ui/base/touch/touch_device.h

   1 // Copyright (c) 2012 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 #ifndef UI_BASE_TOUCH_TOUCH_DEVICE_H_
   6 #define UI_BASE_TOUCH_TOUCH_DEVICE_H_
   7
   8 #include "ui/base/ui_base_export.h"
   9
  10 #if defined(OS_ANDROID)
  11 #include <jni.h>
  12 #endif
  13
  14 // TODO(mustaq@chromium.org): This covers more than just touches. Rename to
  15 // input_device? crbug.com/438794
  16
  17 namespace ui {
  18
  19 // Returns true if a touch device is available.
  20 UI_BASE_EXPORT bool IsTouchDevicePresent();
  21
  22 // Returns the maximum number of simultaneous touch contacts supported
  23 // by the device. In the case of devices with multiple digitizers (e.g.
  24 // multiple touchscreens), the value MUST be the maximum of the set of
  25 // maximum supported contacts by each individual digitizer.
  26 // For example, suppose a device has 3 touchscreens, which support 2, 5,
  27 // and 10 simultaneous touch contacts, respectively. This returns 10.
  28 // http://www.w3.org/TR/pointerevents/#widl-Navigator-maxTouchPoints
  29 UI_BASE_EXPORT int MaxTouchPoints();
  30
  31 // Bit field values indicating available pointer types. Identical to
  32 // blink::WebSettings::PointerType enums, enforced by compile-time assertions
  33 // in content/public/common/web_preferences.cc .
  34 // GENERATED_JAVA_ENUM_PACKAGE: org.chromium.ui.base
  35 // GENERATED_JAVA_PREFIX_TO_STRIP: POINTER_TYPE_
  36 enum PointerType {
  37   POINTER_TYPE_NONE = 1 << 0,
  38   POINTER_TYPE_FIRST = POINTER_TYPE_NONE,
  39   POINTER_TYPE_COARSE = 1 << 1,
  40   POINTER_TYPE_FINE = 1 << 2,
  41   POINTER_TYPE_LAST = POINTER_TYPE_FINE
  42 };
  43
  44 // Bit field values indicating available hover types. Identical to
  45 // blink::WebSettings::HoverType enums, enforced by compile-time assertions
  46 // in content/public/common/web_preferences.cc .
  47 // GENERATED_JAVA_ENUM_PACKAGE: org.chromium.ui.base
  48 // GENERATED_JAVA_PREFIX_TO_STRIP: HOVER_TYPE_
  49 enum HoverType {
  50   HOVER_TYPE_NONE = 1 << 0,
  51   HOVER_TYPE_FIRST = HOVER_TYPE_NONE,
  52   HOVER_TYPE_ON_DEMAND = 1 << 1,
  53   HOVER_TYPE_HOVER = 1 << 2,
  54   HOVER_TYPE_LAST = HOVER_TYPE_HOVER
  55 };
  56
  57 UI_BASE_EXPORT int GetAvailablePointerTypes();
  58 UI_BASE_EXPORT PointerType GetPrimaryPointerType();
  59 UI_BASE_EXPORT int GetAvailableHoverTypes();
  60 UI_BASE_EXPORT HoverType GetPrimaryHoverType();
  61
  62 #if defined(OS_ANDROID)
  63 bool RegisterTouchDeviceAndroid(JNIEnv* env);
  64 #endif
  65
  66 }  // namespace ui
  67
  68 #endif  // UI_BASE_TOUCH_TOUCH_DEVICE_H_