1 /**
2 * @file lv_meter.c
3 *
4 */
5
6 /*********************
7 * INCLUDES
8 *********************/
9 #include "lv_meter.h"
10 #if LV_USE_METER != 0
11
12 #include "../../../misc/lv_assert.h"
13
14 /*********************
15 * DEFINES
16 *********************/
17 #define MY_CLASS &lv_meter_class
18
19 /**********************
20 * TYPEDEFS
21 **********************/
22
23 /**********************
24 * STATIC PROTOTYPES
25 **********************/
26 static void lv_meter_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
27 static void lv_meter_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj);
28 static void lv_meter_event(const lv_obj_class_t * class_p, lv_event_t * e);
29 static void draw_arcs(lv_obj_t * obj, lv_draw_ctx_t * draw_ctx, const lv_area_t * scale_area);
30 static void draw_ticks_and_labels(lv_obj_t * obj, lv_draw_ctx_t * draw_ctx, const lv_area_t * scale_area);
31 static void draw_needles(lv_obj_t * obj, lv_draw_ctx_t * draw_ctx, const lv_area_t * scale_area);
32 static void inv_arc(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t old_value, int32_t new_value);
33 static void inv_line(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t value);
34
35 /**********************
36 * STATIC VARIABLES
37 **********************/
38 const lv_obj_class_t lv_meter_class = {
39 .constructor_cb = lv_meter_constructor,
40 .destructor_cb = lv_meter_destructor,
41 .event_cb = lv_meter_event,
42 .instance_size = sizeof(lv_meter_t),
43 .base_class = &lv_obj_class
44 };
45
46 /**********************
47 * MACROS
48 **********************/
49
50 /**********************
51 * GLOBAL FUNCTIONS
52 **********************/
53
lv_meter_create(lv_obj_t * parent)54 lv_obj_t * lv_meter_create(lv_obj_t * parent)
55 {
56 LV_LOG_INFO("begin");
57 lv_obj_t * obj = lv_obj_class_create_obj(MY_CLASS, parent);
58 lv_obj_class_init_obj(obj);
59 return obj;
60 }
61
62 /*=====================
63 * Add scale
64 *====================*/
65
lv_meter_add_scale(lv_obj_t * obj)66 lv_meter_scale_t * lv_meter_add_scale(lv_obj_t * obj)
67 {
68 LV_ASSERT_OBJ(obj, MY_CLASS);
69 lv_meter_t * meter = (lv_meter_t *)obj;
70
71 lv_meter_scale_t * scale = _lv_ll_ins_head(&meter->scale_ll);
72 LV_ASSERT_MALLOC(scale);
73 lv_memset_00(scale, sizeof(lv_meter_scale_t));
74
75 scale->angle_range = 270;
76 scale->rotation = 90 + (360 - scale->angle_range) / 2;
77 scale->min = 0;
78 scale->max = 100;
79 scale->tick_cnt = 6;
80 scale->tick_length = 8;
81 scale->tick_width = 2;
82 scale->label_gap = 2;
83
84 return scale;
85 }
86
lv_meter_set_scale_ticks(lv_obj_t * obj,lv_meter_scale_t * scale,uint16_t cnt,uint16_t width,uint16_t len,lv_color_t color)87 void lv_meter_set_scale_ticks(lv_obj_t * obj, lv_meter_scale_t * scale, uint16_t cnt, uint16_t width, uint16_t len,
88 lv_color_t color)
89 {
90 scale->tick_cnt = cnt;
91 scale->tick_width = width;
92 scale->tick_length = len;
93 scale->tick_color = color;
94 lv_obj_invalidate(obj);
95 }
96
lv_meter_set_scale_major_ticks(lv_obj_t * obj,lv_meter_scale_t * scale,uint16_t nth,uint16_t width,uint16_t len,lv_color_t color,int16_t label_gap)97 void lv_meter_set_scale_major_ticks(lv_obj_t * obj, lv_meter_scale_t * scale, uint16_t nth, uint16_t width,
98 uint16_t len, lv_color_t color, int16_t label_gap)
99 {
100 scale->tick_major_nth = nth;
101 scale->tick_major_width = width;
102 scale->tick_major_length = len;
