root/ui/events/gesture_detection/gesture_config_helper_aura.cc

DEFINITIONS

1. DefaultGestureDetectorConfig
2. DefaultScaleGestureDetectorConfig
3. DefaultSnapScrollControllerConfig
4. DefaultGestureProviderConfig

// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "ui/events/gesture_detection/gesture_config_helper.h"

#include "ui/events/gestures/gesture_configuration.h"
#include "ui/gfx/screen.h"

namespace ui {

GestureDetector::Config DefaultGestureDetectorConfig() {
  GestureDetector::Config config;

  config.longpress_timeout = base::TimeDelta::FromMilliseconds(
      GestureConfiguration::long_press_time_in_seconds() * 1000.);
  config.showpress_timeout = base::TimeDelta::FromMilliseconds(
      GestureConfiguration::show_press_delay_in_ms());
  config.double_tap_timeout = base::TimeDelta::FromMilliseconds(
      GestureConfiguration::semi_long_press_time_in_seconds() * 1000.);
  config.scaled_touch_slop =
      GestureConfiguration::max_touch_move_in_pixels_for_click();
  config.scaled_double_tap_slop =
      GestureConfiguration::max_distance_between_taps_for_double_tap();
  config.scaled_minimum_fling_velocity =
      GestureConfiguration::min_scroll_velocity();
  config.scaled_maximum_fling_velocity =
      GestureConfiguration::fling_velocity_cap();

  return config;
}

ScaleGestureDetector::Config DefaultScaleGestureDetectorConfig() {
  ScaleGestureDetector::Config config;

  config.gesture_detector_config = DefaultGestureDetectorConfig();
  config.min_scaling_touch_major = GestureConfiguration::default_radius() / 2;
  config.min_scaling_span =
      GestureConfiguration::min_distance_for_pinch_scroll_in_pixels();
  return config;
}

SnapScrollController::Config DefaultSnapScrollControllerConfig() {
  SnapScrollController::Config config;

  const gfx::Display& display =
      gfx::Screen::GetNativeScreen()->GetPrimaryDisplay();

  config.screen_width_pixels = display.GetSizeInPixel().width();
  config.screen_height_pixels = display.GetSizeInPixel().height();
  config.device_scale_factor = display.device_scale_factor();

  return config;
}

GestureProvider::Config DefaultGestureProviderConfig() {
  GestureProvider::Config config;
  config.gesture_detector_config = DefaultGestureDetectorConfig();
  config.scale_gesture_detector_config = DefaultScaleGestureDetectorConfig();
  config.snap_scroll_controller_config = DefaultSnapScrollControllerConfig();
  return config;
}

}  // namespace ui