feat(ui): 重构设置界面为页面控制器架构

- 添加新的UI页面基础架构(ui_page.h)，包含页面操作接口
- 创建设置页面控制器(ui_settings_controller.h/.c)来管理页面导航
- 实现具体的设置页面类型：根页面、BLE页面、主题页面
- 修改display_module.c以使用新的页面系统替代旧的状态机
- 移除过时的settings_ui.h头文件和相关状态结构
- 更新事件处理逻辑以使用页面指针而非状态数据传递
- 修改主界面实现以适配统一的页面接口标准

CMakeLists.txt

@@ -35,7 +35,13 @@ target_sources(app PRIVATE
   src/led_strip_module.c
   src/mode_policy_module.c
   src/time_sync_module.c
+  src/settings_module.c
   src/ui/ui_main.c
+  src/ui/ui_settings.c
+  src/ui/ui_settings_controller.c
+  src/ui/ui_settings_root.c
+  src/ui/ui_settings_ble.c
+  src/ui/ui_settings_theme.c
   src/protocol_module.c
   src/usb_cdc_module.c
   src/usb_device_module.c
@@ -58,6 +64,8 @@ target_sources(app PRIVATE
   src/events/proto_transport_state_event.c
   src/events/proto_tx_event.c
   src/events/set_protocol_event.c
+  src/events/settings_mode_event.c
+  src/events/settings_view_event.c
   src/events/theme_rgb_update_event.c
   src/events/time_sync_event.c
   src/events/transport_policy_event.c

inc/events/settings_mode_event.h

@@ -0,0 +1,30 @@
+#ifndef BLINKY_SETTINGS_MODE_EVENT_H_
+#define BLINKY_SETTINGS_MODE_EVENT_H_
+
+#include <app_event_manager.h>
+#include <app_event_manager_profiler_tracer.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct settings_mode_event {
+	struct app_event_header header;
+	bool active;
+};
+
+APP_EVENT_TYPE_DECLARE(settings_mode_event);
+
+static inline void submit_settings_mode_event(bool active)
+{
+	struct settings_mode_event *event = new_settings_mode_event();
+
+	event->active = active;
+	APP_EVENT_SUBMIT(event);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BLINKY_SETTINGS_MODE_EVENT_H_ */

inc/events/settings_view_event.h

@@ -0,0 +1,35 @@
+#ifndef BLINKY_SETTINGS_VIEW_EVENT_H_
+#define BLINKY_SETTINGS_VIEW_EVENT_H_
+
+#include <app_event_manager.h>
+#include <app_event_manager_profiler_tracer.h>
+
+#include "ui/ui_settings_page.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct settings_view_event {
+	struct app_event_header header;
+	struct ui_settings_page *page;
+	bool animate;
+};
+
+APP_EVENT_TYPE_DECLARE(settings_view_event);
+
+static inline void submit_settings_view_event(struct ui_settings_page *page,
+					      bool animate)
+{
+	struct settings_view_event *event = new_settings_view_event();
+
+	event->page = page;
+	event->animate = animate;
+	APP_EVENT_SUBMIT(event);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BLINKY_SETTINGS_VIEW_EVENT_H_ */

inc/ui/ui_page.h

@@ -0,0 +1,66 @@
+#ifndef BLINKY_UI_PAGE_H_
+#define BLINKY_UI_PAGE_H_
+
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct ui_page;
+
+struct ui_page_ops {
+	void (*init)(struct ui_page *page);
+	void (*deinit)(struct ui_page *page);
+	void (*refresh)(struct ui_page *page);
+};
+
+struct ui_page {
+	const struct ui_page_ops *ops;
+	struct ui_page *parent;
+	bool initialized;
+};
+
+static inline void ui_page_init(struct ui_page *page)
+{
+	if ((page == NULL) || (page->ops == NULL)) {
+		return;
+	}
+
+	if (page->initialized) {
+		return;
+	}
+
+	if (page->ops->init != NULL) {
+		page->ops->init(page);
+	}
+	page->initialized = true;
+}
+
+static inline void ui_page_deinit(struct ui_page *page)
+{
+	if ((page == NULL) || !page->initialized || (page->ops == NULL)) {
+		return;
+	}
+
+	if (page->ops->deinit != NULL) {
+		page->ops->deinit(page);
+	}
+	page->initialized = false;
+}
+
+static inline void ui_page_refresh(struct ui_page *page)
+{
+	if ((page == NULL) || !page->initialized ||
+	    (page->ops == NULL) || (page->ops->refresh == NULL)) {
+		return;
+	}
+
+	page->ops->refresh(page);
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BLINKY_UI_PAGE_H_ */

inc/ui/ui_settings_controller.h

@@ -0,0 +1,38 @@
+#ifndef BLINKY_UI_SETTINGS_CONTROLLER_H_
+#define BLINKY_UI_SETTINGS_CONTROLLER_H_
+
+#include <stdbool.h>
+#include <stdint.h>
+
+#include "theme_color.h"
+#include "ui_page.h"
+#include "ui_settings_page.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void ui_settings_controller_open(void);
+void ui_settings_controller_close(void);
+bool ui_settings_controller_back(void);
+void ui_settings_controller_select(void);
+void ui_settings_controller_move(int8_t delta);
+void ui_settings_controller_refresh(bool animate);
+bool ui_settings_controller_is_active(void);
+
+void ui_settings_controller_switch_to(struct ui_settings_page *page,
+				      struct ui_page *parent);
+
+const char *ui_settings_ble_current_label(void);
+const char *ui_settings_ble_slot_label(uint8_t slot);
+void ui_settings_ble_select_slot(uint8_t slot);
+void ui_settings_ble_erase_current(void);
+void ui_settings_theme_set_current(struct theme_rgb theme);
+const char *ui_settings_theme_current_name(void);
+uint8_t ui_settings_theme_current_index(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BLINKY_UI_SETTINGS_CONTROLLER_H_ */

inc/ui/ui_settings_page.h

@@ -0,0 +1,56 @@
+#ifndef BLINKY_UI_SETTINGS_PAGE_H_
+#define BLINKY_UI_SETTINGS_PAGE_H_
+
+#include <stdint.h>
+
+#include <lvgl.h>
+
+#include "ui_page.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct ui_settings_page;
+struct ui_settings_item;
+
+typedef void (*ui_settings_item_draw_fn)(const struct ui_settings_item *item,
+					 lv_obj_t *container);
+
+struct ui_settings_item {
+	const char *icon;
+	const char *title;
+	const char *value;
+	ui_settings_item_draw_fn draw;
+	void *user_data;
+};
+
+struct ui_settings_page_ops {
+	struct ui_page_ops base;
+
+	uint8_t (*get_count)(struct ui_settings_page *page);
+	void (*get_item)(struct ui_settings_page *page, uint8_t index,
+			 struct ui_settings_item *item);
+	void (*on_enter)(struct ui_settings_page *page);
+	void (*on_select)(struct ui_settings_page *page, uint8_t index);
+	void (*on_back)(struct ui_settings_page *page);
+};
+
+struct ui_settings_page {
+	struct ui_page base;
+	const struct ui_settings_page_ops *ops;
+	const char *title;
+	const char *hint;
+	uint8_t selected;
+};
+
+static inline struct ui_settings_page *ui_page_to_settings(struct ui_page *page)
+{
+	return (struct ui_settings_page *)page;
+}
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BLINKY_UI_SETTINGS_PAGE_H_ */

