source/code/joypad.cpp

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/*
joypad.cpp - Enables joypad support
Copyright (C) 2005 Poul Sander

    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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Poul Sander
    R�veh�jvej 36, V. 1111
    2800 Kgs. Lyngby
    DENMARK
    blockattack@poulsander.com
*/

#include "joypad.h"

bool Joypad_init()
{
    if (0==SDL_InitSubSystem(SDL_INIT_JOYSTICK))
        return true;
    else
        return false;
}

Joypad_status Joypad_getStatus(SDL_Joystick *joystick)
{
    Joypad_status status;
    for (int i=0; i<NRofPADS; i++)
    {
        //cout << SDL_JoystickNumAxes(joystick) << endl;
        if (i*2>=SDL_JoystickNumAxes(joystick))
        {
            status.padDown[i]=false;
            status.padUp[i] = false;
            status.padLeft[i] = false;
            status.padRight[i] = false;
        }
        else
        {
            //cout << SDL_JoystickGetAxis(joystick,i*2+1)<< endl;
            if (SDL_JoystickGetAxis(joystick,i*2)<(-8000))
                status.padLeft[i]=1;
            else
                status.padLeft[i]=0;
            if (SDL_JoystickGetAxis(joystick,i*2)>(8000))
                status.padRight[i]=1;
            else
                status.padRight[i]=0;
            if (SDL_JoystickGetAxis(joystick,i*2+1)<(-8000))
                status.padUp[i]=1;
            else
                status.padUp[i]=0;
            if (SDL_JoystickGetAxis(joystick,i*2+1)>(8000))
                status.padDown[i]=1;
            else
                status.padDown[i]=0;
        }
    }//NRofPADS
    for (int i=0; i<NRofBUTTONS; i++)
    {
        if (i>=SDL_JoystickNumButtons(joystick))
            status.button[i]=false;
        else
            if (1==SDL_JoystickGetButton(joystick,i))
                status.button[i] = true;
            else
                status.button[i] = false;
    }
    return status;
}

Joypad::Joypad()
{
    up=false;
    down=false;
    left=false;
    right=false;
    but1=false;
    but2=false;
    upREL=true;
    downREL=true;
    leftREL=true;
    rightREL=true;
    but1REL=true;
    but2REL=true;
    int joynum = 0;
    while ((SDL_JoystickOpened(joynum))&&(joynum<Joypad_number))
        joynum++;
    if (joynum>=Joypad_number)
        working = false;
    else
    {
        joystick=SDL_JoystickOpen(joynum);
        if (joystick==NULL)
            working =false;
        else
            working=true;
    }
}

Joypad::~Joypad()
{
	if(working)
    		SDL_JoystickClose(joystick);
}

void Joypad::update()
{
    SDL_JoystickUpdate();
    Joypad_status status = Joypad_getStatus(joystick);
    if ((upREL)&&((status.padUp[0])||(status.padUp[1])||(status.padUp[2])||(status.padUp[3])))
    {
        up=true;
        upREL=false;
    }
    else
        up=false;
    if ((downREL)&&((status.padDown[0])||(status.padDown[1])||(status.padDown[2])||(status.padDown[3])))
    {
        down=true;
        downREL=false;
    }
    else
        down=false;
    if ((leftREL)&&((status.padLeft[0])||(status.padLeft[1])||(status.padLeft[2])||(status.padLeft[3])))
    {
        left=true;
        leftREL=false;
    }
    else
        left=false;
    if ((rightREL)&&((status.padRight[0])||(status.padRight[1])||(status.padRight[2])||(status.padRight[3])))
    {
        right=true;
        rightREL=false;
    }
    else
        right=false;
    if ((but1REL)&&((status.button[0])||(status.button[2])||(status.button[4])||(status.button[6])))
    {
        but1=true;
        but1REL=false;
    }
    else
        but1=false;
    if ((but2REL)&&((status.button[1])||(status.button[3])||(status.button[5])||(status.button[7])))
    {
        but2=true;
        but2REL=false;
    }
    else
        but2=false;
    //Now testing for up
    if (!((status.padUp[0])||(status.padUp[1])||(status.padUp[2])||(status.padUp[3])))
        upREL = true;
    if (!((status.padDown[0])||(status.padDown[1])||(status.padDown[2])||(status.padDown[3])))
        downREL = true;
    if (!((status.padLeft[0])||(status.padLeft[1])||(status.padLeft[2])||(status.padLeft[3])))
        leftREL = true;
    if (!((status.padRight[0])||(status.padRight[1])||(status.padRight[2])||(status.padRight[3])))
        rightREL= true;
    if (!((status.button[0])||(status.button[2])||(status.button[4])||(status.button[6])))
        but1REL = true;
    if (!((status.button[1])||(status.button[3])||(status.button[5])||(status.button[7])))
        but2REL = true;
}