1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
|
#pragma once
#include "facade/SDLContext.h"
#include "types.h"
#include "util/OptionalRef.h"
#include "System.h"
namespace crepe {
class Camera;
class Button;
class Transform;
/**
* \brief Handles the processing of input events like mouse and keyboard interactions.
*
* This system processes events such as mouse clicks, mouse movement, and keyboard
* actions. It is responsible for detecting interactions with UI buttons and
* passing the corresponding events to the registered listeners.
*/
class InputSystem : public System {
public:
using System::System;
/**
* \brief Updates the system, processing all input events.
* This method processes all events and triggers corresponding actions.
*/
void update() override;
private:
//! Reference to the currently active camera.
OptionalRef<Camera> curr_cam_ref;
//! Stores the last position of the mouse when the button was pressed.
std::pair<int, int> last_mouse_down_position{INFINITY, INFINITY};
//! Stores the last mouse button pressed.
MouseButton last_mouse_button = MouseButton::NONE;
//
//! The tolerance in game units for detecting a mouse click.
const int click_tolerance = 5;
/**
* \brief Handles the mouse click event.
* \param mouse_button The mouse button involved in the click.
* \param world_mouse_x The X coordinate of the mouse in world space.
* \param world_mouse_y The Y coordinate of the mouse in world space.
*
* This method processes the mouse click event and triggers the corresponding button action.
*/
void handle_click(const MouseButton& mouse_button, const int& world_mouse_x, const int& world_mouse_y);
/**
* \brief Handles the mouse movement event.
* \param event_data The event data containing information about the mouse movement.
* \param world_mouse_x The X coordinate of the mouse in world space.
* \param world_mouse_y The Y coordinate of the mouse in world space.
*
* This method processes the mouse movement event and updates the button hover state.
*/
void handle_move(const SDLContext::EventData& event_data, const int& world_mouse_x, const int& world_mouse_y);
/**
* \brief Checks if the mouse position is inside the bounds of the button.
* \param mouse_x The X coordinate of the mouse.
* \param mouse_y The Y coordinate of the mouse.
* \param button The button to check.
* \param transform The transform component of the button.
* \return True if the mouse is inside the button, false otherwise.
*/
bool is_mouse_inside_button(const int& mouse_x, const int& mouse_y, const Button& button, const Transform& transform);
/**
* \brief Handles the button press event, calling the on_click callback if necessary.
* \param button The button being pressed.
*
* This method triggers the on_click action for the button when it is pressed.
*/
void handle_button_press(Button& button);
};
} // namespace crepe
|