src/ui/events/gesture_detection/gesture_config_helper_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_config_helper.h"
   6
   7 #include <cmath>
   8
   9 #include "base/command_line.h"
  10 #include "ui/events/event_switches.h"
  11 #include "ui/events/gestures/gesture_configuration.h"
  12 #include "ui/gfx/screen.h"
  13
  14 namespace ui {
  15 namespace {
  16
  17 GestureDetector::Config DefaultGestureDetectorConfig() {
  18   GestureDetector::Config config;
  19
  20   config.longpress_timeout = base::TimeDelta::FromMilliseconds(
  21       GestureConfiguration::long_press_time_in_seconds() * 1000.);
  22   config.showpress_timeout = base::TimeDelta::FromMilliseconds(
  23       GestureConfiguration::show_press_delay_in_ms());
  24   config.double_tap_timeout = base::TimeDelta::FromMilliseconds(
  25       GestureConfiguration::semi_long_press_time_in_seconds() * 1000.);
  26   config.touch_slop =
  27       GestureConfiguration::max_touch_move_in_pixels_for_click();
  28   config.double_tap_slop =
  29       GestureConfiguration::max_distance_between_taps_for_double_tap();
  30   config.minimum_fling_velocity =
  31       GestureConfiguration::min_scroll_velocity();
  32   config.maximum_fling_velocity = GestureConfiguration::fling_velocity_cap();
  33   config.swipe_enabled = true;
  34   config.minimum_swipe_velocity = GestureConfiguration::min_swipe_speed();
  35   config.maximum_swipe_deviation_angle =
  36       GestureConfiguration::max_swipe_deviation_angle();
  37   config.two_finger_tap_enabled = true;
  38   config.two_finger_tap_max_separation =
  39       GestureConfiguration::max_distance_for_two_finger_tap_in_pixels();
  40   config.two_finger_tap_timeout = base::TimeDelta::FromMilliseconds(
  41       GestureConfiguration::max_touch_down_duration_in_seconds_for_click() *
  42       1000.);
  43
  44   return config;
  45 }
  46
  47 ScaleGestureDetector::Config DefaultScaleGestureDetectorConfig() {
  48   ScaleGestureDetector::Config config;
  49   double min_pinch_update_distance =
  50       CommandLine::ForCurrentProcess()->HasSwitch(
  51           switches::kCompensateForUnstablePinchZoom)
  52           ? GestureConfiguration::min_pinch_update_distance_in_pixels()
  53           : 0;
  54
  55   config.span_slop =
  56       GestureConfiguration::max_touch_move_in_pixels_for_click() * 2;
  57   config.min_scaling_touch_major = GestureConfiguration::default_radius() * 2;
  58   config.min_scaling_span = GestureConfiguration::min_scaling_span_in_pixels();
  59   config.min_pinch_update_span_delta = min_pinch_update_distance;
  60   return config;
  61 }
  62
  63 }  // namespace
  64
  65 GestureProvider::Config DefaultGestureProviderConfig() {
  66   GestureProvider::Config config;
  67   gfx::Screen* screen = gfx::Screen::GetScreenByType(gfx::SCREEN_TYPE_NATIVE);
  68   // |screen| is sometimes NULL during tests.
  69   if (screen)
  70     config.display = screen->GetPrimaryDisplay();
  71   config.gesture_detector_config = DefaultGestureDetectorConfig();
  72   config.scale_gesture_detector_config = DefaultScaleGestureDetectorConfig();
  73   config.gesture_begin_end_types_enabled = true;
  74   // Half the size of the default touch length is a reasonable minimum.
  75   config.min_gesture_bounds_length = GestureConfiguration::default_radius();
  76   return config;
  77 }
  78
  79 }  // namespace ui