KoUnitWidgets.h

/* This file is part of the KDE project
   Copyright (C) 2002, Rob Buis(buis@kde.org)
   Copyright (C) 2004, Nicolas GOUTTE <goutte@kde.org>
 
   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.
 
   This library 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 License for more details.
 
   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
*/
 
#ifndef __KOUNITWIDGETS_H__
#define __KOUNITWIDGETS_H__
 
#include <knuminput.h>
#include <knumvalidator.h>
#include <klineedit.h>
#include <kcombobox.h>
#include <KoUnit.h>
#include <koffice_export.h>
 
 
// ----------------------------------------------------------------
//                          Support classes
 
 
class KoUnitDoubleBase;
 
// ### TODO: put it out of the public header file (if possible)
class KOFFICEUI_EXPORT KoUnitDoubleValidator : public KDoubleValidator
{
public:
    KoUnitDoubleValidator( KoUnitDoubleBase *base, TQObject *parent, const char *name = 0 );
 
    virtual TQValidator::State validate( TQString &, int & ) const;
 
private:
    KoUnitDoubleBase *m_base;
};
 

class KOFFICEUI_EXPORT KoUnitDoubleBase
{
public:
    KoUnitDoubleBase( KoUnit::Unit unit, unsigned int precision ) : m_unit( unit ), m_precision( precision ) {}
    virtual ~KoUnitDoubleBase() {}
 
    virtual void changeValue( double ) = 0;
    virtual void setUnit( KoUnit::Unit = KoUnit::U_PT ) = 0;
 
    void setValueInUnit( double value, KoUnit::Unit unit )
    {
        changeValue( KoUnit::ptToUnit( KoUnit::fromUserValue( value, unit ), m_unit ) );
    }
 
    void setPrecision( unsigned int precision ) { m_precision = precision; };
 
protected:
    friend class KoUnitDoubleValidator;
    TQString getVisibleText( double value ) const;
    double toDouble( const TQString& str, bool* ok ) const;
 
protected:
    KoUnitDoubleValidator *m_validator;
    KoUnit::Unit m_unit;
    unsigned int m_precision;
};
 
 
// ----------------------------------------------------------------
//                          Widget classes
 

class KOFFICEUI_EXPORT KoUnitDoubleSpinBox : public KDoubleSpinBox, public KoUnitDoubleBase
{
    TQ_OBJECT
  
public:
    KoUnitDoubleSpinBox( TQWidget *parent = 0L, const char *name = 0L );
    // lower, upper, step and value are in pt
    KoUnitDoubleSpinBox( TQWidget *parent, double lower, double upper, double step, double value = 0.0,
                         KoUnit::Unit unit = KoUnit::U_PT, unsigned int precision = 2, const char *name = 0 );
    // added so the class can be used in .ui files(by Tymoteusz Majewski, maju7@o2.pl)
    virtual void changeValue( double );
    virtual void setUnit( KoUnit::Unit = KoUnit::U_PT );

    double value( void ) const;

    void setMinValue(double min);

    void setMaxValue(double max);

    void setLineStep(double step);

    void setLineStepPt(double step);

    void setMinMaxStep( double min, double max, double step );
 
signals:
    void valueChangedPt( double );
 
 
private:
    double m_lowerInPoints; 
    double m_upperInPoints; 
    double m_stepInPoints;  
 
private slots:
    // exists to do emits for valueChangedPt
    void privateValueChanged();
};
 

class KOFFICEUI_EXPORT KoUnitDoubleLineEdit : public KLineEdit, public KoUnitDoubleBase
{
    TQ_OBJECT
  
public:
    KoUnitDoubleLineEdit( TQWidget *parent = 0L, const char *name = 0L );
    KoUnitDoubleLineEdit( TQWidget *parent, double lower, double upper, double value = 0.0, KoUnit::Unit unit = KoUnit::U_PT, unsigned int precision = 2, const char *name = 0 );
 
    virtual void changeValue( double );
    virtual void setUnit( KoUnit::Unit = KoUnit::U_PT );

    double value( void ) const;
 
protected:
    bool eventFilter( TQObject* obj, TQEvent* ev );
 
private:
    double m_value;
    double m_lower;
    double m_upper;
    double m_lowerInPoints; 
    double m_upperInPoints; 
};

class KOFFICEUI_EXPORT KoUnitDoubleComboBox : public KComboBox, public KoUnitDoubleBase
{
    TQ_OBJECT
  
public:
    KoUnitDoubleComboBox( TQWidget *parent = 0L, const char *name = 0L );
    KoUnitDoubleComboBox( TQWidget *parent, double lower, double upper, double value = 0.0, KoUnit::Unit unit = KoUnit::U_PT, unsigned int precision = 2, const char *name = 0 );
 
    virtual void changeValue( double );
    void updateValue( double );
    virtual void setUnit( KoUnit::Unit = KoUnit::U_PT );

    double value( void ) const;
    void insertItem( double, int index = -1 );
 
protected:
    bool eventFilter( TQObject* obj, TQEvent* ev );
 
signals:
    void valueChanged(double);
 
private slots:
    void slotActivated( int );
 
protected:
    double m_value;
    double m_lower;
    double m_upper;
    double m_lowerInPoints; 
    double m_upperInPoints; 
};

class KOFFICEUI_EXPORT KoUnitDoubleSpinComboBox : public TQWidget
{
    TQ_OBJECT
  
public:
    KoUnitDoubleSpinComboBox( TQWidget *parent = 0L, const char *name = 0L );
    KoUnitDoubleSpinComboBox( TQWidget *parent, double lower, double upper, double step, double value = 0.0, KoUnit::Unit unit = KoUnit::U_PT, unsigned int precision = 2, const char *name = 0 );
 
    void insertItem( double, int index = -1 );
    void updateValue( double );
    double value( void ) const;
 
signals:
    void valueChanged(double);
 
private slots:
    void slotUpClicked();
    void slotDownClicked();
 
private:
    KoUnitDoubleComboBox *m_combo;
    double m_step;
};
 
#endif