Gridnav and fixes

Buildscripts/sdkconfig-default.properties

@@ -37,6 +37,8 @@ CONFIG_LV_FS_STDIO_LETTER=65
 CONFIG_LV_FS_STDIO_PATH=""
 CONFIG_LV_FS_STDIO_CACHE_SIZE=4096
 CONFIG_LV_USE_LODEPNG=n
+# 2D keyboard navigation in grids (lvgl_grid_navigation_add())
+CONFIG_LV_USE_GRIDNAV=y
 CONFIG_LV_USE_BUILTIN_MALLOC=n
 # Routes lv_malloc/realloc/free through Modules/lvgl-module/source/lv_mem_custom.c, which prefers
 # PSRAM (falls back to internal RAM automatically) instead of a fixed-size pool or plain malloc.

Devices/lilygo-t5-epd47-s3/device.properties

@@ -22,5 +22,3 @@ lvgl.colorDepth=8
 lvgl.fontSize=24
 lvgl.theme=Mono
 lvgl.statusbarColorsInverted=true
-
-sdkconfig.CONFIG_LV_THEME_DEFAULT_TRANSITION_TIME=0

Devices/lilygo-tdeck-max/device.properties

@@ -23,11 +23,7 @@ display.shape=rectangle
 display.dpi=128
 
 lvgl.colorDepth=8
-# Monochrome theme: the default colour theme renders accent-coloured UI that
-# thresholds to invisible on a 1bpp panel (enables CONFIG_LV_USE_THEME_MONO).
 lvgl.theme=Mono
 lvgl.statusbarColorsInverted=true
 
 cdn.warningMessage=Display not reliably working. Use at your own risk.
-
-sdkconfig.CONFIG_LV_THEME_DEFAULT_TRANSITION_TIME=0

Devices/lilygo-tdeck-pro/device.properties

@@ -22,11 +22,7 @@ display.shape=rectangle
 display.dpi=128
 
 lvgl.colorDepth=8
-# Monochrome theme: the default colour theme renders accent-coloured UI that
-# thresholds to invisible on a 1bpp panel (enables CONFIG_LV_USE_THEME_MONO).
 lvgl.theme=Mono
 lvgl.statusbarColorsInverted=true
 
 cdn.warningMessage=Only for hardware revision 1.0! Display not reliably working. Use at your own risk.
-
-sdkconfig.CONFIG_LV_THEME_DEFAULT_TRANSITION_TIME=0

Devices/m5stack-papers3/device.properties

@@ -25,4 +25,3 @@ lvgl.theme=Mono
 lvgl.statusbarColorsInverted=true
 
 sdkconfig.CONFIG_EPD_DISPLAY_TYPE_ED047TC2=y
-sdkconfig.CONFIG_LV_THEME_DEFAULT_TRANSITION_TIME=0

Drivers/button-control-module/source/button_control.cpp

@@ -103,7 +103,7 @@ static error_t start(Device* device) {
 
     error_t error = acquire_button(
         config->pin_primary,
-        two_button_mode ? (uint32_t)CODEPOINT_ENTER : (uint32_t)CODEPOINT_ARROW_DOWN,
+        two_button_mode ? (uint32_t)CODEPOINT_ENTER : (uint32_t)CODEPOINT_FOCUS_NEXT,
         two_button_mode ? (uint32_t)CODEPOINT_ESCAPE : (uint32_t)CODEPOINT_ENTER,
         &internal->primary
     );
@@ -112,7 +112,7 @@ static error_t start(Device* device) {
         return error;
     }
 
-    error = acquire_button(config->pin_secondary, CODEPOINT_ARROW_DOWN, CODEPOINT_ARROW_UP, &internal->secondary);
+    error = acquire_button(config->pin_secondary, CODEPOINT_FOCUS_NEXT, CODEPOINT_FOCUS_PREVIOUS, &internal->secondary);
     if (error != ERROR_NONE) {
         if (internal->primary.in_use) {
             gpio_descriptor_release(internal->primary.descriptor);

Drivers/gpio-encoder-module/bindings/tactility,gpio-encoder.yaml

@@ -1,7 +1,7 @@
 description: >
   GPIO-attached rotary encoder wheel - a 2-phase quadrature encoder (decoded via the ESP32
   hardware PCNT peripheral) plus an optional separate click/enter button. Exposes a
-  KEYBOARD_TYPE device: each wheel detent is translated to an arrow up/down key, and the
+  KEYBOARD_TYPE device: each wheel detent is translated to a focus next/previous key, and the
   button (if present) press/release is translated to the enter key.
 
 compatible: "tactility,gpio-encoder"

Drivers/gpio-encoder-module/source/gpio_encoder.cpp

@@ -262,7 +262,7 @@ static void poll_wheel(GpioEncoderInternal* internal) {
     int32_t detents = total / internal->pulses_per_detent;
     internal->pulse_remainder = total % internal->pulses_per_detent;
 
-    uint32_t key = detents >= 0 ? CODEPOINT_ARROW_DOWN : CODEPOINT_ARROW_UP;
+    uint32_t key = detents >= 0 ? CODEPOINT_FOCUS_NEXT : CODEPOINT_FOCUS_PREVIOUS;
     int32_t count = detents >= 0 ? detents : -detents;
     for (int32_t i = 0; i < count; i++) {
         // A press without its matching release would leave the consumer thinking the key

Modules/lvgl-module/CMakeLists.txt

@@ -29,6 +29,15 @@ else ()
     set(ui_density_variable "LVGL_UI_DENSITY_DEFAULT")
     message("UI density set to default: ${ui_density}")
 endif ()
+# Read the theme: whether the device uses dark mode by default
+GET_VALUE_FROM_MAP(device_properties "lvgl.theme" lvgl_theme)
+if (NOT lvgl_theme OR lvgl_theme STREQUAL "DefaultDark")
+    set(theme_dark 1)
+elseif (lvgl_theme STREQUAL "DefaultLight" OR lvgl_theme STREQUAL "Mono")
+    set(theme_dark 0)
+else ()
+    message(FATAL_ERROR "Invalid lvgl.theme: '${lvgl_theme}'. Must be 'DefaultDark', 'DefaultLight' or 'Mono'")
+endif ()
 
 # ####################################
 # Create module
@@ -74,4 +83,6 @@ target_compile_definitions(${MODULE_NAME} PUBLIC
     "-DLV_LVGL_H_INCLUDE_SIMPLE"
     # UiDensity
     "-DTT_LVGL_UI_DENSITY=${ui_density_variable}"
+    # Default theme mode: 1 for dark, 0 for light
+    "-DTT_LVGL_THEME_DARK=${theme_dark}"
 )

Modules/lvgl-module/include/lvgl/grid_navigation.h

@@ -0,0 +1,45 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#include <lvgl.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Lets the arrow keys move the focus between the container's children by their position, e.g. in a grid of buttons.
+ * The container takes the place of its children in the focus group. Moving past the first or last row leaves the container.
+ * @param[in] container the container with the focusable children
+ */
+void lvgl_grid_navigation_add(lv_obj_t* container);
+
+/**
+ * @brief Turns grid navigation off again: the focusable children rejoin the container's focus group.
+ * @param[in] container a container that was passed to lvgl_grid_navigation_add()
+ */
+void lvgl_grid_navigation_remove(lv_obj_t* container);
+
+/**
+ * @brief Moves the focus to the next or previous child in their order, for devices that can only step through widgets.
+ * Past the last or first child, the focus moves to the next or previous object in the container's focus group.
+ * @param[in] container a container that was passed to lvgl_grid_navigation_add()
+ * @param[in] next true for the next child, false for the previous child
+ */
+void lvgl_grid_navigation_focus_next(lv_obj_t* container, bool next);
+
+/**
+ * @param[in] container a container that was passed to lvgl_grid_navigation_add()
+ * @return the focused child, or NULL when no child is focused
+ */
+lv_obj_t* lvgl_grid_navigation_get_focused(lv_obj_t* container);
+
+/**
+ * @param[in] obj the object to check
+ * @return true when the object is a container that was passed to lvgl_grid_navigation_add()
+ */
+bool lvgl_grid_navigation_is_container(const lv_obj_t* obj);
+
+#ifdef __cplusplus
+}
+#endif

Modules/lvgl-module/include/lvgl/theme.h

@@ -31,6 +31,12 @@ void lvgl_theme_get_settings(LvglThemeSettings* settings);
  */
 void lvgl_theme_get_default_settings(LvglThemeSettings* settings);
 
+/**
+ * @brief Checks whether the active theme is the monochrome theme: on monochrome and greyscale displays, or when selected in the settings.
+ * @return true when the monochrome theme is active
+ */
+bool lvgl_theme_is_mono(void);
+
 /**
  * @brief Sets the theme settings. They are used for displays that are added afterwards, e.g. when LVGL (re)starts.
  * @param[in] settings the theme settings

Modules/lvgl-module/include/lvgl/widgets/badge.h

@@ -0,0 +1,20 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#include <lvgl.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Creates a badge: a small dot that marks its parent (e.g. a favourite item).
+ * The theme determines its size and colour. It ignores the parent's layout, so the app aligns it (e.g. LV_ALIGN_TOP_RIGHT).
+ * @param[in] parent the object to mark
+ * @return the created badge
+ */
+lv_obj_t* lvgl_badge_create(lv_obj_t* parent);
+
+#ifdef __cplusplus
+}
+#endif

Modules/lvgl-module/source/devices/keyboard.cpp

@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: Apache-2.0
 #include <lvgl/devices/keyboard.h>
 #include <lvgl/devices/device_context.h>
+#include <lvgl/grid_navigation.h>
 #include <lvgl/lvgl.h>
 
