From dd27c3530432ea0b09f01e604bf577f31d8ef841 Mon Sep 17 00:00:00 2001 From: jacqueline Date: Thu, 1 Jun 2023 15:41:47 +1000 Subject: convert lvgl from submodule to a plain old directory --- lib/lvgl | 1 - lib/lvgl/src/widgets/lv_arc.c | 844 ++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 844 insertions(+), 1 deletion(-) delete mode 160000 lib/lvgl create mode 100644 lib/lvgl/src/widgets/lv_arc.c (limited to 'lib/lvgl/src/widgets/lv_arc.c') diff --git a/lib/lvgl b/lib/lvgl deleted file mode 160000 index 0732400e..00000000 --- a/lib/lvgl +++ /dev/null @@ -1 +0,0 @@ -Subproject commit 0732400e7b564dd0e7dc4a924619d8e19c5b23a0 diff --git a/lib/lvgl/src/widgets/lv_arc.c b/lib/lvgl/src/widgets/lv_arc.c new file mode 100644 index 00000000..6cab5f33 --- /dev/null +++ b/lib/lvgl/src/widgets/lv_arc.c @@ -0,0 +1,844 @@ +/** + * @file lv_arc.c + * + */ + +/********************* + * INCLUDES + *********************/ +#include "lv_arc.h" +#if LV_USE_ARC != 0 + +#include "../core/lv_group.h" +#include "../core/lv_indev.h" +#include "../misc/lv_assert.h" +#include "../misc/lv_math.h" +#include "../draw/lv_draw_arc.h" + +/********************* + * DEFINES + *********************/ +#define MY_CLASS &lv_arc_class + +#define VALUE_UNSET INT16_MIN + +/********************** + * TYPEDEFS + **********************/ + +/********************** + * STATIC PROTOTYPES + **********************/ + +static void lv_arc_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj); +static void lv_arc_draw(lv_event_t * e); +static void lv_arc_event(const lv_obj_class_t * class_p, lv_event_t * e); +static void inv_arc_area(lv_obj_t * arc, uint16_t start_angle, uint16_t end_angle, lv_part_t part); +static void inv_knob_area(lv_obj_t * obj); +static void get_center(const lv_obj_t * obj, lv_point_t * center, lv_coord_t * arc_r); +static lv_coord_t get_angle(const lv_obj_t * obj); +static void get_knob_area(lv_obj_t * arc, const lv_point_t * center, lv_coord_t r, lv_area_t * knob_area); +static void value_update(lv_obj_t * arc); + +/********************** + * STATIC VARIABLES + **********************/ +const lv_obj_class_t lv_arc_class = { + .constructor_cb = lv_arc_constructor, + .event_cb = lv_arc_event, + .instance_size = sizeof(lv_arc_t), + .editable = LV_OBJ_CLASS_EDITABLE_TRUE, + .base_class = &lv_obj_class +}; + +/********************** + * MACROS + **********************/ + +/********************** + * GLOBAL FUNCTIONS + **********************/ + +lv_obj_t * lv_arc_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; +} + +/*====================== + * Add/remove functions + *=====================*/ + +/* + * New object specific "add" or "remove" functions come here + */ + +/*===================== + * Setter functions + *====================*/ + +void lv_arc_set_start_angle(lv_obj_t * obj, uint16_t start) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + lv_arc_t * arc = (lv_arc_t *)obj; + + if(start > 360) start -= 360; + + int16_t old_delta = arc->indic_angle_end - arc->indic_angle_start; + int16_t new_delta = arc->indic_angle_end - start; + + if(old_delta < 0) old_delta = 360 + old_delta; + if(new_delta < 0) new_delta = 360 + new_delta; + + if(LV_ABS(new_delta - old_delta) > 180) lv_obj_invalidate(obj); + else if(new_delta < old_delta) inv_arc_area(obj, arc->indic_angle_start, start, LV_PART_INDICATOR); + else if(old_delta < new_delta) inv_arc_area(obj, start, arc->indic_angle_start, LV_PART_INDICATOR); + + inv_knob_area(obj); + + arc->indic_angle_start = start; + + inv_knob_area(obj); +} + +void lv_arc_set_end_angle(lv_obj_t * obj, uint16_t end) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + lv_arc_t * arc = (lv_arc_t *)obj; + if(end > 360) end -= 360; + + int16_t old_delta = arc->indic_angle_end - arc->indic_angle_start; + int16_t new_delta = end - arc->indic_angle_start; + + if(old_delta < 0) old_delta = 360 + old_delta; + if(new_delta < 0) new_delta = 360 + new_delta; + + if(LV_ABS(new_delta - old_delta) > 180) lv_obj_invalidate(obj); + else if(new_delta < old_delta) inv_arc_area(obj, end, arc->indic_angle_end, LV_PART_INDICATOR); + else if(old_delta < new_delta) inv_arc_area(obj, arc->indic_angle_end, end, LV_PART_INDICATOR); + + inv_knob_area(obj); + + arc->indic_angle_end = end; + + inv_knob_area(obj); +} + +void lv_arc_set_angles(lv_obj_t * obj, uint16_t start, uint16_t end) +{ + lv_arc_set_end_angle(obj, end); + lv_arc_set_start_angle(obj, start); +} + +void lv_arc_set_bg_start_angle(lv_obj_t * obj, uint16_t start) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + lv_arc_t * arc = (lv_arc_t *)obj; + + if(start > 360) start -= 360; + + int16_t old_delta = arc->bg_angle_end - arc->bg_angle_start; + int16_t new_delta = arc->bg_angle_end - start; + + if(old_delta < 0) old_delta = 360 + old_delta; + if(new_delta < 0) new_delta = 360 + new_delta; + + if(LV_ABS(new_delta - old_delta) > 180) lv_obj_invalidate(obj); + else if(new_delta < old_delta) inv_arc_area(obj, arc->bg_angle_start, start, LV_PART_MAIN); + else if(old_delta < new_delta) inv_arc_area(obj, start, arc->bg_angle_start, LV_PART_MAIN); + + arc->bg_angle_start = start; + + value_update(obj); +} + +void lv_arc_set_bg_end_angle(lv_obj_t * obj, uint16_t end) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + lv_arc_t * arc = (lv_arc_t *)obj; + + if(end > 360) end -= 360; + + int16_t old_delta = arc->bg_angle_end - arc->bg_angle_start; + int16_t new_delta = end - arc->bg_angle_start; + + if(old_delta < 0) old_delta = 360 + old_delta; + if(new_delta < 0) new_delta = 360 + new_delta; + + if(LV_ABS(new_delta - old_delta) > 180) lv_obj_invalidate(obj); + else if(new_delta < old_delta) inv_arc_area(obj, end, arc->bg_angle_end, LV_PART_MAIN); + else if(old_delta < new_delta) inv_arc_area(obj, arc->bg_angle_end, end, LV_PART_MAIN); + + arc->bg_angle_end = end; + + value_update(obj); +} + +void lv_arc_set_bg_angles(lv_obj_t * obj, uint16_t start, uint16_t end) +{ + lv_arc_set_bg_end_angle(obj, end); + lv_arc_set_bg_start_angle(obj, start); +} + +void lv_arc_set_rotation(lv_obj_t * obj, uint16_t rotation) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + lv_arc_t * arc = (lv_arc_t *)obj; + + arc->rotation = rotation; + + lv_obj_invalidate(obj); +} + +void lv_arc_set_mode(lv_obj_t * obj, lv_arc_mode_t type) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + lv_arc_t * arc = (lv_arc_t *)obj; + + int16_t val = arc->value; + + arc->type = type; + arc->value = -1; /** Force set_value handling*/ + + int16_t bg_midpoint, bg_end = arc->bg_angle_end; + if(arc->bg_angle_end < arc->bg_angle_start) bg_end = arc->bg_angle_end + 360; + + switch(arc->type) { + case