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/*
    This file is part of the KDE games library
    Copyright (C) 2001-2002 Andreas Beckermann (b_mann@gmx.de)
    Copyright (C) 2001 Martin Heni (kde at heni-online.de)

    This library is free software; you can redistribute it and/or
    modify it under the terms of the GNU Library General Public
    License version 2 as published by the Free Software Foundation.

    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
    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public License
    along with this library; see the file COPYING.LIB.  If not, write to
    the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
    Boston, MA 02110-1301, USA.
*/

#ifndef __KGAMECHAT_H__
#define __KGAMECHAT_H__

#include <QtCore/QString>

#include "kchatbase.h"
#include <libkdegames_export.h>
class KPlayer;
class KGame;
class KGamePropertyBase;

class KGameChatPrivate;

/**
 * \class KGameChat kgamechat.h <KGame/KGameChat>
 * 
 * @short A Chat widget for KGame-based games
 *
 * Call @ref setFromPlayer() first - this will be used as the "from" part of
 * every message you will send. Otherwise it won't work! You can also use the
 * fromPlayer parameter in the constructor though...
 *
 * @author Andreas Beckermann <b_mann@gmx.de>
 **/
class KDEGAMES_EXPORT KGameChat : public KChatBase
{
	Q_OBJECT
public:
	/**
	 * Construct a @ref KGame chat widget on @p game that used @p msgid for
	 * the chat message. The @p fromPlayer is the local player (see @ref
	 * setFromPlayer).
	 **/
	KGameChat(KGame* game, int msgid, KPlayer* fromPlayer, QWidget * parent, KChatBaseModel* model=0, KChatBaseItemDelegate* delegate=0);

	/**
	 * @overload
	 * To make use of this widget you need to call @ref setFromPlayer
	 * manually.
	 **/
	KGameChat(KGame* game, int msgId, QWidget* parent, KChatBaseModel* model=0, KChatBaseItemDelegate* delegate=0);

	/**
	 * @overload
	 * This constructs a widget that is not usable. You must call at least
	 * setGame, setFromPlayer and setMessageId manually.
	 **/
	explicit KGameChat(QWidget* parent);

	virtual ~KGameChat();

	enum SendingIds {
		SendToGroup = 1
	};

	/**
	 * This sets the fromPlayer to @p player. The fromPlayer is the
	 * player that will appear as "from" when you send messages through this
	 * widget.
	 * @param player The player of this widget
	 **/
	void setFromPlayer(KPlayer* player);

	KPlayer* fromPlayer() const;

	/**
	 * Set the @ref KGame object for this chat widget. All messages will be
	 * sent through this object. You don't have to implement any send
	 * functions, just call this function, call @ref setFromPlayer and be
	 * done :-)
	 * @param g The @ref KGame object the messages will be sent through
	 **/
	void setKGame(KGame* g);

	KGame* game() const;

	/**
	 * @return The id of the messages produced by KGameChat. The id will be
	 * used in @ref KGame as parameter msgid in the method @ref KGame::sendMessage
	 **/
	int messageId() const;

	/**
	 * Change the message id of the chat widget. It is recommended that you
	 * don't use this but prefer the constructor instead, but in certain
	 * situations (such as using this widget in Qt designer) it may be
	 * useful to change the message id.
	 *
	 * See also @ref messageId
	 **/
	void setMessageId(int msgid);

	/**
	 * reimplemented from @ref KChatBase
	 * @return @ref KPlayer::name() for the player set by @ref setFromPlayer
	 **/
	virtual QString fromName() const;


public Q_SLOTS:
	virtual void addMessage(const QString& fromName, const QString& text) { KChatBase::addMessage(fromName, text);}
	virtual void addMessage(int fromId, const QString& text);

	void slotReceiveMessage(int, const QByteArray&, quint32 receiver, quint32 sender);

protected:
	/**
	 * @param id The ID of the sending entry, as returned by @ref
	 * KChatBase::sendingEntry
	 * @return True if the entry "send to all" was selected, otherwise false
	 **/
	bool isSendToAllMessage(int id) const;

	/**
	 * Used to indicate whether a message shall be sent to a group of
	 * players. Note that this was not yet implemented when this doc was
	 * written so this description might be wrong. (FIXME)
	 * @param id The ID of the sending entry, as returned by @ref
	 * KChatBase::sendingEntry
	 * @return True if the message is meant to be sent to a group (see @ref
	 * KPlayer::group), e.g. if "send to my group" was selected.
	 **/
	bool isToGroupMessage(int id) const;
	

	/**
	 * Used to indicate whether the message shall be sent to a single player
	 * only. Note that you can also call @ref isSendToAllMessage and @ref
	 * isToGroupMessage - if both return false it must be a player message.
	 * This behaviour might be changed later - so don't depend on it.
	 *
	 * See also toPlayerId
	 * @param id The ID of the sending entry, as returned by 
	 * KChatBase::sendingEntry
	 * @return True if the message shall be sent to a special player,
	 * otherwise false.
	 **/
	bool isToPlayerMessage(int id) const;

	/**
	 * @param id The ID of the sending entry, as returned by
	 * KChatBase::sendingEntry
	 * @return The ID of the player (see KPlayer::id) the sending entry
	 * belongs to. Note that the parameter id is an id as returned by ref
	 * KChatBase::sendingEntry and the id this method returns is a 
	 * KPlayer ID. If isToPlayerMessage returns false this method
	 * returns -1
	 **/
	int playerId(int id) const;

	/**
	 * @param playerId The ID of the KPlayer object
	 * @return The ID of the sending entry (see KChatBase) or -1 if
	 * the player id was not found.
	 **/
	int sendingId(int playerId) const;

	/**
	 * @return True if the player with this ID was added before (see 
	 * slotAddPlayer)
	 **/
	bool hasPlayer(int id) const;

	/**
	 * @param name The name of the added player
	 * @return A string that will be added as sending entry in @ref
	 * KChatBase. By default this is "send to name" where name is the name
	 * that you specify. See also KChatBase::addSendingEntry
	 **/
	virtual QString sendToPlayerEntry(const QString& name) const;


protected Q_SLOTS:
	/**
	 * Unsets a KGame object that has been set using setKGame
	 * before. You don't have to call this - this is usually done
	 * automatically.
	 **/
	void slotUnsetKGame();


	void slotPropertyChanged(KGamePropertyBase*, KPlayer*);
	void slotAddPlayer(KPlayer*);
	void slotRemovePlayer(KPlayer*);

	/**
	 * Called when KPlayer::signalNetworkData is emitted. The message
	 * gets forwarded to slotReceiveMessage if @p me equals
	 * fromPlayer.
	 **/
	void slotReceivePrivateMessage(int msgid, const QByteArray& buffer, quint32 sender, KPlayer* me);

protected:
	virtual void returnPressed(const QString& text);

private:
	void init(KGame* g, int msgid);

private:
	KGameChatPrivate* const d;
};

#endif