From 6f19808effd1509157bf17c06051e1cbae0c0f54 Mon Sep 17 00:00:00 2001
From: Peter Zich <petezich@gmail.com>
Date: Sat, 12 Jul 2025 22:43:32 -0700
Subject: [PATCH] [lvgl] Post-process size arguments in meter config (#9466)

Co-authored-by: clydebarrow <2366188+clydebarrow@users.noreply.github.com>
---
 esphome/components/lvgl/widgets/meter.py | 33 ++++++++++++++----------
 tests/components/lvgl/lvgl-package.yaml  | 10 +++----
 2 files changed, 25 insertions(+), 18 deletions(-)

diff --git a/esphome/components/lvgl/widgets/meter.py b/esphome/components/lvgl/widgets/meter.py
index 840511da69..f836a1eca5 100644
--- a/esphome/components/lvgl/widgets/meter.py
+++ b/esphome/components/lvgl/widgets/meter.py
@@ -29,9 +29,9 @@ from ..defines import (
 )
 from ..helpers import add_lv_use, lvgl_components_required
 from ..lv_validation import (
-    angle,
     get_end_value,
     get_start_value,
+    lv_angle,
     lv_bool,
     lv_color,
     lv_float,
@@ -162,7 +162,7 @@ SCALE_SCHEMA = cv.Schema(
         cv.Optional(CONF_RANGE_FROM, default=0.0): cv.float_,
         cv.Optional(CONF_RANGE_TO, default=100.0): cv.float_,
         cv.Optional(CONF_ANGLE_RANGE, default=270): cv.int_range(0, 360),
-        cv.Optional(CONF_ROTATION): angle,
+        cv.Optional(CONF_ROTATION): lv_angle,
         cv.Optional(CONF_INDICATORS): cv.ensure_list(INDICATOR_SCHEMA),
     }
 )
@@ -187,7 +187,7 @@ class MeterType(WidgetType):
         for scale_conf in config.get(CONF_SCALES, ()):
             rotation = 90 + (360 - scale_conf[CONF_ANGLE_RANGE]) / 2
             if CONF_ROTATION in scale_conf:
-                rotation = scale_conf[CONF_ROTATION] // 10
+                rotation = await lv_angle.process(scale_conf[CONF_ROTATION])
             with LocalVariable(
                 "meter_var", "lv_meter_scale_t", lv_expr.meter_add_scale(var)
             ) as meter_var:
@@ -205,21 +205,20 @@ class MeterType(WidgetType):
                         var,
                         meter_var,
                         ticks[CONF_COUNT],
-                        ticks[CONF_WIDTH],
-                        ticks[CONF_LENGTH],
+                        await size.process(ticks[CONF_WIDTH]),
+                        await size.process(ticks[CONF_LENGTH]),
                         color,
                     )
                     if CONF_MAJOR in ticks:
                         major = ticks[CONF_MAJOR]
-                        color = await lv_color.process(major[CONF_COLOR])
                         lv.meter_set_scale_major_ticks(
                             var,
                             meter_var,
                             major[CONF_STRIDE],
-                            major[CONF_WIDTH],
-                            major[CONF_LENGTH],
-                            color,
-                            major[CONF_LABEL_GAP],
+                            await size.process(major[CONF_WIDTH]),
+                            await size.process(major[CONF_LENGTH]),
+                            await lv_color.process(major[CONF_COLOR]),
+                            await size.process(major[CONF_LABEL_GAP]),
                         )
                 for indicator in scale_conf.get(CONF_INDICATORS, ()):
                     (t, v) = next(iter(indicator.items()))
@@ -233,7 +232,11 @@ class MeterType(WidgetType):
                         lv_assign(
                             ivar,
                             lv_expr.meter_add_needle_line(
-                                var, meter_var, v[CONF_WIDTH], color, v[CONF_R_MOD]
+                                var,
+                                meter_var,
+                                await size.process(v[CONF_WIDTH]),
+                                color,
+                                await size.process(v[CONF_R_MOD]),
                             ),
                         )
                     if t == CONF_ARC:
@@ -241,7 +244,11 @@ class MeterType(WidgetType):
                         lv_assign(
                             ivar,
                             lv_expr.meter_add_arc(
-                                var, meter_var, v[CONF_WIDTH], color, v[CONF_R_MOD]
+                                var,
+                                meter_var,
+                                await size.process(v[CONF_WIDTH]),
+                                color,
+                                await size.process(v[CONF_R_MOD]),
                             ),
                         )
                     if t == CONF_TICK_STYLE:
@@ -257,7 +264,7 @@ class MeterType(WidgetType):
                                 color_start,
                                 color_end,
                                 v[CONF_LOCAL],
-                                v[CONF_WIDTH],
+                                size.process(v[CONF_WIDTH]),
                             ),
                         )
                     if t == CONF_IMAGE:
diff --git a/tests/components/lvgl/lvgl-package.yaml b/tests/components/lvgl/lvgl-package.yaml
index 2edc62b6a1..fbcd2a3fba 100644
--- a/tests/components/lvgl/lvgl-package.yaml
+++ b/tests/components/lvgl/lvgl-package.yaml
@@ -919,21 +919,21 @@ lvgl:
                       text_color: 0xFFFFFF
                       scales:
                         - ticks:
-                            width: 1
+                            width: !lambda return 1;
                             count: 61
-                            length: 20
+                            length: 20%
                             color: 0xFFFFFF
                           range_from: 0
                           range_to: 60
                           angle_range: 360
-                          rotation: 270
+                          rotation: !lambda return 2700;
                           indicators:
                             - line:
                                 opa: 50%
                                 id: minute_hand
                                 color: 0xFF0000
-                                r_mod: -1
-                                width: 3
+                                r_mod: !lambda return -1;
+                                width: !lambda return 3;
                         -
                           angle_range: 330
                           rotation: 300