From 335079ac1459bb03b8ed491f1f8573a12222a1c1 Mon Sep 17 00:00:00 2001
From: Austen Adler <agadler@austenadler.com>
Date: Mon, 18 Sep 2023 22:21:50 -0400
Subject: [PATCH] Add enabled field for buttons

---
 rpn_rs_gui/src/app.rs | 101 +++++++++++++++++++++++-------------------
 1 file changed, 55 insertions(+), 46 deletions(-)

diff --git a/rpn_rs_gui/src/app.rs b/rpn_rs_gui/src/app.rs
index 90fbdee..1eb2644 100644
--- a/rpn_rs_gui/src/app.rs
+++ b/rpn_rs_gui/src/app.rs
@@ -1,4 +1,6 @@
-use egui::{Button, Color32, FontId, Frame, Grid, Key, Label, RichText, Rounding, Stroke, Vec2, Style};
+use egui::{
+    Button, Color32, FontId, Frame, Grid, Key, Label, RichText, Rounding, Stroke, Style, Vec2,
+};
 use rpn_rs::calc::{errors::CalculatorError, Calculator};
 use tracing::{error, info};
 
@@ -132,8 +134,8 @@ impl eframe::App for TemplateApp {
     fn update(&mut self, ctx: &egui::Context, _frame: &mut eframe::Frame) {
         let Self { .. } = self;
 
-    let mut style: Style = (*ctx.style()).clone();
-    style.spacing.button_padding = BUTTON_PADDING;
+        let mut style: Style = (*ctx.style()).clone();
+        style.spacing.button_padding = BUTTON_PADDING;
         ctx.set_style(style);
 
         // #[cfg(not(target_arch = "wasm32"))]
@@ -166,13 +168,15 @@ impl eframe::App for TemplateApp {
                                     .font(DEFAULT_FONT)
                                     .color(Color32::WHITE);
                                 if ui
-                                    .add(
+                                    .add_enabled(
+                                        button.enabled,
                                         Button::new(label)
                                             // .frame(false)
                                             .stroke(Stroke::NONE)
                                             .rounding(Rounding::none())
                                             .fill(Color32::from_gray(0x12)),
                                     )
+                                    .on_hover_text(button.help)
                                     .clicked()
                                 {
                                     info!("Clicked button {}", button.value);
@@ -248,69 +252,74 @@ impl eframe::App for TemplateApp {
 struct CalculatorButton {
     value: char,
     help: &'static str,
+    enabled: bool,
 }
 
 impl CalculatorButton {
-    const fn new(value: char, help: &'static str) -> Self {
-        Self { value, help }
+    const fn new(value: char, help: &'static str, enabled: bool) -> Self {
+        Self {
+            value,
+            help,
+            enabled,
+        }
     }
 }
 
 const BUTTON_LAYOUT: &[&[CalculatorButton]] = &[
     &[
-        // CalculatorButton::new('s', "Sin"),
-        CalculatorButton::new('u', "Undo"),
-        CalculatorButton::new('U', "Redo"),
-        CalculatorButton::new('>', "Swap"),
-        CalculatorButton::new('@', "Drop"),
+        // CalculatorButton::new('s', "Sin", true),
+        CalculatorButton::new('u', "Undo", true),
+        CalculatorButton::new('U', "Redo", true),
+        CalculatorButton::new('>', "Swap", true),
+        CalculatorButton::new('@', "Drop", true),
     ],
     &[
-        // CalculatorButton::new('|', "AbsoluteValue"),
-        CalculatorButton::new('v', "Sqrt"),
-        CalculatorButton::new('^', "Pow"),
-        CalculatorButton::new('l', "Log"),
-        CalculatorButton::new('L', "Ln"),
+        // CalculatorButton::new('|', "AbsoluteValue", true),
+        CalculatorButton::new('v', "Sqrt", true),
+        CalculatorButton::new('^', "Pow", true),
+        CalculatorButton::new('l', "Log", true),
+        CalculatorButton::new('L', "Ln", true),
     ],
     &[
-        // CalculatorButton::new('c', "Cos"),
-        CalculatorButton::new('n', "Negate"),
-        CalculatorButton::new('%', "Modulo"),
-        CalculatorButton::new('i', "Inverse"),
-        CalculatorButton::new('/', "Divide"),
+        // CalculatorButton::new('c', "Cos", true),
+        CalculatorButton::new('n', "Negate", true),
+        CalculatorButton::new('%', "Modulo", true),
+        CalculatorButton::new('i', "Inverse", true),
+        CalculatorButton::new('/', "Divide", true),
     ],
     &[
-        // CalculatorButton::new('t', "Tan"),
-        CalculatorButton::new('7', "7"),
-        CalculatorButton::new('8', "8"),
-        CalculatorButton::new('9', "9"),
-        CalculatorButton::new('*', "Multiply"),
+        // CalculatorButton::new('t', "Tan", true),
+        CalculatorButton::new('7', "7", true),
+        CalculatorButton::new('8', "8", true),
+        CalculatorButton::new('9', "9", true),
+        CalculatorButton::new('*', "Multiply", true),
     ],
     &[
-        // CalculatorButton::new('S', "ASin"),
-        CalculatorButton::new('4', "4"),
-        CalculatorButton::new('5', "5"),
-        CalculatorButton::new('6', "6"),
-        CalculatorButton::new('-', "Subtract"),
+        // CalculatorButton::new('S', "ASin", true),
+        CalculatorButton::new('4', "4", true),
+        CalculatorButton::new('5', "5", true),
+        CalculatorButton::new('6', "6", true),
+        CalculatorButton::new('-', "Subtract", true),
     ],
     &[
-        // CalculatorButton::new('C', "ACos"),
-        CalculatorButton::new('1', "1"),
-        CalculatorButton::new('2', "2"),
-        CalculatorButton::new('3', "3"),
-        CalculatorButton::new('+', "Add"),
+        // CalculatorButton::new('C', "ACos", true),
+        CalculatorButton::new('1', "1", true),
+        CalculatorButton::new('2', "2", true),
+        CalculatorButton::new('3', "3", true),
+        CalculatorButton::new('+', "Add", true),
     ],
     &[
-        // CalculatorButton::new('T', "ATan"),
-        CalculatorButton::new('0', "0"),
-        CalculatorButton::new('\\', "Drop"),
-        CalculatorButton::new('.', "Decimal"),
-        CalculatorButton::new(' ', "Return"),
+        // CalculatorButton::new('T', "ATan", true),
+        CalculatorButton::new('0', "0", true),
+        CalculatorButton::new('\\', "Drop", true),
+        CalculatorButton::new('.', "Decimal", true),
+        CalculatorButton::new(' ', "Return", true),
     ],
-    // CalculatorButton::new ( '?',  "IntegerDivide"),
-    // CalculatorButton::new ( 'V',  "BuildVector"),
-    // CalculatorButton::new ( 'M',  "BuildMatrix"),
-    // CalculatorButton::new ( '_',  "Deconstruct"),
-    // CalculatorButton::new ( ')',  "Transpose"),
+    // CalculatorButton::new ( '?',  "IntegerDivide", true),
+    // CalculatorButton::new ( 'V',  "BuildVector", true),
+    // CalculatorButton::new ( 'M',  "BuildMatrix", true),
+    // CalculatorButton::new ( '_',  "Deconstruct", true),
+    // CalculatorButton::new ( ', true)',  "Transpose"),
 ];
 
 enum ErrorState {