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C++ two way bindings

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This commit is contained in:
Olivier Goffart 2020-09-25 15:21:22 +02:00
parent cc3ac5fbed
commit abe24e2e9e
5 changed files with 149 additions and 46 deletions
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4
api/sixtyfps-cpp/include/sixtyfps.h
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@ -201,9 +201,8 @@ inline KeyEventResult process_key_event(ComponentRef component, int64_t focus_it
return comp.vtable->key_event(comp, event, window);
};
}
} else {
return KeyEventResult::EventIgnored;
}
return KeyEventResult::EventIgnored;
}
template<typename GetDynamic>
@ -247,6 +246,7 @@ inline FocusEventResult process_focus_event(ComponentRef component, int64_t &foc
return FocusEventResult::FocusItemNotFound;
}
}
return FocusEventResult::FocusItemNotFound;
}
}

36
api/sixtyfps-cpp/include/sixtyfps_properties.h
View file

@ -9,6 +9,7 @@
LICENSE END */
#pragma once
#include <string_view>
#include <memory>
namespace sixtyfps {
namespace cbindgen_private {
@ -41,7 +42,7 @@ struct Property
void set(const T &value) const
{
this->value = value;
cbindgen_private::sixtyfps_property_set_changed(&inner);
cbindgen_private::sixtyfps_property_set_changed(&inner, &this->value);
}
const T &get() const
@ -58,7 +59,8 @@ struct Property
[](void *user_data, void *value) {
*reinterpret_cast<T *>(value) = (*reinterpret_cast<F *>(user_data))();
},
new F(binding), [](void *user_data) { delete reinterpret_cast<F *>(user_data); });
new F(binding), [](void *user_data) { delete reinterpret_cast<F *>(user_data); },
nullptr);
}
inline void set_animated_value(const T &value,
@ -69,6 +71,36 @@ struct Property
bool is_dirty() const { return cbindgen_private::sixtyfps_property_is_dirty(&inner); }
static void link_two_way(Property<T> *p1, Property<T> *p2) {
auto value = p2->get();
cbindgen_private::PropertyHandleOpaque handle{};
if ((p2->inner._0 & 0b10) == 0b10) {
std::swap(handle,p2->inner);
}
auto common_property = std::make_shared<Property<T>>(handle, std::move(value));
struct TwoWayBinding {
std::shared_ptr<Property<T>> common_property;
};
auto del_fn = [](void *user_data) { delete reinterpret_cast<TwoWayBinding *>(user_data); };
auto call_fn = [](void *user_data, void *value) {
*reinterpret_cast<T *>(value) =
reinterpret_cast<TwoWayBinding *>(user_data)->common_property->get();
};
auto intercept_fn = [] (void *user_data, const void *value) {
reinterpret_cast<TwoWayBinding *>(user_data)->common_property->set(
*reinterpret_cast<const T *>(value));
return true;
};
cbindgen_private::sixtyfps_property_set_binding(&p1->inner, call_fn,
new TwoWayBinding{common_property}, del_fn, intercept_fn);
cbindgen_private::sixtyfps_property_set_binding(&p2->inner, call_fn,
new TwoWayBinding{common_property}, del_fn, intercept_fn);
}
/// Internal (private) constructor used by link_two_way
explicit Property(cbindgen_private::PropertyHandleOpaque inner, T value)
: inner(inner), value(std::move(value)) {}
private:
cbindgen_private::PropertyHandleOpaque inner;
mutable T value {};