 #include <tactility/drivers/keyboard.h>
@@ -55,6 +56,8 @@ static uint32_t codepoint_to_lv_key(uint32_t key) {
         case CODEPOINT_ARROW_UP: return LV_KEY_PREV;
         case CODEPOINT_ARROW_RIGHT: return LV_KEY_RIGHT;
         case CODEPOINT_ARROW_DOWN: return LV_KEY_NEXT;
+        case CODEPOINT_FOCUS_NEXT: return LV_KEY_NEXT;
+        case CODEPOINT_FOCUS_PREVIOUS: return LV_KEY_PREV;
         case CODEPOINT_HOME: return LV_KEY_HOME;
         case CODEPOINT_END: return LV_KEY_END;
         default: return key;
@@ -72,6 +75,25 @@ static void lvgl_keyboard_read_cb(lv_indev_t* indev, lv_indev_data_t* data) {
     }
 
     data->key = codepoint_to_lv_key(key_data.key);
+    lv_group_t* group = lv_indev_get_group(indev);
+    lv_obj_t* focused = group != nullptr ? lv_group_get_focused(group) : nullptr;
+    if (lvgl_grid_navigation_is_container(focused)) {
+        if (key_data.key == CODEPOINT_ARROW_UP) {
+            // Grid navigation moves the focus in two dimensions with the arrow keys
+            data->key = LV_KEY_UP;
+        } else if (key_data.key == CODEPOINT_ARROW_DOWN) {
+            data->key = LV_KEY_DOWN;
+        } else if (key_data.key == CODEPOINT_FOCUS_NEXT || key_data.key == CODEPOINT_FOCUS_PREVIOUS) {
+            // Devices that can only step through widgets visit the children in their order.
+            // LVGL doesn't see these keys: the group would skip the children, as only the container is in the group.
+            if (key_data.pressed) {
+                lvgl_grid_navigation_focus_next(focused, key_data.key == CODEPOINT_FOCUS_NEXT);
+            }
+            data->state = LV_INDEV_STATE_RELEASED;
+            data->continue_reading = key_data.continue_reading;
+            return;
+        }
+    }
     data->state = key_data.pressed ? LV_INDEV_STATE_PRESSED : LV_INDEV_STATE_RELEASED;
     data->continue_reading = key_data.continue_reading;
 }

Modules/lvgl-module/source/grid_navigation.cpp

@@ -0,0 +1,107 @@
+// SPDX-License-Identifier: Apache-2.0
+#include <lvgl/grid_navigation.h>
+
+// Marks containers with grid navigation, so the keyboard sends them up and down keys
+constexpr lv_obj_flag_t GRID_NAVIGATION_FLAG = LV_OBJ_FLAG_USER_1;
+
+static void remove_from_group(lv_obj_t* child) {
+    if (lv_obj_get_group(child) != nullptr) {
+        lv_group_remove_obj(child);
+    }
+}
+
+// Children join the default group when they're created, but grid navigation focuses them through the container
+static void on_child_created(lv_event_t* event) {
+    auto* child = static_cast<lv_obj_t*>(lv_event_get_param(event));
+    auto* container = lv_event_get_current_target_obj(event);
+    if (child != nullptr && lv_obj_get_parent(child) == container) {
+        remove_from_group(child);
+    }
+}
+
+void lvgl_grid_navigation_add(lv_obj_t* container) {
+    lv_gridnav_add(container, LV_GRIDNAV_CTRL_NONE);
+    lv_obj_add_flag(container, GRID_NAVIGATION_FLAG);
+
+    const uint32_t child_count = lv_obj_get_child_count(container);
+    for (uint32_t i = 0; i < child_count; i++) {
+        remove_from_group(lv_obj_get_child(container, static_cast<int32_t>(i)));
+    }
+    lv_obj_add_event_cb(container, on_child_created, LV_EVENT_CHILD_CREATED, nullptr);
+
+    auto* group = lv_group_get_default();
+    if (group != nullptr && lv_obj_get_group(container) == nullptr) {
+        lv_group_add_obj(group, container);
+    }
+}
+
+void lvgl_grid_navigation_remove(lv_obj_t* container) {
+    if (!lvgl_grid_navigation_is_container(container)) {
+        return;
+    }
+    lv_obj_t* focused_child = lvgl_grid_navigation_get_focused(container);
+    lv_group_t* group = lv_obj_get_group(container);
+    const bool container_focused = group != nullptr && lv_group_get_focused(group) == container;
+
+    lv_gridnav_remove(container);
+    lv_obj_remove_event_cb(container, on_child_created);
+    lv_obj_remove_flag(container, GRID_NAVIGATION_FLAG);
+
+    if (group == nullptr) {
+        return;
+    }
+    // The children are added at the end of the group
+    const uint32_t child_count = lv_obj_get_child_count(container);
+    for (uint32_t i = 0; i < child_count; i++) {
+        auto* child = lv_obj_get_child(container, static_cast<int32_t>(i));
+        if (lv_obj_is_group_def(child) && lv_obj_get_group(child) == nullptr) {
+            lv_group_add_obj(group, child);
+        }
+    }
+    if (container_focused && focused_child != nullptr) {
+        lv_group_focus_obj(focused_child);
+    }
+}
+
+// Matches which children grid navigation can focus
+static bool is_focusable(lv_obj_t* obj) {
+    return !lv_obj_has_flag(obj, LV_OBJ_FLAG_HIDDEN) && lv_obj_has_flag_any(obj, static_cast<lv_obj_flag_t>(LV_OBJ_FLAG_CLICKABLE | LV_OBJ_FLAG_CLICK_FOCUSABLE));
+}
+
+void lvgl_grid_navigation_focus_next(lv_obj_t* container, bool next) {
+    const auto child_count = static_cast<int32_t>(lv_obj_get_child_count(container));
+    lv_obj_t* focused = lvgl_grid_navigation_get_focused(container);
+    int32_t index = focused != nullptr ? lv_obj_get_index(focused) : (next ? -1 : child_count);
+    for (index += next ? 1 : -1; index >= 0 && index < child_count; index += next ? 1 : -1) {
+        auto* child = lv_obj_get_child(container, index);
+        if (is_focusable(child)) {
+            lv_gridnav_set_focused(container, child, LV_ANIM_ON);
+            return;
+        }
+    }
+
+    lv_group_t* group = lv_obj_get_group(container);
+    if (group != nullptr) {
+        if (next) {
+            lv_group_focus_next(group);
+        } else {
+            lv_group_focus_prev(group);
+        }
+    }
+}
+
+lv_obj_t* lvgl_grid_navigation_get_focused(lv_obj_t* container) {
+    // Grid navigation marks the focused child with the focused state
+    const uint32_t child_count = lv_obj_get_child_count(container);
+    for (uint32_t i = 0; i < child_count; i++) {
+        auto* child = lv_obj_get_child(container, static_cast<int32_t>(i));
+        if (lv_obj_has_state(child, LV_STATE_FOCUSED)) {
+            return child;
+        }
+    }
+    return nullptr;
+}
+
+bool lvgl_grid_navigation_is_container(const lv_obj_t* obj) {
+    return obj != nullptr && lv_obj_has_flag(obj, GRID_NAVIGATION_FLAG);
+}

Modules/lvgl-module/source/symbols.c

@@ -10,7 +10,9 @@
 #include <lvgl/devices/pointer.h>
 
 #include <lvgl/widgets/sliderbox.h>
+#include <lvgl/grid_navigation.h>
 #include <lvgl/theme.h>
+#include <lvgl/widgets/badge.h>
 #include <lvgl/widgets/card.h>
 #include <lvgl/widgets/chip.h>
 #include <lvgl/widgets/icon_button.h>
@@ -60,10 +62,19 @@ const struct ModuleSymbol lvgl_module_symbols[] = {
     DEFINE_MODULE_SYMBOL(lvgl_pointer_add),
     DEFINE_MODULE_SYMBOL(lvgl_pointer_get_slot_index),
     DEFINE_MODULE_SYMBOL(lvgl_pointer_remove),
+    // lvgl_grid_navigation
+    DEFINE_MODULE_SYMBOL(lvgl_grid_navigation_add),
+    DEFINE_MODULE_SYMBOL(lvgl_grid_navigation_remove),
+    DEFINE_MODULE_SYMBOL(lvgl_grid_navigation_focus_next),
+    DEFINE_MODULE_SYMBOL(lvgl_grid_navigation_get_focused),
+    DEFINE_MODULE_SYMBOL(lvgl_grid_navigation_is_container),
     // lvgl_theme
     DEFINE_MODULE_SYMBOL(lvgl_theme_get_settings),
     DEFINE_MODULE_SYMBOL(lvgl_theme_get_default_settings),
     DEFINE_MODULE_SYMBOL(lvgl_theme_set_settings),
+    DEFINE_MODULE_SYMBOL(lvgl_theme_is_mono),
+    // lvgl_badge
+    DEFINE_MODULE_SYMBOL(lvgl_badge_create),
     // lvgl_card
     DEFINE_MODULE_SYMBOL(lvgl_card_create),
     // lvgl_chip

Modules/lvgl-module/source/theme.cpp

@@ -23,11 +23,7 @@ static ActiveTheme active_theme = ActiveTheme::None;
 void lvgl_theme_get_default_settings(LvglThemeSettings* settings) {
     lv_theme_material_config_t material_config;
     lv_theme_material_config_init(&material_config);
-#if defined(LV_THEME_DEFAULT_DARK) && LV_THEME_DEFAULT_DARK
-    settings->is_dark = true;
-#else
-    settings->is_dark = false;
-#endif
+    settings->is_dark = TT_LVGL_THEME_DARK;
     settings->is_mono = false;
     settings->animations_enabled = true;
     settings->color_primary = material_config.color_primary;
@@ -48,6 +44,10 @@ void lvgl_theme_set_settings(const LvglThemeSettings* settings) {
     theme_settings_set = true;
 }
 
+bool lvgl_theme_is_mono() {
+    return active_theme == ActiveTheme::MaterialMono;
+}
+
 static lv_theme_t* get_active_theme() {
     switch (active_theme) {
         case ActiveTheme::Material:

