/** 
 * @file llscrollingpanellist.h
 *
 * $LicenseInfo:firstyear=2006&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library 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;
 * version 2.1 of the License only.
 * 
 * This library 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 library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#ifndef LL_LLSCROLLINGPANELLIST_H
#define LL_LLSCROLLINGPANELLIST_H

#include <vector>

#include "llui.h"
#include "lluictrlfactory.h"
#include "llview.h"
#include "llpanel.h"

/*
 * Pure virtual class represents a scrolling panel.
 */
class LLScrollingPanel : public LLPanel
{
public:
	LLScrollingPanel(const LLPanel::Params& params) : LLPanel(params) {}
	virtual void updatePanel(BOOL allow_modify) = 0;
};


/*
 * A set of panels that are displayed in a vertical sequence inside a scroll container.
 */
class LLScrollingPanelList : public LLUICtrl
{
public:
	struct Params : public LLInitParam::Block<Params, LLUICtrl::Params>
	{};
	LLScrollingPanelList(const Params& p)
	:	LLUICtrl(p) 
	{}
	
	//BD - Make this configurable via XML?
	static const S32 GAP_BETWEEN_PANELS = 1;

	typedef std::deque<LLScrollingPanel*>	panel_list_t;

	virtual void setValue(const LLSD& value) {};

	virtual void		draw();

	void				clearPanels();
	S32					addPanel( LLScrollingPanel* panel );
	void				removePanel( LLScrollingPanel* panel );
	void				removePanel( U32 panel_index );
	void				updatePanels(BOOL allow_modify);
	const panel_list_t&	getPanelList() { return mPanelList; }

private:
	void				updatePanelVisiblilty();

	/**
	 * Notify parent about size change, makes sense when used inside accordion
	 */
	void				notifySizeChanged(S32 height);

	panel_list_t		mPanelList;
};

#endif //LL_LLSCROLLINGPANELLIST_H