103 scale->tick_major_color = color;
104 scale->label_gap = label_gap;
105 lv_obj_invalidate(obj);
106 }
107
lv_meter_set_scale_range(lv_obj_t * obj,lv_meter_scale_t * scale,int32_t min,int32_t max,uint32_t angle_range,uint32_t rotation)108 void lv_meter_set_scale_range(lv_obj_t * obj, lv_meter_scale_t * scale, int32_t min, int32_t max, uint32_t angle_range,
109 uint32_t rotation)
110 {
111 scale->min = min;
112 scale->max = max;
113 scale->angle_range = angle_range;
114 scale->rotation = rotation;
115 lv_obj_invalidate(obj);
116 }
117
118 /*=====================
119 * Add indicator
120 *====================*/
121
lv_meter_add_needle_line(lv_obj_t * obj,lv_meter_scale_t * scale,uint16_t width,lv_color_t color,int16_t r_mod)122 lv_meter_indicator_t * lv_meter_add_needle_line(lv_obj_t * obj, lv_meter_scale_t * scale, uint16_t width,
123 lv_color_t color, int16_t r_mod)
124 {
125 LV_ASSERT_OBJ(obj, MY_CLASS);
126 lv_meter_t * meter = (lv_meter_t *)obj;
127 lv_meter_indicator_t * indic = _lv_ll_ins_head(&meter->indicator_ll);
128 LV_ASSERT_MALLOC(indic);
129 lv_memset_00(indic, sizeof(lv_meter_indicator_t));
130 indic->scale = scale;
131 indic->opa = LV_OPA_COVER;
132
133 indic->type = LV_METER_INDICATOR_TYPE_NEEDLE_LINE;
134 indic->type_data.needle_line.width = width;
135 indic->type_data.needle_line.color = color;
136 indic->type_data.needle_line.r_mod = r_mod;
137 lv_obj_invalidate(obj);
138
139 return indic;
140 }
141
lv_meter_add_needle_img(lv_obj_t * obj,lv_meter_scale_t * scale,const void * src,lv_coord_t pivot_x,lv_coord_t pivot_y)142 lv_meter_indicator_t * lv_meter_add_needle_img(lv_obj_t * obj, lv_meter_scale_t * scale, const void * src,
143 lv_coord_t pivot_x, lv_coord_t pivot_y)
144 {
145 LV_ASSERT_OBJ(obj, MY_CLASS);
146 lv_meter_t * meter = (lv_meter_t *)obj;
147 lv_meter_indicator_t * indic = _lv_ll_ins_head(&meter->indicator_ll);
148 LV_ASSERT_MALLOC(indic);
149 lv_memset_00(indic, sizeof(lv_meter_indicator_t));
150 indic->scale = scale;
151 indic->opa = LV_OPA_COVER;
152
153 indic->type = LV_METER_INDICATOR_TYPE_NEEDLE_IMG;
154 indic->type_data.needle_img.src = src;
155 indic->type_data.needle_img.pivot.x = pivot_x;
156 indic->type_data.needle_img.pivot.y = pivot_y;
157 lv_obj_invalidate(obj);
158
159 return indic;
160 }
161
lv_meter_add_arc(lv_obj_t * obj,lv_meter_scale_t * scale,uint16_t width,lv_color_t color,int16_t r_mod)162 lv_meter_indicator_t * lv_meter_add_arc(lv_obj_t * obj, lv_meter_scale_t * scale, uint16_t width, lv_color_t color,
163 int16_t r_mod)
164 {
165 LV_ASSERT_OBJ(obj, MY_CLASS);
166 lv_meter_t * meter = (lv_meter_t *)obj;
167 lv_meter_indicator_t * indic = _lv_ll_ins_head(&meter->indicator_ll);
168 LV_ASSERT_MALLOC(indic);
169 lv_memset_00(indic, sizeof(lv_meter_indicator_t));
170 indic->scale = scale;
171 indic->opa = LV_OPA_COVER;
172
173 indic->type = LV_METER_INDICATOR_TYPE_ARC;
174 indic->type_data.arc.width = width;
175 indic->type_data.arc.color = color;
176 indic->type_data.arc.r_mod = r_mod;
177
178 lv_obj_invalidate(obj);
179 return indic;
180 }
181
lv_meter_add_scale_lines(lv_obj_t * obj,lv_meter_scale_t * scale,lv_color_t color_start,lv_color_t color_end,bool local,int16_t width_mod)182 lv_meter_indicator_t * lv_meter_add_scale_lines(lv_obj_t * obj, lv_meter_scale_t * scale, lv_color_t color_start,
183 lv_color_t color_end, bool local, int16_t width_mod)