Modules/lvgl-module/source/themes/lv_theme_material.c

@@ -15,6 +15,7 @@ extern const lv_obj_class_t lvgl_icon_button_tonal_class;
 extern const lv_obj_class_t lvgl_sliderbox_class;
 extern const lv_obj_class_t lvgl_card_class;
 extern const lv_obj_class_t lvgl_chip_class;
+extern const lv_obj_class_t lvgl_badge_class;
 
 #define NEUTRAL_4 lv_color_hex(0x0E0E0E)
 #define NEUTRAL_6 lv_color_hex(0x131313)
@@ -136,6 +137,8 @@ extern const lv_obj_class_t lvgl_chip_class;
 #define CHIP_SHAPE (theme->config.is_compact ? CORNER_COMPACT : CORNER_SMALL)
 #define CHIP_PAD_HOR (theme->config.is_compact ? 3 : SPACE_4)
 #define CHIP_PAD_VER (theme->config.is_compact ? 2 : LV_DPX_CALC(theme->disp_dpi, 6))
+#define BADGE_COLOR COLOR_PRIMARY
+#define BADGE_SIZE (theme->config.is_compact ? 4 : LV_DPX_CALC(theme->disp_dpi, 6))
 #define SCROLLBAR_COLOR COLOR_OUTLINE
 #define SCROLLBAR_OPACITY (LV_OPA_40)
 #define SCROLLBAR_SCROLLED_OPACITY (LV_OPA_70)
@@ -159,7 +162,6 @@ extern const lv_obj_class_t lvgl_chip_class;
 #define TEXT_BUTTON_PRESSED_CONTAINER_COLOR COLOR_PRIMARY
 #define TEXT_BUTTON_PAD_HOR (theme->config.is_compact ? 3 : SPACE_3)
 #define ICON_BUTTON_COLOR COLOR_ON_SURFACE_VARIANT
-#define ICON_BUTTON_SELECTED_COLOR COLOR_PRIMARY
 #define ICON_BUTTON_CONTAINER_SHAPE (theme->config.is_compact ? CORNER_COMPACT : CORNER_LARGE)
 #define ICON_BUTTON_FILLED_COLOR COLOR_PRIMARY
 #define ICON_BUTTON_FILLED_ICON_COLOR COLOR_ON_PRIMARY
@@ -332,6 +334,7 @@ typedef struct {
     lv_style_t screen;
     lv_style_t container;
     lv_style_t card;
+    lv_style_t badge;
     lv_style_t chip;
     lv_style_t chip_selected;
 #if LV_USE_BUTTON
@@ -354,13 +357,11 @@ typedef struct {
     lv_style_t text_button_pressed;
 #endif
     lv_style_t icon_button;
-    lv_style_t icon_button_selected;
     lv_style_t icon_button_filled;
     lv_style_t icon_button_filled_pressed;
     lv_style_t icon_button_tonal;
     lv_style_t icon_button_tonal_pressed;
     lv_style_t app_bar;
-    lv_style_t app_bar_actions;
     lv_style_t app_bar_button;
     lv_style_t app_bar_button_pressed;
     lv_style_t app_bar_focus_ring;
@@ -757,6 +758,13 @@ static void style_init(my_theme_t * theme)
     lv_style_set_pad_all(&theme->styles.card, CARD_PAD);
     lv_style_set_pad_gap(&theme->styles.card, CARD_GAP);
 
+    style_init_reset(&theme->styles.badge);
+    lv_style_set_width(&theme->styles.badge, BADGE_SIZE);
+    lv_style_set_height(&theme->styles.badge, BADGE_SIZE);
+    lv_style_set_radius(&theme->styles.badge, LV_RADIUS_CIRCLE);
+    lv_style_set_bg_color(&theme->styles.badge, BADGE_COLOR);
+    lv_style_set_bg_opa(&theme->styles.badge, LV_OPA_COVER);
+
     style_init_reset(&theme->styles.chip);
     lv_style_set_bg_opa(&theme->styles.chip, LV_OPA_TRANSP);
     lv_style_set_text_color(&theme->styles.chip, CHIP_LABEL_COLOR);
@@ -827,9 +835,6 @@ static void style_init(my_theme_t * theme)
     lv_style_set_radius(&theme->styles.icon_button, BUTTON_SHAPE);
     lv_style_set_pad_all(&theme->styles.icon_button, BUTTON_PAD_VER);
 
-    style_init_reset(&theme->styles.icon_button_selected);
-    lv_style_set_text_color(&theme->styles.icon_button_selected, ICON_BUTTON_SELECTED_COLOR);
-
     style_init_reset(&theme->styles.icon_button_filled);
     lv_style_set_bg_color(&theme->styles.icon_button_filled, ICON_BUTTON_FILLED_COLOR);
     lv_style_set_bg_opa(&theme->styles.icon_button_filled, LV_OPA_COVER);
@@ -860,13 +865,6 @@ static void style_init(my_theme_t * theme)
     lv_style_set_pad_ver(&theme->styles.app_bar, 0);
     lv_style_set_pad_gap(&theme->styles.app_bar, APP_BAR_GAP);
 
-    style_init_reset(&theme->styles.app_bar_actions);
-    lv_style_set_bg_opa(&theme->styles.app_bar_actions, LV_OPA_TRANSP);
-    lv_style_set_border_width(&theme->styles.app_bar_actions, 0);
-    lv_style_set_radius(&theme->styles.app_bar_actions, 0);
-    lv_style_set_pad_all(&theme->styles.app_bar_actions, 0);
-    lv_style_set_pad_gap(&theme->styles.app_bar_actions, APP_BAR_GAP);
-
     style_init_reset(&theme->styles.app_bar_button);
     lv_style_set_pad_all(&theme->styles.app_bar_button, 0);
     lv_style_set_text_color(&theme->styles.app_bar_button, APP_BAR_CONTENT_COLOR);
@@ -1611,11 +1609,6 @@ static void theme_apply(lv_theme_t * th, lv_obj_t * obj)
             return;
         }
 #endif
-        /* toolbar > obj */
-        if(lv_obj_check_type(parent, &lvgl_toolbar_class)) {
-            lv_obj_add_style(obj, &theme->styles.app_bar_actions, 0);
-            return;
-        }
         /* obj */
         lv_obj_add_style(obj, &theme->styles.container, 0);
         lv_obj_add_style(obj, &theme->styles.scrollbar, LV_PART_SCROLLBAR);
@@ -1699,21 +1692,8 @@ static void theme_apply(lv_theme_t * th, lv_obj_t * obj)
             lv_obj_add_style(obj, &theme->styles.disabled, LV_STATE_DISABLED);
             return;
         }
-        /* toolbar > obj > icon_button */
-        if(lv_obj_check_type(lss_ancestor(obj, 2), &lvgl_toolbar_class) && lv_obj_check_type(parent, &lv_obj_class)) {
-            lv_obj_add_style(obj, &theme->styles.icon_button, 0);
-            lv_obj_add_style(obj, &theme->styles.app_bar_button, 0);
-            lv_obj_add_style(obj, &theme->styles.transition_exit, 0);
-            lv_obj_add_style(obj, &theme->styles.app_bar_button_pressed, LV_STATE_PRESSED);
-            lv_obj_add_style(obj, &theme->styles.transition_enter, LV_STATE_PRESSED);
-            lv_obj_add_style(obj, &theme->styles.app_bar_focus_ring, LV_STATE_FOCUS_KEY);
-            lv_obj_add_style(obj, &theme->styles.app_bar_focus_ring, LV_STATE_EDITED);
-            lv_obj_add_style(obj, &theme->styles.disabled, LV_STATE_DISABLED);
-            return;
-        }
         /* icon_button */
         lv_obj_add_style(obj, &theme->styles.icon_button, 0);
-        lv_obj_add_style(obj, &theme->styles.icon_button_selected, LV_STATE_CHECKED);
         lv_obj_add_style(obj, &theme->styles.transition_exit, 0);
         lv_obj_add_style(obj, &theme->styles.state_pressed, LV_STATE_PRESSED);
         lv_obj_add_style(obj, &theme->styles.transition_enter, LV_STATE_PRESSED);
@@ -1724,8 +1704,8 @@ static void theme_apply(lv_theme_t * th, lv_obj_t * obj)
     }
 #if LV_USE_DROPDOWN
     if(lv_obj_check_type(obj, &lv_dropdown_class)) {
-        /* toolbar > obj > dropdown */
-        if(lv_obj_check_type(lss_ancestor(obj, 2), &lvgl_toolbar_class) && lv_obj_check_type(parent, &lv_obj_class)) {
+        /* toolbar > dropdown */
+        if(lv_obj_check_type(parent, &lvgl_toolbar_class)) {
             lv_obj_add_style(obj, &theme->styles.field, 0);
             lv_obj_add_style(obj, &theme->styles.transition_exit, 0);
             lv_obj_add_style(obj, &theme->styles.state_pressed, LV_STATE_PRESSED);
@@ -1853,6 +1833,11 @@ static void theme_apply(lv_theme_t * th, lv_obj_t * obj)
         return;
     }
 #endif
+    if(lv_obj_check_type(obj, &lvgl_badge_class)) {
+        /* badge */
+        lv_obj_add_style(obj, &theme->styles.badge, 0);
+        return;
+    }
     if(lv_obj_check_type(obj, &lvgl_chip_class)) {
         /* chip */
         lv_obj_add_style(obj, &theme->styles.chip, 0);

Modules/lvgl-module/source/themes/lv_theme_material_mono.c

@@ -15,6 +15,7 @@ extern const lv_obj_class_t lvgl_icon_button_tonal_class;
 extern const lv_obj_class_t lvgl_sliderbox_class;
 extern const lv_obj_class_t lvgl_card_class;
 extern const lv_obj_class_t lvgl_chip_class;
+extern const lv_obj_class_t lvgl_badge_class;
 
