Improve Material ink effects

sky/framework/theme/view-configuration.dart

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Modeled after Android's ViewConfiguration:
 // https://github.com/android/platform_frameworks_base/blob/master/core/java/android/view/ViewConfiguration.java
 
-const int kMaxFlingVelocity = 8000;
-const int kMinFlingVelocity = 50;
-const int kScrollbarFadeDelay = 300;
-const int kScrollbarFadeDuration = 250;
-const int kScrollbarSize = 10;
-const int kStatusBarHeight = 25;
+const double kStatusBarHeight = 25.0;
+const double kScrollbarSize = 10.0;
+const double kScrollbarFadeDuration = 250.0;
+const double kScrollbarFadeDelay = 300.0;
+const double kFadingEdgeLength = 12.0;
+const double kPressedStateDuration = 64.0;
+const double kDefaultLongPressTimeout = 500.0;
+const double kTapTimeout = 100.0;
+const double kJumpTapTimeout = 500.0;
+const double kDoubleTapTimeout = 300.0;
+const double kDoubleTapMinTime = 40.0;
+const double kHoverTapTimeout = 150.0;
+const double kHoverTapSlop = 20.0;
+const double kZoomControlsTimeout = 3000.0;
+const double kEdgeSlop = 12.0;
+const double kTouchSlop = 8.0;
+const double kDoubleTapTouchSlop = kTouchSlop;
+const double kPagingTouchSlop = kTouchSlop * 2.0;
+const double kDoubleTapSlop = 100.0;
+const double kWindowTouchSlop = 16.0;
+const double kMinFlingVelocity = 50.0;
+const double kMaxFlingVelocity = 8000.0;