kimagefilepreview.h

/*
    This file is part of the KDE project.
    SPDX-FileCopyrightText: 2001 Martin R. Jones <mjones@kde.org>
    SPDX-FileCopyrightText: 2001 Carsten Pfeiffer <pfeiffer@kde.org>
    SPDX-FileCopyrightText: 2008 Rafael Fernández López <ereslibre@kde.org>
 
    SPDX-License-Identifier: LGPL-2.0-only
*/
 
#ifndef KIMAGEFILEPREVIEW_H
#define KIMAGEFILEPREVIEW_H
 
#include <QPixmap>
#include <QUrl>
#include <kpreviewwidgetbase.h>
 
#include <memory>
 
class KFileItem;
class KJob;
class KImageFilePreviewPrivate;
 
namespace KIO
{
class PreviewJob;
}
 
/**
 * @class KImageFilePreview kimagefilepreview.h <KImageFilePreview>
 *
 * Image preview widget for the file dialog.
 */
class KIOFILEWIDGETS_EXPORT KImageFilePreview : public KPreviewWidgetBase
{
    Q_OBJECT
 
public:
    /**
     * Creates a new image file preview.
     *
     * @param parent The parent widget.
     */
    explicit KImageFilePreview(QWidget *parent = nullptr);
 
    /**
     * Destroys the image file preview.
     */
    ~KImageFilePreview() override;
 
    /**
     * Returns the size hint for this widget.
     */
    QSize sizeHint() const override;
 
public Q_SLOTS:
    /**
     * Shows a preview for the given @p url.
     */
    void showPreview(const QUrl &url) override;
 
    /**
     * Clears the preview.
     */
    void clearPreview() override;
 
protected Q_SLOTS:
    void showPreview();
    void showPreview(const QUrl &url, bool force);
 
    virtual void gotPreview(const KFileItem &, const QPixmap &);
 
protected:
    void resizeEvent(QResizeEvent *event) override;
    virtual KIO::PreviewJob *createJob(const QUrl &url, int width, int height);
 
private:
    std::unique_ptr<KImageFilePreviewPrivate> const d;
 
    Q_DISABLE_COPY(KImageFilePreview)
};
 
#endif // KIMAGEFILEPREVIEW_H