ui_keypad.h

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#pragma once
 
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
 
#include "gfx.h"
#include "touch_types.h"
 
#ifdef __cplusplus
extern "C" {
#endif

#define UI_KEYPAD_ENTRY_MAX 7

typedef enum {
    UI_KEY_7 = 0, UI_KEY_8, UI_KEY_9, UI_KEY_DEL,
    UI_KEY_4, UI_KEY_5, UI_KEY_6, UI_KEY_CLR,
    UI_KEY_1, UI_KEY_2, UI_KEY_3, UI_KEY_CANCEL,
    UI_KEY_0, UI_KEY_DOT, UI_KEY_OK,
    UI_KEY_SIGN,
    UI_KEY_COUNT
} ui_key_t;

typedef enum {
    UI_KEYPAD_NONE = 0,   
    UI_KEYPAD_OK,         
    UI_KEYPAD_CANCEL,     
} ui_keypad_result_t;

typedef struct {
    bool       open;       
    gfx_rect_t area;       
    char       title[48];  
    char       unit[6];    
    float      value;      
    float      min,        
               max;        
    int        decimals;   
    char       entry[UI_KEYPAD_ENTRY_MAX + 1];
    int        len;        
    bool       refused;    
    char       reason[64];
    bool       sign;       
    int        pressed;    
    uint8_t    press_id;   
    uint32_t   revision;
} ui_keypad_t;

void ui_keypad_open(ui_keypad_t *k, gfx_rect_t area, const char *title,
                    const char *unit, float value, float min, float max,
                    int decimals);

void ui_keypad_open_signed(ui_keypad_t *k, gfx_rect_t area, const char *title,
                           const char *unit, float value, float min,
                           float max, int decimals);
 
void ui_keypad_close(ui_keypad_t *k);

void ui_keypad_cancel_press(ui_keypad_t *k);

ui_keypad_result_t ui_keypad_event(ui_keypad_t *k, const touch_event_t *evt,
                                   float *out);

void ui_keypad_refuse(ui_keypad_t *k);

void ui_keypad_refuse_why(ui_keypad_t *k, const char *reason);

gfx_rect_t ui_keypad_key_rect(const ui_keypad_t *k, ui_key_t key);

const gfx_font_t *ui_keypad_digit_font(const ui_keypad_t *k);

const gfx_font_t *ui_keypad_word_font(const ui_keypad_t *k);

const char *ui_keypad_range(const ui_keypad_t *k, char *buf, size_t n);

void ui_keypad_render(const ui_keypad_t *k, gfx_canvas_t *c);
 
#ifdef __cplusplus
}
#endif