184 {
185 LV_ASSERT_OBJ(obj, MY_CLASS);
186 lv_meter_t * meter = (lv_meter_t *)obj;
187 lv_meter_indicator_t * indic = _lv_ll_ins_head(&meter->indicator_ll);
188 LV_ASSERT_MALLOC(indic);
189 lv_memset_00(indic, sizeof(lv_meter_indicator_t));
190 indic->scale = scale;
191 indic->opa = LV_OPA_COVER;
192
193 indic->type = LV_METER_INDICATOR_TYPE_SCALE_LINES;
194 indic->type_data.scale_lines.color_start = color_start;
195 indic->type_data.scale_lines.color_end = color_end;
196 indic->type_data.scale_lines.local_grad = local;
197 indic->type_data.scale_lines.width_mod = width_mod;
198
199 lv_obj_invalidate(obj);
200 return indic;
201 }
202
203 /*=====================
204 * Set indicator value
205 *====================*/
206
lv_meter_set_indicator_value(lv_obj_t * obj,lv_meter_indicator_t * indic,int32_t value)207 void lv_meter_set_indicator_value(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t value)
208 {
209 int32_t old_start = indic->start_value;
210 int32_t old_end = indic->end_value;
211 indic->start_value = value;
212 indic->end_value = value;
213
214 if(indic->type == LV_METER_INDICATOR_TYPE_ARC) {
215 inv_arc(obj, indic, old_start, value);
216 inv_arc(obj, indic, old_end, value);
217 }
218 else if(indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_IMG || indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_LINE) {
219 inv_line(obj, indic, old_start);
220 inv_line(obj, indic, old_end);
221 inv_line(obj, indic, value);
222 }
223 else {
224 lv_obj_invalidate(obj);
225 }
226 }
227
lv_meter_set_indicator_start_value(lv_obj_t * obj,lv_meter_indicator_t * indic,int32_t value)228 void lv_meter_set_indicator_start_value(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t value)
229 {
230 int32_t old_value = indic->start_value;
231 indic->start_value = value;
232
233 if(indic->type == LV_METER_INDICATOR_TYPE_ARC) {
234 inv_arc(obj, indic, old_value, value);
235 }
236 else if(indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_IMG || indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_LINE) {
237 inv_line(obj, indic, old_value);
238 inv_line(obj, indic, value);
239 }
240 else {
241 lv_obj_invalidate(obj);
242 }
243 }
244
lv_meter_set_indicator_end_value(lv_obj_t * obj,lv_meter_indicator_t * indic,int32_t value)245 void lv_meter_set_indicator_end_value(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t value)
246 {
247 int32_t old_value = indic->end_value;
248 indic->end_value = value;
249
250 if(indic->type == LV_METER_INDICATOR_TYPE_ARC) {
251 inv_arc(obj, indic, old_value, value);
252 }
253 else if(indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_IMG || indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_LINE) {
254 inv_line(obj, indic, old_value);
255 inv_line(obj, indic, value);
256 }
257 else {
258 lv_obj_invalidate(obj);
259 }
260 }
261
262 /**********************
263 * STATIC FUNCTIONS
264 **********************/
265
lv_meter_constructor(const lv_obj_class_t * class_p,lv_obj_t * obj)266 static void lv_meter_constructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
267 {
268 LV_UNUSED(class_p);
269 LV_TRACE_OBJ_CREATE("begin");
270
271 lv_meter_t * meter = (lv_meter_t *)obj;
272
273 _lv_ll_init(&meter->scale_ll, sizeof(lv_meter_scale_t));
274 _lv_ll_init(&meter->indicator_ll, sizeof(lv_meter_indicator_t));
275
276 LV_TRACE_OBJ_CREATE("finished");
