278 lines
8.5 KiB
C
278 lines
8.5 KiB
C
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/**
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* @file lv_sw.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_switch.h"
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#if LV_USE_SWITCH != 0
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#include "../misc/lv_assert.h"
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#include "../misc/lv_math.h"
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#include "../misc/lv_anim.h"
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#include "../core/lv_indev.h"
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#include "../core/lv_disp.h"
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#include "lv_img.h"
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/*********************
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* DEFINES
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*********************/
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#define MY_CLASS &lv_switch_class
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#define LV_SWITCH_IS_ANIMATING(sw) (((sw)->anim_state) != LV_SWITCH_ANIM_STATE_INV)
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/** Switch animation start value. (Not the real value of the switch just indicates process animation)*/
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#define LV_SWITCH_ANIM_STATE_START 0
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/** Switch animation end value. (Not the real value of the switch just indicates process animation)*/
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#define LV_SWITCH_ANIM_STATE_END 256
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/** Mark no animation is in progress*/
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#define LV_SWITCH_ANIM_STATE_INV -1
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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_switch_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
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static void lv_switch_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
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static void lv_switch_event(const lv_obj_class_t * class_p, lv_event_t * e);
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static void draw_main(lv_event_t * e);
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static void lv_switch_anim_exec_cb(void * sw, int32_t value);
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static void lv_switch_trigger_anim(lv_obj_t * obj);
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static void lv_switch_anim_ready(lv_anim_t * a);
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/**********************
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* STATIC VARIABLES
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**********************/
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const lv_obj_class_t lv_switch_class = {
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.constructor_cb = lv_switch_constructor,
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.destructor_cb = lv_switch_destructor,
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.event_cb = lv_switch_event,
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.width_def = (4 * LV_DPI_DEF) / 10,
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.height_def = (4 * LV_DPI_DEF) / 17,
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.group_def = LV_OBJ_CLASS_GROUP_DEF_TRUE,
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.instance_size = sizeof(lv_switch_t),
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.base_class = &lv_obj_class
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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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lv_obj_t * lv_switch_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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* STATIC FUNCTIONS
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**********************/
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static void lv_switch_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_TRACE_OBJ_CREATE("begin");
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lv_switch_t * sw = (lv_switch_t *)obj;
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sw->anim_state = LV_SWITCH_ANIM_STATE_INV;
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lv_obj_clear_flag(obj, LV_OBJ_FLAG_SCROLLABLE);
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lv_obj_add_flag(obj, LV_OBJ_FLAG_CHECKABLE);
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lv_obj_add_flag(obj, LV_OBJ_FLAG_SCROLL_ON_FOCUS);
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LV_TRACE_OBJ_CREATE("finished");
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}
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static void lv_switch_destructor(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_switch_t * sw = (lv_switch_t *)obj;
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lv_anim_del(sw, NULL);
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}
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static void lv_switch_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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res = lv_obj_event_base(MY_CLASS, e);
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if(res != LV_RES_OK) return;
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lv_event_code_t code = lv_event_get_code(e);
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lv_obj_t * obj = lv_event_get_target(e);
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if(code == LV_EVENT_REFR_EXT_DRAW_SIZE) {
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lv_coord_t knob_left = lv_obj_get_style_pad_left(obj, LV_PART_KNOB);
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lv_coord_t knob_right = lv_obj_get_style_pad_right(obj, LV_PART_KNOB);
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lv_coord_t knob_top = lv_obj_get_style_pad_top(obj, LV_PART_KNOB);
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lv_coord_t knob_bottom = lv_obj_get_style_pad_bottom(obj, LV_PART_KNOB);
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/*The smaller size is the knob diameter*/
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lv_coord_t knob_size = LV_MAX4(knob_left, knob_right, knob_bottom, knob_top);
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knob_size += _LV_SWITCH_KNOB_EXT_AREA_CORRECTION;
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knob_size += lv_obj_calculate_ext_draw_size(obj, LV_PART_KNOB);
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lv_coord_t * s = lv_event_get_param(e);
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*s = LV_MAX(*s, knob_size);
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*s = LV_MAX(*s, lv_obj_calculate_ext_draw_size(obj, LV_PART_INDICATOR));
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}
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else if(code == LV_EVENT_VALUE_CHANGED) {
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lv_switch_trigger_anim(obj);
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lv_obj_invalidate(obj);
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}
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else if(code == LV_EVENT_DRAW_MAIN) {
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draw_main(e);
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}
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}
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static void draw_main(lv_event_t * e)
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{
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lv_obj_t * obj = lv_event_get_target(e);
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lv_switch_t * sw = (lv_switch_t *)obj;
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lv_draw_ctx_t * draw_ctx = lv_event_get_draw_ctx(e);
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/*Calculate the indicator area*/
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lv_coord_t bg_left = lv_obj_get_style_pad_left(obj, LV_PART_MAIN);
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lv_coord_t bg_right = lv_obj_get_style_pad_right(obj, LV_PART_MAIN);
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lv_coord_t bg_top = lv_obj_get_style_pad_top(obj, LV_PART_MAIN);
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lv_coord_t bg_bottom = lv_obj_get_style_pad_bottom(obj, LV_PART_MAIN);
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/*Draw the indicator*/
