| // Copyright 2014 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. |
| |
| #include "ui/events/gesture_detection/gesture_configuration.h" |
| |
| #include "base/android/build_info.h" |
| #include "base/macros.h" |
| #include "base/memory/singleton.h" |
| #include "ui/display/screen.h" |
| #include "ui/gfx/android/view_configuration.h" |
| |
| using gfx::ViewConfiguration; |
| |
| namespace ui { |
| namespace { |
| |
| // Touch radii on Android can be both noisy and inaccurate. The old Java |
| // gesture detection pipeline used a fixed value of 24 as the gesture bounds. |
| // We relax that value somewhat, but not by much; there's a fairly small window |
| // within which gesture bounds are useful for features like touch adjustment. |
| const float kMinGestureBoundsLengthDips = 20.f; |
| const float kMaxGestureBoundsLengthDips = 32.f; |
| |
| class GestureConfigurationAndroid : public GestureConfiguration { |
| public: |
| ~GestureConfigurationAndroid() override { |
| } |
| |
| static GestureConfigurationAndroid* GetInstance() { |
| return base::Singleton<GestureConfigurationAndroid>::get(); |
| } |
| |
| private: |
| GestureConfigurationAndroid() : GestureConfiguration() { |
| set_double_tap_enabled(true); |
| set_double_tap_timeout_in_ms(ViewConfiguration::GetDoubleTapTimeoutInMs()); |
| // TODO(jdduke): Enable this on Android M after the implicit conflict with |
| // stylus selection is resolved. |
| set_stylus_scale_enabled(false); |
| #if defined(USE_AURA) |
| set_gesture_begin_end_types_enabled(true); |
| #else |
| set_gesture_begin_end_types_enabled(false); |
| #endif |
| set_long_press_time_in_ms(ViewConfiguration::GetLongPressTimeoutInMs()); |
| set_max_distance_between_taps_for_double_tap( |
| ViewConfiguration::GetDoubleTapSlopInDips()); |
| set_max_fling_velocity( |
| ViewConfiguration::GetMaximumFlingVelocityInDipsPerSecond()); |
| set_max_gesture_bounds_length(kMaxGestureBoundsLengthDips); |
| set_max_touch_move_in_pixels_for_click( |
| ViewConfiguration::GetTouchSlopInDips()); |
| set_min_fling_velocity( |
| ViewConfiguration::GetMinimumFlingVelocityInDipsPerSecond()); |
| set_min_gesture_bounds_length(kMinGestureBoundsLengthDips); |
| set_min_pinch_update_span_delta(0.f); |
| set_min_scaling_span_in_pixels( |
| ViewConfiguration::GetMinScalingSpanInDips()); |
| set_show_press_delay_in_ms(ViewConfiguration::GetTapTimeoutInMs()); |
| set_span_slop(ViewConfiguration::GetTouchSlopInDips() * 2.f); |
| set_fling_touchscreen_tap_suppression_enabled(true); |
| set_fling_touchpad_tap_suppression_enabled(false); |
| set_fling_max_cancel_to_down_time_in_ms( |
| ViewConfiguration::GetTapTimeoutInMs()); |
| set_fling_max_tap_gap_time_in_ms( |
| ViewConfiguration::GetLongPressTimeoutInMs()); |
| } |
| |
| friend struct base::DefaultSingletonTraits<GestureConfigurationAndroid>; |
| DISALLOW_COPY_AND_ASSIGN(GestureConfigurationAndroid); |
| }; |
| |
| } // namespace |
| |
| // Create a GestureConfigurationAura singleton instance when using Android. |
| GestureConfiguration* GestureConfiguration::GetPlatformSpecificInstance() { |
| return GestureConfigurationAndroid::GetInstance(); |
| } |
| |
| } // namespace ui |