LV_ARC_MODE_SYMMETRICAL: + bg_midpoint = (arc->bg_angle_start + bg_end) / 2; + lv_arc_set_start_angle(obj, bg_midpoint); + lv_arc_set_end_angle(obj, bg_midpoint); + break; + case LV_ARC_MODE_REVERSE: + lv_arc_set_end_angle(obj, arc->bg_angle_end); + break; + default: /** LV_ARC_TYPE_NORMAL*/ + lv_arc_set_start_angle(obj, arc->bg_angle_start); + } + + lv_arc_set_value(obj, val); +} + +void lv_arc_set_value(lv_obj_t * obj, int16_t value) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + lv_arc_t * arc = (lv_arc_t *)obj; + + if(arc->value == value) return; + + int16_t new_value; + new_value = value > arc->max_value ? arc->max_value : value; + new_value = new_value < arc->min_value ? arc->min_value : new_value; + + if(arc->value == new_value) return; + arc->value = new_value; + + value_update(obj); +} + +void lv_arc_set_range(lv_obj_t * obj, int16_t min, int16_t max) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + lv_arc_t * arc = (lv_arc_t *)obj; + + if(arc->min_value == min && arc->max_value == max) return; + + arc->min_value = min; + arc->max_value = max; + + if(arc->value < min) { + arc->value = min; + } + if(arc->value > max) { + arc->value = max; + } + + value_update(obj); /*value has changed relative to the new range*/ +} + +void lv_arc_set_change_rate(lv_obj_t * obj, uint16_t rate) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + lv_arc_t * arc = (lv_arc_t *)obj; + + arc->chg_rate = rate; +} + +/*===================== + * Getter functions + *====================*/ + +uint16_t lv_arc_get_angle_start(lv_obj_t * obj) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + return ((lv_arc_t *) obj)->indic_angle_start; +} + +uint16_t lv_arc_get_angle_end(lv_obj_t * obj) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + return ((lv_arc_t *) obj)->indic_angle_end; +} + +uint16_t lv_arc_get_bg_angle_start(lv_obj_t * obj) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + return ((lv_arc_t *) obj)->bg_angle_start; +} + +uint16_t lv_arc_get_bg_angle_end(lv_obj_t * obj) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + return ((lv_arc_t *) obj)->bg_angle_end; +} + +int16_t lv_arc_get_value(const lv_obj_t * obj) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + return ((lv_arc_t *) obj)->value; +} + +int16_t lv_arc_get_min_value(const lv_obj_t * obj) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + return ((lv_arc_t *) obj)->min_value; +} + +int16_t lv_arc_get_max_value(const lv_obj_t * obj) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + return ((lv_arc_t *) obj)->max_value; +} + +lv_arc_mode_t lv_arc_get_mode(const lv_obj_t * obj) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + return ((lv_arc_t *) obj)->type; +} + +/*===================== + * Other functions + *====================*/ + + +void lv_arc_align_obj_to_angle(const lv_obj_t * obj, lv_obj_t * obj_to_align, lv_coord_t r_offset) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + LV_ASSERT_NULL(obj_to_align); + + lv_obj_update_layout(obj); + + lv_point_t center; + lv_coord_t arc_r; + get_center(obj, ¢er, &arc_r); + lv_coord_t indic_width = lv_obj_get_style_arc_width(obj, LV_PART_INDICATOR); + lv_coord_t indic_width_half = indic_width / 2; + arc_r -= indic_width_half; + arc_r += r_offset; + + uint16_t angle = get_angle(obj); + lv_coord_t