220 lines
6.6 KiB
C
220 lines
6.6 KiB
C
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/**
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* @file lv_led.c
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*
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*/
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/*********************
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* INCLUDES
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*********************/
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#include "lv_led.h"
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#if LV_USE_LED
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#include "../../../misc/lv_assert.h"
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/*********************
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* DEFINES
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*********************/
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#define MY_CLASS &lv_led_class
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/**********************
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* TYPEDEFS
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**********************/
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/**********************
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* STATIC PROTOTYPES
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**********************/
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static void lv_led_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
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static void lv_led_event(const lv_obj_class_t * class_p, lv_event_t * e);
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/**********************
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* STATIC VARIABLES
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**********************/
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const lv_obj_class_t lv_led_class = {
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.base_class = &lv_obj_class,
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.constructor_cb = lv_led_constructor,
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.width_def = LV_DPI_DEF / 5,
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.height_def = LV_DPI_DEF / 5,
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.event_cb = lv_led_event,
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.instance_size = sizeof(lv_led_t),
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};
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/**********************
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* MACROS
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**********************/
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/**********************
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* GLOBAL FUNCTIONS
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**********************/
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/**
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* Create a led object
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* @param parent pointer to an object, it will be the parent of the new led
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* @return pointer to the created led
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*/
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lv_obj_t * lv_led_create(lv_obj_t * parent)
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{
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LV_LOG_INFO("begin");
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lv_obj_t * obj = lv_obj_class_create_obj(MY_CLASS, parent);
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lv_obj_class_init_obj(obj);
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return obj;
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}
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/*=====================
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* Setter functions
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*====================*/
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/**
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* Set the color of the LED
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* @param led pointer to a LED object
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* @param color the color of the LED
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*/
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void lv_led_set_color(lv_obj_t * obj, lv_color_t color)
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{
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LV_ASSERT_OBJ(obj, MY_CLASS);
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lv_led_t * led = (lv_led_t *)obj;
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led->color = color;
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lv_obj_invalidate(obj);
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}
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/**
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* Set the brightness of a LED object
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* @param led pointer to a LED object
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* @param bright LV_LED_BRIGHT_MIN (max. dark) ... LV_LED_BRIGHT_MAX (max. light)
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*/
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void lv_led_set_brightness(lv_obj_t * obj, uint8_t bright)
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{
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LV_ASSERT_OBJ(obj, MY_CLASS);
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lv_led_t * led = (lv_led_t *)obj;
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if(led->bright == bright) return;
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led->bright = LV_CLAMP(LV_LED_BRIGHT_MIN, bright, LV_LED_BRIGHT_MAX);
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/*Invalidate the object there fore it will be redrawn*/
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lv_obj_invalidate(obj);
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}
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/**
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* Light on a LED
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* @param led pointer to a LED object
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*/
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void lv_led_on(lv_obj_t * led)
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{
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lv_led_set_brightness(led, LV_LED_BRIGHT_MAX);
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}
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/**
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* Light off a LED
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* @param led pointer to a LED object
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*/
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void lv_led_off(lv_obj_t * led)
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{
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lv_led_set_brightness(led, LV_LED_BRIGHT_MIN);
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}
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/**
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* Toggle the state of a LED
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* @param led pointer to a LED object
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*/
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void lv_led_toggle(lv_obj_t * obj)
