105 lines
2 KiB
C++
105 lines
2 KiB
C++
#include <psemek/sdl2/cursor.hpp>
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#include <psemek/log/log.hpp>
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#include <psemek/util/enum.hpp>
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#include <SDL2/SDL_mouse.h>
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#include <memory>
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namespace psemek::sdl2
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{
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namespace
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{
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struct cursor_deleter
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{
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void operator() (SDL_Cursor * c) const
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{
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SDL_FreeCursor(c);
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}
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};
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using cursor_ptr = std::unique_ptr<SDL_Cursor, cursor_deleter>;
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}
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struct cursor
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{
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std::unique_ptr<SDL_Cursor, cursor_deleter> cursor;
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};
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namespace
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{
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SDL_Cursor * create_system_cursor(SDL_SystemCursor id)
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{
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auto cursor = SDL_CreateSystemCursor(id);
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if (!cursor)
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log::warning() << "Failed to create system cursor: " << SDL_GetError();
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return cursor;
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}
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struct system_cursor_provider_impl
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: cursor_provider
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{
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system_cursor_provider_impl()
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{
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arrow_.cursor.reset(create_system_cursor(SDL_SYSTEM_CURSOR_ARROW));
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beam_.cursor.reset(create_system_cursor(SDL_SYSTEM_CURSOR_IBEAM));
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hand_.cursor.reset(create_system_cursor(SDL_SYSTEM_CURSOR_HAND));
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}
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cursor const & get(cursor_type type) const override
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{
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switch (type)
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{
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case cursor_type::arrow: return arrow_;
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case cursor_type::beam: return beam_;
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case cursor_type::hand: return hand_;
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}
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throw util::unknown_enum_value_exception<cursor_type>(type);
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}
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private:
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cursor arrow_;
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cursor beam_;
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cursor hand_;
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};
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}
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std::unique_ptr<cursor_provider> system_cursor_provider()
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{
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return std::make_unique<system_cursor_provider_impl>();
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}
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static std::unique_ptr<cursor_provider> current_provider;
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std::unique_ptr<cursor_provider> set_cursor_provider(std::unique_ptr<cursor_provider> new_provider)
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{
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std::swap(current_provider, new_provider);
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return new_provider;
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}
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cursor_provider const * get_cursor_provider()
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{
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static std::unique_ptr<cursor_provider> fallback;
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if (current_provider)
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return current_provider.get();
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if (!fallback)
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fallback = system_cursor_provider();
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return fallback.get();
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}
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void set_cursor(cursor_type type)
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{
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SDL_SetCursor(get_cursor_provider()->get(type).cursor.get());
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}
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}
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