[lvgl] Implement default group for encoders (#7242)

Co-authored-by: clydeps <U5yx99dok9>

esphome/components/lvgl/__init__.py

@@ -47,6 +47,7 @@ from .types import (
     IdleTrigger,
     ObjUpdateAction,
     lv_font_t,
+    lv_group_t,
     lv_style_t,
     lvgl_ns,
 )
@@ -335,8 +336,9 @@ CONFIG_SCHEMA = (
             cv.Optional(df.CONF_THEME): cv.Schema(
                 {cv.Optional(name): obj_schema(w) for name, w in WIDGET_TYPES.items()}
             ),
-            cv.GenerateID(df.CONF_TOUCHSCREENS): touchscreen_schema,
-            cv.GenerateID(df.CONF_ENCODERS): ENCODERS_CONFIG,
+            cv.Optional(df.CONF_TOUCHSCREENS, default=None): touchscreen_schema,
+            cv.Optional(df.CONF_ENCODERS, default=None): ENCODERS_CONFIG,
+            cv.GenerateID(df.CONF_DEFAULT_GROUP): cv.declare_id(lv_group_t),
         }
     )
     .extend(DISP_BG_SCHEMA)

esphome/components/lvgl/defines.py

@@ -386,6 +386,7 @@ CONF_COLOR_DEPTH = "color_depth"
 CONF_CONTROL = "control"
 CONF_DEFAULT = "default"
 CONF_DEFAULT_FONT = "default_font"
+CONF_DEFAULT_GROUP = "default_group"
 CONF_DIR = "dir"
 CONF_DISPLAYS = "displays"
 CONF_ENCODERS = "encoders"

esphome/components/lvgl/encoders.py

@@ -5,6 +5,7 @@ import esphome.config_validation as cv
 from esphome.const import CONF_GROUP, CONF_ID, CONF_SENSOR
 
 from .defines import (
+    CONF_DEFAULT_GROUP,
     CONF_ENCODERS,
     CONF_ENTER_BUTTON,
     CONF_LEFT_BUTTON,
@@ -38,7 +39,10 @@ ENCODERS_CONFIG = cv.ensure_list(
 
 
 async def encoders_to_code(var, config):
-    for enc_conf in config.get(CONF_ENCODERS, ()):
+    default_group = lv_Pvariable(lv_group_t, config[CONF_DEFAULT_GROUP])
+    lv_assign(default_group, lv_expr.group_create())
+    lv.group_set_default(default_group)
+    for enc_conf in config[CONF_ENCODERS]:
         lvgl_components_required.add("KEY_LISTENER")
         lpt = enc_conf[CONF_LONG_PRESS_TIME].total_milliseconds
         lprt = enc_conf[CONF_LONG_PRESS_REPEAT_TIME].total_milliseconds
@@ -60,6 +64,6 @@ async def encoders_to_code(var, config):
         if group := enc_conf.get(CONF_GROUP):
             group = lv_Pvariable(lv_group_t, group)
             lv_assign(group, lv_expr.group_create())
-            lv.indev_set_group(lv_expr.indev_drv_register(listener.get_drv()), group)
         else:
-            lv.indev_drv_register(listener.get_drv())
+            group = default_group
+        lv.indev_set_group(lv_expr.indev_drv_register(listener.get_drv()), group)

esphome/components/lvgl/touchscreens.py

@@ -34,7 +34,7 @@ def touchscreen_schema(config):
 
 
 async def touchscreens_to_code(var, config):
-    for tconf in config.get(CONF_TOUCHSCREENS, ()):
+    for tconf in config[CONF_TOUCHSCREENS]:
         lvgl_components_required.add(CONF_TOUCHSCREEN)
         touchscreen = await cg.get_variable(tconf[CONF_TOUCHSCREEN_ID])
         lpt = tconf[CONF_LONG_PRESS_TIME].total_milliseconds