277 }
278
lv_meter_destructor(const lv_obj_class_t * class_p,lv_obj_t * obj)279 static void lv_meter_destructor(const lv_obj_class_t * class_p, lv_obj_t * obj)
280 {
281 LV_UNUSED(class_p);
282 LV_ASSERT_OBJ(obj, MY_CLASS);
283 lv_meter_t * meter = (lv_meter_t *)obj;
284 _lv_ll_clear(&meter->indicator_ll);
285 _lv_ll_clear(&meter->scale_ll);
286
287 }
288
lv_meter_event(const lv_obj_class_t * class_p,lv_event_t * e)289 static void lv_meter_event(const lv_obj_class_t * class_p, lv_event_t * e)
290 {
291 LV_UNUSED(class_p);
292
293 lv_res_t res = lv_obj_event_base(MY_CLASS, e);
294 if(res != LV_RES_OK) return;
295
296 lv_event_code_t code = lv_event_get_code(e);
297 lv_obj_t * obj = lv_event_get_target(e);
298 if(code == LV_EVENT_DRAW_MAIN) {
299 lv_draw_ctx_t * draw_ctx = lv_event_get_draw_ctx(e);
300 lv_area_t scale_area;
301 lv_obj_get_content_coords(obj, &scale_area);
302
303 draw_arcs(obj, draw_ctx, &scale_area);
304 draw_ticks_and_labels(obj, draw_ctx, &scale_area);
305 draw_needles(obj, draw_ctx, &scale_area);
306
307 lv_coord_t r_edge = lv_area_get_width(&scale_area) / 2;
308 lv_point_t scale_center;
309 scale_center.x = scale_area.x1 + r_edge;
310 scale_center.y = scale_area.y1 + r_edge;
311
312 lv_draw_rect_dsc_t mid_dsc;
313 lv_draw_rect_dsc_init(&mid_dsc);
314 lv_obj_init_draw_rect_dsc(obj, LV_PART_INDICATOR, &mid_dsc);
315 lv_coord_t w = lv_obj_get_style_width(obj, LV_PART_INDICATOR) / 2;
316 lv_coord_t h = lv_obj_get_style_height(obj, LV_PART_INDICATOR) / 2;
317 lv_area_t nm_cord;
318 nm_cord.x1 = scale_center.x - w;
319 nm_cord.y1 = scale_center.y - h;
320 nm_cord.x2 = scale_center.x + w;
321 nm_cord.y2 = scale_center.y + h;
322 lv_draw_rect(draw_ctx, &mid_dsc, &nm_cord);
323 }
324 }
325
draw_arcs(lv_obj_t * obj,lv_draw_ctx_t * draw_ctx,const lv_area_t * scale_area)326 static void draw_arcs(lv_obj_t * obj, lv_draw_ctx_t * draw_ctx, const lv_area_t * scale_area)
327 {
328 lv_meter_t * meter = (lv_meter_t *)obj;
329
330 lv_draw_arc_dsc_t arc_dsc;
331 lv_draw_arc_dsc_init(&arc_dsc);
332 arc_dsc.rounded = lv_obj_get_style_arc_rounded(obj, LV_PART_ITEMS);
333
334 lv_coord_t r_out = lv_area_get_width(scale_area) / 2 ;
335 lv_point_t scale_center;
336 scale_center.x = scale_area->x1 + r_out;
337 scale_center.y = scale_area->y1 + r_out;
338
339 lv_opa_t opa_main = lv_obj_get_style_opa(obj, LV_PART_MAIN);
340 lv_meter_indicator_t * indic;
341
342 lv_obj_draw_part_dsc_t part_draw_dsc;
343 lv_obj_draw_dsc_init(&part_draw_dsc, draw_ctx);
344 part_draw_dsc.arc_dsc = &arc_dsc;
345 part_draw_dsc.part = LV_PART_INDICATOR;
346 part_draw_dsc.class_p = MY_CLASS;
347 part_draw_dsc.type = LV_METER_DRAW_PART_ARC;
348
349 _LV_LL_READ_BACK(&meter->indicator_ll, indic) {
350 if(indic->type != LV_METER_INDICATOR_TYPE_ARC) continue;
351
352 arc_dsc.color = indic->type_data.arc.color;
353 arc_dsc.width = indic->type_data.arc.width;
354 arc_dsc.opa = indic->opa > LV_OPA_MAX ? opa_main : (opa_main * indic->opa) >> 8;
355
356 lv_meter_scale_t * scale = indic->scale;
357
358 int32_t start_angle = lv_map(indic->start_value, scale->min, scale->max, scale->rotation,
359 scale->rotation + scale->angle_range);
360 int32_t end_angle = lv_map(indic->end_value, scale->min, scale->max, scale->rotation,
361 scale->rotation + scale->angle_range);
362
363 part_draw_dsc.radius = r_out + indic->type_data.arc.r_mod;
