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FractalView.h
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FractalView.h
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#ifndef FRACTALVIEW_H
#define FRACTALVIEW_H
#include <QQuickPaintedItem>
#include <QImage>
#include <QMutex>
#include <complex>
#include "Common.h"
#include "FractalRect.h"
class FractalView : public QQuickPaintedItem
{
Q_OBJECT
Q_PROPERTY(bool isLoading READ isLoading NOTIFY isLoadingChanged)
Q_PROPERTY(Type type READ type WRITE setType NOTIFY typeChanged)
Q_PROPERTY(QPoint juliaPoint READ juliaPoint WRITE setJuliaPoint NOTIFY juliaPointChanged)
Q_PROPERTY(double zoomFactor READ zoomFactor WRITE setZoomFactor RESET resetZoomFactor NOTIFY zoomFactorChanged)
Q_PROPERTY(double xOffset READ xOffset WRITE setXOffset RESET resetXOffset NOTIFY xOffsetChanged)
Q_PROPERTY(double yOffset READ yOffset WRITE setYOffset RESET resetYOffset NOTIFY yOffsetChanged)
public:
enum Type
{
Mandelbrot,
Julia,
BurningShip,
};
Q_ENUM(Type)
explicit FractalView(QQuickItem *parent = nullptr);
~FractalView();
virtual void paint(QPainter *painter);
bool isLoading() const { return m_isLoading; }
Type type() const { return m_type; }
QPoint juliaPoint() const { return m_juliaPoint; }
double zoomFactor() const { return m_zoomFactor; }
double xOffset() const { return m_xOffset; }
double yOffset() const { return m_yOffset; }
void setType(Type type);
void setJuliaPoint(QPoint point);
void setZoomFactor(double factor);
void setXOffset(double offset);
void setYOffset(double offset);
void resetNavigationRect();
void resetZoomFactor();
void resetXOffset();
void resetYOffset();
signals:
// since we want to call update() from the render thread(s), this signal is needed to get the call working properly
void updateView();
void isLoadingChanged();
void typeChanged();
void zoomChanged();
void juliaPointChanged();
void zoomFactorChanged();
void xOffsetChanged();
void yOffsetChanged();
public slots:
void cancelRender();
void rerender();
void applyZoomIn();
void applyZoomOut();
void saveImage(QString filename);
private:
FractalRect &getCurrentFractalRect();
QImage m_image;
bool m_isFullyLoaded{false};
bool m_isLoading{false};
Type m_type{Type::Mandelbrot};
QMap<Type, FractalRect> m_fractalRects;
// this is a pretty nice default value; let's use it for now
complex m_juliaPos{0.63982341, 0.123432153};
QPoint m_juliaPoint;
// Note: I don't necessarily approve of using qreals;
// I'm using them here to ensure compatibility with Qt
qreal m_width{};
qreal m_height{};
double m_zoomFactor{1};
// these offsets are used for navigation
double m_xOffset{0};
double m_yOffset{0};
QMutex m_imageMutex;
QMutex m_remainingFragmentsMutex;
int m_remainingFragments;
bool m_cancelRenderRequested{false};
};
#endif // FRACTALVIEW_H