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| 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 | |
| 15 namespace ui { | |
| 16 | |
| 17 // Returns true if a touch device is available. | |
| 18 UI_BASE_EXPORT bool IsTouchDevicePresent(); | |
| 19 | |
| 20 // Returns the maximum number of simultaneous touch contacts supported | |
| 21 // by the device. In the case of devices with multiple digitizers (e.g. | |
| 22 // multiple touchscreens), the value MUST be the maximum of the set of | |
| 23 // maximum supported contacts by each individual digitizer. | |
| 24 // For example, suppose a device has 3 touchscreens, which support 2, 5, | |
| 25 // and 10 simultaneous touch contacts, respectively. This returns 10. | |
| 26 // http://www.w3.org/TR/pointerevents/#widl-Navigator-maxTouchPoints | |
| 27 UI_BASE_EXPORT int MaxTouchPoints(); | |
| 28 | |
| 29 #if defined(OS_ANDROID) | |
| 30 bool RegisterTouchDeviceAndroid(JNIEnv* env); | |
| 31 #endif | |
| 32 | |
| 33 } // namespace ui | |
| 34 | |
| 35 #endif // UI_BASE_TOUCH_TOUCH_DEVICE_H_ | |
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