mmsinputgesture.cpp

00001 /***************************************************************************
00002  *   Copyright (C) 2005-2007 Stefan Schwarzer, Jens Schneider,             *
00003  *                           Matthias Hardt, Guido Madaus                  *
00004  *                                                                         *
00005  *   Copyright (C) 2007-2008 BerLinux Solutions GbR                        *
00006  *                           Stefan Schwarzer & Guido Madaus               *
00007  *                                                                         *
00008  *   Copyright (C) 2009-2013 BerLinux Solutions GmbH                       *
00009  *                                                                         *
00010  *   Authors:                                                              *
00011  *      Stefan Schwarzer   <stefan.schwarzer@diskohq.org>,                 *
00012  *      Matthias Hardt     <matthias.hardt@diskohq.org>,                   *
00013  *      Jens Schneider     <jens.schneider@diskohq.org>,                   *
00014  *      Guido Madaus       <guido.madaus@diskohq.org>,                     *
00015  *      Patrick Helterhoff <patrick.helterhoff@diskohq.org>,               *
00016  *      René Bählkow       <rene.baehlkow@diskohq.org>                     *
00017  *                                                                         *
00018  *   This library is free software; you can redistribute it and/or         *
00019  *   modify it under the terms of the GNU Lesser General Public            *
00020  *   License version 2.1 as published by the Free Software Foundation.     *
00021  *                                                                         *
00022  *   This library is distributed in the hope that it will be useful,       *
00023  *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
00024  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU     *
00025  *   Lesser General Public License for more details.                       *
00026  *                                                                         *
00027  *   You should have received a copy of the GNU Lesser General Public      *
00028  *   License along with this library; if not, write to the                 *
00029  *   Free Software Foundation, Inc.,                                       *
00030  *   51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA            *
00031  **************************************************************************/
00032 
00033 #include "mmsinput/mmsinputgesture.h"
00034 #include <stdlib.h>
00035 
00036 MMSInputGesture::MMSInputGesture(int sensitivity)  {
00037     dy=0;
00038     dx=0;
00039     this->threshold = sensitivity;
00040 }
00041 
00042 MMSInputGesture::~MMSInputGesture() {
00043 
00044 }
00045 
00046 void MMSInputGesture::addInfo(MMSInputEvent *event) {
00047     dx+=event->dx;
00048     dy+=event->dy;
00049 }
00050 
00051 void MMSInputGesture::reset() {
00052     dx=0;
00053     dy=0;
00054 }
00055 
00056 MMSINPUTGESTURE MMSInputGesture::guess() {
00057 
00058     if((dx < (-1 *this->threshold))&&(abs(dy)< abs(dx)/2))
00059         return MMSINPUTGESTURE_LEFT;
00060     if((dx > this->threshold)&&(abs(dy)<abs(dx)/2))
00061         return MMSINPUTGESTURE_RIGHT;
00062     if((dy < (-1 * this->threshold))&&(abs(dx)<abs(dy)/2))
00063         return MMSINPUTGESTURE_UP;
00064     if((dy > this->threshold)&&(abs(dx)<abs(dy)/2))
00065         return MMSINPUTGESTURE_DOWN;
00066 
00067 
00068     return MMSINPUTGESTURE_UKN;
00069 }
00070