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 80
