cietonguewidget.h

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/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2006-01-10
 * Description : a widget to display CIE tongue from an ICC profile.
 *
 * Copyright (C) 2006-2022 by Gilles Caulier <caulier dot gilles 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, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * ============================================================ */
 
#ifndef DIGIKAM_CIE_TONGUE_WIDGET_H
#define DIGIKAM_CIE_TONGUE_WIDGET_H
 
// Qt includes
 
#include <QWidget>
#include <QColor>
#include <QPaintEvent>
#include <QUrl>
 
// Local includes
 
#include "digikam-lcms.h"
#include "digikam_export.h"
 
namespace Digikam
{
 
class DIGIKAM_EXPORT CIETongueWidget : public QWidget
{
    Q_OBJECT
 
public:
 
    explicit CIETongueWidget(int w, int h,
                             QWidget* const parent = nullptr,
                             cmsHPROFILE hMonitor = nullptr);
    ~CIETongueWidget() override;
 
    bool setProfileData(const QByteArray& profileData = QByteArray());
    bool setProfileFromFile(const QUrl& file = QUrl());
 
    void loadingStarted();
    void loadingFailed();
    void uncalibratedColor();
 
protected:
 
    int  grids(double val) const;
 
    void outlineTongue();
    void fillTongue();
    void drawTongueAxis();
    void drawTongueGrid();
    void drawLabels();
 
    QRgb colorByCoord(double x, double y);
    void drawSmallElipse(LPcmsCIExyY xyY, BYTE r, BYTE g, BYTE b, int sz);
 
    void resizeEvent(QResizeEvent* event) override;
    void paintEvent(QPaintEvent*)         override;
 
private:
 
    void drawColorantTriangle();
    void drawWhitePoint();
    void drawPatches();
    void updatePixmap();
 
    void mapPoint(int& icx, int& icy, LPcmsCIExyY xyY);
    void biasedLine(int x1, int y1, int x2, int y2);
    void biasedText(int x, int y, const QString& txt);
 
    void setProfile(cmsHPROFILE hProfile);
 
private Q_SLOTS:
 
    void slotProgressTimerDone();
 
private:
 
    class Private;
    Private* const d;
};
 
} // namespace Digikam
 
#endif // DIGIKAM_CIE_TONGUE_WIDGET_H