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This change makes all Qt Quick Controls 2 imports match the current
Qt minor version, which is 12 as of this patch.
It also updates all other Qt Quick imports to match.
This will also make future version bumps easier as all version numbers
in existing code/docs will match.
The following commands were used to verify that no old versions remain:
for i in `seq 0 11`; do git grep "import QtGraphicalEffects.*1.$i$"; done
for i in `seq 0 11`; do git grep "import QtQuick 2.$i$"; done
for i in `seq 0 11`; do git grep "import QtQuick.Layouts 1.$i$"; done
for i in `seq 0 5`; do git grep "import QtQuick.Controls.*2.$i$"; done
for i in `seq 0 11`; do git grep "import QtQuick.Templates 2.$i as T$"; done
[ChangeLog] From Qt 5.12 onwards, all import versions in
Qt Quick Controls 2 follow the same minor version as Qt's
minor version number. For example, the import version for Qt 5.12 is:
"import QtQuick.Controls 2.12".
Change-Id: I6d87573f20912e041d9c3b7c773cc7bf7b152ec3
Fixes: QTBUG-71095
Reviewed-by: Simon Hausmann <simon.hausmann@qt.io>
Reviewed-by: Shawn Rutledge <shawn.rutledge@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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