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lvgl/src/lv_widgets/lv_calendar.c
Gabor Kiss-Vamosi 479851e968 : restructure to allow asserting in from too
2020-06-08 13:10:56 +02:00

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/**
* @file lv_calendar.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_calendar.h"
#if LV_USE_CALENDAR != 0
#include "../lv_misc/lv_debug.h"
#include "../lv_draw/lv_draw.h"
#include "../lv_hal/lv_hal_indev.h"
#include "../lv_misc/lv_utils.h"
#include "../lv_core/lv_indev.h"
#include "../lv_themes/lv_theme.h"
#include <string.h>
/*********************
* DEFINES
*********************/
#define LV_OBJX_NAME "lv_calendar"
/**********************
* TYPEDEFS
**********************/
enum {
DAY_DRAW_PREV_MONTH,
DAY_DRAW_ACT_MONTH,
DAY_DRAW_NEXT_MONTH,
};
typedef uint8_t day_draw_state_t;
/**********************
* STATIC PROTOTYPES
**********************/
static lv_design_res_t lv_calendar_design(lv_obj_t * calendar, const lv_area_t * clip_area, lv_design_mode_t mode);
static lv_res_t lv_calendar_signal(lv_obj_t * calendar, lv_signal_t sign, void * param);
static lv_style_list_t * lv_calendar_get_style(lv_obj_t * calendar, uint8_t part);
static bool calculate_touched_day(lv_obj_t * calendar, const lv_point_t * touched_point);
static lv_coord_t get_header_height(lv_obj_t * calendar);
static lv_coord_t get_day_names_height(lv_obj_t * calendar);
static void draw_header(lv_obj_t * calendar, const lv_area_t * mask);
static void draw_day_names(lv_obj_t * calendar, const lv_area_t * mask);
static void draw_dates(lv_obj_t * calendar, const lv_area_t * clip_area);
static uint8_t get_day_of_week(uint32_t year, uint32_t month, uint32_t day);
static bool is_highlighted(lv_obj_t * calendar, day_draw_state_t draw_state, int32_t year, int32_t month, int32_t day);
static bool is_pressed(lv_obj_t * calendar, day_draw_state_t draw_state, int32_t year, int32_t month, int32_t day);
static const char * get_day_name(lv_obj_t * calendar, uint8_t day);
static const char * get_month_name(lv_obj_t * calendar, int32_t month);
static uint8_t get_month_length(int32_t year, int32_t month);
static uint8_t is_leap_year(uint32_t year);
/**********************
* STATIC VARIABLES
**********************/
static lv_signal_cb_t ancestor_signal;
static lv_design_cb_t ancestor_design;
static const char * day_name[7] = {"Su", "Mo", "Tu", "We", "Th", "Fr", "Sa"};
static const char * month_name[12] = {"January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November", "December"
};
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
/**
* Create a calendar object
* @param par pointer to an object, it will be the parent of the new calendar
* @param copy pointer to a calendar object, if not NULL then the new object will be copied from it
* @return pointer to the created calendar
*/
lv_obj_t * lv_calendar_create(lv_obj_t * par, const lv_obj_t * copy)
{
LV_LOG_TRACE("calendar create started");
/*Create the ancestor of calendar*/
lv_obj_t * calendar = lv_obj_create(par, copy);
LV_ASSERT_MEM(calendar);
if(calendar == NULL) return NULL;
/*Allocate the calendar type specific extended data*/
lv_calendar_ext_t * ext = lv_obj_allocate_ext_attr(calendar, sizeof(lv_calendar_ext_t));
LV_ASSERT_MEM(ext);
if(ext == NULL) {
lv_obj_del(calendar);
return NULL;
}
if(ancestor_signal == NULL) ancestor_signal = lv_obj_get_signal_cb(calendar);
if(ancestor_design == NULL) ancestor_design = lv_obj_get_design_cb(calendar);
/*Initialize the allocated 'ext' */
ext->today.year = 2020;
ext->today.month = 1;
ext->today.day = 1;
ext->showed_date.year = 2020;
ext->showed_date.month = 1;
ext->showed_date.day = 1;
ext->pressed_date.year = 0;
ext->pressed_date.month = 0;
ext->pressed_date.day = 0;
ext->highlighted_dates = NULL;
ext->highlighted_dates_num = 0;
ext->day_names = NULL;
ext->month_names = NULL;
ext->btn_pressing = 0;
lv_style_list_init(&ext->style_date_nums);
lv_style_list_init(&ext->style_day_names);
lv_style_list_init(&ext->style_header);
ext->style_date_nums.skip_trans = 1;
ext->style_day_names.skip_trans = 1;
ext->style_header.skip_trans = 1;
/*The signal and design functions are not copied so set them here*/
lv_obj_set_signal_cb(calendar, lv_calendar_signal);
lv_obj_set_design_cb(calendar, lv_calendar_design);
/*Init the new calendar calendar*/
if(copy == NULL) {
lv_theme_apply(calendar, LV_THEME_CALENDAR);
lv_obj_set_size(calendar, 5 * LV_DPI / 2, 5 * LV_DPI / 2);
}
