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/**
* @file lv_sw.c
*
*/
/*********************
* INCLUDES
*********************/
#include "lv_switch_private.h"
#include "../../core/lv_obj_private.h"
#include "../../core/lv_obj_class_private.h"
#if LV_USE_SWITCH != 0
#include "../../misc/lv_assert.h"
#include "../../misc/lv_math.h"
#include "../../misc/lv_anim_private.h"
#include "../../indev/lv_indev.h"
#include "../../display/lv_display.h"
/*********************
* DEFINES
*********************/
#define MY_CLASS (&lv_switch_class)
#define LV_SWITCH_IS_ANIMATING(sw) (((sw)->anim_state) != LV_SWITCH_ANIM_STATE_INV)
/** Switch animation start value. (Not the real value of the switch just indicates process animation)*/
#define LV_SWITCH_ANIM_STATE_START 0
/** Switch animation end value. (Not the real value of the switch just indicates process animation)*/
#define LV_SWITCH_ANIM_STATE_END 256
/** Mark no animation is in progress*/
#define LV_SWITCH_ANIM_STATE_INV -1
/**********************
* TYPEDEFS
**********************/
/**********************
* STATIC PROTOTYPES
**********************/
static void lv_switch_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
static void lv_switch_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
static void lv_switch_event(const lv_obj_class_t * class_p, lv_event_t * e);
static void draw_main(lv_event_t * e);
static void lv_switch_anim_exec_cb(void * sw, int32_t value);
static void lv_switch_trigger_anim(lv_obj_t * obj);
static void lv_switch_anim_completed(lv_anim_t * a);
/**********************
* STATIC VARIABLES
**********************/
const lv_obj_class_t lv_switch_class = {
.constructor_cb = lv_switch_constructor,
.destructor_cb = lv_switch_destructor,
.event_cb = lv_switch_event,
.width_def = (4 * LV_DPI_DEF) / 10,
.height_def = (4 * LV_DPI_DEF) / 17,
.group_def = LV_OBJ_CLASS_GROUP_DEF_TRUE,
.instance_size = sizeof(lv_switch_t),
.base_class = &lv_obj_class,
.name = "switch",
};
/**********************
* MACROS
**********************/
/**********************
* GLOBAL FUNCTIONS
**********************/
lv_obj_t * lv_switch_create(lv_obj_t * parent)
{
LV_LOG_INFO("begin");
lv_obj_t * obj = lv_obj_class_create_obj(MY_CLASS, parent);
lv_obj_class_init_obj(obj);
return obj;
}
/**********************
* STATIC FUNCTIONS
**********************/
static void lv_switch_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
{
LV_UNUSED(class_p);
LV_TRACE_OBJ_CREATE("begin");
lv_switch_t * sw = (lv_switch_t *)obj;
sw->anim_state = LV_SWITCH_ANIM_STATE_INV;
lv_obj_remove_flag(obj, LV_OBJ_FLAG_SCROLLABLE);
lv_obj_add_flag(obj, LV_OBJ_FLAG_CHECKABLE);
lv_obj_add_flag(obj, LV_OBJ_FLAG_SCROLL_ON_FOCUS);
LV_TRACE_OBJ_CREATE("finished");
}
static void lv_switch_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
{
LV_UNUSED(class_p);
lv_switch_t * sw = (lv_switch_t *)obj;
lv_anim_delete(sw, NULL);
}
static void lv_switch_event(const lv_obj_class_t * class_p, lv_event_t * e)
{
LV_UNUSED(class_p);
lv_result_t res;
/*Call the ancestor's event handler*/
res = lv_obj_event_base(MY_CLASS, e);
if(res != LV_RESULT_OK) return;
lv_event_code_t code = lv_event_get_code(e);
lv_obj_t * obj = lv_event_get_current_target(e);
if(code == LV_EVENT_REFR_EXT_DRAW_SIZE) {
int32_t knob_left = lv_obj_get_style_pad_left(obj, LV_PART_KNOB);
int32_t knob_right = lv_obj_get_style_pad_right(obj, LV_PART_KNOB);
int32_t knob_top = lv_obj_get_style_pad_top(obj, LV_PART_KNOB);
int32_t knob_bottom = lv_obj_get_style_pad_bottom(obj, LV_PART_KNOB);
/*The smaller size is the knob diameter*/
int32_t knob_size = LV_MAX4(knob_left, knob_right, knob_bottom, knob_top);
knob_size += LV_SWITCH_KNOB_EXT_AREA_CORRECTION;
knob_size += lv_obj_calculate_ext_draw_size(obj, LV_PART_KNOB);
int32_t * s = lv_event_get_param(e);
*s = LV_MAX(*s, knob_size);