 #define BLACK lv_color_black()
 #define WHITE lv_color_white()
@@ -86,6 +87,8 @@ extern const lv_obj_class_t lvgl_chip_class;
 #define CHIP_SHAPE (theme->config.is_compact ? CORNER_COMPACT : CORNER_SMALL)
 #define CHIP_PAD_HOR (theme->config.is_compact ? 3 : SPACE_4)
 #define CHIP_PAD_VER (theme->config.is_compact ? 2 : SPACE_2)
+#define BADGE_COLOR COLOR_ON_SURFACE
+#define BADGE_SIZE (theme->config.is_compact ? 4 : LV_DPX_CALC(theme->disp_dpi, 6))
 #define SCROLLBAR_COLOR COLOR_ON_SURFACE
 #define SCROLLBAR_WIDTH (theme->config.is_compact ? 2 : LV_DPX_CALC(theme->disp_dpi, 3))
 #define SCROLLBAR_PAD 1
@@ -213,17 +216,16 @@ typedef struct {
     lv_style_t screen;
     lv_style_t container;
     lv_style_t card;
+    lv_style_t badge;
     lv_style_t chip;
 #if LV_USE_BUTTON || LV_USE_MSGBOX
     lv_style_t button;
 #endif
     lv_style_t icon_button;
-    lv_style_t icon_button_selected;
     lv_style_t icon_button_filled;
     lv_style_t icon_button_filled_pressed;
     lv_style_t icon_button_tonal;
     lv_style_t app_bar;
-    lv_style_t app_bar_actions;
     lv_style_t app_bar_button;
     lv_style_t app_bar_focus_ring;
 #if LV_USE_SWITCH
@@ -546,6 +548,13 @@ static void style_init(my_theme_t * theme)
     lv_style_set_pad_all(&theme->styles.card, CARD_PAD);
     lv_style_set_pad_gap(&theme->styles.card, CARD_GAP);
 
+    style_init_reset(&theme->styles.badge);
+    lv_style_set_width(&theme->styles.badge, BADGE_SIZE);
+    lv_style_set_height(&theme->styles.badge, BADGE_SIZE);
+    lv_style_set_radius(&theme->styles.badge, LV_RADIUS_CIRCLE);
+    lv_style_set_bg_color(&theme->styles.badge, BADGE_COLOR);
+    lv_style_set_bg_opa(&theme->styles.badge, LV_OPA_COVER);
+
     style_init_reset(&theme->styles.chip);
     lv_style_set_bg_color(&theme->styles.chip, COLOR_SURFACE);
     lv_style_set_bg_opa(&theme->styles.chip, LV_OPA_COVER);
@@ -576,10 +585,6 @@ static void style_init(my_theme_t * theme)
     lv_style_set_radius(&theme->styles.icon_button, BUTTON_SHAPE);
     lv_style_set_pad_all(&theme->styles.icon_button, BUTTON_PAD_VER);
 
-    style_init_reset(&theme->styles.icon_button_selected);
-    lv_style_set_border_color(&theme->styles.icon_button_selected, COLOR_OUTLINE);
-    lv_style_set_border_width(&theme->styles.icon_button_selected, BORDER);
-
     style_init_reset(&theme->styles.icon_button_filled);
     lv_style_set_bg_color(&theme->styles.icon_button_filled, ICON_BUTTON_FILLED_COLOR);
     lv_style_set_bg_opa(&theme->styles.icon_button_filled, LV_OPA_COVER);
@@ -614,13 +619,6 @@ static void style_init(my_theme_t * theme)
     lv_style_set_pad_ver(&theme->styles.app_bar, 0);
     lv_style_set_pad_gap(&theme->styles.app_bar, APP_BAR_GAP);
 
-    style_init_reset(&theme->styles.app_bar_actions);
-    lv_style_set_bg_opa(&theme->styles.app_bar_actions, LV_OPA_TRANSP);
-    lv_style_set_border_width(&theme->styles.app_bar_actions, 0);
-    lv_style_set_radius(&theme->styles.app_bar_actions, 0);
-    lv_style_set_pad_all(&theme->styles.app_bar_actions, 0);
-    lv_style_set_pad_gap(&theme->styles.app_bar_actions, APP_BAR_GAP);
-
     style_init_reset(&theme->styles.app_bar_button);
     lv_style_set_pad_all(&theme->styles.app_bar_button, 0);
 
@@ -1262,11 +1260,6 @@ static void theme_apply(lv_theme_t * th, lv_obj_t * obj)
             return;
         }
 #endif
-        /* toolbar > obj */
-        if(lv_obj_check_type(parent, &lvgl_toolbar_class)) {
-            lv_obj_add_style(obj, &theme->styles.app_bar_actions, 0);
-            return;
-        }
         /* obj */
         lv_obj_add_style(obj, &theme->styles.container, 0);
         lv_obj_add_style(obj, &theme->styles.scrollbar, LV_PART_SCROLLBAR);
@@ -1333,19 +1326,8 @@ static void theme_apply(lv_theme_t * th, lv_obj_t * obj)
             lv_obj_add_style(obj, &theme->styles.disabled, LV_STATE_DISABLED);
             return;
         }
-        /* toolbar > obj > icon_button */
-        if(lv_obj_check_type(lss_ancestor(obj, 2), &lvgl_toolbar_class) && lv_obj_check_type(parent, &lv_obj_class)) {
-            lv_obj_add_style(obj, &theme->styles.icon_button, 0);
-            lv_obj_add_style(obj, &theme->styles.app_bar_button, 0);
-            lv_obj_add_style(obj, &theme->styles.inverted, LV_STATE_PRESSED);
-            lv_obj_add_style(obj, &theme->styles.app_bar_focus_ring, LV_STATE_FOCUS_KEY);
-            lv_obj_add_style(obj, &theme->styles.app_bar_focus_ring, LV_STATE_EDITED);
-            lv_obj_add_style(obj, &theme->styles.disabled, LV_STATE_DISABLED);
-            return;
-        }
         /* icon_button */
         lv_obj_add_style(obj, &theme->styles.icon_button, 0);
-        lv_obj_add_style(obj, &theme->styles.icon_button_selected, LV_STATE_CHECKED);
         lv_obj_add_style(obj, &theme->styles.inverted, LV_STATE_PRESSED);
         lv_obj_add_style(obj, &theme->styles.focus_ring_inset, LV_STATE_FOCUS_KEY);
         lv_obj_add_style(obj, &theme->styles.edit_ring_inset, LV_STATE_EDITED);
@@ -1446,6 +1428,11 @@ static void theme_apply(lv_theme_t * th, lv_obj_t * obj)
         return;
     }
 #endif
+    if(lv_obj_check_type(obj, &lvgl_badge_class)) {
+        /* badge */
+        lv_obj_add_style(obj, &theme->styles.badge, 0);
+        return;
+    }
     if(lv_obj_check_type(obj, &lvgl_chip_class)) {
         /* chip */
         lv_obj_add_style(obj, &theme->styles.chip, 0);

Modules/lvgl-module/source/widgets/badge.cpp

@@ -0,0 +1,33 @@
+// SPDX-License-Identifier: Apache-2.0
+#define LV_USE_PRIVATE_API 1 // For the lv_obj_class_t declaration
+
+#include <lvgl/widgets/badge.h>
+
+static void badge_constructor(const lv_obj_class_t* class_p, lv_obj_t* obj) {
+    LV_UNUSED(class_p);
+    lv_obj_remove_flag(obj, LV_OBJ_FLAG_CLICKABLE);
+    lv_obj_remove_flag(obj, LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_add_flag(obj, LV_OBJ_FLAG_IGNORE_LAYOUT);
+}
+
+// Not static: the theme styles badges by this class
+extern "C" const lv_obj_class_t lvgl_badge_class = {
+    .base_class = &lv_obj_class,
+    .constructor_cb = badge_constructor,
+    .destructor_cb = nullptr,
+    .event_cb = nullptr,
+    .user_data = nullptr,
+    .name = "badge",
+    .width_def = 0,
+    .height_def = 0,
+    .editable = LV_OBJ_CLASS_EDITABLE_INHERIT,
+    .group_def = LV_OBJ_CLASS_GROUP_DEF_FALSE,
+    .instance_size = 0,
+    .theme_inheritable = LV_OBJ_CLASS_THEME_INHERITABLE_FALSE
+};
+
+lv_obj_t* lvgl_badge_create(lv_obj_t* parent) {
+    lv_obj_t* obj = lv_obj_class_create_obj(&lvgl_badge_class, parent);
+    lv_obj_class_init_obj(obj);
+    return obj;
+}

Modules/lvgl-module/source/widgets/toolbar.cpp

@@ -4,12 +4,16 @@
 #include <lvgl/widgets/toolbar.h>
 
 #include <lvgl/fonts.h>
+#include <lvgl/grid_navigation.h>
 #include <lvgl/lvgl.h>
 #include <lvgl/widgets/icon_button.h>
 #include <lvgl/widgets/spinner.h>
 
 #include <tactility/check.h>
 #include <tactility/drivers/pointer.h>
+#include <tactility/log.h>
+
+constexpr auto* TAG = "lvgl_toolbar";
 
 static uint32_t getToolbarHeight(UiDensity uiDensity) {
     if (uiDensity == LVGL_UI_DENSITY_COMPACT) {
@@ -39,7 +43,6 @@ typedef struct {
     lv_obj_t* title_label;
     lv_obj_t* close_button;
     lv_obj_t* close_button_image;
-    lv_obj_t* action_container;
     uint8_t action_count;
     lv_event_cb_t nav_action_callback;
 } Toolbar;
@@ -99,6 +102,8 @@ lv_obj_t* lvgl_toolbar_create(lv_obj_t* parent, const char* title) {
     lv_obj_center(obj);
     lv_obj_set_flex_flow(obj, LV_FLEX_FLOW_ROW);
     lv_obj_set_flex_align(obj, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
+    // The arrow keys move between the close button and the actions, and up and down leave the toolbar
+    lvgl_grid_navigation_add(obj);
 
     toolbar->close_button = create_action_button(obj, ui_density);
     toolbar->close_button_image = lv_image_create(toolbar->close_button);
@@ -110,11 +115,6 @@ lv_obj_t* lvgl_toolbar_create(lv_obj_t* parent, const char* title) {
     lv_label_set_long_mode(toolbar->title_label, LV_LABEL_LONG_MODE_SCROLL);
     lv_obj_set_flex_grow(toolbar->title_label, 1);
 