364 part_draw_dsc.sub_part_ptr = indic;
365 part_draw_dsc.p1 = &scale_center;
366
367 lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
368 lv_draw_arc(draw_ctx, &arc_dsc, &scale_center, part_draw_dsc.radius, start_angle, end_angle);
369 lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc);
370 }
371 }
372
draw_ticks_and_labels(lv_obj_t * obj,lv_draw_ctx_t * draw_ctx,const lv_area_t * scale_area)373 static void draw_ticks_and_labels(lv_obj_t * obj, lv_draw_ctx_t * draw_ctx, const lv_area_t * scale_area)
374 {
375 lv_meter_t * meter = (lv_meter_t *)obj;
376
377 lv_point_t p_center;
378 lv_coord_t r_edge = LV_MIN(lv_area_get_width(scale_area) / 2, lv_area_get_height(scale_area) / 2);
379 p_center.x = scale_area->x1 + r_edge;
380 p_center.y = scale_area->y1 + r_edge;
381
382 lv_draw_line_dsc_t line_dsc;
383 lv_draw_line_dsc_init(&line_dsc);
384 lv_obj_init_draw_line_dsc(obj, LV_PART_TICKS, &line_dsc);
385 line_dsc.raw_end = 1;
386
387 lv_draw_label_dsc_t label_dsc;
388 lv_draw_label_dsc_init(&label_dsc);
389 lv_obj_init_draw_label_dsc(obj, LV_PART_TICKS, &label_dsc);
390
391 lv_meter_scale_t * scale;
392
393 lv_draw_mask_radius_param_t inner_minor_mask;
394 lv_draw_mask_radius_param_t inner_major_mask;
395 lv_draw_mask_radius_param_t outer_mask;
396
397 lv_obj_draw_part_dsc_t part_draw_dsc;
398 lv_obj_draw_dsc_init(&part_draw_dsc, draw_ctx);
399 part_draw_dsc.class_p = MY_CLASS;
400 part_draw_dsc.part = LV_PART_TICKS;
401 part_draw_dsc.type = LV_METER_DRAW_PART_TICK;
402 part_draw_dsc.line_dsc = &line_dsc;
403
404 _LV_LL_READ_BACK(&meter->scale_ll, scale) {
405 part_draw_dsc.sub_part_ptr = scale;
406
407 lv_coord_t r_out = r_edge;
408 lv_coord_t r_in_minor = r_out - scale->tick_length;
409 lv_coord_t r_in_major = r_out - scale->tick_major_length;
410
411 lv_area_t area_inner_minor;
412 area_inner_minor.x1 = p_center.x - r_in_minor;
413 area_inner_minor.y1 = p_center.y - r_in_minor;
414 area_inner_minor.x2 = p_center.x + r_in_minor;
415 area_inner_minor.y2 = p_center.y + r_in_minor;
416 lv_draw_mask_radius_init(&inner_minor_mask, &area_inner_minor, LV_RADIUS_CIRCLE, true);
417
418 lv_area_t area_inner_major;
419 area_inner_major.x1 = p_center.x - r_in_major;
420 area_inner_major.y1 = p_center.y - r_in_major;
421 area_inner_major.x2 = p_center.x + r_in_major - 1;
422 area_inner_major.y2 = p_center.y + r_in_major - 1;
423 lv_draw_mask_radius_init(&inner_major_mask, &area_inner_major, LV_RADIUS_CIRCLE, true);
424
425 lv_area_t area_outer;
426 area_outer.x1 = p_center.x - r_out;
427 area_outer.y1 = p_center.y - r_out;
428 area_outer.x2 = p_center.x + r_out - 1;
429 area_outer.y2 = p_center.y + r_out - 1;
430 lv_draw_mask_radius_init(&outer_mask, &area_outer, LV_RADIUS_CIRCLE, false);
431 int16_t outer_mask_id = lv_draw_mask_add(&outer_mask, NULL);
432
433 int16_t inner_act_mask_id = LV_MASK_ID_INV; /*Will be added later*/
434
435 uint32_t minor_cnt = scale->tick_major_nth ? scale->tick_major_nth - 1 : 0xFFFF;
436 uint16_t i;
437 for(i = 0; i < scale->tick_cnt; i++) {
438 minor_cnt++;
439 bool major = false;
440 if(minor_cnt == scale->tick_major_nth) {
441 minor_cnt = 0;
442 major = true;
443 }
444
445 int32_t value_of_line = lv_map(i, 0, scale->tick_cnt - 1, scale->min, scale->max);
446 part_draw_dsc.value = value_of_line;
447
448 lv_color_t line_color = major ? scale->tick_major_color : scale->tick_color;