prj.conf

@@ -3,6 +3,7 @@ CONFIG_CAF_BUTTONS=y
 CONFIG_CAF_BUTTONS_DEF_PATH="buttons_def.h"
 CONFIG_CAF_CLICK_DETECTOR=y
 CONFIG_CAF_CLICK_DETECTOR_DEF_PATH="click_detector_def.h"
+CONFIG_CAF_CLICK_DETECTOR_LONG_CLICK_MSEC=1500
 CONFIG_GPIO=y
 CONFIG_I2C=y
 CONFIG_LED=y
@@ -110,10 +111,6 @@ CONFIG_CAF_BLE_ADV_FAST_ADV=y
 CONFIG_CAF_BLE_ADV_FILTER_ACCEPT_LIST=y
 CONFIG_CAF_BLE_ADV_MODULE_SUSPEND_EVENTS=y
 CONFIG_CAF_BLE_BOND=y
-CONFIG_CAF_BLE_BOND_PEER_ERASE_CLICK=y
-CONFIG_CAF_BLE_BOND_PEER_ERASE_CLICK_KEY_ID=0x180
-CONFIG_CAF_BLE_BOND_PEER_ERASE_CLICK_LONG=y
-CONFIG_CAF_BLE_BOND_PEER_ERASE_CLICK_TIMEOUT=-1
 CONFIG_CAF_MODULE_SUSPEND_EVENTS=y
 CONFIG_BT_ADV_PROV_FLAGS=y
 CONFIG_BT_ADV_PROV_GAP_APPEARANCE=y
@@ -131,7 +128,7 @@ CONFIG_LV_COLOR_16_SWAP=y
 CONFIG_LV_Z_BITS_PER_PIXEL=16
 CONFIG_LV_Z_VDB_SIZE=25
 CONFIG_LV_Z_DOUBLE_VDB=y
-CONFIG_LV_Z_MEM_POOL_SIZE=16384
+CONFIG_LV_Z_MEM_POOL_SIZE=32768
 CONFIG_LV_USE_LABEL=y
 CONFIG_LV_FONT_MONTSERRAT_14=y
 CONFIG_LV_FONT_MONTSERRAT_32=y

src/display_module.c

@@ -18,9 +18,13 @@
 #include "hid_led_event.h"
 #include "module_lifecycle.h"
 #include "mode_switch_event.h"
+#include "settings_mode_event.h"
+#include "settings_view_event.h"
 #include "theme_rgb_update_event.h"
 #include "theme_color.h"
+#include "ui/ui_page.h"
 #include "ui/ui_main.h"
+#include "ui/ui_settings.h"
 
 LOG_MODULE_REGISTER(MODULE, LOG_LEVEL_INF);
 
@@ -34,6 +38,8 @@ struct display_module_ctx {
 	const struct device *backlight_dev;
 	uint32_t backlight_idx;
 	struct ui_main_model ui_model;
+	struct ui_settings_page *settings_page;
+	bool settings_active;
 	bool lvgl_initialized;
 	char date_text[DATETIME_EVENT_DATE_TEXT_LEN];
 	char time_text[DATETIME_EVENT_TIME_TEXT_LEN];
@@ -74,6 +80,11 @@ static struct display_module_ctx ctx = {
 	.time_text = "00:00:00",
 };
 
+static struct ui_page *main_page(void)
+{
+	return ui_main_page_get(&ctx.ui_model, ctx.date_text, ctx.time_text);
+}
+
 static int backlight_set(bool on)
 {
 	if (on) {
@@ -126,10 +137,16 @@ static int do_start(void)
 		ctx.lvgl_initialized = true;
 
 		lvgl_lock();
-		ui_main_init(&ctx.ui_model, ctx.date_text, ctx.time_text);
+		ui_page_init(main_page());
 		lvgl_unlock();
 	}
 
+	lvgl_lock();
+	if (!ctx.settings_active) {
+		ui_page_init(main_page());
+	}
+	lvgl_unlock();
+
 	err = backlight_set(true);
 	if (err) {
 		LOG_ERR("Backlight enable failed (%d)", err);
@@ -168,7 +185,11 @@ static void refresh_ui(void)
 	}
 
 	lvgl_lock();
-	ui_main_refresh_all(&ctx.ui_model, ctx.date_text, ctx.time_text);
+	if (ctx.settings_active && (ctx.settings_page != NULL)) {
+		ui_settings_show(ctx.settings_page, true);
+	} else {
+		ui_page_refresh(main_page());
+	}
 	lvgl_unlock();
 }
 
@@ -211,6 +232,48 @@ static bool app_event_handler(const struct app_event_header *aeh)
 		return false;
 	}
 
+	if (is_settings_mode_event(aeh)) {
+		const struct settings_mode_event *event =
+			cast_settings_mode_event(aeh);
+
+		ctx.settings_active = event->active;
+		if (!ctx.settings_active) {
+			ctx.settings_page = NULL;
+		}
+		if (!ctx.lvgl_initialized) {
+			return false;
+		}
+
+		lvgl_lock();
+		if (ctx.settings_active) {
+			ui_page_deinit(main_page());
+			ui_settings_init();
+			if (ctx.settings_page != NULL) {
+				ui_settings_show(ctx.settings_page, false);
+			}
+		} else {
+			ui_settings_deinit();
+			ui_page_init(main_page());
+			ui_page_refresh(main_page());
+		}
+		lvgl_unlock();
+		return false;
+	}
+
+	if (is_settings_view_event(aeh)) {
+		const struct settings_view_event *event =
+			cast_settings_view_event(aeh);
+
+		ctx.settings_page = event->page;
+		if (ctx.settings_active && ctx.lvgl_initialized) {
+			lvgl_lock();
+			ui_settings_show(ctx.settings_page, event->animate);
+			lvgl_unlock();
+		}
+
+		return false;
+	}
+
 	if (is_datetime_event(aeh)) {
 		const struct datetime_event *event = cast_datetime_event(aeh);
 
