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//
// libavg - Media Playback Engine.
// Copyright (C) 2003-2014 Ulrich von Zadow
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 2 of the License, or (at your option) any later version.
//
// This library 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
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public
// License along with this library; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
//
// Current versions can be found at www.libavg.de
//
#include "AppleTrackpadInputDevice.h"
#include "TouchEvent.h"
#include "Player.h"
#include "AVGNode.h"
#include "TouchStatus.h"
#include "../base/Logger.h"
#include "../base/ObjectCounter.h"
#include "../base/Exception.h"
#include <CoreFoundation/CoreFoundation.h>
using namespace std;
namespace avg {
AppleTrackpadInputDevice* AppleTrackpadInputDevice::s_pInstance(0);
AppleTrackpadInputDevice::AppleTrackpadInputDevice()
: m_LastID(0)
{
s_pInstance = this;
}
AppleTrackpadInputDevice::~AppleTrackpadInputDevice()
{
MTDeviceStop(m_Device);
MTUnregisterContactFrameCallback(m_Device, callback);
MTDeviceRelease(m_Device);
s_pInstance = 0;
}
void AppleTrackpadInputDevice::start()
{
MultitouchInputDevice::start();
m_Device = MTDeviceCreateDefault();
MTRegisterContactFrameCallback(m_Device, callback);
MTDeviceStart(m_Device, 0);
AVG_TRACE(Logger::category::CONFIG, Logger::severity::INFO,
"Apple Trackpad Multitouch event source created.");
}
void AppleTrackpadInputDevice::onData(int device, Finger* pFingers, int numFingers,
float timestamp, int frame)
{
lock_guard lock(getMutex());
for (int i = 0; i < numFingers; i++) {
Finger* pFinger = &pFingers[i];
TouchStatusPtr pTouchStatus = getTouchStatus(pFinger->identifier);
if (!pTouchStatus) {
m_LastID++;
TouchEventPtr pEvent = createEvent(m_LastID, pFinger, Event::CURSOR_DOWN);
addTouchStatus(pFinger->identifier, pEvent);
} else {
Event::Type eventType;
if (pFinger->state == 7) {
eventType = Event::CURSOR_UP;
removeTouchStatus(pFinger->identifier);
} else {
eventType = Event::CURSOR_MOTION;
}
TouchEventPtr pEvent = createEvent(0, pFinger, eventType);
pTouchStatus->pushEvent(pEvent);
}
}
}
int AppleTrackpadInputDevice::callback(int device, Finger *data, int nFingers,
double timestamp, int frame)
{
AVG_ASSERT(s_pInstance != 0);
s_pInstance->onData(device, data, nFingers, timestamp, frame);
return 0;
}
TouchEventPtr AppleTrackpadInputDevice::createEvent(int avgID, Finger* pFinger,
Event::Type eventType)
{
glm::vec2 size = getTouchArea();
IntPoint pos = getScreenPos(glm::vec2(pFinger->normalized.pos.x,
1-pFinger->normalized.pos.y));
glm::vec2 speed(pFinger->normalized.vel.x*size.x, pFinger->normalized.vel.y*size.y);
float eccentricity = pFinger->majorAxis/pFinger->minorAxis;
glm::vec2 majorAxis = fromPolar(pFinger->angle, pFinger->majorAxis);
majorAxis.y = -majorAxis.y;
glm::vec2 minorAxis = fromPolar(pFinger->angle+1.57, pFinger->minorAxis);
minorAxis.y = -minorAxis.y;
TouchEventPtr pEvent(new TouchEvent(avgID, eventType, pos, Event::TOUCH,
speed, pFinger->angle, pFinger->size, eccentricity, majorAxis,
minorAxis));
return pEvent;
}
}
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