event_switches.cc revision 1320f92c476a1ad9d19dba2a48c72b75566198e9 
1// Copyright 2013 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/event_switches.h"
6
7namespace switches {
8
9// Enable scroll prediction for scroll update events.
10const char kEnableScrollPrediction[] = "enable-scroll-prediction";
11
12// Enable support for touch events.
13const char kTouchEvents[] = "touch-events";
14
15// The values the kTouchEvents switch may have, as in --touch-events=disabled.
16//   auto: enabled at startup when an attached touchscreen is present.
17const char kTouchEventsAuto[] = "auto";
18//   enabled: touch events always enabled.
19const char kTouchEventsEnabled[] = "enabled";
20//   disabled: touch events are disabled.
21const char kTouchEventsDisabled[] = "disabled";
22
23// Enable compensation for unstable pinch zoom. Some touch screens display
24// significant amount of wobble when moving a finger in a straight line. This
25// makes two finger scroll trigger an oscillating pinch zoom. See
26// crbug.com/394380 for details.
27const char kCompensateForUnstablePinchZoom[] =
28    "compensate-for-unstable-pinch-zoom";
29
30#if defined(OS_LINUX)
31// Tells chrome to interpret events from these devices as touch events. Only
32// available with XInput 2 (i.e. X server 1.8 or above). The id's of the
33// devices can be retrieved from 'xinput list'.
34const char kTouchDevices[] = "touch-devices";
35#endif
36
37#if defined(USE_XI2_MT) || defined(USE_OZONE)
38// The calibration factors given as "<left>,<right>,<top>,<bottom>".
39const char kTouchCalibration[] = "touch-calibration";
40#endif
41
42}  // namespace switches
43