KisAsyncColorSamplerHelper.h

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/*
 *  SPDX-FileCopyrightText: 2022 Dmitry Kazakov <dimula73@gmail.com>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
 
#ifndef KISASYNCCOLORSAMPLERHELPER_H
#define KISASYNCCOLORSAMPLERHELPER_H
 
#include "kritaui_export.h"
 
#include <QScopedPointer>
#include <QObject>
 
#include "kis_types.h"
 
class QPainter;
class QPainterPath;
class KoViewConverter;
class KisStrokesFacade;
class KisCanvas2;
class KoColor;
 
class KRITAUI_EXPORT KisAsyncColorSamplerHelper : public QObject
{
    Q_OBJECT
public:
    KisAsyncColorSamplerHelper(KisCanvas2 *canvas);
    ~KisAsyncColorSamplerHelper() override;
 
    bool isActive() const;
 
    void activate(bool sampleCurrentLayer, bool pickFgColor);
    void deactivate();
 
    void startAction(const QPointF &docPoint, int radius, int blend);
    void continueAction(const QPointF &docPoint);
    void endAction();
 
    QRectF colorPreviewDocRect(const QPointF &docPoint);
    void paint(QPainter &gc, const KoViewConverter &converter);
 
    void updateCursor(bool sampleCurrentLayer, bool pickFgColor);
 
    void setUpdateGlobalColor(bool value);
    bool updateGlobalColor() const;
 
Q_SIGNALS:
    void sigRequestUpdateOutline();
    void sigRequestCursor(const QCursor &cursor);
    void sigRequestCursorReset();
    void sigRawColorSelected(const KoColor &color);
 
    void sigColorSelected(const KoColor &color);
 
    void sigFinalColorSelected(const KoColor &color);
 
private Q_SLOTS:
    void activateDelayedPreview();
    void slotAddSamplingJob(const QPointF &docPoint);
    void slotColorSamplingFinished(const KoColor &rawColor);
    void slotUpdateBgColor();
    void slotCanvasZoomPreviewUpdated(const QImage &canvasImage, QRect canvasRect);
 
private:
    void activatePreview();
    void paintRectangle(QPainter &gc, const QRectF &viewRectF, const QColor &currentColor, const QColor &baseColor);
    void paintCircle(QPainter &gc, const QRectF &viewRectF, const QColor &currentColor, const QColor &baseColor);
 
    void prepareZoomPreview(const QRectF &docRect);
 
    void paintCircleCrosshair(QPainter &gc, const QRectF &viewRectF, const QColor &currentColor);
    void paintCircleCanvasPreview(QPainter &gc, const QRectF &viewRectF, const QPainterPath &clip);
    void paintCircleReferenceImagePreview(QPainter &gc, const QRectF &viewRectF, const QPainterPath &clip);
 
    struct Private;
    QScopedPointer<Private> m_d;
};
 
#endif // KISASYNCCOLORSAMPLERHELPER_H