qgsdatetimeedit.h

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/***************************************************************************
    qgsdatetimeedit.h
     --------------------------------------
    Date                 : 08.2014
    Copyright            : (C) 2014 Denis Rouzaud
    Email                : [email protected]
 ***************************************************************************
 *                                                                         *
 *   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.                                   *
 *                                                                         *
 ***************************************************************************/

#ifndef QGSDATETIMEEDIT_H
#define QGSDATETIMEEDIT_H

#include <QDateTimeEdit>
#include "qgis_sip.h"
#include "qgis_gui.h"

class GUI_EXPORT QgsDateTimeEdit : public QDateTimeEdit
{
    Q_OBJECT
    Q_PROPERTY( bool allowNull READ allowNull WRITE setAllowNull )

  public:

    explicit QgsDateTimeEdit( QWidget *parent SIP_TRANSFERTHIS = nullptr );

    void setAllowNull( bool allowNull );
    bool allowNull() const {return mAllowNull;}

    void setDateTime( const QDateTime &dateTime );

    QDateTime dateTime() const;

    void clear() override;

    void setEmpty();

  signals:

    void valueChanged( const QDateTime &date );

  protected:
    void mousePressEvent( QMouseEvent *event ) override;
    void focusOutEvent( QFocusEvent *event ) override;
    void wheelEvent( QWheelEvent *event ) override;
    void showEvent( QShowEvent *event ) override;

  private slots:
    void changed( const QDateTime &dateTime );

  private:
    bool mAllowNull = true;
    bool mIsNull = false;
    bool mIsEmpty = false;
    bool mCurrentPressEvent = false;

    QString mOriginalStyleSheet = QString();
    QAction *mClearAction;

    void displayNull( bool updateCalendar = false );

    void resetBeforeChange( int delta );

    void setMinimumEditDateTime()
    {
      setMinimumDateTime( QDateTime::fromString( QStringLiteral( "0100-01-01" ), Qt::ISODate ) );
    }
};

#endif // QGSDATETIMEEDIT_H