doubleSpinBox_p.h

/* ********************************************************************
    itom software
    URL: http://www.uni-stuttgart.de/ito
    Copyright (C) 2016, Institut fuer Technische Optik (ITO),
    Universitaet Stuttgart, Germany

    This file is part of itom and its software development toolkit (SDK).

    itom is free software; you can redistribute it and/or modify it
    under the terms of the GNU Library General Public Licence as published by
    the Free Software Foundation; either version 2 of the Licence, or (at
    your option) any later version.
   
    In addition, as a special exception, the Institut fuer Technische
    Optik (ITO) gives you certain additional rights.
    These rights are described in the ITO LGPL Exception version 1.0,
    which can be found in the file LGPL_EXCEPTION.txt in this package.

    itom 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 Licence for more details.

    You should have received a copy of the GNU Library General Public License
    along with itom. If not, see <http://www.gnu.org/licenses/>.

    This file is a port and modified version of the 
    CTK Common Toolkit (http://www.commontk.org)
*********************************************************************** */

//  includes
#include "doubleSpinBox.h"

// Qt includes
#include <QDoubleSpinBox>
#include <QPointer>
class DoubleSpinBoxPrivate;
class ValueProxy;
class QFocusEvent;

//-----------------------------------------------------------------------------
class itomQDoubleSpinBox: public QDoubleSpinBox
{
  Q_OBJECT
  Q_PROPERTY(bool invertedControls READ invertedControls WRITE setInvertedControls)
public:
  typedef QDoubleSpinBox Superclass;
  itomQDoubleSpinBox(DoubleSpinBoxPrivate* pimpl, QWidget* widget);
  void setInvertedControls(bool invertedControls);
  bool invertedControls() const;

  virtual void stepBy(int steps);

  virtual QLineEdit* lineEdit()const;

  virtual double valueFromText(const QString &text) const;
  virtual QString textFromValue(double value) const;
  virtual int decimalsFromText(const QString &text) const;
  virtual QValidator::State validate(QString& input, int& pos)const;

  void initStyleOptionSpinBox(QStyleOptionSpinBox* option);
protected:
  DoubleSpinBoxPrivate* const d_ptr;

  void focusOutEvent(QFocusEvent * event);

  virtual StepEnabled stepEnabled () const;

  bool InvertedControls;
private:
  Q_DECLARE_PRIVATE(DoubleSpinBox);
  Q_DISABLE_COPY(itomQDoubleSpinBox);
};

//-----------------------------------------------------------------------------
class DoubleSpinBoxPrivate: public QObject
{
  Q_OBJECT
  Q_DECLARE_PUBLIC(DoubleSpinBox);
protected:
  DoubleSpinBox* const q_ptr;
public:
  DoubleSpinBoxPrivate(DoubleSpinBox& object);

  itomQDoubleSpinBox* SpinBox;
  DoubleSpinBox::SetMode Mode;
  int DefaultDecimals;
  DoubleSpinBox::DecimalsOptions DOption;
  bool InvertedControls;
  DoubleSpinBox::SizeHintPolicy SizeHintPolicy;

  double InputValue;
  double InputRange[2];

  mutable QString CachedText;
  mutable double CachedValue;
  mutable QValidator::State CachedState;
  mutable int CachedDecimals;
  mutable QSize CachedSizeHint;
  bool ForceInputValueUpdate;

  QPointer<ValueProxy> Proxy;

  void init();
  bool compare(double x1, double x2) const;
  double round(double value, int decimals)const;

  QString stripped(const QString& text, int* pos)const;

  int boundDecimals(int decimals)const;
  int decimalsForValue(double value)const;
  void setDecimals(int dec);
  void setValue(double value, int dec = -1);

  double validateAndInterpret(QString &input, int &pos,
                              QValidator::State &state, int &decimals) const;

  void connectSpinBoxValueChanged();
  void disconnectSpinBoxValueChanged();

public slots:
  void editorTextChanged(const QString& text);
  void onValueChanged();

  void onValueProxyAboutToBeModified();
  void onValueProxyModified();
};