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qgsprevieweffect.h
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qgsprevieweffect.h
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/***************************************************************************
qgsprevieweffect.h
-------------------
begin : March 2014
copyright : (C) 2014 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 QGSPREVIEWEFFECT_H
#define QGSPREVIEWEFFECT_H
#include <QGraphicsEffect>
#include "qgis_sip.h"
#include "qgis_gui.h"
/**
* \ingroup gui
* A graphics effect which can be applied to a widget to simulate various printing and
* color blindness modes.
*/
class GUI_EXPORT QgsPreviewEffect: public QGraphicsEffect
{
Q_OBJECT
public:
enum PreviewMode
{
PreviewMono,
PreviewAchromatopsia,
PreviewProtanopia,
PreviewDeuteranopia,
PreviewTritanopia
};
QgsPreviewEffect( QObject *parent SIP_TRANSFERTHIS );
/**
* Sets the mode for the preview effect, which controls how the effect modifies a widgets appearance.
* \param mode PreviewMode to use to draw the widget
* \see mode
* \since QGIS 2.3
*/
void setMode( PreviewMode mode );
/**
* Returns the mode used for the preview effect.
* \returns PreviewMode currently used by the effect
* \see setMode
* \since QGIS 2.3
*/
PreviewMode mode() const { return mMode; }
protected:
void draw( QPainter *painter ) override;
private:
PreviewMode mMode;
QRgb simulateColorBlindness( QRgb &originalColor, PreviewMode type );
void simulateAchromatopsia( int &r, int &g, int &b, int &red, int &green, int &blue );
void simulateProtanopia( int &r, int &g, int &b, int &red, int &green, int &blue );
void simulateDeuteranopia( int &r, int &g, int &b, int &red, int &green, int &blue );
void simulateTritanopia( int &r, int &g, int &b, int &red, int &green, int &blue );
};
#endif // QGSPREVIEWEFFECT_H