From 91478edd9fd44ed15741feeed32af1d2d53b978d Mon Sep 17 00:00:00 2001
From: "Manu Mtz.-Almeida" <manu.valladolid@gmail.com>
Date: Wed, 23 Nov 2016 20:16:28 +0100
Subject: [PATCH] fix(menu): improves menu swipe animation

---
 src/animations/animation.ts       | 2 +-
 src/components/menu/menu-types.ts | 3 ++-
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/animations/animation.ts b/src/animations/animation.ts
index 5d2ff897049..68ada6a9cd0 100644
--- a/src/animations/animation.ts
+++ b/src/animations/animation.ts
@@ -1016,7 +1016,7 @@ export class Animation {
     if (dur < 0) {
       dur = this._dur;
     }
-    this._isAsync = (currentStepValue > 0.05 && currentStepValue < 0.95 && dur > 30);
+    this._isAsync = (dur > 30);
 
     this._progressEnd(shouldComplete, stepValue, dur, this._isAsync);
 
diff --git a/src/components/menu/menu-types.ts b/src/components/menu/menu-types.ts
index 4c4714376d3..8ecc4e93d60 100644
--- a/src/components/menu/menu-types.ts
+++ b/src/components/menu/menu-types.ts
@@ -59,7 +59,8 @@ export class MenuType {
       done(isOpen);
     }, true);
 
-    let dur = this.ani.getDuration() / (Math.abs(velocity) + 1);
+    let factor = 1 - Math.min(Math.abs(velocity) / 4, 0.7);
+    let dur = this.ani.getDuration() * factor;
 
     this.ani.progressEnd(shouldComplete, currentStepValue, dur);
   }