ui/events/gesture_detection/gesture_configuration_aura.cc

   1 // Copyright 2014 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 #include "ui/events/gesture_detection/gesture_configuration.h"
   6
   7 #include "base/command_line.h"
   8 #include "ui/events/event_switches.h"
   9
  10 namespace ui {
  11 namespace {
  12
  13 class GestureConfigurationAura : public GestureConfiguration {
  14  public:
  15   ~GestureConfigurationAura() override {
  16   }
  17
  18   static GestureConfigurationAura* GetInstance() {
  19     return Singleton<GestureConfigurationAura>::get();
  20   }
  21
  22  private:
  23   GestureConfigurationAura() : GestureConfiguration() {
  24     set_double_tap_enabled(false);
  25     set_double_tap_timeout_in_ms(semi_long_press_time_in_ms());
  26     set_gesture_begin_end_types_enabled(true);
  27     set_min_gesture_bounds_length(default_radius());
  28     set_min_pinch_update_span_delta(
  29         base::CommandLine::ForCurrentProcess()->HasSwitch(
  30             switches::kCompensateForUnstablePinchZoom)
  31             ? 5
  32             : 0);
  33     set_min_scaling_touch_major(default_radius() * 2);
  34     set_velocity_tracker_strategy(VelocityTracker::Strategy::LSQ2_RESTRICTED);
  35     set_span_slop(max_touch_move_in_pixels_for_click() * 2);
  36     set_swipe_enabled(true);
  37     set_two_finger_tap_enabled(true);
  38   }
  39
  40   friend struct DefaultSingletonTraits<GestureConfigurationAura>;
  41   DISALLOW_COPY_AND_ASSIGN(GestureConfigurationAura);
  42 };
  43
  44 }  // namespace
  45
  46 // Create a GestureConfigurationAura singleton instance when using aura.
  47 GestureConfiguration* GestureConfiguration::GetInstance() {
  48   return GestureConfigurationAura::GetInstance();
  49 }
  50
  51 }  // namespace ui