@@ -257,6 +320,8 @@ APP_EVENT_SUBSCRIBE(MODULE, datetime_event);
 APP_EVENT_SUBSCRIBE(MODULE, hid_led_event);
 APP_EVENT_SUBSCRIBE(MODULE, module_state_event);
 APP_EVENT_SUBSCRIBE(MODULE, mode_switch_event);
+APP_EVENT_SUBSCRIBE(MODULE, settings_mode_event);
+APP_EVENT_SUBSCRIBE(MODULE, settings_view_event);
 APP_EVENT_SUBSCRIBE(MODULE, theme_rgb_update_event);
 APP_EVENT_SUBSCRIBE_EARLY(MODULE, power_down_event);
 APP_EVENT_SUBSCRIBE(MODULE, wake_up_event);

src/events/settings_mode_event.c

@@ -0,0 +1,29 @@
+#include "settings_mode_event.h"
+
+static void log_settings_mode_event(const struct app_event_header *aeh)
+{
+	const struct settings_mode_event *event =
+		cast_settings_mode_event(aeh);
+
+	APP_EVENT_MANAGER_LOG(aeh, "active:%u", event->active);
+}
+
+static void profile_settings_mode_event(struct log_event_buf *buf,
+					const struct app_event_header *aeh)
+{
+	const struct settings_mode_event *event =
+		cast_settings_mode_event(aeh);
+
+	nrf_profiler_log_encode_uint8(buf, event->active ? 1U : 0U);
+}
+
+APP_EVENT_INFO_DEFINE(settings_mode_event,
+		      ENCODE(NRF_PROFILER_ARG_U8),
+		      ENCODE("active"),
+		      profile_settings_mode_event);
+
+APP_EVENT_TYPE_DEFINE(settings_mode_event,
+		      log_settings_mode_event,
+		      &settings_mode_event_info,
+		      APP_EVENT_FLAGS_CREATE(
+			      APP_EVENT_TYPE_FLAGS_INIT_LOG_ENABLE));

src/events/settings_view_event.c

@@ -0,0 +1,33 @@
+#include <stdint.h>
+
+#include "settings_view_event.h"
+
+static void log_settings_view_event(const struct app_event_header *aeh)
+{
+	const struct settings_view_event *event =
+		cast_settings_view_event(aeh);
+
+	APP_EVENT_MANAGER_LOG(aeh, "page:%p animate:%u",
+			      event->page, event->animate);
+}
+
+static void profile_settings_view_event(struct log_event_buf *buf,
+					const struct app_event_header *aeh)
+{
+	const struct settings_view_event *event =
+		cast_settings_view_event(aeh);
+
+	nrf_profiler_log_encode_uint32(buf, (uint32_t)(uintptr_t)event->page);
+	nrf_profiler_log_encode_uint8(buf, event->animate ? 1U : 0U);
+}
+
+APP_EVENT_INFO_DEFINE(settings_view_event,
+		      ENCODE(NRF_PROFILER_ARG_U32, NRF_PROFILER_ARG_U8),
+		      ENCODE("page", "animate"),
+		      profile_settings_view_event);
+
+APP_EVENT_TYPE_DEFINE(settings_view_event,
+		      log_settings_view_event,
+		      &settings_view_event_info,
+		      APP_EVENT_FLAGS_CREATE(
+			      APP_EVENT_TYPE_FLAGS_INIT_LOG_ENABLE));

src/keyboard_core_module.c

@@ -20,6 +20,7 @@
 #include "keyboard_core.h"
 #include "keyboard_hid_report_event.h"
 #include "module_lifecycle.h"
+#include "settings_mode_event.h"
 #include "set_protocol_event.h"
 #include "transport_policy_event.h"
 
@@ -94,6 +95,7 @@ struct keyboard_core_module_ctx {
 	enum keyboard_protocol_mode transport_protocol_modes[HID_TRANSPORT_COUNT];
 	enum hid_transport_policy current_transport;
 	bool mode_valid;
+	bool settings_active;
 };
 
 static int do_init(void);
@@ -130,6 +132,7 @@ static struct keyboard_core_module_ctx ctx = {
 #define transport_protocol_modes ctx.transport_protocol_modes
 #define current_transport ctx.current_transport
 #define mode_valid ctx.mode_valid
+#define settings_active ctx.settings_active
 #define running module_lifecycle_is_running(&ctx.lc)
 
 static bool policy_to_transport(enum hid_transport_policy policy,
@@ -364,6 +367,7 @@ static void submit_consumer_fifo_frame(uint16_t usage_id)
 	enum mode_switch_mode mode;
 
 	if (!running || !mode_valid ||
+	    settings_active ||
 	    !transport_policy_to_mode(current_transport, &mode) ||
 	    (protocol_mode == KEYBOARD_PROTOCOL_MODE_BOOT)) {
 		return;
@@ -414,6 +418,10 @@ static void emit_keys_report(bool force)
 		return;
 	}
 
+	if (settings_active) {
+		return;
+	}
+
 	if (protocol_mode == KEYBOARD_PROTOCOL_MODE_BOOT) {
 		build_boot_report(report_buf);
 		report_size = KEYBOARD_BOOT_REPORT_SIZE;
@@ -445,6 +453,7 @@ static void emit_consumer_report(bool force)
 	enum mode_switch_mode mode;
 
 	if (!mode_valid || !transport_policy_to_mode(current_transport, &mode) ||
+	    settings_active ||
 	    (protocol_mode == KEYBOARD_PROTOCOL_MODE_BOOT)) {
 		return;
 	}
@@ -518,6 +527,7 @@ static int do_init(void)
 	reports_cache_invalidate();
 	function_usage_mask_clear();
 	mode_valid = false;
+	settings_active = false;
 	transport_protocol_modes[HID_TRANSPORT_USB] =
 		KEYBOARD_PROTOCOL_MODE_REPORT;
 	transport_protocol_modes[HID_TRANSPORT_BLE] =
@@ -562,6 +572,10 @@ static bool handle_button_event(const struct button_event *event)
 		return false;
 	}
 
+	if (settings_active) {
+		return false;
+	}
+
 	entry = keymap_get(event->key_id);
 	if (!entry) {
 		LOG_WRN("Unmapped key id 0x%04x", event->key_id);
@@ -639,6 +653,10 @@ static bool handle_encoder_event(const struct encoder_event *event)
 		return false;
 	}
 
+	if (settings_active) {
+		return false;
+	}
+
 	if (event->detents > 0) {
 		submit_consumer_pulse_frames(KEYBOARD_CONSUMER_CTRL_VOLUME_UP,
 					     (uint8_t)event->detents);
@@ -703,6 +721,27 @@ static bool app_event_handler(const struct app_event_header *aeh)
 			cast_transport_policy_event(aeh));
 	}
 
+	if (is_settings_mode_event(aeh)) {
+		const struct settings_mode_event *event =
+			cast_settings_mode_event(aeh);
+
+		if (settings_active == event->active) {
+			return false;
+		}
+
+		settings_active = event->active;
+		if (settings_active) {
+			if (mode_valid) {
+				emit_release_reports(current_transport);
+			}
+			emit_function_state_event();
+			keyboard_state_clear();
+			reports_cache_invalidate();
+		}
+
+		return false;
+	}
+
 	if (is_module_state_event(aeh)) {
 		const struct module_state_event *event = cast_module_state_event(aeh);
 
