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Description
What MCU/Processor/Board and compiler are you using?
ESP32-S3
What LVGL version are you using?
v8.3.2
What do you want to achieve?
Display values in a point location in a chart
What have you tried so far?
Attempted to import coordinate values with function lv_chart_get_point_pos_by_id().
However, the coordinate values are expressed strangely.
Code to reproduce
Add a code snippet which can run in the simulator. It should contain only the relevant code that compiles without errors when separated from your main code base.
The code block(s) should be formatted like:
/*You code here*/
lv_obj_t * panel1 = lv_obj_create(lv_scr_act());
lv_obj_remove_style_all(panel1);
lv_obj_set_size(panel1, 420, 380);
lv_obj_set_pos(panel1, 60, 0);
lv_obj_add_style(panel1, &Weather_Value_Style, 0);
lv_obj_set_scroll_dir(panel1, LV_DIR_LEFT | LV_DIR_RIGHT);
static lv_style_t chart_style;
lv_style_init(&chart_style);
lv_style_set_border_color(&chart_style, lv_color_white());
lv_obj_t * chart;
chart = lv_chart_create(panel1);
lv_chart_set_div_line_count(chart, 0, 0);
lv_obj_set_pos(chart, 15, 130);
lv_obj_add_style(chart, &chart_style, 0);
lv_chart_series_t * ser1 = lv_chart_add_series(chart, lv_palette_main(LV_PALETTE_BLUE), LV_CHART_AXIS_PRIMARY_Y);
lv_chart_set_point_count(chart, 72);
lv_chart_set_type(chart, LV_CHART_TYPE_LINE);
int Axis_X = -180;
for(int i = 0; i < 72; i++){
if(i != 0)Axis_X += 60;
lv_obj_t *Weather_Value_Time_Text = lv_label_create(panel1);
lv_label_set_text_fmt(Weather_Value_Time_Text, "%d시", Hour_data[i]);
lv_obj_set_style_text_align(Weather_Value_Time_Text, LV_TEXT_ALIGN_CENTER, 0);
lv_obj_align(Weather_Value_Time_Text, LV_ALIGN_CENTER, Axis_X, -140);
lv_obj_t *Weather_Value_Img = lv_img_create(panel1);
if(Weather_data[i] == 1){
if(Hour_data[i] < 8 || Hour_data[i] > 17)lv_img_set_src(Weather_Value_Img, &Clear_N);
else lv_img_set_src(Weather_Value_Img, &Clear_S);
}
if(Weather_data[i] == 2){
if(Hour_data[i] < 8 || Hour_data[i] > 17)lv_img_set_src(Weather_Value_Img, &Mostly_Cloudy_N);
else lv_img_set_src(Weather_Value_Img, &Mostly_Cloudy_S);
}
if(Weather_data[i] == 3)lv_img_set_src(Weather_Value_Img, &Cloudy);
if(Weather_data[i] == 4)lv_img_set_src(Weather_Value_Img, &Rain);
if(Weather_data[i] == 5)lv_img_set_src(Weather_Value_Img, &Rain_Snow);
if(Weather_data[i] == 6)lv_img_set_src(Weather_Value_Img, &Snow);
if(Weather_data[i] == 7)lv_img_set_src(Weather_Value_Img, &shower);
if(Weather_data[i] == 8)lv_img_set_src(Weather_Value_Img, &Raindrop);
if(Weather_data[i] == 9)lv_img_set_src(Weather_Value_Img, &Raindrop_Snow);
if(Weather_data[i] == 10)lv_img_set_src(Weather_Value_Img, &Snow_Drifting);
lv_obj_align(Weather_Value_Img, LV_ALIGN_CENTER, Axis_X, -90);
lv_chart_set_next_value(chart, ser1, Temp_data[i]);
lv_obj_t *Weather_Value_Humidity_Text = lv_label_create(panel1);
lv_label_set_text_fmt(Weather_Value_Humidity_Text, "%d%%", Humidity_data[i]);