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{
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uint8_t bright = lv_led_get_brightness(obj);
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if(bright > (LV_LED_BRIGHT_MIN + LV_LED_BRIGHT_MAX) >> 1)
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lv_led_off(obj);
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else
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lv_led_on(obj);
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}
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/*=====================
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* Getter functions
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*====================*/
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/**
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* Get the brightness of a LEd object
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* @param led pointer to LED object
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* @return bright 0 (max. dark) ... 255 (max. light)
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*/
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uint8_t lv_led_get_brightness(const lv_obj_t * obj)
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{
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LV_ASSERT_OBJ(obj, MY_CLASS);
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lv_led_t * led = (lv_led_t *)obj;
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return led->bright;
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}
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/**********************
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* STATIC FUNCTIONS
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**********************/
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static void lv_led_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
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{
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LV_UNUSED(class_p);
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lv_led_t * led = (lv_led_t *)obj;
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led->color = lv_theme_get_color_primary(obj);
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led->bright = LV_LED_BRIGHT_MAX;
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}
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static void lv_led_event(const lv_obj_class_t * class_p, lv_event_t * e)
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{
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LV_UNUSED(class_p);
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lv_res_t res;
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/* Call the ancestor's event handler */
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lv_event_code_t code = lv_event_get_code(e);
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if(code != LV_EVENT_DRAW_MAIN && code != LV_EVENT_DRAW_MAIN_END) {
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res = lv_obj_event_base(MY_CLASS, e);
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if(res != LV_RES_OK) return;
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}
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lv_obj_t * obj = lv_event_get_target(e);
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if(code == LV_EVENT_DRAW_MAIN) {
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/*Make darker colors in a temporary style according to the brightness*/
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lv_led_t * led = (lv_led_t *)obj;
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lv_draw_rect_dsc_t rect_dsc;
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lv_draw_rect_dsc_init(&rect_dsc);
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lv_obj_init_draw_rect_dsc(obj, LV_PART_MAIN, &rect_dsc);
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/*Use the original colors brightness to modify color->led*/
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rect_dsc.bg_grad.stops[0].color = lv_color_mix(led->color, lv_color_black(),
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lv_color_brightness(rect_dsc.bg_grad.stops[0].color));
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rect_dsc.bg_grad.stops[1].color = lv_color_mix(led->color, lv_color_black(),
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lv_color_brightness(rect_dsc.bg_grad.stops[1].color));
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rect_dsc.shadow_color = lv_color_mix(led->color, lv_color_black(), lv_color_brightness(rect_dsc.shadow_color));
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rect_dsc.border_color = lv_color_mix(led->color, lv_color_black(), lv_color_brightness(rect_dsc.border_color));
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rect_dsc.outline_color = lv_color_mix(led->color, lv_color_black(), lv_color_brightness(rect_dsc.outline_color));
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/*Mix. the color with black proportionally with brightness*/
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rect_dsc.bg_grad.stops[0].color = lv_color_mix(rect_dsc.bg_grad.stops[0].color, lv_color_black(), led->bright);
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rect_dsc.bg_grad.stops[1].color = lv_color_mix(rect_dsc.bg_grad.stops[1].color, lv_color_black(), led->bright);
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rect_dsc.border_color = lv_color_mix(rect_dsc.border_color, lv_color_black(), led->bright);
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rect_dsc.shadow_color = lv_color_mix(rect_dsc.shadow_color, lv_color_black(), led->bright);
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rect_dsc.outline_color = lv_color_mix(rect_dsc.outline_color, lv_color_black(), led->bright);
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/*Set the current shadow width according to brightness proportionally between LV_LED_BRIGHT_OFF
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* and LV_LED_BRIGHT_ON*/
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rect_dsc.shadow_width = ((led->bright - LV_LED_BRIGHT_MIN) * rect_dsc.shadow_width) /
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(LV_LED_BRIGHT_MAX - LV_LED_BRIGHT_MIN);
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rect_dsc.shadow_spread = ((led->bright - LV_LED_BRIGHT_MIN) * rect_dsc.shadow_spread) /
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(LV_LED_BRIGHT_MAX - LV_LED_BRIGHT_MIN);
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lv_draw_ctx_t * draw_ctx = lv_event_get_draw_ctx(e);
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lv_obj_draw_part_dsc_t part_draw_dsc;
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lv_obj_draw_dsc_init(&part_draw_dsc, draw_ctx);
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part_draw_dsc.draw_area = &obj->coords;
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part_draw_dsc.class_p = MY_CLASS;
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part_draw_dsc.type = LV_LED_DRAW_PART_RECTANGLE;
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part_draw_dsc.rect_dsc = &rect_dsc;
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part_draw_dsc.part = LV_PART_MAIN;
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lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
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lv_draw_rect(draw_ctx, &rect_dsc, &obj->coords);
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lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc);
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}
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}
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#endif
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