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/**
* @file input.cpp
* Handles user input received from SDL.
*
* Copyright (C) 2020 Clyne Sullivan
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
#include "input.hpp"
#include "components/EventListener.hpp"
#include "components/Script.hpp"
InputSystem::InputSystem() :
isMouseDown(false) {}
/**
* Prepares the system for running.
*/
void InputSystem::configure([[maybe_unused]] entityx::EntityManager& entities,
[[maybe_unused]] entityx::EventManager& events) {}
/**
* Updates the system by checking for SDL events.
*/
void InputSystem::update(entityx::EntityManager& entities,
entityx::EventManager& events,
[[maybe_unused]] entityx::TimeDelta dt)
{
for (SDL_Event event; SDL_PollEvent(&event);) {
switch (event.type) {
case SDL_KEYUP:
if (auto key = event.key; key.repeat == 0)
events.emit<KeyUpEvent>(key.keysym);
break;
case SDL_KEYDOWN:
if (auto key = event.key; key.repeat == 0)
events.emit<KeyDownEvent>(key.keysym);
break;
case SDL_MOUSEBUTTONDOWN:
if (!isMouseDown) {
isMouseDown = true;
entities.each<EventListener>(
[&event](entityx::Entity e, EventListener& el) {
el.tryListener("MousePressed",
e.component<Scripted>()->caller,
event.button.x,
event.button.y,
event.button.button);
});
}
break;
case SDL_MOUSEBUTTONUP:
if (isMouseDown) {
isMouseDown = false;
entities.each<EventListener>(
[&event](entityx::Entity e, EventListener& el) {
el.tryListener("MouseReleased",
e.component<Scripted>()->caller,
event.button.x,
event.button.y,
event.button.button);
});
}
break;
default:
break;
}
}
}
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