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RetroArch/menu/menu_input.h

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/* RetroArch - A frontend for libretro.
* Copyright (C) 2010-2014 - Hans-Kristian Arntzen
* Copyright (C) 2011-2017 - Daniel De Matteis
* Copyright (C) 2016-2019 - Brad Parker
*
* RetroArch 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 Found-
* ation, either version 3 of the License, or (at your option) any later version.
*
* RetroArch 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 RetroArch.
* If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _MENU_INPUT_H
#define _MENU_INPUT_H
#include <stdint.h>
#include <compat/strl.h>
#include <retro_common_api.h>
#include <libretro.h>
#include "menu_defines.h"
#include "../input/input_types.h"
#include "../input/input_driver.h"
#include "../gfx/gfx_display.h"
#include "../performance_counters.h"
RETRO_BEGIN_DECLS
/* Mouse wheel tilt actions repeat at a very high
* frequency - we ignore any input that occurs
* with a period less than MENU_INPUT_HORIZ_WHEEL_DELAY */
#define MENU_INPUT_HORIZ_WHEEL_DELAY 250000 /* 250 ms */
/* Press directions are triggered as a pulse train.
* Pulse period starts at MENU_INPUT_PRESS_DIRECTION_DELAY_MAX,
* and decreases to MENU_INPUT_PRESS_DIRECTION_DELAY_MIN as
* the start/current delta offset increases from
* MENU_INPUT_DPI_THRESHOLD_PRESS_DIRECTION_MIN to
* MENU_INPUT_DPI_THRESHOLD_PRESS_DIRECTION_MAX */
#define MENU_INPUT_PRESS_DIRECTION_DELAY_MIN 100000 /* 100 ms */
#define MENU_INPUT_PRESS_DIRECTION_DELAY_MAX 500000 /* 500 ms */
#define MENU_INPUT_HIDE_CURSOR_DELAY 4000000 /* 4 seconds */
#define MENU_INPUT_PRESS_TIME_SHORT 200000 /* 200 ms */
#define MENU_INPUT_PRESS_TIME_LONG 1000000 /* 1 second */
/* (Anything less than 'short' is considered a tap) */
/* Swipe gestures must be completed within a duration
* of MENU_INPUT_SWIPE_TIMEOUT ms (helps to minimise
* unwanted input if user 'zones out' and meanders on
* a touchscreen) */
#define MENU_INPUT_SWIPE_TIMEOUT 500000 /* 500 ms */
/* Standard behaviour (on Android, at least) is to stop
* scrolling when the user touches the screen. To prevent
* jerky stop/start scrolling, we wait MENU_INPUT_Y_ACCEL_RESET_DELAY
* ms before resetting y acceleration after a stationary
* pointer down event is detected */
#define MENU_INPUT_Y_ACCEL_RESET_DELAY 50000 /* 50 ms */
#define MENU_INPUT_Y_ACCEL_DECAY_FACTOR 0.96f
/* Pointer is considered stationary if dx/dy remain
* below (display DPI) * MENU_INPUT_DPI_THRESHOLD_DRAG */
#define MENU_INPUT_DPI_THRESHOLD_DRAG 0.1f
/* Press direction detection:
* While holding the pointer down, a press in a
* specific direction (up, down, left, right) will
* be detected if:
* - Current delta (i.e. from start to current) in
* press direction is greater than
* (display DPI) * MENU_INPUT_DPI_THRESHOLD_PRESS_DIRECTION_MIN
* - Current delta in perpendicular axis is less than
* (display DPI) * MENU_INPUT_DPI_THRESHOLD_PRESS_DIRECTION_TANGENT
* Press direction repeat rate is proportional to the current
* delta in press direction.
