1 // Copyright 2013 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef UI_GFX_ANDROID_VIEW_CONFIGURATION_H_ 6 #define UI_GFX_ANDROID_VIEW_CONFIGURATION_H_ 7 8 #include <jni.h> 9 10 #include "ui/gfx/gfx_export.h" 11 12 namespace gfx { 13 14 // Provides access to Android's ViewConfiguration for gesture-related constants. 15 // Note: All methods may be safely called from any thread. 16 class GFX_EXPORT ViewConfiguration { 17 public: 18 static int GetDoubleTapTimeoutInMs(); 19 static int GetLongPressTimeoutInMs(); 20 static int GetTapTimeoutInMs(); 21 22 // Dimensionless coefficient of friction. 23 static float GetScrollFriction(); 24 25 static int GetMaximumFlingVelocityInPixelsPerSecond(); 26 static int GetMinimumFlingVelocityInPixelsPerSecond(); 27 28 static int GetTouchSlopInPixels(); 29 static int GetDoubleTapSlopInPixels(); 30 31 static int GetMinScalingSpanInPixels(); 32 static int GetMinScalingTouchMajorInPixels(); 33 34 // Registers methods with JNI and returns true if succeeded. 35 static bool RegisterViewConfiguration(JNIEnv* env); 36 }; 37 38 } // namespace gfx 39 40 #endif // UI_GFX_ANDROID_VIEW_CONFIGURATION_H_ 41