/*Copy an existing calendar*/
else {
lv_calendar_ext_t * copy_ext = lv_obj_get_ext_attr(copy);
ext->today.year = copy_ext->today.year;
ext->today.month = copy_ext->today.month;
ext->today.day = copy_ext->today.day;
ext->showed_date.year = copy_ext->showed_date.year;
ext->showed_date.month = copy_ext->showed_date.month;
ext->showed_date.day = copy_ext->showed_date.day;
ext->highlighted_dates = copy_ext->highlighted_dates;
ext->highlighted_dates_num = copy_ext->highlighted_dates_num;
ext->day_names = copy_ext->day_names;
ext->month_names = copy_ext->month_names;
ext->style_header = copy_ext->style_header;
ext->style_day_names = copy_ext->style_day_names;
/*Refresh the style with new signal function*/
// lv_obj_refresh_style(new_calendar);
}
LV_LOG_INFO("calendar created");
return calendar;
}
/*======================
* Add/remove functions
*=====================*/
/*
* New object specific "add" or "remove" functions come here
*/
/*=====================
* Setter functions
*====================*/
/**
* Set the today's date
* @param calendar pointer to a calendar object
* @param today pointer to an `lv_calendar_date_t` variable containing the date of today. The value
* will be saved it can be local variable too.
*/
void lv_calendar_set_today_date(lv_obj_t * calendar, lv_calendar_date_t * today)
{
LV_ASSERT_OBJ(calendar, LV_OBJX_NAME);
LV_ASSERT_NULL(today);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
ext->today.year = today->year;
ext->today.month = today->month;
ext->today.day = today->day;
lv_obj_invalidate(calendar);
}
/**
* Set the currently showed
* @param calendar pointer to a calendar object
* @param showed pointer to an `lv_calendar_date_t` variable containing the date to show. The value
* will be saved it can be local variable too.
*/
void lv_calendar_set_showed_date(lv_obj_t * calendar, lv_calendar_date_t * showed)
{
LV_ASSERT_OBJ(calendar, LV_OBJX_NAME);
LV_ASSERT_NULL(showed);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
ext->showed_date.year = showed->year;
ext->showed_date.month = showed->month;
ext->showed_date.day = showed->day;
lv_obj_invalidate(calendar);
}
/**
* Set the the highlighted dates
* @param calendar pointer to a calendar object
* @param highlighted pointer to an `lv_calendar_date_t` array containing the dates. ONLY A POINTER
* WILL BE SAVED! CAN'T BE LOCAL ARRAY.
* @param date_num number of dates in the array
*/
void lv_calendar_set_highlighted_dates(lv_obj_t * calendar, lv_calendar_date_t highlighted[], uint16_t date_num)
{
LV_ASSERT_OBJ(calendar, LV_OBJX_NAME);
LV_ASSERT_NULL(highlighted);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
ext->highlighted_dates = highlighted;
ext->highlighted_dates_num = date_num;
lv_obj_invalidate(calendar);
}
/**
* Set the name of the days
* @param calendar pointer to a calendar object
* @param day_names pointer to an array with the names. E.g. `const char * days[7] = {"Sun", "Mon",
* ...}` Only the pointer will be saved so this variable can't be local which will be destroyed
* later.
*/
void lv_calendar_set_day_names(lv_obj_t * calendar, const char ** day_names)
{
LV_ASSERT_OBJ(calendar, LV_OBJX_NAME);
LV_ASSERT_NULL(day_names);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
ext->day_names = day_names;
lv_obj_invalidate(calendar);
}
/**
* Set the name of the month
* @param calendar pointer to a calendar object
* @param month_names pointer to an array with the names. E.g. `const char * days[12] = {"Jan", "Feb",
* ...}` Only the pointer will be saved so this variable can't be local which will be destroyed
* later.
*/
void lv_calendar_set_month_names(lv_obj_t * calendar, const char ** month_names)
{
LV_ASSERT_OBJ(calendar, LV_OBJX_NAME);
LV_ASSERT_NULL(month_names);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
ext->month_names = month_names;
lv_obj_invalidate(calendar);
}
/*=====================
* Getter functions
*====================*/
/**
* Get the today's date
* @param calendar pointer to a calendar object
* @return return pointer to an `lv_calendar_date_t` variable containing the date of today.
*/
lv_calendar_date_t * lv_calendar_get_today_date(const lv_obj_t * calendar)
{
LV_ASSERT_OBJ(calendar, LV_OBJX_NAME);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
return &ext->today;
}
/**
* Get the currently showed
* @param calendar pointer to a calendar object
* @return pointer to an `lv_calendar_date_t` variable containing the date is being shown.
