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