/*
Copyright (C) 2005 Matthias Braun <matze@braunis.de>

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
*/

/**
 * @author Matthias Braun
 * @file ScrollBar.hpp
 */

#ifndef __SCROLLBAR_HPP__
#define __SCROLLBAR_HPP__

#include <vector>               // for vector

#include "Child.hpp"            // for Child, Childs
#include "Component.hpp"        // for Component
#include "Event.hpp"            // for Event
#include "callback/Signal.hpp"  // for Signal

class Button;
class Painter;
class XmlReader;

/**
 * @class ScrollBar
 */
class ScrollBar : public Component
{
public:
    ScrollBar();
    virtual ~ScrollBar();

    void parse(XmlReader& reader);

    void resize(float width, float height);
    void draw(Painter& painter);
    void event(const Event& event);

    void setRange(float min, float max);
    
    float getRangeMin() const
    {
        return minVal;
    }
    float getRangeMax() const
    {
        return maxVal;
    }
    float getValue() const
    {
        return currentVal;
    }
    void setValue(float value);

    Signal<ScrollBar*, float> valueChanged;

private:
    void buttonPressed(Button* button);
    void buttonReleased(Button* button);
    
    Child& button1()
    { return childs[0]; }
    Child& button2()
    { return childs[1]; }
    Child& scroller()
    { return childs[2]; }
    
    float minVal;
    float maxVal;
    float currentVal;

    float scrollspeed;

    bool scrolling;
    float scrollOffset;
};

#endif


/** @file gui/ScrollBar.hpp */