-    toolbar->action_container = lv_obj_create(obj);
-    lv_obj_set_size(toolbar->action_container, LV_SIZE_CONTENT, LV_SIZE_CONTENT);
-    lv_obj_set_flex_flow(toolbar->action_container, LV_FLEX_FLOW_ROW);
-    lv_obj_set_flex_align(toolbar->action_container, LV_FLEX_ALIGN_START, LV_FLEX_ALIGN_CENTER, LV_FLEX_ALIGN_CENTER);
-
     lvgl_toolbar_set_nav_action(obj, LV_SYMBOL_CLOSE, &default_nav_action, nullptr);
 
     // If we don't have a touch device, we assume there's some other kind of input like a keyboard, an encoder or button control
@@ -122,8 +122,8 @@ lv_obj_t* lvgl_toolbar_create(lv_obj_t* parent, const char* title) {
     // an extra time for every screen.
     if (!device_has_active_by_type(&POINTER_TYPE)) {
         lv_obj_update_layout(obj); // Resolve flex layout first, so focus/state invalidate against final coords
-        lv_group_focus_obj(toolbar->close_button);
-        lv_obj_add_state(toolbar->close_button, LV_STATE_FOCUS_KEY);
+        lv_group_focus_obj(obj);
+        lv_gridnav_set_focused(obj, toolbar->close_button, LV_ANIM_OFF);
     }
 
     return obj;
@@ -151,7 +151,7 @@ static lv_obj_t* toolbar_add_button_action(lv_obj_t* obj, const char* imageOrBut
     check(toolbar->action_count < TOOLBAR_ACTION_LIMIT, "max actions reached");
     toolbar->action_count++;
 
-    lv_obj_t* action_button = create_action_button(toolbar->action_container, lvgl_get_ui_density());
+    lv_obj_t* action_button = create_action_button(obj, lvgl_get_ui_density());
     lv_obj_add_event_cb(action_button, callback, LV_EVENT_SHORT_CLICKED, user_data);
     lv_obj_t* button_content;
     if (isImage) {
@@ -179,7 +179,7 @@ lv_obj_t* lvgl_toolbar_add_switch_action(lv_obj_t* obj) {
     check(toolbar->action_count < TOOLBAR_ACTION_LIMIT, "max actions reached");
     toolbar->action_count++;
 
-    return lv_switch_create(toolbar->action_container);
+    return lv_switch_create(obj);
 }
 
 lv_obj_t* lvgl_toolbar_add_dropdown_action(lv_obj_t* obj, const char* options, lv_coord_t width, const char* text) {
@@ -187,7 +187,11 @@ lv_obj_t* lvgl_toolbar_add_dropdown_action(lv_obj_t* obj, const char* options, l
     check(toolbar->action_count < TOOLBAR_ACTION_LIMIT, "max actions reached");
     toolbar->action_count++;
 
-    lv_obj_t* widget = lv_dropdown_create(toolbar->action_container);
+    // The arrow keys can't both navigate the toolbar and the opened dropdown
+    LOG_W(TAG, "Dropdown actions are deprecated: the toolbar can't be navigated with the arrow keys when it has one");
+    lvgl_grid_navigation_remove(obj);
+
+    lv_obj_t* widget = lv_dropdown_create(obj);
     lv_dropdown_set_options(widget, options);
     lv_dropdown_set_selected_highlight(widget, false);
     if (width > 0) {
@@ -205,7 +209,7 @@ lv_obj_t* lvgl_toolbar_add_spinner_action(lv_obj_t* obj) {
     check(toolbar->action_count < TOOLBAR_ACTION_LIMIT, "max actions reached");
     toolbar->action_count++;
 
-    auto* spinner = lvgl_spinner_create(toolbar->action_container);
+    auto* spinner = lvgl_spinner_create(obj);
 
     if (lv_display_get_color_format(lv_obj_get_display(obj)) == LV_COLOR_FORMAT_L8) {
         lv_obj_set_style_image_recolor(spinner, lv_theme_get_color_secondary(obj), LV_STATE_DEFAULT);
@@ -217,6 +221,9 @@ lv_obj_t* lvgl_toolbar_add_spinner_action(lv_obj_t* obj) {
 
 void lvgl_toolbar_clear_actions(lv_obj_t* obj) {
     auto* toolbar = reinterpret_cast<Toolbar*>(obj);
-    lv_obj_clean(toolbar->action_container);
+    // The actions follow the close button and the title
+    while (lv_obj_get_child_count(obj) > 2) {
+        lv_obj_delete(lv_obj_get_child(obj, 2));
+    }
     toolbar->action_count = 0;
 }

Modules/lvgl-module/themes/material.lss

@@ -28,6 +28,7 @@
 @widget sliderbox: lvgl_sliderbox_class;
 @widget card: lvgl_card_class;
 @widget chip: lvgl_chip_class;
+@widget badge: lvgl_badge_class;
 
 // ============================================================
 // 1. Base tokens
@@ -198,6 +199,10 @@
 @chip-pad-hor: if($isCompact, 3, @space-4);
 @chip-pad-ver: if($isCompact, 2, 6dp);
 
+// Badge (lvgl_badge_create): a small dot that marks an item, e.g. a favourite
+@badge-color: @color-primary;
+@badge-size: if($isCompact, 4, 6dp);
+
 // Scrollbar
 @scrollbar-color: @color-outline;
 @scrollbar-opacity: 40%;
@@ -228,7 +233,6 @@
 
 // Icon button (dialog and window header buttons)
 @icon-button-color: @color-on-surface-variant;
-@icon-button-selected-color: @color-primary;
 
 // Filled and tonal icon buttons: Material 3 large icon buttons with a container
 @icon-button-container-shape: if($isCompact, @corner-compact, @corner-large);
@@ -561,6 +565,14 @@ card {
     padGap: @card-gap;
 }
 
+badge {
+    width: @badge-size;
+    height: @badge-size;
+    radius: circle;
+    bgColor: @badge-color;
+    bgOpa: cover;
+}
+
 chip {
     bgOpa: transp;
     textColor: @chip-label-color;
@@ -629,11 +641,6 @@ icon_button {
     padAll: @button-pad-ver;
 }
 
-// Material 3 selected (toggled) icon button
-icon_button_selected {
-    textColor: @icon-button-selected-color;
-}
-
 icon_button_filled {
     bgColor: @icon-button-filled-color;
     bgOpa: cover;
@@ -669,14 +676,6 @@ app_bar {
     padGap: @app-bar-gap;
 }
 
-app_bar_actions {
-    bgOpa: transp;
-    borderWidth: 0;
-    radius: 0;
-    padAll: 0;
-    padGap: @app-bar-gap;
-}
-
 app_bar_button {
     padAll: 0;
     textColor: @app-bar-content-color;
@@ -1229,10 +1228,6 @@ apply(calendar > obj) {
     // No styles
 }
 
-apply(toolbar > obj) {
-    app_bar_actions: default;
-}
-
 apply(obj) {
     container: default;
     scrollbar: part.scrollbar;
@@ -1272,7 +1267,7 @@ apply(button) {
     button_disabled: state.disabled;
 }
 
-apply(toolbar > icon_button, toolbar > obj > icon_button) {
+apply(toolbar > icon_button) {
     icon_button: default;
     app_bar_button: default;
     transition_exit: default;
@@ -1283,7 +1278,7 @@ apply(toolbar > icon_button, toolbar > obj > icon_button) {
     disabled: state.disabled;
 }
 
-apply(toolbar > obj > dropdown) {
+apply(toolbar > dropdown) {
     @include dropdown;
     app_bar_field: default;
     app_bar_focus_ring: state.focusKey;
@@ -1295,7 +1290,6 @@ apply(toolbar) {
 
 apply(icon_button) {
     icon_button: default;
-    icon_button_selected: state.checked;
     transition_exit: default;
     state_pressed: state.pressed;
     transition_enter: state.pressed;
@@ -1380,6 +1374,10 @@ apply(checkbox) {
     disabled: state.disabled;
 }
 
+apply(badge) {
+    badge: default;
+}
+
 apply(chip) {
     chip: default;
     transition_exit: default;

Modules/lvgl-module/themes/material_mono.lss

@@ -29,6 +29,7 @@
 @widget sliderbox: lvgl_sliderbox_class;
 @widget card: lvgl_card_class;
 @widget chip: lvgl_chip_class;
+@widget badge: lvgl_badge_class;
 
 // ============================================================
 // 1. Base tokens
@@ -141,6 +142,10 @@
 @chip-pad-hor: if($isCompact, 3, @space-4);
 @chip-pad-ver: if($isCompact, 2, @space-2);
 
+// Badge (lvgl_badge_create): a small dot that marks an item, e.g. a favourite
+@badge-color: @color-on-surface;
+@badge-size: if($isCompact, 4, 6dp);
+
 // Scrollbar
 @scrollbar-color: @color-on-surface;
 @scrollbar-width: if($isCompact, 2, 3dp);
@@ -387,6 +392,14 @@ card {
     padGap: @card-gap;
 }
 
+badge {
+    width: @badge-size;
+    height: @badge-size;
+    radius: circle;
+    bgColor: @badge-color;
+    bgOpa: cover;
+}
+
 chip {
     bgColor: @color-surface;
     bgOpa: cover;
@@ -418,12 +431,6 @@ icon_button {
     padAll: @button-pad-ver;
 }
 
