File indexing completed on 2024-05-12 15:28:17

 /***************************************************************************
     File             : ExpressionTextEdit.h
     Project          : LabPlot
     --------------------------------------------------------------------
     Copyright        : (C) 2014-2017 Alexander Semke (alexander.semke@web.de)
     Description      : widget for defining mathematical expressions
     modified version of https://doc.qt.io/qt-5/qtwidgets-tools-customcompleter-example.html
  ***************************************************************************/
 
 /***************************************************************************
  *                                                                         *
  *  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                                           *
  *                                                                         *
  ***************************************************************************/
 
 /****************************************************************************
  **
  ** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
  ** Contact: http://www.qt-project.org/legal
  **
  ** This file is part of the examples of the Qt Toolkit.
  **
  ** $QT_BEGIN_LICENSE:BSD$
  ** You may use this file under the terms of the BSD license as follows:
  **
  ** "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 Digia Plc and its Subsidiary(-ies) 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
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  ** A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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  ** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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  **
  ****************************************************************************/
 
 #ifndef EXPRESSIONTEXTEDIT_H
 #define EXPRESSIONTEXTEDIT_H
 
 #include "backend/worksheet/plots/cartesian/XYEquationCurve.h"
 #include <KTextWidgets/KTextEdit>
 
 class QCompleter;
 class EquationHighlighter;
 
 class ExpressionTextEdit : public KTextEdit {
     Q_OBJECT
 
 public:
     explicit ExpressionTextEdit(QWidget *parent = nullptr);
     EquationHighlighter* highlighter();
     void setExpressionType(XYEquationCurve::EquationType);
     void setVariables(const QStringList&);
     bool isValid() const;
 
 protected:
     void keyPressEvent(QKeyEvent*) override;
     void focusInEvent(QFocusEvent*) override;
     void focusOutEvent(QFocusEvent*) override;
     void mouseMoveEvent(QMouseEvent*) override;
 
 private slots:
     void insertCompletion(const QString&);
     void validateExpression(bool force = false);
 
 private:
     EquationHighlighter* m_highlighter;
     XYEquationCurve::EquationType m_expressionType{XYEquationCurve::EquationType::Neutral};
     QStringList m_variables;
     QCompleter* m_completer;
     bool m_isValid{false};
     QString m_currentExpression;
 
 signals:
     void expressionChanged();
 };
 
 #endif