*/
lv_calendar_date_t * lv_calendar_get_showed_date(const lv_obj_t * calendar)
{
LV_ASSERT_OBJ(calendar, LV_OBJX_NAME);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
return &ext->showed_date;
}
/**
* Get the the pressed date.
* @param calendar pointer to a calendar object
* @return pointer to an `lv_calendar_date_t` variable containing the pressed date.
* `NULL` if not date pressed (e.g. the header)
*/
lv_calendar_date_t * lv_calendar_get_pressed_date(const lv_obj_t * calendar)
{
LV_ASSERT_OBJ(calendar, LV_OBJX_NAME);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
return ext->pressed_date.year != 0 ? &ext->pressed_date : NULL;
}
/**
* Get the the highlighted dates
* @param calendar pointer to a calendar object
* @return pointer to an `lv_calendar_date_t` array containing the dates.
*/
lv_calendar_date_t * lv_calendar_get_highlighted_dates(const lv_obj_t * calendar)
{
LV_ASSERT_OBJ(calendar, LV_OBJX_NAME);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
return ext->highlighted_dates;
}
/**
* Get the number of the highlighted dates
* @param calendar pointer to a calendar object
* @return number of highlighted days
*/
uint16_t lv_calendar_get_highlighted_dates_num(const lv_obj_t * calendar)
{
LV_ASSERT_OBJ(calendar, LV_OBJX_NAME);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
return ext->highlighted_dates_num;
}
/**
* Get the name of the days
* @param calendar pointer to a calendar object
* @return pointer to the array of day names
*/
const char ** lv_calendar_get_day_names(const lv_obj_t * calendar)
{
LV_ASSERT_OBJ(calendar, LV_OBJX_NAME);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
return ext->day_names;
}
/**
* Get the name of the month
* @param calendar pointer to a calendar object
* @return pointer to the array of month names
*/
const char ** lv_calendar_get_month_names(const lv_obj_t * calendar)
{
LV_ASSERT_OBJ(calendar, LV_OBJX_NAME);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
return ext->month_names;
}
/*=====================
* Other functions
*====================*/
/*
* New object specific "other" functions come here
*/
/**********************
* STATIC FUNCTIONS
**********************/
/**
* Handle the drawing related tasks of the calendars
* @param calendar pointer to an object
* @param clip_area the object will be drawn only in this area
* @param mode LV_DESIGN_COVER_CHK: only check if the object fully covers the 'mask_p' area
* (return 'true' if yes)
* LV_DESIGN_DRAW: draw the object (always return 'true')
* LV_DESIGN_DRAW_POST: drawing after every children are drawn
* @param return an element of `lv_design_res_t`
*/
static lv_design_res_t lv_calendar_design(lv_obj_t * calendar, const lv_area_t * clip_area, lv_design_mode_t mode)
{
/*Return false if the object is not covers the mask_p area*/
if(mode == LV_DESIGN_COVER_CHK) {
return ancestor_design(calendar, clip_area, mode);
}
/*Draw the object*/
else if(mode == LV_DESIGN_DRAW_MAIN) {
ancestor_design(calendar, clip_area, mode);
draw_header(calendar, clip_area);
draw_day_names(calendar, clip_area);
draw_dates(calendar, clip_area);
}
/*Post draw when the children are drawn*/
else if(mode == LV_DESIGN_DRAW_POST) {
ancestor_design(calendar, clip_area, mode);
}
return LV_DESIGN_RES_OK;
}
/**
* Signal function of the calendar
* @param calendar pointer to a calendar object
* @param sign a signal type from lv_signal_t enum
* @param param pointer to a signal specific variable
* @return LV_RES_OK: the object is not deleted in the function; LV_RES_INV: the object is deleted
*/
static lv_res_t lv_calendar_signal(lv_obj_t * calendar, lv_signal_t sign, void * param)
{
lv_res_t res;
if(sign == LV_SIGNAL_GET_STYLE) {
lv_get_style_info_t * info = param;
info->result = lv_calendar_get_style(calendar, info->part);
if(info->result != NULL) return LV_RES_OK;
else return ancestor_signal(calendar, sign, param);
return LV_RES_OK;
}
/* Include the ancient signal function */
res = ancestor_signal(calendar, sign, param);
if(res != LV_RES_OK) return res;
