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/*
ui/scrollbar.h
This file is part of the Osirion project and is distributed under
the terms of the GNU General Public License version 2
*/
#ifndef __INCLUDED_UI_SCROLLBAR_H__
#define __INCLUDED_UI_SCROLLBAR_H__
#include <string>
#include "ui/widget.h"
namespace ui
{
class Button;
/**
* @brief a scrollbar widget with a vertical layout.
*/
class ScrollBar : public Widget
{
public:
ScrollBar(Widget *parent, const float minimum = 0.0f, const float maximum = 1.0f);
~ScrollBar();
/**
* @brief the current slider value
*/
inline const float value() const {
return scrollbar_value;
}
/**
* @brief the minimum value
*/
inline const float minimum() const {
return scrollbar_minimum;
}
/**
* @brief the maximum value
*/
inline const float maximum() const {
return scrollbar_maximum;
}
/**
* @brief print widget description to console
*/
virtual void print(const size_t indent) const;
/**
* @brief set the current slider value
* @see value
*/
void set_value(const float value);
/**
* @brief set the minimum slider value
* @see minimum
*/
void set_minimum(const float minimum);
/**
* @brief set the maximum slider value
* @see maximum
*/
void set_maximum(const float maximum);
/**
* @brief set the minimum and maximum slider values
* @see minimum
* @see maximum
*/
void set_range(const float minimum, const float maximum);
/// show the widget
virtual void show();
protected:
/// resize event handler
virtual void resize();
/// draw event handler
virtual void draw();
/// emit event handler
virtual bool on_emit(Widget *sender, const Event event, void *data=0);
/**
* @brief mouse button press event handler
* */
virtual bool on_mousepress(const unsigned int button);
/**
* @brief mouse button release event handler
* */
virtual bool on_mouserelease(const unsigned int button);
/**
* @brief mouseover event handler
* */
virtual void on_mouseover(const math::Vector2f &cursor);
/**
* @brief mouse movement event handler
* */
virtual void on_mousemove(const math::Vector2f &cursor);
/**
* @brief mousehweel event handler
* */
virtual bool on_mousewheel(const math::Vector2f & direction);
private:
/// validate slider value
void validate();
float scrollbar_minimum;
float scrollbar_maximum;
float scrollbar_value;
bool scrollbar_dragging;
Button *scrollbar_minbutton;
Button *scrollbar_decbutton;
Button *scrollbar_incbutton;
Button *scrollbar_maxbutton;
};
}
#endif // __INCLUDED_UI_SCROLLBAR_H__
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