inputdevice.cpp

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// PTF - Psychological Test Framework
// http://ptf.sourceforge.net
//
// This program is free software; you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation; either version 2 of the License, or
// (at your option) any later version.
//
// This program 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 Library General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

#include <ptf/input/inputdevice.hpp>
#include <ptf/core/reactionrecord.hpp>
#include <ptf/core/ptfcore.hpp>
#include <string>

// bring things into scope
using std::string;

InputDevice::InputDevice() {
    active = false;
}

InputDevice::~InputDevice() {
    // nothing to do here
}

void InputDevice::run() {
    // time
    TimeInterval* time = new TimeInterval();
    time->measureA();
    // poll loop
    while (active) {
        // poll input device
        bool eventsWaiting = poll();
        // handle input if necessary
        if (eventsWaiting) {
            // measure time - the event must have occured in the
            // now completed time interval
            time->measureB();
            // handle events
            vector<bool>* states = new vector<bool>;
            bool reactionsOccured = handle(*states);
            // look if reaction records have to be created
            if (reactionsOccured) {
                // create reaction record
                ReactionRecord* rec = new ReactionRecord(time, states);
                // add reaction record
                PtfCore::getSingleton().getReactionRecordsMutex().enterMutex();
                PtfCore::getSingleton().getReactionRecords().push_back(rec);
                PtfCore::getSingleton().getReactionRecordsMutex().leaveMutex();
                // convert button states to string
                string buttons;
                for (int i = 0; i < (int)states->size(); i++) {
                    if ((*states)[i]) buttons += '1';
                    else  buttons += '0';
                }
                // display info
                PtfCore::getSingleton().getEventLog() << "Event caught:\n"
                    << "\tValid reaction at " << time->toString() << " with [" << buttons << "]\n";
                // create new time interval
                time = new TimeInterval();
            }
            else {
                PtfCore::getSingleton().getEventLog() << "Event caught:\n"
                    << "\tInvalid reaction at " << time->toString() << "\n";
            }
        }
        // update time interval
        time->measureA();
    }
}

bool InputDevice::poll() {
    return false;
}  

bool InputDevice::handle(vector<bool>& states) {
    return false;
}

void InputDevice::startPolling() {
    active = true;
    start();
}

void InputDevice::stopPolling() {
    active = false;
}

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