ccpdfviewer.h

#ifndef CCPDFVIEWER_H
#define CCPDFVIEWER_H
 
#include <QImage>
#include <QWidget>
 
/* Forward declarations */
class CCPdfDocument;
class QScrollArea;
class QLabel;
 
namespace Ui {
class CCPdfViewer;
}
 
class CCPdfViewer : public QWidget {
    Q_OBJECT
 
public:
    explicit CCPdfViewer(QWidget* parent = nullptr);
    Q_DISABLE_COPY(CCPdfViewer);
 
    ~CCPdfViewer();
 
    bool bindDocument(CCPdfDocument* bindDocument);
 
    void unbindDocument();
 
    inline float current_zoom() const {
        return view_zoom;
    }
 
    inline void set_zoom_step(const float zoom_step) {
        this->zoom_step = zoom_step;
    }
 
    enum class ZoomDirection {
        ZOOM_IN, 
        ZOOM_OUT 
    };
 
public slots:
    inline void zoom(const ZoomDirection direction) {
        switch (direction) {
        case ZoomDirection::ZOOM_IN:
            view_zoom += zoom_step;
            break;
        case ZoomDirection::ZOOM_OUT:
            view_zoom -= zoom_step;
            break;
        }
    }
 
    inline void fresh_zoom(const ZoomDirection direction) {
        zoom(direction);
        fresh_render();
    }
 
public slots:
    void fresh_render();
 
private:
    Ui::CCPdfViewer* ui; 
    CCPdfDocument* document_for_view { nullptr }; 
    float view_zoom { 1.0f }; 
    float zoom_step { 0.1f }; 
    QImage cached_image; 
    QLabel* imageLabel; 
    void init_internal(void);
};
 
#endif // CCPDFVIEWER_H