/** 
 * @file llctrlselectioninterface.h
 * @brief Programmatic selection of items in a list.
 *
 * $LicenseInfo:firstyear=2006&license=viewerlgpl$
 * 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 LLCTRLSELECTIONINTERFACE_H
#define LLCTRLSELECTIONINTERFACE_H

#include "stdtypes.h"
#include "llstring.h"
#include "llui.h"

class LLSD;
class LLUUID;
class LLScrollListItem;

class LLCtrlSelectionInterface
{
public:
	virtual ~LLCtrlSelectionInterface();
	
	enum EOperation
	{
		OP_DELETE = 1,
		OP_SELECT,
		OP_DESELECT,
	};

	virtual BOOL	getCanSelect() const = 0;

	virtual S32		getItemCount() const = 0;

	virtual BOOL	selectFirstItem() = 0;
	virtual BOOL	selectNthItem( S32 index ) = 0;
	virtual BOOL	selectItemRange( S32 first, S32 last ) = 0;

	virtual S32		getFirstSelectedIndex() const = 0;

	// TomY TODO: Simply cast the UUIDs to LLSDs, using the selectByValue function
	virtual BOOL	setCurrentByID( const LLUUID& id ) = 0;
	virtual LLUUID	getCurrentID() const = 0;

			BOOL	selectByValue(const LLSD value);
			BOOL	deselectByValue(const LLSD value);
	virtual BOOL	setSelectedByValue(const LLSD& value, BOOL selected) = 0;
	virtual LLSD	getSelectedValue() = 0;

	virtual BOOL	isSelected(const LLSD& value) const = 0;

	virtual BOOL	operateOnSelection(EOperation op) = 0;
	virtual BOOL	operateOnAll(EOperation op) = 0;
};

class LLCtrlListInterface : public LLCtrlSelectionInterface
{
public:
	virtual ~LLCtrlListInterface();
	
	virtual void addColumn(const LLSD& column, EAddPosition pos = ADD_BOTTOM) = 0;
	virtual void clearColumns() = 0;
	virtual void setColumnLabel(const std::string& column, const std::string& label) = 0;
	// TomY TODO: Document this
	virtual LLScrollListItem* addElement(const LLSD& value, EAddPosition pos = ADD_BOTTOM, void* userdata = NULL) = 0;

	LLScrollListItem* addSimpleElement(const std::string& value); // defaults to bottom
	LLScrollListItem* addSimpleElement(const std::string& value, EAddPosition pos); // defaults to no LLSD() id
	virtual LLScrollListItem* addSimpleElement(const std::string& value, EAddPosition pos, const LLSD& id) = 0;

	virtual void clearRows() = 0;
	virtual void sortByColumn(const std::string& name, BOOL ascending) = 0;
};

class LLCtrlScrollInterface
{
public:
	virtual ~LLCtrlScrollInterface();
	
	virtual S32 getScrollPos() const = 0;
	virtual void setScrollPos( S32 pos ) = 0;
	virtual void scrollToShowSelected() = 0;
};

#endif
