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#pragma once
#include <QtQuick/qquickitem.h>
#include <qfuture.h>
#include <qfuturewatcher.h>
#include <qobject.h>
#include <qqmlintegration.h>
namespace caelestia {
class ImageAnalyser : public QObject {
Q_OBJECT
QML_ELEMENT
Q_PROPERTY(QString source READ source WRITE setSource NOTIFY sourceChanged)
Q_PROPERTY(QQuickItem* sourceItem READ sourceItem WRITE setSourceItem NOTIFY sourceItemChanged)
Q_PROPERTY(int rescaleSize READ rescaleSize WRITE setRescaleSize NOTIFY rescaleSizeChanged)
Q_PROPERTY(QColor dominantColour READ dominantColour NOTIFY dominantColourChanged)
Q_PROPERTY(qreal luminance READ luminance NOTIFY luminanceChanged)
public:
explicit ImageAnalyser(QObject* parent = nullptr);
[[nodiscard]] QString source() const;
void setSource(const QString& source);
[[nodiscard]] QQuickItem* sourceItem() const;
void setSourceItem(QQuickItem* sourceItem);
[[nodiscard]] int rescaleSize() const;
void setRescaleSize(int rescaleSize);
[[nodiscard]] QColor dominantColour() const;
[[nodiscard]] qreal luminance() const;
Q_INVOKABLE void requestUpdate();
signals:
void sourceChanged();
void sourceItemChanged();
void rescaleSizeChanged();
void dominantColourChanged();
void luminanceChanged();
private:
using AnalyseResult = QPair<QColor, qreal>;
QFutureWatcher<AnalyseResult>* const m_futureWatcher;
QString m_source;
QQuickItem* m_sourceItem;
int m_rescaleSize;
QColor m_dominantColour;
qreal m_luminance;
void update();
static void analyse(QPromise<AnalyseResult>& promise, const QImage& image, int rescaleSize);
};
} // namespace caelestia
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