-// Selected (toggled) icon button: outlined, as there is no colour to show it with
-icon_button_selected {
-    borderColor: @color-outline;
-    borderWidth: @border;
-}
-
 icon_button_filled {
     bgColor: @icon-button-filled-color;
     bgOpa: cover;
@@ -463,14 +470,6 @@ app_bar {
     padGap: @app-bar-gap;
 }
 
-app_bar_actions {
-    bgOpa: transp;
-    borderWidth: 0;
-    radius: 0;
-    padAll: 0;
-    padGap: @app-bar-gap;
-}
-
 app_bar_button {
     padAll: 0;
 }
@@ -937,10 +936,6 @@ apply(calendar > obj) {
     // No styles
 }
 
-apply(toolbar > obj) {
-    app_bar_actions: default;
-}
-
 apply(obj) {
     container: default;
     scrollbar: part.scrollbar;
@@ -956,7 +951,7 @@ apply(tabview > *[0] > button) {
     edit_ring: state.edited;
 }
 
-apply(toolbar > icon_button, toolbar > obj > icon_button) {
+apply(toolbar > icon_button) {
     icon_button: default;
     app_bar_button: default;
     inverted: state.pressed;
@@ -971,7 +966,6 @@ apply(toolbar) {
 
 apply(icon_button) {
     icon_button: default;
-    icon_button_selected: state.checked;
     inverted: state.pressed;
     focus_ring_inset: state.focusKey;
     edit_ring_inset: state.edited;
@@ -1043,6 +1037,10 @@ apply(checkbox) {
     disabled: part.indicator, state.disabled;
 }
 
+apply(badge) {
+    badge: default;
+}
+
 apply(chip) {
     chip: default;
     inverted: state.checked;

Tactility/Include/Tactility/app/selectiondialog/SelectionDialog.h

@@ -17,8 +17,7 @@ namespace tt::app::selectiondialog {
  * @a callerAppInstanceId (a new-model app - see app/manager.h). The caller receives the
  * result as an APP_EVENT_RESULT in its own event loop: result is the selected item's index
  * (>= 0), -1 if 0 items were provided (an error - the dialog auto-closes without showing
- * anything), or a value not matching any item (currently always 1) if the dialog was
- * dismissed without a selection. No result_bundle. If exactly 1 item is provided, the dialog
+ * anything), or -2 if the dialog was dismissed without a selection. No result_bundle. If exactly 1 item is provided, the dialog
  * auto-closes with result index 0 without showing anything. The caller is responsible for
  * calling app_manager_stop() on the returned instance id once it has handled the result.
  * @return the new dialog's app instance id

Tactility/Source/app/AppGrid.cpp

@@ -2,6 +2,8 @@
 
 #include <lvgl/devices/indev.h>
 #include <lvgl/fonts.h>
+#include <lvgl/grid_navigation.h>
+#include <lvgl/widgets/badge.h>
 #include <lvgl/widgets/icon_button.h>
 #include <lvgl/widgets/toolbar.h>
 
@@ -103,13 +105,14 @@ void AppGrid::requestRepopulate(bool keepSelection) {
 }
 
 void AppGrid::populate() {
-    // Captured before lv_obj_clean() deletes the currently focused tile below: LVGL moves
-    // focus elsewhere as it leaves the group, and creating replacement tiles doesn't restore
-    // it, so the app id is remembered here and re-focused on its new tile once rebuilt.
+    // Captured before lv_obj_clean() deletes the currently focused tile below: creating
+    // replacement tiles doesn't restore the focus, so the app id is remembered here and
+    // re-focused on its new tile once rebuilt.
     std::string focusedAppId;
     lv_group_t* group = lv_group_get_default();
     if (group != nullptr && keepSelectionOnRepopulate) {
-        lv_obj_t* focused = lv_group_get_focused(group);
+        // Grid navigation focuses the grid in the group, and a tile within the grid
+        lv_obj_t* focused = lv_group_get_focused(group) == grid ? lvgl_grid_navigation_get_focused(grid) : nullptr;
         if (focused != nullptr && lv_obj_get_parent(focused) == grid) {
             focusedAppId = static_cast<const AppGridItem*>(lv_obj_get_user_data(focused))->manifest.id;
         }
@@ -149,11 +152,8 @@ void AppGrid::populate() {
     for (uint32_t i = first; i < last; i++) {
         const auto& item = items[i];
 
-        // The theme styles the tile as an icon button: its focus, pressed and selected (favourite) states
+        // The theme styles the tile as an icon button, including its focus and pressed states
         lv_obj_t* tile = lvgl_icon_button_create(grid);
-        if (item.highlighted) {
-            lv_obj_add_state(tile, LV_STATE_CHECKED);
-        }
         lv_obj_set_size(tile, layout.tileWidth, layout.tileHeight);
         lv_obj_set_style_pad_all(tile, layout.pad, LV_STATE_DEFAULT);
         lv_obj_set_style_pad_row(tile, layout.pad / 2, LV_STATE_DEFAULT);
@@ -175,6 +175,12 @@ void AppGrid::populate() {
         lv_label_set_long_mode(label, LV_LABEL_LONG_MODE_DOTS);
         lv_label_set_text(label, item.manifest.name);
 
+        // A badge marks favourites, as it doesn't look like the focus indicator
+        if (item.highlighted) {
+            auto* badge = lvgl_badge_create(tile);
+            lv_obj_align(badge, LV_ALIGN_TOP_RIGHT, 0, 0);
+        }
+
         lv_obj_add_event_cb(tile, onTileClicked, LV_EVENT_SHORT_CLICKED, this);
         if (callbacks.onLongPressed != nullptr) {
             lv_obj_add_event_cb(tile, onTileLongPressed, LV_EVENT_LONG_PRESSED, this);
@@ -189,8 +195,8 @@ void AppGrid::populate() {
     }
 
     if (focusedTile != nullptr) {
-        lv_group_focus_obj(focusedTile);
-        lv_obj_add_state(focusedTile, LV_STATE_FOCUS_KEY);
+        lv_group_focus_obj(grid);
+        lv_gridnav_set_focused(grid, focusedTile, LV_ANIM_OFF);
     }
 }
 
@@ -207,6 +213,8 @@ void AppGrid::createWidgets(lv_obj_t* parent, lv_obj_t* toolbar) {
     lv_obj_set_style_pad_column(grid, TILE_GAP, LV_STATE_DEFAULT);
     lv_obj_set_style_border_width(grid, 0, LV_STATE_DEFAULT);
     lv_obj_remove_flag(grid, LV_OBJ_FLAG_SCROLLABLE);
+    // The arrow keys move between the tiles in rows and columns
+    lvgl_grid_navigation_add(grid);
 
     // Resolves the grid's flex_grow height, which the page size is derived from.
     lv_obj_update_layout(parent);

Tactility/Source/app/appearancesettings/AppearanceSettings.cpp

@@ -1,4 +1,5 @@
 #include <Tactility/app/fileselection/FileSelection.h>
+#include <Tactility/app/selectiondialog/SelectionDialog.h>
 #include <Tactility/file/File.h>
 #include <Tactility/lvgl/Fonts.h>
 #include <Tactility/lvgl/Lvgl.h>
@@ -73,6 +74,14 @@ constexpr NamedColor PALETTE_COLORS[] = {
     { "Grey", LV_PALETTE_GREY },
 };
 
+constexpr size_t COLOR_COUNT = 3;
+constexpr const char* COLOR_TITLES[COLOR_COUNT] = { "Primary color", "Secondary color", "Error color" };
+
+struct ColorRowWidgets {
+    lv_obj_t* row = nullptr;
+    lv_obj_t* swatch = nullptr;
+};
+
 struct FontRowWidgets {
     lv_obj_t* defaultButton = nullptr;
     lv_obj_t* fileLabel = nullptr;
@@ -84,6 +93,7 @@ struct Context {
     TaskEventGroup* eventGroup = nullptr;
     uint32_t selectRegularBit = 0;
     uint32_t selectMonoBit = 0;
+    uint32_t selectColorBit = 0;
     uint32_t applyBit = 0;
     uint32_t cacheUpdatedBit = 0;
 
@@ -101,6 +111,9 @@ struct Context {
     std::atomic<bool> cacheUpdateSucceeded = false;
 
     uint32_t selectLaunchId = 0;
+    /** The colour that the selection dialog is for */
+    size_t selectColorIndex = 0;
+    uint32_t colorSelectLaunchId = 0;
     FontSlot selectSlot = FontSlot::Regular;
     AppStream selectStream {};
     uint8_t selectBuffer[256] {};
@@ -115,7 +128,7 @@ struct Context {
     lv_obj_t* darkChip = nullptr;
     lv_obj_t* regularThemeChip = nullptr;
     lv_obj_t* monoThemeChip = nullptr;
-    lv_obj_t* colorRows[3] = {};
+    ColorRowWidgets colorRows[COLOR_COUNT];
     /** The display can only show the mono theme */
     bool isMonoDisplay = false;
 };
@@ -183,6 +196,8 @@ void setChecked(lv_obj_t* object, bool checked) {
     }
 }
 
+void updateColorRow(Context* ctx, size_t index);
+
 void updateThemeWidgets(Context* ctx) {
     const bool dark = isDark(ctx->pendingSettings);
     setChecked(ctx->lightChip, !dark);
@@ -192,9 +207,10 @@ void updateThemeWidgets(Context* ctx) {
         setChecked(ctx->monoThemeChip, ctx->pendingSettings.monoTheme);
     }
     // The mono theme doesn't use colours
-    for (auto* row : ctx->colorRows) {
-        if (row != nullptr) {
-            setHidden(row, ctx->pendingSettings.monoTheme);
+    for (size_t i = 0; i < COLOR_COUNT; i++) {
+        if (ctx->colorRows[i].row != nullptr) {
+            setHidden(ctx->colorRows[i].row, ctx->pendingSettings.monoTheme);
+            updateColorRow(ctx, i);
         }
     }
 }
@@ -256,18 +272,35 @@ uint32_t getPaletteColor(lv_palette_t palette) {
 
 constexpr size_t PALETTE_COLOR_COUNT = sizeof(PALETTE_COLORS) / sizeof(PALETTE_COLORS[0]);
 
