From 9537fd83b3c2ef9812c816db0b8133388bbdd33e Mon Sep 17 00:00:00 2001
From: Joonas Javanainen <joonas.javanainen@gmail.com>
Date: Sun, 3 Jun 2018 11:27:10 +0300
Subject: [PATCH] Render callback should be FnOnce

The callback is no longer called multiple times
---
 src/lib.rs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/lib.rs b/src/lib.rs
index 8e22bc9..87c0190 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -502,9 +502,9 @@ impl<'ui> Ui<'ui> {
         let io = self.imgui.io();
         io.metrics_active_windows
     }
-    pub fn render<F, E>(self, mut f: F) -> Result<(), E>
+    pub fn render<F, E>(self, f: F) -> Result<(), E>
     where
-        F: FnMut(&Ui, DrawData) -> Result<(), E>,
+        F: FnOnce(&Ui, DrawData) -> Result<(), E>,
     {
         unsafe {
             sys::igRender();