qgsscreenproperties.h

Go to the documentation of this file.

/***************************************************************************
     qgsscreenproperties.h
     ---------------
    Date                 : June 2023
    Copyright            : (C) 2023 by Nyall Dawson
    Email                : nyall dot dawson 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 QGSSCREENPROPERTIES_H
#define QGSSCREENPROPERTIES_H
 
#include "qgis.h"
#include "qgis_core.h"
#include "qgis_sip.h"
 
class QScreen;
class QgsRenderContext;

class CORE_EXPORT QgsScreenProperties
{
 
  public:

    QgsScreenProperties();

    explicit QgsScreenProperties( const QScreen *screen );
 
    bool operator==( const QgsScreenProperties &other ) const
    {
      return mValid == other.mValid
             && mDevicePixelRatio == other.mDevicePixelRatio
             && mPhysicalDpi == other.mPhysicalDpi;
    }
 
    bool operator!=( const QgsScreenProperties &other ) const
    {
      return !( *this == other );
    }

    bool isValid() const { return mValid; }

    double devicePixelRatio() const { return mDevicePixelRatio; }

    void setDevicePixelRatio( double ratio );

    double physicalDpi() const { return mPhysicalDpi; }

    void setPhysicalDpi( double dpi );

    void updateRenderContextForScreen( QgsRenderContext &context ) const;
 
  private:
 
    bool mValid = false;
    double mDevicePixelRatio = 1;
    double mPhysicalDpi = 96;
};
 
#ifndef SIP_RUN
#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) || defined(__clang__)
#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wattributes"
#elif defined(_MSC_VER)
__pragma( warning( push ) )
__pragma( warning( disable: 4273 ) )
#endif
#endif

CORE_EXPORT inline uint qHash( const QgsScreenProperties &properties ) SIP_SKIP
{
  return qHash( properties.devicePixelRatio() ) + qHash( properties.physicalDpi() );
}
 
#ifndef SIP_RUN
#if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) || defined(__clang__)
#pragma GCC diagnostic pop
#elif defined(_MSC_VER)
__pragma( warning( pop ) )
#endif
#endif
 
#endif // QGSSCREENPROPERTIES_H