touch_dev_gestures.h

/*
 * Copyright (C) 2023 Gunar Schorcht
 *
 * This file is subject to the terms and conditions of the GNU Lesser
 * General Public License v2.1. See the file LICENSE in the top level
 * directory for more details.
 */
 
#ifndef TOUCH_DEV_GESTURES_H
#define TOUCH_DEV_GESTURES_H
 
#ifdef __cplusplus
extern "C" {
#endif
 
#include <stddef.h>
#include <stdint.h>
#include <stdbool.h>
 
#include "touch_dev.h"
 
#define TOUCH_DEV_TOUCHES_MAX_NUMOF     2
 
#ifndef CONFIG_TOUCH_DEV_SWIPE_TRESH
#define CONFIG_TOUCH_DEV_SWIPE_TRESH    5
#endif
 
#ifndef CONFIG_TOUCH_DEV_PRESS_TIME_MS
#define CONFIG_TOUCH_DEV_PRESS_TIME_MS  600
#endif
 
#ifndef CONFIG_TOUCH_DEV_DOUBLE_TIME_MS
#define CONFIG_TOUCH_DEV_DOUBLE_TIME_MS 400
#endif
 
typedef enum {
    TOUCH_DEV_STATE_RELEASED,           
    TOUCH_DEV_STATE_TAPPED_SINGLE,      
    TOUCH_DEV_STATE_TAPPED_MULTIPLE,    
    TOUCH_DEV_STATE_PRESSED,            
    TOUCH_DEV_STATE_WAIT_FOR_RELEASE,   
} touch_dev_state_t;
 
typedef enum {
    TOUCH_DEV_GEST_NONE,         
    TOUCH_DEV_GEST_SINGLE_TAP,   
    TOUCH_DEV_GEST_DOUBLE_TAP,   
    TOUCH_DEV_GEST_PRESSED,      
    TOUCH_DEV_GEST_RELEASED,     
    TOUCH_DEV_GEST_MOVE,         
    TOUCH_DEV_GEST_SWIPE_LEFT,   
    TOUCH_DEV_GEST_SWIPE_RIGHT,  
    TOUCH_DEV_GEST_SWIPE_UP,     
    TOUCH_DEV_GEST_SWIPE_DOWN,   
    TOUCH_DEV_GEST_ZOOM_IN,      
    TOUCH_DEV_GEST_ZOOM_OUT,     
} touch_dev_gesture_t;
 
typedef struct {
    touch_dev_t *dev;                           
    uint32_t t_changed;                         
    uint32_t t_prev_tap;                        
    touch_t prev[TOUCH_DEV_TOUCHES_MAX_NUMOF];  
    uint8_t prev_num;                           
    touch_dev_state_t state;                    
} touch_dev_gesture_ctx_t;
 
void touch_dev_init_gesture(touch_dev_t *dev,
                            touch_dev_gesture_ctx_t *ctx);
 
touch_dev_gesture_t touch_dev_recognize_gesture(touch_dev_gesture_ctx_t *ctx,
                                                touch_t *pos);
 
#ifdef __cplusplus
}
#endif
 
#endif /* TOUCH_DEV_GESTURES_H */