paulxstretch/deps/juce/modules/juce_gui_basics/native/juce_MultiTouchMapper.h

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/*
==============================================================================
This file is part of the JUCE library.
Copyright (c) 2020 - Raw Material Software Limited
JUCE is an open source library subject to commercial or open-source
licensing.
By using JUCE, you agree to the terms of both the JUCE 6 End-User License
Agreement and JUCE Privacy Policy (both effective as of the 16th June 2020).
End User License Agreement: www.juce.com/juce-6-licence
Privacy Policy: www.juce.com/juce-privacy-policy
Or: You may also use this code under the terms of the GPL v3 (see
www.gnu.org/licenses).
JUCE IS PROVIDED "AS IS" WITHOUT ANY WARRANTY, AND ALL WARRANTIES, WHETHER
EXPRESSED OR IMPLIED, INCLUDING MERCHANTABILITY AND FITNESS FOR PURPOSE, ARE
DISCLAIMED.
==============================================================================
*/
JUCE_BEGIN_IGNORE_WARNINGS_GCC_LIKE ("-Wzero-as-null-pointer-constant")
namespace juce
{
template <typename IDType>
class MultiTouchMapper
{
public:
MultiTouchMapper() {}
int getIndexOfTouch (ComponentPeer* peer, IDType touchID)
{
jassert (touchID != 0); // need to rethink this if IDs can be 0!
TouchInfo info {touchID, peer};
int touchIndex = currentTouches.indexOf (info);
if (touchIndex < 0)
{
auto emptyTouchIndex = currentTouches.indexOf ({});
touchIndex = (emptyTouchIndex >= 0 ? emptyTouchIndex : currentTouches.size());
currentTouches.set (touchIndex, info);
}
return touchIndex;
}
void clear()
{
currentTouches.clear();
}
void clearTouch (int index)
{
currentTouches.set (index, {});
}
bool areAnyTouchesActive() const noexcept
{
for (auto& t : currentTouches)
if (t.touchId != 0)
return true;
return false;
}
void deleteAllTouchesForPeer (ComponentPeer* peer)
{
for (auto& t : currentTouches)
if (t.owner == peer)
t.touchId = 0;
}
private:
//==============================================================================
struct TouchInfo
{
TouchInfo() noexcept : touchId (0), owner (nullptr) {}
TouchInfo (IDType idToUse, ComponentPeer* peer) noexcept : touchId (idToUse), owner (peer) {}
TouchInfo (const TouchInfo&) = default;
TouchInfo& operator= (const TouchInfo&) = default;
TouchInfo (TouchInfo&&) noexcept = default;
TouchInfo& operator= (TouchInfo&&) noexcept = default;
IDType touchId;
ComponentPeer* owner;
bool operator== (const TouchInfo& o) const noexcept { return (touchId == o.touchId); }
};
//==============================================================================
Array<TouchInfo> currentTouches;
JUCE_DECLARE_NON_COPYABLE_WITH_LEAK_DETECTOR (MultiTouchMapper)
};
} // namespace juce
JUCE_END_IGNORE_WARNINGS_GCC_LIKE