36 lines
1.1 KiB
C++
36 lines
1.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#ifndef mozilla_layers_TouchCounter_h
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#define mozilla_layers_TouchCounter_h
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#include "mozilla/EventForwards.h"
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namespace mozilla {
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class MultiTouchInput;
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namespace layers {
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// TouchCounter simply tracks the number of active touch points. Feed it
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// your input events to update the internal state. Generally you should
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// only be calling one of the Update functions, depending on which type
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// of touch inputs you have access to.
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class TouchCounter {
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public:
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TouchCounter();
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void Update(const MultiTouchInput& aInput);
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void Update(const WidgetTouchEvent& aEvent);
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uint32_t GetActiveTouchCount() const;
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private:
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uint32_t mActiveTouchCount;
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};
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} // namespace layers
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} // namespace mozilla
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#endif /* mozilla_layers_TouchCounter_h */
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