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+/*
+ *  Quackle -- Crossword game artificial intelligence and analysis tool
+ *  Copyright (C) 2005-2006 Jason Katz-Brown and John O'Laughlin.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program 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 General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program; if not, write to the Free Software
+ *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  
+ *  02110-1301  USA
+ */
+
+#ifndef QUACKER_VIEW_H
+#define QUACKER_VIEW_H
+
+#include <QFrame>
+#include <QList>
+
+#include <alphabetparameters.h>
+
+namespace Quackle
+{
+	class GamePosition;
+	class History;
+	class HistoryLocation;
+	class Move;
+	class MoveList;
+	class Rack;
+}
+
+class BaseView : public QFrame
+{
+Q_OBJECT
+
+public:
+	BaseView(QWidget *parent = 0);
+	virtual ~BaseView();
+
+signals:
+	// tell user of a message, usually via status bar
+	void statusMessage(const QString &message);
+};
+
+class View : public BaseView
+{
+Q_OBJECT
+
+public:
+	View(QWidget *parent = 0);
+	virtual ~View();
+
+signals:
+	// emit to alert the rest of the application to show this
+	// as candidate move - may eventually trigger positionChanged
+	// in response
+	void setCandidateMove(const Quackle::Move &move);
+	void removeCandidateMoves(const Quackle::MoveList &moves);
+	void commit();
+
+	// emit to alert the rest of the application to reset the current
+	// player's rack - may eventually trigger positionChanged
+	// in response
+	void setRack(const Quackle::Rack &rack);
+
+	// Sets the current position's explanatory note.
+	// Does *not* alert the rest of the application.
+	void setNote(const UVString &note);
+
+public slots:
+	// called whenever game position changes; the board only changes when a
+	// move is made, but the candidate move (accessible from position.moveMade(),
+	// and the resulting board from position.boardAfterMoveMade()) change alone too.
+	// This is called in both cases.
+	// 
+	// The default implementation calls positionChanged(position) for all subviews
+	// in m_subviews.
+	virtual void positionChanged(const Quackle::GamePosition &position);
+
+	// called when user starts a simulation and this move list should
+	// supercede that from the position
+	virtual void movesChanged(const Quackle::MoveList &moves);
+
+	virtual void grabFocus();
+
+protected:
+	// keep a list of View subclasses in m_subviews
+	// and call this so their signals are emitted from this object
+	void connectSubviewSignals();
+	QList<View *> m_subviews;
+};
+
+class HistoryView : public BaseView
+{
+Q_OBJECT
+
+public:
+	HistoryView(QWidget *parent = 0);
+	virtual ~HistoryView();
+
+signals:
+	// emit to alert the rest of the application to show this
+	// as candidate move - may eventually trigger positionChanged
+	// in response
+	void goToHistoryLocation(const Quackle::HistoryLocation &location);
+
+public slots:
+	// called whenever history is added to
+	virtual void historyChanged(const Quackle::History &history);
+};
+
+#endif