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
14namespace ui {
15namespace {
16
17GestureDetector::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
47ScaleGestureDetector::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
65GestureProvider::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
80