kis_file_layer.h

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/*
 *  SPDX-FileCopyrightText: 2013 Boudewijn Rempt <boud@valdyas.org>
 *
 *  SPDX-License-Identifier: GPL-2.0-or-later
 */
#ifndef KIS_FILE_LAYER_H
#define KIS_FILE_LAYER_H
 
#include "kritaui_export.h"
 
#include "kis_external_layer_iface.h"
#include "kis_safe_document_loader.h"
#include "kis_signal_auto_connection.h"
 
class KRITAUI_EXPORT KisFileLayer : public KisExternalLayer
{
    Q_OBJECT
public:
 
    enum ScalingMethod {
        None,
        ToImageSize,
        ToImagePPI
    };
 
    KisFileLayer(KisImageWSP image, const QString &name, quint8 opacity);
    KisFileLayer(KisImageWSP image, const QString& basePath, const QString &filename, ScalingMethod scalingMethod, QString scalingFilter, const QString &name, quint8 opacity, const KoColorSpace *fallbackColorSpace = 0);
    ~KisFileLayer() override;
    KisFileLayer(const KisFileLayer& rhs);
 
    QIcon icon() const override;
 
    void resetCache(const KoColorSpace *colorSpace = 0) override;
 
    KisPaintDeviceSP original() const override;
    KisPaintDeviceSP paintDevice() const override;
    void setSectionModelProperties(const KisBaseNode::PropertyList &properties) override;
    KisBaseNode::PropertyList sectionModelProperties() const override;
 
    void setFileName(const QString &basePath, const QString &filename);
    QString fileName() const;
    QString path() const;
 
 
    ScalingMethod scalingMethod() const;
    void setScalingMethod(ScalingMethod method);
 
    QString scalingFilter() const;
    void setScalingFilter(QString method);
 
    KisNodeSP clone() const override;
    bool allowAsChild(KisNodeSP) const override;
 
    bool accept(KisNodeVisitor&) override;
    void accept(KisProcessingVisitor &visitor, KisUndoAdapter *undoAdapter) override;
 
    KUndo2Command* crop(const QRect & rect) override;
    KUndo2Command* transform(const QTransform &transform) override;
 
    void setImage(KisImageWSP image) override;
 
private Q_SLOTS:
    void slotLoadingFinished(KisPaintDeviceSP projection, qreal xRes, qreal yRes, const QSize &size);
    void slotLoadingFailed();
    void slotFileExistsStateChanged(bool exists);
    void openFile() const;
    void slotImageSizeChanged();
    void slotImageResolutionChanged();
 
Q_SIGNALS:
    void sigRequestOpenFile();
 
private:
    enum State {
        FileLoaded,
        FileNotFound,
        FileLoadingFailed
    };
 
    void changeState(State newState);
 
private:
    QString m_basePath;
    QString m_filename;
    ScalingMethod m_scalingMethod {None};
    QString m_scalingFilter;
 
    KisPaintDeviceSP m_paintDevice;
    KisSafeDocumentLoader m_loader;
    QSize m_generatedForImageSize;
    qreal m_generatedForXRes = 0.0;
    qreal m_generatedForYRes = 0.0;
 
    State m_state = FileNotFound;
 
    KisSignalAutoConnectionsStore m_imageConnections;
};
 
#endif // KIS_FILE_LAYER_H