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/*Respect the background's padding*/
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lv_area_t indic_area;
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lv_area_copy(&indic_area, &obj->coords);
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indic_area.x1 += bg_left;
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indic_area.x2 -= bg_right;
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indic_area.y1 += bg_top;
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indic_area.y2 -= bg_bottom;
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lv_draw_rect_dsc_t draw_indic_dsc;
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lv_draw_rect_dsc_init(&draw_indic_dsc);
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lv_obj_init_draw_rect_dsc(obj, LV_PART_INDICATOR, &draw_indic_dsc);
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lv_draw_rect(draw_ctx, &draw_indic_dsc, &indic_area);
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/*Draw the knob*/
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lv_coord_t anim_value_x = 0;
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lv_coord_t knob_size = lv_obj_get_height(obj);
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lv_coord_t anim_length = lv_area_get_width(&obj->coords) - knob_size;
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if(LV_SWITCH_IS_ANIMATING(sw)) {
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/* Use the animation's coordinate */
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anim_value_x = (anim_length * sw->anim_state) / LV_SWITCH_ANIM_STATE_END;
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}
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else {
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/* Use LV_STATE_CHECKED to decide the coordinate */
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bool chk = lv_obj_get_state(obj) & LV_STATE_CHECKED;
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anim_value_x = chk ? anim_length : 0;
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}
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if(LV_BASE_DIR_RTL == lv_obj_get_style_base_dir(obj, LV_PART_MAIN)) {
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anim_value_x = anim_length - anim_value_x;
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}
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lv_area_t knob_area;
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knob_area.x1 = obj->coords.x1 + anim_value_x;
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knob_area.x2 = knob_area.x1 + knob_size;
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knob_area.y1 = obj->coords.y1;
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knob_area.y2 = obj->coords.y2;
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lv_coord_t knob_left = lv_obj_get_style_pad_left(obj, LV_PART_KNOB);
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lv_coord_t knob_right = lv_obj_get_style_pad_right(obj, LV_PART_KNOB);
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lv_coord_t knob_top = lv_obj_get_style_pad_top(obj, LV_PART_KNOB);
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lv_coord_t knob_bottom = lv_obj_get_style_pad_bottom(obj, LV_PART_KNOB);
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/*Apply the paddings on the knob area*/
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knob_area.x1 -= knob_left;
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knob_area.x2 += knob_right;
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knob_area.y1 -= knob_top;
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knob_area.y2 += knob_bottom;
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lv_draw_rect_dsc_t knob_rect_dsc;
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lv_draw_rect_dsc_init(&knob_rect_dsc);
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lv_obj_init_draw_rect_dsc(obj, LV_PART_KNOB, &knob_rect_dsc);
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lv_draw_rect(draw_ctx, &knob_rect_dsc, &knob_area);
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}
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static void lv_switch_anim_exec_cb(void * var, int32_t value)
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{
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lv_switch_t * sw = var;
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sw->anim_state = value;
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lv_obj_invalidate((lv_obj_t *)sw);
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}
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/**
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* Resets the switch's animation state to "no animation in progress".
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*/
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static void lv_switch_anim_ready(lv_anim_t * a)
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{
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lv_switch_t * sw = a->var;
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sw->anim_state = LV_SWITCH_ANIM_STATE_INV;
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lv_obj_invalidate((lv_obj_t *)sw);
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}
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/**
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* Starts an animation for the switch knob. if the anim_time style property is greater than 0
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* @param obj the switch to animate
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*/
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static void lv_switch_trigger_anim(lv_obj_t * obj)
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{
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LV_ASSERT_OBJ(obj, MY_CLASS);
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lv_switch_t * sw = (lv_switch_t *)obj;
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uint32_t anim_dur_full = lv_obj_get_style_anim_time(obj, LV_PART_MAIN);
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if(anim_dur_full > 0) {
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bool chk = lv_obj_get_state(obj) & LV_STATE_CHECKED;
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int32_t anim_start;
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int32_t anim_end;
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/*No animation in progress -> simply set the values*/
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if(sw->anim_state == LV_SWITCH_ANIM_STATE_INV) {
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anim_start = chk ? LV_SWITCH_ANIM_STATE_START : LV_SWITCH_ANIM_STATE_END;
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anim_end = chk ? LV_SWITCH_ANIM_STATE_END : LV_SWITCH_ANIM_STATE_START;
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}
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/*Animation in progress. Start from the animation end value*/
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else {
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anim_start = sw->anim_state;
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anim_end = chk ? LV_SWITCH_ANIM_STATE_END : LV_SWITCH_ANIM_STATE_START;
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}
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/*Calculate actual animation duration*/
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uint32_t anim_dur = (anim_dur_full * LV_ABS(anim_start - anim_end)) / LV_SWITCH_ANIM_STATE_END;
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/*Stop the previous animation if it exists*/
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lv_anim_del(sw, NULL);
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lv_anim_t a;
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lv_anim_init(&a);
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lv_anim_set_var(&a, sw);
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lv_anim_set_exec_cb(&a, lv_switch_anim_exec_cb);
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lv_anim_set_values(&a, anim_start, anim_end);
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lv_anim_set_ready_cb(&a, lv_switch_anim_ready);
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lv_anim_set_time(&a, anim_dur);
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lv_anim_start(&a);
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}
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}
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#endif
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