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

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