if(sign == LV_SIGNAL_GET_TYPE) return lv_obj_handle_get_type_signal(param, LV_OBJX_NAME);
if(sign == LV_SIGNAL_CLEANUP) {
lv_obj_clean_style_list(calendar, LV_CALENDAR_PART_HEADER);
lv_obj_clean_style_list(calendar, LV_CALENDAR_PART_DAY_NAMES);
lv_obj_clean_style_list(calendar, LV_CALENDAR_PART_DATE);
}
else if(sign == LV_SIGNAL_PRESSING) {
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
lv_area_t header_area;
lv_area_copy(&header_area, &calendar->coords);
header_area.y2 = header_area.y1 + get_header_height(calendar);
lv_indev_t * indev = lv_indev_get_act();
lv_point_t p;
lv_indev_get_point(indev, &p);
/*If the header is pressed mark an arrow as pressed*/
if(_lv_area_is_point_on(&header_area, &p, 0)) {
if(p.x < header_area.x1 + lv_area_get_width(&header_area) / 2) {
if(ext->btn_pressing != -1) lv_obj_invalidate(calendar);
ext->btn_pressing = -1;
}
else {
if(ext->btn_pressing != 1) lv_obj_invalidate(calendar);
ext->btn_pressing = 1;
}
ext->pressed_date.year = 0;
ext->pressed_date.month = 0;
ext->pressed_date.day = 0;
}
/*If a day is pressed save it*/
else if(calculate_touched_day(calendar, &p)) {
ext->btn_pressing = 0;
lv_obj_invalidate(calendar);
}
/*Else set a default state*/
else {
if(ext->btn_pressing != 0) lv_obj_invalidate(calendar);
ext->btn_pressing = 0;
ext->pressed_date.year = 0;
ext->pressed_date.month = 0;
ext->pressed_date.day = 0;
}
}
else if(sign == LV_SIGNAL_PRESS_LOST) {
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
ext->btn_pressing = 0;
ext->pressed_date.year = 0;
ext->pressed_date.month = 0;
ext->pressed_date.day = 0;
lv_obj_invalidate(calendar);
}
else if(sign == LV_SIGNAL_RELEASED) {
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
if(ext->btn_pressing < 0) {
if(ext->showed_date.month <= 1) {
ext->showed_date.month = 12;
ext->showed_date.year--;
}
else {
ext->showed_date.month--;
}
}
else if(ext->btn_pressing > 0) {
if(ext->showed_date.month >= 12) {
ext->showed_date.month = 1;
ext->showed_date.year++;
}
else {
ext->showed_date.month++;
}
}
else if(ext->pressed_date.year != 0) {
res = lv_event_send(calendar, LV_EVENT_VALUE_CHANGED, NULL);
if(res != LV_RES_OK) return res;
}
ext->btn_pressing = 0;
ext->pressed_date.year = 0;
ext->pressed_date.month = 0;
ext->pressed_date.day = 0;
lv_obj_invalidate(calendar);
}
else if(sign == LV_SIGNAL_CONTROL) {
uint8_t c = *((uint8_t *)param);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
if(c == LV_KEY_RIGHT || c == LV_KEY_UP) {
if(ext->showed_date.month >= 12) {
ext->showed_date.month = 1;
ext->showed_date.year++;
}
else {
ext->showed_date.month++;
}
lv_obj_invalidate(calendar);
}
else if(c == LV_KEY_LEFT || c == LV_KEY_DOWN) {
if(ext->showed_date.month <= 1) {
ext->showed_date.month = 12;
ext->showed_date.year--;
}
else {
ext->showed_date.month--;
}
lv_obj_invalidate(calendar);
}
}
return res;
}
/**
* Get the style descriptor of a part of the object
* @param page pointer the object
* @param part the part from `lv_calendar_part_t`. (LV_CALENDAR_PART_...)
* @return pointer to the style descriptor of the specified part
*/
static lv_style_list_t * lv_calendar_get_style(lv_obj_t * calendar, uint8_t part)
{
LV_ASSERT_OBJ(calendar, LV_OBJX_NAME);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
lv_style_list_t * style_dsc_p;
switch(part) {
case LV_CALENDAR_PART_BG:
style_dsc_p = &calendar->style_list;
break;
case LV_CALENDAR_PART_HEADER:
style_dsc_p = &ext->style_header;
break;
case LV_CALENDAR_PART_DAY_NAMES:
style_dsc_p = &ext->style_day_names;
break;
case LV_CALENDAR_PART_DATE:
style_dsc_p = &ext->style_date_nums;
break;
default:
style_dsc_p = NULL;
}
return style_dsc_p;
}
/**
* It will check if the days part of calendar is touched
* and if it is, it will calculate the day and put it in pressed_date of calendar object.
* @param calendar pointer to a calendar object
* @param pointer to a point
* @return true: days part of calendar is touched and its related date is put in pressed date
* false: the point is out of days part area.
