Added a Joystick class.

1 files changed, 163 insertions, 0 deletions

diff --git a/src/joystick.cpp b/src/joystick.cpp
new file mode 100644
index 00000000..bb6e887b
--- /dev/null
+++ b/src/joystick.cpp
@@ -0,0 +1,163 @@
+/*
+ *  The Mana World
+ *  Copyright 2004 The Mana World Development Team
+ *
+ *  This file is part of The Mana World.
+ *
+ *  The Mana World 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
+ *  any later version.
+ *
+ *  The Mana World 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 The Mana World; if not, write to the Free Software
+ *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ *
+ *  $Id$
+ */
+
+#include "joystick.h"
+
+#include "configuration.h"
+#include "log.h"
+
+int Joystick::joystickCount = 0;
+
+void Joystick::init()
+{
+    SDL_InitSubSystem(SDL_INIT_JOYSTICK);
+    //SDL_JoystickEventState(SDL_ENABLE);
+    joystickCount = SDL_NumJoysticks();
+    logger->log("%i joysticks/gamepads found", joystickCount);
+    for (int i = 0; i < joystickCount; i++)
+        logger->log("- %s", SDL_JoystickName(i));
+}
+
+Joystick::Joystick(int no):
+    mDirection(0), mCalibrating(false)
+{
+    // TODO Bail out here?
+    if (no > joystickCount)
+        return;
+
+    mJoystick = SDL_JoystickOpen(no);
+
+    // TODO Bail out!
+    if (!mJoystick)
+    {
+        logger->log("Couldn't open joystick: %s", SDL_GetError());
+        return;
+    }
+
+    logger->log("Axes: %i ", SDL_JoystickNumAxes(mJoystick));
+    logger->log("Balls: %i", SDL_JoystickNumBalls(mJoystick));
+    logger->log("Hats: %i", SDL_JoystickNumHats(mJoystick));
+    logger->log("Buttons: %i", SDL_JoystickNumButtons(mJoystick));
+
+    mUpTolerance = (int)config.getValue("upTolerance", 100);
+    mDownTolerance = (int)config.getValue("downTolerance", 100);
+    mLeftTolerance = (int)config.getValue("leftTolerance", 100);
+    mRightTolerance = (int)config.getValue("rightTolerance", 100);
+}
+
+Joystick::~Joystick()
+{
+        SDL_JoystickClose(mJoystick);
+}
+
+void Joystick::update()
+{
+    mDirection = 0;
+    SDL_JoystickUpdate();
+
+    // When calibrating, don't bother the outside with our state
+    if (mCalibrating) {
+        doCalibration();
+        return;
+    };
+
+    // X-Axis
+    int position = SDL_JoystickGetAxis(mJoystick, 0);
+    if (position >= mRightTolerance)
+    {
+        mDirection |= RIGHT;
+    }
+    else if (position <= mLeftTolerance)
+    {
+        mDirection |= LEFT;
+    }
+
+    // Y-Axis
+    position = SDL_JoystickGetAxis(mJoystick, 1);
+    if (position <= mUpTolerance)
+    {
+        mDirection |= UP;
+    }
+    else if (position >= mDownTolerance)
+    {
+        mDirection |= DOWN;
+    }
+
+    // Buttons
+    for (int i = 0; i < MAX_BUTTONS; i++)
+    {
+        mButtons[i] = (SDL_JoystickGetButton(mJoystick, i) == 1);
+    }
+}
+
+void Joystick::startCalibration()
+{
+    mUpTolerance = 0;
+    mDownTolerance = 0;
+    mLeftTolerance = 0;
+    mRightTolerance = 0;
+    mCalibrating = true;
+}
+
+void Joystick::doCalibration()
+{
+    // X-Axis
+    int position = SDL_JoystickGetAxis(mJoystick, 0);
+    if (position > mRightTolerance)
+    {
+        mRightTolerance = position;
+    }
+    else if (position < mLeftTolerance)
+    {
+        mLeftTolerance = position;
+    }
+
+    // Y-Axis
+    position = SDL_JoystickGetAxis(mJoystick, 1);
+    if (position > mDownTolerance)
+    {
+        mDownTolerance = position;
+    }
+    else if (position < mUpTolerance)
+    {
+        mUpTolerance = position;
+    }
+}
+
+
+void Joystick::finishCalibration()
+{
+    config.setValue("leftTolerance", mLeftTolerance);
+    config.setValue("rightTolerance", mRightTolerance);
+    config.setValue("upTolerance", mUpTolerance);
+    config.setValue("downTolerance", mDownTolerance);
+    mCalibrating = false;
+}
+
+bool Joystick::buttonPressed(unsigned char no)
+{
+    if (no > MAX_BUTTONS)
+        return false;
+
+    return mButtons[no];
+}