lvgl_cpp/lvgl/extra/widgets/calendar/lv_calendar.c

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2023-03-14 11:57:25 +00:00
/**
* @file lv_calendar.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_calendar.h"
#include "lvgl.h"
#if LV_USE_CALENDAR
#include "../../../misc/lv_assert.h"
/*********************
* DEFINES
*********************/
#define LV_CALENDAR_CTRL_TODAY LV_BTNMATRIX_CTRL_CUSTOM_1
#define LV_CALENDAR_CTRL_HIGHLIGHT LV_BTNMATRIX_CTRL_CUSTOM_2
#define MY_CLASS &lv_calendar_class
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void lv_calendar_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
static void draw_part_begin_event_cb(lv_event_t * e);
static uint8_t get_day_of_week(uint32_t year, uint32_t month, uint32_t day);
static uint8_t get_month_length(int32_t year, int32_t month);
static uint8_t is_leap_year(uint32_t year);
static void highlight_update(lv_obj_t * calendar);
/**********************
* STATIC VARIABLES
**********************/
const lv_obj_class_t lv_calendar_class = {
.constructor_cb = lv_calendar_constructor,
.width_def = (LV_DPI_DEF * 3) / 2,
.height_def = (LV_DPI_DEF * 3) / 2,
.group_def = LV_OBJ_CLASS_GROUP_DEF_TRUE,
.instance_size = sizeof(lv_calendar_t),
.base_class = &lv_obj_class
};
static const char * day_names_def[7] = LV_CALENDAR_DEFAULT_DAY_NAMES;
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
lv_obj_t * lv_calendar_create(lv_obj_t * parent)
{
LV_LOG_INFO("begin");
lv_obj_t * obj = lv_obj_class_create_obj(&lv_calendar_class, parent);
lv_obj_class_init_obj(obj);
return obj;
}
/*=====================
* Setter functions
*====================*/
void lv_calendar_set_day_names(lv_obj_t * obj, const char * day_names[])
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_calendar_t * calendar = (lv_calendar_t *)obj;
uint32_t i;
for(i = 0; i < 7; i++) {
calendar->map[i] = day_names[i];
}
lv_obj_invalidate(obj);
}
void lv_calendar_set_today_date(lv_obj_t * obj, uint32_t year, uint32_t month, uint32_t day)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_calendar_t * calendar = (lv_calendar_t *)obj;
calendar->today.year = year;
calendar->today.month = month;
calendar->today.day = day;
highlight_update(obj);
}
void lv_calendar_set_highlighted_dates(lv_obj_t * obj, lv_calendar_date_t highlighted[], uint16_t date_num)
{
LV_ASSERT_NULL(highlighted);
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_calendar_t * calendar = (lv_calendar_t *)obj;
calendar->highlighted_dates = highlighted;
calendar->highlighted_dates_num = date_num;
highlight_update(obj);
}
void lv_calendar_set_showed_date(lv_obj_t * obj, uint32_t year, uint32_t month)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_calendar_t * calendar = (lv_calendar_t *)obj;
calendar->showed_date.year = year;
calendar->showed_date.month = month;
calendar->showed_date.day = 1;
lv_calendar_date_t d;
d.year = calendar->showed_date.year;
d.month = calendar->showed_date.month;
d.day = calendar->showed_date.day;
uint8_t i;
/*Remove the disabled state but revert it for day names*/
lv_btnmatrix_clear_btn_ctrl_all(calendar->btnm, LV_BTNMATRIX_CTRL_DISABLED);
for(i = 0; i < 7; i++) {
lv_btnmatrix_set_btn_ctrl(calendar->btnm, i, LV_BTNMATRIX_CTRL_DISABLED);
}
uint8_t act_mo_len = get_month_length(d.year, d.month);
uint8_t day_first = get_day_of_week(d.year, d.month, 1);
uint8_t c;
for(i = day_first, c = 1; i < act_mo_len + day_first; i++, c++) {
lv_snprintf(calendar->nums[i], sizeof(calendar->nums[0]), "%d", c);
}
uint8_t prev_mo_len = get_month_length(d.year, d.month - 1);
for(i = 0, c = prev_mo_len - day_first + 1; i < day_first; i++, c++) {
lv_snprintf(calendar->nums[i], sizeof(calendar->nums[0]), "%d", c);
lv_btnmatrix_set_btn_ctrl(calendar->btnm, i + 7, LV_BTNMATRIX_CTRL_DISABLED);
}
for(i = day_first + act_mo_len, c = 1; i < 6 * 7; i++, c++) {
lv_snprintf(calendar->nums[i], sizeof(calendar->nums[0]), "%d", c);
lv_btnmatrix_set_btn_ctrl(calendar->btnm, i + 7, LV_BTNMATRIX_CTRL_DISABLED);
}
highlight_update(obj);
/*Reset the focused button if the days changes*/
if(lv_btnmatrix_get_selected_btn(calendar->btnm) != LV_BTNMATRIX_BTN_NONE) {
lv_btnmatrix_set_selected_btn(calendar->btnm, day_first + 7);
}
lv_obj_invalidate(obj);
/* The children of the calendar are probably headers.