449 lv_color_t line_color_ori = line_color;
450
451 lv_coord_t line_width_ori = major ? scale->tick_major_width : scale->tick_width;
452 lv_coord_t line_width = line_width_ori;
453
454 lv_meter_indicator_t * indic;
455 _LV_LL_READ_BACK(&meter->indicator_ll, indic) {
456 if(indic->type != LV_METER_INDICATOR_TYPE_SCALE_LINES) continue;
457 if(value_of_line >= indic->start_value && value_of_line <= indic->end_value) {
458 line_width += indic->type_data.scale_lines.width_mod;
459
460 if(indic->type_data.scale_lines.color_start.full == indic->type_data.scale_lines.color_end.full) {
461 line_color = indic->type_data.scale_lines.color_start;
462 }
463 else {
464 lv_opa_t ratio;
465 if(indic->type_data.scale_lines.local_grad) {
466 ratio = lv_map(value_of_line, indic->start_value, indic->end_value, LV_OPA_TRANSP, LV_OPA_COVER);
467 }
468 else {
469 ratio = lv_map(value_of_line, scale->min, scale->max, LV_OPA_TRANSP, LV_OPA_COVER);
470 }
471 line_color = lv_color_mix(indic->type_data.scale_lines.color_end, indic->type_data.scale_lines.color_start, ratio);
472 }
473 }
474 }
475
476 int32_t angle_upscale = ((i * scale->angle_range) * 10) / (scale->tick_cnt - 1) + + scale->rotation * 10;
477
478 line_dsc.color = line_color;
479 line_dsc.width = line_width;
480
481 /*Draw a little bit longer lines to be sure the mask will clip them correctly
482 *and to get a better precision*/
483 lv_point_t p_outer;
484 p_outer.x = p_center.x + r_out + LV_MAX(LV_DPI_DEF, r_out);
485 p_outer.y = p_center.y;
486 lv_point_transform(&p_outer, angle_upscale, 256, &p_center);
487
488 part_draw_dsc.p1 = &p_center;
489 part_draw_dsc.p2 = &p_outer;
490 part_draw_dsc.id = i;
491 part_draw_dsc.label_dsc = &label_dsc;
492
493 /*Draw the text*/
494 if(major) {
495 lv_draw_mask_remove_id(outer_mask_id);
496 uint32_t r_text = r_in_major - scale->label_gap;
497 lv_point_t p;
498 p.x = p_center.x + r_text;
499 p.y = p_center.y;
500 lv_point_transform(&p, angle_upscale, 256, &p_center);
501
502 lv_draw_label_dsc_t label_dsc_tmp;
503 lv_memcpy(&label_dsc_tmp, &label_dsc, sizeof(label_dsc_tmp));
504
505 part_draw_dsc.label_dsc = &label_dsc_tmp;
506 char buf[16];
507
508 lv_snprintf(buf, sizeof(buf), "%" LV_PRId32, value_of_line);
509 part_draw_dsc.text = buf;
510
511 lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
512
513 lv_point_t label_size;
514 lv_txt_get_size(&label_size, part_draw_dsc.text, label_dsc.font, label_dsc.letter_space, label_dsc.line_space,
515 LV_COORD_MAX, LV_TEXT_FLAG_NONE);
516
517 lv_area_t label_cord;
518 label_cord.x1 = p.x - label_size.x / 2;
519 label_cord.y1 = p.y - label_size.y / 2;
520 label_cord.x2 = label_cord.x1 + label_size.x;
521 label_cord.y2 = label_cord.y1 + label_size.y;
522
523 lv_draw_label(draw_ctx, part_draw_dsc.label_dsc, &label_cord, part_draw_dsc.text, NULL);
524
525 outer_mask_id = lv_draw_mask_add(&outer_mask, NULL);
526 }
527 else {
528 part_draw_dsc.label_dsc = NULL;
529 part_draw_dsc.text = NULL;
530 lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
531 }
532
533 inner_act_mask_id = lv_draw_mask_add(major ? &inner_major_mask : &inner_minor_mask, NULL);
534 lv_draw_line(draw_ctx, &line_dsc, &p_outer, &p_center);
535 lv_draw_mask_remove_id(inner_act_mask_id);
536 lv_event_send(obj, LV_EVENT_DRAW_MAIN_END, &part_draw_dsc);
537
538 line_dsc.color = line_color_ori;
539 line_dsc.width = line_width_ori;
