[lvgl] Final stage (#7184)

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

esphome/components/lvgl/light/__init__.py

@@ -0,0 +1,32 @@
+import esphome.codegen as cg
+from esphome.components import light
+from esphome.components.light import LightOutput
+import esphome.config_validation as cv
+from esphome.const import CONF_GAMMA_CORRECT, CONF_LED, CONF_OUTPUT_ID
+
+from ..defines import CONF_LVGL_ID
+from ..lvcode import LvContext
+from ..schemas import LVGL_SCHEMA
+from ..types import LvType, lvgl_ns
+from ..widgets import get_widgets
+
+lv_led_t = LvType("lv_led_t")
+LVLight = lvgl_ns.class_("LVLight", LightOutput)
+CONFIG_SCHEMA = light.RGB_LIGHT_SCHEMA.extend(
+    {
+        cv.Optional(CONF_GAMMA_CORRECT, default=0.0): cv.positive_float,
+        cv.Required(CONF_LED): cv.use_id(lv_led_t),
+        cv.GenerateID(CONF_OUTPUT_ID): cv.declare_id(LVLight),
+    }
+).extend(LVGL_SCHEMA)
+
+
+async def to_code(config):
+    var = cg.new_Pvariable(config[CONF_OUTPUT_ID])
+    await light.register_light(var, config)
+
+    paren = await cg.get_variable(config[CONF_LVGL_ID])
+    widget = await get_widgets(config, CONF_LED)
+    widget = widget[0]
+    async with LvContext(paren) as ctx:
+        ctx.add(var.set_obj(widget.obj))

esphome/components/lvgl/light/lvgl_light.h

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+#pragma once
+
+#include "esphome/core/component.h"
+#include "esphome/components/light/light_output.h"
+#include "../lvgl_esphome.h"
+
+namespace esphome {
+namespace lvgl {
+
+class LVLight : public light::LightOutput {
+ public:
+  light::LightTraits get_traits() override {
+    auto traits = light::LightTraits();
+    traits.set_supported_color_modes({light::ColorMode::RGB});
+    return traits;
+  }
+  void write_state(light::LightState *state) override {
+    float red, green, blue;
+    state->current_values_as_rgb(&red, &green, &blue, false);
+    auto color = lv_color_make(red * 255, green * 255, blue * 255);
+    if (this->obj_ != nullptr) {
+      this->set_value_(color);
+    } else {
+      this->initial_value_ = color;
+    }
+  }
+
+  void set_obj(lv_obj_t *obj) {
+    this->obj_ = obj;
+    if (this->initial_value_) {
+      lv_led_set_color(obj, this->initial_value_.value());
+      lv_led_on(obj);
+      this->initial_value_.reset();
+    }
+  }
+
+ protected:
+  void set_value_(lv_color_t value) {
+    lv_led_set_color(this->obj_, value);
+    lv_led_on(this->obj_);
+    lv_event_send(this->obj_, lv_custom_event, nullptr);
+  }
+  lv_obj_t *obj_{};
+  optional<lv_color_t> initial_value_{};
+};
+
+}  // namespace lvgl
+}  // namespace esphome