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This is the same as what was done for 13ede1b9 in qtdeclarative.
Change-Id: I00c7a066954efde0e569d24c267e734c31829c5b
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>
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Fix build after internal QtQml API changes.
Change-Id: Iaeafb84f5f2d9c60b54659f27e7baa448a858c4a
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
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Change-Id: I1765ac71243de0a9bf9b49e88332faa98d1745e6
Reviewed-by: Ulf Hermann <ulf.hermann@qt.io>
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The crash was not 100% reliable and depends on the order in the hash().
Something in beginDeferred() has a side effect on deferData->bindings
and an element gets deleted. This causes a crash while iterating (++it).
Therefore we do a copy of the hash.
I added a regression test. The test did only crash for SpinBox and it did
only crash roughly half the time.
Task-number: QTBUG-71942
Change-Id: I339e0a4382f97db44f6ff2e9f07f2be7278d1e24
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
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Don't assume that declarative data (QQmlData) exists. It doesn't exist
for items that have been created outside of QML, which is the case for
those content items that are lazily created from C++, for example.
Task-number: QTBUG-66669
Change-Id: Ib18455b275034dc2aec6d2405c0c2509d39fc77d
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
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If the QML engine refuses to defer execution of a delegate (it contains
an ID), we must make sure to cancel any pending deferred execution for
the same delegate. Otherwise, we may end up overriding a custom (non-
deferred) delegate with a default (deferred) delegate.
This patch adds a new test style "identified" to tst_customization.
This style contains delegates with IDs so we can test the behavior with
IDs in base styles. Furthermore, overriding delegates is now tested
in various ways (with and without IDs in the base and custom styles) in
a separate test method. This is done by generating QML code to override
delegates with dummy Item instances with appropriate IDs and names.
Task-number: QTBUG-65341
Change-Id: Ie6dca287cb74672004d9d8f599760b9d32c3a380
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
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458eb65f7 introduced a performance regression. Before 458eb65f7, qmlbench
delegates_button.qml results were around 40 frames on a TX1. After 458eb65f,
it dropped to 32. This patch is unfortunately not able to bring it on the
original level, but at least improves the results to 37.
For QQuickText, it is extremely important that implicitWidth() gets called
before the component is completed, to avoid doing implicit size calculation
multiple times. Deferred execution caused a performance regression by creating
contentItem in "one go". We need to split the deferred execution to two parts
so that bindings get first setup, and later enabled upon completion. This way,
we utilize QQuickText's performance optimization for implicit size calculation.
Task-number: QTBUG-50992
Change-Id: I4bf00af71b6d7dbf1d4b58b00fe547c6c321f8ed
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
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In practice, deferring the execution of the delegates (until
accessed) means that the default delegate item does not get created
at all, when a custom control replaces it at construction time.
Button {
background: Rectangle { ... }
}
Before, such custom Button would never be faster than the original
one, because the default delegate was first created and then thrown
away at construction time. Originally, this was not considered a huge
problem, because the plan was to keep the default delegates so light-
weight that it wouldn't matter. However, then came the fancy styles
with shadows and effects and thus, heavier default delegates. There's
also a growing demand for more features, and the default delegates
are slowly getting heavier...
Now, after this patch, if you replace a heavy default delegate with
a light and simple custom delegate, the result is a much faster
control. For example, replacing Material style Button's background,
which has a shadow effect, with a plain Rectangle gives a ~10x boost,
because the default background with its heavy shadow effect is not
executed at all.
At the same time, deferring the execution of the default delegates
avoids troubles with asynchronous incubation, because we don't need
to destroy an object in the middle of the incubation process.
Task-number: QTBUG-50992
Change-Id: I2274bff99b9ff126d3748278d58d859222910c98
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
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