*/
static bool calculate_touched_day(lv_obj_t * calendar, const lv_point_t * touched_point)
{
lv_area_t days_area;
lv_area_copy(&days_area, &calendar->coords);
lv_style_int_t left = lv_obj_get_style_pad_left(calendar, LV_CALENDAR_PART_DATE);
lv_style_int_t right = lv_obj_get_style_pad_right(calendar, LV_CALENDAR_PART_DATE);
lv_style_int_t top = lv_obj_get_style_pad_top(calendar, LV_CALENDAR_PART_DATE);
lv_style_int_t bottom = lv_obj_get_style_pad_bottom(calendar, LV_CALENDAR_PART_DATE);
days_area.x1 += left;
days_area.x2 -= right;
days_area.y1 = calendar->coords.y1 + get_header_height(calendar) + get_day_names_height(calendar) + top;
days_area.y2 -= bottom;
if(_lv_area_is_point_on(&days_area, touched_point, 0)) {
lv_coord_t w = (days_area.x2 - days_area.x1 + 1) / 7;
lv_coord_t h = (days_area.y2 - days_area.y1 + 1) / 6;
uint8_t x_pos = 0;
x_pos = (touched_point->x - days_area.x1) / w;
if(x_pos > 6) x_pos = 6;
uint8_t y_pos = 0;
y_pos = (touched_point->y - days_area.y1) / h;
if(y_pos > 5) y_pos = 5;
uint8_t i_pos = 0;
i_pos = (y_pos * 7) + x_pos;
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
if(i_pos < get_day_of_week(ext->showed_date.year, ext->showed_date.month, 1)) {
ext->pressed_date.year = ext->showed_date.year - (ext->showed_date.month == 1 ? 1 : 0);
ext->pressed_date.month = ext->showed_date.month == 1 ? 12 : (ext->showed_date.month - 1);
ext->pressed_date.day = get_month_length(ext->pressed_date.year, ext->pressed_date.month) -
get_day_of_week(ext->showed_date.year, ext->showed_date.month, 1) + 1 + i_pos;
}
else if(i_pos < (get_day_of_week(ext->showed_date.year, ext->showed_date.month, 1) +
get_month_length(ext->showed_date.year, ext->showed_date.month))) {
ext->pressed_date.year = ext->showed_date.year;
ext->pressed_date.month = ext->showed_date.month;
ext->pressed_date.day = i_pos + 1 - get_day_of_week(ext->showed_date.year, ext->showed_date.month, 1);
}
else if(i_pos < 42) {
ext->pressed_date.year = ext->showed_date.year + (ext->showed_date.month == 12 ? 1 : 0);
ext->pressed_date.month = ext->showed_date.month == 12 ? 1 : (ext->showed_date.month + 1);
ext->pressed_date.day = i_pos + 1 - get_day_of_week(ext->showed_date.year, ext->showed_date.month, 1) -
get_month_length(ext->showed_date.year, ext->showed_date.month);
}
return true;
}
else {
return false;
}
}
/**
* Get the height of a calendar's header based on it's style
* @param calendar point to a calendar
* @return the header's height
*/
static lv_coord_t get_header_height(lv_obj_t * calendar)
{
const lv_font_t * font = lv_obj_get_style_text_font(calendar, LV_CALENDAR_PART_HEADER);
lv_style_int_t top = lv_obj_get_style_pad_top(calendar, LV_CALENDAR_PART_HEADER);
lv_style_int_t bottom = lv_obj_get_style_pad_bottom(calendar, LV_CALENDAR_PART_HEADER);
return lv_font_get_line_height(font) + top + bottom;
}
/**
* Get the height of a calendar's day_names based on it's style
* @param calendar point to a calendar
* @return the day_names's height
*/
static lv_coord_t get_day_names_height(lv_obj_t * calendar)
{
const lv_font_t * font = lv_obj_get_style_text_font(calendar, LV_CALENDAR_PART_DAY_NAMES);
lv_style_int_t top = lv_obj_get_style_pad_top(calendar, LV_CALENDAR_PART_DAY_NAMES);
lv_style_int_t bottom = lv_obj_get_style_pad_bottom(calendar, LV_CALENDAR_PART_DAY_NAMES);
return lv_font_get_line_height(font) + top + bottom;
}
/**
* Draw the calendar header with month name and arrows
* @param calendar point to a calendar
* @param mask a mask for drawing
*/
static void draw_header(lv_obj_t * calendar, const lv_area_t * mask)
{
lv_style_int_t header_top = lv_obj_get_style_pad_top(calendar, LV_CALENDAR_PART_HEADER);
lv_style_int_t header_left = lv_obj_get_style_pad_left(calendar, LV_CALENDAR_PART_HEADER);
lv_style_int_t header_right = lv_obj_get_style_pad_right(calendar, LV_CALENDAR_PART_HEADER);
const lv_font_t * font = lv_obj_get_style_text_font(calendar, LV_CALENDAR_PART_HEADER);
