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