115 lines
3.2 KiB
C
115 lines
3.2 KiB
C
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/*
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==============================================================================
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This file is part of the JUCE library.
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Copyright (c) 2017 - ROLI Ltd.
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JUCE is an open source library subject to commercial or open-source
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licensing.
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By using JUCE, you agree to the terms of both the JUCE 5 End-User License
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Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
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27th April 2017).
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End User License Agreement: www.juce.com/juce-5-licence
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Privacy Policy: www.juce.com/juce-5-privacy-policy
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Or: You may also use this code under the terms of the GPL v3 (see
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www.gnu.org/licenses).
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JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
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EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
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DISCLAIMED.
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==============================================================================
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*/
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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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// VS2013 can't default move constructors
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TouchInfo (TouchInfo&& other) noexcept : touchId (other.touchId), owner (other.owner) {}
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// VS2013 can't default move assignments
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TouchInfo& operator= (TouchInfo&& other) noexcept
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{
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touchId = other.touchId;
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owner = other.owner;
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return *this;
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}
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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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