step 6: add animation and high rate update stress tests

src/dpg_gauges/state.py

@@ -3,6 +3,7 @@
 from __future__ import annotations
 
 import math
+import time
 from dataclasses import dataclass, field, replace
 from enum import IntFlag, auto
 from typing import Any
@@ -144,6 +145,13 @@ def animation_config(config: GaugeConfig) -> AnimationConfig | None:
     return animation
 
 
+def smoothing_config(config: GaugeConfig) -> SmoothingConfig | None:
+    smoothing = config.smoothing
+    if isinstance(smoothing, bool):
+        return SmoothingConfig(enabled=smoothing)
+    return smoothing
+
+
 def clamp_runtime_value(value: GaugeValue, config: GaugeConfig) -> tuple[float | None, bool]:
     numeric = coerce_numeric_value(value)
     if numeric is None:
@@ -203,8 +211,9 @@ def get_gauge_state(tag: Tag) -> GaugeState:
         raise GaugeNotFoundError(msg) from exc
 
 
-def set_runtime_value(tag: Tag, value: GaugeValue, *, now: float = 0.0) -> None:
+def set_runtime_value(tag: Tag, value: GaugeValue, *, now: float | None = None) -> None:
     state = get_gauge_state(tag)
+    now = time.monotonic() if now is None else now
     clamped, invalid = clamp_runtime_value(value, state.config)
     state.target_value = value
     state.clamped_value = clamped
@@ -215,8 +224,15 @@ def set_runtime_value(tag: Tag, value: GaugeValue, *, now: float = 0.0) -> None:
         state.displayed_value, clamped, animation_config(state.config), now
     )
     if not state.animation_state.active:
-        state.displayed_value = clamped
-        state.smoothing_state.value = clamped
+        smoothing = smoothing_config(state.config)
+        if smoothing is not None and smoothing.enabled and clamped is not None and not invalid:
+            if state.smoothing_state.value is None:
+                state.smoothing_state.value = state.previous_displayed_value
+            state.smoothing_state.active = state.smoothing_state.value != clamped
+        else:
+            state.displayed_value = clamped
+            state.smoothing_state.value = clamped
+            state.smoothing_state.active = False
     state.dirty |= DirtyFlags.VALUE | DirtyFlags.DYNAMIC | DirtyFlags.TEXT
     render_runtime_gauge(state)