1234567891011121314151617181920212223242526272829303132333435363738394041424344454647484950515253545556575859606162636465666768697071727374757677787980818283848586878889909192 |
- // 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/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(const GestureConfigurationAndroid&) = delete;
- GestureConfigurationAndroid& operator=(const GestureConfigurationAndroid&) =
- delete;
- ~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());
- // Android ViewConfiguration doesn't have a short-press timeout. We are
- // using the heuristic that it would be 100ms less than the long-press
- // provided this is not too close with show-press.
- //
- // TODO(https://crbug.com/1294280): Replace this with platform-defined
- // timeout when available.
- set_short_press_time(base::Milliseconds(
- std::max(long_press_time_in_ms() - 100, long_press_time_in_ms() / 2)));
- }
- friend struct base::DefaultSingletonTraits<GestureConfigurationAndroid>;
- };
- } // namespace
- // Create a GestureConfigurationAura singleton instance when using Android.
- GestureConfiguration* GestureConfiguration::GetPlatformSpecificInstance() {
- return GestureConfigurationAndroid::GetInstance();
- }
- } // namespace ui
|