From 11172db7f64d84b80a15cee04278afaae99cb4fb Mon Sep 17 00:00:00 2001
From: YuKun Liu <41265098+mrxiaozhuox@users.noreply.github.com>
Date: Fri, 7 Jan 2022 07:45:21 +0800
Subject: [PATCH] fix: calculator example

---
 examples/calculator.rs | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/examples/calculator.rs b/examples/calculator.rs
index 0f6a7e927..c48ab4976 100644
--- a/examples/calculator.rs
+++ b/examples/calculator.rs
@@ -113,11 +113,12 @@ fn app(cx: Scope) -> Element {
                                 button {
                                     class: "calculator-key key-sign",
                                     onclick: move |_| {
-                                        // if display_value.starts_with("-") {
-                                        //     display_value.set(display_value.trim_start_matches("-").to_string())
-                                        // } else {
-                                        //     display_value.set(format!("-{}", *display_value))
-                                        // }
+                                        let temp = calc_val(display_value.get().clone());
+                                        if temp > 0.0 {
+                                            cur_val.set(temp - (temp * 2.0));
+                                        } else {
+                                            cur_val.set(temp);
+                                        }
                                     },
                                     "±"
                                 }