From 3f3e6ff1fb40c4166c5d4e54f74ab475a919536a Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Jean-Micha=C3=ABl=20Celerier?=
 <jeanmichael.celerier@gmail.com>
Date: Mon, 9 Dec 2024 15:05:21 -0500
Subject: [PATCH] concepts: play with a visual range concept separate from the
 mapping range

---
 examples/Advanced/Utilities/Gain.hpp |  9 ++++++++-
 include/avnd/concepts/range.hpp      |  4 ++++
 include/avnd/introspection/range.hpp | 26 ++++++++++++++++++++++++++
 3 files changed, 38 insertions(+), 1 deletion(-)

diff --git a/examples/Advanced/Utilities/Gain.hpp b/examples/Advanced/Utilities/Gain.hpp
index 84bd2be4..19287c23 100644
--- a/examples/Advanced/Utilities/Gain.hpp
+++ b/examples/Advanced/Utilities/Gain.hpp
@@ -22,7 +22,14 @@ class Gain
 
   struct inputs
   {
-    halp::smooth_knob<"Gain", halp::range{0., 5., 0.}> gain;
+    struct : halp::smooth_knob<"Gain", halp::range{0., 1., 0.}>
+    {
+      struct visual_range
+      {
+        double min = 0.;
+        double max = 5.;
+      };
+    } gain;
   };
   double operator()(double input, const inputs& in) { return input * in.gain; }
 };
diff --git a/include/avnd/concepts/range.hpp b/include/avnd/concepts/range.hpp
index 05bf9b73..2c22f223 100644
--- a/include/avnd/concepts/range.hpp
+++ b/include/avnd/concepts/range.hpp
@@ -11,4 +11,8 @@ namespace avnd
 template <typename C>
 concept has_range = requires { C::range(); } || requires { sizeof(C::range); }
                     || requires { sizeof(typename C::range); };
+template <typename C>
+concept has_visual_range = requires { C::visual_range(); } || requires {
+  sizeof(C::visual_range);
+} || requires { sizeof(typename C::visual_range); };
 }
diff --git a/include/avnd/introspection/range.hpp b/include/avnd/introspection/range.hpp
index cc8f513a..f8af180d 100644
--- a/include/avnd/introspection/range.hpp
+++ b/include/avnd/introspection/range.hpp
@@ -26,4 +26,30 @@ consteval auto get_range(const T&)
 {
   return get_range<T>();
 }
+
+template <avnd::has_visual_range T>
+consteval auto get_visual_range()
+{
+  if constexpr(requires { sizeof(typename T::visual_range); })
+    return typename T::visual_range{};
+  else if constexpr(requires { T::visual_range(); })
+    return T::visual_range();
+  else if constexpr(requires { sizeof(decltype(T::visual_range)); })
+    return T::visual_range;
+  else
+    return get_range<T>();
+}
+
+template <avnd::has_range T>
+  requires(!avnd::has_visual_range<T>)
+consteval auto get_visual_range()
+{
+  return get_range<T>();
+}
+
+template <typename T>
+consteval auto get_visual_range(const T&)
+{
+  return get_visual_range<T>();
+}
 }