// Copyright (C) 2002-2004 Nikolaus Gebhardt
// This file is part of the "Irrlicht Engine".
// For conditions of distribution and use, see copyright notice in Irrlicht.h

#ifndef __I_GUI_LIST_BOX_BAR_H_INCLUDED__
#define __I_GUI_LIST_BOX_BAR_H_INCLUDED__

#include "IGUIElement.h"
#include "irrTypes.h"

namespace irr
{
namespace gui
{
	class IGUIFont;

	//! Default list box GUI element.
	class IGUIListBox : public IGUIElement
	{
	public:

		//! constructor
		IGUIListBox(IGUIEnvironment* environment, IGUIElement* parent, s32 id, core::rect<s32> rectangle)
			: IGUIElement(environment, parent, id, rectangle) {}

		//! destructor
		~IGUIListBox() {};

		//! returns amount of list items
		virtual s32 getItemCount() = 0;

		//! returns string of a list item. the may id be a value from 0 to itemCount-1
		virtual const wchar_t* getListItem(s32 id) = 0;

		//! adds an list item, returns id of item
		virtual s32 addItem(const wchar_t* text) = 0;

		//! adds an list item with an icon
		//! \param text Text of list entry
		//! \param icon Text of the Icon. This text can be for example one of the texts defined in
		//!  GUIIcons.h. 
		//! \return
		//! returns the id of the new created item
		virtual s32 addItem(const wchar_t* text, const wchar_t* icon) = 0;

		//! Sets the font which should be used as icon font. This font is set to the Irrlicht engine
		//! built-in-font by default. Icons can be displayed in front of every list item.
		//! An icon is a string, displayed with the icon font. When using the build-in-font of the
		//! Irrlicht engine as icon font, the icon strings defined in GUIIcons.h can be used.
		virtual void setIconFont(IGUIFont* font) = 0;

		//! clears the list, deletes all items in the listbox
		virtual void clear() = 0;

		//! returns id of selected item. returns -1 if no item is selected.
		virtual s32 getSelected() = 0;

		//! sets the selected item. Set this to -1 if no item should be selected
		virtual void setSelected(s32 id) = 0;
	};


} // end namespace gui
} // end namespace irr

#endif