* Notify them to let the headers updated to the new date*/
uint32_t child_cnt = lv_obj_get_child_cnt(obj);
for(i = 0; i < child_cnt; i++) {
lv_obj_t * child = lv_obj_get_child(obj, i);
if(child == calendar->btnm) continue;
lv_event_send(child, LV_EVENT_VALUE_CHANGED, obj);
}
}
/*=====================
* Getter functions
*====================*/
lv_obj_t * lv_calendar_get_btnmatrix(const lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
const lv_calendar_t * calendar = (lv_calendar_t *)obj;
return calendar->btnm;
}
const lv_calendar_date_t * lv_calendar_get_today_date(const lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
const lv_calendar_t * calendar = (lv_calendar_t *)obj;
return &calendar->today;
}
const lv_calendar_date_t * lv_calendar_get_showed_date(const lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
const lv_calendar_t * calendar = (lv_calendar_t *)obj;
return &calendar->showed_date;
}
lv_calendar_date_t * lv_calendar_get_highlighted_dates(const lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_calendar_t * calendar = (lv_calendar_t *)obj;
return calendar->highlighted_dates;
}
uint16_t lv_calendar_get_highlighted_dates_num(const lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_calendar_t * calendar = (lv_calendar_t *)obj;
return calendar->highlighted_dates_num;
}
lv_res_t lv_calendar_get_pressed_date(const lv_obj_t * obj, lv_calendar_date_t * date)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_calendar_t * calendar = (lv_calendar_t *)obj;
uint16_t d = lv_btnmatrix_get_selected_btn(calendar->btnm);
if(d == LV_BTNMATRIX_BTN_NONE) {
date->year = 0;
date->month = 0;
date->day = 0;
return LV_RES_INV;
}
const char * txt = lv_btnmatrix_get_btn_text(calendar->btnm, lv_btnmatrix_get_selected_btn(calendar->btnm));
if(txt[1] == 0) date->day = txt[0] - '0';
else date->day = (txt[0] - '0') * 10 + (txt[1] - '0');
date->year = calendar->showed_date.year;
date->month = calendar->showed_date.month;
return LV_RES_OK;
}
/**********************
* STATIC FUNCTIONS
**********************/
static void lv_calendar_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
{
LV_UNUSED(class_p);
lv_calendar_t * calendar = (lv_calendar_t *)obj;
/*Initialize the allocated 'ext'*/
calendar->today.year = 2020;
calendar->today.month = 1;
calendar->today.day = 1;
calendar->showed_date.year = 2020;
calendar->showed_date.month = 1;
calendar->showed_date.day = 1;
calendar->highlighted_dates = NULL;
calendar->highlighted_dates_num = 0;
lv_memset_00(calendar->nums, sizeof(calendar->nums));
uint8_t i;
uint8_t j = 0;
for(i = 0; i < 8 * 7; i++) {
/*Every 8th string is "\n"*/
if(i != 0 && (i + 1) % 8 == 0) {
calendar->map[i] = "\n";
}
else if(i < 8) {
calendar->map[i] = day_names_def[i];
}
else {
calendar->nums[j][0] = 'x';
calendar->map[i] = calendar->nums[j];
j++;
}
}
calendar->map[8 * 7 - 1] = "";
calendar->btnm = lv_btnmatrix_create(obj);
lv_btnmatrix_set_map(calendar->btnm, calendar->map);
lv_btnmatrix_set_btn_ctrl_all(calendar->btnm, LV_BTNMATRIX_CTRL_CLICK_TRIG | LV_BTNMATRIX_CTRL_NO_REPEAT);
lv_obj_add_event_cb(calendar->btnm, draw_part_begin_event_cb, LV_EVENT_DRAW_PART_BEGIN, NULL);
lv_obj_set_width(calendar->btnm, lv_pct(100));
lv_obj_set_flex_flow(obj, LV_FLEX_FLOW_COLUMN);
lv_obj_set_flex_grow(calendar->btnm, 1);
lv_calendar_set_showed_date(obj, calendar->showed_date.year, calendar->showed_date.month);
lv_calendar_set_today_date(obj, calendar->today.year, calendar->today.month, calendar->today.day);
