Task-number: QTBUG-84434
Change-Id: Ice09c11436ad151c17bdccd2c7defadd08c13925
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Rather than have a paletteChanged() signal which can be connected to for
tracking when the application palette has changed, then it is better to
use the event that is sent to all windows and the application itself.
That way it is easy for a window/widget or item that cares about the
change to the application font to catch it in the event() function.
[ChangeLog][QtGui][QGuiApplication] Deprecated paletteChanged() signal
in favor of QEvent::ApplicationPaletteChanged.
Change-Id: I95da211e30590e357007cc14d8ee266baceba7b3
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
It simplifies the API and reduces surprise to have rotation working by default.
On Android, the manifest specifies which orientations the application has
been designed to support; on iOS, it is controlled via the
UISupportedInterfaceOrientations property list key.
In addition, QWindow::contentOrientation() is another way to give
a hint to the window manager, or on iOS to directly control whether
the window's rotation is locked or not.
Task-number: QTBUG-35427
Task-number: QTBUG-38576
Task-number: QTBUG-44569
Task-number: QTBUG-51012
Task-number: QTBUG-83055
Change-Id: Ieed818497f686399db23813269af322bfdd237af
Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@qt.io>
When a change in logical DPI occurs due to the user changing the scaling
factor, the screen size in device independent pixels may change
due to High DPI choosing a different scale factor.
Factor out the commonly used code into QScreenPrivate methods
and use them from
QGuiApplicationPrivate::processScreenLogicalDotsPerInchChange().
Pick-to: 5.15
Task-number: QTBUG-76902
Task-number: QTBUG-79248
Change-Id: I241a0f52d8236a65084d501fb4d8f9faeea89c0f
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
Rather than have a fontChanged() signal which can be connected to for
tracking when the application font has changed, then it is better to
use the event that is sent to all windows and the application itself.
That way it is easy for a window/widget or item that cares about the
change to the application font to catch it in the event() function.
[ChangeLog][QtGui][QGuiApplication] Deprecated fontChanged() signal in
favor of QEvent::ApplicationFontChanged.
Change-Id: Iae8e832238fc85e385a52305bc04f16e597454b0
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>
This is required, so that QHash and QSet can hold more
than 2^32 items on 64 bit platforms.
The actual hashing functions for strings are still 32bit, this will
be changed in a follow-up commit.
Change-Id: I4372125252486075ff3a0b45ecfa818359fe103b
Reviewed-by: Mårten Nordheim <marten.nordheim@qt.io>
Conflicts:
examples/opengl/doc/src/cube.qdoc
src/corelib/global/qlibraryinfo.cpp
src/corelib/text/qbytearray_p.h
src/corelib/text/qlocale_data_p.h
src/corelib/time/qhijricalendar_data_p.h
src/corelib/time/qjalalicalendar_data_p.h
src/corelib/time/qromancalendar_data_p.h
src/network/ssl/qsslcertificate.h
src/widgets/doc/src/graphicsview.qdoc
src/widgets/widgets/qcombobox.cpp
src/widgets/widgets/qcombobox.h
tests/auto/corelib/tools/qscopeguard/tst_qscopeguard.cpp
tests/auto/widgets/widgets/qcombobox/tst_qcombobox.cpp
tests/benchmarks/corelib/io/qdiriterator/qdiriterator.pro
tests/manual/diaglib/debugproxystyle.cpp
tests/manual/diaglib/qwidgetdump.cpp
tests/manual/diaglib/qwindowdump.cpp
tests/manual/diaglib/textdump.cpp
util/locale_database/cldr2qlocalexml.py
util/locale_database/qlocalexml.py
util/locale_database/qlocalexml2cpp.py
Resolution of util/locale_database/ are based on:
https://codereview.qt-project.org/c/qt/qtbase/+/294250
and src/corelib/{text,time}/*_data_p.h were then regenerated by
running those scripts.
Updated CMakeLists.txt in each of
tests/auto/corelib/serialization/qcborstreamreader/
tests/auto/corelib/serialization/qcborvalue/
tests/auto/gui/kernel/
and generated new ones in each of
tests/auto/gui/kernel/qaddpostroutine/
tests/auto/gui/kernel/qhighdpiscaling/
tests/libfuzzer/corelib/text/qregularexpression/optimize/
tests/libfuzzer/gui/painting/qcolorspace/fromiccprofile/
tests/libfuzzer/gui/text/qtextdocument/sethtml/
tests/libfuzzer/gui/text/qtextdocument/setmarkdown/
tests/libfuzzer/gui/text/qtextlayout/beginlayout/
by running util/cmake/pro2cmake.py on their changed .pro files.
Changed target name in
tests/auto/gui/kernel/qaction/qaction.pro
tests/auto/gui/kernel/qaction/qactiongroup.pro
tests/auto/gui/kernel/qshortcut/qshortcut.pro
to ensure unique target names for CMake
Changed tst_QComboBox::currentIndex to not test the
currentIndexChanged(QString), as that one does not exist in Qt 6
anymore.
Change-Id: I9a85705484855ae1dc874a81f49d27a50b0dcff7
Currently depending if user uses QApplication
or QGuiApplication we end up in different behavior
when running post routines. For example QApplication
destructor calls post routines before stopping event dispatcher,
In case of QGuiApplication post routines are called
from QCoreApplication destructor, so no more event dispatcher.