@@ -738,6 +777,7 @@ APP_EVENT_SUBSCRIBE(MODULE, button_event);
 APP_EVENT_SUBSCRIBE(MODULE, encoder_event);
 APP_EVENT_SUBSCRIBE(MODULE, function_bitmap_update_event);
 APP_EVENT_SUBSCRIBE(MODULE, set_protocol_event);
+APP_EVENT_SUBSCRIBE(MODULE, settings_mode_event);
 APP_EVENT_SUBSCRIBE(MODULE, transport_policy_event);
 APP_EVENT_SUBSCRIBE(MODULE, module_state_event);
 APP_EVENT_SUBSCRIBE_EARLY(MODULE, power_down_event);

src/settings_module.c

@@ -0,0 +1,210 @@
+#include <stdbool.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <app_event_manager.h>
+
+#define MODULE settings_module
+#include <caf/events/click_event.h>
+#include <caf/events/module_state_event.h>
+#include <caf/events/power_event.h>
+
+#include <zephyr/logging/log.h>
+
+#include "encoder_event.h"
+#include "module_lifecycle.h"
+#include "settings_mode_event.h"
+#include "theme_color.h"
+#include "theme_rgb_update_event.h"
+#include "ui/ui_settings_controller.h"
+
+LOG_MODULE_REGISTER(MODULE, LOG_LEVEL_INF);
+
+#define SETTINGS_MUTE_KEY_ID 0x180U
+
+struct settings_module_ctx {
+	struct module_lifecycle_ctx lc;
+	bool active;
+	struct theme_rgb current_theme;
+};
+
+static int do_init(void);
+static int do_start(void);
+static int do_stop(void);
+
+static const struct module_lifecycle_cfg lifecycle_cfg = {
+	.mode = ML_MODE_POWER,
+	.stopped_state = MODULE_STATE_STANDBY,
+};
+
+static const struct module_lifecycle_ops lifecycle_ops = {
+	.do_init = do_init,
+	.do_start = do_start,
+	.do_stop = do_stop,
+};
+
+static struct settings_module_ctx ctx = {
+	.lc = {
+		.state = LC_UNINIT,
+		.cfg = &lifecycle_cfg,
+		.ops = &lifecycle_ops,
+	},
+};
+
+static void settings_exit(void)
+{
+	if (!ctx.active) {
+		return;
+	}
+
+	ctx.active = false;
+	ui_settings_controller_close();
+	submit_settings_mode_event(false);
+}
+
+static void settings_enter(void)
+{
+	if (ctx.active) {
+		return;
+	}
+
+	ctx.active = true;
+	submit_settings_mode_event(true);
+	ui_settings_controller_open();
+}
+
+static int do_init(void)
+{
+	ctx.active = false;
+	ctx.current_theme = (struct theme_rgb) {
+		.r = BLINKY_THEME_DEFAULT_R,
+		.g = BLINKY_THEME_DEFAULT_G,
+		.b = BLINKY_THEME_DEFAULT_B,
+	};
+	ui_settings_theme_set_current(ctx.current_theme);
+
+	return 0;
+}
+
+static int do_start(void)
+{
+	return 0;
+}
+
+static int do_stop(void)
+{
+	settings_exit();
+	return 0;
+}
+
+static bool handle_click_event(const struct click_event *event)
+{
+	if (!module_lifecycle_is_running(&ctx.lc) ||
+	    (event->key_id != SETTINGS_MUTE_KEY_ID)) {
+		return false;
+	}
+
+	if (!ctx.active) {
+		if (event->click == CLICK_LONG) {
+			settings_enter();
+		}
+
+		return false;
+	}
+
+	switch (event->click) {
+	case CLICK_SHORT:
+		ui_settings_controller_select();
+		break;
+
+	case CLICK_LONG:
+		{
+			bool active = ui_settings_controller_back();
+
+			if (!active) {
+				settings_exit();
+			}
+		}
+		break;
+
+	default:
+		break;
+	}
+
+	return false;
+}
+
+static bool handle_encoder_event(const struct encoder_event *event)
+{
+	if (!module_lifecycle_is_running(&ctx.lc) || !ctx.active) {
+		return false;
+	}
+
+	ui_settings_controller_move(event->detents);
+	return false;
+}
+
+static bool handle_theme_rgb_update_event(
+	const struct theme_rgb_update_event *event)
+{
+	ctx.current_theme = event->theme;
+	ui_settings_theme_set_current(event->theme);
+
+	if (ctx.active) {
+		ui_settings_controller_refresh(false);
+	}
+
+	return false;
+}
+
+static bool app_event_handler(const struct app_event_header *aeh)
+{
+	if (is_click_event(aeh)) {
+		return handle_click_event(cast_click_event(aeh));
+	}
+
+	if (is_encoder_event(aeh)) {
+		return handle_encoder_event(cast_encoder_event(aeh));
+	}
+
+	if (is_theme_rgb_update_event(aeh)) {
+		return handle_theme_rgb_update_event(
+			cast_theme_rgb_update_event(aeh));
+	}
+
+	if (is_module_state_event(aeh)) {
+		const struct module_state_event *event = cast_module_state_event(aeh);
+
+		if (check_state(event, MODULE_ID(main), MODULE_STATE_READY)) {
+			(void)module_set_lifecycle(&ctx.lc, LC_RUNNING);
+		}
+
+		return false;
+	}
+
+	if (is_power_down_event(aeh)) {
+		if (module_lifecycle_is_initialized(&ctx.lc)) {
+			(void)module_set_lifecycle(&ctx.lc, LC_STOPPED);
+		}
+
+		return false;
+	}
+
+	if (is_wake_up_event(aeh)) {
+		if (module_lifecycle_is_initialized(&ctx.lc)) {
+			(void)module_set_lifecycle(&ctx.lc, LC_RUNNING);
+		}
+
+		return false;
+	}
+
+	return false;
+}
+
+APP_EVENT_LISTENER(MODULE, app_event_handler);
+APP_EVENT_SUBSCRIBE(MODULE, click_event);
+APP_EVENT_SUBSCRIBE(MODULE, encoder_event);
+APP_EVENT_SUBSCRIBE(MODULE, module_state_event);
+APP_EVENT_SUBSCRIBE(MODULE, theme_rgb_update_event);
+APP_EVENT_SUBSCRIBE_EARLY(MODULE, power_down_event);
+APP_EVENT_SUBSCRIBE(MODULE, wake_up_event);

src/ui/ui_main.c

@@ -19,6 +19,7 @@ enum {
 };
 
 struct ui_main_ctx {
+	lv_obj_t *content;
 	lv_obj_t *status_badges[UI_STATUS_COUNT];
 	lv_obj_t *status_labels[UI_STATUS_COUNT];
 	lv_obj_t *battery_icon;
@@ -30,6 +31,9 @@ struct ui_main_ctx {
 
 static struct ui_main_ctx g_ui;
 static bool ui_initialized;
+static const struct ui_main_model *page_model;
+static const char *page_date_text;
+static const char *page_time_text;
 
 static const char *const status_texts[UI_STATUS_COUNT] = {
 	LV_SYMBOL_USB,
@@ -116,6 +120,10 @@ static void ui_main_create_status_chip(lv_obj_t *parent, enum ui_status_id id)
 
 void ui_main_refresh_status_bar(const struct ui_main_model *model)
 {
+	if (!ui_initialized) {
+		return;
+	}
+
 	for (uint32_t i = 0; i < UI_STATUS_COUNT; i++) {
 		lv_obj_t *badge = g_ui.status_badges[i];
 		lv_obj_t *label = g_ui.status_labels[i];
@@ -145,7 +153,8 @@ void ui_main_refresh_battery(const struct ui_main_model *model)
 	lv_color_t battery_color;
 	lv_color_t state_color = lv_color_white();
 
