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 7 namespace switches { 8 9 // Enable scroll prediction for scroll update events. 10 const char kEnableScrollPrediction[] = "enable-scroll-prediction"; 11 12 // Enable support for touch events. 13 const 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. 17 const char kTouchEventsAuto[] = "auto"; 18 // enabled: touch events always enabled. 19 const char kTouchEventsEnabled[] = "enabled"; 20 // disabled: touch events are disabled. 21 const 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. 27 const 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'. 34 const 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>". 39 const char kTouchCalibration[] = "touch-calibration"; 40 #endif 41 42 } // namespace switches 43