ui/events/gesture_detection/gesture_configuration.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 namespace ui {
   8 namespace {
   9
  10 GestureConfiguration* instance = nullptr;
  11
  12 }  // namespace
  13
  14 // static
  15 void GestureConfiguration::SetInstance(GestureConfiguration* config) {
  16   instance = config;
  17 }
  18
  19 // static
  20 GestureConfiguration* GestureConfiguration::GetInstance() {
  21   if (instance)
  22     return instance;
  23
  24   return GestureConfiguration::GetPlatformSpecificInstance();
  25 }
  26
  27 GestureConfiguration::GestureConfiguration()
  28     : default_radius_(25),
  29       double_tap_enabled_(false),
  30       double_tap_timeout_in_ms_(400),
  31       fling_max_cancel_to_down_time_in_ms_(400),
  32       fling_max_tap_gap_time_in_ms_(200),
  33       gesture_begin_end_types_enabled_(false),
  34       long_press_time_in_ms_(1000),
  35       max_distance_between_taps_for_double_tap_(20),
  36       max_distance_for_two_finger_tap_in_pixels_(300),
  37       max_fling_velocity_(17000.0f),
  38       max_gesture_bounds_length_(0),
  39       max_separation_for_gesture_touches_in_pixels_(150),
  40       max_swipe_deviation_angle_(20),
  41       max_time_between_double_click_in_ms_(700),
  42       max_touch_down_duration_for_click_in_ms_(800),
  43       max_touch_move_in_pixels_for_click_(15),
  44       min_distance_for_pinch_scroll_in_pixels_(20),
  45       min_fling_velocity_(30.0f),
  46       min_gesture_bounds_length_(0),
  47       min_pinch_update_span_delta_(0),
  48       // If this is too small, we currently can get single finger pinch zoom.
  49       // See crbug.com/357237 for details.
  50       min_scaling_span_in_pixels_(125),
  51       // The default value of min_scaling_touch_major_ is 2 * default_radius_.
  52       min_scaling_touch_major_(50),
  53       min_swipe_velocity_(20),
  54       // TODO(jdduke): Disable and remove entirely when issues with intermittent
  55       // scroll end detection on the Pixel are resolved, crbug.com/353702.
  56 #if defined(OS_CHROMEOS)
  57       scroll_debounce_interval_in_ms_(30),
  58 #else
  59       scroll_debounce_interval_in_ms_(0),
  60 #endif
  61       semi_long_press_time_in_ms_(400),
  62       show_press_delay_in_ms_(150),
  63       // The default value of span_slop_ is
  64       // 2 * max_touch_move_in_pixels_for_click_.
  65       span_slop_(30),
  66       swipe_enabled_(false),
  67       tab_scrub_activation_delay_in_ms_(200),
  68       two_finger_tap_enabled_(false),
  69       velocity_tracker_strategy_(VelocityTracker::Strategy::STRATEGY_DEFAULT) {
  70 }
  71
  72 GestureConfiguration::~GestureConfiguration() {
  73 }
  74
  75 }  // namespace ui