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Add ui::spawn helper for creating dropdown lists

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This commit is contained in:
Nikita Lisitsa 2022-03-10 12:23:23 +03:00
parent e83fef3369
commit 83df1a82ef
2 changed files with 55 additions and 0 deletions
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2
libs/ui/include/psemek/ui/selector.hpp
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@ -47,4 +47,6 @@ namespace psemek::ui
std::function<void(std::size_t)> callback_;
};
bool spawn(element * root, std::shared_ptr<selector> selector, geom::point<int, 2> const & position, std::function<void(std::size_t)> on_selected);
}

53
libs/ui/source/selector.cpp
View file

@ -1,4 +1,7 @@
#include <psemek/ui/selector.hpp>
#include <psemek/ui/screen.hpp>
#include <psemek/ui/positioner.hpp>
#include <psemek/ui/event_interceptor.hpp>
#include <psemek/geom/contains.hpp>
@ -123,5 +126,55 @@ namespace psemek::ui
callback_ = std::move(callback);
}
bool spawn(element * root, std::shared_ptr<selector> selector, geom::point<int, 2> const & position, std::function<void(std::size_t)> on_selected)
{
ui::screen * screen = find_last_parent_of_type<struct screen>(root);
if (!screen)
return false;
auto event_interceptor = std::make_shared<struct event_interceptor>();
auto positioner = std::make_shared<struct positioner>();
event_interceptor->set_child(positioner);
positioner->set_child(selector);
auto close = [event_interceptor = event_interceptor.get(), selector = selector.get()]{
auto p = dynamic_cast<struct screen *>(event_interceptor->parent());
if (p)
p->remove_child(event_interceptor);
selector->on_selected([](std::size_t){});
};
selector->on_selected([close, cb = std::move(on_selected)](std::size_t index){
close();
cb(index);
});
event_interceptor->on_mouse_click([close](ui::mouse_click const & e) -> bool {
if (e.down && (e.button == ui::mouse_button::right || e.button == ui::mouse_button::left))
{
close();
return true;
}
return false;
});
event_interceptor->on_key_press([close](key_press const & e) -> bool {
if (e.down && e.key == SDLK_ESCAPE)
{
close();
return true;
}
return false;
});
send_fake_mouse_move_event(event_interceptor.get(), true);
positioner->set_position(geom::cast<float>(position), positioner::x_align::left, positioner::y_align::top);
screen->add_child(event_interceptor, screen::x_policy::fill, screen::y_policy::fill);
return true;
}
}