540
541 }
542 lv_draw_mask_free_param(&inner_minor_mask);
543 lv_draw_mask_free_param(&inner_major_mask);
544 lv_draw_mask_free_param(&outer_mask);
545 lv_draw_mask_remove_id(outer_mask_id);
546 }
547 }
548
549
draw_needles(lv_obj_t * obj,lv_draw_ctx_t * draw_ctx,const lv_area_t * scale_area)550 static void draw_needles(lv_obj_t * obj, lv_draw_ctx_t * draw_ctx, const lv_area_t * scale_area)
551 {
552 lv_meter_t * meter = (lv_meter_t *)obj;
553
554 lv_coord_t r_edge = lv_area_get_width(scale_area) / 2;
555 lv_point_t scale_center;
556 scale_center.x = scale_area->x1 + r_edge;
557 scale_center.y = scale_area->y1 + r_edge;
558
559 lv_draw_line_dsc_t line_dsc;
560 lv_draw_line_dsc_init(&line_dsc);
561 lv_obj_init_draw_line_dsc(obj, LV_PART_ITEMS, &line_dsc);
562
563 lv_draw_img_dsc_t img_dsc;
564 lv_draw_img_dsc_init(&img_dsc);
565 lv_obj_init_draw_img_dsc(obj, LV_PART_ITEMS, &img_dsc);
566 lv_opa_t opa_main = lv_obj_get_style_opa(obj, LV_PART_MAIN);
567
568 lv_obj_draw_part_dsc_t part_draw_dsc;
569 lv_obj_draw_dsc_init(&part_draw_dsc, draw_ctx);
570 part_draw_dsc.class_p = MY_CLASS;
571 part_draw_dsc.p1 = &scale_center;
572
573 lv_meter_indicator_t * indic;
574 _LV_LL_READ_BACK(&meter->indicator_ll, indic) {
575 lv_meter_scale_t * scale = indic->scale;
576 part_draw_dsc.sub_part_ptr = indic;
577
578 if(indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_LINE) {
579 int32_t angle = lv_map(indic->end_value, scale->min, scale->max, scale->rotation, scale->rotation + scale->angle_range);
580 lv_coord_t r_out = r_edge + scale->r_mod + indic->type_data.needle_line.r_mod;
581 lv_point_t p_end;
582 p_end.y = (lv_trigo_sin(angle) * (r_out)) / LV_TRIGO_SIN_MAX + scale_center.y;
583 p_end.x = (lv_trigo_cos(angle) * (r_out)) / LV_TRIGO_SIN_MAX + scale_center.x;
584 line_dsc.color = indic->type_data.needle_line.color;
585 line_dsc.width = indic->type_data.needle_line.width;
586 line_dsc.opa = indic->opa > LV_OPA_MAX ? opa_main : (opa_main * indic->opa) >> 8;
587
588 part_draw_dsc.id = LV_METER_DRAW_PART_NEEDLE_LINE;
589 part_draw_dsc.line_dsc = &line_dsc;
590 part_draw_dsc.p2 = &p_end;
591
592 lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
593 lv_draw_line(draw_ctx, &line_dsc, &scale_center, &p_end);
594 lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc);
595 }
596 else if(indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_IMG) {
597 if(indic->type_data.needle_img.src == NULL) continue;
598
599 int32_t angle = lv_map(indic->end_value, scale->min, scale->max, scale->rotation, scale->rotation + scale->angle_range);
600 lv_img_header_t info;
601 lv_img_decoder_get_info(indic->type_data.needle_img.src, &info);
602 lv_area_t a;
603 a.x1 = scale_center.x - indic->type_data.needle_img.pivot.x;
604 a.y1 = scale_center.y - indic->type_data.needle_img.pivot.y;
605 a.x2 = a.x1 + info.w - 1;
606 a.y2 = a.y1 + info.h - 1;
607
608 img_dsc.opa = indic->opa > LV_OPA_MAX ? opa_main : (opa_main * indic->opa) >> 8;
609 img_dsc.pivot.x = indic->type_data.needle_img.pivot.x;
610 img_dsc.pivot.y = indic->type_data.needle_img.pivot.y;
611 angle = angle * 10;
612 if(angle > 3600) angle -= 3600;
613 img_dsc.angle = angle;
614
615 part_draw_dsc.id = LV_METER_DRAW_PART_NEEDLE_IMG;
616 part_draw_dsc.img_dsc = &img_dsc;
617
618 lv_event_send(obj, LV_EVENT_DRAW_PART_BEGIN, &part_draw_dsc);
