src/ui/events/gesture_detection/gesture_config_helper_android.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 "ui/gfx/android/view_configuration.h"
   8 #include "ui/gfx/screen.h"
   9
  10 using gfx::ViewConfiguration;
  11
  12 namespace ui {
  13 namespace {
  14 // TODO(jdduke): Adopt GestureConfiguration on Android, crbug/339203.
  15
  16 GestureDetector::Config DefaultGestureDetectorConfig(
  17     const gfx::Display& display) {
  18   GestureDetector::Config config;
  19
  20   config.longpress_timeout = base::TimeDelta::FromMilliseconds(
  21       ViewConfiguration::GetLongPressTimeoutInMs());
  22   config.showpress_timeout =
  23       base::TimeDelta::FromMilliseconds(ViewConfiguration::GetTapTimeoutInMs());
  24   config.double_tap_timeout = base::TimeDelta::FromMilliseconds(
  25       ViewConfiguration::GetDoubleTapTimeoutInMs());
  26
  27   const float px_to_dp = 1.f / display.device_scale_factor();
  28   config.touch_slop =
  29       ViewConfiguration::GetTouchSlopInPixels() * px_to_dp;
  30   config.double_tap_slop =
  31       ViewConfiguration::GetDoubleTapSlopInPixels() * px_to_dp;
  32   config.minimum_fling_velocity =
  33       ViewConfiguration::GetMinimumFlingVelocityInPixelsPerSecond() * px_to_dp;
  34   config.maximum_fling_velocity =
  35       ViewConfiguration::GetMaximumFlingVelocityInPixelsPerSecond() * px_to_dp;
  36
  37   return config;
  38 }
  39
  40 ScaleGestureDetector::Config DefaultScaleGestureDetectorConfig(
  41     const gfx::Display& display) {
  42   ScaleGestureDetector::Config config;
  43
  44   config.gesture_detector_config = DefaultGestureDetectorConfig(display);
  45   config.quick_scale_enabled = true;
  46
  47   const float px_to_dp = 1.f / display.device_scale_factor();
  48   config.min_scaling_touch_major =
  49       ViewConfiguration::GetMinScalingTouchMajorInPixels() * px_to_dp;
  50   config.min_scaling_span =
  51       ViewConfiguration::GetMinScalingSpanInPixels() * px_to_dp;
  52
  53   return config;
  54 }
  55
  56 }  // namespace
  57
  58 GestureProvider::Config DefaultGestureProviderConfig() {
  59   GestureProvider::Config config;
  60   config.display = gfx::Screen::GetNativeScreen()->GetPrimaryDisplay();
  61   config.gesture_detector_config = DefaultGestureDetectorConfig(config.display);
  62   config.scale_gesture_detector_config =
  63       DefaultScaleGestureDetectorConfig(config.display);
  64   config.gesture_begin_end_types_enabled = false;
  65   return config;
  66 }
  67
  68 }  // namespace ui