qgsscalecombobox.h

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/***************************************************************************
                              qgsscalecombobox.h
                              ------------------------
  begin                : January 7, 2012
  copyright            : (C) 2012 by Alexander Bruy
  email                : alexander dot bruy at gmail dot 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 QGSSCALECOMBOBOX_H
#define QGSSCALECOMBOBOX_H
 
#include <QComboBox>
#include "qgis_sip.h"
#include "qgis_gui.h"
 
class GUI_EXPORT QgsScaleComboBox : public QComboBox
{
    Q_OBJECT
    Q_PROPERTY( double scale READ scale WRITE setScale NOTIFY scaleChanged )
    Q_PROPERTY( double minScale READ minScale WRITE setMinScale )
 
  public:
 
    QgsScaleComboBox( QWidget *parent SIP_TRANSFERTHIS = nullptr );
 
    QString scaleString() const;
 
    bool setScaleString( const QString &string );
 
    double scale() const;
 
    bool isNull() const;
 
    double minScale() const { return mMinScale; }
 
    static QString toString( double scale );
 
    static double toDouble( const QString &string, bool *ok = nullptr );
 
    void setAllowNull( bool allowNull );
 
    bool allowNull() const;
 
  signals:
 
    void scaleChanged( double scale );
 
  public slots:
 
    void updateScales( const QStringList &scales = QStringList() );
 
    void setScale( double scale );
 
    void setMinScale( double scale );
 
    void setNull();
 
  protected:
    void showPopup() override;
 
  private slots:
    void fixupScale();
 
  private:
    double mScale = 1.0;
    double mMinScale = 0.0;
    bool mAllowNull = false;
};
 
#endif // QGSSCALECOMBOBOX_H