This behavior is not consistent and creates troubles
when releasing resources of web engine.
Attached test will hang on windows with QGuiApplication,
however works fine with QApplication.
Task-number: QTBUG-79864
Change-Id: Ice05e66a467feaf3ad6addfbc14973649da8065e
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
By sending it to all top level windows it will make it possible for
non widget based controls to listen for this event if it cares about it
so it can handle translation updates as appropriate.
Task-number: QTBUG-78141
Task-number: QTBUG-82020
Change-Id: I8f35cdcccd81a199ff780c3f4f3d2c663480d638
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
Since the backend is async, the settings will not be ready to read/write
instantly as on other platforms, but only be ready after the
filesystem has been synced to the sandbox. This takes at least 250 to
500 ms. The QSettings status() or isWritable() can be used to discern when the
settings are ready for use.
This also fixes a crash in threaded wasm
Task-number: QTBUG-70002
Change-Id: I080bdb940aa8e9a126d7358b524f32477db151b6
Reviewed-by: Morten Johan Sørvig <morten.sorvig@qt.io>
The static self pointer of QGuiApplicationPrivate was not reset at
destruction (in constrast to the corresponding
QGuiApplication::self). This could cause crashes when calling Qt API
after QGuiApplication destruction.
Fixing this revealed an issue with QGuiApplication::font(), which
would assert QGuiApplicationPrivate::self. But the QApplication
autotest actually calls this function with no QApplication
instance. That autotest passes only coincidentally, since another
QApplication instance has been created and deleted already, and
the dangling self pointer of that instance was never reset.
To improve the robustness of the api, replace the assert/crash with
just a warning and return an "empty" QFont.
(The assert was added for 5.0 for QTBUG-28306 in order to give a nicer
warning when mixing QWidget and QtCore/GuiApplication. However it
never got that effect in practice, since that issue was fixed at the
same time by another, better patch for the duplicate bug QTBUG-28076).
Fixes: QTBUG-81954
Change-Id: I3fa6cad1625a3e70631b5170d53119d63492b534
Reviewed-by: Tor Arne Vestbø <tor.arne.vestbo@qt.io>
Adds an opt-in experimental DirectWrite-based font database.
This cannot be the 100% replacement for GDI unfortunately, since
quite a few font formats used on Windows are still unsupported.
But it would be good to have it as an opt-in experimental feature
since it should make it easier to solve multiple font selection
issues we have on Windows.
In order to still share the DirectWrite-specific code between
the old and new database, this introduces a common base class.
Note that the feature depends on DirectWrite 3 support (Windows 10).
Fixes: QTBUG-74917
Change-Id: Ida08ec7ef4fda9fc78622ca4297909a727390a64
Reviewed-by: Allan Sandfeld Jensen <allan.jensen@qt.io>
Read the dark mode setting and make it accessible
via native interface.
Add a command line option to set the support level.
Task-number: QTBUG-72028
Change-Id: I1e9fe296a6b1bda81512d003183038b866b67545
Reviewed-by: Oliver Wolff <oliver.wolff@qt.io>
The logic is now mostly handled in QGuiApplication, with QApplication
only dealing with the widget-specific palettes and interaction between
the style and the palette.
The application now picks up changes to the platform theme and will
re-resolve the current application palette appropriately. This also
works even if an explicit application palette has been set, in which
case any missing roles are filled in by the theme.
The palette can now also be reset back to the default application
palette that's fully based on the theme, by passing in the default
constructed palette (or any palette that doesn't have any roles set).
This is also correctly reflected in the Qt::AA_SetPalette attribute.
Conceptually this means QGuiApplication and QApplication follow the
same behavior as QWidget, where the palette falls back to a base or
inherited palette for roles that are not set, in this case the theme.
Behavior-wise this means that the default application palette of the
application does not have any roles set, but clients should not have
relied on this, nor does QWidget rely on that internally.
It also means that setting a palette on the application and then
getting it back again will not produce the same palette as set,
since the palette was resolved against the theme in the meantime.
This is the same behavior as for QWidget, and although it's a
behavior change it's one towards a more sane behavior, so we
accept it.
[ChangeLog] Application palettes are now resolved against the platform's
theme palette, the same way widget palettes are resolved against their
parents, and the application palette. This means the application palette
reflected through QGuiApplication::palette() may not be exactly the same
palette as set via QGuiApplication::setPalette().
Change-Id: I76b99fcd27285e564899548349aa2a5713e5965d
Reviewed-by: Vitaly Fanaskov <vitaly.fanaskov@qt.io>
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Shawn Rutledge
Tor Arne Vestbø
Lars Knoll
Andreas Hartmetz
Morten Johan Sørvig
Volker Hilsheimer
Nicolas Guichard
Michal Klocek
Andre de la Rocha
Friedemann Kleint
Jarek Kobus
Lars Schmertmann
Oliver Wolff
Andy Shaw
Qt Forward Merge Bot
Tor Arne Vestbø
Liang Qi
Lorn Potter
Yuhang Zhao
Eirik Aavitsland
Eskil Abrahamsen Blomfeldt