knob_x = (arc_r * lv_trigo_sin(angle + 90)) >> LV_TRIGO_SHIFT; + lv_coord_t knob_y = (arc_r * lv_trigo_sin(angle)) >> LV_TRIGO_SHIFT; + lv_obj_align_to(obj_to_align, obj, LV_ALIGN_CENTER, knob_x, knob_y); +} + +void lv_arc_rotate_obj_to_angle(const lv_obj_t * obj, lv_obj_t * obj_to_rotate, lv_coord_t r_offset) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + LV_ASSERT_NULL(obj_to_rotate); + + lv_obj_update_layout(obj); + + lv_point_t center; + lv_coord_t arc_r; + get_center(obj, ¢er, &arc_r); + lv_coord_t indic_width = lv_obj_get_style_arc_width(obj, LV_PART_INDICATOR); + lv_coord_t indic_width_half = indic_width / 2; + arc_r -= indic_width_half; + + arc_r += r_offset; + lv_obj_align_to(obj_to_rotate, obj, LV_ALIGN_CENTER, 0, -arc_r); + + lv_obj_update_layout(obj); + + uint16_t angle = get_angle(obj); + lv_coord_t pivot_x = obj_to_rotate->coords.x1 - center.x; + lv_coord_t pivot_y = obj_to_rotate->coords.y1 - center.y; + lv_obj_set_style_transform_pivot_x(obj_to_rotate, -pivot_x, 0); + lv_obj_set_style_transform_pivot_y(obj_to_rotate, -pivot_y, 0); + lv_obj_set_style_transform_angle(obj_to_rotate, angle * 10 + 900, 0); +} + + +/********************** + * STATIC FUNCTIONS + **********************/ + +static void lv_arc_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj) +{ + LV_UNUSED(class_p); + LV_TRACE_OBJ_CREATE("begin"); + + lv_arc_t * arc = (lv_arc_t *)obj; + + /*Initialize the allocated 'ext'*/ + arc->rotation = 0; + arc->bg_angle_start = 135; + arc->bg_angle_end = 45; + arc->indic_angle_start = 135; + arc->indic_angle_end = 270; + arc->type = LV_ARC_MODE_NORMAL; + arc->value = VALUE_UNSET; + arc->min_close = 1; + arc->min_value = 0; + arc->max_value = 100; + arc->dragging = false; + arc->chg_rate = 720; + arc->last_tick = lv_tick_get(); + arc->last_angle = arc->indic_angle_end; + + lv_obj_add_flag(obj, LV_OBJ_FLAG_CLICKABLE); + lv_obj_clear_flag(obj, LV_OBJ_FLAG_SCROLL_CHAIN | LV_OBJ_FLAG_SCROLLABLE); + lv_obj_set_ext_click_area(obj, LV_DPI_DEF / 10); + + + LV_TRACE_OBJ_CREATE("finished"); +} + +static void lv_arc_event(const lv_obj_class_t * class_p, lv_event_t * e) +{ + LV_UNUSED(class_p); + + lv_res_t res; + + /*Call the ancestor's event handler*/ + res = lv_obj_event_base(MY_CLASS, e); + if(res != LV_RES_OK) return; + + lv_event_code_t code = lv_event_get_code(e); + lv_obj_t * obj = lv_event_get_target(e); + lv_arc_t * arc = (lv_arc_t *)lv_event_get_target(e); + if(code == LV_EVENT_PRESSING) { + lv_indev_t * indev = lv_indev_get_act(); + if(indev == NULL) return; + + /*Handle only pointers here*/ + lv_indev_type_t indev_type = lv_indev_get_type(indev); + if(indev_type != LV_INDEV_TYPE_POINTER) return; + + lv_point_t p; + lv_indev_get_point(indev, &p); + + /*Make point relative to the arc's center*/ + lv_point_t center; + lv_coord_t r; + get_center(obj, ¢er, &r); + + p.x -= center.x; + p.y -= center.y; + + /*Enter dragging mode if pressed out of the knob*/ + if(arc->dragging == false) { + lv_coord_t indic_width = lv_obj_get_style_arc_width(obj, LV_PART_INDICATOR); + r -= indic_width; + /*Add some more sensitive area if there is no advanced git testing. + * (Advanced hit testing is more precise)*/ + if(lv_obj_has_flag(obj, LV_OBJ_FLAG_ADV_HITTEST)) { + r -= indic_width; + + } + else { + r -= LV_MAX(r / 4, indic_width); + } + if(r < 1) r = 1; + + if(p.x * p.x + p.y * p.y > r * r) { + arc->dragging = true; + arc->last_tick = lv_tick_get(); /*Capture timestamp at dragging start*/ + } + } + + /*It must be in "dragging" mode to turn the arc*/ + if(arc->dragging == false) return; + + /*No angle can be determined if exactly the middle of the arc is being pressed*/ + if(p.x == 0 && p.y == 0) return; + + /*Calculate the angle of the pressed point*/ + int16_t angle; + int16_t bg_end = arc->bg_angle_end; + if(arc->bg_angle_end < arc->bg_angle_start) { + bg_end = arc->bg_angle_end + 360; + } + + angle = lv_atan2(p.y, p.x); + angle -= arc->rotation; + angle -= arc->bg_angle_start; /*Make the angle relative to the start angle*/ + + if(angle < 0) angle += 360; + + int16_t deg_range = bg_end - arc->bg_angle_start; + + int16_t last_angle_rel = arc->last_angle - arc->bg_angle_start; + int16_t delta_angle = angle - last_angle_rel; + + /*Do not allow big jumps. + *It's mainly to avoid jumping to the opposite end if the "dead" range between min. and max. is crossed. + *Check which end was closer on the last valid press (arc->min_close) and prefer that end*/ + if(LV_ABS(delta_angle) > 280) { + if(arc->min_close) angle = 0; + else angle = deg_range; + } + else { + if(angle < deg_range / 2)arc->min_close = 1; + else arc->min_close = 0; + } + + /*Calculate the slew rate limited angle based on change rate (degrees/sec)*/ + delta_angle = angle - last_angle_rel; + uint32_t delta_tick = lv_tick_elaps(arc->last_tick); + int16_t delta_angle_max = (arc->chg_rate * delta_tick) / 1000; + + if(delta_angle > delta_angle_max) { + delta_angle = delta_angle_max; + } + else if(delta_angle < -delta_angle_max) { + delta_angle = -delta_angle_max; + } + + angle = last_angle_rel + delta_angle; /*Apply the limited angle change*/ + + /*Rounding for symmetry*/ + int32_t round = ((bg_end - arc->bg_angle_start) * 8) / (arc->max_value - arc->min_value); + round = (round + 4) >> 4; + angle += round; + + angle += arc->bg_angle_start; /*Make the angle absolute again*/ + + /*Set the new value*/ + int16_t old_value = arc->value; + int16_t new_value = lv_map(angle, arc->bg_angle_start, bg_end, arc->min_value, arc->max_value); + if(new_value != lv_arc_get_value(obj)) { + arc->last_tick = lv_tick_get(); /*Cache timestamp for the next iteration*/ + lv_arc_set_value(obj, new_value); /*set_value caches the last_angle for the next iteration*/ + if(new_value != old_value) { + res = lv_event_send(obj, LV_EVENT_VALUE_CHANGED, NULL); + if(res != LV_RES_OK) return; + } + } + + /*Don't let the elapsed time become too big while sitting on an end point*/ + if(new_value == arc->min_value || new_value == arc->max_value) { + arc->last_tick = lv_tick_get(); /*Cache timestamp for the next iteration*/ + } + } + else if(code == LV_EVENT_RELEASED || code == LV_EVENT_PRESS_LOST) { + arc->dragging = false; + + /*Leave edit mode if released. (No need to wait for LONG_PRESS)*/ + lv_group_t * g = lv_obj_get_group(obj); + bool editing = lv_group_get_editing(g); + lv_indev_type_t indev_type = lv_indev_get_type(lv_indev_get_act()); + if(indev_type == LV_INDEV_TYPE_ENCODER) { + if(editing) lv_group_set_editing(g, false); + } + + } + else if(code == LV_EVENT_KEY) { + char c = *((char *)lv_event_get_param(e)); + + int16_t old_value = arc->value; + if(c == LV_KEY_RIGHT || c == LV_KEY_UP) { + lv_arc_set_value(obj, lv_arc_get_value(obj) + 1); + } + else if(c == LV_KEY_LEFT || c == LV_KEY_DOWN) { + lv_arc_set_value(obj, lv_arc_get_value(obj) - 1); + } + + if(old_value != arc->value) { + res = lv_event_send(obj, LV_EVENT_VALUE_CHANGED, NULL); + if(res != LV_RES_OK) return; + } + } + else if(code == LV_EVENT_HIT_TEST) { + lv_hit_test_info_t * info = lv_event_get_param(e);; + + lv_point_t p; + lv_coord_t r; + get_center(obj, &p, &r); + + lv_coord_t ext_click_area = 0; + if(obj->spec_attr) ext_click_area = obj->spec_attr->ext_click_pad; + + lv_coord_t w = lv_obj_get_style_arc_width(obj, LV_PART_MAIN); + r -= w + ext_click_area; + + lv_area_t a; + /*Invalid if clicked inside*/ + lv_area_set(&a, p.x - r, p.y - r, p.x + r, p.y + r); + if(_lv_area_is_point_on(&a, info->point, LV_RADIUS_CIRCLE)) { + info->res = false; + return; + } + + /*Valid if no clicked outside*/ + lv_area_increase(&a, w + ext_click_area * 2, w + ext_click_area * 2); + info->res = _lv_area_is_point_on(&a, info->point, LV_RADIUS_CIRCLE); + } + else if(code == LV_EVENT_REFR_EXT_DRAW_SIZE) { + lv_coord_t bg_left = lv_obj_get_style_pad_left(obj, LV_PART_MAIN); + lv_coord_t bg_right = lv_obj_get_style_pad_right(obj, LV_PART_MAIN); + lv_coord_t bg_top = lv_obj_get_style_pad_top(obj, LV_PART_MAIN); + lv_coord_t bg_bottom = lv_obj_get_style_pad_bottom(obj, LV_PART_MAIN); + lv_coord_t bg_pad = LV_MAX4(bg_left, bg_right, bg_top, bg_bottom); + + lv_coord_t knob_left = lv_obj_get_style_pad_left(obj, LV_PART_KNOB); + lv_coord_t knob_right = lv_obj_get_style_pad_right(obj, LV_PART_KNOB); + lv_coord_t knob_top = lv_obj_get_style_pad_top(obj, LV_PART_KNOB); + lv_coord_t knob_bottom = lv_obj_get_style_pad_bottom(obj, LV_PART_KNOB); + lv_coord_t knob_pad = LV_MAX4(knob_left, knob_right, knob_top, knob_bottom) + 2; + + lv_coord_t * s = lv_event_get_param(e); + *s = LV_MAX(*s, knob_pad - bg_pad); + } + else if(code == LV_EVENT_DRAW_MAIN) { + lv_arc_draw(e); + } +} + +static void lv_arc_draw(lv_event_t * e) +{ + lv_obj_t * obj = lv_event_get_target(e); + lv_arc_t * arc = (lv_arc_t *)obj; + + lv_draw_ctx_t * draw_ctx = lv_event_get_draw_ctx(e); + + lv_point_t center; + lv_coord_t arc_r; + get_center(obj, ¢er, &arc_r); + + lv_obj_draw_part_dsc_t part_draw_dsc; + lv_obj_draw_dsc_init(&part_draw_dsc, draw_ctx); + + /*Draw the background arc*/ + lv_draw_arc_dsc_t arc_dsc; + if(arc_r > 0) { + lv_draw_arc_dsc_init(&arc_dsc); + lv_obj_init_draw_arc_dsc(obj, LV_PART_MAIN, &arc_dsc); + + part_draw_dsc.part = LV_PART_MAIN; + part_draw_dsc.class_p = MY_CLASS; + part_draw_dsc.type = LV_ARC_DRAW_PART_BACKGROUND; + part_draw_dsc.p1 = ¢er; + part_draw_dsc.radius = arc_r; + part_draw_dsc.arc_dsc = &arc_dsc; + lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc); + + lv_draw_arc(draw_ctx, &arc_dsc, ¢er, part_draw_dsc.radius, arc->bg_angle_start + arc->rotation, + arc->bg_angle_end + arc->rotation); + + lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc); + } + + /*Make the indicator arc smaller or larger according to its greatest padding value*/ + lv_coord_t left_indic = lv_obj_get_style_pad_left(obj, LV_PART_INDICATOR); + lv_coord_t right_indic = lv_obj_get_style_pad_right(obj, LV_PART_INDICATOR); + lv_coord_t top_indic = lv_obj_get_style_pad_top(obj, LV_PART_INDICATOR); + lv_coord_t