lv_obj_add_flag(calendar->btnm, LV_OBJ_FLAG_EVENT_BUBBLE);
}
static void draw_part_begin_event_cb(lv_event_t * e)
{
lv_obj_t * obj = lv_event_get_target(e);
lv_obj_draw_part_dsc_t * dsc = lv_event_get_param(e);
if(dsc->part == LV_PART_ITEMS) {
/*Day name styles*/
if(dsc->id < 7) {
dsc->rect_dsc->bg_opa = LV_OPA_TRANSP;
dsc->rect_dsc->border_opa = LV_OPA_TRANSP;
}
else if(lv_btnmatrix_has_btn_ctrl(obj, dsc->id, LV_BTNMATRIX_CTRL_DISABLED)) {
dsc->rect_dsc->bg_opa = LV_OPA_TRANSP;
dsc->rect_dsc->border_opa = LV_OPA_TRANSP;
dsc->label_dsc->color = lv_palette_main(LV_PALETTE_GREY);
}
if(lv_btnmatrix_has_btn_ctrl(obj, dsc->id, LV_CALENDAR_CTRL_HIGHLIGHT)) {
dsc->rect_dsc->bg_opa = LV_OPA_40;
dsc->rect_dsc->bg_color = lv_theme_get_color_primary(obj);
if(lv_btnmatrix_get_selected_btn(obj) == dsc->id) {
dsc->rect_dsc->bg_opa = LV_OPA_70;
}
}
if(lv_btnmatrix_has_btn_ctrl(obj, dsc->id, LV_CALENDAR_CTRL_TODAY)) {
dsc->rect_dsc->border_opa = LV_OPA_COVER;
dsc->rect_dsc->border_color = lv_theme_get_color_primary(obj);
dsc->rect_dsc->border_width += 1;
}
}
}
/**
* Get the number of days in a month
* @param year a year
* @param month a month. The range is basically [1..12] but [-11..0] or [13..24] is also
* supported to handle next/prev. year
* @return [28..31]
*/
static uint8_t get_month_length(int32_t year, int32_t month)
{
month--;
if(month < 0) {
year--; /*Already in the previous year (won't be less then -12 to skip a whole year)*/
month = 12 + month; /*`month` is negative, the result will be < 12*/
}
if(month >= 12) {
year++;
month -= 12;
}
/*month == 1 is february*/
return (month == 1) ? (28 + is_leap_year(year)) : 31 - month % 7 % 2;
}
/**
* Tells whether a year is leap year or not
* @param year a year
* @return 0: not leap year; 1: leap year
*/
static uint8_t is_leap_year(uint32_t year)
{
return (year % 4) || ((year % 100 == 0) && (year % 400)) ? 0 : 1;
}
/**
* Get the day of the week
* @param year a year
* @param month a month [1..12]
* @param day a day [1..32]
* @return [0..6] which means [Sun..Sat] or [Mon..Sun] depending on LV_CALENDAR_WEEK_STARTS_MONDAY
*/
static uint8_t get_day_of_week(uint32_t year, uint32_t month, uint32_t day)
{
uint32_t a = month < 3 ? 1 : 0;
uint32_t b = year - a;
#if LV_CALENDAR_WEEK_STARTS_MONDAY
uint32_t day_of_week = (day + (31 * (month - 2 + 12 * a) / 12) + b + (b / 4) - (b / 100) + (b / 400) - 1) % 7;
#else
uint32_t day_of_week = (day + (31 * (month - 2 + 12 * a) / 12) + b + (b / 4) - (b / 100) + (b / 400)) % 7;
#endif
return day_of_week ;
}
static void highlight_update(lv_obj_t * obj)
{
lv_calendar_t * calendar = (lv_calendar_t *)obj;
uint16_t i;
/*Clear all kind of selection*/
lv_btnmatrix_clear_btn_ctrl_all(calendar->btnm, LV_CALENDAR_CTRL_TODAY | LV_CALENDAR_CTRL_HIGHLIGHT);
uint8_t day_first = get_day_of_week(calendar->showed_date.year, calendar->showed_date.month, 1);
if(calendar->highlighted_dates) {
for(i = 0; i < calendar->highlighted_dates_num; i++) {
if(calendar->highlighted_dates[i].year == calendar->showed_date.year &&
calendar->highlighted_dates[i].month == calendar->showed_date.month) {
lv_btnmatrix_set_btn_ctrl(calendar->btnm, calendar->highlighted_dates[i].day - 1 + day_first + 7,
LV_CALENDAR_CTRL_HIGHLIGHT);
}
}
}
if(calendar->showed_date.year == calendar->today.year && calendar->showed_date.month == calendar->today.month) {
lv_btnmatrix_set_btn_ctrl(calendar->btnm, calendar->today.day - 1 + day_first + 7, LV_CALENDAR_CTRL_TODAY);
}
}
#endif /*LV_USE_CALENDAR*/