JUCE/modules/juce_audio_plugin_client/utility/juce_FakeMouseMoveGenerator.h

/*
  ==============================================================================

   This file is part of the JUCE library.
   Copyright (c) 2017 - ROLI Ltd.

   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 5 End-User License
   Agreement and JUCE 5 Privacy Policy (both updated and effective as of the
   27th April 2017).

   End User License Agreement: www.juce.com/juce-5-licence
   Privacy Policy: www.juce.com/juce-5-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.

  ==============================================================================
*/

#pragma once

#if JUCE_MAC

//==============================================================================
// Helper class to workaround windows not getting mouse-moves...
class FakeMouseMoveGenerator  : private Timer
{
public:
    FakeMouseMoveGenerator()
    {
        startTimer (1000 / 30);
    }

    void timerCallback() override
    {
        // Workaround for windows not getting mouse-moves...
        const Point<float> screenPos (Desktop::getInstance().getMainMouseSource().getScreenPosition());

        if (screenPos != lastScreenPos)
        {
            lastScreenPos = screenPos;
            const ModifierKeys mods (ModifierKeys::getCurrentModifiers());

            if (! mods.isAnyMouseButtonDown())
                if (Component* const comp = Desktop::getInstance().findComponentAt (screenPos.roundToInt()))
                    if (ComponentPeer* const peer = comp->getPeer())
                        if (! peer->isFocused())
                            peer->handleMouseEvent (MouseInputSource::InputSourceType::mouse, peer->globalToLocal (screenPos), mods,
                                                    MouseInputSource::invalidPressure, MouseInputSource::invalidOrientation, Time::currentTimeMillis());
        }
    }

private:
    Point<float> lastScreenPos;
};

#else
struct FakeMouseMoveGenerator {};
#endif