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/***************************************************************************
* Copyright (C) 2003 by Martin Koller *
* [email protected] *
* This file is part of the KDE Control Center Module for Joysticks *
* *
* 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 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., *
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. *
***************************************************************************/
#ifndef _JOYDEVICE_H_
#define _JOYDEVICE_H_
#include <qstring.h>
#include <sys/types.h>
#undef __STRICT_ANSI__
#include <linux/joystick.h>
#define __STRICT_ANSI__
// helper class which holds all current values, file descriptor, etc. for
// one device
class JoyDevice
{
public:
enum ErrorCode
{
SUCCESS,
OPEN_FAILED,
NO_JOYSTICK,
WRONG_VERSION,
ERR_GET_VERSION,
ERR_GET_BUTTONS,
ERR_GET_AXES,
ERR_GET_CORR,
ERR_RESTORE_CORR,
ERR_INIT_CAL,
ERR_APPLY_CAL
};
enum EventType
{
BUTTON,
AXIS
};
// devicefile to use, e.g. "/dev/js0"
JoyDevice(const QString &devicefile);
~JoyDevice();
// returns one of the error-codes from above
ErrorCode open();
// return descriptive error text for given error code
QString errText(ErrorCode code) const;
int fd() const { return joyFd; }
void close();
ErrorCode restoreCorr();
// return devicefilename from constructor
const QString &device() const { return devName; }
// descriptive text for this device read from the driver
QString text() const { return descr; }
int numButtons() const { return buttons; }
int numAxes() const { return axes; }
int axisMin(int axis) const;
int axisMax(int axis) const;
// read next event from device; returns true if there was an event during the short timeout
bool getEvent(JoyDevice::EventType &type, int &number, int &value);
// methods for calibration
ErrorCode initCalibration(); // must be called first
void calcPrecision();
void resetMinMax(int axis, int value = 0);
// calculate correction values
// min[2], center[2], max[2], index 0 == minimum, index 1 == maximum
void calcCorrection(int axis, int *min, int *center, int *max);
ErrorCode applyCalibration();
private:
QString devName; // device filename
QString descr; // descriptive text
int joyFd;
int buttons;
int axes;
int *amin; // axes min values
int *amax; // axes max values
struct js_corr *corr; // calibration values during the calib. steps
struct js_corr *origCorr; // original calibration correction values
};
#endif
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