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/lvgl-latest/src/others/observer/
Dlv_observer.c34 static void group_notify_cb(lv_observer_t * observer, lv_subject_t * subject);
35 static lv_observer_t * bind_to_bitfield(lv_subject_t * subject, lv_obj_t * obj, lv_observer_cb_t cb…
37 static void obj_flag_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
38 static void obj_state_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
42 static void label_text_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
47 static void arc_value_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
52 static void slider_value_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
57 static void roller_value_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
62 static void dropdown_value_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
77 void lv_subject_init_int(lv_subject_t * subject, int32_t value) in lv_subject_init_int() argument
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Dlv_observer.h68 typedef void (*lv_observer_cb_t)(lv_observer_t * observer, lv_subject_t * subject);
79 void lv_subject_init_int(lv_subject_t * subject, int32_t value);
86 void lv_subject_set_int(lv_subject_t * subject, int32_t value);
93 int32_t lv_subject_get_int(lv_subject_t * subject);
100 int32_t lv_subject_get_previous_int(lv_subject_t * subject);
111 void lv_subject_init_string(lv_subject_t * subject, char * buf, char * prev_buf, size_t size, const…
118 void lv_subject_copy_string(lv_subject_t * subject, const char * buf);
125 void lv_subject_snprintf(lv_subject_t * subject, const char * format, ...) LV_FORMAT_ATTRIBUTE(2, 3…
132 const char * lv_subject_get_string(lv_subject_t * subject);
141 const char * lv_subject_get_previous_string(lv_subject_t * subject);
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Dlv_observer_private.h33 lv_subject_t * subject; /**< The observed value */ member
/lvgl-latest/tests/src/test_cases/
Dtest_observer.c22 static void observer_int(lv_observer_t * observer, lv_subject_t * subject) in observer_int() argument
25 prev_v = lv_subject_get_previous_int(subject); in observer_int()
26 current_v = lv_subject_get_int(subject); in observer_int()
31 static lv_subject_t subject; in test_observer_add_remove() local
32 lv_subject_init_int(&subject, 5); in test_observer_add_remove()
34 lv_observer_t * observer = lv_subject_add_observer(&subject, observer_int, NULL); in test_observer_add_remove()
37 lv_subject_set_int(&subject, 10); in test_observer_add_remove()
38 TEST_ASSERT_EQUAL(10, lv_subject_get_int(&subject)); in test_observer_add_remove()
42 lv_subject_set_int(&subject, 15); in test_observer_add_remove()
43 TEST_ASSERT_EQUAL(15, lv_subject_get_int(&subject)); in test_observer_add_remove()
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Dtest_bindings.c10 static void chart_type_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
197 static void chart_type_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in chart_type_observer_cb() argument
199 int32_t v = lv_subject_get_int(subject); in chart_type_observer_cb()
/lvgl-latest/docs/details/other-components/
Dobserver.rst35 //Initialize the subject as integer with the default value of 10
47 //Will be called when the related subject's value changes
48 static void some_observer_cb(lv_observer_t * observer, lv_subject_t * subject)
50 int32_t v = lv_subject_get_int(subject);