lv_obj_set_style_text_align(Weather_Value_Humidity_Text, LV_TEXT_ALIGN_CENTER, 0);
lv_obj_align(Weather_Value_Humidity_Text, LV_ALIGN_CENTER, Axis_X, 60);
lv_obj_t *Weather_Value_Rain_Text = lv_label_create(panel1);
float rain = Rain_data[i];
if(rain == 0)lv_label_set_text(Weather_Value_Rain_Text, "-");
if(rain > 0 && rain < 1)lv_label_set_text(Weather_Value_Rain_Text, "~1");
if(rain >= 1){
char rain_str[10];
if (rain == static_cast<int>(rain))snprintf(rain_str, sizeof(rain_str), "%d", static_cast<int>(rain));
else dtostrf(rain, 4, 1, rain_str);
const char* rain_const = rain_str;
lv_label_set_text(Weather_Value_Rain_Text, rain_const);
}
lv_obj_set_style_text_align(Weather_Value_Rain_Text, LV_TEXT_ALIGN_CENTER, 0);
lv_obj_align(Weather_Value_Rain_Text, LV_ALIGN_CENTER, Axis_X, 110);
lv_obj_t *Weather_Value_Rain_Per_Text = lv_label_create(panel1);
lv_label_set_text_fmt(Weather_Value_Rain_Per_Text, "%d%%", Rain_Per_data[i]);
lv_obj_set_style_text_align(Weather_Value_Rain_Per_Text, LV_TEXT_ALIGN_CENTER, 0);
lv_obj_align(Weather_Value_Rain_Per_Text, LV_ALIGN_CENTER, Axis_X, 160);
}
lv_chart_set_range(chart, LV_CHART_AXIS_PRIMARY_Y, low_temp, high_temp + 5);
lv_obj_set_size(chart, Axis_X+200, 110);
lv_chart_refresh(chart);
for(int i = 0; i < 72; i++){
lv_point_t p;
lv_chart_get_point_pos_by_id(chart, ser1, i, &p);
Serial0.print(“i:”);Serial0.print(i);
Serial0.print(“, x:”);Serial0.print(p.x);
Serial0.print(“, y:”);Serial0.println(p.y);
lv_obj_t *Weather_Temp_Text = lv_label_create(chart);
lv_label_set_text_fmt(Weather_Temp_Text, “%d”, Temp_data[i]);
lv_obj_set_style_text_align(Weather_Temp_Text, LV_TEXT_ALIGN_CENTER, 0);
lv_obj_set_pos(Weather_Temp_Text,p.x,p.y);
}
Serial print
i:0, x:12, y:3
i:1, x:12, y:3
i:2, x:12, y:1
i:3, x:11, y:1
i:4, x:11, y:0
i:5, x:11, y:-2
i:6, x:10, y:-2
i:7, x:10, y:-4
i:8, x:10, y:-6
i:9, x:9, y:-6
i:10, x:9, y:-6
i:11, x:9, y:-6
i:12, x:8, y:-6
i:13, x:8, y:-6
i:14, x:8, y:-6
i:15, x:7, y:-4
i:16, x:7, y:-6
i:17, x:7, y:-6
i:18, x:6, y:-6
i:19, x:6, y:-7
i:20, x:6, y:-7
i:21, x:5, y:-9
i:22, x:5, y:-7
i:23, x:5, y:-7
i:24, x:4, y:-9
i:25, x:4, y:-9
i:26, x:4, y:-9
i:27, x:3, y:-9
i:28, x:3, y:-11
i:29, x:3, y:-11
i:30, x:2, y:-11
i:31, x:2, y:-11
i:32, x:2, y:-11
i:33, x:1, y:-12
i:34, x:1, y:-11
i:35, x:1, y:-11
i:36, x:0, y:-9
i:37, x:0, y:-7
i:38, x:0, y:-7
i:39, x:-1, y:-6
i:40, x:-1, y:-6
i:41, x:-1, y:-7
i:42, x:-2, y:-7
i:43, x:-2, y:-9
i:44, x:-2, y:-9
i:45, x:-3, y:-9
i:46, x:-3, y:-9
i:47, x:-3, y:-9
i:48, x:-4, y:-11
i:49, x:-4, y:-11
i:50, x:-4, y:-11
i:51, x:-5, y:-11
i:52, x:-5, y:-12
i:53, x:-5, y:-12
i:54, x:-6, y:-12
i:55, x:-6, y:-12
i:56, x:-6, y:-12
i:57, x:-7, y:-12
i:58, x:-7, y:-11
i:59, x:-7, y:-9
i:60, x:-8, y:-7
i:61, x:-8, y:-6
i:62, x:-8, y:-4
i:63, x:-9, y:-4
i:64, x:-9, y:-4
i:65, x:-9, y:-4
i:66, x:-10, y:-4
i:67, x:-10, y:-6
i:68, x:-10, y:-7
i:69, x:-11, y:-7
i:70, x:-11, y:-9
i:71, x:-12, y:-11