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
lv_area_t header_area;
header_area.x1 = calendar->coords.x1;
header_area.x2 = calendar->coords.x2;
header_area.y1 = calendar->coords.y1 + header_top;
header_area.y2 = header_area.y1 + lv_font_get_line_height(font);
lv_draw_rect_dsc_t header_rect_dsc;
lv_draw_rect_dsc_init(&header_rect_dsc);
lv_obj_init_draw_rect_dsc(calendar, LV_CALENDAR_PART_HEADER, &header_rect_dsc);
lv_draw_rect(&header_area, mask, &header_rect_dsc);
lv_state_t state_ori = calendar->state;
/*Add the year + month name*/
char txt_buf[64];
_lv_utils_num_to_str(ext->showed_date.year, txt_buf);
txt_buf[4] = ' ';
txt_buf[5] = '\0';
strcpy(&txt_buf[5], get_month_name(calendar, ext->showed_date.month));
calendar->state = LV_STATE_DEFAULT;
lv_draw_label_dsc_t label_dsc;
lv_draw_label_dsc_init(&label_dsc);
lv_obj_init_draw_label_dsc(calendar, LV_CALENDAR_PART_HEADER, &label_dsc);
label_dsc.flag = LV_TXT_FLAG_CENTER;
lv_draw_label(&header_area, mask, &label_dsc, txt_buf, NULL);
calendar->state = state_ori; /*Restore the state*/
/*Add the left arrow*/
if(ext->btn_pressing < 0) calendar->state |= LV_STATE_PRESSED;
else calendar->state &= ~(LV_STATE_PRESSED);
header_area.x1 += header_left;
lv_draw_label_dsc_init(&label_dsc);
lv_obj_init_draw_label_dsc(calendar, LV_CALENDAR_PART_HEADER, &label_dsc);
lv_draw_label(&header_area, mask, &label_dsc, LV_SYMBOL_LEFT, NULL);
calendar->state = state_ori; /*Restore the state*/
/*Add the right arrow*/
if(ext->btn_pressing > 0) calendar->state |= LV_STATE_PRESSED;
else calendar->state &= ~(LV_STATE_PRESSED);
header_area.x1 = header_area.x2 - header_right - _lv_txt_get_width(LV_SYMBOL_RIGHT, (uint16_t)strlen(LV_SYMBOL_RIGHT),
font, 0, LV_TXT_FLAG_NONE);
lv_draw_label_dsc_init(&label_dsc);
lv_obj_init_draw_label_dsc(calendar, LV_CALENDAR_PART_HEADER, &label_dsc);
lv_draw_label(&header_area, mask, &label_dsc, LV_SYMBOL_RIGHT, NULL);
calendar->state = state_ori; /*Restore the state*/
}
/**
* Draw the day's name below the header
* @param calendar point to a calendar
* @param mask a mask for drawing
*/
static void draw_day_names(lv_obj_t * calendar, const lv_area_t * mask)
{
lv_style_int_t date_top = lv_obj_get_style_pad_top(calendar, LV_CALENDAR_PART_DATE);
lv_style_int_t date_bottom = lv_obj_get_style_pad_bottom(calendar, LV_CALENDAR_PART_DATE);
lv_style_int_t date_left = lv_obj_get_style_pad_left(calendar, LV_CALENDAR_PART_DATE);
lv_style_int_t date_right = lv_obj_get_style_pad_right(calendar, LV_CALENDAR_PART_DATE);
lv_style_int_t date_inner = lv_obj_get_style_pad_inner(calendar, LV_CALENDAR_PART_DATE);
lv_coord_t days_w = lv_obj_get_width(calendar) - date_left - date_right;
lv_coord_t box_w = (days_w - date_inner * 6) / 7;
lv_coord_t days_y1 = calendar->coords.y1 + date_top + get_header_height(calendar) + get_day_names_height(calendar);
lv_coord_t days_h = calendar->coords.y2 - days_y1 - date_bottom;
lv_coord_t box_h = (days_h - 5 * date_inner) / 6;
lv_coord_t box_size = LV_MATH_MIN(box_w, box_h);
lv_style_int_t left = lv_obj_get_style_pad_left(calendar, LV_CALENDAR_PART_DAY_NAMES);
lv_style_int_t right = lv_obj_get_style_pad_right(calendar, LV_CALENDAR_PART_DAY_NAMES);
lv_style_int_t top = lv_obj_get_style_pad_top(calendar, LV_CALENDAR_PART_DAY_NAMES);
const lv_font_t * font = lv_obj_get_style_text_font(calendar, LV_CALENDAR_PART_DAY_NAMES);
lv_coord_t w = lv_obj_get_width(calendar) - left - right;
lv_coord_t label_w = w / 6;
lv_area_t label_area;
label_area.y1 = calendar->coords.y1 + get_header_height(calendar) + top;
label_area.y2 = label_area.y1 + lv_font_get_line_height(font);
lv_draw_label_dsc_t label_dsc;
lv_draw_label_dsc_init(&label_dsc);
lv_obj_init_draw_label_dsc(calendar, LV_CALENDAR_PART_DAY_NAMES, &label_dsc);
label_dsc.flag = LV_TXT_FLAG_CENTER;
uint32_t i;
for(i = 0; i < 7; i++) {
label_area.x1 = calendar->coords.x1 + ((w - box_size) * i) / 6 + box_size / 2 - label_w / 2 + left;