56 //Subscribe to a subject
68 //Set the subject's value to 30. It will notify `some_observer_cb`
83 To initialize a subject use ``lv_subject_init_<type>(&subject, params, init_value)``.
86 - **Integer** ``void lv_subject_init_int(lv_subject_t * subject, int32_t value)``
87 - **String** ``void lv_subject_init_string(lv_subject_t * subject, char * buf, char * prev_buf, siz…
88 - **Pointer** ``void lv_subject_init_pointer(lv_subject_t * subject, void * value)``
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/lvgl-latest/scripts/
Dchangelog-template.hbs12 - .. warning: {{subject}} `{{shorthash}} <{{href}}>`__
15 - **{{commit.subject}}** `{{commit.shorthash}} <{{commit.href}}>`__
25 - **{{subject}}** `{{shorthash}} <{{href}}>`__
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67 - **{{commit.subject}}** `{{commit.shorthash}} <{{commit.href}}>`__
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/lvgl-latest/examples/others/observer/
Dlv_example_observer_3.c18 static void hour_roller_options_update(lv_observer_t * observer, lv_subject_t * subject);
19 static void time_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
121 static void time_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in time_observer_cb() argument
123 int32_t hour = lv_subject_get_int(lv_subject_get_group_element(subject, 0)); in time_observer_cb()
124 int32_t minute = lv_subject_get_int(lv_subject_get_group_element(subject, 1)); in time_observer_cb()
125 int32_t format = lv_subject_get_int(lv_subject_get_group_element(subject, 2)); in time_observer_cb()
126 int32_t am_pm = lv_subject_get_int(lv_subject_get_group_element(subject, 3)); in time_observer_cb()
139 static void hour_roller_options_update(lv_observer_t * observer, lv_subject_t * subject) in hour_roller_options_update() argument
143 int32_t v = lv_subject_get_int(subject); in hour_roller_options_update()
Dlv_example_observer_4.c4 static void cont_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
7 static void btn_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
8 static void indicator_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
77 static void cont_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in cont_observer_cb() argument
79 int32_t prev_v = lv_subject_get_previous_int(subject); in cont_observer_cb()
80 int32_t cur_v = lv_subject_get_int(subject); in cont_observer_cb()
173 static void btn_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in btn_observer_cb() argument
175 int32_t prev_v = lv_subject_get_previous_int(subject); in btn_observer_cb()
176 int32_t cur_v = lv_subject_get_int(subject); in btn_observer_cb()
185 static void indicator_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in indicator_observer_cb() argument
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Dlv_example_observer_5.c13 static void fw_upload_manager_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
16 static void fw_update_win_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
76 static void fw_update_win_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in fw_update_win_observer_cb() argument
91 lv_subject_set_int(subject, FW_UPDATE_STATE_CONNECTING); in fw_update_win_observer_cb()
151 static void fw_upload_manager_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in fw_upload_manager_observer_cb() argument
153 LV_UNUSED(subject); in fw_upload_manager_observer_cb()
Dlv_example_observer_2.c28 static void engine_state_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in engine_state_observer_cb() argument
32 int32_t v = lv_subject_get_int(subject); in engine_state_observer_cb()
70 static void info_label_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in info_label_observer_cb() argument
73 switch(lv_subject_get_int(subject)) { in info_label_observer_cb()
Dlv_example_observer_6.c59 static void my_panel_style_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in my_panel_style_observer_cb() argument
61 LV_UNUSED(subject); in my_panel_style_observer_cb()
129 static void my_button_style_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in my_button_style_observer_cb() argument
131 LV_UNUSED(subject); in my_button_style_observer_cb()
/lvgl-latest/demos/high_res/
Dlv_demo_high_res_top_margin.c31 static lv_obj_t * create_icon(lv_obj_t * parent, lv_subject_t * subject, lv_image_dsc_t ** img_dsc_…
36 static void wifi_ssid_ip_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
38 static void wifi_icon_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
