source: GTP/trunk/Lib/Geom/OgreStuff/include/OgreCursor.h @ 1809

/*
-----------------------------------------------------------------------------
This source file is part of OGRE
    (Object-oriented Graphics Rendering Engine)
For the latest info, see http://www.ogre3d.org/

Copyright (c) 2000-2005 The OGRE Team
Also see acknowledgements in Readme.html

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU Lesser 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 Lesser General Public License for more details.

You should have received a copy of the GNU Lesser 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, or go to
http://www.gnu.org/copyleft/lesser.txt.
-----------------------------------------------------------------------------
*/


/***************************************************************************
OgreCursor.h  -  
        The Cursor is an non-visual object that contains a the XYZ values that 
        are modified by a InputReader.
        An InputReader creates and contains a Cursor object that it uses when it 
        is set to buffered input (using the EventQueue).

        To get a graphical representation of the cursor, a CursorGuiElement is
        used, which is a MouseMotionListener to the Cursor.

-------------------
begin                : Nov 19 2002
copyright            : (C) 2002 by Kenny Sabir
email                : kenny@sparksuit.com
***************************************************************************/

#ifndef __Cursor_H__
#define __Cursor_H__

#include "OgrePrerequisites.h"
#include "OgreMouseMotionTarget.h"
#include "OgreMouseTarget.h"

namespace Ogre {
        /** The Cursor is an non-visual object that contains a the XYZ values that 
                are modified by a InputReader.
        @remarks
                An InputReader creates and contains a Cursor object that it uses when it 
                is set to buffered input (using the EventQueue).

                To get a graphical representation of the cursor, a CursorGuiElement is
                used, which is a MouseMotionListener to the Cursor.
        */
        class _OgreExport Cursor : public MouseMotionTarget, public MouseTarget
    {
    protected:
                /** Cursor position */
        Real mMouseX, mMouseY, mMouseZ;

        /** relative cursor position */
        Real mRelX, mRelY, mRelZ;

                /** Cursor limits 0-1 */
                Real mXLowLimit, mXHighLimit, mYLowLimit, mYHighLimit, mZLowLimit, mZHighLimit;

                /** Scale the cursor movements. Initially set at 1 (no scaling).
                        The scaling effects all axis, XYZ */
                Real mScale;

                /** inline function to clip a value to its low and high limits */
                inline Real limit(Real val, Real low, Real high)
                {       return (val < low) ? low: ((val > high) ? high : val); }
        public :
                Cursor();
                virtual ~Cursor();

                /** add relative amount to X */
                void addToX(Real val);

                /** add relative amount to Y */
                void addToY(Real val);

                /** add relative amount to Z */
                void addToZ(Real val);

                /** process the mouse events that are for any listeners to the cursor */
                void processEvent(InputEvent* e);


                /** get the current X position of the cursor 0 left, 1 right */
                Real getX() const;

                /** get the current Y position of the cursor 0 top, 1 bottom */
                Real getY() const;

                /** get the current Z position of the cursor 0 none, 1 full */
                Real getZ() const;

        /** get relative X cursor movement */
        Real getRelX() const {return mRelX;}

        /** get relative Y cursor movement */
        Real getRelY() const {return mRelY;}

        /** get relative Z cursor movement */
        Real getRelZ() const {return mRelZ;}



        // PositionTarget methods
        /** Gets the left of this element in relation to the screen (where 0 = far left, 1.0 = far right)  */
        Real getLeft(void) const ;

        /** Gets the top of this element in relation to the screen (where 0 = top, 1.0 = bottom)  */
        Real getTop(void) const ;

                /** The parent of the cursor is NULL as it's position is absolute in the window */
                PositionTarget* getPositionTargetParent() const;

                inline virtual bool isKeyEnabled() const
                { return false; }

                /** Gets the current cursor movement scaling factor. */
                Real getScale(void) const { return mScale; }
                /** Sets the current cursor movement scaling factor. */
                void setScale(Real scale) { mScale = scale; }
                

    };

}


#endif  // __Cursor_H__