-void onColorChanged(lv_event_t* event) {
-    auto* ctx = static_cast<Context*>(lv_event_get_user_data(event));
-    auto* dropdown = static_cast<lv_obj_t*>(lv_event_get_target(event));
-    auto* color = static_cast<std::optional<uint32_t>*>(lv_obj_get_user_data(dropdown));
-    const uint32_t selected = lv_dropdown_get_selected(dropdown);
-    if (selected == 0) {
-        color->reset();
-    } else if (selected <= PALETTE_COLOR_COUNT) {
-        *color = getPaletteColor(PALETTE_COLORS[selected - 1].palette);
+std::optional<uint32_t>& getColor(settings::appearance::AppearanceSettings& settings, size_t index) {
+    switch (index) {
+        case 0:
+            return settings.primaryColor;
+        case 1:
+            return settings.secondaryColor;
+        default:
+            return settings.errorColor;
     }
-    // Any other option is the custom colour from the settings file, which stays unchanged
-    updateWidgets(ctx);
+}
+
+uint32_t getDefaultColor(size_t index) {
+    LvglThemeSettings defaults;
+    lvgl_theme_get_default_settings(&defaults);
+    const lv_color_t colors[COLOR_COUNT] = { defaults.color_primary, defaults.color_secondary, defaults.color_error };
+    return lv_color_to_u32(colors[index]) & 0xFFFFFF;
+}
+
+void updateColorRow(Context* ctx, size_t index) {
+    const auto& widgets = ctx->colorRows[index];
+    const auto& color = getColor(ctx->pendingSettings, index);
+    lv_obj_set_style_bg_color(widgets.swatch, lv_color_hex(color.value_or(getDefaultColor(index))), LV_STATE_DEFAULT);
+}
+
+void onColorButtonPressed(lv_event_t* event) {
+    auto* ctx = static_cast<Context*>(lv_event_get_user_data(event));
+    auto* button = static_cast<lv_obj_t*>(lv_event_get_target(event));
+    ctx->selectColorIndex = reinterpret_cast<uintptr_t>(lv_obj_get_user_data(button));
+    task_event_group_signal(ctx->eventGroup, ctx->selectColorBit);
 }
 
 void onBackPressed(lv_event_t* event) {
@@ -373,29 +406,32 @@ lv_obj_t* createChip(lv_obj_t* parent, const char* text, lv_event_cb_t callback,
     return chip;
 }
 
-lv_obj_t* createColorRow(lv_obj_t* parent, const char* text, std::optional<uint32_t>* color, Context* ctx) {
-    auto* row = createLabeledRow(parent, text);
-    auto* dropdown = lv_dropdown_create(row);
+ColorRowWidgets createColorRow(lv_obj_t* parent, size_t index, Context* ctx) {
+    ColorRowWidgets widgets;
+    // "Title        [swatch] [Change]"
+    widgets.row = createLabeledRow(parent, COLOR_TITLES[index]);
 
-    std::string options = "Default";
-    uint32_t selected = 0;
-    for (size_t i = 0; i < PALETTE_COLOR_COUNT; i++) {
-        options += "\n";
-        options += PALETTE_COLORS[i].name;
-        if (color->has_value() && **color == getPaletteColor(PALETTE_COLORS[i].palette)) {
-            selected = i + 1;
-        }
-    }
-    // A colour that isn't in the palette was set in the settings file
-    if (color->has_value() && selected == 0) {
-        options += "\nCustom";
-        selected = PALETTE_COLOR_COUNT + 1;
-    }
-    lv_dropdown_set_options(dropdown, options.c_str());
-    lv_dropdown_set_selected(dropdown, selected);
-    lv_obj_set_user_data(dropdown, color);
-    lv_obj_add_event_cb(dropdown, onColorChanged, LV_EVENT_VALUE_CHANGED, ctx);
-    return row;
+    // The colour preview: its colour is the setting, its border uses the theme's text colour
+    widgets.swatch = lv_obj_create(widgets.row);
+    lv_obj_remove_style_all(widgets.swatch);
+    lv_obj_remove_flag(widgets.swatch, LV_OBJ_FLAG_SCROLLABLE);
+    lv_obj_remove_flag(widgets.swatch, LV_OBJ_FLAG_CLICKABLE);
+    lv_obj_set_style_bg_opa(widgets.swatch, LV_OPA_COVER, LV_STATE_DEFAULT);
+    lv_obj_set_style_border_width(widgets.swatch, 1, LV_STATE_DEFAULT);
+    lv_obj_set_style_border_color(widgets.swatch, lv_obj_get_style_text_color(widgets.swatch, LV_PART_MAIN), LV_STATE_DEFAULT);
+    lv_obj_set_style_radius(widgets.swatch, LV_DPX(4), LV_STATE_DEFAULT);
+
+    auto* button = lv_button_create(widgets.row);
+    auto* button_label = lv_label_create(button);
+    lv_label_set_text(button_label, "Change");
+    lv_obj_set_user_data(button, reinterpret_cast<void*>(static_cast<uintptr_t>(index)));
+    lv_obj_add_event_cb(button, onColorButtonPressed, LV_EVENT_SHORT_CLICKED, ctx);
+
+    // As high as the button
+    lv_obj_update_layout(button);
+    const int32_t swatch_size = lv_obj_get_height(button);
+    lv_obj_set_size(widgets.swatch, swatch_size, swatch_size);
+    return widgets;
 }
 
 void createThemeCard(lv_obj_t* parent, Context* ctx) {
@@ -418,9 +454,9 @@ void createThemeCard(lv_obj_t* parent, Context* ctx) {
     lv_obj_add_event_cb(animations_checkbox, onAnimationsChanged, LV_EVENT_VALUE_CHANGED, ctx);
 
     if (!ctx->isMonoDisplay) {
-        ctx->colorRows[0] = createColorRow(card, "Primary color", &ctx->pendingSettings.primaryColor, ctx);
-        ctx->colorRows[1] = createColorRow(card, "Secondary color", &ctx->pendingSettings.secondaryColor, ctx);
-        ctx->colorRows[2] = createColorRow(card, "Error color", &ctx->pendingSettings.errorColor, ctx);
+        for (size_t i = 0; i < COLOR_COUNT; i++) {
+            ctx->colorRows[i] = createColorRow(card, i, ctx);
+        }
     }
 }
 
@@ -521,8 +557,8 @@ void destroyWidgets(void* userData) {
     ctx->darkChip = nullptr;
     ctx->regularThemeChip = nullptr;
     ctx->monoThemeChip = nullptr;
-    for (auto*& row : ctx->colorRows) {
-        row = nullptr;
+    for (auto& row : ctx->colorRows) {
+        row = {};
     }
 }
 
@@ -631,6 +667,37 @@ void startFileSelection(Context* ctx, FontSlot slot) {
     ctx->selectLaunchId = fileselection::startForExistingFile(ctx->appInstanceId, ctx->selectStream, ctx->selectBuffer, sizeof(ctx->selectBuffer), ctx->eventGroup);
 }
 
+void startColorSelection(Context* ctx) {
+    if (ctx->colorSelectLaunchId != 0 || ctx->applying) {
+        return;
+    }
+    std::vector<std::string> items;
+    items.reserve(PALETTE_COLOR_COUNT + 1);
+    items.emplace_back("Default");
+    for (const auto& named_color : PALETTE_COLORS) {
+        items.emplace_back(named_color.name);
+    }
+    ctx->colorSelectLaunchId = selectiondialog::start(ctx->appInstanceId, COLOR_TITLES[ctx->selectColorIndex], items);
+}
+
+void onColorSelectionResult(Context* ctx, const AppEvent& event) {
+    ctx->colorSelectLaunchId = 0;
+    // Index 0 is "Default", the others are the palette colours. Other results mean that the dialog was dismissed.
+    const int32_t selected = event.result.result;
+    if (selected >= 0 && selected <= static_cast<int32_t>(PALETTE_COLOR_COUNT)) {
+        lvgl_lock();
+        auto& color = getColor(ctx->pendingSettings, ctx->selectColorIndex);
+        if (selected == 0) {
+            color.reset();
+        } else {
+            color = getPaletteColor(PALETTE_COLORS[selected - 1].palette);
+        }
+        updateWidgets(ctx);
+        lvgl_unlock();
+    }
+    app_manager_stop(event.result.launch_id);
+}
+
 void onFileSelectionResult(Context* ctx, const AppEvent& event) {
     ctx->selectLaunchId = 0;
     if (event.result.result == 0 /* Ok */) {
@@ -665,6 +732,7 @@ int32_t appMain(int argc, char* argv[]) {
     ctx.eventGroup = &event_group;
     check(task_event_group_claim_bit(&event_group, &ctx.selectRegularBit) == ERROR_NONE);
     check(task_event_group_claim_bit(&event_group, &ctx.selectMonoBit) == ERROR_NONE);
+    check(task_event_group_claim_bit(&event_group, &ctx.selectColorBit) == ERROR_NONE);
     check(task_event_group_claim_bit(&event_group, &ctx.applyBit) == ERROR_NONE);
     check(task_event_group_claim_bit(&event_group, &ctx.cacheUpdatedBit) == ERROR_NONE);
 