41 static void perfmon_data_cb(lv_observer_t * observer, lv_subject_t * subject);
46 static void date_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
47 static void time_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
152 static lv_obj_t * create_icon(lv_obj_t * parent, lv_subject_t * subject, lv_image_dsc_t ** img_dsc_… in create_icon() argument
157 subject->user_data = icon; in create_icon()
181 lv_subject_t * subject = icon_subjects[i]; in icon_clicked_cb() local
182 lv_obj_t * icon = subject->user_data; in icon_clicked_cb()
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Dlv_demo_high_res_api_example.c26 static void output_subject_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
27 static void locked_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
90 static void output_subject_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in output_subject_observer_cb() argument
93 LV_LOG_USER("%s output subject value: %"PRId32, subject_name, lv_subject_get_int(subject)); in output_subject_observer_cb()
96 static void locked_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in locked_observer_cb() argument
98 if(lv_subject_get_int(subject)) { in locked_observer_cb()
103 lv_timer_set_user_data(timer, subject); in locked_observer_cb()
Dlv_demo_high_res_home.c31 static void theme_observer_accent_span_cb(lv_observer_t * observer, lv_subject_t * subject);
37 static void time_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
38 static void date_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
39 static void hi_lo_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
218 static void theme_observer_accent_span_cb(lv_observer_t * observer, lv_subject_t * subject) in theme_observer_accent_span_cb() argument
221 const lv_demo_high_res_theme_t * th = lv_subject_get_pointer(subject); in theme_observer_accent_span_cb()
296 static void time_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in time_observer_cb() argument
298 LV_UNUSED(subject); in time_observer_cb()
311 static void date_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in date_observer_cb() argument
313 LV_UNUSED(subject); in date_observer_cb()
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Dlv_demo_high_res_util.c65 static void theme_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
67 static void label_text_temperature_cb(lv_observer_t * observer, lv_subject_t * subject);
394 void lv_demo_high_res_label_bind_temperature(lv_obj_t * label, lv_subject_t * subject, lv_demo_high… in lv_demo_high_res_label_bind_temperature() argument
397 lv_subject_add_observer_obj(subject, label_text_temperature_cb, label, subject); in lv_demo_high_res_label_bind_temperature()
398 …ect_add_observer_obj(&c->temperature_units_are_celsius, label_text_temperature_cb, label, subject); in lv_demo_high_res_label_bind_temperature()
401 void lv_demo_high_res_theme_observer_image_src_cb(lv_observer_t * observer, lv_subject_t * subject) in lv_demo_high_res_theme_observer_image_src_cb() argument
406 const lv_demo_high_res_theme_t * th = lv_subject_get_pointer(subject); in lv_demo_high_res_theme_observer_image_src_cb()
416 …_demo_high_res_theme_observer_obj_bg_image_src_cb(lv_observer_t * observer, lv_subject_t * subject) in lv_demo_high_res_theme_observer_obj_bg_image_src_cb() argument
421 const lv_demo_high_res_theme_t * th = lv_subject_get_pointer(subject); in lv_demo_high_res_theme_observer_obj_bg_image_src_cb()
522 static void theme_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in theme_observer_cb() argument
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Dlv_demo_high_res_app_smart_home.c32 static void charging_arc_observer(lv_observer_t * observer, lv_subject_t * subject);
33 static void charging_percent_label_observer(lv_observer_t * observer, lv_subject_t * subject);
34 …tic void charging_time_until_full_label_observer(lv_observer_t * observer, lv_subject_t * subject);
37 static void widget2_slider_locked_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
182 static void charging_arc_observer(lv_observer_t * observer, lv_subject_t * subject) in charging_arc_observer() argument
185 lv_arc_set_value(arc, lv_map(lv_subject_get_int(subject), 0, EV_CHARGING_RANGE_END, 0, 100)); in charging_arc_observer()
188 static void charging_percent_label_observer(lv_observer_t * observer, lv_subject_t * subject) in charging_percent_label_observer() argument
191 …lv_label_set_text_fmt(label, "%"LV_PRId32"%%", lv_map(lv_subject_get_int(subject), 0, EV_CHARGING_… in charging_percent_label_observer()
