From d9dcdc5815ff079e662c23c8a27b11de7632c7b0 Mon Sep 17 00:00:00 2001
From: Simon Gardling <titaniumtown@gmail.com>
Date: Tue, 8 Mar 2022 12:36:23 -0500
Subject: [PATCH] update Help window

---
 src/egui_app.rs | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/egui_app.rs b/src/egui_app.rs
index e85bffc..92c27d0 100644
--- a/src/egui_app.rs
+++ b/src/egui_app.rs
@@ -63,6 +63,9 @@ const HELP_EXPR: &str = "- sqrt(x): square root of x
 - atan2, sinh, cosh, tanh, asinh, acosh, atanh
 - floor, ceil, round, signum";
 
+const HELP_VARS: &str = "- Euler's number is supported via 'E' (noted it being uppercase)
+- PI is available through 'pi' or 'π'";
+
 // Used in the "Panel" section of the Help window
 const HELP_PANEL: &str =
 "- The 'Panel' button on the top bar toggles if the side bar should be shown or not.
@@ -414,6 +417,10 @@ impl epi::App for MathApp {
                     ui.label(HELP_EXPR);
                 });
 
+                ui.collapsing("Supported Constants", |ui| {
+                    ui.label(HELP_VARS);
+                });
+
                 ui.collapsing("Panel", |ui| {
                     ui.label(HELP_PANEL);
                 });