@@ -684,6 +752,9 @@ int32_t appMain(int argc, char* argv[]) {
         if (flags & ctx.selectMonoBit) {
             startFileSelection(&ctx, FontSlot::Mono);
         }
+        if (flags & ctx.selectColorBit) {
+            startColorSelection(&ctx);
+        }
         if (flags & ctx.applyBit) {
             startApply(&ctx);
         }
@@ -697,6 +768,8 @@ int32_t appMain(int argc, char* argv[]) {
                 should_close = true;
             } else if (event.type == APP_EVENT_RESULT && event.result.launch_id == ctx.selectLaunchId) {
                 onFileSelectionResult(&ctx, event);
+            } else if (event.type == APP_EVENT_RESULT && event.result.launch_id == ctx.colorSelectLaunchId) {
+                onColorSelectionResult(&ctx, event);
             }
         }
     }

Tactility/Source/app/launcher/Launcher.cpp

@@ -9,7 +9,9 @@
 #include <lvgl.h>
 #include <lvgl/icons/launcher.h>
 #include <lvgl/fonts.h>
+#include <lvgl/grid_navigation.h>
 #include <lvgl/lvgl.h>
+#include <lvgl/theme.h>
 #include <lvgl/widgets/icon_button.h>
 
 #include <lvgl_window_manager/window_manager.h>
@@ -151,10 +153,14 @@ void createWidgets(lv_obj_t* parent, void*) {
     }
 
     // The app list is the main action, so it stands out more than the others
-    auto* app_list_button = createAppButton(buttons_wrapper, LVGL_ICON_BUTTON_FILLED, LVGL_ICON_LAUNCHER_APPS, "tactility.applist");
-    createAppButton(buttons_wrapper, LVGL_ICON_BUTTON_FILLED, LVGL_ICON_LAUNCHER_FOLDER, "tactility.files");
-    createAppButton(buttons_wrapper, LVGL_ICON_BUTTON_FILLED, LVGL_ICON_LAUNCHER_SETTINGS, "tactility.settings");
+    // Filled buttons would be solid black blocks with the monochrome theme
+    const auto variant = lvgl_theme_is_mono() ? LVGL_ICON_BUTTON_STANDARD : LVGL_ICON_BUTTON_FILLED;
+    auto* app_list_button = createAppButton(buttons_wrapper, variant, LVGL_ICON_LAUNCHER_APPS, "tactility.applist");
+    createAppButton(buttons_wrapper, variant, LVGL_ICON_LAUNCHER_FOLDER, "tactility.files");
+    createAppButton(buttons_wrapper, variant, LVGL_ICON_LAUNCHER_SETTINGS, "tactility.settings");
     applyButtonMargins(buttons_wrapper, is_landscape_display);
+    // The arrow keys move between the buttons, in a row or a column
+    lvgl_grid_navigation_add(buttons_wrapper);
 
     // The launcher's container is several levels below the screen, and LVGL only sends
     // LV_EVENT_SIZE_CHANGED to the screen object itself on a resolution change - so the
@@ -179,8 +185,8 @@ void createWidgets(lv_obj_t* parent, void*) {
     // an extra time.
     if (!device_has_active_by_type(&POINTER_TYPE)) {
         // lv_obj_update_layout(parent); // Resolve flex layout first, so focus/state invalidate against final coords
-        lv_group_focus_obj(app_list_button);
-        lv_obj_add_state(app_list_button, LV_STATE_FOCUS_KEY);
+        lv_group_focus_obj(buttons_wrapper);
+        lv_gridnav_set_focused(buttons_wrapper, app_list_button, LV_ANIM_OFF);
     }
 }
 

Tactility/Source/app/selectiondialog/SelectionDialog.cpp

@@ -32,7 +32,7 @@ struct Context {
     // The eventual appMain() return value - see AlertDialog.cpp's Context::result for why this
     // is a plain (non-atomic) field safely shared between the LVGL thread (writer, before
     // emitting APP_EVENT_CLOSE) and this dialog's own thread (reader, after waking from it).
-    int32_t result = 1; // Cancelled - safety-net default if closed without selecting an item
+    int32_t result = -2; // Cancelled - safety-net default if closed without selecting an item
 };
 
 struct ItemContext {

Tactility/Source/settings/AppearanceSettings.cpp

@@ -30,11 +30,25 @@ static std::optional<uint32_t> parseColor(const std::map<std::string, std::strin
     return static_cast<uint32_t>(std::strtoul(entry->second.c_str(), nullptr, 16)) & 0xFFFFFF;
 }
 
+// Saving only updates the keys that are written, so an unset colour is written as an empty value
 static void putColor(std::map<std::string, std::string>& map, const char* key, std::optional<uint32_t> color) {
     if (color.has_value()) {
         char text[8];
         std::snprintf(text, sizeof(text), "%06" PRIX32, *color);
         map[key] = text;
+    } else {
+        map[key] = "";
+    }
+}
+
+static const char* toString(ThemeMode mode) {
+    switch (mode) {
+        case ThemeMode::Light:
+            return "light";
+        case ThemeMode::Dark:
+            return "dark";
+        default:
+            return "default";
     }
 }
 
@@ -103,9 +117,7 @@ bool save(const AppearanceSettings& settings) {
     map[SETTINGS_KEY_FONT_SIZE] = std::to_string(settings.fontSize);
     map[SETTINGS_KEY_REGULAR_FONT_PATH] = settings.regularFontPath;
     map[SETTINGS_KEY_MONO_FONT_PATH] = settings.monoFontPath;
-    if (settings.themeMode != ThemeMode::DeviceDefault) {
-        map[SETTINGS_KEY_THEME_MODE] = settings.themeMode == ThemeMode::Dark ? "dark" : "light";
-    }
+    map[SETTINGS_KEY_THEME_MODE] = toString(settings.themeMode);
     map[SETTINGS_KEY_MONO_THEME] = settings.monoTheme ? "true" : "false";
     map[SETTINGS_KEY_ANIMATIONS] = settings.animationsEnabled ? "true" : "false";
     putColor(map, SETTINGS_KEY_PRIMARY_COLOR, settings.primaryColor);

TactilityKernel/include/tactility/drivers/keyboard.h

@@ -30,6 +30,10 @@ typedef enum {
     CODEPOINT_ARROW_DOWN  = 0x2193,
     CODEPOINT_HOME        = 0x21F1,
     CODEPOINT_END         = 0x21F2,
+    /** Moves the focus to the next widget, for devices that can only step through widgets (e.g. an encoder wheel) */
+    CODEPOINT_FOCUS_NEXT     = 0x21E5,
+    /** Moves the focus to the previous widget, for devices that can only step through widgets (e.g. an encoder wheel) */
+    CODEPOINT_FOCUS_PREVIOUS = 0x21E4,
 } CodePoint;
 
 /**

device.py

@@ -292,20 +292,13 @@ def write_lvgl_variables(output_file, device_properties: dict):
     has_statusbar_colors_inverted = get_boolean_property_or_false(device_properties, "lvgl.statusbarColorsInverted")
     if has_statusbar_colors_inverted:
         output_file.write("CONFIG_TT_LVGL_STATUSBAR_COLORS_INVERTED=y\n")
+    # Tactility uses its own themes (Modules/lvgl-module), and lvgl.theme only selects the default light or dark mode
     theme = get_property_or_default(device_properties, "lvgl.theme", "DefaultDark")
-    if theme == "DefaultDark":
-        output_file.write("CONFIG_LV_THEME_DEFAULT_DARK=y\n")
-    elif theme == "DefaultLight":
-        output_file.write("CONFIG_LV_THEME_DEFAULT_LIGHT=y\n")
-    elif theme == "Mono":
-        output_file.write("CONFIG_LV_USE_THEME_MONO=y\n")
-        # LVGL selects the theme with #if LV_USE_THEME_DEFAULT / #elif LV_USE_THEME_SIMPLE /
-        # #elif LV_USE_THEME_MONO, and the Kconfig defaults enable DEFAULT+SIMPLE for any
-        # non-1bpp color depth so MONO only takes effect once those are disabled.
-        output_file.write("CONFIG_LV_USE_THEME_DEFAULT=n\n")
-        output_file.write("CONFIG_LV_USE_THEME_SIMPLE=n\n")
-    else:
+    if theme not in ("DefaultDark", "DefaultLight", "Mono"):
         exit_with_error(f"Unknown theme: {theme}")
+    output_file.write("CONFIG_LV_USE_THEME_DEFAULT=n\n")
+    output_file.write("CONFIG_LV_USE_THEME_SIMPLE=n\n")
+    output_file.write("CONFIG_LV_USE_THEME_MONO=n\n")
     font_size_text = get_property_or_none(device_properties, "font.defaultSize")
     if font_size_text is None:
         font_size_text = get_property_or_default(device_properties, "lvgl.fontSize", "14")

lv_conf.h

@@ -557,22 +557,13 @@
  * THEMES
  *==================*/
 
+/*Tactility uses its own themes (Modules/lvgl-module), so LVGL's themes are disabled*/
+
 /*A simple, impressive and very complete theme*/
-#define LV_USE_THEME_DEFAULT 1
-#if LV_USE_THEME_DEFAULT
-
-    /*0: Light mode; 1: Dark mode*/
-    #define LV_THEME_DEFAULT_DARK 1
-
-    /*1: Enable grow on press*/
-    #define LV_THEME_DEFAULT_GROW 1
-
-    /*Default transition time in [ms]*/
-    #define LV_THEME_DEFAULT_TRANSITION_TIME 80
-#endif /*LV_USE_THEME_DEFAULT*/
+#define LV_USE_THEME_DEFAULT 0
 
 /*A very simple theme that is a good starting point for a custom theme*/
-#define LV_USE_THEME_SIMPLE 1
+#define LV_USE_THEME_SIMPLE 0
 
 /*A theme designed for monochrome displays*/
 #define LV_USE_THEME_MONO 0
@@ -782,7 +773,7 @@
 #define LV_USE_MONKEY 0
 
 /*1: Enable grid navigation*/
-#define LV_USE_GRIDNAV 0
+#define LV_USE_GRIDNAV 1
 
 /*1: Enable lv_obj fragment*/
 #define LV_USE_FRAGMENT 0