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Only the computation of the model needs to be done in the evaluation scope for it

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Otherwise any change in any of the properties of the delegate will cause
the model to be reset.
This commit is contained in:
Olivier Goffart 2020-09-04 15:35:49 +02:00
parent c8fa3354be
commit f5aeb9ba60
4 changed files with 44 additions and 42 deletions
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9
api/sixtyfps-cpp/include/sixtyfps_properties.h
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@ -124,7 +124,7 @@ struct PropertyTracker
}
template<typename F>
void evaluate(const F &f) const {
auto evaluate(const F &f) const -> std::enable_if_t<std::is_same_v<decltype(f()), void>> {
cbindgen_private::sixtyfps_property_tracker_evaluate(
&inner,
[](void *f){ (*reinterpret_cast<const F*>(f))(); },
@ -132,6 +132,13 @@ struct PropertyTracker
);
}
template<typename F>
auto evaluate(const F &f) const -> std::enable_if_t<!std::is_same_v<decltype(f()), void>, decltype(f())> {
decltype(f()) result;
this->evaluate([&] { result = f(); } );
return result;
}
private:
cbindgen_private::PropertyTrackerOpaque inner;
};