qgsmultiedittoolbutton.h

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/***************************************************************************
     qgsmultiedittoolbutton.h
     ------------------------
    Date                 : March 2016
    Copyright            : (C) 2016 Nyall Dawson
    Email                : nyall dot dawson at gmail.com
 ***************************************************************************
 *                                                                         *
 *   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 QGSMULTIEDITTOOLBUTTON_H
#define QGSMULTIEDITTOOLBUTTON_H

#include "qgsfields.h"
#include "qgis.h"
#include <QToolButton>
#include "qgis_gui.h"

class GUI_EXPORT QgsMultiEditToolButton : public QToolButton
{
    Q_OBJECT

  public:

    enum State
    {
      Default, 
      MixedValues, 
      Changed, 
    };

    explicit QgsMultiEditToolButton( QWidget *parent SIP_TRANSFERTHIS = nullptr );

    State state() const { return mState; }

    void setField( const QgsField &field ) { mField = field; }

  public slots:

    void setIsMixed( bool mixed ) { mIsMixedValues = mixed; updateState(); }

    void setIsChanged( bool changed ) { mIsChanged = changed; updateState(); }

    void resetChanges() { mIsChanged = false; updateState(); }

    void changesCommitted() { mIsMixedValues = false; mIsChanged = false; updateState(); }

  signals:

    void setFieldValueTriggered();

    void resetFieldValueTriggered();

  private slots:

    void aboutToShowMenu();
    void setFieldTriggered();
    void resetFieldTriggered();

  private:

    bool mIsMixedValues = false;
    bool mIsChanged = false;
    State mState = Default;
    QgsField mField;

    QMenu *mMenu = nullptr;

    void updateState();

};

#endif // QGSMULTIEDITTOOLBUTTON_H