-	if ((g_ui.battery_icon == NULL) || (g_ui.battery_label == NULL) ||
+	if (!ui_initialized ||
+	    (g_ui.battery_icon == NULL) || (g_ui.battery_label == NULL) ||
 	    (g_ui.battery_state_label == NULL)) {
 		return;
 	}
@@ -171,7 +180,8 @@ void ui_main_refresh_battery(const struct ui_main_model *model)
 
 void ui_main_refresh_datetime(const char *date_text, const char *time_text)
 {
-	if ((g_ui.date_label == NULL) || (g_ui.time_label == NULL)) {
+	if (!ui_initialized ||
+	    (g_ui.date_label == NULL) || (g_ui.time_label == NULL)) {
 		return;
 	}
 
@@ -200,6 +210,7 @@ void ui_main_init(const struct ui_main_model *model,
 	lv_obj_t *bottom_row;
 
 	if (ui_initialized) {
+		ui_main_refresh_all(model, date_text, time_text);
 		return;
 	}
 
@@ -213,6 +224,7 @@ void ui_main_init(const struct ui_main_model *model,
 	lv_obj_set_scrollbar_mode(screen, LV_SCROLLBAR_MODE_OFF);
 
 	content = lv_obj_create(screen);
+	g_ui.content = content;
 	lv_obj_remove_style_all(content);
 	lv_obj_set_size(content, LV_PCT(100), LV_PCT(100));
 	lv_obj_set_style_bg_opa(content, LV_OPA_TRANSP, 0);
@@ -287,3 +299,56 @@ void ui_main_init(const struct ui_main_model *model,
 	ui_main_refresh_all(model, date_text, time_text);
 	ui_initialized = true;
 }
+
+void ui_main_deinit(void)
+{
+	if (!ui_initialized) {
+		return;
+	}
+
+	if (g_ui.content != NULL) {
+		lv_obj_delete(g_ui.content);
+	}
+
+	memset(&g_ui, 0, sizeof(g_ui));
+	ui_initialized = false;
+}
+
+static void main_page_init(struct ui_page *page)
+{
+	ARG_UNUSED(page);
+	ui_main_init(page_model, page_date_text, page_time_text);
+}
+
+static void main_page_deinit(struct ui_page *page)
+{
+	ARG_UNUSED(page);
+	ui_main_deinit();
+}
+
+static void main_page_refresh(struct ui_page *page)
+{
+	ARG_UNUSED(page);
+	ui_main_refresh_all(page_model, page_date_text, page_time_text);
+}
+
+static const struct ui_page_ops main_page_ops = {
+	.init = main_page_init,
+	.deinit = main_page_deinit,
+	.refresh = main_page_refresh,
+};
+
+static struct ui_page main_page = {
+	.ops = &main_page_ops,
+};
+
+struct ui_page *ui_main_page_get(const struct ui_main_model *model,
+				 const char *date_text,
+				 const char *time_text)
+{
+	page_model = model;
+	page_date_text = date_text;
+	page_time_text = time_text;
+
+	return &main_page;
+}

src/ui/ui_main.h

@@ -7,6 +7,7 @@
 #include <lvgl.h>
 
 #include "mode_switch_event.h"
+#include "ui/ui_page.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -31,6 +32,10 @@ void ui_main_refresh_all(const struct ui_main_model *model,
 void ui_main_refresh_status_bar(const struct ui_main_model *model);
 void ui_main_refresh_battery(const struct ui_main_model *model);
 void ui_main_refresh_datetime(const char *date_text, const char *time_text);
+void ui_main_deinit(void);
+struct ui_page *ui_main_page_get(const struct ui_main_model *model,
+				 const char *date_text,
+				 const char *time_text);
 