194 …atic void charging_time_until_full_label_observer(lv_observer_t * observer, lv_subject_t * subject) in charging_time_until_full_label_observer() argument
197 …int32_t v_range_time_to_full = lv_map(lv_subject_get_int(subject), 0, EV_CHARGING_RANGE_END, 72, 0… in charging_time_until_full_label_observer()
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Dlv_demo_high_res_private.h233 void lv_demo_high_res_label_bind_temperature(lv_obj_t * label, lv_subject_t * subject, lv_demo_high…
234 void lv_demo_high_res_theme_observer_image_src_cb(lv_observer_t * observer, lv_subject_t * subject);
235 …demo_high_res_theme_observer_obj_bg_image_src_cb(lv_observer_t * observer, lv_subject_t * subject);
/lvgl-latest/src/others/sysmon/
Dlv_sysmon.c42 static void perf_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
48 static void mem_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
68 lv_subject_init_pointer(&sysmon_mem.subject, &mem_info); in lv_sysmon_builtin_init()
115 lv_subject_init_pointer(&disp->perf_sysmon_backend.subject, &disp->perf_sysmon_info); in lv_sysmon_show_performance()
117 …lv_subject_add_observer_obj(&disp->perf_sysmon_backend.subject, perf_observer_cb, disp->perf_label… in lv_sysmon_show_performance()
160 lv_subject_add_observer_obj(&sysmon_mem.subject, mem_observer_cb, disp->mem_label, NULL); in lv_sysmon_show_memory()
229 lv_subject_deinit(&disp->perf_sysmon_backend.subject); in perf_monitor_disp_event_cb()
270 lv_subject_set_pointer(&disp->perf_sysmon_backend.subject, info); in perf_update_timer_cb()
282 static void perf_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in perf_observer_cb() argument
285 const lv_sysmon_perf_info_t * perf = lv_subject_get_pointer(subject); in perf_observer_cb()
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Dlv_sysmon_private.h30 lv_subject_t subject; member
/lvgl-latest/examples/libs/tiny_ttf/
Dlv_example_tiny_ttf_3.c4 static void font_size_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
45 static void font_size_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in font_size_observer_cb() argument
51 int32_t size = lv_subject_get_int(subject); in font_size_observer_cb()
/lvgl-latest/demos/ebike/
Dlv_demo_ebike_stats.c195 static void current_week_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in current_week_observer_cb() argument
197 LV_UNUSED(subject); in current_week_observer_cb()
210 static void current_data_objserver_cb(lv_observer_t * observer, lv_subject_t * subject) in current_data_objserver_cb() argument
212 LV_UNUSED(subject); in current_data_objserver_cb()
416 static void chart_week_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in chart_week_observer_cb() argument
418 LV_UNUSED(subject); in chart_week_observer_cb()
430 static void chart_mode_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in chart_mode_observer_cb() argument
432 LV_UNUSED(subject); in chart_mode_observer_cb()
454 static void chart_day_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in chart_day_observer_cb() argument
456 LV_UNUSED(subject); in chart_day_observer_cb()
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Dlv_demo_ebike_settings.c129 static lv_obj_t * switch_create(lv_obj_t * parent, const char * title, lv_subject_t * subject) in switch_create() argument
156 if(subject) lv_button_bind_checked(sw, subject); in switch_create()
162 …ropdown_create(lv_obj_t * parent, const char * title, const char * options, lv_subject_t * subject) in dropdown_create() argument
187 lv_dropdown_bind_value(dd, subject); in dropdown_create()
Dlv_demo_ebike.c31 static void language_observer_cb(lv_observer_t * observer, lv_subject_t * subject);
202 static void language_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in language_observer_cb() argument
207 uint32_t lang_new = lv_subject_get_int(subject); in language_observer_cb()
Dlv_demo_ebike_home.c117 static void speed_label_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in speed_label_observer_cb() argument
121 int32_t speed = lv_subject_get_int(subject); in speed_label_observer_cb()
128 static void speed_roller_10_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in speed_roller_10_observer_cb() argument
131 int32_t speed = lv_subject_get_int(subject); in speed_roller_10_observer_cb()
135 static void speed_roller_1_observer_cb(lv_observer_t * observer, lv_subject_t * subject) in speed_roller_1_observer_cb() argument
138 int32_t speed = lv_subject_get_int(subject); in speed_roller_1_observer_cb()

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