* Note: 'Tangent' is technically not the correct word here,
* but the alternatives look silly, and the actual meaning
* is transparent... */
#define MENU_INPUT_DPI_THRESHOLD_PRESS_DIRECTION_MIN 0.5f
#define MENU_INPUT_DPI_THRESHOLD_PRESS_DIRECTION_MAX 1.4f
#define MENU_INPUT_DPI_THRESHOLD_PRESS_DIRECTION_TANGENT 0.35f
/* Swipe detection:
* A gesture will register as a swipe if:
* - Final start/current delta in swipe direction is
* greater than (display DPI) * MENU_INPUT_DPI_THRESHOLD_SWIPE
* - Maximum start/current delta in all other directions is
* less than (display DPI) * MENU_INPUT_DPI_THRESHOLD_SWIPE_TANGENT
* - Pointer was held for less than MENU_INPUT_SWIPE_TIMEOUT ms */
#define MENU_INPUT_DPI_THRESHOLD_SWIPE 0.55f
#define MENU_INPUT_DPI_THRESHOLD_SWIPE_TANGENT 0.45f
#define MENU_MAX_BUTTONS 219
#define MENU_MAX_AXES 32
#define MENU_MAX_HATS 4
#define MENU_MAX_MBUTTONS 32 /* Enough to cover largest libretro constant*/
enum menu_pointer_type
{
MENU_POINTER_DISABLED = 0,
MENU_POINTER_MOUSE,
MENU_POINTER_TOUCHSCREEN
};
enum menu_input_mouse_hw_id
{
MENU_MOUSE_X_AXIS = 0,
MENU_MOUSE_Y_AXIS,
MENU_MOUSE_LEFT_BUTTON,
MENU_MOUSE_RIGHT_BUTTON,
MENU_MOUSE_WHEEL_UP,
MENU_MOUSE_WHEEL_DOWN,
MENU_MOUSE_HORIZ_WHEEL_UP,
MENU_MOUSE_HORIZ_WHEEL_DOWN
};
enum menu_input_pointer_press_direction
{
MENU_INPUT_PRESS_DIRECTION_NONE = 0,
MENU_INPUT_PRESS_DIRECTION_UP,
MENU_INPUT_PRESS_DIRECTION_DOWN,
MENU_INPUT_PRESS_DIRECTION_LEFT,
MENU_INPUT_PRESS_DIRECTION_RIGHT
};
enum menu_input_pointer_gesture
{
MENU_INPUT_GESTURE_NONE = 0,
MENU_INPUT_GESTURE_TAP,
MENU_INPUT_GESTURE_SHORT_PRESS,
MENU_INPUT_GESTURE_LONG_PRESS,
MENU_INPUT_GESTURE_SWIPE_UP,
MENU_INPUT_GESTURE_SWIPE_DOWN,
MENU_INPUT_GESTURE_SWIPE_LEFT,
MENU_INPUT_GESTURE_SWIPE_RIGHT
};
struct menu_bind_state_port
{
int16_t axes[MENU_MAX_AXES];
uint16_t hats[MENU_MAX_HATS];
bool mouse_buttons[MENU_MAX_MBUTTONS];
bool buttons[MENU_MAX_BUTTONS];
bool keys[RETROK_LAST];
};
struct menu_bind_axis_state
{
/* Default axis state. */
int16_t rested_axes[MENU_MAX_AXES];
/* Locked axis state. If we configured an axis,
* avoid having the same axis state trigger something again right away. */
int16_t locked_axes[MENU_MAX_AXES];
};
struct menu_bind_state
{
rarch_timer_t timer_timeout;
rarch_timer_t timer_hold;
struct retro_keybind *output;
struct retro_keybind buffer;
struct menu_bind_state_port state[MAX_USERS];
struct menu_bind_axis_state axis_state[MAX_USERS];
unsigned begin;
unsigned last;
unsigned order;
unsigned user;
unsigned port;
bool skip;
};
/* Defines set of (abstracted) inputs/states
* common to mouse + touchscreen hardware */
typedef struct menu_input_pointer_hw_state
{
int16_t x;
int16_t y;
bool active;
bool select_pressed;
bool cancel_pressed;
bool up_pressed;
bool down_pressed;
bool left_pressed;
bool right_pressed;
} menu_input_pointer_hw_state_t;
typedef struct menu_input_pointer
{
retro_time_t press_duration; /* int64_t alignment */
/**
* NOTE: menu drivers typically set y_accel to zero
* manually when populating entries.
**/
float y_accel;
enum menu_pointer_type type;
enum menu_input_pointer_press_direction press_direction;
int16_t x;
int16_t y;
int16_t dx;
int16_t dy;
bool active;
bool pressed;
bool dragged;
} menu_input_pointer_t;
typedef struct menu_input
{
menu_input_pointer_t pointer; /* retro_time_t alignment */
unsigned ptr;
bool select_inhibit;
bool cancel_inhibit;
} menu_input_t;
typedef struct key_desc
{
/* libretro key id */
unsigned key;
/* description */
char desc[32];
} key_desc_t;
typedef struct menu_input_ctx_line
{
const char *label;
const char *label_setting;
unsigned type;
unsigned idx;
input_keyboard_line_complete_t cb;
} menu_input_ctx_line_t;
/**
* Copy parameters from the global menu_input_state to a menu_input_pointer_t
* in order to provide access to all pointer device parameters.
*
* @param copy_target menu_input_pointer_t struct where values will be copied
**/
void menu_input_get_pointer_state(menu_input_pointer_t *copy_target);
bool menu_input_dialog_start(menu_input_ctx_line_t *line);
const char *menu_input_dialog_get_buffer(void);
bool menu_input_dialog_start_search(void);
bool menu_input_dialog_get_display_kb(void);
void menu_input_dialog_end(void);
/* TODO/FIXME - public global variables */
extern struct key_desc key_descriptors[RARCH_MAX_KEYS];
RETRO_END_DECLS
#endif
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