label_area.x2 = label_area.x1 + label_w - 1;
lv_draw_label(&label_area, mask, &label_dsc, get_day_name(calendar, i), NULL);
}
}
/**
* Draw the date numbers in a matrix
* @param calendar point to a calendar
* @param mask a mask for drawing
*/
static void draw_dates(lv_obj_t * calendar, const lv_area_t * clip_area)
{
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
const lv_font_t * nums_font = lv_obj_get_style_text_font(calendar, LV_CALENDAR_PART_DATE);
lv_style_int_t date_top = lv_obj_get_style_pad_top(calendar, LV_CALENDAR_PART_DATE);
lv_style_int_t date_bottom = lv_obj_get_style_pad_bottom(calendar, LV_CALENDAR_PART_DATE);
lv_style_int_t date_left = lv_obj_get_style_pad_left(calendar, LV_CALENDAR_PART_DATE);
lv_style_int_t date_right = lv_obj_get_style_pad_right(calendar, LV_CALENDAR_PART_DATE);
lv_style_int_t date_inner = lv_obj_get_style_pad_inner(calendar, LV_CALENDAR_PART_DATE);
lv_coord_t days_y1 = calendar->coords.y1 + date_top + get_header_height(calendar) + get_day_names_height(calendar);
lv_coord_t days_h = calendar->coords.y2 - days_y1 - date_bottom;
/*The state changes without re-caching the styles, disable the use of cache*/
lv_state_t state_ori = calendar->state;
calendar->state = LV_STATE_DEFAULT;
lv_state_t month_state = LV_STATE_DISABLED;
uint8_t day_cnt;
lv_coord_t days_w = lv_obj_get_width(calendar) - date_left - date_right;
lv_coord_t box_w = (days_w - date_inner * 6) / 7;
lv_coord_t box_h = (days_h - 5 * date_inner) / 6;
lv_coord_t box_size = LV_MATH_MIN(box_w, box_h);
uint8_t month_start_day = get_day_of_week(ext->showed_date.year, ext->showed_date.month, 1);
day_draw_state_t draw_state;
/*If starting with the first day of the week then the previous month is not visible*/
if(month_start_day == 0) {
day_cnt = 1;
draw_state = DAY_DRAW_ACT_MONTH;
month_state = 0;
}
else {
draw_state = DAY_DRAW_PREV_MONTH;
day_cnt = get_month_length(ext->showed_date.year, ext->showed_date.month - 1); /*Length of the previous month*/
day_cnt -= month_start_day - 1; /*First visible number of the previous month*/
month_state = LV_STATE_DISABLED;
}
bool month_of_today_shown = false;
if(ext->showed_date.year == ext->today.year && ext->showed_date.month == ext->today.month) {
month_of_today_shown = true;
}
char buf[3];
/*Draw 6 weeks*/
lv_draw_rect_dsc_t rect_dsc;
lv_draw_label_dsc_t label_dsc;
lv_state_t prev_state = 0xFF;
uint32_t week;
for(week = 0; week < 6; week++) {
lv_area_t box_area;
box_area.y1 = days_y1 + ((days_h - box_size) * week) / 5;
box_area.y2 = box_area.y1 + box_size - 1;
if(box_area.y1 > clip_area->y2) {
calendar->state = state_ori;
return;
}
lv_area_t label_area;
label_area.y1 = box_area.y1 + (lv_area_get_height(&box_area) - lv_font_get_line_height(nums_font)) / 2;
label_area.y2 = label_area.y1 + lv_font_get_line_height(nums_font);
/*Draw the 7 days of a week*/
uint32_t day;
for(day = 0; day < 7; day++) {
/*The previous month is over*/
if(draw_state == DAY_DRAW_PREV_MONTH && day == month_start_day) {
draw_state = DAY_DRAW_ACT_MONTH;
day_cnt = 1;
month_state = 0;
}
/*The current month is over*/
else if(draw_state == DAY_DRAW_ACT_MONTH &&
day_cnt > get_month_length(ext->showed_date.year, ext->showed_date.month)) {
draw_state = DAY_DRAW_NEXT_MONTH;
day_cnt = 1;
month_state = LV_STATE_DISABLED;
}
if(box_area.y2 < clip_area->y1) {
day_cnt++;
continue;
}
lv_state_t day_state = month_state;
if(is_pressed(calendar, draw_state, ext->showed_date.year, ext->showed_date.month, day_cnt)) {
day_state |= LV_STATE_PRESSED;
}
if(is_highlighted(calendar, draw_state, ext->showed_date.year, ext->showed_date.month, day_cnt)) {
day_state |= LV_STATE_CHECKED;
}
if(month_of_today_shown && day_cnt == ext->today.day && draw_state == DAY_DRAW_ACT_MONTH) {
day_state |= LV_STATE_FOCUSED;
}
if(prev_state != day_state) {
lv_draw_rect_dsc_init(&rect_dsc);
lv_draw_label_dsc_init(&label_dsc);