619 lv_draw_img(draw_ctx, &img_dsc, &a, indic->type_data.needle_img.src);
620 lv_event_send(obj, LV_EVENT_DRAW_PART_END, &part_draw_dsc);
621 }
622 }
623 }
624
inv_arc(lv_obj_t * obj,lv_meter_indicator_t * indic,int32_t old_value,int32_t new_value)625 static void inv_arc(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t old_value, int32_t new_value)
626 {
627 bool rounded = lv_obj_get_style_arc_rounded(obj, LV_PART_ITEMS);
628
629 lv_area_t scale_area;
630 lv_obj_get_content_coords(obj, &scale_area);
631
632 lv_coord_t r_out = lv_area_get_width(&scale_area) / 2;
633 lv_point_t scale_center;
634 scale_center.x = scale_area.x1 + r_out;
635 scale_center.y = scale_area.y1 + r_out;
636
637 r_out += indic->type_data.arc.r_mod;
638
639 lv_meter_scale_t * scale = indic->scale;
640
641 int32_t start_angle = lv_map(old_value, scale->min, scale->max, scale->rotation, scale->angle_range + scale->rotation);
642 int32_t end_angle = lv_map(new_value, scale->min, scale->max, scale->rotation, scale->angle_range + scale->rotation);
643
644 lv_area_t a;
645 lv_draw_arc_get_area(scale_center.x, scale_center.y, r_out, LV_MIN(start_angle, end_angle), LV_MAX(start_angle,
646 end_angle), indic->type_data.arc.width, rounded, &a);
647 lv_obj_invalidate_area(obj, &a);
648 }
649
650
inv_line(lv_obj_t * obj,lv_meter_indicator_t * indic,int32_t value)651 static void inv_line(lv_obj_t * obj, lv_meter_indicator_t * indic, int32_t value)
652 {
653 lv_area_t scale_area;
654 lv_obj_get_content_coords(obj, &scale_area);
655
656 lv_coord_t r_out = lv_area_get_width(&scale_area) / 2;
657 lv_point_t scale_center;
658 scale_center.x = scale_area.x1 + r_out;
659 scale_center.y = scale_area.y1 + r_out;
660
661 lv_meter_scale_t * scale = indic->scale;
662
663 if(indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_LINE) {
664 int32_t angle = lv_map(value, scale->min, scale->max, scale->rotation, scale->rotation + scale->angle_range);
665 r_out += scale->r_mod + indic->type_data.needle_line.r_mod;
666 lv_point_t p_end;
667 p_end.y = (lv_trigo_sin(angle) * (r_out)) / LV_TRIGO_SIN_MAX + scale_center.y;
668 p_end.x = (lv_trigo_cos(angle) * (r_out)) / LV_TRIGO_SIN_MAX + scale_center.x;
669
670 lv_area_t a;
671 a.x1 = LV_MIN(scale_center.x, p_end.x) - indic->type_data.needle_line.width - 2;
672 a.y1 = LV_MIN(scale_center.y, p_end.y) - indic->type_data.needle_line.width - 2;
673 a.x2 = LV_MAX(scale_center.x, p_end.x) + indic->type_data.needle_line.width + 2;
674 a.y2 = LV_MAX(scale_center.y, p_end.y) + indic->type_data.needle_line.width + 2;
675
676 lv_obj_invalidate_area(obj, &a);
677 }
678 else if(indic->type == LV_METER_INDICATOR_TYPE_NEEDLE_IMG) {
679 int32_t angle = lv_map(value, scale->min, scale->max, scale->rotation, scale->rotation + scale->angle_range);
680 lv_img_header_t info;
681 lv_img_decoder_get_info(indic->type_data.needle_img.src, &info);
682
683 angle = angle * 10;
684 if(angle > 3600) angle -= 3600;
685
686 scale_center.x -= indic->type_data.needle_img.pivot.x;
687 scale_center.y -= indic->type_data.needle_img.pivot.y;
688 lv_area_t a;
689 _lv_img_buf_get_transformed_area(&a, info.w, info.h, angle, LV_IMG_ZOOM_NONE, &indic->type_data.needle_img.pivot);
690 a.x1 += scale_center.x - 2;
691 a.y1 += scale_center.y - 2;
692 a.x2 += scale_center.x + 2;
693 a.y2 += scale_center.y + 2;
694
695 lv_obj_invalidate_area(obj, &a);
696 }
697 }
698 #endif
699
