From abbbfdfa79fee0a31257cbba307d838779d2b0a7 Mon Sep 17 00:00:00 2001
From: Malik Olivier Boussejra <malik@boussejra.com>
Date: Mon, 26 Mar 2018 00:31:23 +0900
Subject: [PATCH] imgui: Add mouse_delta

---
 src/lib.rs | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/lib.rs b/src/lib.rs
index ef59fc7..36b960a 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -190,6 +190,11 @@ impl ImGui {
         io.mouse_pos.x = x;
         io.mouse_pos.y = y;
     }
+    /// Get mouse's position's delta between the current and the last frame.
+    pub fn mouse_delta(&self) -> (f32, f32) {
+        let io = self.io();
+        (io.mouse_delta.x, io.mouse_delta.y)
+    }
     pub fn set_mouse_down(&mut self, states: &[bool; 5]) {
         let io = self.io_mut();
         io.mouse_down = *states;