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// Copyright (C) 2011, Gabriel Dos Reis.
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// - Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//
// - Redistributions in binary form must reproduce the above copyright
// notice, this list of conditions and the following disclaimer in
// the documentation and/or other materials provided with the
// distribution.
//
// - Neither the name of OpenAxiom. nor the names of its contributors
// may be used to endorse or promote products derived from this
// software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
// IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
// TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
// PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
// OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
// EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
// PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
// PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
// LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
// NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef OPENAXIOM_CONVERSATION_INCLUDED
#define OPENAXIOM_CONVERSATION_INCLUDED
#include <vector>
#include <QFrame>
#include <QLineEdit>
#include <QLabel>
#include <QFont>
#include <QEvent>
#include <QResizeEvent>
#include <QPaintEvent>
namespace OpenAxiom {
// A conversation is a set of exchanges. An exchange is a question
// followed by an answer. A conversation that takes place in a
// a certain frame is a debate.
class Debate;
class Conversation;
class Exchange;
class Question;
class Answer;
// -- A question is just a one-liner query.
class Question : public QLineEdit {
public:
explicit Question(Exchange&);
Exchange* exchange() const { return parent; }
protected:
// Automatically grab focus when mouse moves into this widget
void enterEvent(QEvent*);
private:
Exchange* const parent;
};
class Answer : public QLabel {
public:
explicit Answer(Exchange&);
Exchange* exchange() const { return parent; }
private:
Exchange* const parent;
};
class Exchange : public QFrame {
Q_OBJECT;
public:
Exchange(Conversation&, int);
// Return the parent widget of this conversation topic
Conversation* conversation() const { return parent; }
// The widget holding the query area
Question* question() { return &query; }
const Question* question() const { return &query; }
// The widget holding the reply area.
Answer* answer() { return &reply; }
const Answer* answer() const { return &reply; }
// Conversion number
int number() const { return no; }
// Reimplement positiion management.
QSize sizeHint() const;
protected:
void resizeEvent(QResizeEvent*);
private:
Conversation* const parent;
const int no;
Question query;
Answer reply;
private slots:
void reply_to_query();
};
// -- Set of conversations that make up a session.
// -- We remember and number each topic so that we
// -- can go back in the conversation set and reevaluate
// -- queries.
class Conversation : public QWidget {
Q_OBJECT;
public:
explicit Conversation(Debate&);
~Conversation();
// Holds if this conversation just started.
bool fresh() const { return children.empty(); }
// Number of exchanges in this conversation
int length() const { return children.size(); }
// Return the `i'-th conversation in this set, if any.
Exchange* operator[](int) const;
// Return the bottom left corner of the rectangle enclosing the
// the set of exchanges in this conversation.
QPoint bottom_left() const;
// Start a new conversation topic.
Exchange* new_topic();
// Override QWidegt::sizeHint. Return the cumulative sizes
// of all conversations so far.
QSize sizeHint() const;
// Return the parent engine widget.
Debate* debate() const { return const_cast<Debate*>(&group); }
public slots:
// Return the topic following a given topic in this set of conversations
Exchange* next(Exchange*);
protected:
void resizeEvent(QResizeEvent*);
void paintEvent(QPaintEvent*);
private:
typedef std::vector<Exchange*> Children;
Debate& group;
Children children;
};
}
#endif // OPENAXIOM_CONVERSATION_INCLUDED
// Local Variables:
// mode: c++
// End:
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