 #ifdef __cplusplus
 }

src/ui/ui_settings.c

@@ -0,0 +1,233 @@
+#include <string.h>
+
+#include <lvgl.h>
+
+#include "ui_settings.h"
+
+#define UI_SETTINGS_LIST_H 104
+#define UI_SETTINGS_MAX_ITEMS 8U
+
+struct ui_settings_row {
+	lv_obj_t *row;
+	lv_obj_t *icon;
+	lv_obj_t *title;
+	lv_obj_t *value;
+	lv_obj_t *custom;
+};
+
+struct ui_settings_ctx {
+	lv_obj_t *content;
+	lv_obj_t *title;
+	lv_obj_t *hint;
+	lv_obj_t *scroll;
+	lv_obj_t *value;
+	struct ui_settings_row rows[UI_SETTINGS_MAX_ITEMS];
+	lv_group_t *focus_group;
+	uint8_t row_count;
+	struct ui_settings_page *page;
+	bool initialized;
+};
+
+static struct ui_settings_ctx g_ui;
+
+static void row_clear_custom(struct ui_settings_row *row)
+{
+	lv_obj_clean(row->custom);
+	lv_obj_set_style_bg_opa(row->custom, LV_OPA_TRANSP, 0);
+	lv_obj_set_style_bg_color(row->custom, lv_color_hex(0x0B1017), 0);
+}
+
+static void create_row(struct ui_settings_row *row)
+{
+	row->row = lv_obj_create(g_ui.scroll);
+	lv_obj_remove_style_all(row->row);
+	lv_obj_set_width(row->row, LV_PCT(100));
+	lv_obj_set_height(row->row, 30);
+	lv_obj_set_style_bg_opa(row->row, LV_OPA_TRANSP, 0);
+	lv_obj_set_style_radius(row->row, 9, 0);
+	lv_obj_set_style_border_width(row->row, 2, 0);
+	lv_obj_set_style_border_color(row->row, lv_color_hex(0x0B1017), 0);
+	lv_obj_set_style_pad_hor(row->row, 6, 0);
+	lv_obj_set_layout(row->row, LV_LAYOUT_FLEX);
+	lv_obj_set_flex_flow(row->row, LV_FLEX_FLOW_ROW);
+	lv_obj_set_flex_align(row->row, LV_FLEX_ALIGN_START,
+			      LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
+	lv_obj_set_style_pad_column(row->row, 6, 0);
+	lv_obj_add_flag(row->row, LV_OBJ_FLAG_SCROLL_ON_FOCUS);
+	lv_group_add_obj(g_ui.focus_group, row->row);
+
+	row->icon = lv_label_create(row->row);
+	lv_obj_set_width(row->icon, 20);
+	lv_obj_set_style_text_font(row->icon, &lv_font_montserrat_14, 0);
+	lv_obj_set_style_text_color(row->icon, lv_color_hex(0x8A95A5), 0);
+
+	row->title = lv_label_create(row->row);
+	lv_obj_set_width(row->title, 118);
+	lv_obj_set_style_text_font(row->title, &lv_font_montserrat_14, 0);
+	lv_obj_set_style_text_color(row->title, lv_color_hex(0xD8DEE9), 0);
+	lv_label_set_long_mode(row->title, LV_LABEL_LONG_CLIP);
+
+	row->value = lv_label_create(row->row);
+	lv_obj_set_flex_grow(row->value, 1);
+	lv_obj_set_style_text_font(row->value, &lv_font_montserrat_14, 0);
+	lv_obj_set_style_text_color(row->value, lv_color_hex(0x97A3B5), 0);
+	lv_obj_set_style_text_align(row->value, LV_TEXT_ALIGN_RIGHT, 0);
+	lv_label_set_long_mode(row->value, LV_LABEL_LONG_CLIP);
+
+	row->custom = lv_obj_create(row->row);
+	lv_obj_remove_style_all(row->custom);
+	lv_obj_set_size(row->custom, 16, 16);
+	row_clear_custom(row);
+}
+
+static void rebuild_rows(uint8_t count)
+{
+	if (count > UI_SETTINGS_MAX_ITEMS) {
+		count = UI_SETTINGS_MAX_ITEMS;
+	}
+
+	if (g_ui.row_count == count) {
+		return;
+	}
+
+	lv_obj_clean(g_ui.scroll);
+	memset(g_ui.rows, 0, sizeof(g_ui.rows));
+	g_ui.row_count = count;
+	lv_group_delete(g_ui.focus_group);
+	g_ui.focus_group = lv_group_create();
+
+	for (uint8_t i = 0; i < g_ui.row_count; i++) {
+		create_row(&g_ui.rows[i]);
+	}
+}
+
+static void row_set(struct ui_settings_row *row,
+		    const struct ui_settings_item *item,
+		    bool selected,
+		    lv_color_t accent)
+{
+	lv_label_set_text(row->icon, item->icon ? item->icon : "");
+	lv_label_set_text(row->title, item->title ? item->title : "");
+	lv_label_set_text(row->value, item->value ? item->value : "");
+	lv_obj_set_style_border_color(row->row,
+				      selected ? accent : lv_color_hex(0x0B1017),
+				      0);
+
+	row_clear_custom(row);
+	if (item->draw != NULL) {
+		item->draw(item, row->custom);
+	}
+}
+
+static void focus_row(uint8_t index, bool animate)
+{
+	if (index >= g_ui.row_count) {
+		return;
+	}
+
+	lv_obj_update_layout(g_ui.scroll);
+	lv_group_focus_obj(g_ui.rows[index].row);
+	lv_obj_scroll_to_view(g_ui.rows[index].row,
+			      animate ? LV_ANIM_ON : LV_ANIM_OFF);
+}
+
+void ui_settings_init(void)
+{
+	lv_obj_t *screen = lv_screen_active();
+
+	if (g_ui.initialized) {
+		return;
+	}
+
+	memset(&g_ui, 0, sizeof(g_ui));
+	g_ui.focus_group = lv_group_create();
+
+	g_ui.content = lv_obj_create(screen);
+	lv_obj_remove_style_all(g_ui.content);
+	lv_obj_set_size(g_ui.content, LV_PCT(100), LV_PCT(100));
+	lv_obj_set_style_bg_color(g_ui.content, lv_color_hex(0x0B1017), 0);
+	lv_obj_set_style_bg_opa(g_ui.content, LV_OPA_COVER, 0);
+	lv_obj_set_style_pad_left(g_ui.content, 14, 0);
+	lv_obj_set_style_pad_right(g_ui.content, 14, 0);
+	lv_obj_set_style_pad_top(g_ui.content, 8, 0);
+	lv_obj_set_style_pad_bottom(g_ui.content, 8, 0);
+	lv_obj_set_layout(g_ui.content, LV_LAYOUT_FLEX);
+	lv_obj_set_flex_flow(g_ui.content, LV_FLEX_FLOW_COLUMN);
+	lv_obj_set_flex_align(g_ui.content, LV_FLEX_ALIGN_START,
+			      LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_START);
+	lv_obj_set_style_pad_row(g_ui.content, 6, 0);
+
+	g_ui.title = lv_label_create(g_ui.content);
+	lv_obj_set_style_text_font(g_ui.title, &lv_font_montserrat_32, 0);
+	lv_obj_set_style_text_color(g_ui.title, lv_color_white(), 0);
+
+	g_ui.hint = lv_label_create(g_ui.content);
+	lv_obj_set_style_text_font(g_ui.hint, &lv_font_montserrat_14, 0);
+	lv_obj_set_style_text_color(g_ui.hint, lv_color_hex(0x97A3B5), 0);
+
+	g_ui.scroll = lv_obj_create(g_ui.content);
+	lv_obj_remove_style_all(g_ui.scroll);
+	lv_obj_set_width(g_ui.scroll, LV_PCT(100));
+	lv_obj_set_height(g_ui.scroll, UI_SETTINGS_LIST_H);
+	lv_obj_set_style_bg_opa(g_ui.scroll, LV_OPA_TRANSP, 0);
+	lv_obj_set_layout(g_ui.scroll, LV_LAYOUT_FLEX);
+	lv_obj_set_flex_flow(g_ui.scroll, LV_FLEX_FLOW_COLUMN);
+	lv_obj_set_flex_align(g_ui.scroll, LV_FLEX_ALIGN_START,
+			      LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_START);
+	lv_obj_set_style_pad_row(g_ui.scroll, 6, 0);
+	lv_obj_set_scroll_dir(g_ui.scroll, LV_DIR_VER);
+	lv_obj_set_scrollbar_mode(g_ui.scroll, LV_SCROLLBAR_MODE_OFF);
+
+	g_ui.value = lv_label_create(g_ui.content);
+	lv_obj_set_width(g_ui.value, LV_PCT(100));
+	lv_obj_set_style_text_font(g_ui.value, &lv_font_montserrat_14, 0);
+	lv_obj_set_style_text_color(g_ui.value, lv_color_hex(0x97A3B5), 0);
+
+	g_ui.initialized = true;
+}
+
+void ui_settings_show(struct ui_settings_page *page, bool animate)
+{
+	uint8_t count;
+	lv_color_t accent = lv_color_hex(0x4C9EF5);
+
+	if ((page == NULL) || !g_ui.initialized ||
+	    (page->ops == NULL) || (page->ops->get_count == NULL) ||
+	    (page->ops->get_item == NULL)) {
+		return;
+	}
+
+	count = page->ops->get_count(page);
+	rebuild_rows(count);
+	g_ui.page = page;
+
+	lv_label_set_text(g_ui.title, page->title ? page->title : "");
+	lv_label_set_text(g_ui.hint, page->hint ? page->hint : "");
+	lv_label_set_text(g_ui.value, "");
+
+	for (uint8_t i = 0; i < g_ui.row_count; i++) {
+		struct ui_settings_item item = { 0 };
+
+		page->ops->get_item(page, i, &item);
+		row_set(&g_ui.rows[i], &item, page->selected == i, accent);
+	}
+
+	focus_row(page->selected, animate);
+}
+
+void ui_settings_deinit(void)
+{
+	if (!g_ui.initialized) {
+		return;
+	}
+
+	if (g_ui.focus_group != NULL) {
+		lv_group_delete(g_ui.focus_group);
+	}
+
+	if (g_ui.content != NULL) {
+		lv_obj_delete(g_ui.content);
+	}
+
+	memset(&g_ui, 0, sizeof(g_ui));
+}

