expressionedit.h

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/*************************************************************************************
 *                                                                                   *
 *  This program is free software; you can redistribute it and/or                    *
 *  Copyright (C) 2007 by Aleix Pol <aleixpol@kde.org>                               *
 *  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 EXPRESSIONEDIT_H
#define EXPRESSIONEDIT_H

#include <QPlainTextEdit>
#include <QCompleter>
#include <QLabel>
#include <QTreeView>
#include <analitzagui/algebrahighlighter.h>

#include "analitzaguiexport.h"

class QKeyEvent;

class OperatorsModel;

namespace Analitza
{
class Variables;
class Analyzer;
class Expression;

class ANALITZAGUI_EXPORT ExpressionEdit : public QPlainTextEdit
{
    Q_OBJECT
    public:
        explicit ExpressionEdit(QWidget *parent = 0, AlgebraHighlighter::Mode ini=AlgebraHighlighter::Autodetect);
        
        ~ExpressionEdit();
        
        AlgebraHighlighter::Mode mode() { return m_highlight->mode(); }
        
        void setMode(AlgebraHighlighter::Mode en);
        
        void setAutocomplete(bool a);
        
        bool autocomplete();
        
        bool isMathML() const;
        
        void setAnalitza(Analitza::Analyzer* in);
        
        QString text() const { return this->toPlainText();}
        
        void setText(const QString &str) { setPlainText(str);}
        
        void setCorrect(bool cor);
        
        bool isCorrect() const;
        
        void setAns(const QString &ans) { m_ans=ans; }
        
        QString ans() const { return m_ans; }
        
        void setExpression(const Analitza::Expression& e);
        
        Analitza::Expression expression() const;
        
        void setExamples(const QStringList& ex) { m_examples=ex; }
    public slots:
        
        void insertText(const QString& text);
        
    private slots:
        void showSimplified();
        void cursorMov();
        void updateCompleter();
        void setActionText(QAction* text);
        
        void helper(const QString& str);
        
        void completed(const QString &word);
        
        void toMathML() { setMode(AlgebraHighlighter::MathML); }
        
        void toExpression() { setMode(AlgebraHighlighter::Expression); }
        
        void simplify();
        
        void returnP(); //FIXME: Change my name please
        
    signals:
        void returnPressed();
        
        void signalHelper(QString);
        
    protected:
        void contextMenuEvent(QContextMenuEvent * e);
    
    private:
        bool returnPress();
        QString helpShow(const QString& funcname, int param, bool bounds, const Analitza::Variables* v) const;
        void helper(const QString&, const QPoint& p);
        QString lastWord(int);
        void focusInEvent (QFocusEvent * event);
        void focusOutEvent ( QFocusEvent * event );
        
        void removenl();
        void keyPressEvent(QKeyEvent * e);
        
        QLabel *m_helptip;
        AlgebraHighlighter *m_highlight;
        
        int m_histPos;
        QStringList m_history;
        
        Analitza::Analyzer *a;
        bool m_correct;
        QString m_ans;
        QCompleter *m_completer;
        OperatorsModel *m_ops;
        
        QStringList m_examples;
        QTimer* m_hideHelpTip;
        int m_lineHeight;
};

}

#endif