label_dsc.flag = LV_TXT_FLAG_CENTER;
calendar->state = day_state;
lv_obj_init_draw_label_dsc(calendar, LV_CALENDAR_PART_DATE, &label_dsc);
lv_obj_init_draw_rect_dsc(calendar, LV_CALENDAR_PART_DATE, &rect_dsc);
prev_state = day_state;
}
label_area.x1 = calendar->coords.x1 + ((days_w - box_size) * day) / 6 + date_left;
label_area.x2 = label_area.x1 + box_size - 1;
box_area.x1 = label_area.x1;
box_area.x2 = label_area.x2;
lv_draw_rect(&box_area, clip_area, &rect_dsc);
/*Write the day's number*/
_lv_utils_num_to_str(day_cnt, buf);
lv_draw_label(&label_area, clip_area, &label_dsc, buf, NULL);
/*Go to the next day*/
day_cnt++;
}
}
calendar->state = state_ori;
}
/**
* Check weather a date is highlighted or not
* @param calendar pointer to a calendar object
* @param draw_state which month is drawn (previous, active, next)
* @param year a year
* @param month a month [1..12]
* @param day a day [1..31]
* @return true: highlighted
*/
static bool is_highlighted(lv_obj_t * calendar, day_draw_state_t draw_state, int32_t year, int32_t month, int32_t day)
{
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
if(draw_state == DAY_DRAW_PREV_MONTH) {
year -= month == 1 ? 1 : 0;
month = month == 1 ? 12 : month - 1;
}
else if(draw_state == DAY_DRAW_NEXT_MONTH) {
year += month == 12 ? 1 : 0;
month = month == 12 ? 1 : month + 1;
}
uint32_t i;
for(i = 0; i < ext->highlighted_dates_num; i++) {
if(ext->highlighted_dates[i].year == year && ext->highlighted_dates[i].month == month &&
ext->highlighted_dates[i].day == day) {
return true;
}
}
return false;
}
/**
* Check weather a date is highlighted or not
* @param calendar pointer to a calendar object
* @param draw_state which month is drawn (previous, active, next)
* @param year a year
* @param month a month [1..12]
* @param day a day [1..31]
* @return true: highlighted
*/
static bool is_pressed(lv_obj_t * calendar, day_draw_state_t draw_state, int32_t year, int32_t month, int32_t day)
{
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
if(draw_state == DAY_DRAW_PREV_MONTH) {
year -= month == 1 ? 1 : 0;
month = month == 1 ? 12 : month - 1;
}
else if(draw_state == DAY_DRAW_NEXT_MONTH) {
year += month == 12 ? 1 : 0;
month = month == 12 ? 1 : month + 1;
}
if(year == ext->pressed_date.year && month == ext->pressed_date.month && day == ext->pressed_date.day) return true;
else return false;
}
/**
* Get the day name
* @param calendar pointer to a calendar object
* @param day a day in [0..6]
* @return
*/
static const char * get_day_name(lv_obj_t * calendar, uint8_t day)
{
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
if(ext->day_names)
return ext->day_names[day];
else
return day_name[day];
}
/**
* Get the month name
* @param calendar pointer to a calendar object
* @param month a month. The range is basically [1..12] but [-11..1] is also supported to handle
* previous year
* @return
*/
static const char * get_month_name(lv_obj_t * calendar, int32_t month)
{
month--; /*Range of months id [1..12] but range of indexes is [0..11]*/
if(month < 0) month = 12 + month;
lv_calendar_ext_t * ext = lv_obj_get_ext_attr(calendar);
if(ext->month_names)
return ext->month_names[month];
else
return month_name[month];
}
/**
* Get the number of days in a month
* @param year a year
* @param month a month. The range is basically [1..12] but [-11..1] is also supported to handle
* previous year
* @return [28..31]
*/
static uint8_t get_month_length(int32_t year, int32_t month)
{
month--; /*Range of months id [1..12] but range of indexes is [0..11]*/
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
* @param day a day
* @return [0..6] which means [Sun..Sat]
*/
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;
uint32_t day_of_week = (day + (31 * (month - 2 + 12 * a) / 12) + b + (b / 4) - (b / 100) + (b / 400)) % 7;
return day_of_week;
}
#endif
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