*s = LV_MAX(*s, lv_obj_calculate_ext_draw_size(obj, LV_PART_INDICATOR));
}
else if(code == LV_EVENT_VALUE_CHANGED) {
lv_switch_trigger_anim(obj);
lv_obj_invalidate(obj);
}
else if(code == LV_EVENT_DRAW_MAIN) {
draw_main(e);
}
}
static void draw_main(lv_event_t * e)
{
lv_obj_t * obj = lv_event_get_current_target(e);
lv_switch_t * sw = (lv_switch_t *)obj;
lv_layer_t * layer = lv_event_get_layer(e);
/*Draw the indicator*/
lv_area_t indic_area;
/*Exclude background's padding*/
lv_obj_get_content_coords(obj, &indic_area);
lv_draw_rect_dsc_t draw_indic_dsc;
lv_draw_rect_dsc_init(&draw_indic_dsc);
lv_obj_init_draw_rect_dsc(obj, LV_PART_INDICATOR, &draw_indic_dsc);
lv_draw_rect(layer, &draw_indic_dsc, &indic_area);
/*Draw the knob*/
int32_t anim_value_x = 0;
int32_t knob_size = lv_obj_get_height(obj);
int32_t anim_length = lv_area_get_width(&obj->coords) - knob_size;
if(LV_SWITCH_IS_ANIMATING(sw)) {
/* Use the animation's coordinate */
anim_value_x = (anim_length * sw->anim_state) / LV_SWITCH_ANIM_STATE_END;
}
else {
/* Use LV_STATE_CHECKED to decide the coordinate */
bool chk = lv_obj_get_state(obj) & LV_STATE_CHECKED;
anim_value_x = chk ? anim_length : 0;
}
if(LV_BASE_DIR_RTL == lv_obj_get_style_base_dir(obj, LV_PART_MAIN)) {
anim_value_x = anim_length - anim_value_x;
}
lv_area_t knob_area;
lv_area_copy(&knob_area, &obj->coords);
knob_area.x1 += anim_value_x;
knob_area.x2 = knob_area.x1 + (knob_size > 0 ? knob_size - 1 : 0);
int32_t knob_left = lv_obj_get_style_pad_left(obj, LV_PART_KNOB);
int32_t knob_right = lv_obj_get_style_pad_right(obj, LV_PART_KNOB);
int32_t knob_top = lv_obj_get_style_pad_top(obj, LV_PART_KNOB);
int32_t knob_bottom = lv_obj_get_style_pad_bottom(obj, LV_PART_KNOB);
/*Apply the paddings on the knob area*/
knob_area.x1 -= knob_left;
knob_area.x2 += knob_right;
knob_area.y1 -= knob_top;
knob_area.y2 += knob_bottom;
lv_draw_rect_dsc_t knob_rect_dsc;
lv_draw_rect_dsc_init(&knob_rect_dsc);
lv_obj_init_draw_rect_dsc(obj, LV_PART_KNOB, &knob_rect_dsc);
lv_draw_rect(layer, &knob_rect_dsc, &knob_area);
}
static void lv_switch_anim_exec_cb(void * var, int32_t value)
{
lv_switch_t * sw = var;
sw->anim_state = value;
lv_obj_invalidate((lv_obj_t *)sw);
}
/**
* Resets the switch's animation state to "no animation in progress".
*/
static void lv_switch_anim_completed(lv_anim_t * a)
{
lv_switch_t * sw = a->var;
sw->anim_state = LV_SWITCH_ANIM_STATE_INV;
lv_obj_invalidate((lv_obj_t *)sw);
}
/**
* Starts an animation for the switch knob. if the anim_time style property is greater than 0
* @param obj the switch to animate
*/
static void lv_switch_trigger_anim(lv_obj_t * obj)
{
LV_ASSERT_OBJ(obj, MY_CLASS);
lv_switch_t * sw = (lv_switch_t *)obj;
uint32_t anim_dur_full = lv_obj_get_style_anim_duration(obj, LV_PART_MAIN);
if(anim_dur_full > 0) {
bool chk = lv_obj_get_state(obj) & LV_STATE_CHECKED;
int32_t anim_start;
int32_t anim_end;
/*No animation in progress -> simply set the values*/
if(sw->anim_state == LV_SWITCH_ANIM_STATE_INV) {
anim_start = chk ? LV_SWITCH_ANIM_STATE_START : LV_SWITCH_ANIM_STATE_END;
anim_end = chk ? LV_SWITCH_ANIM_STATE_END : LV_SWITCH_ANIM_STATE_START;
}
/*Animation in progress. Start from the animation end value*/
else {
anim_start = sw->anim_state;
anim_end = chk ? LV_SWITCH_ANIM_STATE_END : LV_SWITCH_ANIM_STATE_START;
}
/*Calculate actual animation duration*/
uint32_t anim_dur = (anim_dur_full * LV_ABS(anim_start - anim_end)) / LV_SWITCH_ANIM_STATE_END;
/*Stop the previous animation if it exists*/
lv_anim_delete(sw, NULL);
lv_anim_t a;
lv_anim_init(&a);
lv_anim_set_var(&a, sw);
lv_anim_set_exec_cb(&a, lv_switch_anim_exec_cb);
lv_anim_set_values(&a, anim_start, anim_end);
lv_anim_set_completed_cb(&a, lv_switch_anim_completed);
lv_anim_set_duration(&a, anim_dur);
lv_anim_start(&a);
}
}
#endif
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