src/ui/ui_settings.h

@@ -0,0 +1,18 @@
+#ifndef BLINKY_UI_SETTINGS_H_
+#define BLINKY_UI_SETTINGS_H_
+
+#include "ui/ui_settings_page.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+void ui_settings_init(void);
+void ui_settings_show(struct ui_settings_page *page, bool animate);
+void ui_settings_deinit(void);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* BLINKY_UI_SETTINGS_H_ */

src/ui/ui_settings_ble.c

@@ -0,0 +1,60 @@
+#include <lvgl.h>
+
+#include <zephyr/sys/util.h>
+
+#include "ui/ui_settings_controller.h"
+
+static uint8_t ble_get_count(struct ui_settings_page *page)
+{
+	ARG_UNUSED(page);
+	return 4U;
+}
+
+static void ble_get_item(struct ui_settings_page *page, uint8_t index,
+			 struct ui_settings_item *item)
+{
+	ARG_UNUSED(page);
+
+	if (index < 3U) {
+		static const char *const titles[] = {
+			"Slot 1",
+			"Slot 2",
+			"Slot 3",
+		};
+
+		item->icon = LV_SYMBOL_BLUETOOTH;
+		item->title = titles[index];
+		item->value = ui_settings_ble_slot_label(index);
+		return;
+	}
+
+	item->icon = LV_SYMBOL_TRASH;
+	item->title = "Erase Bond";
+	item->value = ui_settings_ble_current_label();
+}
+
+static void ble_on_select(struct ui_settings_page *page, uint8_t index)
+{
+	if (index < 3U) {
+		ui_settings_ble_select_slot(index);
+	} else {
+		ui_settings_ble_erase_current();
+	}
+
+	(void)ui_settings_controller_back();
+}
+
+static const struct ui_settings_page_ops ble_ops = {
+	.get_count = ble_get_count,
+	.get_item = ble_get_item,
+	.on_select = ble_on_select,
+};
+
+struct ui_settings_page ui_settings_ble_page = {
+	.base = {
+		.ops = &ble_ops.base,
+	},
+	.ops = &ble_ops,
+	.title = LV_SYMBOL_BLUETOOTH " Bluetooth",
+	.hint = "Short: select and return",
+};

src/ui/ui_settings_controller.c

@@ -0,0 +1,205 @@
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+#include <zephyr/sys/util.h>
+
+#include "ui/ui_settings_controller.h"
+#include "settings_view_event.h"
+#include "ui_settings_pages.h"
+
+#define BLE_SLOT_COUNT 3U
+
+struct controller_ctx {
+	struct ui_settings_page *current;
+	bool active;
+	uint8_t active_ble_slot;
+	char ble_labels[BLE_SLOT_COUNT][16];
+	struct theme_rgb theme;
+};
+
+static struct controller_ctx ctx = {
+	.active_ble_slot = 0U,
+	.ble_labels = {
+		"Host A",
+		"Host B",
+		"Empty",
+	},
+	.theme = {
+		.r = BLINKY_THEME_DEFAULT_R,
+		.g = BLINKY_THEME_DEFAULT_G,
+		.b = BLINKY_THEME_DEFAULT_B,
+	},
+};
+
+static uint8_t wrap_index(uint8_t current, uint8_t count, int8_t delta)
+{
+	int32_t next = current;
+
+	if (count == 0U) {
+		return 0U;
+	}
+
+	next += delta;
+	while (next < 0) {
+		next += count;
+	}
+
+	return (uint8_t)(next % count);
+}
+
+static void publish_view(bool animate)
+{
+	if (ctx.active && (ctx.current != NULL)) {
+		submit_settings_view_event(ctx.current, animate);
+	}
+}
+
+void ui_settings_controller_switch_to(struct ui_settings_page *page,
+				      struct ui_page *parent)
+{
+	if (page == NULL) {
+		return;
+	}
+
+	if (ctx.current != NULL) {
+		ui_page_deinit(&ctx.current->base);
+	}
+
+	page->base.parent = parent;
+	ctx.current = page;
+	ui_page_init(&page->base);
+	if ((page->ops != NULL) && (page->ops->on_enter != NULL)) {
+		page->ops->on_enter(page);
+	}
+}
+
+void ui_settings_controller_open(void)
+{
+	ctx.active = true;
+	ui_settings_controller_switch_to(&ui_settings_root_page, NULL);
+	publish_view(false);
+}
+
+void ui_settings_controller_close(void)
+{
+	if (ctx.current != NULL) {
+		ui_page_deinit(&ctx.current->base);
+		ctx.current = NULL;
+	}
+
+	ctx.active = false;
+}
+
+bool ui_settings_controller_back(void)
+{
+	struct ui_page *parent;
+
+	if (ctx.current == NULL) {
+		return false;
+	}
+
+	if ((ctx.current->ops != NULL) && (ctx.current->ops->on_back != NULL)) {
+		ctx.current->ops->on_back(ctx.current);
+		publish_view(true);
+		return ctx.active;
+	}
+
+	parent = ctx.current->base.parent;
+	if (parent == NULL) {
+		ui_settings_controller_close();
+		return false;
+	}
+
+	ui_settings_controller_switch_to(ui_page_to_settings(parent),
+					 parent->parent);
+	publish_view(true);
+	return true;
+}
+
+void ui_settings_controller_select(void)
+{
+	if ((ctx.current == NULL) || (ctx.current->ops == NULL) ||
+	    (ctx.current->ops->on_select == NULL)) {
+		return;
+	}
+
+	ctx.current->ops->on_select(ctx.current, ctx.current->selected);
+	publish_view(true);
+}
+
+void ui_settings_controller_move(int8_t delta)
+{
+	uint8_t count;
+
+	if ((ctx.current == NULL) || (ctx.current->ops == NULL) ||
+	    (ctx.current->ops->get_count == NULL)) {
+		return;
+	}
+
+	count = ctx.current->ops->get_count(ctx.current);
+	ctx.current->selected = wrap_index(ctx.current->selected, count, delta);
+	publish_view(true);
+}
+
+void ui_settings_controller_refresh(bool animate)
+{
+	if (ctx.current != NULL) {
+		publish_view(animate);
+	}
+}
+
+bool ui_settings_controller_is_active(void)
+{
+	return ctx.active;
+}
+
+const char *ui_settings_ble_current_label(void)
+{
+	return (ctx.active_ble_slot == 0U) ? "Slot 1" :
+	       (ctx.active_ble_slot == 1U) ? "Slot 2" : "Slot 3";
+}
+
+void ui_settings_ble_select_slot(uint8_t slot)
+{
+	if (slot < BLE_SLOT_COUNT) {
+		ctx.active_ble_slot = slot;
+	}
+}
+
+void ui_settings_ble_erase_current(void)
+{
+	strncpy(ctx.ble_labels[ctx.active_ble_slot], "Empty",
+		sizeof(ctx.ble_labels[ctx.active_ble_slot]));
+	ctx.ble_labels[ctx.active_ble_slot]
+		      [sizeof(ctx.ble_labels[ctx.active_ble_slot]) - 1U] = '\0';
+}
+
+const char *ui_settings_ble_slot_label(uint8_t slot)
+{
+	if (slot >= BLE_SLOT_COUNT) {
+		return "";
+	}
+
+	return ctx.ble_labels[slot];
+}
+
+void ui_settings_theme_set_current(struct theme_rgb theme)
+{
+	ctx.theme = theme;
+}
+
+const char *ui_settings_theme_current_name(void)
+{
+	extern const char *ui_settings_theme_name_for_color(struct theme_rgb theme);
+
+	return ui_settings_theme_name_for_color(ctx.theme);
+}
+
+uint8_t ui_settings_theme_current_index(void)
+{
+	extern uint8_t ui_settings_theme_index_for_color(struct theme_rgb theme);
+
+	return ui_settings_theme_index_for_color(ctx.theme);
+}

