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116 lines
3.7 KiB
C++
116 lines
3.7 KiB
C++
/*
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==============================================================================
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This file is part of the JUCE framework.
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Copyright (c) Raw Material Software Limited
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JUCE is an open source framework subject to commercial or open source
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licensing.
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By downloading, installing, or using the JUCE framework, or combining the
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JUCE framework with any other source code, object code, content or any other
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copyrightable work, you agree to the terms of the JUCE End User Licence
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Agreement, and all incorporated terms including the JUCE Privacy Policy and
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the JUCE Website Terms of Service, as applicable, which will bind you. If you
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do not agree to the terms of these agreements, we will not license the JUCE
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framework to you, and you must discontinue the installation or download
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process and cease use of the JUCE framework.
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JUCE End User Licence Agreement: https://juce.com/legal/juce-8-licence/
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JUCE Privacy Policy: https://juce.com/juce-privacy-policy
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JUCE Website Terms of Service: https://juce.com/juce-website-terms-of-service/
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Or:
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You may also use this code under the terms of the AGPLv3:
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https://www.gnu.org/licenses/agpl-3.0.en.html
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THE JUCE FRAMEWORK IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL
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WARRANTIES, WHETHER EXPRESSED OR IMPLIED, INCLUDING WARRANTY OF
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MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE DISCLAIMED.
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==============================================================================
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*/
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JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wzero-as-null-pointer-constant")
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namespace juce
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{
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template <typename IDType>
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class MultiTouchMapper
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{
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public:
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MultiTouchMapper() {}
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int getIndexOfTouch (ComponentPeer* peer, IDType touchID)
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{
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jassert (touchID != 0); // need to rethink this if IDs can be 0!
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TouchInfo info {touchID, peer};
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int touchIndex = currentTouches.indexOf (info);
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if (touchIndex < 0)
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{
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auto emptyTouchIndex = currentTouches.indexOf ({});
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touchIndex = (emptyTouchIndex >= 0 ? emptyTouchIndex : currentTouches.size());
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currentTouches.set (touchIndex, info);
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}
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return touchIndex;
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}
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void clear()
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{
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currentTouches.clear();
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}
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void clearTouch (int index)
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{
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currentTouches.set (index, {});
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}
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bool areAnyTouchesActive() const noexcept
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{
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for (auto& t : currentTouches)
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if (t.touchId != 0)
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return true;
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return false;
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}
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void deleteAllTouchesForPeer (ComponentPeer* peer)
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{
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for (auto& t : currentTouches)
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if (t.owner == peer)
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t.touchId = 0;
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}
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private:
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//==============================================================================
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struct TouchInfo
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{
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TouchInfo() noexcept : touchId (0), owner (nullptr) {}
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TouchInfo (IDType idToUse, ComponentPeer* peer) noexcept : touchId (idToUse), owner (peer) {}
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TouchInfo (const TouchInfo&) = default;
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TouchInfo& operator= (const TouchInfo&) = default;
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TouchInfo (TouchInfo&&) noexcept = default;
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TouchInfo& operator= (TouchInfo&&) noexcept = default;
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IDType touchId;
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ComponentPeer* owner;
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bool operator== (const TouchInfo& o) const noexcept { return (touchId == o.touchId); }
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};
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//==============================================================================
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Array<TouchInfo> currentTouches;
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JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MultiTouchMapper)
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};
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} // namespace juce
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JUCE_END_IGNORE_WARNINGS_GCC_LIKE
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