JUCE/modules/juce_audio_plugin_client/utility/juce_FakeMouseMoveGenerator.h

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

   This file is part of the JUCE library - "Jules' Utility Class Extensions"
   Copyright 2004-11 by Raw Material Software Ltd.

  ------------------------------------------------------------------------------

   JUCE can be redistributed and/or modified under the terms of the GNU General
   Public License (Version 2), as published by the Free Software Foundation.
   A copy of the license is included in the JUCE distribution, or can be found
   online at www.gnu.org/licenses.

   JUCE is distributed in the hope that it will be useful, but WITHOUT ANY
   WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
   A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

  ------------------------------------------------------------------------------

   To release a closed-source product which uses JUCE, commercial licenses are
   available: visit www.rawmaterialsoftware.com/juce for more information.

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

#ifndef __JUCE_FAKEMOUSEMOVEGENERATOR_JUCEHEADER__
#define __JUCE_FAKEMOUSEMOVEGENERATOR_JUCEHEADER__

#if JUCE_MAC && JUCE_SUPPORT_CARBON

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

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

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

            if (! mods.isAnyMouseButtonDown())
            {
                Component* comp = Desktop::getInstance().findComponentAt (screenPos);

                if (comp != nullptr)
                {
                    ComponentPeer* const peer = comp->getPeer();

                    if (peer != nullptr && ! peer->isFocused())
                        peer->handleMouseEvent (0, screenPos - peer->getScreenPosition(), mods, Time::currentTimeMillis());
                }
            }
        }
    }

private:
    Point<int> lastScreenPos;
};

#else
struct FakeMouseMoveGenerator {};
#endif

#endif   // __JUCE_FAKEMOUSEMOVEGENERATOR_JUCEHEADER__