[lvgl] Final stage (#7184)

Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>

esphome/components/lvgl/widgets/dropdown.py

@@ -0,0 +1,76 @@
+import esphome.codegen as cg
+import esphome.config_validation as cv
+from esphome.const import CONF_OPTIONS
+
+from ..defines import (
+    CONF_DIR,
+    CONF_INDICATOR,
+    CONF_MAIN,
+    CONF_SELECTED_INDEX,
+    CONF_SYMBOL,
+    DIRECTIONS,
+    literal,
+)
+from ..lv_validation import lv_int, lv_text, option_string
+from ..lvcode import LocalVariable, lv, lv_expr
+from ..schemas import part_schema
+from ..types import LvSelect, LvType, lv_obj_t
+from . import Widget, WidgetType, set_obj_properties
+from .label import CONF_LABEL
+
+CONF_DROPDOWN = "dropdown"
+CONF_DROPDOWN_LIST = "dropdown_list"
+
+lv_dropdown_t = LvSelect("lv_dropdown_t")
+lv_dropdown_list_t = LvType("lv_dropdown_list_t")
+dropdown_list_spec = WidgetType(CONF_DROPDOWN_LIST, lv_dropdown_list_t, (CONF_MAIN,))
+
+DROPDOWN_BASE_SCHEMA = cv.Schema(
+    {
+        cv.Optional(CONF_SYMBOL): lv_text,
+        cv.Optional(CONF_SELECTED_INDEX): cv.templatable(cv.int_),
+        cv.Optional(CONF_DIR, default="BOTTOM"): DIRECTIONS.one_of,
+        cv.Optional(CONF_DROPDOWN_LIST): part_schema(dropdown_list_spec),
+    }
+)
+
+DROPDOWN_SCHEMA = DROPDOWN_BASE_SCHEMA.extend(
+    {
+        cv.Required(CONF_OPTIONS): cv.ensure_list(option_string),
+    }
+)
+
+
+class DropdownType(WidgetType):
+    def __init__(self):
+        super().__init__(
+            CONF_DROPDOWN,
+            lv_dropdown_t,
+            (CONF_MAIN, CONF_INDICATOR),
+            DROPDOWN_SCHEMA,
+            DROPDOWN_BASE_SCHEMA,
+        )
+
+    async def to_code(self, w: Widget, config):
+        if options := config.get(CONF_OPTIONS):
+            text = cg.safe_exp("\n".join(options))
+            lv.dropdown_set_options(w.obj, text)
+        if symbol := config.get(CONF_SYMBOL):
+            lv.dropdown_set_symbol(w.obj, await lv_text.process(symbol))
+        if (selected := config.get(CONF_SELECTED_INDEX)) is not None:
+            value = await lv_int.process(selected)
+            lv.dropdown_set_selected(w.obj, value)
+        if dirn := config.get(CONF_DIR):
+            lv.dropdown_set_dir(w.obj, literal(dirn))
+        if dlist := config.get(CONF_DROPDOWN_LIST):
+            with LocalVariable(
+                "dropdown_list", lv_obj_t, lv_expr.dropdown_get_list(w.obj)
+            ) as dlist_obj:
+                dwid = Widget(dlist_obj, dropdown_list_spec, dlist)
+                await set_obj_properties(dwid, dlist)
+
+    def get_uses(self):
+        return (CONF_LABEL,)
+
+
+dropdown_spec = DropdownType()