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#include "../ComponentManager.h"
#include "../api/Button.h"
#include "../api/EventManager.h"
#include "InputSystem.h"
using namespace crepe;
void InputSystem::update() {
ComponentManager & mgr = this->component_manager;
EventManager & event_mgr = EventManager::get_instance();
std::vector<SDLContext::EventData> event_list = SDLContext::get_instance().get_events();
RefVector<Button> buttons = mgr.get_components_by_type<Button>();
RefVector<Camera> cameras = mgr.get_components_by_type<Camera>();
OptionalRef<Camera> curr_cam_ref;
// Find the active camera
for (Camera & cam : cameras) {
if (!cam.active) continue;
curr_cam_ref = cam;
break;
}
if (!curr_cam_ref) return;
Camera & current_cam = curr_cam_ref;
RefVector<Transform> transform_vec
= mgr.get_components_by_id<Transform>(current_cam.game_object_id);
Transform & cam_transform = transform_vec.front().get();
int camera_origin_x
= cam_transform.position.x + current_cam.offset.x - (current_cam.viewport_size.x / 2);
int camera_origin_y
= cam_transform.position.y + current_cam.offset.y - (current_cam.viewport_size.y / 2);
for (const SDLContext::EventData & event : event_list) {
int world_mouse_x = event.mouse_position.first + camera_origin_x;
int world_mouse_y = event.mouse_position.second + camera_origin_y;
// check if the mouse is within the viewport
bool mouse_in_viewport
= !(world_mouse_x < camera_origin_x
|| world_mouse_x > camera_origin_x + current_cam.viewport_size.x
|| world_mouse_y < camera_origin_y
|| world_mouse_y > camera_origin_y + current_cam.viewport_size.y);
switch (event.event_type) {
case SDLContext::EventType::KEYDOWN:
event_mgr.queue_event<KeyPressEvent>(KeyPressEvent{
.repeat = event.key_repeat,
.key = event.key,
});
break;
case SDLContext::EventType::KEYUP:
event_mgr.queue_event<KeyReleaseEvent>(KeyReleaseEvent{
.key = event.key,
});
break;
case SDLContext::EventType::MOUSEDOWN:
if (!mouse_in_viewport) {
break;
}
event_mgr.queue_event<MousePressEvent>(MousePressEvent{
.mouse_x = world_mouse_x,
.mouse_y = world_mouse_y,
.button = event.mouse_button,
});
last_mouse_down_position = {world_mouse_x, world_mouse_y};
last_mouse_button = event.mouse_button;
break;
case SDLContext::EventType::MOUSEUP: {
if (!mouse_in_viewport) {
break;
}
event_mgr.queue_event<MouseReleaseEvent>(MouseReleaseEvent{
.mouse_x = world_mouse_x,
.mouse_y = world_mouse_y,
.button = event.mouse_button,
});
//check if its a click by checking the last button down
int delta_x = world_mouse_x - last_mouse_down_position.first;
int delta_y = world_mouse_y - last_mouse_down_position.second;
if (last_mouse_button == event.mouse_button
&& std::abs(delta_x) <= click_tolerance
&& std::abs(delta_y) <= click_tolerance) {
event_mgr.queue_event<MouseClickEvent>(MouseClickEvent{
.mouse_x = world_mouse_x,
.mouse_y = world_mouse_y,
.button = event.mouse_button,
});
handle_click(event.mouse_button, world_mouse_x, world_mouse_y);
}
} break;
case SDLContext::EventType::MOUSEMOVE:
if (!mouse_in_viewport) {
break;
}
event_mgr.queue_event<MouseMoveEvent>(MouseMoveEvent{
.mouse_x = world_mouse_x,
.mouse_y = world_mouse_y,
.rel_x = event.rel_mouse_move.first,
.rel_y = event.rel_mouse_move.second,
});
handle_move(event, world_mouse_x, world_mouse_y);
break;
case SDLContext::EventType::MOUSEWHEEL:
event_mgr.queue_event<MouseScrollEvent>(MouseScrollEvent{
.scroll_x = event.wheel_delta,
.scroll_y = 0,
.direction = event.wheel_delta,
});
break;
case SDLContext::EventType::SHUTDOWN:
event_mgr.queue_event<ShutDownEvent>(ShutDownEvent{});
break;
default:
break;
}
}
}
void InputSystem::handle_move(const SDLContext::EventData & event_data,
const int & world_mouse_x, const int & world_mouse_y) {
ComponentManager & mgr = this->component_manager;
RefVector<Button> buttons = mgr.get_components_by_type<Button>();
for (Button & button : buttons) {
RefVector<Transform> transform_vec
= mgr.get_components_by_id<Transform>(button.game_object_id);
Transform & transform(transform_vec.front().get());
bool was_hovering = button.hover;
if (button.active
&& is_mouse_inside_button(world_mouse_x, world_mouse_y, button, transform)) {
button.hover = true;
if (!was_hovering && button.on_enter) {
button.on_enter();
}
} else {
button.hover = false;
// Trigger the on_exit callback if the hover state just changed to false
if (was_hovering && button.on_exit) {
button.on_exit();
}
}
}
}
void InputSystem::handle_click(const MouseButton & mouse_button, const int & world_mouse_x,
const int & world_mouse_y) {
ComponentManager & mgr = this->component_manager;
RefVector<Button> buttons = mgr.get_components_by_type<Button>();
for (Button & button : buttons) {
RefVector<Transform> transform_vec
= mgr.get_components_by_id<Transform>(button.game_object_id);
Transform& transform(transform_vec.front().get());
if (button.active
&& is_mouse_inside_button(world_mouse_x, world_mouse_y, button, transform)) {
handle_button_press(button);
}
}
}
bool InputSystem::is_mouse_inside_button(const int & mouse_x, const int & mouse_y,
const Button & button, const Transform & transform) {
int half_width = button.width / 2;
int half_height = button.height / 2;
return mouse_x >= transform.position.x - half_width
&& mouse_x <= transform.position.x + half_width
&& mouse_y >= transform.position.y - half_height
&& mouse_y <= transform.position.y + half_height;
}
void InputSystem::handle_button_press(Button & button) {
if (button.is_toggle) {
if (!button.is_pressed && button.on_click) {
button.on_click();
}
button.is_pressed = !button.is_pressed;
} else if (button.on_click) {
button.on_click();
}
}
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