bottom_indic = lv_obj_get_style_pad_bottom(obj, LV_PART_INDICATOR); + lv_coord_t indic_r = arc_r - LV_MAX4(left_indic, right_indic, top_indic, bottom_indic); + + if(indic_r > 0) { + lv_draw_arc_dsc_init(&arc_dsc); + lv_obj_init_draw_arc_dsc(obj, LV_PART_INDICATOR, &arc_dsc); + + part_draw_dsc.part = LV_PART_INDICATOR; + part_draw_dsc.class_p = MY_CLASS; + part_draw_dsc.type = LV_ARC_DRAW_PART_FOREGROUND; + part_draw_dsc.p1 = ¢er; + part_draw_dsc.radius = indic_r; + part_draw_dsc.arc_dsc = &arc_dsc; + lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc); + + if(arc_dsc.width > part_draw_dsc.radius) arc_dsc.width = part_draw_dsc.radius; + lv_draw_arc(draw_ctx, &arc_dsc, ¢er, part_draw_dsc.radius, arc->indic_angle_start + arc->rotation, + arc->indic_angle_end + arc->rotation); + + lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc); + } + + lv_area_t knob_area; + get_knob_area(obj, ¢er, arc_r, &knob_area); + + 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); + + part_draw_dsc.part = LV_PART_KNOB; + part_draw_dsc.class_p = MY_CLASS; + part_draw_dsc.type = LV_ARC_DRAW_PART_KNOB; + part_draw_dsc.draw_area = &knob_area; + part_draw_dsc.rect_dsc = &knob_rect_dsc; + lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc); + + lv_draw_rect(draw_ctx, &knob_rect_dsc, &knob_area); + + lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc); +} + +static void inv_arc_area(lv_obj_t * obj, uint16_t start_angle, uint16_t end_angle, lv_part_t part) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + + /*Skip this complicated invalidation if the arc is not visible*/ + if(lv_obj_is_visible(obj) == false) return; + + lv_arc_t * arc = (lv_arc_t *)obj; + + if(start_angle == end_angle) return; + + if(start_angle > 360) start_angle -= 360; + if(end_angle > 360) end_angle -= 360; + + start_angle += arc->rotation; + end_angle += arc->rotation; + + if(start_angle > 360) start_angle -= 360; + if(end_angle > 360) end_angle -= 360; + + lv_coord_t r; + lv_point_t c; + get_center(obj, &c, &r); + + lv_coord_t w = lv_obj_get_style_arc_width(obj, part); + lv_coord_t rounded = lv_obj_get_style_arc_rounded(obj, part); + + lv_area_t inv_area; + lv_draw_arc_get_area(c.x, c.y, r, start_angle, end_angle, w, rounded, &inv_area); + lv_obj_invalidate_area(obj, &inv_area); +} + +static void inv_knob_area(lv_obj_t * obj) +{ + lv_point_t c; + lv_coord_t r; + get_center(obj, &c, &r); + + lv_area_t a; + get_knob_area(obj, &c, r, &a); + lv_obj_invalidate_area(obj, &a); +} + +static void get_center(const lv_obj_t * obj, lv_point_t * center, lv_coord_t * arc_r) +{ + lv_coord_t left_bg = lv_obj_get_style_pad_left(obj, LV_PART_MAIN); + lv_coord_t right_bg = lv_obj_get_style_pad_right(obj, LV_PART_MAIN); + lv_coord_t top_bg = lv_obj_get_style_pad_top(obj, LV_PART_MAIN); + lv_coord_t bottom_bg = lv_obj_get_style_pad_bottom(obj, LV_PART_MAIN); + + lv_coord_t r = (LV_MIN(lv_obj_get_width(obj) - left_bg - right_bg, + lv_obj_get_height(obj) - top_bg - bottom_bg)) / 2; + + center->x = obj->coords.x1 + r + left_bg; + center->y = obj->coords.y1 + r + top_bg; + + if(arc_r) *arc_r = r; +} + +static lv_coord_t get_angle(const lv_obj_t * obj) +{ + lv_arc_t * arc = (lv_arc_t *)obj; + uint16_t angle = arc->rotation; + if(arc->type == LV_ARC_MODE_NORMAL) { + angle += arc->indic_angle_end; + } + else if(arc->type == LV_ARC_MODE_REVERSE) { + angle += arc->indic_angle_start; + } + else if(arc->type == LV_ARC_MODE_SYMMETRICAL) { + int16_t bg_end = arc->bg_angle_end; + if(arc->bg_angle_end < arc->bg_angle_start) bg_end = arc->bg_angle_end + 360; + int16_t indic_end = arc->indic_angle_end; + if(arc->indic_angle_end < arc->indic_angle_start) indic_end = arc->indic_angle_end + 360; + + int32_t angle_midpoint = (int32_t)(arc->bg_angle_start + bg_end) / 2; + if(arc->indic_angle_start < angle_midpoint) angle += arc->indic_angle_start; + else if(indic_end > angle_midpoint) angle += arc->indic_angle_end; + else angle += angle_midpoint; + } + + return angle; +} + + +static void get_knob_area(lv_obj_t * obj, const lv_point_t * center, lv_coord_t r, lv_area_t * knob_area) +{ + lv_coord_t indic_width = lv_obj_get_style_arc_width(obj, LV_PART_INDICATOR); + lv_coord_t indic_width_half = indic_width / 2; + r -= indic_width_half; + + lv_coord_t angle = get_angle(obj); + lv_coord_t knob_x = (r * lv_trigo_sin(angle + 90)) >> LV_TRIGO_SHIFT; + lv_coord_t knob_y = (r * lv_trigo_sin(angle)) >> LV_TRIGO_SHIFT; + + lv_coord_t left_knob = lv_obj_get_style_pad_left(obj, LV_PART_KNOB); + lv_coord_t right_knob = lv_obj_get_style_pad_right(obj, LV_PART_KNOB); + lv_coord_t top_knob = lv_obj_get_style_pad_top(obj, LV_PART_KNOB); + lv_coord_t bottom_knob = lv_obj_get_style_pad_bottom(obj, LV_PART_KNOB); + + knob_area->x1 = center->x + knob_x - left_knob - indic_width_half; + knob_area->x2 = center->x + knob_x + right_knob + indic_width_half; + knob_area->y1 = center->y + knob_y - top_knob - indic_width_half; + knob_area->y2 = center->y + knob_y + bottom_knob + indic_width_half; +} + +/** + * Used internally to update arc angles after a value change + * @param arc pointer to an arc object + */ +static void value_update(lv_obj_t * obj) +{ + LV_ASSERT_OBJ(obj, MY_CLASS); + lv_arc_t * arc = (lv_arc_t *)obj; + + /*If the value is still not set to any value do not update*/ + if(arc->value == VALUE_UNSET) return; + + int16_t bg_midpoint, range_midpoint, bg_end = arc->bg_angle_end; + if(arc->bg_angle_end < arc->bg_angle_start) bg_end = arc->bg_angle_end + 360; + + int16_t angle; + switch(arc->type) { + case LV_ARC_MODE_SYMMETRICAL: + bg_midpoint = (arc->bg_angle_start + bg_end) / 2; + range_midpoint = (int32_t)(arc->min_value + arc->max_value) / 2; + + if(arc->value < range_midpoint) { + angle = lv_map(arc->value, arc->min_value, range_midpoint, arc->bg_angle_start, bg_midpoint); + lv_arc_set_start_angle(obj, angle); + lv_arc_set_end_angle(obj, bg_midpoint); + } + else { + angle = lv_map(arc->value, range_midpoint, arc->max_value, bg_midpoint, bg_end); + lv_arc_set_start_angle(obj, bg_midpoint); + lv_arc_set_end_angle(obj, angle); + } + break; + case LV_ARC_MODE_REVERSE: + angle = lv_map(arc->value, arc->min_value, arc->max_value, bg_end, arc->bg_angle_start); + lv_arc_set_angles(obj, angle, arc->bg_angle_end); + break; + case LV_ARC_MODE_NORMAL: + angle = lv_map(arc->value, arc->min_value, arc->max_value, arc->bg_angle_start, bg_end); + lv_arc_set_angles(obj, arc->bg_angle_start, angle); + + break; + default: + LV_LOG_WARN("Invalid mode: %d", arc->type); + return; + } + arc->last_angle = angle; /*Cache angle for slew rate limiting*/ +} + +#endif -- cgit v1.2.3