src/ui/ui_settings_pages.h

@@ -0,0 +1,10 @@
+#ifndef BLINKY_UI_SETTINGS_PAGES_H_
+#define BLINKY_UI_SETTINGS_PAGES_H_
+
+#include "ui/ui_settings_page.h"
+
+extern struct ui_settings_page ui_settings_root_page;
+extern struct ui_settings_page ui_settings_ble_page;
+extern struct ui_settings_page ui_settings_theme_page;
+
+#endif /* BLINKY_UI_SETTINGS_PAGES_H_ */

src/ui/ui_settings_root.c

@@ -0,0 +1,64 @@
+#include <lvgl.h>
+
+#include <zephyr/sys/util.h>
+
+#include "ui/ui_settings_controller.h"
+#include "ui_settings_pages.h"
+
+static uint8_t root_get_count(struct ui_settings_page *page)
+{
+	ARG_UNUSED(page);
+	return 2U;
+}
+
+static void root_get_item(struct ui_settings_page *page, uint8_t index,
+			  struct ui_settings_item *item)
+{
+	ARG_UNUSED(page);
+
+	if (index == 0U) {
+		item->icon = LV_SYMBOL_BLUETOOTH;
+		item->title = "Bluetooth";
+		item->value = ui_settings_ble_current_label();
+		return;
+	}
+
+	item->icon = LV_SYMBOL_TINT;
+	item->title = "Theme";
+	item->value = ui_settings_theme_current_name();
+}
+
+static void root_on_enter(struct ui_settings_page *page)
+{
+	page->selected = 0U;
+}
+
+static void root_on_select(struct ui_settings_page *page, uint8_t index)
+{
+	ui_settings_controller_switch_to(
+		(index == 0U) ? &ui_settings_ble_page : &ui_settings_theme_page,
+		&page->base);
+}
+
+static void root_on_back(struct ui_settings_page *page)
+{
+	ARG_UNUSED(page);
+	ui_settings_controller_close();
+}
+
+static const struct ui_settings_page_ops root_ops = {
+	.get_count = root_get_count,
+	.get_item = root_get_item,
+	.on_enter = root_on_enter,
+	.on_select = root_on_select,
+	.on_back = root_on_back,
+};
+
+struct ui_settings_page ui_settings_root_page = {
+	.base = {
+		.ops = &root_ops.base,
+	},
+	.ops = &root_ops,
+	.title = LV_SYMBOL_SETTINGS " Settings",
+	.hint = "Rotate select  Tap OK  Hold exit",
+};

src/ui/ui_settings_theme.c

@@ -0,0 +1,109 @@
+#include <lvgl.h>
+
+#include <zephyr/sys/util.h>
+
+#include "theme_rgb_update_event.h"
+#include "ui/ui_settings_controller.h"
+
+struct theme_option {
+	const char *name;
+	struct theme_rgb color;
+};
+
+static const struct theme_option themes[] = {
+	{ "Red", { .r = 0xFF, .g = 0x00, .b = 0x00 } },
+	{ "Amber", { .r = 0xFF, .g = 0x95, .b = 0x00 } },
+	{ "Default", { .r = BLINKY_THEME_DEFAULT_R,
+		       .g = BLINKY_THEME_DEFAULT_G,
+		       .b = BLINKY_THEME_DEFAULT_B } },
+	{ "Green", { .r = 0x34, .g = 0xC7, .b = 0x59 } },
+	{ "Purple", { .r = 0xBF, .g = 0x5A, .b = 0xF2 } },
+	{ "White", { .r = 0xF2, .g = 0xF2, .b = 0xF7 } },
+};
+
+static bool theme_equal(struct theme_rgb lhs, struct theme_rgb rhs)
+{
+	return (lhs.r == rhs.r) && (lhs.g == rhs.g) && (lhs.b == rhs.b);
+}
+
+uint8_t ui_settings_theme_index_for_color(struct theme_rgb theme)
+{
+	for (uint8_t i = 0; i < ARRAY_SIZE(themes); i++) {
+		if (theme_equal(theme, themes[i].color)) {
+			return i;
+		}
+	}
+
+	return 0U;
+}
+
+const char *ui_settings_theme_name_for_color(struct theme_rgb theme)
+{
+	for (uint8_t i = 0; i < ARRAY_SIZE(themes); i++) {
+		if (theme_equal(theme, themes[i].color)) {
+			return themes[i].name;
+		}
+	}
+
+	return "Custom";
+}
+
+static void draw_swatch(const struct ui_settings_item *item, lv_obj_t *container)
+{
+	const struct theme_rgb *color = item->user_data;
+
+	if (color == NULL) {
+		return;
+	}
+
+	lv_obj_set_style_bg_opa(container, LV_OPA_COVER, 0);
+	lv_obj_set_style_bg_color(container,
+				  lv_color_make(color->r, color->g, color->b), 0);
+}
+
+static uint8_t theme_get_count(struct ui_settings_page *page)
+{
+	ARG_UNUSED(page);
+	return ARRAY_SIZE(themes);
+}
+
+static void theme_get_item(struct ui_settings_page *page, uint8_t index,
+			   struct ui_settings_item *item)
+{
+	ARG_UNUSED(page);
+
+	item->icon = LV_SYMBOL_TINT;
+	item->title = themes[index].name;
+	item->draw = draw_swatch;
+	item->user_data = (void *)&themes[index].color;
+}
+
+static void theme_on_enter(struct ui_settings_page *page)
+{
+	page->selected = ui_settings_theme_current_index();
+}
+
+static void theme_on_select(struct ui_settings_page *page, uint8_t index)
+{
+	struct theme_rgb theme = themes[index].color;
+
+	ui_settings_theme_set_current(theme);
+	submit_theme_rgb_update_event(theme);
+	(void)ui_settings_controller_back();
+}
+
+static const struct ui_settings_page_ops theme_ops = {
+	.get_count = theme_get_count,
+	.get_item = theme_get_item,
+	.on_enter = theme_on_enter,
+	.on_select = theme_on_select,
+};
+
+struct ui_settings_page ui_settings_theme_page = {
+	.base = {
+		.ops = &theme_ops.base,
+	},
+	.ops = &theme_ops,
+	.title = LV_SYMBOL_TINT " Theme",
+	.hint = "Short: apply and return",
+};